FUEL

Click on the applicable bookmark to selected the required model year

13A-2

GASOLINE DIRECT
INJECTION (GDI)
CONTENTS

GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 3 Injector Driver Control Relay Continuity Check 105

Intake Air Temperature Sensor Check . . . . . . . 105
SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . . 7
Engine Coolant Temperature Sensor Check . . 106
SEALANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Throttle Position Sensor Check . . . . . . . . . . . . . 106
Accelerator Pedal Position Sensor Check . . . . 107
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Accelerator Pedal Position Switch Check . . . . 107
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 9 Oxygen Sensor Check . . . . . . . . . . . . . . . . . . . . . 108
Injector Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
ON-VEHICLE SERVICE . . . . . . . . . . . . . . . . . . . . 96
Throttle Valve Control Servo Check . . . . . . . . . 109
Throttle Body (Throttle Valve Area) Cleaning . . 96
Clutch Switch Check . . . . . . . . . . . . . . . . . . . . . . . 109
Throttle Position Sensor Adjustment . . . . . . . . . . 96
Purge Control Solenoid Valve Check . . . . . . . . 109
Accelerator Pedal Position Switch and Accelerator
EGR Valve Check . . . . . . . . . . . . . . . . . . . . . . . . . 109
Pedal Position Sensor Adjustment . . . . . . . . . . . . 97
Fuel Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . 98 FUEL PUMP (HIGH PRESSURE) . . . . . . . . . . 110
Fuel Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Fuel Pump Connector Disconnection (How to
INJECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Reduce Fuel Pressure) . . . . . . . . . . . . . . . . . . . . . 102
THROTTLE BODY . . . . . . . . . . . . . . . . . . . . . . . . 118
Fuel Pump Operation Check . . . . . . . . . . . . . . . . 103
Component Location . . . . . . . . . . . . . . . . . . . . . . . 104 INJECTOR DRIVER . . . . . . . . . . . . . . . . . . . . . . 120
Engine Control Relay, Fuel Pump Relay and
Throttle Valve Control Servo Relay Continuity THROTTLE VALVE CONTROLLER . . . . . . . . 121
Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
 GDI – General Information 13A-3
GENERAL INFORMATION
The Gasoline Direct Injection System consists activities such as fuel injection control, idle
of sensors which detect the engine conditions, speed control and ignition timing control. In
the engine-ECU which controls the system addition, the engine-ECU is equipped with
based on signals from these sensors, and several diagnosis modes which simplify
actuators which operate under the control of troubleshooting when a problem develops.
the engine-ECU. The engine-ECU carries out

FUEL INJECTION CONTROL

The injector drive times and injector timing are Fuel injection is normally carried out once for
controlled so that the optimum air/fuel mixture each cylinder for every two rotations of the
is supplied to the engine to correspond to the crankshaft. The firing order is 1-3-4-2. This is
continually-changing engine operation condi- called sequential fuel injection.
tions. When the engine is cold or under a severe load,
A single injector for each cylinder is mounted the “open-loop” control keeps the air/fuel ratio
at the cylinder head. The fuel is sent under at a richer than usual level to maintain
pressure from the fuel tank to the fuel pressure driveability. When the engine is under low or
regulator (low pressure) by the fuel pump (low medium loads, the air/fuel ratio becomes leaner
pressure). The pressure is regulated by the fuel to reduce fuel consumption. When the engine
pressure regulator (low pressure) and the fuel is running at medium or high loads after having
regulated is then sent to the fuel pump (high warmed up, the “closed-loop” control uses the
pressure). The fuel under increased pressure signal from the oxygen sensor to keep the
generated by the fuel pump (high pressure) is air/fuel ratio at the optimum theoretical level.
then regulated by the fuel pressure regulator
(high pressure) and is then distributed to each
of the injectors via the delivery pipes.

THROTTLE VALVE OPENING ANGLE CONTROL

This system controls throttle valve opening target value of the throttle valve opening angle
angle electronically. The engine-ECU deter- to the throttle valve controller. The throttle valve
mines how deeply the accelerator pedal is control servo operates the throttle valve so that
depressed by means of the accelerator position it reaches the target opening angle.
sensor (APS). Then the engine-ECU sends a

IDLE SPEED CONTROL

This system maintains engine idle speed at a The engine-ECU operates the throttle valve
predetermined condition by controlling the air control servo so that engine speed is maintained
flow that passes through the throttle valve within a map value. The map value is
according to engine idling condition and engine predetermined according to engine coolant
loads at idling. temperature and air-conditioning load.

IGNITION TIMING CONTROL

The power transistor located in the ignition is determined by the engine-ECU from the
primary circuit turns ON and OFF to control engine speed, intake air volume, engine coolant
the primary current flow to the ignition coil. This temperature, atmospheric pressure and
controls the ignition timing in order to provide injection timing (intake stroke or compression
the optimum ignition timing with respect to the stroke).
engine operating conditions. The ignition timing
13A-4 GDI – General Information

SELF-DIAGNOSIS FUNCTION
D When an abnormality is detected in one code corresponding to the abnormality is
of the sensors or actuators related to output.
emission control, the engine warning lamp D The RAM data inside the engine-ECU that
(check engine lamp) illuminates as a is related to the sensors and actuators can
warning to the driver. be read by means of the MUT-II. In addition,
D When an abnormality is detected in one the actuators can be force-driven under
of the sensors or actuators, a diagnosis certain circumstances.

OTHER CONTROL FUNCTIONS

1. Fuel Pump Control condenser fan are controlled in response
Turns the fuel pump relay ON so that current to the engine coolant temperature and
is supplied to the fuel pump while the engine vehicle speed.
is cranking or running. 4. Purge Control Solenoid Valve Control
2. A/C Relay Control Refer to GROUP 17.
Turns the compressor clutch of the A/C ON 5. EGR valve Control
and OFF. Refer to GROUP 17.
3. Fan Motor Control
The revolutions of the radiator fan and

GENERAL SPECIFICATIONS
Items Specifications

Throttle body Throttle bore mm 60

Throttle position sensor Variable resistor type

Throttle valve control servo Torque motor type

Engine-ECU Identification Except vehicles for E2T72671

model No. Germany

Vehicles for Germany E2T72672

Sensors Air flow sensor Karman vortex type

Barometric pressure sensor Semiconductor type

Intake air temperature sensor Thermistor type

Engine coolant temperature sensor Thermistor type

Oxygen sensor Zirconia type

Accelerator pedal position sensor Variable resistor type

Accelerator pedal position switch Rotary contact type, within accelerator pedal position
sensor

Vehicle speed sensor Magnetic resistive element type

Camshaft position sensor Hall element type

Crank angle sensor Hall element type

Detonation sensor Piezoelectric type

Fuel pressure sensor Metallic membrane type

Power steering fluid pressure switch Contact switch type

 GDI – General Information 13A-5

Items Specifications

Actuators Engine control relay type Contact switch type

Fuel pump relay type Contact switch type

Injector driver control relay Contact switch type

Injector type and number Electromagnetic type, 4

Injector identification mark DIM 1000G

Throttle valve control servo relay Contact switch type

Throttle valve control servo Torque motor type

EGR valve Stepper motor type

Purge control solenoid valve Duty cycle type solenoid valve

Fuel pressure Regulator pressure kPa 329

regulator (low
pressure)

Fuel pressure Regulator pressure MPa 5

regulator
(high pres-
sure)
13A-6 GDI – General Information

GASOLINE DIRECT INJECTION SYSTEM DIAGRAM

*1 Oxygen sensor D Power supply Engine- z1 Injector driver (In- D Engine control relay
*2 Air flow sensor D Ignition switch – IG ECU jector) D Fuel pump relay
*3 Intake air temper- D Ignition switch – ST z2 EGR valve (Step- D Injector driver relay
ature senor D Accelerator pedal posi- per motor) D Throttle valve control
*4 Throttle position tion sensor 1 z3 Purge control so- servo relay
sensor 2 D Accelerator pedal posi- lenoid valve D A/C relay
*5 Camshaft position tion switch D Ignition coil
sensor D Vehicle speed sensor D Fan controller
*6 Crank angle sen- D A/C switch 1 D GDI ECO lamp
sor D A/C switch 2 D Engine warning lamp
*7 Barometric pres- D M/T oil temperature D Diagnosis output
sure sensor sensor D Alternator G terminal
*8 Engine coolant D Power steering fluid D Throttle valve controller
temperature sen- pressure switch
sor D Alternator FR terminal
*9 Detonation sensor D Stop lamp switch
*10 Fuel pressure D Small lamp switch
sensor D Clutch switch
D Brake vacuum sensor
D Injector wire open circuit
check signal
D Throttle valve controller

*11 Throttle position D Power supply Throttle z4 Throttle valve D Engine-ECU

sensor 1 D Ignition switch – IG valve control servo
D Accelerator pedal posi- control-
tion sensor 2 ler
D Engine-ECU

From fuel pump

(low pressure) *3 Intake air temperature
sensor
To fuel tank

z4 Throttle valve *2 Air flow sensor

*4 Throttle position sensor 2
*11 Throttle position sensor 1 control servo
*7 Barometric pres-
*10 Fuel pressure sure sensor
sensor
*5 Camshaft position
sensor

z2 EGR valve

High-pressure fuel
regulator assembly
[integrated in fuel Injector
pressure regulator z1 Injector
(high pressure)] driver Canister
Fuel pump *8 Engine coolant
(high pressure) temperature sensor
z3 Purge control
*9 Detonation sensor solenoid valve
*1 Oxygen sensor

*6 Crank angle sensor

 GDI – Service Specifications/Sealant 13A-7
SERVICE SPECIFICATIONS
Item Standard value

Adjustment voltage of throttle position 0.4 – 0.6

sensor (1st channel) V

Adjustment voltage of throttle position 4.2 – 4.8

sensor (2nd channel) V

Resistance of throttle position sensor kΩ 3.5 – 6.5

Adjustment voltage of accelerator pedal position 0.4 – 0.9

sensor (1st and 2nd channels) V

Resistance of throttle position 3.5 – 6.5

sensor (1st and 2nd channels) kΩ

Intake air temperature sensor at 20_C 2.3 – 3.0

resistance kΩ
at 80_C 0.30 – 0.42

Engine coolant temperature at 20_C 2.1 – 2.7

sensor resistance kΩ
at 80_C 0.26 – 0.36

Fuel pressure High-pressure side kPa 4–7

(kgf/cm2)

Low-pressure side kPa 324 – 343

(kgf/cm2)

Injector coil resistance Ω 0.9 – 1.1

Oxygen sensor output voltage V 0.6 – 1.0

Oxygen sensor heater resistance Ω 11 – 18

Throttle valve control servo resistance Ω 1.35 – 1.65

SEALANT
Item Specified sealant Remark

Engine coolant temperature sensor 3M Nut Locking Part No. 4171 or equivalent Drying sealant
threaded portion
13A-8 GDI – Special Tools

SPECIAL TOOLS
Tool Number Name Use

A MB991223 Harness set D Fuel gauge simple inspection

A: MB991219 A: Test harness A: Connector pin contact pressure inspection
B: MB991220 B: LED harness B: Power circuit inspection
C: Power circuit inspection
C: MB991221 C: LED harness D: Commercial tester connection
D: MB991222 adapter
D: Probe
B

MB991502 MUT-II sub D Reading diagnosis code

assembly D GDI system inspection

MB991529 Diagmose code Reading diagosis code

check harness

MB991348, Test harness set D Measurement of voltage during trouble-

MB991658 shooting
D Inspection using an analyzer

MB991709 Test harness

MB991519 Alternator harness Measurement of voltage during

connector troubleshooting

MD998478 Test harness D Measurement of voltage during trouble-

(3-pin, triangle) shooting
D Inspection using an analyzer
 GDI – Special Tools/Troubleshooting 13A-9

Tool Number Name Use

MD998709 Adaptor hose Measurement of fuel pressure

MD998742 Hose adaptor

MB991637 Fuel pressure

gauge set

TROUBLESHOOTING
DIAGNOSIS TROUBLESHOOTING FLOW
Refer to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.
NOTE
If the engine-ECU is replaced, the immobilizer-ECU and ignition
key should be replaced together with it.

DIAGNOSIS FUNCTION
ENGINE WARNING LAMP (CHECK ENGINE LAMP)
Engine warning lamp If an abnormality occurs in any of the following items related
(check engine lamp) to the Gasoline Direct Injection (GDI) system, the engine
warning lamp will illuminate.
If the lamp remains illuminated or if the lamp illuminates while
the engine is running, check the diagnosis code output.
13A-10 GDI – Troubleshooting

Engine warning lamp inspection items

Engine-ECU
Oxygen sensor
Air flow sensor
Intake air temperature sensor
Throttle position sensor (1st channel)
Throttle position sensor (2nd channel)
Engine coolant temperature sensor
Crank angle sensor
Camshaft position sensor
Barometric pressure sensor
Detonation sensor
Injector
Abnormal combustion
Immobilizer system
Abnormal fuel pressure
Brake vacuum sensor
Fuel system malfunction
Accelerator pedal position sensor (1st channel)
Accelerator pedal position sensor (2nd channel)
Electronic-controlled throttle valve system
Throttle valve control servo
Throttle valve controller
METHOD OF READING AND ERASING DIAGNOSIS
CODES
Refer to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.
INSPECTION USING MUT-II DATA LIST AND
ACTUATOR TESTING
1. Carry out inspection by means of the data list and the
actuator test function.
If there is an abnormality, check and repair the chassis
harnesses and components.
2. After repairing, re-check using the MUT-II and check that
the abnormal input and output have returned to normal
as a result of the repairs.
3. Erase the diagnosis code memory.
4. Remove the MUT-II.
5. Start the engine again and carry out a road test to confirm
that the problem has disappeared.
 GDI – Troubleshooting 13A-11
FAIL-SAFE FUNCTION REFERENCE TABLE
If the diagnosis system detects any sensor malfunction, the vehicle can be driven safely by using a default
control logic instead of the faulty sensors.

Defective part or What to do when a sensor is defective

function

Air flow sensor (1) Disables lean-mixture combustion.

(2) Determines injector basic operating time and basic ignition timing according to map
value, which has been predetermined by throttle position sensor and crank angle
sensor signals.

Intake air temperature Controls as the intake air temperature is 25_C.

sensor

Throttle position (1) Disables lean-mixture combustion.

sensor (1st channel) (2) Controls throttle valve opening angle by closed loop control by using the throttle position
sensor (2nd channel) signal.
(3) Disables the throttle valve opening angle control when the throttle position sensor
(2nd channel) signal is also defective.

Throttle position (1) Disables lean-mixture combustion.

sensor (2nd channel) (2) Controls throttle valve opening angle by closed loop control by using the throttle position
sensor (1st channel) signal.
(3) Disables the throttle valve opening angle control when the throttle position sensor
(1st channel) signal is also defective.

Engine coolant Controls as if the engine coolant temperature is 80_C. (Note that this control will continue
temperature sensor until the ignition switch is turned off even if the sensor signal return to normal.)

Camshaft position Controls according to the conditions before a failure is detected.

sensor

Vehicle speed sensor (1) Disables lean-mixture combustion. However, if a predetermined time elapses at an
engine speed of 1,500 r/min or more, the lean-mixture combustion will return to normal.
(2) Disables lean-mixture combustion during engine idling.

Barometric pressure Controls as if the barometric pressure is 101 kPa.

sensor

Detonation sensor Holds the ignition timing at that for regular gasoline.

Injector (1) Disables lean-mixture combustion.

(2) Shuts down exhaust gas recirculation.

Abnormal combustion Disables lean-mixture combustion.

Alternator FR terminal Disables inhibition control of the alternator output according to electrical load (treats the
alternator as if it is conventional one).

Fuel pressure sensor (1) Controls as if the fuel pressure is 5 MPa (if there is open or short circuit).
(2) Turns off the fuel pump relay (if the fuel pressure is excessively high).
(3) Shuts off the fuel injection (If an excessively low pressure is detected or the engine
speed exceeds 3,000 r/min).

Accelerator pedal (1) Disables lean-mixture combustion.

position sensor (1st (2) Controls the throttle valve position by using the accelerator pedal position sensor
channel) (2nd channel) signal.
(3) Disables the electronic-controlled throttle valve system if the accelerator pedal position
sensor (2nd channel) signal is also defective, and holds the throttle valve at a
predetermined angle where the vehicle can be driven safely although its performance
is reduced.
13A-12 GDI – Troubleshooting

Defective part or What to do when a sensor is defective

function

Accelerator pedal (1) Disables lean-mixture combustion.

position sensor (2nd (2) Controls the throttle valve position by using the accelerator pedal position sensor
channel) (1st channel) signal.
(3) Disables the electronic-controlled throttle valve system if the accelerator pedal position
sensor (1st channel) signal is also defective.

Electronic-controlled (1) Disables the electronic-controlled throttle valve system.

throttle valve system (2) Disables lean-mixture combustion.
(3) Disables engine idle speed feedback control.

Throttle valve position (1) Disables the electronic-controlled throttle valve system.
feedback (2) Disables lean-mixture combustion.
(3) Disables engine idle speed feedback control.

Throttle valve control (1) Disables lean-mixture combustion.

servo motor malfunc-
tion (1st phase)

Throttle valve control (1) Disables the electronic-controlled throttle valve system.
servo motor malfunc- (2) Disables lean-mixture combustion.
tion (2nd phase) (3) Disables engine idle speed feedback control.

Communication line (1) Error in communication between the throttle valve controller and engine-ECU
with the throttle valve D Disables lean-mixture combustion.
controller D Shuts off fuel supply when engine speed exceeds 3,000 r/min.
(1) Error in communication between the throttle valve controller and engine-ECU
D Disables lean-mixture combustion.
D Shuts off fuel supply when engine speed exceeds 3,000 r/min.
D The throttle valve controller controls the throttle valve opening angle by using
the accelerator pedal position sensor (2nd channel) signal.
 GDI – Troubleshooting 13A-13
INSPECTION CHART FOR DIAGNOSIS CODES
Code No. Diagnosis item Reference page

11 Oxygen sensor system 13A-14

12 Air flow sensor system 13A-15

13 Intake air temperature sensor system 13A-16

14 Throttle position sensor (2nd channel) system 13A-17

21 Engine coolant temperature sensor system 13A-18

22 Crank angle sensor system 13A-19

23 Camshaft position sensor system 13A-20

24 Vehicle speed sensor system 13A-21

25 Barometric pressure sensor system 13A-22

31 Detonation sensor system 13A-23

41 Injector system 13A-24

44 Abnormal combustion 13A-26

54 Immobilizer system 13A-27

56 Abnormal fuel pressure system 13A-28

64 Alternator FR terminal system 13A-30

66 Brake vacuum sensor system 13A-31

77 Accelerator pedal position sensor (2nd channel) system 13A-32

78 Accelerator pedal position sensor (1st channel) system 13A-33

79 Throttle position sensor (1st channel) system 13A-34

89 Abnormal fuel system 13A-35

91 Electronic-controlled throttle valve system 13A-36

92 Throttle valve position feedback system 13A-36

94 Communication line system with throttle valve controller 13A-37

95 Malfunction in throttle valve control servo motor system (1st phase) 13A-37

99 Malfunction in throttle valve control servo motor system (2nd phase) 13A-38

NOTE
Code No. 56 may be also output when air is sucked in high-pressure fuel line due to no fuel supply.
13A-14 GDI – Troubleshooting

INSPECTION PROCEDURE FOR DIAGNOSIS CODES

Code No. 11 Oxygen sensor system Probable cause
Range of check D Malfunction of the oxygen sensor
D 3 minutes have passed after engine was started. D Improper connector contact, open circuit or
D Engine coolant temperature is approx. 80_C or more. short-circuited harness wire
D Intake air temperature is 20 – 50_C. D Malfunction of the engine-ECU
D Engine speed is approx. 2,000 – 3,000 r/min
D Vehicle is moving at constant speed on a flat, level road surface
Set conditions
D The oxygen sensor output voltage is around 0.6 V for 30 seconds (does not
cross 0.6 V for 30 seconds).
D When the range of check operations given above which accompany starting
of the engine are carried out four time in succession, a problem is detected
after each operation.

NG
Check the oxygen sensor. (Refer to P.13A-108.) Replace
OK
(1) NG
Measure at the oxygen sensor connector A-55. Check the harness wire between the ox-
D Disconnect the connector, and measure at the ygen sensor and the engine control relay
harness side. connector, and repair if necessary.
(1) Voltage between 1 and earth (Ignition switch: ON)
(2) NG NG
OK: System voltage Check the following connector: B-31 Repair
(2) Continuity between 2 and earth
OK: Continuity
OK
OK
Check trouble symptom.
NG
NG
Check the harness wire between the Repair
engine-ECU and the oxygen sensor
connector.
OK

Replace the engine-ECU.

Measure at the engine-ECU connector B-28.
D Disconnect the connector, and measure at the
NG NG
harness side. Check the following connector: A-55 Repair
D Voltage between 6 and earth (Ignition switch: ON)
OK: System voltage
OK
OK
NG Check trouble symptom.
Check the following connector: B-28 Repair
NG
OK Check the harness wire between the
engine-ECU and the oxygen sensor
Check trouble symptom. connector, and repair if necessary.
NG
NG
Check the harness wire between the engine-ECU and Repair
the oxygen sensor connector.
OK

Replace the engine-ECU.

 GDI – Troubleshooting 13A-15
Code No.12 Air flow sensor system Probable cause
Range of check D Malfunction of the air flow sensor
D Engine speed is 500 r/min or more. D Open circuit or short-circuited harness wire of air
Set conditions flow sensor circuit
D Sensor output frequency is 3.3 Hz or less for 4 seconds. D Malfunction of the engine-ECU

(1) NG (1) NG
Measure at the air flow sensor connec- Measure at the air flow sensor connec- Check the harness wire between the
tor A-73. tor A-73. air flow sensor and the engine control
D Connect the connector D Disconnect the connector, and relay, and repair if necessary.
(Use the test harness MB991709) measure at the harness side.
(1) Voltage between 3 and earth (1) Voltage between 4 and earth (2), (3) NG
Check the following connector:
(Engine: Idling) (Ignition switch: ON) B-31
OK: 2.2 – 3.2 V OK: System voltage
(2) Voltage between 7 and earth (2) Voltage between 3 and earth OK NG
OK: 0 – 0.1 V (2) NG (Ignition switch: ON)
(Engine: Idling) OK: 4.8 – 5.2 V Repair
OK: 6 – 9 V (3) Continuity between 5 and earth
(Engine speed: 4,000 r/min) OK: Continuity Check trouble symptom.
OK OK NG
Check the following connector: Check the harness wire between the
A-73 engine-ECU and the air flow sensor,
OK NG and repair if necessary.
OK NG
Repair
Repair
Check trouble symptom.
NG Replace the engine-ECU.

Replace the air flow sensor.

NG
Measure at the engine-ECU connector Check the following connector:
B-28. A-73
D Connect the connector OK NG
D Voltage between 19 and earth
(Ignition switch: ON) Repair
OK: 6 – 9 V
OK Check trouble symptom.
Check the following connector: NG
B-28
Replace the air flow sensor.
OK NG

Repair
NG
Replace the engine-ECU. Check trouble symptom.
13A-16 GDI – Troubleshooting

Code No.13 Intake air temperature sensor system Probable cause

Range of check D Malfunction of the intake air temperature sensor
D After 60 seconds have passed since the engine have started D Open circuit or short-circuited harness wire of the
Set conditions intake air temperature sensor circuit
D Sensor resistance is 0.14 kΩ or less for 4 seconds. D Malfunction of the engine-ECU
or
D Sensor resistance is 50 kΩ or more for 4 seconds.

NG
Check the intake air temperature sensor. (Refer to P.13A-105.) Replace
OK
NG
Measure at the air flow sensor connector A-73. Check the following connector: B-31
D Disconnect the connector, and measure at the harness OK NG
side.
D Voltage between 6 and earth Repair
(Ignition switch: ON)
OK: 4.8 – 5.2 V
D Continuity between 5 and earth Check trouble symptom.
OK: Continuity NG
OK
Check the harness wire between the engine-ECU and the intake
Check the following connector: A-73 air temperature sensor.
OK NG OK NG

Repair Repair

NG
Check trouble symptom. Replace the engine-ECU.
 GDI – Troubleshooting 13A-17
Code No.14 Throttle position sensor system (2nd channel) Probable cause
The throttle valve controller determines whether a failure is present or not, and D Malfunction of throttle position sensor (2nd channel)
sends a signal indicating its result to the engine-ECU. D Open circuit or short-circuited harness wire in throttle
Range of check position sensor (2nd channel) or poor connector
D Ignition switch: ON contact
D Throttle position sensor (1st channel) is normal D Faulty throttle valve controller
Set conditions D Malfunction of the engine-ECU
D The throttle position sensor (1st channel) output voltage is 1.24 V or more, and
the (2nd channel) output voltage is 4.6 V or more for one second.
or
D The throttle position sensor (1st channel) output voltage is 3.53 V or less, and
the (2nd channel) output voltage is 0.2 V or less for one second.
or
D Throttle position sensor (1st and 2nd channels) output voltages are outside 4
to 6 V.

NG
Check the throttle position sensor. (Re- Replace
fer to P.13A-106.)
OK
NG NG
Measure at the throttle position sensor Check the following connector: B-15 Repair
connector A-66.
OK
D Disconnect the connector, and
measure at the harness side. NG
Check trouble symptom. Check the harness wire between the
D Voltage 1 and earth throttle position sensor and throttle
(Ignition switch: ON) valve controller.
OK: 4.8 – 5.2 V
D Continuity between 3 and earth OK NG
OK: Continuity
Repair
OK
Replace the throttle valve controller.

NG NG
Measure at engine-ECU connector Check the following connector: A-66 Repair
B-31.
OK
D Connect the connector.
D Disconnect the throttle control servo
Check trouble symptom.
connector (Close the throttle valve
fully by finger). NG
D Voltage between terminal 84 and OK
earth Check the harness wire between the Adjust the throttle position sensor. (Re-
(Ignition switch: ON) engine-ECU and throttle position sen- fer to P.13A-96.)
OK: 4.2 – 4.8 V sor.
OK NG
Check trouble symptom.
Repair
NG

Replace the engine-ECU.

NG NG
Measure at throttle valve controller con- Check the following connector: A-66 Repair
nector B-15.
OK
D Connect the connector.
D Disconnect the throttle control servo Check trouble symptom.
connector (Close the throttle valve
fully by finger). NG
D Voltage between 7 and earth
(Ignition switch: ON) Check the harness wire between the
OK: 0.4 – 0.6 V throttle valve controller and throttle
position sensor, and repair if necessary.
OK

Replace the throttle valve controller.

13A-18 GDI – Troubleshooting

Code No.21 Engine coolant temperature sensor system Probable cause

Range of check D Malfunction of the engine coolant temperature
D After 60 seconds have passed since the engine have started sensor
Set conditions D Open circuit or short-circuited harness wire of the
D Sensor resistance is 50 Ω or less for 4 seconds. engine coolant temperature sensor circuit
or D Malfunction of the engine-ECU
D Sensor resistance is 72 kΩ or more for 4 seconds.
Range of check
D After engine starts
Set conditions
D After 5 minutes or more have passed since the engine coolant temperature
after filtering has dropped from 40_C or more to less than this temperature

NG
Check the engine coolant temperature sensor. (Refer to P.13A-106.) Replace
OK
NG
Measure at the engine coolant temperature sensor connector A-76. Check the following connector: B-31
D Disconnect the connector, and measure st the harness OK NG
side.
D Voltage between 1 and earth Repair
(Ignition switch: ON)
OK: 4.8 – 5.2 V
D Continuity between 2 and earth Check trouble symptom.
OK: Continuity NG
OK
Check the harness wire between the engine-ECU and the engine
Check the following connector: A-76 coolant temperature sensor.
OK NG OK NG

Repair Repair

NG
Check trouble symptom. Replace the engine-ECU.
 GDI – Troubleshooting 13A-19
Code No.22 Crank angle sensor system Probable cause
Range of check D Malfunction of the crank angle sensor
D Engine: During cranking D Open circuit or short-circuited harness wire of the
Set conditions crank angle sensor circuit
D Sensor output voltage does not change for 4 seconds (no pulse signal is D Malfunction of the engine-ECU
being input).

NG (1) NG
Measure at the crank angle sensor con- Measure at the crank angle sensor con- Check the harness wire between the
nector A-94. nector A-94. crank angle sensor and the engine con-
D Connect the connector D Disconnect the connector, and trol relay, and repair if necessary.
(Use the test harness measure at the harness side.
MD998478) (1) Voltage between 3 and earth (2) NG
Check the following connector:
D Voltage between 2 (black clip) (Ignition switch: ON) B-31
and earth OK: System voltage
(Engine: Cranking) (2) Voltage between 2 and earth (3) NG OK NG
OK: 0 – 4.0 V (Ignition switch: ON)
D Voltage between 2 (black clip) OK: 4.8 – 5.2 V Repair
and earth (3) Continuity between 1 and earth
(Engine: Idling) OK: Continuity Check trouble symptom.
OK: 1.5 – 2.5 V
OK NG
OK
Check the following connector: Check the harness wire between the
Replace the engine-ECU. A-94 engine-ECU and the crank angle sen-
OK NG sor.
OK NG
Repair
Repair
Check trouble symptom.
NG Replace the engine-ECU.

Replace the crank angle sensor.

Check the harness wire between the
crank angle sensor and the earth, and
repair if necessary.
13A-20 GDI – Troubleshooting

Code No.23 Camshaft position sensor system Probable cause

Range of check D Malfunction of the camshaft position sensor
D While engine is cranking or running D Open circuit or short-circuited harness wire of the
Set conditions camshaft position sensor
D Sensor output voltage does not change for 4 seconds (no pulse signal is D Malfunction of the engine-ECU
being input).
or
D Abnormal pulse signal pattern is output.

NG (1) NG
Measure at the camshaft position sen- Measure at the camshaft position sen- Check the harness wire between the
sor connector A-81. sor connector A-81. camshaft position sensor and the en-
D Connect the connector (Use the D Disconnect the connector, and gine control relay, and repair if neces-
test harness MB991709) measure at the harness side. sary.
D Voltage between 2 and earth (1) Voltage between 3 and earth (2) NG
Check the following connector:
(Engine: Cranking) (Ignition switch: ON) B-31
OK: 0 – 4.0 V OK: System voltage
D Voltage between 2 and earth (2) Voltage between 2 and earth (3) NG OK NG
(Engine: Idling) (Ignition switch: ON)
OK: 0.5 – 2.0 V OK: 4.8 – 5.2 V Repair
OK (3) Continuity between 1 and earth
OK: Continuity Check trouble symptom.
Replace the engine-ECU. OK NG
Check the following connector: Check the harness wire between the
A-81 engine-ECU and the camshaft position
OK NG sensor.
OK NG
Repair
Repair
Check trouble symptom.
NG Replace the engine-ECU.

Replace the camshaft position sensor.

Check the harness wire between the
camshaft position sensor and the earth,
and repair if necessary.
 GDI – Troubleshooting 13A-21
Code No. 24 Vehicles speed sensor system Probable cause
Range of check D Malfunction of the vehicle speed sensor
D Ignition switch: ON D Improper connector contact, open circuit or
D Excluding 60 seconds after the ignition switch is turned to ON or immediately short-circuited harness wire of the vehicle speed
after the engine starts. sensor circuit
D Engine speed is 3,000 r/min or more. D Malfunction of the engine-ECU
D Driving under high engine load conditions.
Set conditions
D Sensor output voltage does not change for 4 seconds (no pulse signal input).

No
Does the speedometer operate normally? Check the vehicle speed sensor circuit. (Refer to GROUP 54
Yes – Combination Meter.)

OK
Measure at engine-ECU connector B-31. Check the following connector: B-31
D Connect the connector. OK NG
D Voltage between terminal 86 and earth
(Ignition switch: ON) Repair
OK: If the vehicle is moved forward without starting the engine,
0 V and system voltage alternates.
Check trouble symptom.
NG
NG
Check the following connector: A-71, B-19
Replace the engine-ECU.
OK NG

Repair

Check trouble symptom.

NG

Check the harness wire between the vehicle speed sensor and
engine-ECU, and repair if necessary.
13A-22 GDI – Troubleshooting

Code No.25 Barometric pressure sensor system Probable cause

Range of check D Malfunction of the barometric pressure sensor
D After 60 seconds have passed since the engine have started D Open circuit or short-circuited harness wire of the
D Battery voltage is 8 V or more. barometric pressure sensor
Set conditions D Malfunction of the engine-ECU
D Sensor output voltage is 0.2 V or less for 4 seconds.
or
D Sensor output voltage is 4.5 V or more for 4 seconds.

NG NG
Measure at the air flow sensor connec- Measure at the air flow sensor connec- Check the following connector:
tor A-73. tor A-73. B-31
D Connect the connector. (Use test D Disconnect the connector, and OK NG
harness MB991709) measure at the harness side.
D Voltage between 2 and earth (1) Voltage between 1 and earth Repair
(Ignition switch: ON) (Ignition switch: ON)
OK: 3.9 – 4.1 V OK: 4.8 – 5.2 V
(at altitude of 0 m) (2) Continuity between 5 and earth Check trouble symptom.
3.3 – 3.6 V OK: Continuity NG
(at altitude of 1,200 m)
OK
OK Check the harness wire between the
engine-ECU and the barometric pres-
sure sensor.
OK NG
Check the following connector:
A-73 Repair
OK NG
Replace the engine-ECU.
Repair
NG
Measure at the engine-ECU connector Check trouble symptom. Check the harness wire between the
B-31. engine-ECU and the barometric pres-
D Connect the connector. sure sensor.
D Voltage between 85 and earth OK NG
(Ignition switch: ON)
OK: 3.9 – 4.1 V NG Repair
(at altitude of 0 m) Check the harness wire between the
3.3 – 3.6 V engine-ECU and the barometric pres-
(at altitude of 1,200 m) sure sensor, and repair if necessary. Replace the air flow sensor.
OK OK
OK NG
Check the following connectors: Check trouble symptom. Replace the engine-ECU.
A-73, B-31
NG

Repair
 GDI – Troubleshooting 13A-23
Code No.31 Detonation sensor system Probable cause
Range of check D Malfunction of the detonation sensor
D After 60 seconds have passed since the engine have started D Open circuit or short-circuited harness wire of the
Set conditions detonation sensor
D Amount of change in the sensor output voltage (detonation sensor peak D Malfunction of the engine-ECU
voltage for each half rotation of the crankshaft) is 0.06 V or less for 200
continuous times.

OK NG
Measure at the detonation sensor con- Check the following connectors: Repair
nector A-50. A-50, B-31
D Disconnect the connector, and OK
measure at the harness side.
D Continuity between 2 and earth NG
Check trouble symptom. Check the harness wire between the
OK: Continuity engine-ECU and the detonation sensor.
NG OK NG
Check the harness wire between the Repair
detonation sensor and the earth, and
repair if necessary.
Replace the detonation sensor.

Check trouble symptom.

NG

Replace the engine-ECU.

13A-24 GDI – Troubleshooting

Code No.41 Injector system Probable cause

Range of check D Malfunction of the injector
D Engine: while cranking, or running D Faulty injector driver relay
D Engine speed: 4,000 r/min or less D Faulty injector driver
D System voltage: 10 V or more D Open circuit or short-circuited harness wire in the
D Fuel shut off, or forcible activating of injector (actuator test) is not in operation. injector drive circuit, or poor connector contact
Set conditions D Malfunction of the engine-ECU
D Injector open circuit check signal is not output from the injector driver predetermined
time(s).

NG
Check the injector. (Refer to P.13A-109.) Replace
OK
(1) NG OK
Measure at injector driver relay connec- Check the following connector: Check trouble symptom.
tor A-53. B-18
NG
D Disconnect the connector, and
NG
measure at the harness side.
Check the harness wire between the
(1) Voltage between terminal 3 and
Repair injector driver relay and ignition switch,
earth
and repair if necessary.
(Ignition switch: ON)
OK: System voltage
(2) Voltage between terminal 1 and
earth (2) NG OK
Check the following connector: Check trouble symptom.
OK: System voltage
A-23
OK NG
NG
Check the harness wire between the
Repair injector driver relay and battery, and
repair if necessary.

NG OK
Measure at engine-ECU connector Check the following connector: Check trouble symptom.
B-28. A-53
NG
D Disconnect the connector, and
NG
measure at the harness side.
Check the harness wire between the
D Voltage between terminal 20 and
Repair injector driver relay and engine-ECU,
earth (Ignition switch: ON)
and repair if necessary.
OK: System voltage
OK
(1) NG OK
Measure at injector driver connector Check the following connector: Check trouble symptom.
A-52. A-53
NG
D Disconnect the connector, and
NG
measure at the harness side.
Check the harness wire between the
(1) Voltage between 12, 21 and earth
Repair injector driver and injector driver relay,
(Ignition switch: ON)
and repair if necessary.
OK: System voltage
(2) Voltage between 13, 22 and earth
OK: System voltage (2) NG
(3) Resistance between terminals 14 Check the harness wire between the
and 23 injector driver and earth, and repair if
Resistance between terminals 15 necessary.
and 24
Resistance between terminals 16 (3) NG OK
and 25 Check the following connectors: Check trouble symptom.
Resistance between terminals 17 A-48, A-49, A-54, A-60, A-82
and 26 NG
OK: 0.9 – 1.1 Ω NG
Check the harness wire between the
OK Repair injector driver and injector, and repair
if necessary.
To the next page
 GDI – Troubleshooting 13A-25
From the previous page
OK
OK NG
Measure at engine-ECU connectors Check the following connectors: Repair
B-28, B-30. B-28, B-30
D Connect the connector. OK
D Voltage between terminal 51 and
earth Check trouble symptom.
(Ignition switch: ON)
OK: 4.0 – 5.2 V NG
D Voltage between terminal 1 and
earth Replace the injector driver.
Voltage between terminal 2 and
earth NG
Voltage between terminal 14 and Check trouble symptom. Replace the engine-ECU.
earth
Voltage between terminal 15 and
earth
(Ignition switch: ON)
OK: 8 – 11 V
NG
OK NG
Check the following connector: A-52 Check trouble symptom. Check the harness wire between the
NG injector driver and engine-ECU, and
repair if necessary.
Repair
13A-26 GDI – Troubleshooting

Code No.44 Abnormal combustion Probable cause

Range of check D Malfunction of the ignition coil
D While engine is running during lean fuel combustion D Malfunction of the spark plug
Set conditions D Malfunction of the EGR valve
D Abnormal engine speed due to mis-firing is detected by the crank angle D Open circuit or short-circuit in ignition primary
sensor circuit
D Malfunction of the injector system
D Malfunction of the engine-ECU

NG
Check the ignition coil (Refer to GROUP 16 – Ignition System). Replace
OK
(1) NG
Measure at the ignition coil connectors A-85, A-86, A-89, A-91. Check the following connector: B-18
D Disconnect the connector, and measure at the harness OK NG
side.
(1) Voltage between 1 and earth (Ignition switch: ON) (2) NG Repair
OK: System voltage
(2) Voltage between 3 and earth (Engine: Cranking)
OK: 0.5 – 4.0 V Check trouble symptom.
(3) NG
(3) Continuity between 2 and earth NG
OK: Continuity
OK Check the harness wire between the ignition coil and the ignition
switch, and repair if necessary.
Check the following connectors:
A-85, A-86, A-89, A-91
Check the following connector: B-28
OK NG
OK NG
Repair
Repair

Check trouble symptom.

Check trouble symptom.
NG
NG
Check the following items in the order given. Check the harness wire between the engine-ECU and the ignition
D Spark plugs coil.
D Compression pressure
OK NG
OK
Repair
Check the injector system (Refer to P.13A-24, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE 41)
OK Replace the engine-ECU.

Check for air leaking into the air intake system. Check the harness wire between the ignition coil and the
D Damaged intake manifold gasket earth, and repair if necessary.
D Damaged vacuum hose
D Damaged air intake hose
D Check the EGR valve.
 GDI – Troubleshooting 13A-27
Code No.54 Immobilizer system Probable cause
Range of Check D Radio interference of ID codes
D Ignition switch: ON D Incorrect ID code
Set Conditions D Malfunction of harness or connector
D Improper communication between the engine-ECU and immobilizer-ECU D Malfunction of immobilizer-ECU
D Malfunction of engine-ECU

NOTE
(1) If the ignition switches are close each other when starting the engine, radio interference may cause
this code to be displayed.
(2) This code may be displayed when registering the key ID code.

Yes
Is there another ignition key near the ignition key that is inserted Remove the extra ignition key.
in the ignition switch?
NG
Check trouble symptom.
No
Yes
Is a diagnosis code output from the immobilizer-ECU? Check the immobilizer system. (Refer to GROUP 54 – Ignition
Switch and Immobilizer System.)
No
NG
Check the following connectors: Repair
B-19, B-30, B-36
OK

Check trouble symptom.

NG
OK
Check the harness wire between the engine-ECU and the immobi- Replace the engine-ECU.
lizer-ECU.
NG

Repair
13A-28 GDI – Troubleshooting

Code No.56 Abnormal fuel pressure system Probable cause

Range of check D Malfunction of the fuel pressure sensor
D Ignition switch: ON D Open circuit or short-circuited harness wire of the
Set conditions fuel pressure sensor
D Sensor output voltage is 4.8 V or more for four seconds. D Malfunction of the engine-ECU
or D Malfunction of the fuel pump (high pressure)
D Sensor output voltage is 0.2 V or less for four seconds. D Malfunction of the fuel pressure regulator (high
Range of check pressure)
D After the engine is started, the following conditions have been detected: D Clogged high-pressure fuel line
(1) Engine speed: 1,000 r/min or more
(2) Fuel pressure: 2 MPa or more
D While engine is running
Set conditions
D Fuel pressure is 6.9 MPa or more for four seconds.
or
D Fuel pressure is 2 MPa or less for four seconds.
This diagnosis code is also output when air is sucked in high-pressure fuel line D Air sucking due to no fuel supply
due to no fuel supply.
In this case, air can be bled by letting the engine run at 2,000 r/min for at
least fifteen seconds. After the air bleeding, the diagnosis code must be erased
by the MUT-II.
 GDI – Troubleshooting 13A-29
OK NG
MUT-II Data list MUT-II Data list D Replace the high-pressure fuel
74 Fuel pressure sensor 74 Fuel pressure sensor regulator (seized regulator).
D Ignition switch: ON D Maintain the engine speed at 2,000 D Replace the high-pressure return
OK: 0 – 8 MPa r/min for at least fifteen seconds. pipe (seized pipe).
NG OK: 6.9 MPa or less
OK
NG
MUT-II Data list D Replace the fuel pump (high
74 Fuel pressure sensor pressure) (poor pump discharge
D Engine: Idle running for at least pressure)
three minutes D Replace the high-pressure regula-
OK: 4 MPa or more tor (fuel leakage at the return side).
OK

Erase diagnosis code No.56. (This

diagnosis code has been output due to
air sucking into high-pressure fuel line.
But that problem has been resolved by
revving the engine at 2,000 r/min.)

NG
Check trouble symptom. Check if input voltage from the fuel
pressure sensor to engine-ECU
OK
changes suddenly by performing an
Normal intermittent malfunction simulation test.
(Refer to GROUP 00 – Points to Note
for Intermittent Malfunction.)

NG NG
Measure at the fuel pressure sensor Measure at the fuel pressure sensor Check the following connector:
connector A-83. connector A-83. B-31
D Connect the connector. (Use test D Disconnect the connector, and OK NG
harness MB991348) measure at the harness side.
D Voltage between 2 and earth D Voltage between 1 and earth Repair
OK: 3 V or less (Ignition switch: ON)
(Engine: Cranking) OK: 4.8 – 5.2 V
0.3 – 4.7 V (Engine: Idling) D Continuity between 3 and earth Check trouble symptom.
OK OK: Continuity NG
OK
Check the harness wire between the
Check the following connectors: engine-ECU and the fuel pressure sen-
A-83, B-31 sor.
OK NG OK NG

Repair Repair

Replace the engine-ECU.

NG
Check trouble symptom. Check the harness wire between the
engine-ECU and the fuel pressure sen-
NG sor.
Measure at the engine-ECU connector Check the harness wire between the OK NG
B-31. engine-ECU and the fuel pressure sen-
D Connect the connector. sor, and repair if necessary.
Repair
D Voltage between 74 and earth
(Engine: idling)
OK: 0.3 – 4.7 V Replace the fuel pressure sensor.
OK
NG
Check the following connectors: Repair
A-83, B-31
OK

Check trouble symptom.

NG

Replace the engine-ECU.

13A-30 GDI – Troubleshooting

Code No.64 Alternator FR terminal system Probable cause

Range of check D Open circuit in alternator FR terminal circuit
D Engine speed is 50 r/min or more. D Malfunction of the engine-ECU
Set conditions
D Input voltage from the alternator FR terminal is system voltage for 20
seconds.

NG NG
Measure at the alternator connector Measure at the alternator connector Check the following connectors:
A-93. A-93. A-75, B-29
D Connect the connector. (Use test D Disconnect the connector, and OK NG
harness MB991519) measure at the harness side.
D Voltage between 4 (blue clip) D Voltage between 4 and earth Repair
and earth (Ignition switch: ON)
(Engine: Idling) OK: System voltage
(Radiator fan: Not operating) Check trouble symptom.
(Headlamp: OFF → ON) OK
NG
(Stop lamp: OFF → ON)
Check the following connector:
(Rear defogger switch: OFF → Check the harness wire between the
A-93
ON) engine-ECU and the alternator.
OK: Voltage decreases. OK NG
OK NG
OK
Repair
Repair
Replace the engine-ECU.
Check trouble symptom.
Replace the engine-ECU.
NG

Check the harness wire between the

engine-ECU and the alternator.
OK NG

Repair

Replace the alternator.

 GDI – Troubleshooting 13A-31
Code No.66 Brake vacuum sensor system Probable cause
Range of check D Malfunction of the brake vacuum sensor
D Ignition switch: ON D Improper connector contact, open circuit or
Set conditions short-circuited harness wire of the brake vacuum
D Sensor output voltage is 4.8 V or more. sensor
or D Malfunction of the engine-ECU
D Sensor output voltage is 0.2 V or less.

NG NG
Measure at the brake vacuum sensor Measure at the brake vacuum sensor Check the following connectors:
connector A-70. connector A-70. B-29, B-31
D Connect the connector. (Use test D Disconnect the connector, and OK NG
harness MB991348) measure at the harness side.
D Voltage between 1 and earth D Voltage between 3 and earth Repair
(After the engine is turned off (Ignition switch: ON)
from idle speed, turn on the OK: 4.8 – 5.2 V
ignition switch, and then depress D Continuity between 2 and earth Check trouble symptom.
the brake pedal several times. OK: Continuity NG
OK: Voltage increases.
OK
OK Check the harness wire between the
Check the following connector: engine-ECU and the brake vacuum
A-70 sensor.
OK NG OK NG

Repair Repair

Replace the engine-ECU.

NG
Check trouble symptom. Check the harness wire between the
engine-ECU and the brake vacuum
NG sensor.
Check the following connectors: Repair OK NG
A-70, B-29
OK Repair

Check trouble symptom. Replace the brake vacuum sensor.

NG
NG
Check the harness wire between the Repair
engine-ECU and the brake vacuum
sensor.
OK

Replace the engine-ECU.

13A-32 GDI – Troubleshooting

Code No.77 Accelerator pedal position sensor (2nd Probable cause

channel) system
Range of check D Malfunction of the accelerator pedal position sensor
D Accelerator pedal position sensor (1st channel) system is normal. (2nd channel)
D Communication between the engine-ECU and throttle valve controller is normal. D Open circuit or short-circuited harness wire in the
Set conditions accelerator pedal position sensor (2nd channel)
D Output voltage of accelerator position sensor (2nd channel) system is 0.2 V system, or poor connector contact
or less for one second. D Malfunction of the throttle valve controller
or D Malfunction of the engine-ECU
D Output voltage of the accelerator pedal position sensor (1st channel) is 2.5 V
or less, and output voltage of the accelerator pedal position sensor (2nd channel)
is 4.5 V or more for one second.
or
D Difference between the accelerator pedal position sensor output voltages (1st
and 2nd channels) exceeds 1.0 V (i.e. when the throttle valve opening angle
changes slightly).

NG
Check the accelerator pedal position Replace the accelerator pedal position
sensor (2nd channel). (Refer to P.13A- sensor assembly.
107.)
OK
NG NG
Measure at accelerator pedal position Check the following connector: Repair
sensor (2nd channel) connector A-84. B-15
D Disconnect the connector, and OK
measure at the harness side.
D Voltage between terminal 8 and NG
Check trouble symptom. Check the harness wire between the
earth throttle valve controller and the accelerator
(Ignition switch: ON) pedal position sensor (2nd channel).
OK: 4.8 – 5.2 V
D Continuity between terminal 7 and OK NG
earth
OK: Continuity Repair
OK
Replace the throttle valve controller.

NG NG
Measure at throttle valve controller con- Check the following connector: Repair
nector B-15. A-84
D Connect the connector. OK
D Voltage between terminal 20 and
earth NG
Check trouble symptom. Check the harness wire between the
(Ignition switch: ON) accelerator pedal position sensor (2nd
OK: 0.7 – 1.4 V channel) and throttle valve controller.
(Accelerator pedal: fully re-
leased) OK NG
4 V or more
(Accelerator pedal: fully de- Repair
pressed)
OK Adjust the accelerator pedal position
sensor (2nd channel). (Refer to P.13A-
NG 97.)
MUT-II Data list Check the accelerator pedal position
78 Accelerator pedal position sensor sensor (1st channel) system. (Refer to
(1st channel). (Refer to P.13A-78.) P.13A-33, INSPECTION PROCE-
OK DURE FOR DIAGNOSIS CODE 78.) Check trouble symptom.
NG
Replace the throttle valve controller.
Replace the throttle valve controller.
 GDI – Troubleshooting 13A-33
Code No.78 Accelerator pedal position sensor (1st Probable cause
channel) system
Range of check D Malfunction of the accelerator pedal position sensor
D Accelerator pedal position sensor (2nd channel) system is normal. (1st channel)
D Communication between the engine-ECU and throttle valve controller is normal. D Open circuit or short-circuited harness wire in the
Set conditions accelerator pedal position sensor (1st channel)
D Output voltage of accelerator position sensor (1st channel) system is 0.2 V or system, or poor connector contact
less for one second. D ON-seizure of the accelerator pedal position switch
or D Malfunction of the throttle valve controller
D Output voltage of the accelerator pedal position sensor (2nd channel) is 2.5 D Malfunction of the engine-ECU
V or less, and (1st channel) output voltage of the accelerator pedal position
sensor is 4.5 V or more for one second.
or
D Difference between the accelerator pedal position sensor (1st and 2nd channels)
output voltages exceeds 1.0 V (i.e. when the throttle valve opening angle changes
slightly).
or
D Although the accelerator pedal position switch is on, 1st-channel output voltage
of the accelerator pedal position sensor exceeds 1.1 V for one second.

NG
MUT-II Data list Check the accelerator pedal position
26 Accelerator pedal position switch switch system. (Refer to P.13A-67, IN-
(P.13A-76.) SPECTION PROCEDURE 28.)
OK
NG
Check the accelerator pedal position Replace the accelerator pedal position
sensor (1st channel). (Refer to P.13A- sensor assembly.
107.)
OK
NG NG
Measure at the accelerator pedal posi- Check the following connectors: Repair
tion sensor (1st channel) connector B-30, B-31
A-84. OK
D Disconnect the connector, and
measure at the harness side. NG
Check trouble symptom. Check the harness wire between the
D Voltage between terminal 2 and accelerator pedal position sensor (1st
earth channel) and engine-ECU.
(Ignition switch: ON)
OK: 4.8 – 5.2 V OK NG
D Continuity between terminal 5 and
earth Repair
OK: Continuity
OK Replace the engine-ECU.

NG NG
Measure at the engine-ECU B-31. Check the following connector: Repair
D Connect the connector. A-84
D Voltage between terminal 87 and OK
earth
(Ignition switch: ON) NG
Check trouble symptom. Check the harness wire between the
OK: 0.9 – 1.2 V accelerator pedal position sensor (1st
(Accelerator pedal: fully re- channel) and engine-ECU.
leased)
4 V or more OK NG
(Accelerator pedal: fully de-
pressed) Repair
OK
Adjust the accelerator pedal position
NG
MUT-II Data list Check the accelerator pedal position sensor (1t channel). (Refer to P.13A-
78 Accelerator pedal position sensor sensor (2nd channel) system. (Refer 97.)
(2nd channel). (Refer to P.13A-78.) to P.13A-32, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE 77.)
OK
Check trouble symptom.
Replace the engine-ECU. NG

Replace the engine-ECU.

13A-34 GDI – Troubleshooting

Code No.79 Throttle position sensor (1st channel) system Probable cause
The throttle valve controller determines a failure, and sends its result to the D Malfunction of the throttle position sensor (1st channel)
engine-ECU. D Open circuit or short-circuited harness wire in the
Range of check throttle position sensor (1st channel), or poor
D Ignition switch: ON connector contact
D System voltage: 8 V or more D Malfunction of the throttle valve controller
Set conditions D Malfunction of the engine-ECU
D Output voltage of the sensor remains 0.2 V for one second.
or
D Output voltage of the sensor remains 4.9 V for one second.
or
D Output voltage of the throttle position sensor (1st and 2nd channels) remains
outside 4 – 6 V for four seconds.

Yes
MUT-II Data list Follow INSPECTION PROCEDURE
Is code No. 14, 91 or 92 output? FOR DIAGNOSIS CODE.
No
NG
Check the throttle position sensor. (Re- Replace
fer to P.13A-106.)
OK
NG NG
Measure at throttle position sensor con- Check the following connector: Repair
nector A-66. B-15
D Disconnect the connector, and
OK
measure at the harness side.
D Voltage between terminal 1 and NG
Check trouble symptom. Check the harness wire between the
earth throttle valve controller and throttle
(Ignition switch: ON) position sensor.
OK: 4.8 – 5.2 V
D Continuity between terminal 3 and OK NG
earth
OK: Continuity Repair
OK
Replace the throttle valve controller.

NG NG
Measure at throttle valve controller con- Check the following connector: Repair
nector B-15. A-66
D Connect the connector.
OK
D Disconnect the throttle valve control
servo connector (Close the throttle Check trouble symptom.
valve fully by finger).
D Voltage between terminal 7 and NG
earth OK
(Ignition switch: ON) Check the harness between the throttle Adjust the throttle position sensor. (Re-
OK: 0.4 – 0.6 V position sensor and throttle valve con- fer to P.13A-96.)
troller.
OK
NG
Check trouble symptom.
Repair NG

Replace the throttle valve controller.

NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-31. A-66
D Connect the connector. OK
D Disconnect the throttle control servo
connector (Close the throttle valve NG
Check trouble symptom. Check the harness wire between the
fully by finger). throttle position sensor and engine-
D Voltage between terminal 84 and ECU, and repair if necessary.
earth
(Ignition switch: ON)
OK: 4.2 – 4.8 V
OK

Replace the engine-ECU.

 GDI – Troubleshooting 13A-35
Code No.89 Abnormal fuel system Probable cause
Range of check D Malfunction of the fuel pump (high pressure)
D Engine: Idling (during stoichio-feedback operation) D Malfunction of the intake air temperature sensor
Set conditions D Malfunction of the barometric pressure sensor
D Fuel injection correction value remains excessively low for ten seconds or more. D Malfunction of the air flow sensor
or D Malfunction of the engine-ECU
D Fuel injection correction value remains excessively high for ten seconds or more.

NG
MUT-II Data list Check the intake air temperature sensor system. (Refer to P.13A-
13 Intake air temperature sensor. (Refer to P.13A-75.) 16, INSPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
OK
NG
MUT-II Data list Check the barometric air temperature sensor system. (Refer to
25 Barometric air temperature sensor. (Refer to P.13A-76.) P.13A-22, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
25.)
OK
NG
MUT-II Data list Check the air flow sensor system. (Refer to P.13A-15, INSPEC-
12 Air flow sensor. (Refer to P.13A-75.) TION PROCEDURE FOR DIAGNOSIS CODE 12.)
OK

Replace the fuel pump (high pressure).

13A-36 GDI – Troubleshooting

Code No.91 Electronic-controlled throttle valve system Probable cause

Range of check D Short in communication line
D Ignition switch: ON D Malfunction of the engine-ECU
D Error in communication between the engine-ECU and throttle valve controller D Malfunction of the throttle valve controller
Set conditions
D Output voltage of the throttle position sensor (2nd channel) fluctuates significantly
(approx. 1 V or more) from an expected value.
Range of check
D Ignition switch: ON
D Error in communication between the throttle valve controller and engine-ECU
Set conditions
D The throttle valve opening angle (voltage) which the engine-ECU requested of
the throttle valve controller is significantly different from output voltage of the
(2nd channel) throttle position sensor (approx. one volt).

Yes
MUT-II Self-Diag code Follow INSPECTION PROCEDURE FOR DIAGNOSIS CODE.
Is any other diagnosis code than No.94 output?
No
NG
Check the harness wire between the throttle valve controller and Repair
engine-ECU.
OK

Replace the throttle valve controller.

Code No.92 Throttle valve position feedback system Probable cause

The throttle valve controller determines if a failure is present, and sends its result D Malfunction of the throttle position sensor (1st channel)
to the engine-ECU. D Open circuit or short-circuited harness wire in the
Range of check throttle position sensor system (1st channel), or poor
D Ignition switch: ON connector contact
D System voltage: 8 V or more D Malfunction of the throttle valve controller
Set condition
D Motor position feedback system is defective (System detects a motor overcurrent,
or that actual and projected opening angles of the throttle position sensor (1st
channel) are different by 1.0 V or more.

NG
Check the throttle valve control servo. (Refer to P.13A-109.) Replace
OK
NG
Check the following connectors: A-68, B-15 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the throttle valve control servo Repair
and throttle valve controller.
OK

Replace the throttle body.

Check trouble symptom.

NG

Replace the throttle valve controller.

 GDI – Troubleshooting 13A-37
Code No.94 Communication line system with throttle valve Probable cause
controller
Range of check D Short circuit in communication line
D Ignition switch: ON D Malfunction of the engine-ECU
D System voltage: 8 V or more D Malfunction of the throttle valve controller
D Engine: not cranking
Set condition
D System detects an error in communication line between the engine-ECU and
throttle valve controller.

NG
Check the following connectors: B-15, B-30 Repair
OK

Check trouble symptom.

NG
OK
Check the harness wire between the engine-ECU and throttle Replace the throttle valve controller.
valve controller.
NG
Check trouble symptom.
Repair
NG

Replace the engine-ECU.

Code No.95 Malfunction in throttle valve control servo Probable cause

motor system (1st phase)
Range of check D Malfunction of the throttle valve control servo
D Throttle valve control servo relay: ON D Open circuit or short-circuited harness wire in throttle
D System voltage: 8 V or more valve control servo system, or poor connector contact
Set conditions D Malfunction of the throttle valve controller
D Throttle valve control servo drive circuit is shorted to earth.
D Other power source interferences with throttle valve control servo drive circuit.
D Throttle valve control servo drive circuit is open circuit.

NG
Check the throttle valve control servo. (Refer to P.13A-109.) Replace
OK
NG
Check the following connectors: B-15, A-68 Repair
OK

Check trouble symptom.

NG
OK
Check the harness wire between the throttle valve control servo Replace the throttle valve controller.
and throttle valve controller.
NG

Repair
13A-38 GDI – Troubleshooting

Code No.99 Malfunction in throttle valve control servo Probable cause

motor system (2nd phase)
Range of check D Malfunction of the throttle valve control servo
D Throttle valve control servo relay: ON D Open circuit or short-circuited harness wire in the
D System voltage: 8V or more throttle valve control servo system, or poor connector
Set conditions contact
D Throttle valve control servo drive circuit is shorted to earth. D Malfunction of the throttle valve controller
D Other power source interferes with throttle valve control servo drive circuit.
D Throttle valve control servo drive circuit is open-circuited.

NG
Check the throttle valve control servo. (Refer to P.13A-109.) Replace
OK
NG
Check the following connectors: A-68, B-15 Repair
OK

Check trouble symptom.

NG
OK
Check the harness wire between the throttle valve control servo Replace the throttle valve controller.
and throttle valve controller.
NG

Repair
 GDI – Troubleshooting 13A-39
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom Inspection Reference page
procedure
No.

Communication Communication with all systems is not possible. 1 13A-41

with MUT-II is
impossible. Communication with engine-ECU only is not possible. 2 13A-42

Engine warning The engine warning lamp does not illuminate right after the 3 13A-43
lamp and ignition switch is turned to the ON position.
related parts
The engine warning lamp remains illuminating and never goes 4 13A-43
out.

Starting No initial combustion (starting impossible) 5 13A-44

Initial combustion but no complete combustion 6 13A-46

(starting impossible)

Long time to start (improper starting)

Idling stability Unstable idling (Rough idling, hunting) 7 13A-48

(Improper idling)
Idling speed is high. (Improper idling speed) 8 13A-50

Idling speed is low. (Improper idling speed)

Idling stability When the engine is cold, it stalls at idling. (Die out) 9 13A-51
(Engine stalls)
When the engine is hot, it stalls at idling. (Die out) 10 13A-52

The engine stalls when starting the car. (Pass out) 11 13A-54

The engine stalls when decelerating. 12 13A-55

Driving Hesitation, sag or stumble 13 13A-56

Poor acceleration

Surge

The feeling of impact or vibration when accelerating 14 13A-57

The feeling of impact or vibration when decelerating 15 13A-58

Knocking 16 13A-58

Dieseling 17 13A-58

Too high CO and HC concentration when idling 18 13A-59

Low alternator output voltage (approx. 12.3 V) 19 13A-61

Engine idle speed is incorrect while the A/C is on. 20 13A-61

Fans (radiator fan, A/C condenser fan) are inoperative 21 13A-62

GDI ECO lamp The GDI ECO lamp does not illuminate. 22 13A-63
system
The GDI ECO lamp remains on (does not extinguish). 23 13A-64

Malfunction of the clutch switch system 24 13A-64

13A-40 GDI – Troubleshooting

PROBLEM SYMPTOMS TABLE (FOR YOUR INFORMATION)

Items Symptom

Starting Won’t start The starter is used to crank the engine, but there is no combustion within the
cylinders, and the engine won’t start.

Fires up and dies There is combustion within the cylinders, but then the engine soon stalls.

Hard starting Engine starts after cranking a while.

Idling Hunting Engine speed doesn’t remain constant; changes at idle.

stability
Rough idle Usually, a judgement can be based upon the movement of the tachometer
pointer, and the vibration transmitted to the steering wheel, shift lever, body, etc.
This is called rough idle.

Incorrect idle speed The engine doesn’t idle at the usual correct speed.

Engine stall The engine stalls when the foot is taken from the accelerator pedal, regardless
(Die out) of whether the vehicles is moving or not.

Engine stall The engine stalls when the accelerator pedal is depressed or while it is being
(Pass out) used.

Driving Hesitation, Sag “Hesitation” is the delay in response

Hesitation
of the vehicle speed (engine speed) Normal
that occurs when the accelerator is
depressed in order to accelerate Vehicle Initial ac-
from the speed at which the vehicle speed celerator
pedal de-
is now traveling, or a temporary drop pression
in vehicle speed (engine speed) Sag
during such acceleration.
Serious hesitation is called “sag”.

Time

Poor acceleration Poor acceleration is inability to obtain an acceleration corresponding to the

degree of throttle opening, even though acceleration is smooth, or the inability
to reach maximum speed.

Stumble Engine speed increase is delayed

when the accelerator pedal is
initially depressed for accelera-
tion. Vehicle
speed Normal
Initial ac-
celerator
pedal de-
pression

Idling Stumble

Time
 GDI – Troubleshooting 13A-41

Items Symptom

Driving Shock The feeling of a comparatively large impact or vibration when the engine is
accelerated or decelerated.

Surge This is repeated surging ahead during constant speed travel or during variable
speed travel.

Knocking A sharp sound like a hammer striking the cylinder walls during driving and which
adversely affects driving.

Stopping Run on The condition in which the engine continues to run after the ignition switch is
(“Dieseling”) turned to OFF. Also called “Dieseling”.

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

INSPECTION PROCEDURE 1
Communication with MUT-II is not possible. Probable cause
(Communication with all systems is not possible.)
The cause is probably a defect in the power supply system (including earth) for D Malfunction of the connector
the diagnosis line. D Malfunction of the harness wire

NG NG
Measure at the diagnostic connector Check the following connectors: Repair
(16-pin) B-35. B-75, B-81
D Voltage between 16 and earth
OK
OK: Battery voltage
NG
OK Check trouble symptom. Check the harness wire between the
power supply and diagnostic connector
(16 pin), and repair if necessary.

NG
Measure at the diagnostic connector Check the harness wire between the
(16-pin) B-35. diagnostic connector (16-pin) and
D Continuity between 4 and earth earth, and repair if necessary.
D Continuity between 5 and earth
OK: Continuity
OK

Replace the MUT-II.

13A-42 GDI – Troubleshooting

INSPECTION PROCEDURE 2
MUT-II communication with engine-ECU is impossible. Probable cause
One of the following causes may be suspected. D Malfunction of engine-ECU power supply circuit
D No power supply to engine-ECU. D Malfunction of engine-ECU
D Defective earth circuit of engine-ECU. D Open circuit between the engine-ECU and diagnosis
D Defective engine-ECU. connector
D Improper communication line between engine-ECU and MUT-II

NG
Check the following connectors: Repair
B-09, B-19, B-30, B-60X
OK

Check trouble symptom.

NG
NG
Check the harness wire between engine-ECU and diagnosis con- Repair
nector.
OK

Check the engine-ECU power supply and earth circuit system.

(Refer to P.13A-65, INSPECTION PROCEDURE 25.)

NOTE
On vehicles with the multi-center display, if a malfunction cannot be resolved after the procedure above, check
the multi-center display and replace if necessary. (Refer to GROUP 54 – Multi-center display.)
 GDI – Troubleshooting 13A-43
INSPECTION PROCEDURE 3
The engine warning lamp does not illuminate right after Probable cause
the ignition switch is turned to the ON position.
Because there is a burnt-out bulb, the engine-ECU causes the engine warning lamp D Burnt-out bulb
to illuminate for five seconds immediately after the ignition switch is turned to ON. D Defective warning lamp circuit
If the engine warning lamp does not illuminate immediately after the ignition switch D Malfunction of the engine-ECU
is turned to ON, one of the malfunctions listed at right has probably occurred.

NG
MUT-II Data list Check the engine-ECU power supply and earth circuit system.
16 engine-ECU power supply voltage (Refer to P.13A-75.) (Refer to P.13A-65, INSPECTION PROCEDURE 25.)
OK
OK NG
Measure at the engine-ECU connector B-29. Check the following Repair
D Disconnect the connector, and measure at the harness side. connector: B-29
D Earth the terminal No. 36.
OK
OK: The engine warning lamp illuminates.
NG Check trouble symptom.
NG
NG
Check a burnt-out bulb. Replace Replace the engine-ECU.
OK
NG
Measure at the combination meter connector B-01. Check the engine warning lamp power supply circuit, and repair
D Disconnect the connector, and measure at the harness side. if necessary.
D Voltage between 49 and earth (Ignition switch: ON)
OK: System voltage
OK
NG
Check the following connectors: Repair
B-01, B-02, B-19, B-29
OK
NG
Check trouble symptom. Check the harness wire between combination meter and engine-
ECU, and repair if necessary.

INSPECTION PROCEDURE 4
The engine warning lamp remains illuminating and never Probable cause
goes out.
In cases such as the above, the cause is probably that the engine-ECU is detecting D Short-circuit between the engine warning lamp and
a problem in a sensor or actuator, or that one of the malfunctions listed at right has engine-ECU
occurred. D Malfunction of the engine-ECU

Yes
MUT-II Self-Diag code Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES
No
NG
Measure at the combination meter connector B-02. Check the harness wire between combination meter and engine-
D Disconnect the connector, and measure at the harness side. ECU connector, and repair if necessary.
D Disconnect the engine-ECU connector
D Continuity between 4 and earth
OK: No continuity
OK

Replace the engine-ECU.

13A-44 GDI – Troubleshooting

INSPECTION PROCEDURE 5
No initial combustion (starting impossible) Probable cause
This is caused by incorrect fuel supply into the combustion chamber, and improper D Malfunction of the fuel supply system
ignition circuit. Besides that, foreign material may be contaminated in fuel. D Malfunction of the ignition system
D Malfunction of the engine-ECU

NG
Check system voltage while the engine is cranking. Check the battery. (Refer to GROUP 55 – Battery.)
OK: 8 V or more
OK
Yes
MUT-II Self-Diag code Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.
No
NG
MUT-II Data list Check the engine control relay and ignition switch-IG system. (Refer
16 System voltage (Refer to P.13A-75.) to P.13A-66, INSPECTION PROCEDURE 26.)
OK
No
Does the camshaft rotate when the engine is cranking? Check if the timing belt is broken or damaged.
Yes
NG
MUT-II Actuator test Check the fuel pump (low pressure) system. (Refer to P.13A-68,
07 Fuel pump (low pressure) (Refer to P.13A-80.) INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the crank angle sensor system. (Refer to P.13A-19, INSPEC-
22 Crank angle sensor (Refer to P.13A-76.) TION PROCEDURE FOR DIAGNOSIS CODE 22.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system. (Refer to
21 Engine coolant temperature sensor (Refer to P.13A-76.) P.13A-18, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
21.)
OK
NG
MUT-II Data list Check the throttle position sensor (2nd channel) system. (Refer
14 Throttle position sensor (2nd channel) (Refer to P.13A-75.) to P.13A-17, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 14.)
OK
OK
Inspect engine start ability by cranking the engine while the accelera- Clean around the throttle valve. (Refer to P.13A-96.)
tor pedal is slightly depressed.
NG
NG
Check fuel leakage. (Refer to P.13A-102.) Repair
OK
NG
Measure low fuel pressure between the fuel pump (low pressure) Repair
and fuel pump (high pressure). (Refer to P.13A-98.)
OK
NG
Measure at ignition coil connectors A-85, A-86, A-89, A-91. Check abnormal fuel combustion system. (Refer to P.13A-26, IN-
D Connect the connector. SPECTION PROCEDURE FOR DIAGNOSIS CODE 44.)
D Connect a timing light to the No.1 terminal of each connector
in turn.
(Engine cranking)
OK: The timing light flashes.
OK
NG
Check ignition timing while the engine is cranking. Check that the crank angle sensor and timing belt cover are properly
OK: Approx. 5_ BTDC installed.
OK

To the next page

 GDI – Troubleshooting 13A-45
From the previous page
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

D Spark plug
D Compression pressure
D Foreign material (such as water or kerosine) entered the fuel
lines
OK
NG
Check trouble symptoms. Replace the injector.
13A-46 GDI – Troubleshooting

INSPECTION PROCEDURE 6
Initial combustion takes place, but does not complete Probable cause
(start impossible), too long time to start (poor start)
This may be caused by improper spark plug ignition (poor spark), improper mixture D Malfunction of the fuel supply system
during engine cranking, improper fuel pressure. D Malfunction of the fuel pressure sensor
D Malfunction of the ignition system
D Malfunction of the electronic-controlled throttle vale
system
D Malfunction of the engine-ECU

NG
Check system voltage while the engine is cranking. Check the battery. (Refer to GROUP 55 – Battery.)
OK: 8 V or more
OK
Yes
MUT-II Self-Diag code Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.
No
NG
MUT-II Actuator test Check the fuel pump (low pressure) system. (Refer to P.13A-68,
07 Fuel pump (low pressure) (Refer to P.13A-80.) INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the engine coolant temperature system. (Refer to P.13A-
21 Engine coolant temperature sensor (Refer to P.13A-76.) 18, INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)
OK
NG
MUT-II Data list Check the ignition switch-ST system. (Refer to P.13A-66, INSPEC-
18 Cranking signal (Refer to P.13A-76.) TION PROCEDURE 27.)
OK
NG
MUT-II Data list Check an abnormal fuel pressure system. (Refer to P.13A-28, IN-
74 Fuel pressure sensor (Refer to P.13A-78.) SPECTION PROCEDURE FOR DIAGNOSIS CODE 56.)
OK
NG
Check fuel leakage. (Refer to P.13A-102.) Repair
OK
Yes
Is the engine started normally when it is cranked with the accelerator Clean around the throttle valve. (Refer to P.13A-96.)
pedal depressed slightly?
No
NG
MUT-II Data list Check the throttle position sensor (2nd channel) system. (Refer
14 Throttle position sensor (2nd channel) (Refer to P.13A-75.) to P.13A-17, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 14.)
OK
NG
Check ignition timing when the engine is cranked. Check that the crank angle sensor and timing belt cover are properly
OK: approx. 5_ BTDC installed.
OK

To the next page

 GDI – Troubleshooting 13A-47
From the previous page
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

D Spark plug
D Compression pressure
D Foreign material (such as water or kerosine) entered the fuel
lines
OK
NG
Check trouble symptoms. Replace the injector.
13A-48 GDI – Troubleshooting

INSPECTION PROCEDURE 7
Unstable idling (rough idle, hunting) Probable cause
This malfunction is probably caused by a faulty ignition system, improper air/fuel ratio, D Malfunction of the ignition system
a faulty electronic-controlled throttle valve system, improper compression pressure, D Malfunction of the air/fuel ratio control system
etc. As many causes can be suspected, diagnose from easier items. D Malfunction of the electronic-control throttle valve
system
D Improper compression pressure
D Air sucking into the air intake system

Yes
Has the battery been disconnected recently? Warm up the engine, and then let it run at idle for approx. ten
minutes.
No

Yes
MUT-II Self-Diag code Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.
No
Yes
Does the engine idle speed fluctuates excessively (excessive hunt- Clean around the throttle valve. (Refer to P.13A-96.)
ing)?
No
NG
MUT-II Data list Check the throttle position sensor (2nd channel) system. (Refer
14 Throttle position sensor (2nd channel) (Refer to P.13A-75.) to P.13A-17, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 14.)
OK
NG
MUT-II Data list Check the throttle valve position feedback system. (Refer to
79 Throttle position sensor (1st channel) (Refer to P.13A-79.) P.13A-36, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
92.)
OK
NG
MUT-II Data list Check the accelerator pedal position switch system. (Refer to
26 Accelerator pedal position switch (Refer to P.13A-76.) P.13A-67, INSPECTION PROCEDURE 28.)
OK
NG
MUT-II Data list Check the intake air temperature sensor system. (Refer to P.13A-16,
13 Intake air temperature sensor (Refer to P.13A-75.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
OK
NG
MUT-II Data list Check the barometric pressure sensor system. (Refer to P.13A-22,
25 Barometric pressure sensor (Refer to P.13A-76.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-18,
21 Engine coolant temperature sensor (Refer to P.13A-76.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve system. (Refer to P.13A-70,
08 Purge control solenoid valve (Refer to P.13A-80.) INSPECTION PROCEDURE 31.)
OK
NG
MUT-II Data list Check the oxygen sensor system. (Refer to P.13A-14, INSPECTION
11 Oxygen sensor PROCEDURE FOR DIAGNOSIS CODE 11.)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK
NG
MUT-II Data list Measure fuel high-pressure between the fuel pump (high pressure)
11 Oxygen sensor and injector. (Refer to P.13A-98.)
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the
OK NG
engine is idling (wait for four minutes after the engine
started).
Repair
OK

To the next page Check that air is sucked in the air intake system.
D Broken intake manifold gasket
D Damaged vacuum hose
D Damaged air intake hose
 GDI – Troubleshooting 13A-49
From the previous page
OK
NG
MUT-II Data list Check the power steering fluid pressure switch system. (Refer
27 Power steering fluid pressure switch (Refer to P.13A-76.) to P.13A-71, INSPECTION PROCEDURE 32.)
OK
NG
MUT-II Data list Check the A/C switch and A/C relay system. (Refer to P.13A-71,
28 A/C switch (Refer to P.13A-77.) INSPECTION PROCEDURE 33.)
OK
NG
MUT-II Data list Check the M/T oil temperature sensor system. (Refer to P.13A-72,
48 M/T oil temperature sensor (Refer to P.13A-77.) INSPECTION PROCEDURE 34.)
OK
NG
MUT-II Data list Check the stop lamp switch. (Refer to P.13A-73, INSPECTION
67 Stop lamp switch (Refer to P.13A-78.) PROCEDURE 35.)
OK
NG
MUT-II Data list Check the small lamp switch system. (Refer to P.13A-74, INSPEC-
31 Small lamp switch (Refer to P.13A-77.) TION PROCEDURE 36.)
OK
NG
MUT-II Data list Check the EGR valve. (Refer to P.13A-69, INSPECTION PROCE-
68 EGR valve (Refer to P.13A-78.) DURE 30.)
OK
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are properly
installed.
OK

NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Clean around the throttle valve. (Refer to P.13A-96.)

Check trouble symptom.

NG

Check all the following items in that order.

(1) Spark plugs
(2) Exhaust gas emission control system
(3) EGR system
(4) Compression pressure
(5) Foreign material (such as water or kerosine)entered the fuel
line.
(6) Air is sucked in the air intake system, or EGR gas leaks.
D Damaged intake manifold gasket
D Damaged air intake hose
D Damaged vacuum hose
D Faulty EGR valve seat
13A-50 GDI – Troubleshooting

INSPECTION PROCEDURE 8
Idle speed is high or low (Improper idling) Probable cause
The cause is probably that the intake air amount during idling is too great or too D Malfunction of the electronic-controlled throttle valve
small. system
D Malfunction of the throttle body

Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the throttle position sensor (2nd channel). (Refer to P.13A-17,
14 Throttle position sensor (2nd channel) (Refer to P.13A-75.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 14.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve. (Refer to P.13A-70, IN-
08 Purge control solenoid valve (Refer to P.13A-80.) SPECTION PROCEDURE 31.)
OK
NG
MUT-II Data list Check the accelerator pedal position switch system. (Refer to
26 Accelerator pedal position switch (Refer to P.13A-76.) P.13A-67, INSPECTION PROCEDURE 28.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-18,
21 Engine coolant temperature sensor (Refer to P.13A-76.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)
OK
NG
MUT-II Data list Check the A/C switch and A/C relay system. (Refer to P.13A-71,
28 A/C switch (Refer to P.13A-77.) INSPECTION PROCEDURE 33.)
OK
NG
MUT-II Data list Check the M/T oil temperature sensor. (Refer to P.13A-72, INSPEC-
48 M/T oil temperature sensor (Refer to P.13A-77.) TION PROCEDURE 34.)
OK
NG
MUT-II Data list Check the stop lamp switch system. (Refer to P.13A-73, INSPEC-
67 Stop lamp switch (Refer to P.13A-78.) TION PROCEDURE 35.)
OK

D Clean around the throttle valve. (Refer to P.13A-96.)

D Adjust the throttle position sensor. (Refer to P.13A-96.)
 GDI – Troubleshooting 13A-51
INSPECTION PROCEDURE 9
When the engine is cold, it stalls at idling. (Die out) Probable cause
The cause is probably an incorrect air/fuel ratio or poor intake air amount when the D Malfunction of the electronic-control throttle valve
engine is cold. system
D Malfunction of the throttle body

Yes
Have the battery terminals been disconnected recently? Warm up the engine, and then let it run at idle for approx. ten
No minutes.
Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
Yes
Is the engine idling correct after the engine has been warmed up? Refer to “Unstable idling (rough idle, hunting).” (Refer to P.13A-48,
INSPECTION PROCEDURE 7.)
No
NG
MUT-II Data list Check the throttle valve position feedback system. (Refer to
22 Crank angle sensor (Refer to P.13A-76.) P.13A-36, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
Check idling speed when the engine is cold. 92.)
OK
NG
MUT-II Data list Check the accelerator position switch. (Refer to P.13A-67, INSPEC-
26 Accelerator pedal position switch (Refer to P.13A-76.) TION PROCEDURE 28.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-18,
21 Engine coolant temperature sensor (Refer to P.13A-76.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)
OK
NG
MUT-II Data list Check the EGR valve system. (Refer to P.13A-70, INSPECTION
68 EGR valve (Refer to P.13A-78.) PROCEDURE 31.)
OK
Yes
Does the engine stall immediately after the accelerator pedal is Clean around the throttle valve. (Refer to P.13A-96.)
released?
No
NG
Measure fuel high pressure between the fuel pump (high pressure) Repair
and injector. (Refer to P.13A-98.)
OK
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are properly
installed.
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

D Spark plugs
D Compression pressure
D Engine oil viscosity
OK
NG
Check trouble symptoms. Replace the injector.
13A-52 GDI – Troubleshooting

INSPECTION PROCEDURE 10
When the engine is hot, it stalls at idling. (Die out) Probable cause
The cause is probably an improper air/fuel ratio, faulty electronic-controlled throttle D Malfunction of the ignition system
valve system, compression pressure. In addition, if the engine stalls suddenly, another D Malfunction of the air/fuel ratio control system
possible cause might be a poor connector contact. D Malfunction of the electronic-controlled throttle valve
system
D Malfunction of the throttle body
D Poor connector contact
D Improper compression pressure
D Air stuck in the air intake system

Yes
Have the battery terminals been disconnected recently? Warm up the engine, and then let it run at idle for approx. ten
No minutes.
Yes
MUT-II Self-Diag code Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.
No
NG
MUT-II Data list Check the throttle position sensor (1st channel) system. (Refer
79 Throttle position sensor (1st channel) (Refer to P.13A-79.) to P.13A-34, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 79.)
OK
No
Is it easy to reproduce the engine stall? While carrying out an intermittent malfunction simulation test. (Refer
to GROUP 00 – Points to Note for Intermittent Malfunction.), check
Yes for sudden changes in the following signals.
D Crank angle sensor signal
D Injector drive signal
D Fuel pump (low pressure) drive signal
D Air flow sensor
D Primary ignition signal
D Power supply to the engine-ECU

NG
MUT-II Data list Check the accelerator pedal position switch. (Refer to P.13A-67,
26 Accelerator pedal position switch (Refer to P.13A-76.) INSPECTION PROCEDURE 28.)
OK
NG
MUT-II Data list Check the intake air temperature sensor. (Refer to P.13A-16, IN-
13 Intake air temperature sensor (Refer to P.13A-75.) SPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
OK
NG
MUT-II Data list Check the barometric pressure sensor. (Refer to P.13A-22, IN-
25 Barometric pressure sensor (Refer to P.13A-76.) SPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-18,
21 Engine coolant temperature sensor (Refer to P.13A-76.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)
OK
NG
MUT-II Data list Check the oxygen sensor system. (Refer to P.13A-14, INSPECTION
11 Oxygen sensor PROCEDURE FOR DIAGNOSIS CODE 11.)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK
NG
MUT-II Data list Measure fuel high-pressure between the fuel pump (high pressure)
11 Oxygen sensor and injector. (Refer to P.13A-98.)
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the
OK NG
engine is idling (wait for four minutes after the engine
started).
Repair
OK

To the next page Check that air is sucked in the air intake system.
D Broken intake manifold gasket
D Damaged vacuum hose
D Damaged air intake hose
 GDI – Troubleshooting 13A-53
From the previous page
OK
NG
MUT-II Data list Check the power steering fluid pressure switch system. (Refer
27 Power steering fluid pressure switch (Refer to P.13A-76.) to P.13A-71, INSPECTION PROCEDURE 32.)
OK
NG
MUT-II Data list Check the A/C switch and A/C relay system. (Refer to P.13A-77,
28 A/C switch (Refer to P.13A-77.) INSPECTION PROCEDURE 33.)
OK
NG
MUT-II Data list Check the small lamp switch system. (Refer to P.13A-77, INSPEC-
31 Small lamp switch (Refer to P.13A-77.) TION PROCEDURE 36.)
OK
NG
MUT-II Data list Check the air flow sensor system. (Refer to P.13A-15, INSPECTION
34 Air flow sensor reset signal (Refer to P.13A-77.) PROCEDURE FOR DIAGNOSIS CODE 12.)
OK
NG
MUT-II Data list Check the EGR valve. (Refer to P.13A-77, INSPECTION PROCE-
68 EGR valve (Refer to P.13A-78.) DURE 30.)
OK
Yes
Does the engine stall immediately after the accelerator pedal is Clean around the throttle valve. (Refer to P.13A-96.)
released?
No
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are properly
installed.
OK

NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

D Spark plugs
D Compression pressure
D Foreign material (such as water or kerosine) entered the fuel
lines
13A-54 GDI – Troubleshooting

INSPECTION PROCEDURE 11
The engine stalls when starting the car. (Pass out) Probable cause
The cause is probably poor ignition due to a malfunctioning spark plug (weak spark), D Malfunction of the ignition system
or an incorrect air/fuel ratio when the accelerator is depressed. D Malfunction of the EGR valve
D Air stuck in the air intake system

Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the EGR valve. (Refer to P.13A-69, INSPECTION PROCE-
68 EGR valve (Refer to P.13A-78.) DURE 30.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve system. (Refer to P.13A-70,
08 Purge control solenoid valve (Refer to P.13A-80.) INSPECTION PROCEDURE 31.)
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

(1) Spark plug
(2) Check if air is stuck in the air intake system.
D Damage intake manifold gasket
D Damaged or disconnected vacuum hose
D Damaged air intake hose
 GDI – Troubleshooting 13A-55
INSPECTION PROCEDURE 12
The engine stalls when decelerating. Probable cause
The cause is probably an improper air/fuel ratio due to a faulty EGR system, or poor D Malfunction of the electronic-controlled throttle valve
intake air volume due to a faulty electronic-controlled throttle valve system. system
D Malfunction of the EGR valve

Yes
Have the battery terminals been disconnected recently? Warm up the engine, and then let it run at idle for approx. ten
No minutes.
Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the accelerator pedal position switch. (Refer to P.13A-67,
26 Accelerator pedal position switch (Refer to P.13A-76.) INSPECTION PROCEDURE 28.)
OK
NG
MUT-II Data list Check the throttle valve position feedback system. (Refer to
79 Throttle position sensor (1st channel) (Refer to P.13A-79.) P.13A-36, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
92.)
OK
NG
MUT-II Data list Check the EGR valve system. (Refer to P.13A-69, INSPECTION
68 EGR valve (Refer to P.13A-78.) PROCEDURE 30.)
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

D Spark plug
D Clean around the throttle valve (Refer to P.13A-96.)
13A-56 GDI – Troubleshooting

INSPECTION PROCEDURE 13
Hesitation, sag, stumble, poor acceleration or surge Probable cause
The cause is probably a malfunction of the ignition system, electronic-controlled throttle D Malfunction of the ignition system
valve system, compression pressure, etc. D Malfunction of the air/fuel ratio control system
D Malfunction of the electronic-controlled throttle valve
system
D Improper compression pressure
D Air stuck in the air intake system

Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are properly
installed.
OK
NG
MUT-II Data list Check the accelerator pedal position switch. (Refer to P.13A-77,
26 Accelerator pedal position switch (Refer to P.13A-76.) INSPECTION PROCEDURE 28.)
OK
NG
MUT-II Data list Check the intake air temperature sensor. (Refer to P.13A-16, IN-
13 Intake air temperature sensor (Refer to P.13A-75.) SPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
OK
NG
MUT-II Data list Check the barometric pressure sensor. (Refer to P.13A-22, IN-
25 Barometric pressure sensor (Refer to P.13A-76.) SPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-18,
21 Engine coolant temperature sensor (Refer to P.13A-76.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)
OK
NG
MUT-II Data list Check the throttle valve position feedback system. (Refer to
79 Throttle position sensor (1st channel) (Refer to P.13A-79.) P.13A-36, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
92.)
OK
NG
MUT-II Data list Check the oxygen sensor system. (Refer to P.13A-14, INSPECTION
11 Oxygen sensor PROCEDURE FOR DIAGNOSIS CODE 11.)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK
NG
MUT-II Data list Measure fuel high-pressure between the fuel pump (high pressure)
11 Oxygen sensor and injector. (Refer to P.13A-98.)
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the OK
engine is idling (wait for four minutes after the engine
started). Check that air is sucked in the air intake system.
OK D Broken intake manifold gasket
D Damaged vacuum hose
D Damaged air intake hose

NG
MUT-II Data list Check the EGR valve. (Refer to P.13A-69, INSPECTION PROCE-
68 EGR valve (Refer to P.13A-78.) DURE 30.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve. (Refer to P.13A-70, IN-
08 Purge control solenoid valve (Refer to P.13A-80.) SPECTION PROCEDURE 31.)
OK

To the next page

 GDI – Troubleshooting 13A-57
From the previous page
OK
NG
Measure high fuel pressure between the fuel pump (high pressure) Repair
and injector. (Refer to P.13A-98.)
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK
OK
Check all the following items: Check trouble symptoms.
D Spark plug
D EGR system
D Compression pressure Replace the injector.
D Clogged fuel filter, fuel line

INSPECTION PROCEDURE 14
The feeling of impact when accelerating Probable cause
The cause is probably an ignition leak being generated in line with an increase in D Malfunction of the ignition system
the spark plug request voltage during acceleration.

Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the throttle valve position feedback system. (Refer to
79 Throttle position sensor (1st channel) (Refer to P.13A-79.) P.13A-36, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
92.)
OK
OK
Check ignition coil spark for each cylinder. Check all the following items:
(1) Remove the ignition coil. D Spark plugs
(2) Install a new spark plug to the removed ignition coil. D Ignition current leak
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured. NG
(4) Earth the spark plug electrode securely. Replace the ignition coil.
(5) Check that the spark plug ignites when the engine is cranked.
13A-58 GDI – Troubleshooting

INSPECTION PROCEDURE 15
The feeling of impact when decelerating Probable cause
The cause is probably insufficient intake air due to a faulty electronic-controlled throttle D Malfunction of the electronic-controlled throttle valve
valve system. system

Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the throttle valve position feedback system. (Refer to
79 Throttle position sensor (1st channel) (Refer to P.13A-79.) P.13A-36, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
92.)
OK

NG
MUT-II Data list Check the accelerator pedal position switch system. (Refer to
26 Accelerator pedal position switch (Refer to P.13A-76.) P.13A-67, INSPECTION PROCEDURE 28.)
OK

Clean around the throttle valve. (Refer to P.13A-96.)

INSPECTION PROCEDURE 16
Knocking Probable cause
The cause is probably incorrect detonation control or improper heat range of the D Malfunction of the detonation sensor
spark plugs. D Improper heat range of the spark plugs

Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
No
Does knocking occur when the vehicle is driven with the detonation Check the detonation sensor system. (Refer to P.13A-23, INSPEC-
sensor disconnected? TION PROCEDURE FOR DIAGNOSIS CODE 31.)
(At this time, use the MUT-II to check whether the ignition timing
is retarded from when the detonation sensor connector is con-
nected.)
Yes

Check all the following items:

D Spark plug
D Foreign material (such as water or kerosine) entered the fuel
lines

INSPECTION PROCEDURE 17
Run-on (dieseling) Probable cause
The cause is probably fuel leak from injector(s) D Malfunction of the injector

Replace the injector.

 GDI – Troubleshooting 13A-59
INSPECTION PROCEDURE 18
To high CO and HC concentration when idling Probable cause
The cause is probably an incorrect air/fuel ratio D Malfunction of the air/fuel ratio control system
D Deterioration of the catalyst

Yes
MUT-II Self-Diag code (Refer to P.13A-13, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are properly
installed.
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-18,
21 Engine coolant temperature sensor (Refer to P.13A-76.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)
OK
NG
MUT-II Data list Check the intake air temperature sensor. (Refer to P.13A-16, IN-
13 Intake air temperature sensor (Refer to P.13A-75.) SPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
OK
NG
MUT-II Data list Check the barometric pressure sensor. (Refer to P.13A-22, IN-
25 Barometric pressure sensor (Refer to P.13A-76.) SPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
OK
NG
MUT-II Data list Check the oxygen sensor system. (Refer to P.13A-14, INSPECTION
11 Oxygen sensor PROCEDURE FOR DIAGNOSIS CODE 11.)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK
OK
MUT-II Data list Replace the oxygen sensor.
11 Oxygen sensor
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the
engine is idling (wait for four minutes after the engine Check trouble symptom.
started).
NG
NG
NG
Measure fuel high-pressure between the fuel pump (high pressure) Repair
and injector. (Refer to P.13A-98.)
OK

Check ignition coil spark for each cylinder.

(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK NG

Check all the following items: Replace the ignition coil.

D Spark plugs
D EGR system
D Compression pressure
D Clogged fuel filter or line
OK

To the next page

13A-60 GDI – Troubleshooting

From the previous page

OK
NG
MUT-II Data list Check the EGR valve system. (Refer to P.13A-68, INSPECTION
68 EGR valve (Refer to P.13A-78.) PROCEDURE 29.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve system. (Refer to P.13A-70,
08 Purge control solenoid valve (Refer to P.13A-80.) INSPECTION PROCEDURE 31.)
OK

Check trouble symptom.

NG

Replace the injector.

NG
Check trouble symptom. Replace the three-way catalytic converter.
 GDI – Troubleshooting 13A-61
INSPECTION PROCEDURE 19
Low alternator output voltage (approx. 12.3 V) Probable cause
The cause is probably a malfunction of the alternator or one of the problems D Malfunction of the charging system
listed at right. D Open circuit between the alternator G terminal
and the engine-ECU
D Malfunction of the engine-ECU

NG NG
Measure at the alternator connector Measure at the alternator connector Check the harness wire between
A-93. A-93. the alternator and the engine-ECU,
D Connect the connector. (Use the D Disconnect the connector, and and repair if necessary.
test harness MB991519) measure at the harness side.
D Voltage between 1 (black clip) D Disconnect the engine-ECU
and earth connector.
(Engine: Idling) D Continuity between 1 and earth
(Radiator fan: Not operating) OK: No continuity
(Headlamp: OFF → ON)
OK
(Stop lamp: OFF → ON)
(Rear defogger switch: OFF → Check the following connectors:
ON) A-75, B-29
OK: Voltage increases by 0.2 –
3.5 V. OK NG
OK Repair
Check the alternator. (Refer to GROUP
16 – Charging System.) Replace the engine-ECU.

INSPECTION PROCEDURE 20
Idling speed is improper when A/C is operating Probable cause
If the engine-ECU detects that the air conditioner is on, it activates the idle speed D Malfunction of the A/C control system
control (ISC) servo to control idle-up operation. D Improper connector contact, open circuit or
The A/C-ECU judges if the load caused by air conditioner operation is high or low, short-circuited harness wire
and converts it to voltage signal (high or low voltage) and inputs the signal to the D Malfunction of the engine-ECU
engine-ECU.
Based on this voltage signal, the engine-ECU controls the idle-up speed (for high
or low load).

OK
Measure at the engine-ECU connector B-31. Check the following connector:
D Connect the connector. B-16, B-19
D Voltage between 73 and earth (Engine: at idle, outside air OK NG
temperature: 25_C or more)
OK: 0 – 3 V [When A/C is MAX. COOL condition (when Repair
the load by A/C is high)]
System voltage [When A/C is MAX. HOT condition (when
the load by A/C is low)] Check trouble symptom.
NG NG
Check the A/C system. (Refer to GROUP 55 – On-vehicle Service.) Replace the engine-ECU.
13A-62 GDI – Troubleshooting

INSPECTION PROCEDURE 21
Fans (radiator fan, A/C condenser fan) are inoperative. Probable cause
The engine-ECU sends a duty signal to the fan controller according to engine coolant D Malfunction of the fan motor relay
temperature, vehicle speed, or A/C switch load. D Malfunction of the fan motor
The fan controller controls radiator fan and condenser fan speeds, based on this D Malfunction of the fan controller
signal. (The closer the terminal voltage comes to 5 V, the higher the fan speed D Open or short circuit, or poor connector contact
becomes.) D Malfunction of the engine-ECU

NG
Measure at engine-ECU connector A-28. Check the following connector: A-23, A-32
D Disconnect the connector, measure at the harness side. NG
OK
D Voltage between terminal 21 and earth
(Ignition switch: ON) Repair
OK: 4.8 – 5.2 V (The fan runs at high speed.)
D Earth terminal 21.
(Ignition switch: ON)
OK: The fan stops. Check trouble symptom.

OK NG

Check the harness wire between the engine-ECU and fan controller.
Check the following connector: A-28
OK NG
OK NG
Repair
Repair

Check the radiator fan and condenser fan circuit. (Refer to GROUP
Check trouble symptom. 14 – Troubleshooting.)
NG
NG
MUT-II Data list Check the engine coolant temperature sensor system. (Refer to
21 Engine coolant temperature sensor P.13A-18, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
OK: After the engine has been warmed up, the engine coolant 21.)
temperature during idling is identical to the MUT-II reading.
OK
NG
Check the thermostat. Replace
OK

Replace the engine-ECU.

 GDI – Troubleshooting 13A-63
INSPECTION PROCEDURE 22
The GDI ECO lamp does not illuminate. Probable cause
If the GDI ECO lamp does not illuminate after turning on the ignition switch, the D Burned-out GDI ECO lamp bulb
causes listed in the right column are suspected. D Open circuit or short-circuited harness wire in the
GDI ECO lamp circuit
D Malfunction of the engine-ECU

NG
MUT-II Data list Check the engine-ECU power source and earth circuits.
16 System voltage (Refer to P.13A-75.) (Refer to P.13A-65, INSPECTION PROCEDURE 25.)
OK
OK
Measure at engine-ECU connector B-28. Check the following connector: B-28
D Disconnect the connector, and measure at the harness side. OK NG
D Earth terminal 3.
(Ignition switch: ON) Repair
OK: The GDI ECO lamp illuminates
NG
Check trouble symptom.
Check a burned-out bulb. NG
OK NG
Replace the engine-ECU.
Replace

OK
Measure at combination meter B-01. Check the following connectors: B-01, B-02, B-19, B-29
D Disconnect the connector, and measure at the harness side. OK NG
D Voltage between 49 and earth
(Ignition switch: ON) Repair
OK: System voltage
NG
Check trouble symptom.
Check the GDI ECO lamp circuit, and repair if necessary. NG

Check the harness wire between the combination meter and en-
gine-ECU, and repair if necessary.
13A-64 GDI – Troubleshooting

INSPECTION PROCEDURE 23
The GDI ECO lamp remains on (does not extinguish). Probable cause
If the GDI ECO lamp does not extinguish during high load operation, the causes D Short circuit between the GDI ECO lamp and
listed in the right column are suspected. engine-ECU
D Malfunction of the engine-ECU

NG
Measure at combination meter connector B-02. Check the harness wire between the combination meter and en-
D Disconnect the connector, and measure at the harness side. gine-ECU, and repair if necessary.
D Disconnect the engine-ECU connector.
D Continuity between terminal 11 and earth
OK: No continuity
OK

Replace the engine-ECU.

INSPECTION PROCEDURE 24
Malfunction of the clutch switch system Probable cause
When the clutch pedal is depressed, the clutch switch sends a signal to the D Malfunction of the clutch switch
engine-ECU, and the engine-ECU controls the fuel injection properly based on D Open circuit or short-circuited harness wire in the
this signal. Due to this, engine speed fluctuation is reduced at shifting. clutch switch circuit
D Malfunction of the engine-ECU

NG
Check the clutch switch. (Refer to Replace
P.13A-109.)
OK
(1) NG NG
Measure at the clutch switch connector Check the harness wire between the Repair
B-68. engine-ECU and the clutch switch con-
D Disconnect the connector, and nector.
measure at the harness side. OK
(1) Voltage between 2 and earth
(Ignition switch: ON) Replace the engine-ECU.
OK: System voltage
(2) Continuity between 1 and earth (2) NG
OK: Continuity Check the harness wire between the
OK clutch switch connector and the earth,
and repair if necessary.
Check the following connectors:
B-68
OK NG

Repair

Check the trouble symptoms.

NG

Replace the engine-ECU.

 GDI – Troubleshooting 13A-65
INSPECTION PROCEDURE 25
Engine-ECU power supply and earth circuit system Probable cause
The cause is probably a malfunction of the engine-ECU or one of the problems D Open circuit or short-circuited harness wire in the
listed at right. engine-ECU power supply circuit
D Open circuit or short-circuited harness wire in the
engine-ECU earth circuit
D Malfunction of the engine-ECU

(1) NG NG
Measure at the engine-ECU connectors Check the following connector: Repair
B-28, B-29, B-31. B-18
D Disconnect the connector, and
OK
measure at the harness side.
(1) Voltage between 82 and earth NG
Check the trouble symptoms. Check the harness wire between the
(Ignition switch: ON) engine-ECU and ignition switch, and
OK: System voltage (2),(3) NG repair if necessary.
(2) Voltage between 38 and earth Check the harness wire between the
OK: System voltage engine-ECU and engine control relay, OK NG
(3) Voltage between 12, 25 and and repair if necessary.
earth (Ignition switch: ON) Repair
OK: System voltage (When ter- (4) NG
minal 38 is shorted to Check the harness wire between the
Check the ignition switch. (Refer to
earth) engine-ECU and earth, and repair if
GROUP 54.)
(4) Continuity between 13, 26 and necessary.
earth
OK: Continuity (5) NG NG
Check the following connectors: Repair
(5) Voltage between 80 and earth
B-18, B-45
OK: System voltage
OK OK
NG
Check the following connectors: Check the trouble symptoms. Check the harness wire between the
B-28, B-29, B-31 engine-ECU and the battery, and repair
if necessary.
OK NG

Repair

Check the trouble symptoms.

NG

Replace the engine-ECU.

13A-66 GDI – Troubleshooting

INSPECTION PROCEDURE 26
Engine control relay and ignition switch-IG system Probable cause
When the ignition switch ON signal is input to the engine-ECU, the D Malfunction of the ignition switch
engine-ECU turns on the engine control relay. D Malfunction of the engine control relay
This causes system voltage to be supplied to the engine-ECU and to the D Open circuit or short-circuited harness wire of the
sensors and actuators. engine control relay circuit
D Malfunction of the engine-ECU

NG
Check the engine control relay. (Refer Replace
to P.13A-105.)
OK
NG NG
Measure at the engine control relay Check the following connector: Repair
connector B-26. A-23
D Disconnect the connector, and OK
measure at the harness side.
D Voltage between 3, 4 and earth NG
Check the trouble symptoms. Check the harness wire between the
OK: System voltage battery and the engine control relay,
OK and repair if necessary.

Check the engine-ECU power supply

and earth circuit system. (Refer to
P.13A-65, INSPECTION PROCE-
DURE 25.)

INSPECTION PROCEDURE 27
Ignition switch-ST system Probable cause
The ignition switch-ST outputs a HIGH signal to the engine-ECU while the D Malfunction of the ignition switch
engine is cranking. D Open circuit or short-circuited harness wire of the
The engine-ECU uses this signal to carry out functions such as fuel injection ignition switch circuit
control during starting. D Malfunction of the engine-ECU

(1) NG NG
Measure at the engine-ECU connector Check the following connectors: Repair
B-31. A-75, B-18
D Disconnect the connector, and OK
measure at the harness side.
(1) Voltage between 71 and earth NG
Check the trouble symptoms. Check the harness wire between the
(Ignition switch: START) engine-ECU and the ignition switch.
OK: 8 V or more (2) NG
(2) Continuity between 91 and earth Check the harness wire between the OK NG
OK: Continuity engine-ECU connector (terminal
No.91) and earth, and repair if neces- Repair
OK sary.
NG
Check the following connector: Repair Check the ignition switch. (Refer to
B-31 GROUP 54.)
OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

 GDI – Troubleshooting 13A-67
INSPECTION PROCEDURE 28
Accelerator pedal position switch system Probable cause
The accelerator pedal position switch detects that the accelerator pedal is fully closed, D Maladjustment of the accelerator cable
and sends a signal to the engine-ECU. The engine-ECU judges if the accelerator D Maladjustment of the accelerator pedal position switch
pedal position sensor is faulty, based on this signal. D Open circuit or short-circuited harness wire in the
accelerator pedal position switch system, or poor
connector contact
D Malfunction of the engine-ECU

NG
Check the accelerator pedal position switch. (Refer to P.13A-107.) Replace the accelerator pedal position sensor assembly.
OK
NG
Measure at accelerator pedal position sensor (1st channel) connec- Check the following connector: B-30, B-31
tor A-84. NG
OK
D Disconnect the connector, and measure at the harness side.
D Voltage between terminal 4 and earth Repair
(Ignition switch: ON)
OK: 4 V or more
D Continuity between terminal 1 and earth
OK: Continuity Check trouble symptom.
NG
OK
Check the harness wire between the engine-ECU and accelerator
pedal position sensor (1st channel).
OK NG
NG
Check the following connector: A-84 Repair Repair
OK
NG
Check trouble symptom. Replace the engine-ECU.
13A-68 GDI – Troubleshooting

INSPECTION PROCEDURE 29
Fuel pump (low pressure) system Probable cause
The engine-ECU turns on the fuel pump relay while the engine is cranking or D Malfunction of the fuel pump relay
running, and supplies power source to the fuel pump (low pressure). D Malfunction of the fuel pump (low pressure)
D Open circuit or short-circuited harness wire in the fuel
pump (low pressure) circuit, or poor connector contact
D Malfunction of the engine-ECU

OK
MUT-II Actuator test Normal
07 Fuel pump (Refer to P.13A-80.)
NG
NG
Check the fuel pump relay. (Refer to Replace
P.13A-105.)
OK
NG NG
Measure at fuel pump relay connector Check the following connector: Repair
B-27. B-18
D Disconnect the connector, and
OK
measure at the harness side.
D Voltage between terminals 3, 4 and NG
Check trouble symptom. Check the harness wire between the
earth fuel pump relay and ignition switch.
(Ignition switch: ON)
OK: System voltage OK NG
OK Repair
NG
Measure at engine-ECU connector Check the following connector:
B-28. B-27 Check the ignition switch. (Refer to
D Disconnect the connector, and GROUP 54 – Ignition Switch.)
OK NG
measure at the harness side.
D Voltage between terminal 22 and Repair
earth (Ignition switch: ON)
OK: System voltage NG
Check trouble symptom. Check the harness wire between the
OK fuel pump relay and engine-ECU, and
repair if necessary.
OK NG
Measure at engine-ECU connector Check the following connector: Repair
B-28. B-28
D Disconnect the connector, and
OK
measure at the harness side.
D Short circuit between terminal 22 NG
Check trouble symptom. Replace the engine-ECU.
and earth (Ignition switch: ON)
OK: The fuel pump operates (its
operation sound can be
heard).
NG
(1) NG NG
Measure at fuel pump (low pressure) Check the following connectors: Repair
connector D-13. B-18, B-27, D-15
D Disconnect the connector, and OK
measure at the harness side.
(1) Voltage between terminal 5 and NG
Check trouble symptom. D Check the harness wire between
earth the fuel pump relay and fuel pump
(Ignition switch: ON) (low pressure), and repair if
OK: System voltage necessary.
(2) Continuity between 4 and earth (2) NG D Check the harness wire between
OK: Continuity Check the following connector:
D-15 the fuel pump and fuel pump drive
OK connector, and repair if necessary.
OK NG

Repair
NG
Check trouble symptom. Check the harness wire between the
NG fuel pump (low pressure) and earth,
Check the following connector: Repair and repair if necessary.
D-13
OK

Check trouble symptom.

NG

Replace the fuel pump (low pressure).

 GDI – Troubleshooting 13A-69
INSPECTION PROCEDURE 30
EGR valve (stepper motor) system Probable cause
The engine-ECU controls the EGR valve (stepper motor) in order to control the D Malfunction of the EGR valve
amount of exhaust gas mixed in the intake air. D Open circuit or short-circuited harness wire in the
EGR valve circuit
D Malfunction of the engine-ECU

NG
Check the EGR valve. (Refer to GROUP Replace
17 – Emission Control System.)
OK
NG NG
Measure at the EGR valve connector Check the following connector: Repair
A-62. A-65
D Disconnect the connector, and OK
measure at the harness side.
D Voltage between 2, 5 and earth NG
Check the trouble symptoms. Check the harness wire between the
(Ignition switch: ON) engine control relay and the EGR valve,
OK: System voltage and repair if necessary.
OK
NG NG
Measure at the engine-ECU connector Check the following connectors: Repair
B-29. A-62, A-65
D Disconnect the connector, and OK
measure at the harness side.
D Voltage between 31, 32, 39, 40 NG
Check the trouble symptoms. Check the harness wire between the
and earth (Ignition switch: ON) engine-ECU and EGR valve, and repair
OK: System voltage if necessary.
OK
NG
Check the following connector: Repair
B-29
OK
NG
Check the trouble symptoms. Replace the engine-ECU.
13A-70 GDI – Troubleshooting

INSPECTION PROCEDURE 31
Purge control solenoid valve system Probable cause
The engine-ECU controls the purge control solenoid valve in order to control D Malfunction of the purge control solenoid valve
the purge air coming from the canister. D Open circuit or short-circuited harness wire in the
purge control solenoid valve circuit
D Malfunction of the engine-ECU

NG
Check the purge control solenoid valve. Replace
(Refer to GROUP 17 – On-vehicle Ser-
vice.)
OK
NG
Measure at the purge control solenoid Check the harness wire between
valve connector A-58. the engine control relay and the
D Disconnect the connector, and purge control solenoid valve, and
measure at the harness side. repair if necessary.
D Voltage between 2 and earth
(Ignition switch: ON)
OK: System voltage
OK
NG NG
Measure at the engine-ECU connector Check the following connector: Repair
B-28. A-58
D Disconnect the connector, and OK
measure at the harness side.
D Voltage between 55 and earth NG
Check the trouble symptoms. Check the harness wire between the
(Ignition switch: ON) engine-ECU and the purge control sole-
OK: System voltage noid valve, and repair if necessary.
OK
NG
Check the following connector: Repair
B-28
OK
NG
Check the trouble symptoms. Replace the engine-ECU.
 GDI – Troubleshooting 13A-71
INSPECTION PROCEDURE 32
Power steering fluid pressure switch system Probable cause
The power steering fluid pressure switch sends a signal to the engine-ECU according D Malfunction of the power steering fluid pressure switch
to power steering load. D Open circuit or short-circuited harness wire in the
Based on this signal, the engine-ECU controls the throttle control servo so that power steering fluid pressure switch circuit, or poor
idle speed increases when the power steering is in operation. connector contact
D Malfunction of the engine-ECU

NG
Check the power steering fluid pressure switch. (Refer to GROUP Replace
37A – On-vehicle Service.)
OK
NG
Measure at power steering fluid pressure switch connector A-38. Check the following connectors: A-23, B-29
D Disconnect the connector, and measure at the harness side. OK NG
D Voltage between terminal 1 and earth
(Ignition switch: ON) Repair
OK: System voltage
OK
Check trouble symptom.
Check the following connector: A-38
NG
OK NG
Check the harness wire between the engine-ECU and power steer-
Repair ing fluid pressure switch.
OK NG

Repair

NG
Check trouble symptom. Replace the engine-ECU.

INSPECTION PROCEDURE 33
A/C switch and A/C relay system Probable cause
If the engine-ECU receives a ‘A/C on’ signal, it operates the throttle control servo D Malfunction of the A/C control system
and A/C compressor magnetic clutch so that idle speed increases. D Malfunction of the A/C switch
D Open circuit or short-circuited harness wire in the
A/C switch circuit, or poor connector contact
D Malfunction of the engine-ECU

NG
Service the A/C compressor relay. (Refer to GROUP 55 – On-ve- Replace
hicle Service.)
OK
OK
Measure at engine-ECU connectors B-28, B-29. Check the following connectors: B-28, B-29
D Disconnect the connector, and measure at the harness side. NG
OK
D Voltage between terminals 8, 45 and earth
(Ignition switch: ON) Repair
OK: 0 – 3 V
(A/C switch: OFF)
System voltage
(A/C switch: ON) Check trouble symptom.
D Connect terminal 8 to earth. NG
(Ignition switch: ON, A/C switch: ON)
OK: A/C compressor clutch turns on. Replace the engine-ECU.
NG

Check the A/C system. (Refer to GROUP 55 – On-vehicle Service.)

13A-72 GDI – Troubleshooting

INSPECTION PROCEDURE 34
M/T oil temperature sensor system Probable cause
This sensor inputs the manual transmission oil temperature to the engine-ECU. D Malfunction of the M/T oil temperature sensor
The engine-ECU uses this input to control the idle speed control servo so that D Open circuit or short-circuited harness wire in the
the idle speed is increased when the manual transmission oil temperature M/T oil temperature sensor circuit
becomes low. D Malfunction of the engine-ECU

NG
Check the M/T oil temperature sensor. (Refer to GROUP 22 – Replace
On-vehicle Service.)
OK
NG
Measure at the M/T oil temperature sensor connector A-80. Check the following connectors: B-30, B-31
D Disconnect the connector, and measure at the harness OK NG
side.
D Voltage between 1 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
D Continuity between 2 and earth
OK: Continuity
Check ttrouble symptom.
OK
NG
Check the following connector: A-80
Check the harness wire between the engine-ECU and the M/T
OK NG oil temperature sensor.

Repair OK NG

Repair

NG
Check the trouble symptoms. Replace the engine-ECU.
 GDI – Troubleshooting 13A-73
INSPECTION PROCEDURE 35
Stop lamp switch system Probable cause
The engine-ECU determines whether the brake pedal is depressed or not, by means D Malfunction of the stop lamp switch
of the stop lamp switch input signal. D Open circuit or short-circuited harness wire in the
stop lamp circuit, or poor connector contact
D Malfunction of the engine-ECU

NG
Check the stop lamp switch. (Refer to GROUP 35 – Brake Pedal.) Replace
OK
NG
Measure at stop lamp switch connector B-39. Check the following connector: B-43
D Disconnect the connector, and measure at the harness side. OK NG
D Voltage between terminal 3 and earth
OK: System voltage Repair
OK

Check trouble symptom.

NG

Check the harness wire between the battery and stop lamp switch.

NG
Measure at engine-ECU connector B-29. Check the following connectors: B-19, B-39, B-61X
D Disconnect the connector, and measure at the harness side. OK NG
D Voltage between terminal 35 and earth
(Ignition switch: ON) Repair
OK: 0 – 3 V (when the brake pedal is not depressed)
System voltage (when the brake pedal is depressed)
OK Check trouble symptom.
NG

Check the harness wire between the engine-ECU and stop lamp,
and repair if necessary.

NG
Check the following connector: B-29 Repair
OK

Check trouble symptom.

NG

Replace the engine-ECU.

13A-74 GDI – Troubleshooting

INSPECTION PROCEDURE 36
Small lamp switch Probable cause
The engine-ECU determines whether the small lamp switch is on or off. D Improper connector contact, open circuit or
According to that information, the engine-ECU controls short-circuited harness wire in the taillamp circuit
alternator output current when the vehicle is started. D Malfunction of the engine-ECU

NG
Measure at the engine-ECU connector B-30. Check the taillamp circuit. (Refer to ELECTRICAL WIRING.)
D Disconnect the connector, and measure at the harness
side.
D Voltage between 52 and earth
(Lighting switch: ON)
OK: System voltage
OK
NG
Check the following connector: B-30 Repair
OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

 GDI – Troubleshooting 13A-75
DATA LIST REFERENCE TABLE
Caution
When shifting the select lever to D range, the brakes should be applied so that the vehicle does
not move forward.
NOTE
*1: Within four minutes after starting the engine
*2: In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10% longer
than the standard time.
*3: The accelerator pedal position switch normally turns off when the voltage of the accelerator pedal
position sensor (1st channel) is 50 – 100 mV higher than the voltage at the idle position. If the accelerator
pedal position switch turns back on after the accelerator pedal position sensor voltage has risen by
100 mV and the throttle valve has opened, the accelerator pedal position switch and the accelerator
pedal position sensor (1st channel) need to be adjusted.
Item Check items Requirements Normal condition Inspection Reference
No. procedure page
No.
11 Oxygen sensor Engine: After warm- Idling 0 mV Code 13A-14
up No 11
No.11
Sudden racing 600 – 1,000 mV

2,500 r/min 400 mV or less and

600 – 1,000 mV
alternates.
12 Air flow sensor D Engine coolant Idling 20 – 55 Hz Code 13A-15
temperature: No.12
80 – 95_C
D Lamps, electric 2,500 r/min 65 – 85 Hz
cooling fan and
all accessories: Racing Frequency in-
OFF creases in response
D Transmission: to racing.
Neutral
13 Intake air tem- Ignition switch: ON Intake air tempera- –20_C Code 13A-16
perature sensor ture: –20_C No.13
Intake air tempera- 0_C
ture: 0_C
Intake air tempera- 20_C
ture: 20_C
Intake air tempera- 40_C
ture: 40_C
Intake air tempera- 80_C
ture: 80_C
14 Throttle position D Engine coolant Release the acceler- 4,200 – 4,800 mV Code 13A-17
sensor (2nd temperature: 80 ator pedal. No.14
channel) – 95_C
D Ignition switch: Depress the acceler- Voltage decreases
ON (Engine ator pedal gradually. in response to the
stopped)) pedal depression.
Depress the acceler- 200 – 900 mV
ator pedal fully.
16 Power supply Ignition switch: ON System voltage Procedure 13A-65
voltage No.25
13A-76 GDI – Troubleshooting

Item Check items Requirements Normal condition Inspection Reference

No. procedure page
No.
18 Cranking signal Transmission: Neu- Engine: Stopped OFF Procedure 13A-66
(Ignition switch tral No 27
No.27
– ST) Engine: Cranking ON

21 Engine coolant Ignition switch: ON Intake air tempera- –20_C Code 13A-18
temperature ture: –20_C No.21
sensor
Intake air tempera- 0_C
ture: 0_C
Intake air tempera- 20_C
ture: 20_C
Intake air tempera- 40_C
ture: 40_C
Intake air tempera- 80_C
ture: 80_C
22 Crank angle D Engine: crank- Compare the engine Accord Code 13A-19
sensor ing speed readings on the No.22
D Tachometer: tachometer and the
Connected MUT-II.
D Engine: Idling Engine coolant tem- 1,200 – 1,400 r/min
D Accelerator ped- perature: –20_C
al position
switch: ON Engine coolant tem- 1,100 – 1,300 r/min
perature: 0_C
Engine coolant tem- 1,000 – 1,200 r/min
perature: 20_C
Engine coolant tem- 900 – 1,100 r/min
perature: 40_C
Engine coolant tem- 500 – 700 r/min*1
perature: 80_C
25 Barometric Ignition switch: ON Altitude: 0 m 101 kPa Code 13A-22
pressure sensor No 25
No.25
Altitude: 600 m 95 kPa

Altitude: 1,200 m 88 kPa

Altitude: 1,800 m 81 kPa

26 Accelerator Ignition switch: ON Release the acceler- ON Procedure 13A-67

pedal position (Depress and re- ator pedal. No.28
switch lease the accelerator
pedal several times) Depress the acceler- OFF
ator pedal slightly.
27 Power steering Engine: Idling Steering wheel sta- OFF Procedure 13A-71
fluid pressure tionary No.32
switch
Steering wheel turn- ON
ing
 GDI – Troubleshooting 13A-77
Item Check items Requirements Normal condition Inspection Reference
No. procedure page
No.
28 A/C switch Engine: Idling (The A/C switch: OFF OFF Procedure 13A-71
A/C compressor
com ressor is No.33
running when the A/C A/C switch: ON ON
switch is on.)
31 Small lamp Engine: Idling Lighting switch: OFF OFF Procedure 13A-74
switch No.36
No 36
Lighting switch: ON ON

34 Air flow sensor Engine: After having Engine is idling ON Code 13A-15
reset signal warmed up No 12
No.12
3,000 r/min OFF

37 Volumetric effi- D Engine coolant Engine is idling 15 – 35% – –

ciency
y temperature: 80
– 95_C
D Lamps, electric 2,500 r/min 15 – 35%
cooling fan and
all accessories: Engine is suddenly Volumetric efficien-
OFF raced cy increases in re-
D Transmission: sponse to racing
Neutral
38 Crank angle D Engine: Cranking [reading is possible at Engine speeds dis- – –
sensor 2,000 r/min or less] played on the MUT-
D Tachometer: Connected II and tachometer
are identical.
41 Injector drive D Engine coolant Idling*1 0.5 – 0.7 ms*1 Code 13A-24
time *2 temperature: 80 No.41
95_C
– 95 C
D Lamps, electric 2,500 r/min 0.6 – 0.8 ms
cooling fan and
all accesso
a accessories:
es
OFF
Sudden racing Increases
D Transmission:
Neutral
44 Ignition ad- D Engine: After Idling*1 12 – 20_BTDC *2 Code 13A-26
vance warm-up No.44
No 44
D Set a timing light. 2,500 r/min 20 – 40_BTDC

48 M/T oil tempera- Drive after the engine Drive for 15 minutes Gradually increases Procedure 13A-72
ture sensor has warmed up. or more. to 50 – 90_C. No.34
49 A/C relay Engine: After warm- A/C switch: OFF OFF (compressor Procedure 13A-71
up, idling clutch is not operat- No.33
ing)
A/C switch: ON ON (compressor
clutch is operating)
13A-78 GDI – Troubleshooting

Item Check items Requirements Normal condition Inspection Reference

No. procedure page
No.
66 Brake vacuum D Engine coolant Stop the engine from Displayed pressure Code 13A-31
sensor temperature: 80 idling speed, and increases. No.66
– 95_C then depress the
D Lamps, electric brake pedal several
cooling fan and times with the ignition
all accessories: switch on.
OFF
D Transmission:
Neutral
67 Stop lamp Ignition switch: ON Brake pedal: De- OFF Procedure 13A-71
switch pressed No.33
Brake pedal: Re- ON
leased
68 EGR valve D Engine coolant Idling 5 – 15 STEP Procedure 13A-69
temperature: 80 No.30
– 95_C
D Lamps, electric
cooling fan and
all accessories: 2,500 r/min 0 – 5 STEP
OFF
D Transmission:
Neutral
74 Fuel pressure D Engine coolant Engine: Idling 4 – 7 MPa – –
sensor temperature: 80
– 95_C
D Lamps, electric
cooling fan and
all accessories:
OFF
D Transmission:
Neutral
77 Accelerator Ignition switch: ON Release the acceler- 400 – 900 mV Code 13A-32
pedal position ator pedal. No.77
sensor (2nd
channel) Depress the acceler- Increases in re-
ator pedal gradually. sponse to the pedal
depression stroke.
Depress the acceler- 4,500 – 5,000 mV
ator pedal fully.
78 Accelerator Ignition switch: ON Release the acceler- 400 – 900 mV Code 13A-33
pedal position ator pedal. No.78
sensor (1st
channel) *3 Depress the acceler- Increases in re-
ator pedal gradually. sponse to pedal de-
pression stroke.
Depress the acceler- 4,500 – 5,000 mV
ator pedal fully.
 GDI – Troubleshooting 13A-79
Item Check items Requirements Normal condition Inspection Reference
No. procedure page
No.
79 Throttle position D Engine coolant Release the acceler- 400 – 600 mV Code 13A-34
sensor (1st temperature: 80 ator pedal. No.79
channel) – 95_C
D Ignition switch: Depress the acceler- Increases in re-
ON (Engine ator pedal gradually. sponse to pedal de-
stopped)) pression stroke.
Depress the acceler- 3,900 – 4,900 mV
ator pedal fully.
Engine: After warm- No load 450 – 1,000 mV
up idling
up,
A/C switch: OFF → Increases by 100 –
ON 600 mV.
Selector lever: N → Increases by 0 – 200
D range mV.
99 Fuel injection Engine: After warm Idling (for several Lean compression – –
mode up minutes after engine
start)
2,500 r/min Stoichio metric
feedback
Sudden racing after Open loop
idle position
13A-80 GDI – Troubleshooting

ACTUATOR TEST REFERENCE TABLE

Item Inspection Drive contents Inspection contents Normal condition Inspection Reference
No. item procedure page
No.

01 Injectors Cut fuel to No. 1 Engine: Idling condition Code No. 13A-24
injector After having becomes different 41
warmed up/Engine (becomes unsta-
unsta
02 Cut fuel to No. 2 is idling ble).
injector (Cut the fuel supply
su ly
to each injector in
03 Cut fuel to No. 3
turn and check
injector
cylinders which
04 Cut fuel to No. 4 don’t affect idling.)
injector
07 Fuel pump Fuel pump Ignition switch: ON Sound of opera- Procedure 13A-68
(low pressure) operates and tion is heard. No. 29
fuel is recirculated.

08 Purge Solenoid valve Ignition switch: ON Sound of opera- Procedure 13A-70

control turns from OFF to tion can be heard No. 31
solenoid valve ON. when solenoid
valve is
driven.

17 Basic ignition Set the engine- Idling after engine 5_BTDC – –

timing ECU to ignition warm up
timing adjustment
mode

21 Fan controller Drive the fan motor Ignition switch: ON The fan motor Procedure 13A-62
operates No.21
34 Electronic- Close the throttle Ignition switch: ON Operation sound Code 13A-36
controlled valve fully can be heard No.91
throttle valve
system
 GDI – Troubleshooting 13A-81
CHECK AT THE ENGINE-ECU TERMINALS
TERMINAL VOLTAGE CHECK CHART
Engine-ECU Connector Terminal Arrangement

Terminal Check item Check requirements (engine condition) Normal condition

No.

1 No.1 injector Engine: Warm up, and then depress decreases slightly for short
the accelerator pedal suddenly from time from 9 – 13 V.
V
14 No.2 injector the idle speed.

2 No.3 injector

15 No.4 injector

3 GDI ECO lamp Constant speed driving at 40 km/h 0–3V

Engine: Depress the accelerator pedal System voltage

suddenly from the idle speed.

5 Purge control solenoid valve D Engine cool- Engine: stopped System voltage
ant tempera-
ture: 80 – Engine: Start the Voltage decreases.
95_C engine, and then
D Ignition increase engine
switch: ON speed up to 3,500
r/min.
6 Oxygen sensor heater Engine: idling 0–3V

Engine: 3,500 r/min System voltage

8 A/C relay D Engine: idling System voltage, or changes

D A/C switch: OFF → ON from momentarily 6 V or
(Compressor is operating) more to 0 → 3 V

10 No.1 ignition coil Engine: 3,000 r/min 0.1 – 2.0 V

11 No.2 ignition coil

23 No.3 ignition coil

24 No.4 ignition coil

12 Power supply Ignition switch: ON System voltage

25

16 Throttle valve control servo Ignition switch: OFF 0 – 0.3 V

relay
Ignition switch: ON 0.5 – 1.0 V

19 Air flow sensor reset signal Engine: idling 0–1V

Engine: 3,000 r/min 6–9V

13A-82 GDI – Troubleshooting

Terminal Check item Check requirements (engine condition) Normal condition

No.
20 Injector driver relay Ignition switch: OFF 0 – 0.1 V

Ignition switch: ON 0.5 – 1.0 V

21 Fan controller Radiator and condenser fans are not 0 – 0.3 V

operating.

Radiator and condenser fans are 0.7 V or more

operating.

22 Fuel pump relay Ignition switch: Engine: stopped System voltage

ON
Engine: Idling 0–3V

31 EGR valve (C) Ignition switch: immediately after 5 – 8 V (fluctuates for

turning ON approx.
approx three seconds)
32 EGR valve (D)

39 EGR valve (A)

40 EGR valve (B)

33 Alternator G terminal D Engine: Warm up, and then idling Voltage increases by 0.2 –
D Radiator fan: not operating 3.5 V
D Headlamp: OFF → ON
D Stop lamp: OFF → ON
D Rear defogger switch: OFF → ON
41 Alternator FR terminal D Engine: Warm up, and then idling Voltage decreases
D Radiator fan: not operating
D Headlamp: OFF → ON
D Stop lamp: OFF → ON
D Rear defogger: OFF → ON
35 Stop lamp switch Depress the brake pedal. System voltage

Release the brake pedal. 0–3V

36 Engine warning lamp Ignition switch: OFF → ON 0 – 3 V → system voltage

(after several seconds)

37 Power steering fluid Engine: Warm Steering wheel System voltage

pressure switch up, and then stationary
idling
Steering wheel 0–3V
turning

38 Engine control relay Ignition switch: OFF 0–3V

Ignition switch: ON System voltage

42 Brake vacuum sensor Engine: Stop the engine from idle Voltage increases
speed, turn the ignition switch ON,
and then depress the brake pedal
several times.

44 Clutch switch Depress the clutch pedal. 0–3V

Release the clutch pedal. System voltage

 GDI – Troubleshooting 13A-83

Terminal Check item Check requirements (engine condition) Normal condition

No.
45 A/C switch (1st channel) Engine: idling A/C switch: OFF 0–3V

A/C switch: ON System voltage

(Compressor is
operating)

51 Injector open circuit check Engine: Increase engine speed from Decreases slightly
signal idle speed to 4,000 r/min. (approx.0.7 V) from 4.5 V –
5.0 V.

52 Small lamp switch Lighting switch: OFF 0–3V

Lighting switch: ON (Taillamp: ON) System voltage

57 Accelerator pedal position Ignition switch: Release the 0–1V

switch ON accelerator pedal.

Depress the 4 V or more

accelerator pedal
slightly.

58 Tachometer output Engine: 3,000 r/min 2.0 – 9.0 V

71 Ignition switch – ST Engine: cranking 8 V or more

72 Intake air temperature Ignition switch: Intake air temper- 3.2 – 3.8 V
sensor ON ature: 0_C

Intake air temper- 2.3 – 2.9 V

ature: 20_C

Intake air temper- 1.5 – 2.1 V

ature: 40_C

Intake air temper- 0.4 – 1.0 V

ature: 80_C

73 A/C switch (2nd channel) Refer to GROUP 55 – Troubleshooting “Check at the A/C-ECU
terminals, engine-ECU output terminals.”

74 Fuel pressure sensor Engine: idling 0.3 – 4.7 V

75 M/T oil temperature sensor M/T oil temperature: 25_C 2.4 – 2.7 V

M/T oil temperature: 80_C 0.5 – 0.8 V

76 Oxygen sensor Engine: Warm up, and then hold the 0 and 0.8 V alternates.
engine speed at 2,500 r/min (Use a
digital voltmeter).

77 Sensor power supply Ignition switch: ON 4.5 – 5.5 V

81 Power supply to accelerator Ignition switch: ON 4.5 – 5.5 V

pedal position sensor (1st
channel)

80 Back-up power source Ignition switch: OFF System voltage

82 Ignition switch – IG Ignition switch: ON System voltage

13A-84 GDI – Troubleshooting

Terminal Check item Check requirements (engine condition) Normal condition

No.
83 Engine coolant temperature Ignition switch: Engine coolant 3.2 – 3.8 V
sensor ON temperature: 0_C

Engine coolant 2.3 – 2.9 V

temperature: 20_C

Engine coolant 1.3 – 1.9 V

temperature: 40_C

Engine coolant 0.3 – 0.9 V

temperature: 80_C

84 Throttle position sensor Ignition switch: Release the 4.2 – 4.8 V

(2nd channel) ON accelerator pedal.

Depress the 0.2 – 0.9 V

accelerator pedal
fully.

85 Barometric pressure sensor Ignition switch: Altitude: 0 m 3.7 – 4.3 V

ON
Altitude: 1,200 m 3.2 – 3.8 V

86 Vehicle speed sensor D Ignition switch: ON 0 V and system voltage

D Move the vehicle forward. alternates.

87 Accelerator pedal position Ignition switch: Release the 0.4 – 0.9 V

sensor (1st channel) ON accelerator pedal.

Depress the 4.5 V or more

accelerator pedal
fully.

88 Camshaft position sensor Engine: Cranking 0.3 – 3.0 V

Engine: Idling 0.5 – 3.5 V

89 Crank angle sensor Engine: Cranking 0.4 – 4.0 V

Engine: Idling 1.5 – 2.5 V

90 Air flow sensor Engine: Idling 2.2 – 3.2 V

Engine: 2,500 r/min

GDI – Troubleshooting 13A-85
CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS
1. Turn the ignition switch to OFF.
2. Disconnect the engine-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-ECU harness-side connector
while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-ECU and/or ohmmeter.
Be careful to prevent this!
4. If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5. After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.
13A-86 GDI – Troubleshooting

Engine-ECU Harness Side Connector Terminal Arrangement

Terminal No. Check item Standard value, normal condition (check require-
ments)

5 – 12 Purge control solenoid valve 36 – 44 Ω (at 20_C)

6 – 12 Oxygen sensor heater control 11 – 18 Ω (at 20_C)

13 – Body earth Earth Continuity (0 Ω)

26 – Body earth

31 – 12 EGR valve (C) 15 – 20 Ω (at 20_C)

32 – 12 EGR valve (D)

39 – 12 EGR valve (A)

40 – 12 EGR valve (B)

57 – 92 Accelerator pedal position switch Continuity (when the accelerator pedal is released)

No continuity (when the accelerator pedal is slightly

depressed)

72 – 53 Intake air temperature sensor 5.3 – 6.7 kΩ (when intake air temperature is 0_C)

2.3 – 3.0 kΩ (when intake air temperature is 20_C)

1.0 – 1.5 kΩ (when intake air temperature is 40_C)

0.30 – 0.42 kΩ (when intake air temperature is 80_C)

83 – 53 Engine coolant temperature sensor 5.1 – 6.5 kΩ (when engine coolant temperature is
0_C)

2.1 – 2.7 kΩ (when engine coolant temperature is

20_C)

0.9 – 1.3 kΩ (when engine coolant temperature is

40_C)

0.26 – 0.36 kΩ (when engine coolant temperature is

80_C)
 GDI – Troubleshooting 13A-87
CHECK AT THE THROTTLE VALVE CONTROLLER TERMINALS
TERMINAL VOLTAGE CHECK CHART
Throttle Valve Controller Terminal Arrangement

Terminal Check items Requirements Normal value

No.

1 Throttle valve control servo D Ignition switch: ON Decreases slightly from

(A+) D Accelerator pedal: Fully opened → system voltage.
fully closed
9 Throttle valve control servo
(B+)

14 Throttle valve control servo D Ignition switch: ON Decreases slightly (approx.

(A–) D Accelerator pedal: Fully closed → 2 V) from system voltage.
fully opened
15 Throttle valve control servo
(B–)

2 Power supply to throttle Ignition switch: ON System voltage

valve control servo
19

5 Power supply Ignition switch: ON System voltage

6 Sensor voltage Ignition switch: ON 4.5 – 5.5 V

7 Throttle position sensor (1st Ignition switch: Release the 0.4 – 0.6 V
channel) ON accelerator pedal.

Depress the 3.9 – 4.9 V

accelerator pedal
fully.

20 Accelerator pedal position Ignition switch: Release the 0.4 – 0.9 V

sensor (2nd channel) ON accelerator pedal.

Depress the 4.5 V or more

accelerator pedal
fully.

22 Ignition switch – IG Ignition switch: ON System voltage

13A-88 GDI – Troubleshooting

Analyzer INSPECTION PROCEDURE USING AN ANALYZER

AIR FLOW SENSOR (AFS)
Measurement Method
Special
patterns 1. Disconnect the air flow sensor connector, and connect
pickup the special tool (test harness: MB991709) in between.
(All terminals should be connected.)
2. Connect the analyzer special patterns pickup to air flow
sensor connector terminal 3.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal 90.
Standard Wave Pattern
Observation conditions

Function Special patterns

Pattern height Low
Pattern selector Display
Engine r/min Idle speed
Standard wave pattern
(V) The time (cycle time) T is reduced when
10 T the amount of intake air increases.
T1 T2 Times T1 and T2 are equal.

Time
0

Observation conditions (from conditions above engine speed is increased by racing.)

(V)

10
T

Time
0

Wave Pattern Observation Points

Check that cycle time T becomes shorter and the frequency increases when the engine speed is increased.
 GDI – Troubleshooting 13A-89
Examples of Abnormal Wave Patterns
D Example 1
Cause of problem
Sensor interface malfunction
Wave pattern characteristics
Rectangular wave pattern is output even when the engine
is not started.
D Example 2
Cause of problem
Damaged rectifier or vortex generation column
Wave pattern characteristics
Unstable wave pattern with non-uniform frequency.
However, when an ignition leak occurs during acceleration,
the wave pattern will be distorted temporarily, even if the
air flow sensor is normal.

Camshaft position sensor

Analyzer
CAMSHAFT POSITION SENSOR AND CRANK ANGLE
connector SENSOR
Special patterns
pick-up
Measurement Method
1. Disconnect the camshaft position sensor connector and
connect the special tool (test harness: MB991709) in
between. (All terminals should be connected.)
2. Connect the analyzer special patterns pickup to camshaft
position sensor terminal 2.
Crank angle 3. Disconnect the crank angle sensor connector and connect
sensor connector the special tool (test harness: MD998478) in between.
4. Connect the analyzer special patterns pickup to crank
angle sensor terminal 2.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal 88. (When checking the camshaft
position sensor signal wave pattern.)
2. Connect the analyzer special patterns pickup to
engine-ECU terminal 89. (When checking the crank angle
sensor signal wave pattern.)
Standard Wave Pattern
Observation conditions
Function Special patterns

Pattern height Low

Pattern selector Display

Engine r/min Idle speed

13A-90 GDI – Troubleshooting

Standard wave pattern

2 engine revolutions
(1 camshaft revolution)
(V) The time (cycle time) T is
75_BTDC reduced when the engine
5_BTDC speed increases

Crank angle
sensor output
wave pattern

0
130° 50° 145° 35°

Camshaft posi-
tion sensor out-
put wave pat-
tern

Time
0
No. 1 No. 3 TDC No. 4 No. 2
TDC TDC TDC
TDC: Top dead centre

Wave Pattern Observation Points

Check that cycle time T becomes shorter when the engine speed increases.

Examples of Abnormal Wave Patterns

D Example 1
Cause of problem
Sensor interface malfunction
Wave pattern characteristics
Rectangular wave pattern is output even when the engine
is not started.

D Example 2
Cause of problem
Loose timing belt
Abnormality in sensor disk
Wave pattern characteristics
Wave pattern is displaced to the left or right.
 GDI – Troubleshooting 13A-91
INJECTORS AND INJECTOR OPEN CIRCUIT CHECK
SIGNAL
Measurement Method
1. Connect the analyzer special patterns pickup to terminal
1 (No.1 injector) of the engine-ECU connector.
2. Connect the analyzer special patterns pickup to terminal
51 (injector open circuit check signal) of the engine-ECU
Analyzer
Special patterns
connector.
pickup 3. After checking terminal 1, check terminal 14 (No.2 injector),
terminal 2 (No.3 injector) and terminal 15 (No.4 injector).

Standard Wave Pattern

Observation conditions
Function Special pattern

Pattern height Low

Pattern selector Display

Engine r/min Idle speed

Standard wave pattern

(V)

4
Injector
open circuit
check signal
0

Injector
drive signal

4
0
(ms)

Wave Pattern Observation Points

Normal wave
pattern D Check that the injector drive time is identical to the time
displayed on the MUT-II.
D Check that the injector signals become greatly extended
but soon return to their normal wave length when the
engine is suddenly raced.
D Check that the injector open circuit check signal is
synchronized with each rising portion of the injector drive
signal.
13A-92 GDI – Troubleshooting

Analyzer IGNITION COIL AND POWER TRANSISTOR

Power transistor control signal
Measurement Method
1. Disconnect the ignition coil connector, and connect the
special tool (test harness: MB991658) in between. (All
terminals should be connected.)
Special 2. Connect the analyzer special patterns pickup to terminal
patterns 3 of each ignition coil connector in turn.
pickup
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal 10 (No. 1 ignition coil), terminal 11
(No. 2 ignition coil), terminal 23 (No. 3 ignition coil), terminal
24 (No. 4 ignition coil) respectively.
Standard Wave Pattern
Observation condition
Function Special patterns
Pattern height Low
Pattern selector Display
Engine r/min Approx. 1,200 r/min

Standard wave pattern

(V)

T T: Revolution time corresponding to a crank angle of 180_

6 Compression top dead center

Crank angle 4
sensor output
2
wave pattern
0

Ignition period
θ θ: Spark
Power transistor 4 advance
control signal angle
wave pattern 2
0
OFF ON

Dwell section
Time
 GDI – Troubleshooting 13A-93
Wave Pattern Observation Points
Point: Condition of wave pattern build-up section and maximum voltage (Refer to abnormal wave pattern
examples 1 and 2.)

Condition of wave pattern build-up section and maximum voltage Probable cause

Rises from approx. 2V to approx. 4.5V at the top-right Normal

2V rectangular wave Open-circuit in ignition primary circuit

Rectangular wave at power voltage Power transistor malfunction

Examples of Abnormal Wave Patterns

--- Normal wave pattern
D Example 1
Wave pattern during engine cranking
Cause of problem
2V Open-circuit in ignition primary circuit
Wave pattern characteristics
Top-right part of the build-up section cannot be seen, and
voltage value is approximately 2V too low.

D Example 2
--- Normal wave pattern
Wave pattern during engine cranking
VB
Cause of problem
Malfunction in power transistor
Wave pattern characteristics
Power voltage results when the power transistor is ON.
13A-94 GDI – Troubleshooting

Analyzer EGR VALVE (STEPPER MOTOR)

Measurement Method
1. Disconnect the EGR valve connector, and connect the
special tool (test harness: MB991658) in between.
2. Connect the analyzer special patterns pickup to the EGR
valve-side connector terminal 1, terminal 3, terminal 4
and terminal 6 respectively.
Special
patterns
pickup

Alternate Method (Test harness not available)

1. Connect the analyzer special patterns pickup to
engine-ECU terminal 39, connection terminal 40,
connection terminal 31, and connection terminal 32
respectively.
Standard Wave Pattern
Observation conditions
Function Special patterns

Pattern height High

Pattern selector Display

Engine condition When the engine coolant temperature is 20_C or below, turn the ignition switch from OFF
to ON (without starting the engine).

While the engine is idling, turn the A/C switch to ON.

Immediately after starting the warm engine

Standard wave pattern

(V)
The wave pattern
appears for an Point B Point A
instant, but soon Coil reverse electromo- Induced electromotive force
30 disappears. tive force (Approx. 3 × from the motor turning
10V)

20

EGR 10
valve
control
signal
wave
pattern
Time
 GDI – Troubleshooting 13A-95
Wave Pattern Observation Points
Check that the standard wave pattern appears when the EGR control servo is operating.
Point A: Presence or absence of induced electromotive force from the motor turning. (Refer to the abnormal
wave pattern.)

Contrast with standard wave pattern Probable cause

Induced electromotive force does not appear or is extremely small. Motor is malfunctioning

Point B: Height of coil reverse electromotive force

Contrast with standard wave pattern Probable cause

Coil reverse electromotive force does not appear or is extremely small. Short in the coil

Examples of Abnormal Wave Pattern

D Example 1
Cause of problem
Motor is malfunctioning. (Motor is not operating.)
Wave pattern characteristics
Induced electromotive force from the motor turning does
not appear.

D Example 2
Open
circuit Cause of problem
side
Open circuit in the line between the EGR valve and the
engine-ECU
Wave pattern characteristics
Current is not supplied to the motor coil on the open circuit
side. (Voltage does not drop to 0 V.)
Nor- Furthermore, the induced electromotive force waveform
mal at the normal side is slightly different from the normal
side
waveform.
13A-96 GDI – On-vehicle Service

Fixed SAS ON-VEHICLE SERVICE

Caution
1. Never attempt to tamper the fixed SAS. The fixed SAS
is precisely adjusted at factory.
2. Should it be tampered, the full closed position of the
throttle valve will be changed. This causes the
engine-ECU to learn a wrong position of the throttle
valve.

THROTTLE BODY (THROTTLE VALVE ARE)

CLEANING
1. Start the engine, and warm it up until engine coolant
temperature reaches 80_C. Then stop the engine.
2. Remove the air intake hose at the throttle body side.
3. Apply cleaning agent to the throttle valve through the intake
port of the throttle valve, and then leave it for approx.
five minutes.
4. Start the engine, race it several times, and then let it run
at idle for approx. one minute.
5. If carbon deposits are not removed from the throttle vale
area, repeat steps (3) and (4).
6. Install the air intake hose.
7. Use the MUT-II or disconnect the negative battery cable
from the battery terminal in order to erase a diagnosis
code. Wait for at least ten seconds, and then let the engine
run at idle again for approx. ten minutes.

THROTTLE POSITION SENSOR ADJUSTMENT

Throttle position sensor
1. Connect the MUT-II to the diagnosis connector.
2. Disconnect the throttle valve control servo connector.
3. Turn on the ignition switch (but do not start the engine).

Throttle position sensor

connector (equipment side)

4. Check the output voltage of the throttle position sensor

(1st channel) when the throttle valve is fully closed by
your finger.
Standard value: 0.4 – 0.6 V
5. If not within the standard value, loosen the throttle position
sensor mounting bolts. Then rotate the sensor body to
adjust.
 GDI – On-vehicle Service 13A-97
6. Check the output voltage of the throttle position sensor
(2nd channel) when the throttle valve is fully closed by
your finger.
Standard value: 4.2 – 4.8 V
7. If not within the standard value, replace the throttle position
sensor.
8. Turn off the ignition switch.
9. Reconnect the throttle valve control servo connector.
10. Remove the MUT-II.
11. If a diagnosis code is displayed, erase the diagnosis code
by using the MUT-II or disconnect the negative battery
cable from the battery terminal and then leave it for at
least ten seconds. After that, reconnect the battery cable.
12. Turn on the ignition switch, wait for at least 10 seconds,
and then off again. In addition, if the battery cable is
disconnected at step 11, let the engine run at idle for
approx. ten minutes.

Accelerator pedal position ACCELERATOR PEDAL POSITION SWITCH

sensor (equipment connector) AND ACCELERATOR PEDAL POSITION
SENSOR ADJUSTMENT
Caution
1. Never attempt to tamper the accelerator pedal position
sensor. The sensor position is precisely adjusted at
factory.
2. Should it be tampered, follow the procedure below:
Accelerator pedal position sensor
1. Connect the MUT-II to the diagnosis connector.

Accelerator pedal 2. Remove the two accelerator pedal position sensor

position sensor assembly mounting bolts, and then insert a 0.60 mm of
thickness gauge blade between the accelerator lever and
stopper.
3. Turn on the ignition switch (but do not start the engine).

Accelerator lever Stopper (full stop

position)
View
A Accel-
erator
Accelerator pedal
lever position
sensor

Thickness
gauge
Stopper (full
stop position)
13A-98 GDI – On-vehicle Service

4. Loosen the accelerator pedal position sensor mounting

bolts, and then rotate it fully anticlockwise.
5. Check that the accelerator pedal position switch is on
(there should be continuity between terminals).
6. Slowly rotate the accelerator pedal position sensor
clockwise, and find the pint where the accelerator pedal
position switch is turned off (there will be no continuity).
At this point, tighten the accelerator pedal position sensor
mounting bolts securely.
7. Check output voltage of the accelerator pedal position
sensor (1st and 2nd channels).
Standard value: 0.4 – 0.9 V
8. If not within the standard value, check the accelerator
pedal position sensor (1st and 2nd channels) and its related
wiring harness.

Fuel pump FUEL PRESSURE TEST

(high pressure) MEASUREMENT OF FUEL LOW PRESSURE BETWEEN
FUEL PUMP (LOW PRESSURE) AND FUEL PUMP
(HIGH PRESSURE)
High-pressure
fuel hose 1. Release residual pressure from the fuel pipe line to prevent
fuel gush out. (Refer to P.13A-102.)
2. Disconnect the high-pressure fuel hose at the fuel pump
(high pressure) side.
Caution
Cover the hose connection with rags to prevent splash
of fuel that could be caused by some residual pressure
in the fuel pipe line.
 GDI – On-vehicle Service 13A-99
3. Remove the union joint and bolt from the special tool
MB991637 (adapter hose) and instead attach the special tool (hose
adapter) to the adapter hose.
Gasket 4. Install the special tool (for measuring the fuel pressure)
Fuel
pump MD998709 that was set up in step 3.
(high
pressure) <When using the fuel pressure gauge set (special tool)>
MD998742 (1) Install the special tool (for measuring the fuel pressure)
High-pressure between the high-pressure fuel hose and the fuel pump
fuel hose (high pressure).
(2) Install the fuel pressure gauge set (special tool) on
the special tool (for measuring the fuel pressure)
putting the gasket between them.
(3) Connect the lead wire of the fuel pressure gauge set
(special tool) to the power supply (cigarette lighter
socket) and to the MUT-II.

<When using the fuel pressure gauge>

Fuel pressure gauge (1) Install the fuel pressure gauge on the special tool
O-ring or gasket (for measuring the fuel pressure) putting a suitable
O-ring or gasket between them.
Fuel pump MD998709
(high (2) Install the special tool which was set up in step (1)
pressure) between the high-pressure fuel hose and the fuel pump
MD998742
(high pressure).
High-pressure
fuel hose 5. Connect the MUT-II to the diagnosis connector.
6. Turn the ignition switch to ON. (But do not start the engine.)
7. Select “Item No.07” from the MUT-II Actuator test to drive
the fuel pump (low pressure) at the fuel tank side. Check
that there are no fuel leaks from any parts.
8. Finish the actuator test or turn the ignition switch to OFF.
9. Start the engine and run at idle.
10. Measure fuel pressure while the engine is running at idle.
Standard value: 324 – 343 kPa
11. Check to see that fuel pressure at idle does not drop
even after the engine has been raced several times.
12. If fuel pressure is out of the standard value, troubleshoot
and repair according to the table below.
13A-100 GDI – On-vehicle Service

Symptom Probable cause Remedy

D Fuel pressure too low Clogged fuel filter Replace fuel filter
D Fuel pressure drops after racing
Fuel leaking to return side due to poor Replace fuel pressure regulator
fuel pressure regulator (low pressure) (low pressure)
valve seating or settled spring

Low fuel pump (low pressure) delivery Replace the fuel pump (low pressure)
pressure

Fuel pressure too high Binding valve in fuel pressure regula- Replace fuel pressure regulator
tor (low pressure) (low pressure)

Clogged fuel return hose or pipe Clean or replace hose or pipe

13. Stop the engine and check change of fuel pressure gauge
reading. Normal if the reading does not drop within 2
minutes. If it does, observe the rate of drop and
troubleshoot and repair according to the table below.

Symptom Probable cause Remedy

Fuel pressure drops gradually after Leaky fuel pressure regulator (low Replace fuel pressure regulator
engine is stopped pressure) valve seat (low pressure)

Fuel pressure drops sharply Check valve in fuel pump (low Replace the fuel pump (low pressure)
immediately after engine is stopped pressure) is held open

14. Release residual pressure from the fuel pipe line. (Refer
to P.13A-102.)
15. Remove the fuel pressure gauge and special tools from the
fuel pump (high pressure).
Caution
Cover the hose connection with rags to prevent splash
of fuel that could be caused by some residual pressure
in the fuel pipe line.
16. Replace the O-ring at the end of the high-pressure fuel
hose with a new one. Furthermore, apply engine oil to
the new O-ring before replacement.
17. Fit the high-pressure fuel hose to the fuel pump (high
pressure) and tighten the mounting bolt to specified torque.
18. Check for any fuel leaks by following the procedure in
step 7.
19. Disconnect the MUT-II.
 GDI – On-vehicle Service 13A-101
MEASUREMENT OF FUEL HIGH PRESSURE BETWEEN
Injector intermediate FUEL PUMP (HIGH PRESSURE) AND INJECTORS
harness
NOTE
Measurement of the fuel pressure between the fuel pump
(high pressure) and the injectors should be carried out after
checking that the fuel pressure between the fuel pump (low
pressure) and the fuel pump (high pressure) is normal.
1. Connect the MUT-II to the diagnosis connector.
2. Disconnect the injector intermediate harness connector.
3. Turn the ignition switch to ON.
4. Select “Item No.74” from the MUT-II Data list.
5. Crank the engine continuously for 2 seconds or more,
and visually check that there are no fuel leaks from any
parts.
Caution
If any fuel leaks appear, stop cranking immediately
and repair the source of the leak.
6. Check if the fuel pressure is more than 1 MPa immediately
after 20 seconds have passed since cranking was finished.
7. If the fuel pressure is lower than 1 MPa, it means that
there is likely to be a leak in the high-pressure fuel system,
so this system should be checked.
Caution
If the fuel pressure drops by more than 1 MPa, it means
that there is likely to be a leak in the high-pressure
fuel system, so this system should be checked.
8. Turn the ignition switch to OFF.
9. Connect the injector intermediate harness connector.
10. Start the engine and run at idle.
11. Measure fuel pressure while the engine is running at idle.
Standard value: 4 – 7 MPa
12. Check to see that fuel pressure at idle does not drop
even after the engine has been raced several times.
13. If fuel pressure is out of the standard value, troubleshoot
and repair according to the table below.

Symptom Probable cause Remedy

D Fuel pressure too low Fuel leaking to return side due to poor Replace fuel pressure regulator
D Fuel pressure drops after racing fuel pressure regulator (high pres- (high pressure)
sure) valve seating or settled spring

Low fuel pump (high pressure) Replace the fuel pump

delivery pressure (high pressure)

Fuel pressure too high Binding valve in fuel pressure regula- Replace fuel pressure regulator
tor (high pressure) (high pressure)

Clogged fuel return hose or pipe Clean or replace hose or pipe

14. Stop the engine and turn the ignition switch to OFF.
15. Disconnect the MUT-II.
13A-102 GDI – On-vehicle Service

FUEL LEAK CHECK

Injector intermediate
harness 1. Connect the MUT-II to the diagnosis connector.
2. Disconnect the injector intermediate harness connector.
3. Turn the ignition switch to ON.
4. Select “Item No.74” from the MUT-II Data list.
5. Crank the engine continuously for 2 seconds or more,
and visually check that there are no fuel leaks from any
parts.
Caution
If any fuel leaks appear, stop cranking immediately
and repair the source of the leak.
6. Stop cranking and measure fuel pressure immediately after
20 seconds.
Limit: Minimum 1 MPa
Caution
If the fuel pressure is less than 1 MPa, there may
be a partial fuel leak in the high-pressure fuel system.
Check this system.
7. Turn off the ignition switch.
8. Reconnect the injector intermediate connector.
9. Remove the MUT-II.

Fuel pump module connector

FUEL PUMP CONNECTOR DISCONNECTION
(HOW TO REDUCE FUEL PRESSURE)
When removing the fuel pipe, hose, etc., since fuel pressure
in the fuel pipe line is high, do the following operation so
as to release fuel pressure in the line and prevent fuel from
running out.
(1) Remove the rear seat assembly. (Refer to GROUP 52A.)
(2) Remove the protector.
(3) Disconnect the fuel pump module connector.
(4) Connect the MUT-II to the diagnosis connector.
Caution
Turn off the ignition switch before disconnecting or
connecting the MUT-II.
(5) Turn off the ignition switch.
(6) Select “Item No.74” from the MUT-II Data list.
(7) Crank the engine for at least two seconds.
(8) If the engine is not be started, use the MUT-II to make
sure that the fuel pressure is 0.5 MPa or less. Then turn
off the ignition switch.
 GDI – On-vehicle Service 13A-103
(9) If the engine is started, release fuel pressure by the
following procedure:
1) Turn off the ignition switch, and then stop the engine.
2) Disconnect one of the ignition coil connectors.
3) Crank the engine for at least two seconds.
4) If the engine can not be started, use the MUT-II to
make sure that the fuel pressure is 0.5 MPa or less.
Then turn off the ignition switch.
5) If the engine is started, stop it by racing and use the
MUT-II to make sure that the fuel pressure is 0.5
MPa or less. Then turn off the ignition switch.
6) Reconnect the ignition coil connector.
Caution
Clean the spark plug which corresponds to the
disconnected ignition coil connector.
(10)Remove the MUT-II.
(11)Reconnect the fuel pump module connector.
(12)Install the protector and rear seat assembly.

FUEL PUMP OPERATION CHECK

1. Check the operation of the fuel pump by using the MUT-II
Fuel pump to force-drive the fuel pump.
module 2. If the fuel pump will not operate, check by using the
following procedure, and if it is normal, check the drive
circuit.
(1) Turn the ignition switch to OFF.
Battery
(2) Remove the rear seat assembly. (Refer to GROUP
52A.)
(3) Remove the protector.
(4) Disconnect the fuel pump module connector. Listen
to a fuel pump operation sound while connecting
battery voltage to No.4 terminal of the fuel pump
module, and No.5 terminal to earth.
(5) Check fuel pressure by pinching the fuel hose with
your finger.
(6) Connect the fuel pump module connector.
(7) Install the protector and rear seat assembly.
13A-104 GDI – On-vehicle Service

COMPONENT LOCATION
Name Symbol Name Symbol
A/C relay J Fuel pressure sensor L
A/C switch O Fuel pump relay R
Accelerator pedal position sensors A Ignition coil C

Air flow sensor (with intake air temperature I Injectors D

sensor and barometric pressure sensor)
Injector driver B

Camshaft position sensor L Injector driver relay B

M/T oil temperature sensor S

Crank angle sensor M Oxygen sensor T
Detonation sensor E Power steering fluid pressure switch K
Diagnosis connector P Purge control solenoid valve G
EGR valve F Throttle position sensor G
Engine control relay R Throttle valve controller Q
Engine coolant temperature sensor L Throttle valve control servo G
Engine-ECU Q Throttle valve control servo relay Q
Engine warning lamp (CHECK ENGINE lamp) N Vehicle speed sensor H

A B C D E F G H I J N O

K L M P Q R

S T
 GDI – On-vehicle Service 13A-105
ENGINE CONTROL RELAY, FUEL PUMP
Engine control relay
RELAY AND THROTTLE VALVE CONTROL
SERVO RELAY CONTINUITY CHECK
Batteryy voltage
g Terminal No.
1 2 3 4
Not supplied
Fuel pump relay Supplied
Equipment side connector

Throttle valve control

servo relay

Equipment side
connector

Injector driver control INJECTOR DRIVER CONTROL RELAY

relay CONTINUITY CHECK
Batteryy voltage
g Terminal No.
1 2 3 4
Not supplied
Supplied

Equipment side connector

Equipment side connector INTAKE AIR TEMPERATURE SENSOR CHECK

1. Disconnect the air flow sensor connector.
2. Measure resistance between terminals 5 and 6.
Standard value:
2.3 – 3.0 kΩ (at 20_C)
0.30 – 0.42 kΩ (at 80_C)

Air flow sensor

Intake air temperature 3. Measure resistance while heating the sensor using a hair
sensor drier.
Normal condition:
Temperature (_C) Resistance (kΩ)
Higher Smaller
4. If the value deviates from the standard value or the
resistance remains unchanged, replace the air flow sensor
assembly.
13A-106 GDI – On-vehicle Service

ENGINE COOLANT TEMPERATURE SENSOR

CHECK
Caution
Be careful not to touch the connector (resin section) with
the tool when removing and installing.
1. Remove the engine coolant temperature sensor.

Engine coolant temperature sensor

2. With temperature sensing portion of engine coolant

temperature sensor immersed in hot water, check
resistance.
Standard value:
2.1 – 2.7 kΩ (at 20_C)
0.26 – 0.36 kΩ (at 80_C)
3. If the resistance deviates from the standard value greatly,
replace the sensor.

4. Apply sealant to threaded portion.

Specified sealant:
3M NUT Locking Part No.4171 or equivalent
5. Install the engine coolant temperature sensor and tighten
it to the specified torque.
Tightening torque: 29 Nm

THROTTLE POSITION SENSOR CHECK

Throttle position sensor
1. Disconnect the throttle position sensor connector.
2. Measure the resistance between throttle position sensor
side connector terminal 1 and terminal 3.
Standard value: 3.5 – 6.5 kΩ
3. Measure resistance between terminal Nos. 1 and 2 as
well as 1 and 4 of the throttle position sensor connector,
respectively.
Equipment side connector Normal condition:
Throttle valve slowly open Changes smoothly in
until fully open from the idle proportion to the opening
position angle of the throttle valve
4. If the resistance is outside the standard value, or if it doesn’t
change smoothly, replace the throttle position sensor.
NOTE
For the throttle position sensor adjustment procedure, refer
to P.13A-96.
 GDI – On-vehicle Service 13A-107

Equipment side connector

ACCELERATOR PEDAL POSITION SENSOR
CHECK
1. Disconnect the accelerator pedal position sensor
connector.
2. Measure resistance between terminal Nos.2 and 1 as well
as Nos.8 and 7 of the sensor connector.
Standard value: 3.5 – 6.5 kΩ
Accelerator pedal position sensor 3. Measure resistance between terminal Nos.2 and 3 as well
as 8 and 6 of the accelerator pedal position sensor
connector, respectively.
Normal condition:
Depress the accelerator Resistance value changes in
pedal slowly. accordance with the
accelerator pedal
depression smoothly.
4. If not within the standard value, or resistance value does
not change smoothly, replace the accelerator pedal position
sensor assembly.
NOTE
After replacement, adjust the accelerator pedal position
sensor. (Refer to P.13A-97.)

Equipment side connector ACCELERATOR PEDAL POSITION SWITCH

CHECK
1. Disconnect the accelerator pedal position sensor
connector.
2. Check continuity between terminal Nos. 4 (accelerator
pedal position switch) and 5 (sensor earth) of the
accelerator pedal position sensor.

Accelerator pedal position sensor

Normal condition
Accelerator pedal Continuity
Depress No continuity
Release Continuity
3. If defective, replace the accelerator pedal position sensor
assembly.
NOTE
After replacement, adjust the accelerator pedal position
sensor and switch. (Refer to P.13A-97.)
13A-108 GDI – On-vehicle Service

OXYGEN SENSOR CHECK

Oxygen sensor 1. Disconnect the oxygen sensor connector and connect the
special tool (test harness) to the connector on the oxygen
sensor side.
2. Make sure that there is continuity (11 – 18 Ω at 20_C)
between terminal 1 (red clip of special tool) and terminal
3 (blue clip of special tool) on the oxygen sensor connector.

Equipment side connector

3. If there is no continuity, replace the oxygen sensor.

4. Warm up the engine until engine coolant is 80_C or higher.

Oxygen
Red sensor
equipment
side connector
Blue

MD998464

5. Use a jumper wire to connect terminal 1 (red clip) of the

Jumper oxygen sensor connector to the battery (+) terminal and
wire terminal 3 (blue clip) to the battery (–) terminal.
Black Caution
Red Be very careful when connecting the jumper wire;
incorrect connection can damage the oxygen sensor.
White Blue 6. Connect a digital voltage meter between terminal 2 (black
clip) and terminal 4 (white clip).
7. While repeatedly racing the engine, measure the oxygen
MD998464 sensor output voltage.
Standard value:
Engine Oxygen sensor Remarks
output voltage
When 0.6 – 1.0 V If you make the air/fuel ratio
racing the rich by racing the engine
engine repeatedly, a normal oxy-
gen sensor will output a
voltage of 0.6 – 1.0 V.
8. If the sensor is defective, replace the oxygen sensor.
NOTE
For removal and installation of the oxygen sensor, refer
to GROUP 15 – Exhaust Pipe and Main Muffler.
 GDI – On-vehicle Service 13A-109
INJECTOR CHECK
Injector side connec-
tor Injector intermediate
1. Disconnect the injector intermediate harness connector.
harness 2. Measure the resistance between each of the terminals.
Standard value: 0.9 – 1.1 Ω (at 20_C)

Injector Measurement terminal

No.1 cylinder 1–2

No.2 cylinder 3–4

No.3 cylinder 5–6

No.4 cylinder 7–8

3. Connect the injector intermediate harness connector.

THROTTLE VALVE CONTROL SERVO CHECK
Operation Check
1. Disconnect the air intake hose from the throttle body.
2. Turn on the ignition switch.
3. Check that the throttle valve opens or closes in response
to the accelerator pedal depression.
Check of Coil Resistance
Throttle valve
control servo
Equipment side connector 1. Disconnect the throttle valve control servo connector.
2. Measure resistance between the throttle valve control
servo connector terminals.
Standard value:

Terminals to be measured Resistance value (Ω)

Intake
manifold 1–3 1.35 – 1.65 (at 20_C)

2–4

3. Check that there is no continuity between the terminals

and body.
CLUTCH SWITCH CHECK
1. Disconnect the connector.
2. Check for continuity between the terminals of the switch.
Measurement conditions Terminal No.
1 2
When clutch pedal is depressed.
When clutch pedal is not depressed.

PURGE CONTROL SOLENOID VALVE CHECK

Refer to GROUP 17 – Emission Control System.
EGR VALVE CHECK
Refer to GROUP 17 – Emission Control System.
13A-110 GDI – Fuel Pump (High Pressure)

FUEL PUMP (HIGH PRESSURE)

REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
D Prevention of Fuel Discharge <before removal only> D Air Cleaner Assembly Removal and Installation
(Refer to P.13A-102.) D Fuel Leak Check <after Installation only.>
D Engine Cover Removal and Installation (Refer to P.13A-102.)

19 Nm O-ring
1 17
8
9 19
1
10

22 – 25 Nm 18 3,5,6,
13,14,16
11 7 Engine oil

19 Nm 10 – 13 Nm

4 2
5
16
9 Nm
10 – 13 Nm

4
9 Nm
6

2
24 Nm
20
15 3 10 – 13 Nm

5 Nm → 17 Nm

14
5 Nm 13 9 Nm
12
 GDI – Fuel Pump (High Pressure) 13A-111
Fuel pressure regulator (high 2. Fuel pipe clamp
pressure) removal steps "CA 3. Fuel feed pipe
"HA D Air-bleeding of fuel pump (high "CA 5. Fuel low-pressure pipe
pressure) 12. Fuel return hose connection
1. Harness connector and clamp "EA 13. Fuel pressure hose connection
4. Fuel return hose connection "CA 14. Fuel nipple assembly
"CA 5. Fuel low-pressure pipe "DA 15. Fuel pump (high pressure)
"CA 6. Fuel return pipe connection "BA 17. Back-up ring A
7. Fuel pressure regulator (high pres- AB" "BA 18. O-ring
sure) assembly "BA 19. Back-up ring B
AA" "GA 8. Flange
"GA 9. Fuel pressure sensor Pump camshaft case assembly
"FA 10. O-ring removal steps
"FA 11. Back-up ring 7. Fuel pressure regulator (high pres-
"BA 17. Back-up ring A sure) assembly
AB" "BA 18. O-ring "DA 15. Fuel pump (high pressure)
"BA 19. Back-up ring B 16. Fuel return pipe
"BA 17. Back-up ring A
Fuel pump (high pressure) removal AB" "BA 18. O-ring
steps "BA 19. Back-up ring B
D Throttle body (Refer to P.13A-118.) "AA 20. Pump camshaft case assembly

REMOVAL SERVICE POINT

AA" FLANGE REMOVAL
Fuel pressure If reusing the fuel pressure sensor, make the mating marks
sensor
on the sensor and the flange before removing the flange.
Flange
NOTE
The flange will be bent when it is installed to the engine.
Because of this, the sealing condition and installation condition
Mating marks of the fuel pressure sensor will be maintained in good condition.
Therefore, the mating marks should be made in order to install
the flange in the original condition. If replacing the fuel pressure
sensor with a new part, the sensor and flange should be
replaced together.
13A-112 GDI – Fuel Pump (High Pressure)

INSTALLATION SERVICE POINTS

"AA PUMP CAMSHAFT CASE ASSEMBLY
INSTALLATION
1. Set the No.1 cylinder to the compression top dead centre
O-ring position.
2. Align the mating mark on the housing of the pump camshaft
case assembly with the mating mark on the coupling, and
Mating marks
then install the pump camshaft case assembly to the
engine.
Caution
Be careful not to drop the O-ring.

"BA BACK-UP RING B/O-RING/BACK-UP RING A

INSTALLATION
O-ring
Back-up ring A Install the back-up rings and the O-ring as shown in the
illustration.
Caution
1. Install the back-up ring B facing its cutaway surface
Cutaway toward the opposite side of the O-ring as shown in
surface the illustration.
Back-up ring B
2. Confirm the outer diameter of the back-up ring A. Take
care not to install the back-up ring for the fuel pressure
sensor by mistake. (Outer diameter of the back-up
ring A: 14.8 mm)
"CA FUEL RETURN PIPE/FUEL LOW-PRESSURE
PIPE/FUEL FEED PIPE INSTALLATION
Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside the
fuel pump (high pressure), fuel pressure regulator (high
pressure) or the delivery pipe assembly.

"DA FUEL PUMP (HIGH PRESSURE) INSTALLATION

Use a torque wrench with a precision of 0.5 Nm to tighten
1 3 the fuel pump mounting bolts according to the following
procedure.
1. Tighten the bolts to 5 Nm in the order shown in the
illustration.
2. Tighten the bolts to 17 Nm in the order shown in the
illustration. The overall difference in tightening torque
4 2 between the four bolts should be within 2 Nm.
 GDI – Fuel Pump (High Pressure) 13A-113
"EA FUEL PRESSURE HOSE INSTALLATION
1. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the fuel pump (high pressure).
2. While being careful not to damage the O-ring, turn the
high-pressure fuel hose to the left and right and connect
it to the fuel pump (high pressure). After connecting, check
that the hose turns smoothly.
3. If the hose does not turn smoothly, the cause may be
that the O-ring is getting caught. Disconnect the hose,
check the O-ring for damage and re-connect the hose
to the fuel pump (high pressure) and then re-check.

"FA BACK-UP RING/O-RING INSTALLATION

Back-up ring Install the back-up ring and the O-ring as shown in the
O-ring illustration.
Caution
Take care not to install the back-up ring A for the injector,
fuel feed pipe or fuel return pipe by mistake. (Outer
diameter of the back-up ring for the fuel pressure sensor:
15.1 mm)
Fuel pressure sensor

"GA FUEL PRESSURE SENSOR/FLANGE

INSTALLATION
1. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the fuel pressure regulator (high pressure) assembly.
2. Align the mating marks which were made at the time of
removal, and then install the fuel pressure sensor and
flange to the fuel pressure regulator (high pressure)
assembly.
Caution
If replacing the fuel pressure sensor with a new part,
the sensor and flange should be replaced together.
13A-114 GDI – Fuel Pump (High Pressure)

"HA FUEL PUMP (HIGH PRESSURE) AIR-BLEEDING

1. Drive the engine at 2,000 r/min for at least 15 seconds,
and bleed the pump.
NOTE
Air may enter the fuel pump when it is removed. If air
has entered, diagnosis code No.56 is displayed due to
an abnormal fuel pressure.
2. Then confirm the diagnosis code by the MUT-II. If diagnosis
code No.56 (indicating a malfunction of the fuel pressure
sensor system) is displayed, erase it.
 GDI – Injector 13A-115
INJECTOR
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
D Prevention of Fuel Discharge <before removal only> D Intake Manifold Removal and Installation (Refer to
(Refer to P.13A-102.) GROUP 15.)
D Engine Cover Removal and Installation D Fuel Leak Check <after installation only> (Refer to
D Air Cleaner Assembly Removal and Installation P.13A-102.)

10

11
10 – 13
Nm
8

20 – 25
Nm 3
18 17 16 15 14 13 9

12

O-ring
O- 4 2
ring 6
L
12 1
10 –
2, 3 5 13 Nm

Engine oil

Removal steps
1. Fuel pipe clamp AB" "BA 10. Delivery pipe assembly
"DA 2. Fuel feed pipe 11. Insulator
"DA 3. Fuel return pipe AB" "BA 12. Fuel injector assembly
"CA 4. Back-up ring A 13. Back-up ring
"CA 5. O-ring 14. O-ring
"CA 6. Back-up ring B 15. Back-up ring
AA" 7. Injector harness connector 16. Fuel injector
8. Washer 17. Gasket
9. Injector holder "AA 18. Corrugated washer
13A-116 GDI – Injector

REMOVAL SERVICE POINTS

AA" INJECTOR HARNESS CONNECTOR
DISCONNECTION
Caution
Disconnect the negative battery cable from its terminal
before carrying out this operation.

AB" DELIVERY PIPE ASSEMBLY/FUEL INJECTOR

ASSEMBLY REMOVAL
Remove the delivery pipe assembly with the fuel injector
assembly still attached.
Caution
Be careful not to drop the fuel injector assembly when
removing the delivery pipe assembly.

Corrugated washer
INSTALLATION SERVICE POINTS
"AA CORRUGATED WASHER INSTALLATION
Caution
1. The corrugated washer should always be replaced
with a new part.
2. There should be no scratches or foreign particles on
f
Good No good
the corrugated washer mounting surface of the
injector.
3. Be careful not to mistake the corrugated washer
installation direction.
"BA FUEL INJECTOR ASSEMBLY/DELIVERY PIPE
ASSEMBLY INSTALLATION
1. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the delivery pipe assembly.
2. While being careful not to damage the O-ring, turn the
fuel injector assembly to the left and right and connect
it to the delivery pipe assembly. After connecting, check
that the fuel injector turns smoothly.
3. If the fuel injector does not turn smoothly, the cause may
be that the O-ring is getting caught. Remove the fuel
injector, check the O-ring for damage and re-connect the
fuel injector to the delivery pipe assembly and then
re-check.
 GDI – Injector 13A-117
4. Align the mating marks on the delivery pipe assembly
Fuel injector and the fuel injector, and then install the delivery pipe
assembly with the injector assembly still attached.

Mat-
ing
marks Delivery pipe
assembly

"CA BACK-UP RING B/O-RING/BACK-UP RING A

INSTALLATION
O-ring
Back-up ring A Install the back-up rings and the O-ring as shown in the
illustration.
Caution
1. Install the back-up ring B facing its cutaway surface
Cutaway toward the opposite side of the O-ring as shown in
surface the illustration.
Back-up ring B
2. Confirm the outer diameter of the back-up ring A. Take
care not to install the back-up ring for the fuel pressure
sensor by mistake. (Outer diameter of the back-up
ring A: 14.8 mm)

"DA FUEL RETURN PIPE/FUEL FEED PIPE

INSTALLATION
Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside the
fuel pump (high pressure), fuel pressure regulator (high
pressure) or the delivery pipe assembly.
13A-118 GDI – Throttle Body

THROTTLE BODY
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
D Engine Coolant Draining and Supplying (Refer to
GROUP 14 – On-vehicle Service.)
D Engine Cover Removal and Installation
D Air Intake Hose Removal and Installation

10 – 13
Nm

3
1

Removal steps
1. Throttle valve control servo connec- 3. Water hose connection
tor "AA 4. Throttle body
2. Throttle position sensor connector 5. Throttle body gasket

INSTALLATION SERVICE POINT

"AA THROTTLE BODY INSTALLATION
If the throttle body is replaced, initialize the electronic-controlled
throttle valve system.
Initialization
Turn on the ignition switch, and turn off it within one second.
Then leave it for at least ten seconds with the ignition switch
off.
 GDI – Throttle Body 13A-119
DISASSEMBLY AND REASSEMBLY

Disassembly steps
"AA 1. Throttle position sensor
2. Throttle body

REASSEMBLY SERVICE POINTS

"AA THROTTLE POSITION SENSOR
(1) Position the throttle position sensor on the throttle body
along the dotted line as shown in the illustration.
(2) Rotate the throttle position sensor anticlockwise as shown
in the illustration, and then tighten the screws.

(3) Measure resistance value between terminal Nos. 1(sensor

Throttle posi-
power supply) and 2(throttle position sensor 1st-channel
Earth tion sensor output) as well as 1(sensor power supply) and 4(throttle
Sensor power
supply (2nd channel) position sensor 2nd-channel output).
output
Normal condition

Open the throttle valve slowly Resistance value changes

from the idle position to smoothly in response to
full-open position. throttle valve opening angle.
Throttle position sensor
(1st channel) output (4) If the resistance value does not change smoothly, replace
the throttle position sensor.
13A-120 GDI – Injector Driver

INJECTOR DRIVER
REMOVAL AND INSTALLATION

9 Nm or 5 Nm*

4
5 Nm

5 Nm

Removal steps
AA" 1. Injector driver connector NOTE
AB" 2. Injector driver Tightening torque marked with * is for earth bolts (head
3. Injector driver control relay marking: E).
4. Bracket

REMOVAL SERVICE POINTS

AA" INJECTOR DRIVER CONNECTOR
DISCONNECTION
Press the injector driver connector in the place shown in the
illustration to disconnect the injector driver connector.
Caution
Disconnect the negative battery cable from its terminal
before carrying out this operation.
 GDI – Injector Driver/Throttle Valve Controller 13A-121
AB" INJECTOR DRIVER REMOVAL
Caution
The injector driver will become hot after the vehicle has
been driven, so take care when handling it.

THROTTLE VALVE CONTROLLER

INSTALLATION SERVICE POINT
If the throttle valve controller is replaced, initialize the
electronic-controlled throttle valve system.
Initialization
Turn on the ignition switch, and turn off it within one second.
Throttle valve controller Then leave it for at least ten seconds with the ignition switch
off.
NOTES
13A-2

GASOLINE DIRECT
INJECTION (GDI)
CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Fuel Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Outline of Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Component Location . . . . . . . . . . . . . . . . . . . . . . . 126
Accelerator Pedal Position Sensor Check . . . . 127
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 3
Accelerator Pedal Position Switch Check . . . . 127
SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . . 5 Oxygen Sensor Check . . . . . . . . . . . . . . . . . . . . . 128

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 6 FUEL PUMP (HIGH PRESSURE) . . . . . . . . . . 130

ON-VEHICLE SERVICE . . . . . . . . . . . . . . . . . . . 121 FUEL INJECTOR . . . . . . . . . . . . . . . . . . . . . . . . 133

Accelerator Pedal Position Sensor
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 THROTTLE BODY . . . . . . . . . . . . . . . . . . . . . . . . 137
Fuel Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . 122
 GDI – General/General Information 13A-3
GENERAL
OUTLINE OF CHANGES
Due to the changes shown below, the service procedures regarding the different description from the
previous version have been established.
 On-board Diagnostics System has been adopted to expand the diagnostic items and to change diagnosis
code numbering system.
 Fuel pressure regulator (high-pressure) incorporate fuel pump (high-pressure) has been adopted.
 An oxygen sensor (rear) has been added.
 A ignition failure sensor has been added.
 Lead cables of the crank angle sensor have been contained in the timing belt cover.
 An accelerator pedal position sensor attached to the accelerator pedal has been adopted.
 An engine-ECU has been changed.(Change of terminal layout) <Vehicles with M/T>
 An engine-A/T-ECU has been adopted. <Vehicles with A/T>

GENERAL INFORMATION
SELF-DIAGNOSIS FUNCTION
Following functions have been added.
 The engine-ECU records the engine operating condition when the diagnosis code is set.
This data is called “freeze frame” data.
This data can be read by using the MUT-II, are can then be used in simulation tests for troubleshooting.

GENERAL SPECIFICATIONS
Items Specifications

Engine-ECU <M/T> Identification No. E2T72675

Engine-A/T-ECU <A/T> Identification No. E2T77572

13A-4 GDI – General Information

GASOLINE DIRECT INJECTION SYSTEM DIAGRAM

1 Oxygen sensor  Power supply 1 Injector driver  Engine control relay
(front)  Ignition switch-IG (injector)  Fuel pump relay
2 Oxygen sensor  Ignition switch-ST 2 EGR valve  Injector driver relay
(rear)  Accelerator pedal position (stepper motor)  Throttle control
3 Air flow sensor sensor (1st channel) 3 Purge control servo relay
4 Intake air tempera-  Accelerator pedal position solenoid valve  A/C relay
ture sensor switch Engine-
 Ignition coil
5 Throttle position  Vehicle speed sensor ECU
<M/T> or  Fan controller
sensor (2nd chan-  A/C switch 1 engine-  Engine warning
nel)  A/C switch 2 A/T-ECU lamp
 M/T oil temperature <A/T>
 GDI ECO indicator
6 Camshaft position
sensor <M/T> lamp
sensor  Inhibitor switch <A/T>
7 Crank angle sensor  Diagnosis output
 Power steering fluid  Alternator G termi-
8 Barometric pres- pressure switch
sure sensor nal
 Alternator FR signal  Throttle valve
9 Engine coolant tem-  Stop lamp switch
perature sensor controller
 Small lamp switch  Oxygen sensor
10 Detonation sensor  Clutch switch <M/T> heater
11 Fuel pressure sen-  Brake vacuum sensor
sor  Injector open circuit check
signal
 Throttle valve controller

12 Throttle position  Power supply 4 Throttle valve  Engine-ECU<M/T>

sensor (1st channel)  Ignition switch-IG Throttle control servo  Engine-A/T-ECU
valve
 Accelerator pedal position controller
<A/T>
sensor (2nd channel)
 Engine-ECU <M/T>
 Engine-A/T-ECU <A/T>

4 Intake air temperature sensor

From fuel pump
(low-pressure) 5 Throttle position sensor (2nd channel)
12 Throttle position sensor (1st channel) 3 Air flow sensor
To fuel tank 4 Throttle control servo
8 Barometric pressure
sensor
11 Fuel pressure sensor
6 Camshaft
position sensor

2 EGR valve

Fuel pump Canister

(high-pressure)
Injector 1 Injector
driver
9 Engine coolant temperature sensor

10 Detonation sensor 3 Purge control

solenoid valve
1 Oxygen sensor (front)
2 Oxygen sensor (rear)

7 Crank angle sensor

 GDI – Service Specifications 13A-5
SERVICE SPECIFICATIONS
Items Standard value

Adjustment voltage of accelerator pedal position sensor 0.985 – 1.085

(1st and 2nd channel) V

Resistance of accelerator pedal position sensor 3.5 – 6.5

(1st and 2nd channel) kΩ

Fuel pressure High-pressure side MPa 4 – 6.9

Low-pressure side kPa Approximately 329

Oxygen sensor output voltage (during revving) V 0.6 – 1.0

Oxygen sensor heater resistance (at 20C) Ω Front 4.5 – 8.0

Rear 11 – 18
13A-6 GDI – Troubleshooting

TROUBLESHOOTING
DIAGNOSIS FUNCTION
Engine warning lamp
(check engine lamp) ENGINE WARNING LAMP (CHECK ENGINE LAMP)
If an abnormality occurs in any of the following items related
to the GDI system, the engine warning lamp will illuminate
or flash. If the lamp remains illuminated or if the lamp illuminates
while the engine is running, check the diagnosis code output.
However, the warning lamp will illuminate as bulb check for
five seconds whenever the ignition switch is turned to the
ON position.

Engine warning lamp inspection items

Code No. Diagnosis item

– Engine-ECU <M/T> or engine-A/T-ECU <A/T>

P0100 Air flow sensor system

P0105 Barometric pressure sensor system

P0110 Intake air temperature sensor system

P0115 Engine coolant temperature sensor system

P0120 Throttle position sensor (1st channel) system

P0125 Feedback system

P0130 Oxygen sensor (front) system <sensor 1>

P0135 Oxygen sensor heater (front) system <sensor 1>

P0136 Oxygen sensor (rear) system <sensor 2>

P0141 Oxygen sensor heater (rear) system <sensor 2>

P0170 Abnormal fuel system

P0190 Abnormal fuel pressure

P0201 No. 1 injector system

P0202 No. 2 injector system

P0203 No. 3 injector system

P0204 No. 4 injector system

P0220 Accelerator pedal position sensor (1st channel) system

P0225 Throttle position sensor (2nd channel) system

P0300 Ignition coil (power transistor) system

P0301 No. 1 cylinder misfire detected

P0302 No. 2 cylinder misfire detected

P0303 No. 3 cylinder misfire detected

P0304 No. 4 cylinder misfire detected

 GDI – Troubleshooting 13A-7

Code No. Diagnosis item

P0335 Crank angle sensor system

P0340 Camshaft position sensor system

P0403 EGR valve system

P0420 Catalyst malfunction

P0443 Purge control solenoid valve system

P1200 Injector driver system

P1220 Electronic-controlled throttle valve system

P1221 Throttle valve position feedback system

P1223 Communication line with throttle valve controller

P1224 Throttle valve control servo motor (motor 1st phase malfunction) system

P1225 Accelerator pedal position sensor (2nd channel) system

P1228 Throttle valve control servo motor (motor 2nd phase malfunction) system

P1515 Brake vacuum sensor system

NOTE
1. If the engine warning lamp illuminates because of a malfunction of the engine-ECU (engine-A/T-ECU),
communication between MUT-II and the engine-ECU (engine-A/T-ECU) is impossible. In this case,
the diagnosis code cannot be read.
2. After the engine-ECU (engine-A/T-ECU) has detected a malfunction, the engine warning lamp illuminates
when the engine is next turned on and the same malfunction is re-detected. However, for items marked
with a “” in the diagnosis code number column, the engine warning lamp illuminates only on the
first detection of the malfunction.
As for P1220, P1221, P1223, P1224, and P1228, the engine warning lamp flashes. If malfunctions
are detected at the throttle position sensor (1st channel) and the throttle position sensor (2nd channel)
at the same time, or malfunctions are detected at the accelerator pedal position sensor (1st channel)
and the accelerator pedal position sensor (2nd channel) at the same time, the engine warning lamp
will flash.
3. After the engine warning lamp illuminates, it will be switched off under the following conditions.
(1) When the engine-ECU (engine-A/T-ECU) monitored the power train malfunction three times* and
met set condition requirements, it detected no malfunction.
*: In this case, “one time” indicates from engine start to stop.
(2) For misfiring malfunction, when driving conditions (engine speed, engine coolant temperature, etc.)
are similar to those when the malfunction was first recorded.
4. Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.
13A-8 GDI – Troubleshooting

METHOD OF READING AND ERASING DIAGNOSIS

CODES
Refer to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.

DIAGNOSIS USING DIAGNOSIS 2 MODE

1. Switch the diagnosis mode of the engine control unit to
DIAGNOSIS 2 mode using the MUT-II.
2. Carry out a road test.
3. Take a reading of the diagnosis code and repair the problem
location.
4. Turn the ignition switch to OFF and then back to ON again.
NOTE
By turning the ignition switch to OFF, the engine-ECU
<M/T> or engine-A/T-ECU <A/T> will switch the diagnosis
mode from DIAGNOSIS 2 mode to DIAGNOSIS 1 mode.
5. Erase the diagnosis codes.

INSPECTION USING MUT-II DATA LIST AND

ACTUATOR TESTING
1. Carry out inspection by means of the data list and the
actuator test function. If there is an abnormality, check
and repair the chassis harnesses and components.
2. After repairing, re-check using the MUT-II and check that
the abnormal input and output have returned to normal
as a result of the repairs.
3. Erase the diagnosis code memory.
4. Remove the MUT-II, and then start the engine again and
carry out a road test to confirm that the problem has
disappeared.
GDI – Troubleshooting 13A-9
FREEZE FRAME DATA
When the engine-ECU <M/T> or engine-A/T-ECU <A/T>
detects a malfunction and stores a diagnosis code, it also
stores a current status of the engine. This function is called
“Freeze frame data.” By analyzing this “freeze frame” data
with the MUT-II, an effective troubleshooting can be performed.

The display items of freeze frame data are shown below.

Display item list

Data item Unit

Engine coolant temperature sensor C

Engine speed r/min

Vehicle speed km/h

Long-term fuel compensation (long-term %

fuel trim)

Short-term fuel compensation (short-term %

fuel trim)

Fuel control condi- Open loop OL

tion
Closed loop CL

Open loop owing to OL-DRV.

drive condition

Open loop owing to OL-SYS.

system malfunction

Closed loop based CL-H02S

on one oxygen sen-
sor

Calculation load value %

Diagnosis code during data recording –

NOTE
If malfunctions have been detected in multiple systems, store
one malfunction only, which has been detected first.

READINESS TEST STATUS

The engine-ECU <M/T> or engine-A/T-ECU <A/T> monitors
the following main diagnosis items, judges if these items are
in good condition or not, and the stores its history. This history
can be read out by using MUT-II. (If the ECU has judged
a item before, the MUT-II displays “Complete.”)
In addition, if diagnosis codes are erased or the battery cable
is disconnected, this history will also be erased (the memory
will be reset).
 Catalyst: P0420
 Oxygen sensor: P0130
 Oxygen sensor heater: P0135, P0141
13A-10 GDI – Troubleshooting

FAIL-SAFE FUNCTION REFERENCE TABLE

When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled by
means of the pre-set control logic to maintain safe conditions for driving.
Malfunctioning item Control contents during malfunction

Air flow sensor 1. Suspends lean burn operation.

2. Uses the throttle position sensor signal and engine speed signal (crank angle
sensor signal) to take reading of the basic injector drive time and basic ignition
timing from the pre-set mapping.

Intake air temperature sensor Controls as if the intake air temperature is 25C.

Throttle position sensor (2nd 1. Suspends lean burn operation.

channel) 2. Controls the throttle opening angle feedback (half as much as the opening
rate in the normal condition) by using signals from the throttle position sensor
(1st channel). However, this controlling system is not applied if the throttle
position sensor (1st channel) and throttle position sensor (2nd channel)
combination output voltage is outside 4 – 6 V.
3. Refrains from controlling the throttle opening angle feedback if the throttle
position sensor (1st channel) is also defective.

Engine coolant temperature Controls as if the engine coolant temperature is 80C. (Moreover, the control system
sensor is working until the ignition switch is turned OFF if the sensor signal returns to normal.)

Camshaft position sensor Controls maintaining the condition before determined as failure.
Fuel will be cut-off 4 seconds after a malfunction is detected. (However, only if
No. 1 cylinder TDC has never been detected after the ignition switch is turned
to the ON position)

Vehicle speed sensor 1. Suspends lean burn operation. However, the control is cancelled as a certain
time passes by with the engine speed of 1,500 r/min or more.
2. Suspends lean burn operation during the engine idling.

Barometric pressure sensor Controls as if the barometric pressure is 101 kPa.

Detonation sensor Fixes the ignition timing as that for standard petrol.

Injector 1. Suspends lean burn operation.

2. Suspends the exhaust gas recirculation.

Ignition coil (incorporating pow- 1. Suspends lean burn operation.

er transistor) 2. Cuts off the fuel supply to cylinders with an abnormal ignition signal.

Fuel pressure sensor 1. Controls as if the fuel pressure is 5 MPa. (In case of open/short circuit)
2. Turns the fuel pump relay off. (In case of abnomality in high pressure)
3. Suspends fuel injection. (when the low pressure is detected and the engine
speed is more than 3,000 r/min)

Alternator FR terminal Refrains from controlling to suppress the alternator output to electrical load.
(Operated as a normal alternator)

Accelerator pedal position sen- 1. Suspends lean burn operation.

sor (2nd channel) 2. Controls the throttle valve position by using signals from the accelerator pedal
position sensor (1st channel). (However, the control system is not applicable
if the difference from the accelerator pedal position sensor (1st channel) output
voltage is 1.0 V or higher.)
3. Suspends the electronic controlled throttle valve system if accelerator pedal
position sensor (1st channel) is also defective.
 GDI – Troubleshooting 13A-11

Malfunctioning item Control contents during malfunction

Accelerator pedal position sen- 1. Suspends lean burn operation.

sor (1st channel) 2. Controls the throttle valve position by using signals from the accelerator pedal
position sensor (2nd channel). (However, this control is not applicable if the
voltage difference between the accelerator pedal position sensor (1st channel)
and accelerator pedal position sensor (2nd channel) is 1.0 V or higher.)
3. Also suspends the electronic-controlled throttle valve system when the
accelerator pedal position sensor (2nd channel) is defective.

Throttle position sensor (1st 1. Suspends lean burn operation.

channel) 2. Controls throttle opening angle feedback by using signals from throttle position
sensor (2nd channel). (However, the controlling system is not applied when
the throttle position sensor (1st channel) and throttle position sensor (2nd
channel) combination output voltage is outside 4 – 6 V.)
3. Refrains from controlling the throttle opening angle feedback when throttle
position sensor (2nd channel) is also defective.

Electronic-controlled throttle 1. Suspends the electronic controlled throttle valve system.

valve system 2. Suspends lean burn operation.
3. Suspends the idle speed feedback control.

Throttle valve position feed- 1. Suspends the electronic controlled throttle valve system.
back 2. Suspends lean burn operation.
3. Suspends the engine speed feedback control.

Communication line between 1. Communication error between the throttle valve controller and the engine-ECU
the throttle valve controller and <M/T> or engine-A/T-ECU <A/T>:
the engine-ECU <M/T> or  Suspends lean burn operation.
engine-A/T-ECU <A/T>  Cuts the fuel supply when the engine speed reaches 3,000 r/min or more.
 Suspends the cruise-control.
2. Communication error between the throttle valve controller and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>:
 Suspends lean burn operation.
 Cuts the fuel supply when the engine speed reaches 3,000 r/min or more.
 Suspends the cruise-control.
 The throttle valve controller controls the throttle valve opening angle by
using signals from accelerator pedal position sensor (2nd channel).

Throttle control servo motor 1st Bans lean burn operation.

phase malfunction

Throttle control servo motor 1. Suspends electronic control throttle valve system.
2nd phase malfunction 2. Bans lean burn operation.
3. Bans engine speed feed back control.

Misfiring If the detected misfiring causes damage to the catalyst, the misfiring cylinder will be
shut down.

NOTE
If the electronic-controlled throttle valve system is suspended, the engine warning lamp will illuminate.
13A-12 GDI – Troubleshooting

INSPECTION CHART FOR DIAGNOSIS CODES

Code No. Diagnosis item Reference page

P0100 Air flow sensor system 13A-14

P0105 Barometric pressure sensor system 13A-16

P0110 Intake air temperature sensor system 13A-18

P0115 Engine coolant temperature sensor system 13A-19

P0120 Throttle position sensor 1 (1st channel) system 13A-22

P0125 Feedback system 13A-24

P0130 Oxygen sensor (front) system <sensor 1> 13A-26

P0135 Oxygen sensor heater (front) system <sensor 1> 13A-28

P0136 Oxygen sensor (rear) system <sensor 2> 13A-29

P0141 Oxygen sensor heater (rear) system <sensor 2> 13A-31

P0170 Abnormal fuel system 13A-32

P0190 Abnormal fuel pressure 13A-34

P0201 No. 1 injector system 13A-35

P0202 No. 2 injector system 13A-37

P0203 No. 3 injector system 13A-38

P0204 No. 4 injector system 13A-39

P0220 Accelerator pedal position sensor (1st channel) system 13A-41

P0225 Throttle position sensor (2nd channel) system 13A-44

P0300 Ignition coil (power transistor) system 13A-45

P0301 No. 1 cylinder misfire detected 13A-47

P0302 No. 2 cylinder misfire detected 13A-47

P0303 No. 3 cylinder misfire detected 13A-47

P0304 No. 4 cylinder misfire detected 13A-47

P0325 Detonation sensor system 13A-48

P0335 Crank angle sensor system 13A-48

P0340 Camshaft position sensor system 13A-50

P0403 EGR valve system 13A-52

P0420 Catalyst malfunction 13A-54

P0443 Purge control solenoid valve system 13A-55

P0500 Vehicle speed sensor system 13A-56

P1200 Injector driver system 13A-56

P1220 Electronic-controlled throttle valve system 13A-57

 GDI – Troubleshooting 13A-13

Code No. Diagnosis item Reference page

P1221 Throttle valve position feedback system 13A-58

P1223 Communication line with throttle valve controller 13A-59

P1224 Throttle valve control servo motor (motor 1st phase malfunction) system 13A-60

P1225 Accelerator pedal position sensor (2nd channel) system 13A-61

P1228 Throttle valve control servo motor (motor 2nd phase malfunction) system 13A-63

P1500 Alternator FR terminal system 13A-64

P1515 Brake vacuum sensor system 13A-65

P1610 Immobilizer system 13A-67

NOTE
1. Do not replace the engine-ECU <M/T> or engine-A/T-ECU <A/T> until a through terminal check reveals
there are no short/open circuit.
2. Check that the engine-ECU <M/T> or engine-A/T-ECU <A/T> earth circuit is normal before checking
for the cause of the problem.
3. After the engine-ECU <M/T> or engine-A/T-ECU <A/T> has detected a malfunction, a diagnosis code
is recorded the next time the engine is started and the same malfunction is re-detected. However,
for items marked with a “”, the diagnosis code is recorded on the first detection of the malfunction.
4. Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.
13A-14 GDI – Troubleshooting

INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE

Code No. P0100 Air flow sensor system Probable cause
Range of Check  Malfunction of air flow sensor
 Engine speed: 500 r/min or more  Open or short circuit in air flow sensor circuit or
Set Conditions loose connector contact
 The sensor output frequency is 3.3 Hz or less for four seconds.  Malfunction of engine-ECU <M/T>
 Malfunction of engine-A/T-ECU <A/T>

OK
MUT-II Data list Transient malfunction
12 Air flow sensor (Refer to (Refer to GROUP 00 – Points to
P.13A-99, DATA LIST REFERENCE Note for Intermittent Malfunctions.)
TABLE.)
NG
NG
Check the following connector: Repair
A-73
OK
(1) NG OK
Measure at air flow sensor Measure at engine-ECU connector Check the following connectors:
connector A-73. B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
 Disconnect the connector and connector B-85 <A/T>.
NG
 Measure the voltage at the OK
measure at the harness side. Repair
(1) Voltage between terminal 3 and engine-ECU terminal <M/T> or
earth (Ignition switch: ON) engine-A/T-ECU terminal <A/T>.
OK: 4.8 – 5.2 V  Ignition switch: ON Check the harness between the air
(2) Voltage between terminal 4 and  Voltage between terminal 61 flow sensor and the engine-ECU
earth (Ignition switch: ON) <M/T>, 65 <A/T> and earth <M/T> or engine-A/T-ECU <A/T>,
OK: System voltage OK: 4.8 – 5.2 V and repair if necessary.
(3) Resistance between terminal 5
and earth NG
OK: 2 Ω or less NG
Check the following connectors: Repair
B-86 <M/T>, B-85 <A/T>
OK

Check the harness between the air NG

flow sensor and the engine-ECU Repair
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(2) NG NG
Check the following connector: Repair
B-26
OK
Check the harness between the air
flow sensor and the engine control
relay, and repair if necessary.
(3) NG NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK OK

Check the harness between the air NG

Repair
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

To the next page

 GDI – Troubleshooting 13A-15
From the previous page
OK
NG NG
Measure at air flow sensor Check the following connectors: Repair
connector A-73. B-87 <M/T>, B-84 <A/T>
 Use test harness (MB991709) to OK
connect the connector, and
measure at the pick-up harness. NG
Check the harness between the air
 Ignition switch: ON Repair
flow sensor and the engine-ECU
 Voltage between terminal 7 and
<M/T> or engine-A/T-ECU <A/T>.
earth
OK: 7 – 8 V OK
OK Replace the air flow sensor.

NG NG
Measure at air flow sensor Check the following connectors: Repair
connector A-73. B-87 <M/T>, B-84 <A/T>
 Use test harness (MB991709) to
OK
connect the connector, and NG
measure at the pick-up harness. Check the harness between the air Repair
 Selector lever position: P flow sensor and the engine-ECU
 Voltage between terminal 7 and <M/T> or engine-A/T-ECU <A/T>.
earth
OK: Engine: Idling OK
0 – 1 V
Engine speed: 3,000 r/min Check the trouble symptoms.
6 – 9 V NG
OK Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NG
Measure the output wave form at Replace the air flow sensor.
air flow sensor connector A-73 (by
using an analyzer).
 Use test harness (MB991709) to Check the trouble symptoms.
connect the connector, and
measure at the pick-up harness. NG
 Engine: Idling NG
 Voltage between terminal 3 and Check the following connectors: Repair
earth B-86 <M/T>, B-85 <A/T>
OK
OK: Waveforms should be dis- OK
played on P.13A-118 (In-
spection Procedure Using Check the harnesses between the
an Analyzer) and noise air flow sensor and the engine-ECU
should not be displayed in <M/T> or engine-A/T-ECU <A/T>
the waveform. and between the air flow sensor
OK and the engine control relay, and
repair if necessary.

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-16 GDI – Troubleshooting

Code No. P0105 Barometric pressure sensor system Probable cause

Range of Check  Malfunction of barometric pressure sensor
 Two seconds have passed since the ignition switch is turned ON or the  Open or short circuit in barometric pressure
engine starting process is completed. sensor circuit or loose connector contact
 Battery voltage: 8 V or more  Malfunction of engine-ECU <M/T>
Set Conditions  Malfunction of engine-A/T-ECU <A/T>
 The sensor output voltage is 4.5 V or more for four seconds (equivalent to
114 kPa of barometric pressure)
or
 The sensor output voltage is 0.2 V or less (equivalent to 53 kPa of
barometric pressure)

OK
MUT-II Data list Transient malfunction
25 Barometric pressure sensor (Refer to GROUP 00 – Points to
(Refer to P.13A-99, DATA LIST Note for Intermittent Malfunctions.)
REFERENCE TABLE.)
NG
Check the following connector: NG
A-73 Repair
OK
(1) NG
Measure at air flow sensor Measure at engine-ECU connector OK Check the following connector:
connector A-73. B-86 <M/T> or engine-A/T-ECU B-86
 Disconnect the connector and connector B-86 <A/T>. OK NG
measure at the harness side.  Measure the voltage at the Repair
(1) Voltage between terminal 1 and engine-ECU terminal <M/T> or
earth (Ignition switch: ON) engine-A/T-ECU terminal <A/T>. Check the harness between the air
OK: 4.8 – 5.2 V  Ignition switch: ON flow sensor and the engine-ECU
(2) Resistance between terminal 5  Voltage between terminal 41 <M/T> or engine-A/T-ECU <A/T>,
and earth <M/T>, 87 <A/T> and earth and repair if necessary.
OK: 2 Ω or less OK: 4.8 – 5.2 V
NG
Check the following connector: NG
Repair
B-86
OK
Check the harness between the air NG
Repair
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

(2) NG NG
Check the following connectors: Repair
B-87 <M/T>, B-86<A/T>
OK

Check the harness between the air NG Repair

OK flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
To the next page engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-17
From the previous page

OK

(1) NG NG
Measure at air flow sensor Check the following connector: Repair
connector A-73. B-86
 Connect connector terminals No.
1, No. 2 and No. 5 only by OK
using test harness (MB991709), Check the harness between the air
and measure at the pick-up flow sensor and the engine-ECU
harness. <M/T> or engine-A/T-ECU <A/T>,
 Ignition switch: ON and repair if necessary.
(1) Voltage between terminal 1 and
earth
OK: 4.8 – 5.2 V (2) NG
Replace the air flow sensor.
(2) Voltage between terminal 2 and
earth
OK: Altitude 0 m: 3.7 – 4.3 V
Altitude 1,200 m: Check the trouble symptoms.
3.2 – 3.8 V (3) NG NG
(3) Voltage between terminal 5 and
earth NG
Check the following connectors: Repair
OK: 0.5 V or less B-86 <M/T>, B-85 <A/T>
OK OK

Check the harness between the air

flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.

NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.

NG
Measure at engine-ECU connector Check the following connectors:
B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B–85<A/T>
connector B-85 <A/T>.
OK
 Measure the voltage at the
engine-ECU terminal <M/T> or NG
engine-A/T-ECU terminal <A/T>. Check the harness between the air Repair
 Ignition switch: ON flow sensor and the engine-ECU
 Voltage between terminal 51 <M/T> or engine-A/T-ECU <A/T>,
<M/T>, 65 <A/T> and earth and repair if necessary.
OK: Altitude 0 m: 3.7 – 4.3 V OK
Altitude 1,200 m: Check the following connectors: NG
Repair
3.2 – 3.8 V B-86 <M/T>, B-87<A/T>
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-18 GDI – Troubleshooting

Code No. P0110 Intake air temperature sensor system Probable cause
Range of Check  Malfunction of intake air temperature sensor
 Two seconds have passed since the ignition switch is turned ON or the  Open or short circuit in intake air temperature
engine starting process is completed. sensor or loose connector contact
Set Conditions  Malfunction of engine-ECU <M/T>
 The sensor output voltage is 4.6 V or more for four seconds (equivalent to  Malfunction of engine-A/T-ECU <A/T>
–45C of intake air temperature)
or
 The sensor output voltage is 0.2 V or more for four seconds (equivalent to
125C of intake air temperature)

MUT-II Data list OK Transient malfunction

13 Intake air temperature sensor (Refer to GROUP 00 – Points to
OK: Roughly the same as am- Note for Intermittent Malfunctions.)
bient temperature.
NG
NG
Check the intake air temperature Repair
sensor itself.
(Refer to P.13A-105*.)
OK
NG
Check following connector: A-73 Repair
OK
(1) NG NG
Measure at air flow sensor Check the following connectors: Repair
connector A-73. B-87 <M/T>, B-86 <A/T>
 Disconnect the connector and OK
measure at the harness side.
(1) Resistance between terminal 5 Check the harness between the air NG
and earth Repair
flow sensor and the engine-ECU
OK: 2 Ω or less <M/T> or engine-A/T-ECU <A/T>.
(2) Voltage between terminal 6 and
OK
earth
(Ignition switch: ON) NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
OK: 4.8 – 5.2 V engine-A/T-ECU <A/T>.

(2) NG OK
Measure at engine-ECU connector Check the following connectors:
B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
connector B-85 <A/T>. NG
 Measure the voltage at the OK
Repair
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.
 Disconnect connector A-73. Check the harness between the air
 Ignition switch: ON flow sensor and the engine-ECU
 Voltage between terminal 62 <M/T> or engine-A/T-ECU <A/T>,
<M/T>, 64 <A/T> and earth and repair if necessary.
OK: 4.8 – 5.2 V
NG

Check the following connectors: NG

B-86 <M/T>, B-85 <A/T> Repair

OK
OK NG
Check the harness between the air Repair
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
To the next page engine-A/T-ECU <A/T>.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1).
 GDI – Troubleshooting 13A-19
From the previous page
OK
NG NG
Measure at air flow sensor Check the following connectors: Repair
connector A-73. B-86, B-87 <M/T>, B-85, B-86 <A/T>
 Use the test harness
(MB991709) to connect only OK
terminals 5 and 6, and then Check the harness between the air
measure at the pick-up harness. flow sensor and the engine-ECU
 Ignition switch: ON <M/T> or engine-A/T-ECU <A/T>,
 Voltage between terminal 6 and and repair if necessary.
earth
OK: Ambient temperature 0C:
3.2 – 3.8 V
Ambient temperature 20C:
2.3 – 2.9 V
Ambient temperature 40C:
1.5 – 2.1 V
Ambient temperature 80C:
0.4 – 1.0 V
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

Code No. P0115 Engine coolant temperature sensor Probable cause

system
Range of Check  Malfunction of engine coolant temperature sensor
 Engine: Two seconds after the engine has been started  Open or short circuit in the engine coolant
Set Conditions temperature sensor circuit or loose connector
 The sensor output voltage is 4.6 V or more for four seconds (equivalent to contact
–45C of engine coolant temperature)  Malfunction of engine-ECU <M/T>
or  Malfunction of engine-A/T-ECU <A/T>
 The sensor output voltage is 0.1 V or less for four seconds (equivalent to
140C of engine coolant temperature)
Range of Check
 Engine: After starting
Set Conditions
 The engine coolant temperature has reduced from over 40C to less than
40C, and that condition has lasted for five minutes or more.
13A-20 GDI – Troubleshooting

OK
MUT-II Data list Transient malfunction
21 Engine coolant temperature (Refer to GROUP 00 – Points to
sensor Note for Intermittent Malfunctions.)
OK: When the engine is cold,
the temperature is roughly
the same as ambient tem-
perature. If warm, it is 80
– 120C.
NG
NG
Measure at engine coolant Replace
temperature sensor connector A-76.
 Disconnect the connector and
measure at the harness side.
 Resistance between terminals 1
and 2
OK: At 20C of engine coolant
temperature: 2.1 – 2.7 kΩ
At 80C of engine coolant
temperature: 0.26 – 0.36
kΩ
OK

Check the following connector: NG

A-76 Repair

OK
(1) NG OK
Measure at engine coolant Measure at engine-ECU connector Check the following connector:
temperature sensor connector A-76. B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
 Disconnect the connector and connector B-85 <A/T>.
measure at the harness side.  Measure the voltage at the OK NG
engine-ECU terminal <M/T> or Repair
(1) Voltage between terminal 1 and
earth engine-A/T-ECU terminal <A/T>.
(Ignition switch: ON)  Disconnect connector A-76. Check the harness wire between
OK: 4.8 – 5.2 V  Ignition switch: ON the engine coolant temperature
(2) Resistance between terminal 2  Voltage between terminal 44 and sensor and the engine-ECU <M/T>
and earth earth or engine-A/T-ECU <A/T>, and
OK: 2 Ω or less OK: 4.8 – 5.2 V repair if necessary.
NG

Check the following connectors: NG

B-86 <M/T>, B-85 <A/T> Repair

OK
Check the harness wire between
the engine coolant temperature NG
Repair
sensor and the engine-ECU <M/T>
or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(2) NG NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK OK

Check the harness wire between NG

the engine coolant temperature Repair
sensor and the engine-ECU <M/T>
or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
To the next page engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-21
From the previous page
OK
NG NG
Measure at engine coolant Check the engine coolant Repair
temperature sensor connector A-76. temperature sensor.
 Use test harness (MB991658) to (Refer to P.13A-106*.)
connect the connector, and
measure at the pick-up harness. OK
NG
 Ignition switch: ON Check the following connectors: Repair
 Voltage between terminal 1 and B-86, B-87 <M/T>, B-85, B-86 <A/T>
earth
OK: At 0C of engine coolant OK
temperature: 3.2 – 3.8 V
At 20C of engine coolant Check the harness wire between
temperature: 2.3 – 2.9 V the engine coolant temperature
At 40C of engine coolant sensor and the engine-ECU <M/T>
temperature: 1.3 – 1.9 V or engine-A/T-ECU <A/T>, and
At 80C of engine coolant repair if necessary.
temperature: 0.3 – 0.9 V
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1).
13A-22 GDI – Troubleshooting

Code No. P0120 Throttle position sensor (1st channel) Probable cause
system
The throttle valve controller judges a malfunction, and then transmit the result  Malfunction of throttle position sensor
to the engine-ECU <M/T> or engine-A/T-ECU <A/T>.  Open or short circuit in the throttle position
Range of Check sensor (1st channel) circuit or loose connector
 Ignition switch: ON contact
Set Conditions  Malfunction of throttle valve controller
 The sensor output voltage is 0.2 V or less.  Malfunction of engine-ECU <M/T>
or  Malfunction of engine-A/T-ECU <A/T>
 The sensor output voltage is 4.9 V or more.
or
 The throttle position sensor (1st channel) and throttle position sensor (2nd
channel) combination output voltage is outside 4 – 6 V.
or
 The output voltage of the throttle position sensor (1st channel) is
significantly different (approx. 1V) from the throttle valve opening angle
(voltage), whitch the engine-ECU <M/T> or engine-A/T-ECU <A/T> request
the throttle valve controller.

OK
MUT-II Data list Transient malfunction
79 Throttle position sensor (1st (Refer to GROUP 00 – Points to
channel) (Refer to P.13A-99, Note for Intermittent Malfunctions.)
DATA LIST REFERENCE
TABLE.)
NG
NG
Check the throttle position sensor. Replace
(Refer to P.13A-106*.)
OK
NG
Check the following connector: Repair
A-66

OK
(1) NG OK
Measure at throttle position sensor Measure at throttle valve controller Check the following connector:
connector A-66. connector B-15. B-15
 Disconnect the connector and  Measure voltage at the throttle
measure at the harness side. OK NG
valve controller connector
(1) Voltage between terminal 1 and Repair
terminals.
earth  Ignition switch: ON
(Ignition switch: ON)  Voltage between terminal 6 and Check the harness wire between
OK: 4.8 – 5.2 V earth the throttle position sensor and the
(2) Resistance between terminal 3 OK: 4.8 – 5.2 V throttle valve controller, and repair if
and earth necessary.
OK: 2 Ω or less NG
NG
Check the following connector: Repair
B-15
OK
NG
Check the harness wire between Repair
the throttle position sensor and the
throttle valve controller.
OK
NG
Check the trouble symptoms. Replace the throttle valve controller.

(2) NG NG
Check the following connector: Repair
B-15
OK
NG
OK Check the harness wire between Repair
the throttle position sensor and the
To the next page throttle valve controller.
OK
NG
Check the trouble symptoms. Replace the throttle valve controller.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 GDI – Troubleshooting 13A-23
From the previous page
OK
(1) NG NG
Measure at throttle position sensor Check the following connector: Repair
connector A-66. (3) NG B-15
 Use test harness (MB991536) to
connect the connector, and OK
measure at the pick-up harness.
 Ignition switch: ON Check the harness wire between
(1) Voltage between terminal 1 and the throttle position sensor and the
earth throttle valve controller, and repair if
OK: 4.8 – 5.2 V necessary.
(2) Voltage between terminal 2 and (2) NG
earth Adjust the throttle position sensor.
OK: Accelerator pedal fully re- (Refer to P.13A-96*.)
leased: 0.4 – 0.8 V
Accelerator pedal fully de-
pressed: 4.2 – 4.8 V NG
Check the following connector: Repair
(3) Voltage between terminal 3 and
B-15
earth
OK: 0.5 V or less OK

Check the harness wire between

the throttle position sensor and the
OK throttle valve controller, and repair if
necessary.
NG
Measure at throttle valve controller NG Check the following connector: Repair
connector B-15. B-15
 Measure voltage at the throttle OK
valve controller connector
terminals. Check the harness wire between
 Ignition switch: ON the throttle position sensor and the
 Voltage between terminal 7 and throttle valve controller, and repair if
earth necessary.
OK: Accelerator pedal fully re-
leased: 0.4 – 0.8 V OK NG
Accelerator pedal fully de- Check the following connector: Repair
pressed: 4.2 – 4.8 V B-15
OK

Check the trouble symptoms.

NG
Replace the throttle valve controller.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-24 GDI – Troubleshooting

Code No. P0125 Feedback system Probable cause

Range of Check  Malfunction of oxygen sensor (front)
 The engine coolant temperature is approx. 80C or more.  Open or short circuit in the oxygen sensor (front)
 During stoichiometric feedback control circuit or loose connector contact
 The vehicle is not being decelerated.  Malfunction of engine-ECU <M/T>
Set Conditions  Malfunction of engine-A/T-ECU <A/T>
 Oxygen sensor (front) output voltage has been higher or lower than 0.5 V
for at least thirty seconds.
 GDI – Troubleshooting 13A-25
NG
Check the following connector: Repair
A-55
OK
NG NG
Measure at oxygen sensor (front) Check the following connectors: Repair
connector A-55. B-87 <M/T>, B-86 <A/T>
 Disconnect the connector and OK
measure at the harness side. NG
 Resistance between terminal 2 Check the harness wire between Repair
and earth the oxygen sensor (front) and the
OK: 2 Ω or less engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
OK
Check the trouble symptoms.
NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.

(1) NG NG
Measure at oxygen sensor (front) Check the following connectors: Repair
connector A-55. B-87 <M/T>, B-86 <A/T>
 Use the test harness
OK
(MD998464) to connect the
connector, and measure at the
pick-up harness side. Check the harness wire between
 Engine: 2,500 r/min (after the oxygen sensor (front) and the
warming up) engine-ECU <M/T> or
(1) Voltage between terminal 2 and engine-A/T-ECU <A/T>, and repair if
earth necessary.
OK: 0.5 V or less
(2) Voltage between terminal 4 and (2) NG NG
Check the oxygen sensor (front). Replace
earth
OK: 0 V and 0.8 V alternate. (Refer to P.13A-128.)
OK
OK NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK

Check the harness wire between

the oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-87 <M/T> or engine-A/T-ECU B-87 <M/T>, B-86 <A/T>
connector B-86 <A/T>.
 Measure the voltage at the OK
engine-ECU terminal <M/T> or
Check the harness wire between
engine-A/T-ECU terminal <A/T>.
the oxygen sensor (front) and the
 Engine: 2,500 r/min (after
engine-ECU <M/T> or
warming up)
engine-A/T-ECU <A/T>, and repair if
 Voltage between terminal 71 and
necessary.
earth
OK: 0 V and 0.8 V alternate.
OK
NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK

OK
Check the trouble symptoms. Transient malfunction
(Refer to GROUP 00 – Points to
NG
Note for Intermittent Malfunctions.)
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
13A-26 GDI – Troubleshooting

Code No. P0130 Oxygen sensor (front) system Probable cause

<sensor 1>
Range of Check  Malfunction of oxygen sensor (front)
 Three minutes have been passed since the engine has been started.  Open or short circuit in the oxygen sensor (front)
 The engine coolant temperature is approx. 80C or more. circuit or loose connector contact
 Intake air temperature is 20 – 50C  Malfunction of engine-ECU <M/T>
 Engine speed is 1,200 r/min or more  Malfunction of engine-A/T-ECU <A/T>
 Driving on a level surface at constant speed.
Set Conditions
 The oxygen sensor (front) output voltage is 4.5 V or more when the sensor
output voltage is 0.2 V or less and a voltage of 5 V is applied to the
oxygen sensor (front) inside the engine-ECU.
Range of Check
 Engine speed is 3,000 r/min or less
 During driving
 During air/fuel ratio feedback control
Set Conditions
 The oxygen sensor (front) output frequency is five or less per 12 seconds
on average.
 GDI – Troubleshooting 13A-27
NG
Check the following connector: Repair
A-55
OK
NG NG
Measure at oxygen sensor (front) Check the following connectors: Repair
connector A-55. B-87 <M/T>, B-86 <A/T>
 Disconnect the connector and OK
measure at the harness side. NG
 Resistance between terminal 2 Check the harness wire between Repair
and earth the oxygen sensor (front) and the
OK: 2 Ω or less engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
OK
Check the trouble symptoms.
NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.

(1) NG NG
Measure at oxygen sensor (front) Check the following connectors: Repair
connector A-55. B-87 <M/T>, B-86 <A/T>
 Use the test harness OK
(MD998464) to connect the
connector, and measure at the Check the harness wire between
pick-up harness side. the oxygen sensor (front) and the
 Engine: 2,500 r/min (after engine-ECU <M/T> or
warming up) engine-A/T-ECU <A/T>, and repair if
(1) Voltage between terminal 2 and necessary.
earth
OK: 0.5 V or less
(2) Voltage between terminal 4 and (2) NG NG
earth Check the oxygen sensor (front). Replace
OK: 0 V and 0.8 V alternate. (Refer to P.13A-128.)
OK
OK NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK

Check the harness wire between

the oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-87 <M/T> or engine-A/T-ECU B-87 <M/T>, B-86 <A/T>
connector B-86 <A/T>. OK
 Measure the voltage at the
engine-ECU terminal. Check the harness wire between
 Engine: 2,500 r/min (after the oxygen sensor (front) and the
warming up) engine-ECU <M/T> or
 Voltage between terminal 71 and engine-A/T-ECU <A/T>, and repair if
earth necessary.
OK: 0 V and 0.8 V alternate.
OK
NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK

OK
Check the trouble symptoms. Transient malfunction
NG (Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
13A-28 GDI – Troubleshooting

Code No. P0135 Oxygen sensor heater (front) system Probable cause
<sensor 1>
Range of Check  Malfunction of oxygen sensor heater (front)
 The engine coolant temperature is approx. 20C or more.  Open or short circuit in the oxygen sensor heater
 The oxygen sensor heater (front) remains on. (front) circuit or loose connector contact
 The engine speed is 50 r/min or more.  Malfunction of engine-ECU <M/T>
 Battery voltage is 11 – 16 V.  Malfunction of engine-A/T-ECU <A/T>
Set Conditions
 The current, which flows through the oxygen sensor heater (front), is 0.2 A
or less or 3.5 A or more for six seconds.

NG
Measure at oxygen sensor (front) Replace
connector A-55.
 Disconnect the connector and
measure at the harness side.
 Resistance between terminals 1
and 3
OK: 4.5 – 8.0 Ω
OK
NG
Check the following connector: Repair
A-55
OK
NG NG
Measure at oxygen sensor (front) Check the following connector: Repair
connector A-55. B-26
 Disconnect the connector and
measure at the harness side. OK
 Ignition switch: ON Check the harness wires between
 Voltage between terminal 1 and the oxygen sensor (front) and the
earth engine control relay, and repair if
OK: System voltage necessary.
OK
NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-87 <M/T> or engine-A/T-ECU B-87<M/T>, B-84 <A/T>
connector B-84 <A/T>. OK
 Measure the voltage at the
engine-ECU terminal. Check the harness wire between NG
 Ignition switch: ON the oxygen sensor (front) and the
Repair
 Voltage between terminal 86 engine-ECU <M/T> or
<M/T>, 3 <A/T> and earth engine-A/T-ECU <A/T>, and repair if
OK: System voltage necessary.
OK
OK
NG
Check the following connectors: Repair
B-87<M/T>, B-84 <A/T>
Replace the engine-ECU <M/T> or
OK engine-A/T-ECU <A/T>.
NG
Check the harness wires between Repair
the oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T> and between
the oxygen sensor (front) and the
engine control relay.
OK
OK
Check the trouble symptoms. Transient malfunction
(Refer to GROUP 00 – Points to
NG Note for Intermittent Malfunctions.)

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-29
Code No. P0136 Oxygen sensor (rear) system Probable cause
<sensor 2>
Range of Check  Malfunction of oxygen sensor (rear)
 Three minutes have been passed since the engine has been started.  Open or short circuit in the oxygen sensor (rear)
 The engine coolant temperature is approx. 80C or more. circuit or loose connector contact
 Intake air temperature is 20 – 50C  Malfunction of engine-ECU <M/T>
 Engine speed is 1,200 r/min or more  Malfunction of engine-A/T-ECU <A/T>
 Driving on a level surface at constant speed.
Set Conditions
 The oxygen sensor (rear) output voltage is 4.5 V or more when the sensor
output voltage is 0.2 V or less and a voltage of 5 V is applied to the
oxygen sensor (rear) inside the engine-ECU <M/T> or engine-A/T-ECU
<A/T>.
Range of Check
 Two seconds have passed after the engine-ECU <M/T> or engine-A/T-ECU
<A/T> detected an open circuit.
 When the oxygen sensor (front) is in good condition.
Set Conditions
 When the air/fuel ratio is rich, the oxygen sensor (front) output voltage is
0.5 V or more, the oxygen sensor (rear) output voltage is less than 0.1 V,
and the oxygen sensor (rear) output voltage fluctuates within 0.078 V.
13A-30 GDI – Troubleshooting

NG
Check the following connector: Repair
D-22
OK
NG NG
Measure at oxygen sensor (rear) Check the following connectors: Repair
connector D-22. B-87 <M/T>, B-86 <A/T>
 Disconnect the connector and
OK
measure at the harness side. NG
 Resistance between terminal 2 Check the harness wire between Repair
and earth the oxygen sensor (rear) and the
OK: 2 Ω or less engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
OK
Check the trouble symptoms.
NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
(1) NG NG
Measure at oxygen sensor (rear) Check the following connectors: Repair
connector D-22. B-87 <M/T>, B-86 <A/T>
 Measure the voltage at the
oxygen sensor (rear) terminal. OK
 Engine: 2,500 r/min (after
warming up) Check the harness wire between
(1) Voltage between terminal 2 and the oxygen sensor (rear) and the
earth engine-ECU <M/T> or
OK: 0.5 V or less engine-A/T-ECU <A/T>, and repair if
(2) Voltage between terminal 1 and necessary.
earth
OK: 0 V and 0.8 V alternate. (2) NG NG
Check the oxygen sensor (rear). Replace
(Refer to P.13A-128.)
OK
OK NG
Check the following connector: Repair
B-86
OK

Check the harness wire between

the oxygen sensor (rear) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-86 <M/T> or engine-A/T-ECU B-86
connector B-86 <A/T>.
 Measure the voltage at the OK
engine-ECU terminal <M/T> or
Check the harness wire between
engine-A/T-ECU terminal <A/T>.
the oxygen sensor (rear) and the
 Engine: 2,500 r/min (after
engine-ECU <M/T> or
warming up)
engine-A/T-ECU <A/T>, and repair if
 Voltage between terminal 53
necessary.
<M/T>, 73 <A/T> and earth
OK: 0 V and 0.8 V alternate.
OK
NG
Check the following connectors: Repair
B-86 , B-87 <M/T>, B-86 <A/T>
OK

OK
Check the trouble symptoms. Transient malfunction
NG (Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-31
Code No. P0141 Oxygen sensor heater (rear) system Probable cause
<sensor 2>
Range of Check  Malfunction of oxygen sensor heater (rear)
 The engine coolant temperature is approx. 20C or more.  Open or short circuit in the oxygen sensor heater
 The oxygen sensor heater (rear) remains on. (rear) circuit or loose connector contact
 The engine speed is 50 r/min or more.  Malfunction of engine-ECU <M/T>
 Battery voltage is 11 – 16 V.  Malfunction of engine-A/T-ECU <A/T>
Set Conditions
 The current, which flows through the oxygen sensor heater (rear), is 0.2 A
or less or 3.5 A or more for six seconds.

NG
Measure at oxygen sensor (rear) Replace
connector D-22.
 Disconnect the connector and
measure at the harness side.
 Resistance between terminals 3
and 4
OK: 11 – 18 Ω
OK
NG
Check the following connector: Repair
D-22
OK

NG NG
Measure at oxygen sensor (rear) Check the following connector: Repair
connector D-22. B-26
 Disconnect the connector and
measure at the harness side. OK
 Ignition switch: ON Check the harness wires between
 Voltage between terminal 3 and the oxygen sensor (rear) and the
earth engine control relay, and repair if
OK: System voltage necessary.
OK
NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-87 <M/T> or engine-A/T-ECU B-87 <M/T>, B-84 <A/T>
connector B-84 <A/T>.
 Measure the voltage at the OK
engine-ECU terminal <M/T> or
Check the harness wire between NG
engine-A/T-ECU terminal <A/T>. Repair
 Ignition switch: ON the oxygen sensor (rear) and the
 Voltage between terminal 90 engine-ECU <M/T> or
<M/T>, 26 <A/T> and earth engine-A/T-ECU <A/T>, and repair if
OK: System voltage necessary.
OK OK
NG
Check the following connectors: Repair
B-87 <M/T>, B-84 <A/T> Replace the engine-ECU<M/T> or
OK engine-A/T-ECU <A/T>.
NG
Check the harness wires between Repair
the oxygen sensor (rear) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T> and between
the oxygen sensor (rear) and the
engine control relay.
OK
OK
Check the trouble symptoms. Transient malfunction
(Refer to GROUP 00 – Points to
NG Note for Intermittent Malfunctions.)

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-32 GDI – Troubleshooting

Code No. P0170 Abnormal fuel system Probable cause

Range of Check  Malfunction of fuel supply system
 Engine: Being learning the air-fuel ratio  Malfunction of oxygen sensor (front)
Set Conditions  Malfunction of intake air temperature sensor
 Ten seconds or more have been passed while the fuel injection amount  Malfunction of barometric pressure sensor
compensation value is too low.  Malfunction of air flow sensor
or  Malfunction of engine-ECU <M/T>
 Ten seconds or more have been passed while the fuel injection amount  Malfunction of engine-A/T-ECU <A/T>
compensation value is too high.

YES
MUT-II Self-Diag Code Refer to P.13A-12, INSPECTION
Is any diagnosis code other than CHART FOR DIAGNOSIS CODES.
No. P0170 output?
NO
NG
Check the air intake from the intake Repair
hose and intake manifold.
OK
NG
Check the exhaust gas leaks from Repair
the exhaust manifold.
OK
NG
Check the throttle body (around the Cleaning
throttle valve), and clean if
necessary. (Refer to P.13A-96*.)
OK

NG NG
MUT-II Data list Check fuel leakage around the fuel Repair
74 Fuel pressure sensor pump (high-pressure) line.
(Refer to 13A-99, DATA LIST
REFERENCE TABLE.) OK
OK Replace the fuel pump
(high-pressure).

NG
MUT-II Data list Refer to the Inspection procedure
11 Oxygen sensor (front) for the sensor, which is indicated by
12 Air flow sensor the abnormal service data.
13 Intake air temperature sensor (Refer to P.13A-12, INSPECTION
21 Engine coolant temperature CHART FOR DIAGNOSIS CODES.)
sensor
25 Barometric pressure sensor
(Refer to 13A-99, DATA LIST
REFERENCE TABLE.)
Reference
If all the service data is normal, go
to “OK.”
If any abnormal service is found, go
to “NG.”
OK

NG
Check the oxygen sensor (front) Replace
(Refer to P.13A-128.)
OK
NG
Check the purge control solenoid Replace
valve (Refer to GROUP 17 –
Emission Control).
OK

To the next page

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 GDI – Troubleshooting 13A-33

From the previous page

OK
NG
Check the EGR valve (Refer to Replace
GROUP 17 – Emission Control.)
OK

NG
Check the fuel pressure between Repair
the fuel pump (low-pressure) and
the fuel pump (high-pressure) (Refer
to P.13A-122.)
OK

NG
Check the fuel lines for fuel leaks. Repair
OK
NG
Check the injectors for clogging or Repair
leaks.
OK
OK
Check the trouble symptoms. Transient malfunction
(Refer to GROUP 00 – Points to
NG
Note for Intermittent Malfunctions.)
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
13A-34 GDI – Troubleshooting

Code No. P0190 Abnormal fuel pressure Probable cause

Range of Check  Malfunction of of fuel pressure sensor
 Ignition switch: ON  Open or short circuit in the fuel pressure sensor
Set Conditions circuit or loose connector contact
 The sensor output voltage is 4.8 V or more, or 0.2 V or less for four  Malfunction of engine-ECU <M/T>
seconds.  Malfunction of engine-A/T-ECU <A/T>
Range of Check  Malfunction of high-pressure fuel pump
 The following conditions are detected temporarily after the engine has been  Clogging of high-pressure fuel lines
started.
(1) Engine speed: 1,000 r/min or more
(2) Fuel pressure: 2 MPa or more
 Engine running
Set Conditions
 The fuel pressure is 6.9 MPa or more, or 2 MPa or less for four seconds.
This diagnosis code will also be output when air is trapped into the  Air trapped due to poor fuel level
high-pressure fuel lines (such as poor fuel level). In that case, the air can be
evacuated by operating the engine for at least 15 seconds at 2,000 r/min. After
the repair, use the MUT-II to erase the diagnosis code.

OK
MUT-II Data list Transient malfunction
74 Fuel pressure sensor (Refer to (Refer to GROUP 00 – Points to
13A-99, DATA LIST Note for Intermittent Malfunctions.)
REFERENCE TABLE.)
NG
NG
Check the following connector: Repair
A-83
OK
(1) NG OK
Measure at fuel pressure sensor Measure at engine-ECU connector Check the following connector:
connector A-83. B-86 <M/T> or engine-A/T-ECU B-86
 Disconnect the connector, and connector B-86 <A/T>. OK NG
measure at the harness side.  Measure the voltage at the Repair
(1) Voltage between terminal 1 and engine-ECU terminal <M/T> or
earth (Ignition switch: ON) engine-A/T-ECU terminal <A/T>. Check the harness wire between
OK: 4.8 – 5.2 V  Ignition switch: ON the fuel pressure sensor connector
(2) Resistance between terminal 3  Voltage between terminal and the engine-ECU <M/T> or
and earth 41<M/T> or 87 <A/T> and earth engine-A/T-ECU <A/T>, and repair if
OK: 2 Ω or less OK: 4.8 – 5.2 V necessary.
NG
NG
Check the following connector: Repair
B-86
OK
NG
Check the harness wire between the Repair
fuel pressure sensor connector and
the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(2) NG NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK OK
NG
To the next page Check the harness wire between the Repair
fuel pressure sensor connector and
the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-35
From the previous page
OK
(1) NG NG
Measure at fuel pressure sensor Check the following connector: Repair
connector A-83. B-86
 Use test harness (MB991658) to OK
connect the connector, and
measure at the pick-up harness. Check the harness wire between
 Engine: Idling the fuel pressure sensor connector
(1) Voltage between terminal 1 and and the engine-ECU <M/T> or
earth engine-A/T-ECU <A/T>, and repair if
OK: 4.8 – 5.2 V necessary.
(2) Voltage between terminal 2 and
earth (2) NG
OK: 0.3 – 4.7 V Replace the fuel pressure sensor.
(3) Voltage between terminal 3 and
earth
OK: 0.5 V or less Check the trouble symptoms.
NG
NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK
Check the harness wire between
the fuel pressure sensor connector
and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.
(3) NG NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK
OK
Check the harness wire between
the fuel pressure sensor connector
and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-87 <M/T> or engine-A/T-ECU B-87 <M/T> , B-86 <A/T>
connector B-86 <A/T>. OK
 Measure the voltage at the
engine-ECU terminal <M/T> or Check the harness wire between
engine-A/T-ECU terminal <A/T>. the fuel pressure sensor connector
 Engine: Idling and the engine-ECU <M/T> or
 Voltage between terminal 92 engine-A/T-ECU <A/T>, and repair if
<M/T>, 93 <A/T> and earth necessary.
OK: 0.3 – 4.7 V
OK NG
Check the following connectors: Repair
B-87 <M/T> , B-86 <A/T>
OK
Check the trouble symptoms.
OK

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.

Code No. P0201 No. 1 injector system Probable cause

Range of Check  Malfunction of No. 1 injector
 The engine speed is 4,000 r/min or less.  Open or short circuit in the No. 1 injector circuit
 The battery voltage is 10 V or more. or loose connector contact
 The fuel cut operation or the injector operation (by carrying out the Actuator  Malfunction of engine-ECU <M/T>
Test) is not in progress.  Malfunction of engine-A/T-ECU <A/T>
Set Conditions
 The injector driver is not transmitting a injector open circuit check signal
for four seconds.
13A-36 GDI – Troubleshooting

OK OK
MUT-II Actuator Test Check the trouble symptoms. Transient malfunction
01 No. 1 injector (Refer to GROUP 00 – Points to
NG
OK: The idling condition should Note for Intermittent Malfunctions.)
change. Replace the injector driver.
NG
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Check the following connector: Repair
A-82
OK
NG NG
Measure at intermediate connector Check the following connector: Repair
A-82 A-48
 Disconnect the connector and OK
measure at the harness side. NG
 Resistance between terminals 1 Check the harness wire between Repair
and 2 No. 1 injector and the intermediate
OK: 0.9 – 1.1 Ω connector.
OK OK
Replace the No. 1 injector.
NG
Check the following connector: Repair
A-52
OK
NG
Check the harness wire between Repair
the injector driver and the
intermediate connector.
OK
NG
Check the following connector: Repair
B-84
OK
NG
Check the harness wire between the Repair
injector driver and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG NG
Use an analyzer to measure the Check the following connector: Repair
signal waveform at engine-ECU A-48
connectors B-84 and B-87 <M/T> or
OK
engine-A/T-ECU connector B-84 and
B-85 <A/T>. NG
Check the harness wire between Repair
 Engine: Idling the No. 1 injector and the
 Voltage between terminal 1 and intermediate connector.
earth
OK: A normal waveform should OK
be displayed as described
on P.13A-118 (INSPEC- Replace the engine-ECU <M/T> or
TION PROCEDURE US- engine-A/T-ECU <A/T>.
ING AN ANALYZER).
OK

NG
Check the following connector: Repair
A-48
OK
NG
Check the harness wire between Repair
No. 1 injector and the intermediate
connector.
OK
Replace the No. 1 injector.

NG
Check the trouble symptoms. Replace the injector driver.
 GDI – Troubleshooting 13A-37
Code No. P0202 No. 2 injector system Probable cause
Range of Check  Malfunction of No. 2 injector
 The engine speed is 4,000 r/min or less.  Open or short circuit in the No. 2 injector circuit
 The battery voltage is 10 V or more. or loose connector contact
 The fuel cut operation or the injector operation (by carrying out the Actuator  Malfunction of engine-ECU <M/T>
Test) is not in progress.  Malfunction of engine-A/T-ECU <A/T>
Set Conditions
 The injector driver is not transmitting a injector open circuit check signal
for four seconds.

OK OK
MUT-II Actuator Test Check the trouble symptoms. Transient malfunction
02 No. 2 injector (Refer to GROUP 00 – Points to
NG
OK: The idling condition should Note for Intermittent Malfunctions.)
change. Replace the injector driver.
NG
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
NG engine-A/T-ECU <A/T>.
Check the following connector: Repair
A-82
OK
NG NG
Measure at intermediate connector Check the following connector: Repair
A-82 A-49
 Disconnect the connector and OK
measure at the harness side. NG
 Resistance between terminals 3 Check the harness wire between Repair
and 4 No. 2 injector and the intermediate
OK: 0.9 – 1.1 Ω connector.
OK OK
Replace the No. 2 injector.
NG
Check the following connector: Repair
A-52
OK
NG
Check the harness wire between Repair
the injector driver and the
intermediate connector.
OK
NG
Check the following connector: Repair
B-84
OK
NG
Check the harness wire between the Repair
injector driver and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG NG
Use an analyzer to measure the Check the following connector: Repair
signal waveform at engine-ECU A-49
connectors B-84 and B-87 <M/T> or OK
engine-A/T-ECU connectors B-84 NG
and B-85 <A/T>. Check the harness wire between Repair
 Engine: Idling the No. 2 injector and the
 Voltage between terminal 9 and intermediate connector.
earth
OK: A normal waveform should OK
be displayed as described
on P.13A-118 (INSPEC- Replace the engine-ECU <M/T> or
TION PROCEDURE US- engine-A/T-ECU <A/T>.
ING AN ANALYZER).
OK

NG
Check the following connector: Repair
A-49
OK

To the next page

13A-38 GDI – Troubleshooting

From the previous page

OK
NG
Check the harness wire between Repair
No. 2 injector and the intermediate
connector.
OK
Replace the No. 2 injector.

NG
Check the trouble symptoms. Replace the injector driver.

Code No. P0203 No. 3 injector system Probable cause

Range of Check  Malfunction of No. 3 injector
 The engine speed is 4,000 r/min or less.  Open or short circuit in the No. 3 injector circuit
 The battery voltage is 10 V or more. or loose connector contact
 The fuel cut operation or the injector operation (by carrying out the Actuator  Malfunction of engine-ECU <M/T>
Test) is not in progress.  Malfunction of engine-A/T-ECU <A/T>
Set Conditions
 The injector driver is not transmitting a injector open circuit check signal
for four seconds.

OK OK
MUT-II Actuator Test Check the trouble symptoms. Transient malfunction
03 No. 3 injector (Refer to GROUP 00 – Points to
NG
OK: The idling condition should Note for Intermittent Malfunctions.)
change. Replace the injector driver.
NG
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Check the following connector: Repair
A-82
OK
NG NG
Measure at intermediate connector Check the following connector: Repair
A-82. A-54
 Disconnect the connector and OK
measure at the harness side. NG
 Resistance between terminals 5 Check the harness wire between Repair
and 6 No. 3 injector and the intermediate
OK: 0.9 – 1.1 Ω connector.
OK OK
Replace the No. 3 injector.
NG
Check the following connector: Repair
A-54
OK
NG
Check the harness wire between Repair
the injector driver and the
intermediate connector.
OK
NG
Check the following connector: Repair
B-84
OK
NG
Check the harness wire between the Repair
injector driver and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK

To the next page

 GDI – Troubleshooting 13A-39
From the previous page
OK
NG NG
Use an analyzer to measure the Check the following connector: Repair
signal waveform at engine-ECU A-54
connectors B-84 and B-87 <M/T> or
OK
engine-A/T-ECU connectors B-84
and B-85 <A/T>. NG
Check the harness wire between Repair
 Engine: Idling the No. 3 injector and the
 Voltage between terminal 24 and intermediate connector.
earth
OK: A normal waveform should OK
be displayed as described
on P.13A-118 (INSPEC- Replace the engine-ECU <M/T> or
TION PROCEDURE US- engine-A/T-ECU <A/T>.
ING AN ANALYZER).
OK

NG
Check the following connector: Repair
A-54
OK
NG
Check the harness wire between Repair
No. 3 injector and the intermediate
connector.
OK
Replace the No. 3 injector.

NG
Check the trouble symptoms. Replace the injector driver.

Code No. P0204 No. 4 injector system Probable cause

Range of Check  Malfunction of No. 4 injector
 The engine speed is 4,000 r/min or less.  Open or short circuit in the No. 4 injector circuit
 The battery voltage is 10 V or more. or loose connector contact
 The fuel cut operation or the injector operation (by carrying out the Actuator  Malfunction of engine-ECU <M/T>
Test) is not in progress.  Malfunction of engine-A/T-ECU <A/T>
Set Conditions
 The injector driver is not transmitting a injector open circuit check signal
for four seconds.
13A-40 GDI – Troubleshooting

OK OK
MUT-II Actuator Test Check the trouble symptoms. Transient malfunction
04 No. 4 injector (Refer to GROUP 00 – Points to
NG
OK: The idling condition should Note for Intermittent Malfunctions.)
change. Replace the injector driver.
NG
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Check the following connector: Repair
A-82
OK
NG NG
Measure at intermediate connector Check the following connector: Repair
A-82. A-60
 Disconnect the connector and OK
measure at the harness side. NG
 Resistance between terminals 7 Check the harness wire between Repair
and 8 No. 4 injector and the intermediate
OK: 0.9 – 1.1 Ω connector.
OK OK
Replace the No. 4 injector.
NG
Check the following connector: Repair
A-60
OK
NG
Check the harness wire between Repair
the injector driver and the
intermediate connector.
OK
NG
Check the following connector: Repair
B-84
OK
NG
Check the harness wire between the Repair
injector driver and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK

Use an analyzer to measure the NG NG

Check the following connector: Repair
signal waveform at engine-ECU A-60
connectors B-84 and B-87 <M/T> or
OK
engine-A/T-ECU connectors B-85
and B-84 <A/T>. NG
Check the harness wire between Repair
 Engine: Idling the No. 4 injector and the
 Voltage between terminal 2 and intermediate connector.
earth
OK: A normal waveform should OK
be displayed as described
on P.13A-118 (INSPEC- Replace the engine-ECU <M/T> or
TION PROCEDURE US- engine-A/T-ECU <A/T>.
ING AN ANALYZER).
OK

NG
Check the following connector: Repair
A-60
OK
NG
Check the harness wire between Repair
No. 4 injector and the intermediate
connector.
OK
Replace the No. 4 injector.

NG
Check the trouble symptoms. Replace the injector driver.
 GDI – Troubleshooting 13A-41
Code No. P0220 Accelerator pedal position sensor (1st Probable cause
channel) system
Range of Check  Malfunction of accelerator pedal position sensor
 Accelerator pedal position sensor (2nd channel) is normal. (1st channel)
 Communication between the engine-ECU <M/T> or engine-A/T-ECU <A/T>  Open or short circuit in the accelerator pedal
and the throttle valve controller is normal. position sensor (1st channel) circuit or loose
Set Conditions connector contact
 The output voltage of accelerator pedal position sensor (1st channel) is 0.2  Accelerator pedal position switch seized ON
V or less for one second.  Malfunction of throttle valve controller
or  Malfunction of engine-ECU <M/T>
 The output voltage of accelerator pedal position sensor (2nd channel) is 2.5  Malfunction of engine-A/T-ECU <A/T>
V or less, and that of accelerator pedal position sensor (1st channel) is 4.5
V or more for one second
or
 The difference between accelerator pedal position sensor (1st channel) and
accelerator pedal position sensor (2nd channel) output voltages is 1.0 V or
more (i.e. the throttle opening angle changes slightly).
or
 The output voltage of accelerator pedal position sensor (1st channel) is
1.875 V or more for one second when the accelerator pedal position switch
is turned on.
13A-42 GDI – Troubleshooting

MUT-II Data list NG Check the accelerator pedal position

26 Accelerator pedal position switch switch system. (Refer to P.13A-94,
(Refer to P.13A-99, DATA LIST Inspection Procedure 29.)
REFERENCE TABLE.)
OK OK
MUT-II Data list Transient malfunction
78 Accelerator pedal position sensor (Refer to GROUP 00 – Points to
(1st channel) (Refer to P.13A-99, Note for Intermittent Malfunctions.)
DATA LIST REFERENCE
TABLE.)
NG
NG
Check Accelerator pedal position Replace
sensor (1st channel) (Refer to
P.13A-127.)
OK
NG
Check the following connector: Repair
B-94
OK
(1) NG NG
Measure at accelerator pedal Check the following connectors: Repair
position sensor connector B-94. B-86 <M/T>, B–85<A/T>
 Disconnect the connector and OK
measure at the harness side.
(1) Resistance between terminal 1 Check the harness wire between NG
Repair
and earth accelerator pedal position sensor
OK: 2 Ω or less (1st channel) and the engine-ECU
(2) Voltage between terminal 2 and <M/T> or engine-A/T-ECU <A/T>.
earth OK
(Ignition switch: ON) NG
OK: 4.8 – 5.2 V Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(2) NG OK
Measure at engine-ECU connector Check the following connectors:
B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B–85<A/T>
connector B-85 <A/T>.
OK NG
 Measure the voltage at the Repair
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>. Check the harness wire between
 Ignition switch: ON accelerator pedal position sensor
 Voltage between terminal 42 (1st channel) and the engine-ECU
<M/T>, 46 <A/T> and earth <M/T> or engine-A/T-ECU <A/T>,
OK: 4.8 – 5.2 V and repair if necessary.
NG
OK NG
Check the following connectors: Repair
To the next page B-86 <M/T>, B–85<A/T>
OK
NG
Check the harness wire between Repair
accelerator pedal position sensor
(1st channel) and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-43
From the previous page
OK
(1), (2) NG NG
Measure at accelerator pedal Check the following connectors: Repair
position sensor connector B-94. B-86 <M/T>, B-85 <A/T>
 Connect connector terminals No. OK
1, No. 2 and No. 3 only by
using test harness (MB991658), Check the harness wire between
and measure at the pick-up accelerator pedal position sensor
harness. (1st channel) and the engine-ECU
 Ignition switch: ON <M/T> or engine-A/T-ECU <A/T>,
(1) Voltage between terminal 1 and and repair if necessary.
earth
OK: 0.5 V or less (3) NG
Adjust the accelerator pedal position
(2) Voltage between terminal 2 and
sensor. (Refer to P.13A-121.)
earth
OK: 4.8 – 5.2 V
(3) Voltage between terminal 3 and NG
earth Check the following connectors: Repair
OK: Accelerator pedal fully re- B-87<M/T>, B-86 <A/T>
leased: 0.985 – 1.085 V OK
Accelerator pedal fully de-
Check the harness wire between
pressed: 4.0 V or higher
OK accelerator pedal position sensor
(1st channel) and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-87 <M/T> or engine-A/T-ECU B-87<M/T>, B-86 <A/T>
connector B-86 <A/T>.
OK
 Measure the voltage at the
engine-ECU terminal <M/T> or Check the harness wire between
engine-A/T-ECU terminal <A/T>. accelerator pedal position sensor
 Ignition switch: ON (1st channel) and the engine-ECU
 Voltage between terminal 94 <M/T> or engine-A/T-ECU <A/T>,
<M/T>, 95 <A/T> and earth and repair if necessary.
OK: Accelerator pedal fully re-
leased: 0.985 – 1.085 V OK NG
Accelerator pedal fully de- Check the following connectors: Repair
pressed: 4.0 V or higher B-87<M/T>, B-86 <A/T>
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-44 GDI – Troubleshooting

Code No. 0225 Throttle position sensor (2nd channel) Probable cause
system
The throttle valve controller judges a malfunction, and then transmit the result  Malfunction of throttle position sensor (2nd
to the engine-ECU <M/T> or engine-A/T-ECU <A/T>. channel)
Range of Check  Open or short circuit in the throttle position
 Ignition switch: ON sensor (2nd channel) circuit or loose connector
 The throttle position sensor (1st channel) is normal. contact
Set Conditions  Malfunction of the throttle valve controller
 The sensor output voltage is 0.2 V or less for four seconds.  Malfunction of the engine-ECU <M/T>
or  Malfunction of the engine-A/T-ECU <A/T>
 The sensor output voltage is 4.85 V or more for four seconds, and the
output voltage of the throttle position sensor (1st channel) is 1.2 V or more.
or
 The throttle position sensor (1st channel) and throttle position sensor (2nd
channel) combination output voltage is outside 4 – 6 V.

OK
MUT-II Data list Intermittent malfunction
14 Throttle position sensor (2nd (Refer to GROUP 00 – Points to
channel) Note for Intermittent Malfunctions.)
OK: Refer to P.13A-99, DATA
LIST REFERENCE TABLE.
NG
NG
Check throttle position sensor (2nd Replace
channel). (Refer to P.13A-106*.)
OK
NG
Check the following connector: Repair
A-66
OK
(1) NG OK
Measure at throttle position sensor Measure at throttle valve controller Check the following connector:
connector A-66. connector B-15. B-15
 Disconnect the connector and  Measure the voltage at the
OK NG
measure at the harness side. throttle valve controller connector Repair
(1) The voltage between terminal 1 terminals.
and earth  Ignition switch: ON
(Ignition switch: ON)  The voltage between terminal 6 Check the harness wire between
OK: 4.8 – 5.2 V and earth the throttle position sensor and the
(2) Resistance between terminal 3 OK: 4.8 – 5.2 V throttle valve controller, and repair if
and earth necessary.
NG
OK: 2 Ω or less
NG
Check the following connector: Repair
B-15
OK
NG
Check the harness wire between Repair
the throttle position sensor and the
throttle valve controller.
OK
NG
Check the trouble symptoms. Replace the throttle valve controller.

(2) NG NG
Check the following connector: Repair
B-15
OK OK
NG
Check the harness wire between Repair
To the next page
the throttle position sensor and the
throttle valve controller.
OK
NG
Check the trouble symptoms. Replace the throttle valve controller.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 GDI – Troubleshooting 13A-45
From the previous page
OK
(1), (2) NG NG
Measure at throttle position sensor Check the following connector: Repair
connector A-66. B-15
 Use test harness (MB991536) to OK
connect the connector, and
measure at the pick-up harness. Check the harness wire between
 Ignition switch: ON throttle position sensor (2nd channel)
(1) The voltage between terminal 1 and the throttle valve controller.
and earth
OK: 4.8 – 5.2 V (3) NG
(2) The voltage between terminal 3 Adjust the throttle position sensor.
and earth (Refer to P.13A-96*.)
OK: 0.5 V or less
(3) The voltage between terminal 4 NG
and earth Check the following connectors: Repair
OK: Accelerator pedal fully re- B-87 <M/T>, B-86 <A/T>
leased: 4.0 V or more
Accelerator pedal fully de- OK
pressed: 0.4 – 0.6 V Check the harness wire between
OK throttle position sensor (2nd
channel) and the engine-ECU <M/T>
or engine-A/T-ECU <A/T>, and
repair if necessary.
NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-87 <M/T> or engine-A/T-ECU B-87 <M/T>, B-86 <A/T>
connector B-86 <A/T>. OK
 Measure the voltage at the
engine-ECU terminal <M/T> or Check the harness wire between
engine-A/T-ECU terminal <A/T>. throttle position sensor (2nd
 Ignition switch: ON channel) and the engine-ECU <M/T>
 The voltage between terminal 78 or engine-A/T-ECU <A/T>, and
and earth repair if necessary.
OK: Accelerator pedal fully re-
leased: 4.0 V or more OK NG
Accelerator pedal fully de- Check the following connectors: Repair
pressed: 0.4 – 0.6 V B-87 <M/T>, B-86 <A/T>
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

Code No. P0300 Ignition coil (power transistor) system Probable cause
Range of Check  Malfunction of the ignition coil
 Engine speed is approx. 50 – 4,000 r/min.  Malfunction of the ignition failure sensor
 Engine is not cranking.  Malfunction of spark plug
Set Conditions  Open or short circuit in the primary ignition
 The ignition failure sensor does not send a signal about a certain cylinder circuit or loose connector contact
for four seconds.  Malfunction of engine-ECU <M/T>
 Malfunction of engine-A/T-ECU <A/T>
13A-46 GDI – Troubleshooting

(1) NG
MUT-II Actuator Test Check the following connectors: Repair
01 No. 1 injector Ignition coil connectors, which
02 No. 2 injector correspond to defective cylinders
03 No. 3 injector (A-85, A-86, A-89, A-91).
04 No. 4 injector
OK: The idling condition should OK
change. NG
Check the spark plug and the Replace
Reference
ignition coil for a defective cylinder.
When the cylinder (defective
cylinder) where idling condition does (Refer to GROUP 16 – Ignition
not change is detected after System.)
suspending the injector, go to (1) OK
and inspect the spark plug, the NG
ignition coil, the connector, and the Check the following connector: Repair
harness of the defective cylinder. B-84
(When more than one cylinder are
OK
detected, inspect all of them.) NG
When all the cylinders are OK, go Check the harness wire between Repair
to (2). the engine-ECU <M/T> or
(2) engine-A/T-ECU <A/T> and the
ignition coil connector for a
defective cylinder.
OK

Use an analyzer to measure the signal waveform at engine-ECU connector B-84

<M/T> or engine-A/T-ECU connector B-84 <A/T>.
 Engine: Idling
 The voltage between the ignition coil primary signal terminal for a defective cylinder
and earth
OK: A normal waveform should be displayed as described on P.13A-118 (Inspec-
tion Procedure Using an Analyzer).
OK NG

Repair the ignition coil assembly for Replace the engine-ECU <M/T> or
a defective cylinder and the spark engine-A/T-ECU <A/T>.
plug.
(1)
Use an analyzer to measure the
signal waveform at the ignition
failure sensor connector A-96.
 Use test harness (MB991536) to
connect the connector, and
measure at the pick-up harness.
 Engine: Idling (3) NG
 The voltage between terminal 2 Check the following connector: Repair
and earth A-86 <M/T>, A-85 <A/T>
OK: A normal waveform should OK
be displayed as described NG
on P.13A-118 (INSPEC- Check the harness wires between Repair
TION PROCEDURE US- the ignition failure sensor and the
ING AN ANALYZER). engine-ECU <M/T> or
Reference engine-A/T-ECU <A/T>, and between
When a normal waveform is the ignition failure sensor and earth.
displayed, compare it with that of
the ignition coil primary signal at the OK
engine-ECU terminal <M/T> or
engine-A/T-ECU <A/T> to determine Repair the ignition failure sensor.
the cylinder (defective cylinder) with
an abnormal waveform. NG
→When one or more cylinders are Check the trouble symptoms. Replace the engine-ECU <M/T> or
abnormal, go to (1) engine-A/T-ECU <A/T>.
→When all of the cylinders are
abnormal, go to (3) (4) OK
→When a normal waveform is Check the trouble symptoms. Intermittent malfunction
displayed, go to (4). (Refer to GROUP 00 – Points to
NG
Note for Intermittent Malfunctions.)
Check the spark plug and the
ignition coil for a defective cylinder.
(Refer to GROUP 16 – Ignition
System.)
 GDI – Troubleshooting 13A-47
Code No. P0301 No. 1 cylinder misfire detected Probable cause
Code No. P0302 No. 2 cylinder misfire detected
Code No. P0303 No. 3 cylinder misfire detected
Code No. P0304 No. 4 cylinder misfire detected
Range of Check  Malfunction of the ignition system
 The engine speed is 500 – 4,500 r/min.  Abnormal compression
 While the engine is running except deceleration and sudden acceleration.  Malfunction of injector
Set Conditions  Malfunction of engine-ECU <M/T>
 The number of misfires exceeds a predetermined number per 200 engine  Malfunction of engine-A/T-ECU <A/T>
revolutions (Misfire has occurred in only one cylinder).
or
 The number of misfires exceeds a predetermined number per 100 engine
revolutions (Misfire has occurred in only one cylinder).

NG
Check the following connectors: Repair
A-85, A-86, A-89, A-91
OK
(1) NG NG
Measure at ignition coil connectors Check the following connectors: Repair
A-85, A-86, A-89, A-91. A-96, A-18
 Disconnect the connector and
OK
measure at the harness side.
(1) The voltage between terminal 1
Check the ignition failure sensor NG
and earth Replace
(Refer to GROUP 16 – Ignition
(Ignition switch: ON)
System.)
OK: System voltage
(2) The voltage between terminal 3 OK
and earth
(Engine: Cranking) Check the harness wire between the
OK: 0.5 – 4.0 V ignition coil and the ignition failure
(3) The resistance between terminal sensor, and between the ignition
2 and earth switch and the ignition failure sensor.
OK: 2 Ω or less
(2) NG Check the following connector: NG
B-84 Repair

OK

Check the harness wire between NG

the ignition coil and the engine-ECU Repair
(3) NG <M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
OK
engine-A/T-ECU <A/T>.

Check the ignition coil (Refer to Check the harness wire between
GROUP 16 – Ignition System.) the ignition coil and the earth, and
repair if necessary.

NG
Check the spark plugs. Replace
OK
Check the compression pressure.
NG
(Refer to GROUP 11A – On-vehicle Repair
Service.)
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-48 GDI – Troubleshooting

Code No. P0325 Detonation sensor system Probable cause

Range of Check  Malfunction of the detonation sensor
 Engine: Two seconds after the engine has been started  Open or short circuit in the detonation sensor
Set Conditions circuit or loose connector contact
 Changes in sensor output voltage (detonation sensor peak voltage per 1/3  Malfunction of engine-ECU <M/T>
crankshaft rotation) in 200 consecutive cycles are 0.08 V or less.  Malfunction of engine-A/T-ECU <A/T>

NG
Check the following connector: A-50 Repair
OK
NG
Measure at the detonation sensor connector A-50. Check the harness wire between the detonation sensor and
 Disconnect the connector and measure at the harness earth, and repair if necessary.
side.
 The resistance between terminal 2 and earth
OK: 2 Ω or less
OK
NG
Check the following connectors: B-87 <M/T>, B-86 <A/T> Repair
OK
NG
Check the harness wire between the detonation sensor and Repair
the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
OK
OK
Check the trouble symptoms. Intermittent malfunction
(Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions.)
Replace the detonation sensor.

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

Code No. P0335 Crank angle sensor system Probable cause

Range of Check  Malfunction of the crank angle sensor.
 Engine is cranking  Open or short circuit in the crank angle sensor
Set Conditions circuit or loose connector contact.
 Sensor output voltage does not change for 4 seconds (no pulse signal  Malfunction of engine-ECU <M/T>
input).  Malfunction of engine-A/T-ECU <A/T>
 GDI – Troubleshooting 13A-49
OK
MUT-II Data list Intermittent malfunction
22 Crank angle sensor (Refer to GROUP 00 – Points to
OK: Refer to P.13A-99, DATA Note for Intermittent Malfunctions.)
LIST REFERENCE TABLE.
NG
NG
Check the following connector: Repair
A-94
OK
(1) NG
Measure at the crank angle sensor Check the harness between the
connector A-94. crank angle sensor and earth, and
 Disconnect the connector and repair if necessary.
measure at the harness side.
(1) The resistance between terminal (2) NG OK
1 and earth Measure at engine-ECU connector Check the following connectors:
OK: 2 Ω or less B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
(2) The voltage between terminal 3 connector B-85 <A/T>. NG
OK
and earth  Measure the voltage at the Repair
(Ignition switch: ON) engine-ECU terminal <M/T> or
OK: 4.8 – 5.2 V engine-A/T-ECU terminal <A/T>.
Check the harness wire between
(3) The voltage between terminal 2  Disconnect the connector A-94 the crank angle sensor and the
and earth  Ignition switch: ON engine-ECU <M/T> or
(Ignition switch: ON)  The voltage between terminal 43 engine-A/T-ECU <A/T>, and repair if
OK: System voltage <M/T>, 45 <A/T> and earth.
necessary.
OK: 4.8 – 5.2 V
NG
NG
Check the following connectors: Repair
B-86 <M/T>, B-85 <A/T>
OK
NG
Check the harness wire between Repair
the crank angle sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(3) NG NG
Check the following connector: Repair
B-26
OK OK

Check the harness wire between

the crank angle sensor and the
engine control relay, and repair if
necessary.
NG NG
Use an analyzer to measure the Check the crank angle sensor vane Replace
output waveform at the crank angle
OK
sensor connector A-94.
 Use the test harness
Replace the crank angle sensor.
(MB991658) to connect the
connector, and measure at the
pick-up harness side.
 Engine: Idling Check the trouble symptoms.
 The voltage between terminal 3 NG
and earth NG
OK: A normal waveform should Check the following connectors: Repair
be displayed as described B-86 <M/T>, B-85 <A/T>
on P.13A-118 (Inspection
Procedure Using an Ana- OK
lyzer). Its maximum value
should be 4.8 V or more, Check the harness wires between
and its minimum value the crank angle sensor and the
should be 0.6 V or less engine-ECU <M/T> or
with no noise in waveform. engine-A/T-ECU <A/T>, crank angle
sensor and the engine control relay,
and the crank angle sensor and
OK earth. Then, repair if necessary.

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-50 GDI – Troubleshooting

Code No. P0340 Camshaft position sensor system Probable cause

Range of Check  Malfunction of the camshaft position sensor
 After the engine was started  Open or short circuit in the camshaft position
Set Conditions sensor circuit or loose connector contact.
 The sensor output voltage does not change for 4 seconds (no pulse signal  Malfunction of engine-ECU <M/T>
input).  Malfunction of engine-A/T-ECU <A/T>
 GDI – Troubleshooting 13A-51
NG
Check the following connector: Repair
A-81
OK
(1) NG NG
Measure at camshaft position Check the following connector: Repair
sensor connector A-81. B-26
 Disconnect the connector and OK
measure at the harness side.
(1) The voltage between terminal 3 Check the harness wire between
and earth the camshaft position sensor
(Ignition switch: ON) connector and the engine control
OK: System voltage relay, and repair if necessary.
(2) The voltage between terminal 2
and earth (2) NG
Measure at engine-ECU connector OK
(Ignition switch: ON) Check the following connectors:
OK: 4.8 – 5.2 V B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
(3) The resistance between terminal connector B-85 <A/T>. NG
OK
1 and earth  Measure the voltage at the Repair
OK: 2 Ω or less engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>. Check the harness wire between
 Disconnect connector A-81. the camshaft position sensor
 Ignition switch: ON connector and the engine-ECU
 The voltage between terminal 50 <M/T> or engine-A/T-ECU <A/T>,
<M/T>, 56<A/T> and earth and repair if necessary.
OK: 4.8 – 5.2 V
NG
NG
Check the following connectors: Repair
B-86 <M/T>, B-85 <A/T>
OK
NG
Check the harness wire between Repair
the intermediate connector and the
(3) NG engine-ECU <M/T> or
OK engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

Check the harness wire between the

camshaft position sensor connector
and earth, and repair if necessary.

NG NG
Use an analyzer to measure the Check the camshaft position sensing Replace
output waveform at camshaft cylinder.
position sensor connector A-81.
 Use test harness (MB991709) to OK
connect the connector, and Replace the camshaft position
measure at the pick-up harness. sensor.
 Engine: Idling
 The voltage between terminal 2
and earth
OK: A normal waveform should Check the trouble symptoms.
be displayed as described NG
on P.13A-118 (Inspection NG
Procedure Using an Ana- Check the following connectors: Repair
lyzer), its maximum value B-86 <M/T>, B-85 <A/T>, B-26
should be 4.8 V or more, OK
and its minimum value
should be 0.6 V or less Check the harness wires between the camshaft position sensor connector and the
with no noise in waveform. engine-ECU <M/T> or engine-A/T-ECU <A/T>, the camshaft position sensor connector
and the engine control relay, and the camshaft position sensor connector and earth.
OK Then, repair if necessary.

OK
Check the trouble symptoms. Intermittent malfunction
NG (Refer to GROUP 00 – Points to Note for Intermittent Malfunctions.)

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-52 GDI – Troubleshooting

Code No. P0403 EGR valve system Probable cause

Range of Check  Malfunction of the EGR valve
 Ignition switch: OFF to ON  Open or short circuit in the EGR valve circuit or
 EGR valve is in operation after the engine starting process is complete. loose connector contact
Set Conditions  Malfunction of engine-ECU <M/T>
 Off–surge voltage is not generated from the motor coil while the EGR valve  Malfunction of engine-A/T-ECU <A/T>
control motor is running.
 GDI – Troubleshooting 13A-53
NG
Measure at EGR valve connector Replace
A-62.
 Disconnect the connector, and
measure at the EGR valve side.
 The resistance between terminals
1 and 2
 The resistance between terminals
2 and 3
 The resistance between terminals
4 and 5
 The resistance between terminals
5 and 6
OK: 10 – 20 Ω
OK
NG
Check the following connector: Repair
A-62
OK
NG NG
Measure at EGR valve connector Check the following connector: B-26 Repair
A-62.
OK
 Disconnect the connector and
measure at the harness side. Check the harness wire between the
 Ignition switch: ON EGR valve and the engine control
 The voltage between terminal 2 relay, and repair if necessary.
and earth
 The voltage between terminal 5
and earth
OK: System voltage
OK
NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-84<M/T> or engine-A/T-ECU B-84 <M/T>, B-85 <A/T>
connector B-85 <A/T>.
OK
 Measure the voltage at the
NG
engine-ECU terminal <M/T> or Check the harness wire between the Repair
engine-A/T-ECU terminal <A/T>. EGR valve and the engine-ECU <M/T>
 The voltage between terminal 5 or engine-A/T-ECU <A/T>.
<M/T>, 51 <A/T> and earth.
 The voltage between terminal 6 OK
<M/T>, 53 <A/T> and earth.
 The voltage between terminal 32 Replace the engine-ECU <M/T> or
<M/T>, 60 <A/T> and earth. engine-A/T-ECU <A/T>.
 The voltage between terminal 34
<M/T>, 62 <A/T> and earth.
OK: The voltage changes as follows
for three seconds when the
ignition switch is turned ON.
(When using a circuit tester)
5 V and 8 V alternates
(When using an analyzer)
1 V or less and system voltage
alternates
OK
NG
Check the following connectors: Repair
B-84 <M/T>, B-85 <A/T>
OK
NG
Check the harness wires between Repair
the EGR valve and the engine
control relay, and between the EGR
valve and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
OK Intermittent malfunction
Check the trouble symptoms.
(Refer to GROUP 00 – Points to
NG Note for Intermittent Malfunctions.)

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-54 GDI – Troubleshooting

Code No. P0420 Catalyst malfunction Probable cause

Range of Check  Malfunction of catalyst
 The engine speed is 3,000 r/min or less.  Malfunction of the oxygen sensor (front)
 During driving  Malfunction of the oxygen sensor (rear)
 During air/fuel ratio feedback control  Malfunction of engine-ECU <M/T>
Set Conditions  Malfunction of engine-A/T-ECU <A/T>
 The ratio between the oxygen sensor (rear) and the oxygen sensor (front)
output frequencies reaches 0.8 per 12 seconds on average.

NG
Check the exhaust manifold. (Are there any cracks?) Repair
OK
NG
MUT-II Data list Check the oxygen sensor (rear) system <sensor 2>
59 Oxygen sensor (rear) (Refer to P.13A-29, INSPECTION PROCEDURE FOR
 Transmission: 2nd gear <M/T>, L range <A/T> DIAGNOSTIC TROUBLE CODE P0136.)
 Drive with wide open throttle
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system <sensor 1>
11 Oxygen sensor (front) (Refer to P.13A-26, INSPECTION PROCEDURE FOR
OK: 600 – 1,000 mV when racing suddenly DIAGNOSTIC TROUBLE CODE P0130.)
OK
NG
MUT-II Data list Replace the oxygen sensor (front).
11 Oxygen sensor (front)
 Transmission: 2nd gear <M/T>, L range <A/T>
OK: Changeover between 0 – 400 mV and 600 – 1,000
mV occur 15 times in 10 seconds.
OK

Replace the oxygen sensor (rear).

Check the trouble symptoms.

NG

Replace the catalytic converter.

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

 GDI – Troubleshooting 13A-55
Code No. P0443 Purge control solenoid valve system Probable cause
Range of Check  Malfunction of the purge control solenoid valve
 Ignition switch: ON  Open or short circuit in the purge control solenoid
 Battery voltage is 10 V or more. valve circuit or loose connector contact
Set Conditions  Malfunction of engine-ECU <M/T>
 The solenoid coil surge voltage (battery voltage + 2 V) is not detected  Malfunction of engine-A/T-ECU <A/T>
when the purge control solenoid valve is turned from on to off.

OK
MUT-II Actuator Test Intermittent malfunction
08 Purge control solenoid valve (Refer to GROUP 00 – Points to
OK: Operating sound can be Note for Intermittent Malfunctions.)
heard and the valve vibrates.
NG
NG
Measure at the purge control Replace
solenoid valve connector A-58.
 Disconnect the connector, and
measure at the solenoid valve
side.
 The resistance between
terminals 1 and 2
OK: 28 – 36 Ω (at 20C)
OK
NG
Check the following connector: Repair
A-58
OK
NG
Measure at the purge control Check the following connector: NG
Repair
solenoid valve connector A-58. B-26
 Disconnect the connector and
measure at the harness side. NG
 Ignition switch: ON Check the harness wire between
 The voltage between terminal 2 the purge control solenoid valve and
and earth the engine control relay, and repair
OK: System voltage if necessary.
OK
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-84 <M/T> or engine-A/T-ECU B-84
connector B-84 <A/T>.
OK
 Measure the voltage at the
engine-ECU terminal <M/T> or Check the harness wire between NG
the purge control solenoid valve and Repair
engine-A/T-ECU terminal <A/T>.
 Ignition switch: ON the engine-ECU <M/T> or
 The voltage between terminal 16 engine-A/T-ECU <A/T>.
<M/T>, 34 <A/T> and earth OK
OK: System voltage
OK Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Check the following connector: Repair
B-84
OK
NG
Check the harness wires between Repair
the purge control solenoid valve and
the engine control relay, and
between the purge control solenoid
valve and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-56 GDI – Troubleshooting

Code No. P0500 Vehicle speed sensor system Probable cause

Range of Check  Malfunction of the vehicle speed sensor
 Engine: Two seconds after the engine was started  Open or short circuit in the vehicle speed sensor
 Idle switch: OFF circuit or loose connector contact
 Engine speed: 2,500 r/min or more  Malfunction of engine-ECU <M/T>
 During high engine load  Malfunction of engine-A/T-ECU <A/T>
Set Conditions
 The sensor output voltage does not change for 4 seconds (no pulse signal
input).

NO
Does the speedometer operate normally? Check the vehicle speed sensor
(Refer to GROUP 54 – Combination Meter.)
YES

NG
Use an analyzer to measure the output waveform of the Check the following connectors:
vehicle speed sensor at engine-ECU connector B-87 <M/T> B-87 <M/T>, B-86 <A/T>, B-19
or engine-A/T-ECU connector B-86 <A/T>. OK NG
 Driving the vehicle
 The voltage between terminal 80 and earth Repair
OK: A normal waveform should be displayed as de- Check the harness wire between intermediate connector B-19
scribed in OSCILLOSCOPE INSPECTION PROCE- and the engine-ECU <M/T> or engine-A/T-ECU <A/T>, and
DURE, and noise should not be displayed in the repair if necessary.
waveform. (Refer to GROUP 23 – Troubleshooting.)
OK
NG
Check the following connector: A-71 Repair
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

Code No. P1200 Injector driver system Probable cause

Range of Check  Malfunction of the injector driver
 Engine speed: 4,000 r/m or less  Open or short circuit, or loose connector contact
 Battery voltage: 10 V or more  Malfunction of engine-ECU <M/T>
 The fuel cut operation and the injector operation (by carrying out the  Malfunction of engine-A/T-ECU <A/T>
Actuator test) are not in progress.
 During high engine load
Set Conditions
 Injector open circuit check signal is not output from the injector driver.

NG
Check the following connector: B-87 <M/T>, B-85 <A/T> Repair
OK
NG
Check the harness wire between the injector driver and the Repair
engine-ECU <M/T> or engine-A/T-ECU <A/T>.
OK
NG
Use an analyzer to measure the signal waveform at Replace the injector driver.
engine-ECU connectors B-84, B-87 <M/T> or engine-A/T-ECU
connectors B-84, B-85 <A/T>.
 Engine: Idling
 The voltage between terminal 96 <M/T>, 63 <A/T> and
earth, terminal 1 and earth
OK: A normal waveform should be displayed as de-
scribed on P.13A-118 (INSPECTION PROCEDURE
USING AN ANALYZER).
OK
OK
Check the trouble symptoms. Intermittent malfunction
(Refer to GROUP 00 – Points to Note for Intermittent
NG
Malfunctions.)
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-57
Code No. P1220 Electronic-controlled throttle valve Probable cause
system
Range of Check  Short in communication line
 Ignition switch: ON  Malfunction of the engine-ECU <M/T>
 Error in communication between the engine-ECU <M/T> or engine-A/T-ECU  Malfunction of the engine-A/T-ECU <A/T>
<A/T> and the throttle valve controller  Malfunction of the throttle valve controller
Set Conditions
 Output voltage of throttle position sensor (2nd channel) fluctuates
significantly (approx. 1 V or more) from an expected value, based on that
of the accelerator pedal position sensor (2nd channel).
Range of Check
 Ignition switch: ON
 Error in communication between the throttle valve controller and the
engine-ECU <M/T> or engine-A/T-ECU <A/T>
Set Conditions
 The output voltage of the throttle position sensor (2nd channel) is
significantly different (approx. 1 V) from the throttle valve opening angle
(voltage), which the engine-ECU <M/T> or engine-A/T-ECU <A/T> request
the throttle valve controller.

Check the following connectors: NG

B-87 <M/T>, B-84 <A/T>, B-15 Repair
OK
NG
Check the harness wire between the throttle valve controller Repair
and the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
OK

Check the trouble symptoms.

NG

Replace the throttle valve controller.

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

13A-58 GDI – Troubleshooting

Code No. P1221 Throttle valve position feedback system Probable cause
The throttle valve controller judges a malfunction, and then transmit the result  Malfunction of throttle position sensor (1st
to the engine-ECU <M/T> or engine-A/T-ECU <A/T>. channel)
Range of Check  Open or short circuit in the throttle position
 Ignition switch: ON sensor (1st channel) circuit or loose connector
 Battery voltage: 10 V or more contact
Set Conditions  Malfunction of the throttle valve controller
 Failure in the motor position feedback
(The engine-ECU <M/T> or engine-A/T-ECU <A/T> detects that the current
in the motor is excessive and the opening angle difference between the
target value of throttle position sensor (1st channel) and the actual value of
throttle position sensor (1st channel) is 1.0 V or more)

YES
MUT-II Self-Diag Code Refer to Code No. P0120, Throttle position sensor (1st
Is code No. P0120 set? channel) system (Refer to P.13A-22.)
NO
YES
MUT-II Self-Diag Code Refer to Code No. P1224, Throttle valve control servo motor
Is Code No. P1224 set? (motor 1st phase malfunction) system (Refer to P.13A-60.)
NO
YES
MUT-II Self-Diag Code Refer to Code No. P1228, Throttle valve control servo motor
Is Code No. P1228 set? (motor 2nd phase malfunction) system (Refer to P.13A-63.)
NO

Adjust the throttle position sensor. (Refer to P.13A-96*.)

OK
NG
Check the throttle valve control servo. (Refer to P.13A-109*.) Replace the throttle body assembly.
OK
NG
Check the following connectors: A-66, A-68, B-15 Repair
NG
NG
Check the harness wires between the throttle position sensor Repair
and the throttle valve controller, and between the throttle
valve control servo and the throttle valve controller.
OK

Check the trouble symptoms.

NG

Replace the throttle valve controller.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 GDI – Troubleshooting 13A-59
Code No. P1223 Communication line system with the Probable cause
throttle valve controller
Range of Check  Short in communication line
 Ignition switch: ON  Malfunction of engine-ECU <M/T>
 Battery voltage: 8 V or more.  Malfunction of engine-A/T-ECU <A/T>
 Engine: Not cranking  Malfunction of throttle valve controller
Set Conditions
 System detects an error in communication line between the engine-ECU
<M/T> or engine-A/T-ECU <A/T> and the throttle valve controller, and
between the throttle valve controller and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

YES
MUT-II Self-Diag Code Refer to Code No. P1220,
Is Code No. P1220 output? Electronic-controlled throttle valve system
NO (Refer to P13A-57.)
NG
Check the following connector: Repair
B-15
OK
NG
(1) NG
Measure at throttle valve controller Check the following connector: Repair
connector B-15. B-26
 Measure voltage at the throttle
OK
valve controller connector
terminals. Check the harness wire between the
 Ignition switch: ON throttle valve controller and the engine
(1) The voltage between terminal 5 control relay, and repair if necessary.
and earth
OK: System voltage (2) NG
(2) The voltage between terminal 3 Check the harness wire between the
and earth throttle valve controller and earth, and
The voltage between terminal 4 repair if necessary.
and earth
The voltage between terminal 16
and earth
OK: 0.5 V or less
OK

NG
Check the following connectors: Repair
B-87 <M/T>, B-84 <A/T>
OK
NG
Check the harness wire between Repair
the throttle valve controller and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Check the trouble symptoms.
NG
Replace the throttle valve controller.

Check the trouble symptoms.

NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
13A-60 GDI – Troubleshooting

Code No. P1224 Throttle valve control servo motor Probable cause
(Motor 1st phase malfunction) system
Range of Check  Malfunction of the throttle valve control servo
 Throttle valve control servo relay: ON  Open circuit or short-circuited harness wire in
 System voltage: 8 V or more. throttle valve control servo system, or poor
Set Conditions connector contact
 Throttle valve control servo drive circuit is shorted to earth.  Malfunction of the throttle valve controller
 Other power source interferences with throttle valve control servo drive
circuit.
 Throttle valve control servo drive circuit is open circuit.

NG
Check the throttle valve control Replace the throttle body assembly.
servo (Refer to P.13A-109*.)
OK
NG Repair
Check the following connector:
B-15
OK
NG
Measure at throttle valve controller NG
Check the following connector: A-68 Repair
connector B-15.
 Measure voltage at the throttle OK
valve controller connector NG
terminals. Check the harness wire between the Repair
 Ignition switch: ON throttle valve control servo and the
 The voltage between terminal 1, throttle valve controller.
9 and earth OK
(Accelerator pedal: Fully open to
fully closed)
OK: The battery voltage tempo- Check the trouble symptoms
rarily shows a slight de- NG
crease.
 The voltage between terminal Replace the throttle valve controller.
14, 15 and earth
(Accelerator pedal: Fully closed
to fully open)
OK: The battery voltage show a
slight (approximately 2 V)
decrease.
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 GDI – Troubleshooting 13A-61
Code No. P1225 Accelerator pedal position sensor (2nd Probable cause
channel) system
Range of Check  Malfunction of accelerator pedal position sensor
 Accelerator pedal position sensor (2nd channel) is normal. (2nd channel)
 Communication between the engine-ECU <M/T> or engine-A/T-ECU <A/T>  Open or short circuit in accelerator pedal position
and the throttle valve controller is normal. sensor (2nd channel) circuit or loose connector
Set Conditions contact
 Output voltage of the accelerator pedal position sensor (2nd channel) is 0.2  Malfunction of the throttle valve controller
V or less for one second  Malfunction of engine-ECU <M/T>
or  Malfunction of engine-A/T-ECU <A/T>
 Output voltage of the accelerator pedal position sensor (1st channel) is 2.5
V or less, and output voltage of the accelerator pedal position sensor (2nd
channel) is 4.5 V or more for one second.
or
 Difference between the accelerator pedal position sensor (1st and 2nd
channels) output voltages exceeds 1.0 V (i.e. when the throttle valve
opening angle changes slightly).

OK
MUT-II Data list Intermittent malfunction
77 Accelerator pedal position sensor (Refer to GROUP 00 – Points to
(2nd channel) (Refer to Note for Intermittent Malfunctions.)
P.13A-99, DATA LIST
REFERENCE TABLE.)
NG
NG
Check the accelerator pedal position Replace
sensor (Refer to P.13A-127.)
OK
NG
Check the following connector: Repair
B-94
OK
(1) NG NG
Measure at accelerator pedal Check the following connector: Repair
position sensor connector B-94. B-15
 Disconnect the connector and
OK
measure at the harness side.
NG
(1) The resistance between terminal Check the harness wire between Repair
7 and earth accelerator pedal position sensor
OK: 2 Ω or less (2nd channel) and the throttle valve
(2) The voltage between terminal 8 controller.
and earth OK
(Ignition switch: ON)
OK: 4.8 – 5.2 V NG
Check the trouble symptoms. Replace the throttle valve controller.
(2) NG OK
Measure at throttle valve controller Check the following connector:
connector B-15. B-15
 Measure voltage at the throttle
OK NG
valve controller connector Repair
terminals.
 Ignition switch: ON
Check the harness wire between
 The voltage between terminal 6
accelerator pedal position sensor
and earth
(2nd channel) and the throttle valve
OK: 4.8 – 5.2 V
controller, and repair if necessary.
NG
NG
Check the following connector: Repair
B-15
OK
OK
NG
To the next page Check the harness wire between Repair
accelerator pedal position sensor
(2nd channel) and the throttle valve
controller.
OK
NG
Check the trouble symptoms. Replace the throttle valve controller.
13A-62 GDI – Troubleshooting

From the previous page

OK
(1) NG
Measure at accelerator pedal Adjust the accelerator pedal position
position sensor connector B-94. sensor (Refer to P.13A-121).
 Use test harness (MB991658) to
connect terminals No. 6, No. 7,
No. 8 only, and measure at the NG
Check the following connector: B-15 Repair
pick-up harness side.
 Ignition switch: ON OK
(1) The voltage between terminal 6
and earth Check the harness wire between
OK: Accelerator pedal fully re- accelerator pedal position sensor (2nd
leased: 0.985 – 1.085 V channel) and the throttle valve controller,
Accelerator pedal fully de- and repair if necessary.
pressed: 4.0 V or higher (2), (3) NG NG
(2) The voltage between terminal 7 Check the following connector: B-15 Repair
and earth
OK
OK: 0.5 V or more
(3) The voltage between terminal 8
and earth Check the harness wire between
OK: 4.8 – 5.2 V accelerator pedal position sensor (2nd
channel) and the throttle valve controller,
and repair if necessary.
OK
NG NG
Measure at throttle valve controller Check the following connector: B-15 Repair
connector B-15. OK
 Measure voltage at the throttle
valve controller connector Check the harness wire between
terminals. accelerator pedal position sensor (2nd
 Ignition switch: ON channel) and the throttle valve controller,
 The resistance between 20 and and repair if necessary.
earth
OK: Accelerator pedal fully re-
OK NG
leased: 0.985 – 1.085 V Check the following connector: B-15 Repair
Accelerator pedal fully de-
pressed: 4.0 V or higher OK

Check the trouble symptoms.

NG

Replace the throttle valve controller.

 GDI – Troubleshooting 13A-63
Code No. P1228 Throttle valve control servo motor Probable cause
(Motor 2nd phase malfunction) system
Range of Check  Malfunction of the throttle valve control servo
 Throttle valve control servo relay: ON  Open circuit or short-circuited harness wire in
 System voltage: 8 V or more throttle valve control servo system, or poor
Set Conditions connector contact
 Throttle valve control servo drive circuit is shorted to earth.  Malfunction of the throttle valve controller
 Other power source interferes with throttle valve control servo drive circuit.
 Throttle valve control servo drive circuit is open-circuit.

NG
Check the throttle valve control Replace the throttle body assembly.
servo (Refer to P.13A-109*).
OK
NG
Check the following connector: Repair
B-15
OK
NG NG
Measure at throttle valve controller Check the following connector: A-68 Repair
connector B-15.
 Measure voltage at the throttle OK
valve controller connector NG
Check the harness wire between the Repair
terminals.
 Ignition switch: ON throttle valve control servo and the
 The voltage between terminal 1, throttle valve controller.
9 and earth OK
(Accelerator pedal: Fully open to
fully closed) Check the trouble symptoms.
OK: The battery voltage tempo-
rarily shows a slight de- NG
crease.
 The voltage between terminal Replace the throttle valve controller.
14, 15 and earth
(Accelerator pedal: Fully closed to
fully open)
OK: The battery voltage show a
slight (approximately 2 V)
decrease.
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-64 GDI – Troubleshooting

Code No. P1500 Alternator FR terminal system Probable cause

Range of Check  Open circuit in alternator FR terminal circuit
 Engine speed: 50 r/min or more  Malfunction of engine-ECU <M/T>
Set Conditions  Malfunction of engine-A/T-ECU <A/T>
 Input voltage from the alternator FR terminal is system voltage for 20
seconds.

NG
Check the following connector: Repair
A-75
OK
NG NG
Measure at intermediate connector Measure at engine-ECU connector Check the following connectors:
A-75. B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
 Use test harness (MB991658) to connector B-85 <A/T>. OK NG
connect the connector, and  Measure the voltage at the Repair
measure at the pick-up harness. engine-ECU terminal <M/T> or
 Ignition switch: ON engine-A/T-ECU terminal <A/T>. Check the harness wire between
 The voltage between terminal 6  Ignition switch: ON the intermediate connector and the
and earth  The voltage between terminal 52 engine-ECU <M/T> or
OK: 9 – 10 V <M/T>, 54 <A/T> and earth engine-A/T-ECU <A/T>, and repair if
OK: 9 – 10 V necessary.
NG
NG
Check the following connectors: Repair
B-86 <M/T>, B-85 <A/T>
OK
NG
Check the harness wire between Repair
OK the intermediate connector and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG NG
Measure at intermediate connector Check the following connector: Repair
A-75. A-93
 Use test harness (MB991658) to OK
connect the connector, and
measure at the pick-up harness. Check the harness wire between NG
 Engine: Idling (After warming up) the alternator and the intermediate Repair
 Radiator fan: Not operating connector.
 The voltage between terminal 6 OK
and earth
OK: The voltage drops when Check the following connectors: NG
the headlamps are turned B-86 <M/T>, B-85 <A/T> Replace
on. OK

Check the harness wire between NG

the intermediate connector and the Repair
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK

Check the trouble symptoms.

NG
OK Replace the alternator.

OK
Check the trouble symptoms. Intermittent malfunction
NG (Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-65
Code No. P1515 Brake vacuum sensor system Probable cause
Range of Check  Malfunction of the brake vacuum sensor
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the brake vacuum
 Sensor output voltage is 4.8 V or more. sensor
or  Malfunction of the engine-ECU <M/T>
 Sensor output voltage is 0.2 V or less.  Malfunction of the engine-A/T-ECU <A/T>

OK
MUT-II Data list Intermittent malfunction (Refer to
66 Brake vacuum sensor GROUP 00 – Points to Note for
OK: (Refer to P.13A-99, DATA intermittent Malfunctions.)
LIST REFERENCE TABLE.)
NG
NG
Check the following connector: Repair
A-70
OK
(1) NG NG
Measure at brake vacuum sensor Measure at engine-ECU connector Check the following connector:
connector A-70 B-86 <M/T> or engine-A/T-ECU B-86
 Disconnect the connector and connector B-86 <A/T>.
OK NG
measure at the harness side.  Measure the voltage at the
(1) The voltage between terminal 3 engine-ECU <M/T> or engine- Repair
and earth A/T-ECU <A/T> connector Check the harness wire between
(Ignition switch: ON) terminals. the brake vacuum sensor and the
OK: 4.8 – 5.2 V  Ignition switch: ON engine-ECU <M/T> or
(2) Continuity between terminal 2  The voltage between terminal 41 engine-A/T-ECU <A/T>, and repair if
and earth <M/T>, 87 <A/T> and earth necessary.
OK: 2Ω or less OK: 4.8 – 5.2 V
OK
NG
Check the following connector: Repair
B-86
OK
NG
Check the harness wire between Repair
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T> .
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(2) NG NG
Check the following connectors: Repair
B-87 <M/T>, B-86 <A/T>
OK
OK
NG
To the next page. Check the harness wire between Repair
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T> .
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
13A-66 GDI – Troubleshooting

From the previous page

OK
(1) NG NG
Measure at brake vacuum sensor Check the following connector: Repair
connector A-70. B–86
 Use test harness (MB991348) to OK
connect terminals, and measure
at the pick-up harness side. Check the harness wire between
 Engine: Idling the brake vacuum sensor and the
(1) The voltage between 3 and earth engine-ECU <M/T> or
OK: 4.8 – 5.2 V engine-A/T-ECU <A/T>, and repair if
(2) The voltage between 1 and necessary.
earth (2) NG
OK: 0.9 – 1.5 V Replace the brake vacuum sensor
(3) The continuity between 2 and
earth
OK: 2 Ω or less Check the trouble symptoms.
NG NG
Check the following connectors: Repair
B–87 <M/T>, B–86 <A/T>
OK
Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
(3) NG necessary.
NG
Check the following connectors: Repair
OK B–87 <M/T>, B–86 <A/T>
OK
Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.
NG NG
Measure at engine-ECU connector Check the following connectors: Repair
B-87 <M/T> or engine-A/T-ECU B-87 <M/T>, B-86 <A/T>
connector B-86 <A/T>.
OK
 Measure the voltage at the
engine-A/T-ECU terminal. Check the harness wire between
 Engine: Idling the brake vacuum sensor and the
 The voltage between 74 and engine-ECU <M/T> or
earth <M/T> engine-A/T-ECU <A/T>, and repair if
The voltage between 96 and necessary.
earth <A/T>
OK: 0.9 – 1.5 V
OK

Check the following connectors:

B-87 <M/T>, B-86 <A/T>
OK
Check the trouble symptom.
NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-67
Cord No. P1610 Immobilizer system Probable cause
Range of Check  Open or short circuit, or loose connector contact
 Ignition switch: ON  Malfunction of the immobilizer-ECU
Set Conditions  Malfunction of the engine-ECU <M/T>
 Improper communication between the engine-ECU <M/T> or engine-A/T-ECU  Malfunction of the engine-A/T-ECU <A/T>
<A/T> and the immobilizer-ECU

NOTE
(1) If the registered ignition keys are close each other when starting the engine, radio interference may
cause this code to be displayed.
(2) This code may be displayed when registering the key ID code.
NG
Check the following connectors: Repair
B-19, B-36, B-87
OK
NG
Check the harness wire between the Replace
immobilizer-ECU and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK

Check the trouble symptoms.

NG

Replace the immobilizer-ECU.

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
13A-68 GDI – Troubleshooting

INSPECTION CHART FOR TROUBLE SYMPTOMS

Trouble symptom Inspection Reference page
procedure
No.

Communication Communication with all systems is not possible. 1 13A-69

with MUT-II is
impossible. Communication with engine-ECU only is not possible. 2 13A-71

Engine warning The engine warning lamp does not illuminate right after the 3 13A-70
lamp and ignition switch is turned to the ON position.
related parts
The engine warning lamp remains illuminating and never goes 4 13A-70
out.

Starting No initial combustion (starting impossible) 5 13A-71

Initial combustion but no complete combustion 6 13A-73

(starting impossible)

Long time to start (improper starting)

Idling stability Unstable idling (Rough idling, hunting) 7 13A-74

(Improper idling)
Idling speed is high. (Improper idling speed) 8 13A-76

Idling speed is low. (Improper idling speed)

Idling stability When the engine is cold, it stalls at idling. (Die out) 9 13A-77
(Engine stalls)
When the engine is hot, it stalls at idling. (Die out) 10 13A-78

The engine stalls when starting the car. (Pass out) 11 13A-80

The engine stalls when decelerating. 12 13A-81

Driving Hesitation, sag or stumble 13 13A-82

Poor acceleration

Surge

The feeling of impact or vibration when accelerating 14 13A-83

The feeling of impact or vibration when decelerating 15 13A-84

Knocking 16 13A-84

Dieseling 17 13A-84

Too high CO and HC concentration when idling 18 13A-85

Low alternator output voltage (approx. 12.3 V) 19 13A-86

Engine idle speed is incorrect while the A/C is on. 20 13A-87

Fans (radiator fan, A/C condenser fan) are inoperative 21 13A-87

Clutch switch system malfunction <M/T> 22 13A-88

GDI ECO indi- GDI ECO indicator lamp does not illuminate. 23 13A-88
cator lamp sys-
tem GDI ECO indicator lamp remains illuminated and does not go off. 24 13A-89
 GDI – Troubleshooting 13A-69
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication with MUT-II is not possible. Probable cause
(Communication with all systems is not possible.)
The cause is probably a defect in the power supply system (including earth) for  Malfunction of the connector
the diagnosis line.  Malfunction of the harness wire
 Malfunction of MUT-II

NG NG
Measure at the diagnostic connector Check the following connectors: Repair
(16-pin) B-35. B-75, B-81
 Voltage between 16 and earth OK
OK: System voltage
NG
OK Check trouble symptom. Check the harness wire between the
power supply and diagnostic connector
(16-pin), and repair if necessary.
NG
Measure at the diagnostic connector Check the harness wire between the
(16-pin) B-35. diagnostic connector (16-pin) and
 Continuity between 4 and earth earth, and repair if necessary.
 Continuity between 5 and earth
OK: Continuity
OK

Replace the MUT-II.

INSPECTION PROCEDURE 2
MUT-II communication with engine-ECU (engine- Probable cause
A/T-ECU) is impossible.
One of the following causes may be suspected.  Malfunction of engine-ECU <M/T> or engine-A/T-ECU
 No power supply to engine-ECU <M/T> or engine-A/T-ECU <A/T>. <A/T> power supply circuit
 Defective earth circuit of engine-ECU <M/T> or engine-A/T-ECU <A/T>.  Malfunction of engine-ECU <M/T> or engine-A/T-ECU
 Defective engine-ECU <M/T> or engine-A/T-ECU <A/T>. <A/T>
 Improper communication line between engine-ECU <M/T> or engine-A/T-ECU  Open circuit between the engine-ECU <M/T> or
<A/T> and MUT-II engine-A/T-ECU <A/T> and diagnosis connector

NG
Check the following connectors: Repair
B-87<M/T>, B-86<A/T>, B-09, B-35, B-60X, B-61X
OK

Check trouble symptom.

NG
NG
Check the harness wire between engine-ECU <M/T> or engine- Repair
A/T-ECU <A/T> and diagnosis connector.
OK

Check the engine-ECU (engine-A/T-ECU) power supply and earth

circuit system.
(Refer to P.13A-90, INSPECTION PROCEDURE 25.)

NOTE
On vehicles with multi center display, if a malfunction cannot be resolved after the procedure above, check the multi
center display and replace if necessary. (Refer to GROUP 54 – Multi Center display.)
13A-70 GDI – Troubleshooting

INSPECTION PROCEDURE 3
The engine warning lamp does not illuminate right after Probable cause
the ignition switch is turned to the ON position.
Because there is a burnt-out bulb, the engine-ECU <M/T> or engine-A/T-ECU <A/T>  Burnt-out bulb
causes the engine warning lamp to illuminate for five seconds immediately after  Defective warning lamp circuit
the ignition switch is turned to ON. If the engine warning lamp does not illuminate  Malfunction of the engine-ECU <M/T>
immediately after the ignition switch is turned to ON, one of the malfunctions listed  Malfunction of the engine-A/T-ECU <A/T>
at right has probably occurred.

NG
MUT-II Data list Check the engine-ECU (engine-A/T-ECU) power supply and earth
16 engine-ECU (engine-A/T-ECU) power supply voltage (Refer circuit system.
to P.13A-99.) (Refer to P.13A-90, INSPECTION PROCEDURE 25.)
OK
OK NG
Measure at the engine-ECU connector B-84 <M/T> or engine- Check the following Repair
A/T-ECU connector B-84 <A/T>. connector: B-84
 Disconnect the connector, and measure at the harness side.
 Earth the terminal No. 31 <M/T> or 22 <M/T>. OK
OK: The engine warning lamp illuminates.
NG Check trouble symptom.
NG
NG Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
Check a burnt-out bulb. Replace
OK
NG
Measure at the combination meter connector B-01. Check the engine warning lamp power supply circuit, and repair
 Disconnect the connector, and measure at the harness side. if necessary.
 Voltage between 49 and earth (Ignition switch: ON)
OK: System voltage
OK
NG
Check the following connectors: Repair
B-02, B-19, B-84
OK
NG
Check trouble symptom. Check the harness wire between combination meter and engine-
ECU <M/T> or engine-A/T-ECU <A/T>, and repair if necessary.

INSPECTION PROCEDURE 4
The engine warning lamp remains illuminating and never Probable cause
goes out.
In cases such as the above, the cause is probably that the engine-ECU <M/T>  Short-circuit between the engine warning lamp and
or engine-A/T-ECU <A/T> is detecting a problem in a sensor or actuator, or that engine-ECU
one of the malfunctions listed at right has occurred.  Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

Yes
MUT-II Self-Diag code Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Measure at the combination meter connector B-02. Check the harness wire between combination meter and engine-
 Disconnect the connector, and measure at the harness side. ECU <M/T> or engine-A/T-ECU <A/T> connector, and repair if
 Disconnect the engine-ECU connector <M/T> or necessary.
engine-A/T-ECU connector <A/T>
 Continuity between 4 and earth
OK: No continuity
OK

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

 GDI – Troubleshooting 13A-71
INSPECTION PROCEDURE 5
No initial combustion (starting impossible) Probable cause
This is caused by incorrect fuel supply into the combustion chamber, and improper  Malfunction of the fuel supply system
ignition circuit. Besides that, foreign material may be contaminated in fuel.  Malfunction of the ignition system
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG
Check system voltage while the engine is cranking. Check the battery. (Refer to GROUP 55 – Battery.)
OK: 8 V or more
OK
Yes
MUT-II Self-Diag code Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.
No
NG
MUT-II Data list Check the engine control relay and ignition switch-IG system.
16 System voltage (Refer to P.13A-99.)
OK (Refer to P.13A-91, INSPECTION PROCEDURE 26.)
No
Does the camshaft rotate when the engine is cranking? Check if the timing belt is broken or damaged.
Yes
NG
MUT-II Actuator test Check the fuel pump (low pressure) system.
07 Fuel pump (low pressure) (Refer to P.13A-105.) (Refer to P.13A-95, INSPECTION PROCEDURE 30.)
OK
NG
MUT-II Data list Check the crank angle sensor system. (Refer to P.13A-48, IN-
22 Crank angle sensor (Refer to P.13A-99.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0335.)
OK NG
Check the engine coolant temperature sensor system.
MUT-II Data list (Refer to P.13A-19, INSPECTION PROCEDURE FOR DIAGNO-
21 Engine coolant temperature sensor (Refer to P.13A-99.) SIS CODE P0115.)
OK
NG
MUT-II Data list Check the throttle position sensor (1st channel) system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-22, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P0120.)
OK
Inspect engine start ability by cranking the engine while the Clean around the throttle valve. (Refer to P.13A-96*.)
accelerator pedal is slightly depressed.
NG
NG
Measure at injector driver connector A-52. Check the injector driver system.
 Disconnect the connector, and measure at the connector side. (Refer to P.13A-92, INSPECTION PROCEDURE 27.)
 Voltage between each of terminals 12, 21 and earth
(Ignition switch: ON)
OK: System voltage
OK
NG
Check fuel leakage. (Refer to P.13A-125.) Repair
OK
NG
Measure low fuel pressure between the fuel pump (low pressure) Repair
and fuel pump (high pressure). (Refer to P.13A-122.)
OK
NG
Measure at ignition coil connectors A-85, A-86, A-89, A-91. Check the ignition coil (incorporating power transitor) system.
 Connect the connector. (Refer to P.13A-45, INSPECTION PROCEDURE FOR DIAGNO-
 Connect a timing light to the No. 1 terminal of each connector SIS CODE P0300.)
in turn.
(Engine cranking)
OK: The timing light flashes.
OK
NG
Check ignition timing while the engine is cranking. Check that the crank angle sensor and timing belt cover are proper-
OK: Approx. 5 BTDC ly installed.
OK

To the next page

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-72 GDI – Troubleshooting

From the previous page

OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

 Spark plug
 Compression pressure
 Foreign material (such as water or kerosine) entered the fuel
lines
OK
NG
Check trouble symptom. Replace the injector.
 GDI – Troubleshooting 13A-73
INSPECTION PROCEDURE 6
Initial combustion takes place, but does not complete Probable cause
(start impossible), too long time to start (poor start)
This may be caused by improper spark plug ignition (poor spark), improper mixture  Malfunction of the fuel supply system
during engine cranking, improper fuel pressure.  Malfunction of the fuel pressure sensor
 Malfunction of the ignition system
 Malfunction of the electronic-controlled throttle valve
system
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG
Check system voltage while the engine is cranking. Check the battery. (Refer to GROUP 55 – Battery.)
OK: 8 V or more
OK
Yes
MUT-II Self-Diag code Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.
No
NG
MUT-II Actuator test Check the fuel pump (low pressure) system.
07 Fuel pump (low pressure) (Refer to P.13A-105.) (Refer to P.13A-95, INSPECTION PROCEDURE 30.)
OK
NG
MUT-II Data list Check the engine coolant temperature system. (Refer to P.13A-19,
21 Engine coolant temperature sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
OK
NG
MUT-II Data list Check the ignition switch-ST system.
18 Cranking signal (Refer to P.13A-99.) (Refer to P.13A-93, INSPECTION PROCEDURE 28.)
OK
NG
MUT-II Data list Check an abnormal fuel pressure system. (Refer to P.13A-34,
74 Fuel pressure sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0190.)
OK
NG
Check fuel leakage. (Refer to P.13A-125.) Repair
OK
Yes
Is the engine started normally when it is cranked with the accelera- Clean around the throttle valve. (Refer to P.13A-96*.)
tor pedal depressed slightly?
No
NG
MUT-II Data list Check the throttle valve position feedback system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P1221.)
NG
Check ignition timing when the engine is cranked. Check that the crank angle sensor and timing belt cover are proper-
OK: approx. 5 BTDC ly installed.
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

 Spark plug
 Compression pressure
 Foreign material (such as water or kerosine) entered the fuel
lines
OK
NG
Check trouble symptom. Replace the injector.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-74 GDI – Troubleshooting

INSPECTION PROCEDURE 7
Unstable idling (rough idle, hunting) Probable cause
This malfunction is probably caused by a faulty ignition system, improper air/fuel  Malfunction of the ignition system
ratio, a faulty electronic-controlled throttle valve system, improper compression  Malfunction of the air/fuel ratio control system
pressure, etc. As many causes can be suspected, diagnose from easier items.  Malfunction of the electronic-control throttle valve
system
 Improper compression pressure
 Air sucking into the air intake system

Yes
Has the battery been disconnected recently? Warm up the engine, and then let it run at idle for approx. ten
minutes.
No
Yes
MUT-II Self-Diag code Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.
No
Yes
Does the engine idle speed fluctuates excessively (excessive Clean around the throttle valve. (Refer to P.13A-96*.)
hunting)?
No
NG
MUT-II Data list Check the throttle valve position feedback system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P1221.)
NG
MUT-II Data list Check the accelerator pedal position switch system. (Refer to
26 Accelerator pedal position switch (Refer to P.13A-99.) P.13A-94, INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the intake air temperature sensor system.
13 Intake air temperature sensor (Refer to P.13A-99.) (Refer to P.13A-18, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P0110.)
NG
MUT-II Data list Check the barometric pressure sensor system. (Refer to P.13A-16,
25 Barometric pressure sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-19,
21 Engine coolant temperature sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve system. (Refer to P.13A-55,
08 Purge control solenoid valve (Refer to P.13A-105.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.)
OK
NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13A-29, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear <M/T>, L range <A/T>
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system. (Refer to P.13A-26, IN-
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK

To the next page

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 GDI – Troubleshooting 13A-75
From the previous page
OK
NG
MUT-II Data list Measure fuel high-pressure between the fuel pump (high pressure)
11 Oxygen sensor (front) and injector. (Refer to P.13A-124.)
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the OK
engine is idling (wait for four minutes after the engine NG
started).
Repair
OK Check that air is sucked in the air intake system.
 Broken intake manifold gasket
 Damaged vacuum hose
 Damaged air intake hose
NG
MUT-II Data list Check the power steering fluid pressure switch system. (Refer
27 Power steering fluid pressure switch (Refer to P.13A-99.) to P.13A-96, INSPECTION PROCEDURE 31.)
OK

MUT-II Data list NG Check the A/C switch and A/C relay system. (Refer to P.13A-96,
28 A/C switch (Refer to P.13A-99.) INSPECTION PROCEDURE 32.)
OK

MUT-II Data list NG Check the M/T oil temperature sensor system. (Refer to P.13A-97,
48 M/T oil temperature sensor (Refer to P.13A-99.) INSPECTION PROCEDURE 33.)
OK
NG Check the stop lamp switch. (Refer to P.13A-98, INSPECTION
MUT-II Data list
67 Stop lamp switch (Refer to P.13A-99.) PROCEDURE 34.)
OK
MUT-II Data list NG Check the small lamp switch system. (Refer to P.13A-98, INSPEC-
31 Small lamp switch (Refer to P.13A-99.) TION PROCEDURE 35.)
OK
NG
MUT-II Data list Check the EGR valve. (Refer to P.13A-52, INSPECTION PROCE-
68 EGR valve (Refer to P.13A-99.) DURE FOR DIAGNOSIS CODE P0403.)
OK
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are proper-
OK ly installed.

Clean around the throttle valve. (Refer to P.13A-96*.)

Check trouble symptom.

NG
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK
Check all the following items in that order.
(1) Spark plugs
(2) Exhaust gas emission control system
(3) EGR system
(4) Compression pressure
(5) Foreign material (such as water or kerosine) entered the fuel
line.
(6) Air is sucked in the air intake system, or EGR gas leaks.
 Damaged intake manifold gasket
 Damaged air intake hose
 Damaged vacuum hose
 Faulty EGR valve seat

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-76 GDI – Troubleshooting

INSPECTION PROCEDURE 8
Idle speed is high or low (Improper idling) Probable cause
The cause is probably that the intake air amount during idling is too great or too  Malfunction of the electronic-controlled throttle valve
small. system
 Malfunction of the throttle body

Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the throttle valve position feedback system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P1221.)
NG
MUT-II Actuator test Check the purge control solenoid valve. (Refer to P.13A-55, IN-
08 Purge control solenoid valve (Refer to P.13A-105.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.)
OK
NG
MUT-II Data list Check the accelerator pedal position switch system.
26 Accelerator pedal position switch (Refer to P.13A-99.) (Refer to P.13A-94, INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-19,
21 Engine coolant temperature sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
OK
NG
MUT-II Data list Check the A/C switch and A/C relay system.
28 A/C switch (Refer to P.13A-99.) (Refer to P.13A-96, INSPECTION PROCEDURE 32.)
OK
NG
MUT-II Data list Check the M/T oil temperature sensor.
48 M/T oil temperature sensor (Refer to P.13A-99.) (Refer to P.13A-32, INSPECTION PROCEDURE 34.)
OK
NG
MUT-II Data list Check the stop lamp switch system.
67 Stop lamp switch (Refer to P.13A-99.) (Refer to P.13A-98, INSPECTION PROCEDURE 34.)
OK

 Clean around the throttle valve. (Refer to P.13A-96*.)

 Adjust the throttle position sensor. (Refer to P.13A-96*.)

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 GDI – Troubleshooting 13A-77
INSPECTION PROCEDURE 9
When the engine is cold, it stalls at idling. (Die out) Probable cause
The cause is probably an incorrect air/fuel ratio or poor intake air amount when  Malfunction of the electronic-control throttle valve
the engine is cold. system
 Malfunction of the throttle body

Yes
Have the battery terminals been disconnected recently? Warm up the engine, and then let it run at idle for approx. ten
No minutes.
Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
Yes
Is the engine idling correct after the engine has been warmed up? Refer to “Unstable idling (rough idle, hunting).
(Refer to P.13A-74, INSPECTION PROCEDURE 7.)
No
NG
MUT-II Data list Check the throttle valve position feedback system.
22 Crank angle sensor (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
Check idling speed when the engine is cold. SIS CODE P1221.)
OK
NG
MUT-II Data list Check the accelerator position switch.
26 Accelerator pedal position switch (Refer to P.13A-99.) (Refer to P.13A-94, INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-19,
21 Engine coolant temperature sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
OK
NG
MUT-II Data list Check the EGR valve system. (Refer to P.13A-52, INSPECTION
68 EGR valve (Refer to P.13A-99.) PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
Yes
Does the engine stall immediately after the accelerator pedal is Clean around the throttle valve. (Refer to P.13A-96*.)
released?
No

Measure fuel high pressure between the fuel pump (high pressure) NG
and injector. (Refer to P.13A-124.) Repair
OK
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are proper-
OK ly installed.
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK
OK
Check all the following items: Check trouble symptom.
 Spark plugs NG
 Compression pressure
 Engine oil viscosity
Replace the injector.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-78 GDI – Troubleshooting

INSPECTION PROCEDURE 10
When the engine is hot, it stalls at idling. (Die out) Probable cause
The cause is probably an improper air/fuel ratio, faulty electronic-controlled throttle  Malfunction of the ignition system
valve system, compression pressure. In addition, if the engine stalls suddenly, another  Malfunction of air/fuel ratio control system
possible cause might be a poor connector contact.  Malfunction of electronic-controlled throttle valve
system
 Malfunction of the throttle body
 Poor connector contact
 Improper compression pressure
 Air stuck in the air intake system

Yes
Have the battery terminals been disconnected recently? Warm up the engine, and then let it run at idle for approx. ten
No minutes.
Yes
MUT-II Self-Diag code Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.
No
NG
MUT-II Data list Check the throttle valve position feedback system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P1221.)
No
Is it easy to reproduce the engine stall? While carrying out an intermittent malfunction simulation test. (Re-
fer to GROUP 00 – Points to Note for Intermittent Malfunction.),
Yes check for sudden changes in the following signals.
 Crank angle sensor signal
 Injector drive signal
 Fuel pump (low pressure) drive signal
 Air flow sensor
 Primary ignition signal
 Power supply to the engine-ECU <M/T> or engine-A/T-ECU
<A/T>
NG
MUT-II Data list Check the accelerator pedal position switch.
26 Accelerator pedal position switch (Refer to P.13A-99.) (Refer to P.13A-94, INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the intake air temperature sensor. (Refer to P.13A-18, IN-
13 Intake air temperature sensor (Refer to P.13A-99.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)
OK
NG
MUT-II Data list Check the barometric pressure sensor. (Refer to P.13A-16, IN-
25 Barometric pressure sensor (Refer to P.13A-99.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-19,
21 Engine coolant temperature sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
OK

MUT-II Data list NG Check the oxygen sensor (rear) system. (Refer to P.13A-29, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear <M/T>, L range <A/T>
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system. (Refer to P.13A-26, IN-
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK
NG
MUT-II Data list Measure fuel high-pressure between the fuel pump (high pressure)
11 Oxygen sensor (front) and injector. (Refer to P.13A-124.)
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the OK NG
engine is idling (wait for four minutes after the engine
started). Repair
OK Check that air is sucked in the air intake system.
 Broken intake manifold gasket
To the next page
 Damaged vacuum hose
 Damaged air intake hose
 GDI – Troubleshooting 13A-79
From the previous page
OK
NG
MUT-II Data list Check the power steering fluid pressure switch system.
27 Power steering fluid pressure switch (Refer to P.13A-99.) (Refer to P.13A-96, INSPECTION PROCEDURE 31.)
OK
NG
MUT-II Data list Check the A/C switch and A/C relay system.
28 A/C switch (Refer to P.13A-99.) (Refer to P.13A-96, INSPECTION PROCEDURE 32.)
OK
NG
MUT-II Data list Check the small lamp switch system.
31 Small lamp switch (Refer to P.13A-99.) (Refer to P.13A-98, INSPECTION PROCEDURE 35.)
OK
NG
MUT-II Data list Check the air flow sensor system. (Refer to P.13A-14, INSPEC-
34 Air flow sensor reset signal (Refer to P.13A-99.) TION PROCEDURE FOR DIAGNOSIS CODE P0100.)

OK
NG
MUT-II Data list Check the EGR valve. (Refer to P.13A-52, INSPECTION PROCE-
68 EGR valve (Refer to P.13A-99.) DURE FOR DIAGNOSIS CODE P0403.)
OK
Yes
Does the engine stall immediately after the accelerator pedal is Clean around the throttle valve. (Refer to P.13A-96*.)
released?
No
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are proper-
OK ly installed.

Check ignition coil spark for each cylinder.

(1) Remove the ignition coil. NG
(2) Install a new spark plug to the removed ignition coil. Replace the ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

 Spark plugs
 Compression pressure
 Foreign material (such as water or kerosine) entered the fuel
lines

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-80 GDI – Troubleshooting

INSPECTION PROCEDURE 11
The engine stalls when starting the car. (Pass out) Probable cause
The cause is probably poor ignition due to a malfunctioning spark plug (weak spark),  Malfunction of the ignition system
or an incorrect air/fuel ratio when the accelerator is depressed.  Malfunction of the EGR valve
 Air stuck in the air intake system

Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the EGR valve. (Refer to P.13A-52, INSPECTION PROCE-
68 EGR valve (Refer to P.13A-99.) DURE FOR DIAGNOSIS CODE P0403.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve system. (Refer to P.13A-55,
08 Purge control solenoid valve (Refer to P.13A-105.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.)
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

(1) Spark plug
(2) Check if air is stuck in the air intake system.
 Damage intake manifold gasket
 Damaged or disconnected vacuum hose
 Damaged air intake hose
 GDI – Troubleshooting 13A-81
INSPECTION PROCEDURE 12
The engine stalls when decelerating. Probable cause
The cause is probably an improper air/fuel ratio due to a faulty EGR system, or  Malfunction of the electronic-controlled throttle valve
poor intake air volume due to a faulty electronic-controlled throttle valve system. system
 Malfunction of the EGR valve

Yes
Have the battery terminals been disconnected recently? Warm up the engine, and then let it run at idle for approx. ten
No minutes.
Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the accelerator pedal position switch.
26 Accelerator pedal position switch (Refer to P.13A-99.) (Refer to P.13A-94, INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the throttle valve position feedback system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P1221.)
NG
MUT-II Data list Check the EGR valve system. (Refer to P.13A-52, INSPECTION
68 EGR valve (Refer to P.13A-99.) PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
NG
Check ignition coil spark for each cylinder. Replace the ignition coil.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK

Check all the following items:

 Spark plug
 Clean around the throttle valve (Refer to P.13A-96*.)

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-82 GDI – Troubleshooting

INSPECTION PROCEDURE 13
Hesitation, sag, stumble, poor acceleration or surge Probable cause
The cause is probably a malfunction of the ignition system, electronic-controlled  Malfunction of the ignition system
throttle valve system, compression pressure, etc.  Malfunction of the air/fuel ratio control system
 Malfunction of the electronic-controlled throttle valve
system
 Improper compression pressure
 Air stuck in the air intake system

Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are proper-
OK ly installed.
NG
MUT-II Data list Check the accelerator pedal position switch.
26 Accelerator pedal position switch (Refer to P.13A-99.) (Refer to P.13A-94, INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the intake air temperature sensor. (Refer to P.13A-18, IN-
13 Intake air temperature sensor (Refer to P.13A-99.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)
OK
NG
MUT-II Data list Check the barometric pressure sensor. (Refer to P.13A-16, IN-
25 Barometric pressure sensor (Refer to P.13A-99.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-19,
21 Engine coolant temperature sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
OK
NG
MUT-II Data list Check the throttle valve position feedback system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P1221.)
NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13A-29, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear <M/T>, L range <A/T>
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system. (Refer to P.13A-26, IN-
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK
NG
MUT-II Data list Measure fuel high-pressure between the fuel pump (high pressure)
11 Oxygen sensor (front) and injector. (Refer to P.13A-124.)
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the OK
engine is idling (wait for four minutes after the engine
started). Check that air is sucked in the air intake system.
OK  Broken intake manifold gasket
 Damaged vacuum hose
 Damaged air intake hose

NG
MUT-II Data list Check the EGR valve. (Refer to P.13A-52, INSPECTION PROCE-
68 EGR valve (Refer to P.13A-99.) DURE FOR DIAGNOSIS CODE P0403.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve. (Refer to P.13A-55, IN-
08 Purge control solenoid valve (Refer to P.13A-105.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.)
OK
To the next page
 GDI – Troubleshooting 13A-83
From the previous page
OK
NG
Measure high fuel pressure between the fuel pump (high pressure) Repair
and injector. (Refer to P.13A-124.)
OK
NG Replace the ignition coil.
Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK
OK
Check all the following items: Check trouble symptom.
 Spark plug
 EGR system NG
 Compression pressure
 Clogged fuel filter, fuel line Replace the injector.

INSPECTION PROCEDURE 14
The feeling of impact when accelerating Probable cause
The cause is probably an ignition leak being generated in line with an increase  Malfunction of the ignition system
in the spark plug request voltage during acceleration.

Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the throttle valve position feedback system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P1221.)
OK
OK
Check ignition coil spark for each cylinder. Check all the following items:
(1) Remove the ignition coil.  Spark plug
(2) Install a new spark plug to the removed ignition coil.  Ignition current leak
(3) Disconnect the injector intermediate connector.
Caution NG
Never touch the connector terminal as approx. 100 V is Replace the ignition coil.
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
13A-84 GDI – Troubleshooting

INSPECTION PROCEDURE 15
The feeling of impact when decelerating Probable cause
The cause is probably insufficient intake air due to a faulty electronic-controlled  Malfunction of the electronic-controlled throttle valve
throttle valve system. system

Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
MUT-II Data list Check the throttle valve position feedback system.
79 Throttle position sensor (1st channel) (Refer to P.13A-99.) (Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P1221.)
OK
NG
MUT-II Data list Check the accelerator pedal position switch system.
26 Accelerator pedal position switch (Refer to P.13A-99.) (Refer to P.13A-94, INSPECTION PROCEDURE 29.)
OK

Clean around the throttle valve. (Refer to P.13A-96*.)

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

INSPECTION PROCEDURE 16
Knocking Probable cause
The cause is probably incorrect detonation control or improper heat range of the  Malfunction of the detonation sensor
spark plugs.  Improper heat range of the spark plugs

Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
No
Does knocking occur when the vehicle is driven with the detonation Check the detonation sensor system. (Refer to P.13A-48, INSPEC-
sensor disconnected? TION PROCEDURE FOR DIAGNOSIS CODE P0325.)
(At this time, use the MUT-II to check whether the ignition timing
is retarded from when the detonation sensor connector is con-
nected.)
Yes
Check all the following items:
 Spark plug
 Foreign material (such as water or kerosine) entered the fuel
lines

INSPECTION PROCEDURE 17
Run-on (dieseling) Probable cause
The cause is probably fuel leak from injector(s)  Malfunction of the injector

Replace the injector.

 GDI – Troubleshooting 13A-85
INSPECTION PROCEDURE 18
Too high CO and HC concentration when idling Probable cause
The cause is probably an incorrect air/fuel ratio  Malfunction of air/fuel ratio control system
 Deterioration of the catalyst

Yes
MUT-II Self-Diag code (Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
Is a diagnosis code displayed? CODES.)
No
NG
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.) Check that the crank angle sensor and timing belt cover are proper-
OK ly installed.
NG
MUT-II Data list Check the engine coolant temperature sensor. (Refer to P.13A-19,
21 Engine coolant temperature sensor (Refer to P.13A-99.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
OK
NG
MUT-II Data list Check the intake air temperature sensor. (Refer to P.13A-18, IN-
13 Intake air temperature sensor (Refer to P.13A-99.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)
OK
NG
MUT-II Data list Check the barometric pressure sensor. (Refer to P.13A-16, IN-
25 Barometric pressure sensor (Refer to P.13A-99.) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)
OK
NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13A-29, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear <M/T>, L range <A/T>
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG Check the oxygen sensor (front) system. (Refer to P.13A-26, IN-
MUT-II Data list
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK
OK
MUT-II Data list Replace the oxygen sensor (front).
11 Oxygen sensor (front)
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the
engine is idling (wait for four minutes after the engine Check trouble symptom.
started). NG
NG
NG
Measure fuel high-pressure between the fuel pump (high pressure) Repair
and injector. (Refer to P.13A-124.)
OK

Check ignition coil spark for each cylinder.

(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK NG

Check all the following items: Replace the ignition coil.

 Spark plug
 EGR system
 Compression pressure
 Clogged fuel filter or line
OK

To the next page

13A-86 GDI – Troubleshooting

From the previous page

OK
NG
MUT-II Data list Check the EGR valve system. (Refer to P.13A-52, code No.
68 EGR valve (Refer to P.13A-99.) P0403.)
OK
NG
MUT-II Actuator test Check purge control solenoid valve system. (Refer to P.13A-55,
08 Purge control solenoid valve (Refer to P.13A-105.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.)
OK
NG
Check trouble symptom. Replace the injector.

Check trouble symptom.

NG
Replace the three-way catalytic converter.

INSPECTION PROCEDURE 19
Low alternator output voltage (approx. 12.3 V) Probable cause
The cause is probably a malfunction of the alternator or one of the problems  Malfunction of the charging system
listed at right.  Open circuit between the alternator G terminal
and the engine-ECU <M/T> or engine-A/T-ECU
<A/T>
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG NG
Measure at the alternator connector Measure at the alternator connector Check the harness wire between
A-93. A-93. the alternator and the engine-ECU
 Connect the connector. (Use the  Disconnect the connector, and <M/T> or engine-A/T-ECU <A/T>,
test harness MB991519) measure at the harness side. and repair if necessary.
 Voltage between 1 (black clip)  Disconnect the engine-ECU
and earth connector <M/T> or
(Engine: Idling) engine-A/T-ECU connector <A/T>.
(Radiator fan: Not operating)  Continuity between 1 and earth
(Headlamp: OFF → ON) OK: No continuity
(Stop lamp: OFF → ON) OK
(Rear defogger switch: OFF →
ON) NG
Check the following connectors: Repair
OK: Voltage increased by
A-75, A-93, B-84
0.2 – 3.5 V.
OK
OK
Replace the engine-ECU <M/T> or en-
Check the alternator. (Refer to GROUP
gine-A/T-ECU <A/T>.
16 – Charging System.)
 GDI – Troubleshooting 13A-87
INSPECTION PROCEDURE 20
Idling speed is improper when A/C is operating Probable cause
If the engine-ECU <M/T> or engine-A/T-ECU <A/T> detects that the air conditioner  Malfunction of the A/C control system
is on, it activates the throttle control servo to control idle-up operation.  Improper connector contact, open circuit or
The A/C-ECU judges if the load caused by air conditioner operation is high or low, short-circuited harness wire
and converts it to voltage signal (high or low voltage) and inputs the signal to the  Malfunction of the engine-ECU <M/T>
engine-ECU <M/T> or engine-A/T-ECU <A/T>.  Malfunction of the engine-A/T-ECU <A/T>
Based on this voltage signal, the engine-ECU <M/T> or engine-A/T-ECU <A/T>
controls the idle-up speed (for high or low load).

OK
Measure at the engine-ECU connector B-86 <M/T> or engine- Check the following connector:
A/T-ECU connector B-85 <A/T>. B-86 <M/T>, B-85 <A/T>
 Connect the connector. OK NG
 Voltage between 65 <M/T>, 61 <A/T> and earth (Engine: at
idle, outside air temperature: 25C or more)
Repair
OK: 0 – 3 V [When A/C is MAX. COOL condition (when
the load by A/C is high)]
Check trouble symptom.
System voltage [When A/C is MAX. HOT condition (when
the load by A/C is low)] NG
NG
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
Check the A/C system. (Refer to GROUP 55 – On-vehicle Service.)

INSPECTION PROCEDURE 21
Fans (radiator fan, A/C condenser fan) are inoperative. Probable cause
The engine-ECU <M/T> or engine-A/T-ECU <A/T> sends a duty signal to the fan  Malfunction of the fan motor relay
controller according to engine coolant temperature, vehicle speed, or A/C switch  Malfunction of the fan motor
load.  Malfunction of the fan controller
The fan controller controls radiator fan and condenser fan speeds, based on this  Open or short circuit, or poor connector contact
signal. (The closer the terminal voltage comes to 5 V, the higher the fan speed  Malfunction of the engine-ECU <M/T>
becomes.)  Malfunction of the engine-A/T-ECU <A/T>

NG
Measure at engine-ECU connector B-84 <M/T> or engine-A/T-ECU Check the following connectors: A-23, A-32
connector B-84 <A/T>. OK NG
 Disconnect the connector, measure at the harness side.
 Voltage between terminal 18 and earth Repair
(Ignition switch: ON)
OK: 4.8 – 5.2 V (The fan runs at high speed.) Check trouble symptom.
 Earth terminal 18.
(Ignition switch: ON) NG
OK: The fan stops.
Check the harness wire between the engine-ECU <M/T> or engine-
OK A/T-ECU <A/T> and fan controller.
OK NG
Check the following connector: B-84
OK NG Repair

Repair Check the radiator fan and condenser fan circuit. (Refer to GROUP
14 – Troubleshooting.)
Check trouble symptom.
NG
NG
MUT-II Data list Check the engine coolant temperature sensor system. (Refer to
21 Engine coolant temperature sensor P.13A-19, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
OK: After the engine has been warmed up, the engine coolant 0115.)
temperature during idling is identical to the MUT-II reading.
OK
NG
Check the thermostat. Replace
OK

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

13A-88 GDI – Troubleshooting

INSPECTION PROCEDURE 22
Clutch switch system malfunction <M/T> Probable cause
The clutch pedal switch sends a signal indicating clutch pedal depression to the  Malfunction of the clutch switch
engine-ECU. The engine-ECU controls the fuel injection properly according to this  Open circuit or short-circuited harness wire in the
signal, thus prevents the fluctuation of the engine speed during shift change. clutch switch circuit
 Malfunction of the engine-ECU

Check the clutch switch. (Refer to NG

P.13A-109*.) Replace
OK
(1) NG OK
Measure at the clutch switch connector Check the following connectors: Check the trouble symptoms.
B-96. B-19, B-86, B-96 NG
 Disconnect the connector, and NG
measure at the harness side.
(1) Voltage between 2 and earth Check the harness wire between the
Repair engine-ECU and the clutch switch con-
(Ignition switch: ON)
OK: System voltage (2) NG nector.
Check the harness wire between the
(2) Continuity between 1 and earth clutch switch connector and the earth, OK NG
OK: Continuity and repair if necessary.
OK Repair

Check the following connector: Replace the engine-ECU.

B-96
OK NG

Repair

Check the trouble symptoms.

NG

Replace the engine-ECU.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

INSPECTION PROCEDURE 23
GDI ECO indicator lamp does not illuminate. Probable cause
If the GDI ECO indicator lamp does not illuminate after turning switch, the causes  Burned-out GDI ECO indicator lamp bulb
listed in the right column are suspected.  Open circuit or short-circuited harness wire in the
GDI ECO indicator lamp circuit
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

OK
Measure at the engine-ECU connector B-84 <M/T> or engine- Check the following connector: B-84
A/T-ECU connector B-84 <A/T>. OK NG
 Disconnect the connector, and measure at the harness side.
 Earth terminal 14 <M/T>, 23 <A/T> (Ignition switch: ON) Repair
OK: The GDI ECO indicator lamp illuminates.
Check trouble symptom.
NG
NG
Check a burned-out bulb.
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
OK NG

Repair OK
Measure at combination meter B-01. Check the following connectors: B-02, B-19, B-84
 Disconnect the connector, and measure at the harness side. OK NG
 Voltage between terminal 49 and earth (Ignition switch: ON)
OK: System voltage Repair
Check trouble symptom.
NG

Check the GDI ECO indicator lamp circuit, and repair if necessary.
Check the harness wire between the combination meter and en-
gine-ECU<M/T> or engine-A/T-ECU<A/T> and repair if necessary.
 GDI – Troubleshooting 13A-89
INSPECTION PROCEDURE 24
GDI ECO indicator lamp remains illuminated and does Probable cause
not go off.
If the GDI ECO indicator lamp does not go off during high load operation, the causes  Short circuit between the GDI ECO indicator lamp
listed in the right column are suspected. and engine-ECU
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG
Measure at combination meter connector B-02. Check the harness wire between the combination meter and
 Disconnect the connector, and measure at the harness side. engine-ECU <M/T> or engine-A/T-ECU <A/T>, and repair if
 Disconnect the engine-ECU connector B-84 <M/T> or necessary.
engine-A/T-ECU connector B-84 <A/T>.
 Continuity between terminal 11 and earth
OK: No continuity
OK

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

13A-90 GDI – Troubleshooting

INSPECTION PROCEDURE 25
Engine-ECU (engine-A/T-ECU) power supply and earth Probable cause
circuit system
The cause is probably a malfunction of the engine-ECU <M/T> or  Open circuit or short-circuited harness wire in the
engine-A/T-ECU <A/T> or one of the problems listed at right. engine-ECU <M/T>or engine-A/T-ECU <A/T>
power supply circuit
 Open circuit or short-circuited harness wire in the
engine-ECU <M/T> or engine-A/T-ECU <A/T>
earth circuit
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

<M/T>
(1) NG NG
Measure at the engine-ECU connectors Check the following connectors: Repair
B-86, B-87. B-18, B-58
 Disconnect the connector, and
OK
measure at the harness side.
(1) Voltage between 99 and earth NG
Check the trouble symptoms. Check the harness wire between the
(Ignition switch: ON)
engine-ECU and ignition switch, and
OK: System voltage
repair if necessary.
(2) Voltage between 57 and earth
OK: System voltage (2), (3) NG OK NG
(3) Voltage between 47, 59 and Check the harness wire between the
earth (Ignition switch: ON) engine-ECU and engine control relay, Repair
OK: System voltage (When ter- and repair if necessary.
Check the ignition switch. (Refer to
minal 57 is shorted to
GROUP 54.)
earth)
(4) Continuity between 46, 58 and (4) NG
earth Check the harness wire between the
OK: Continuity engine-ECU and earth, and repair if
(5) Voltage between 60 and earth necessary.
OK: System voltage
(5) NG NG
Check the following connectors: Repair
B-18, B-45
OK
NG
Check the trouble symptoms. Check the harness wire between the
engine-ECU and the battery, and repair
if necessary.

OK

Check the following connectors:

B-86, B-87
OK NG

Repair
Check the trouble symptoms.
NG

Replace the engine-ECU.

 GDI – Troubleshooting 13A-91
<A/T>
(1) NG
Measure at the engine-A/T-ECU connector B-85, B-86. Check the following connectors: B-18, B-58
 Disconnect the connector, and measure at the harness side. OK NG
(1) Voltage betwee4n 98 and earth
(Ignition switch: ON) Repair
OK: System voltage
(2) Voltage between 49 and earth Check the trouble symptoms.
OK: System voltage
(3) Voltage between 41, 47 and earth (Ignition switch: ON) NG
OK: System voltage (When terminal 49 is shorted to
earth) Check the harness wire between engine-A/T-ECU and ignition
(4) Continuity between 42, 48 and earth switch.
OK: Continuity OK NG
(5) Voltage between 66 and earth
OK: System voltage Repair

Check the ignitio switch. (Refer to GRUOP 54 – Ignition Switch.)

(2), (3) NG
Check the harness wire between the engine-A/T-ECU and the
engine control relay, and repair if necessary.
(4) NG
Check the harness wire between the engine-A/T-ECU and the
earth, and repair if necessary.

(5) NG
Check the following connectors:: B-18, B-45
OK NG
OK
Repair
Check the following connectors: B-85, B-86
Check the trouble symptoms.
OK NG
NG
Repair
Check the harness wire between the engine-A/T-ECU and the
Check the trouble symptoms. battery, and repair if necessary.
NG

Replace the engine-A/T-ECU.

INSPECTION PROCEDURE 26
Engine control relay and ignition switch-IG system Probable cause
When the ignition switch ON signal is input to the engine-ECU <M/T> or  Malfunction of the ignition switch
engine-A/T-ECU <A/T>, the engine-ECU <M/T> or engine-A/T-ECU <A/T> turns  Malfunction of the engine control relay
on the engine control relay.  Open circuit or short-circuited harness wire of the
This causes system voltage to be supplied to the engine-ECU <M/T> or engine control relay circuit
engine-A/T-ECU <A/T> and to the sensors and actuators.  Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG
Check the engine control relay. (Refer Replace
to P.13A-105*.)
OK
NG
Measure at the engine control relay Check the harness wire between the
connector B-26. battery and the engine control relay,
 Disconnect the connector, and and repair if necessary.
measure at the harness side.
 Voltage between 3, 4 and earth
OK: System voltage
OK

Check the engine-ECU

(engine-A/T-ECU) power supply and
earth circuit system.
(Refer to P.13A-90, INSPECTION
PROCEDURE 25.)

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-92 GDI – Troubleshooting

INSPECTION PROCEDURE 27
Injector driver relay system Probable cause
When the ignition switch ON signal is input to the engine-ECU <M/T> or the  Malfunction of the injector driver relay
engine -A/T-ECU <A/T>, engine-ECU <M/T> or the engine -A/T-ECU <A/T>  Improper connector contact, open circuit or
turns on the injector driver relay. short-circuited harness wire
This causes system voltage to be supplied to the injector driver.  Malfunction of the engine-ECU <M/T> or
engine-A/T-ECU <A/T>

NG
Check the injector driver relay. (Refer to P.13A-105*.) Replace
OK
(1) NG
Measure at the injector driver relay connector A-53. Check the harness wire between the injector driver relay and
 Disconnect the connector, and measure at the harness side. the battery, repair if necessary.
(1) Voltage between 1 and earth
OK: System voltage
(2) Voltage between 3 and earth (Ignition switch: ON) (2) NG
OK: System voltage Check the following connectors: B-18, B-58

OK OK NG
Repair
Check the troble symptoms.
NG

Check the harness wire between the injector driver relay and
the ignition switch, repair if necessary.

NG
Measure at the engine-ECU connector B-84 <M/T> or Check the following connector: A-53
engine-A/T-ECU connector B-86 <A/T>.
OK NG
 Disconnect the connector, and measure at the harness side.
 Voltage between 55 <M/T> , 6<A/T> and earth
(Ignition switch: ON) Repair
OK: System voltage
Check the troble symptoms.
OK
NG
Check the following connectors: B-86 <M/T>, B-84 <A/T>
Check the harness wire between the injector driver relay and
OK NG the engine-ECU <M/T> or the engine-A/T-ECU <A/T>, repair if
necessary.
Repair
NG
Check the troble symptoms. Check the following connector: A-53
NG OK NG

Measure at the injector driver connector A-52. Repair

 Connect the connector.
 Voltage between 12, 21 and earth (Ignition switch: ON) Check the troble symptoms.
OK: System voltage NG
OK
Check the harness wire between the injector driver relay and
Check the injector driver system. the injector driver, repair if necessary.
(Refer to P.13A-56, INSPECTION PROCEDURE FOR
DIAGNOSIS CODE P1200.)

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 GDI – Troubleshooting 13A-93
INSPECTION PROCEDURE 28
Ignition switch-ST system Probable cause
The ignition switch-ST outputs a HIGH signal to the engine-ECU <M/T> or  Malfunction of the ignition switch
engine-A/T-ECU <A/T> while the engine is cranking.  Malfunction of the inhibitor switch <A/T>
The engine-ECU <M/T> or engine-A/T-ECU <A/T> uses this signal to carry out  Open circuit or short-circuited harness wire of the
functions such as fuel injection control during starting. ignition switch circuit
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

<M/T>
NG NG
Measure at the engine-ECU connector Check the following connectors: Repair
B-86. B-18, B-58
 Disconnect the connector, and OK
measure at the harness side.
 Voltage between 68 and earth NG
Check the trouble symptoms. Check the harness wire between the
(Ignition switch: START) engine-ECU and the ignition switch.
OK: 8 V or more
OK NG
OK
NG Repair
Check the following connector: Repair
B-86
Check the ignition switch. (Refer to
OK GROUP 54.)
Check the trouble symptoms.
NG

Replace the engine-ECU.

<A/T>
NG
Check the inhibitor switch. Replace
 Continuity between terminal 9 and 10
(Refer to GROUP 23 – On-vehicle Service)
OK
NG
Check the following connectors: B-18, B-58
Measure at the inhibitor switch connector A-99.
 Disconnect the connector, and measure at the harness side. OK NG
 Voltage between 10 and earth (Ignition switch: START)
OK: System voltage Repair
OK Check the trouble symptoms.
NG

Check the harness wire between the inhibitor switch and the ignition
switch.
OK NG

Repair

Check the ignition switch.

(Refer to GROUP 54 – Ignition Switch.)

NG
Check the following connector: A-99
Measure at the engine-A/T-ECU connector B-85.
 Disconnect the connector, and measure at the harness side. OK NG
 Voltage between 58 and earth
(Selector lever position: P or N) Repair
(Ignition switch: START)
OK: System voltage Check the trouble symptoms.
NG
OK NG

Repair Check the harness wire between the inhibitor switch and the
engine-A/T-ECU, repair if necessary.
Check the following connector: B-85
OK

Check the trouble symptoms.

NG

Replace the engine-A/T-ECU.

13A-94 GDI – Troubleshooting

INSPECTION PROCEDURE 29
Accelerator pedal position switch system Probable cause
The accelerator pedal position switch detects that the accelerator pedal is fully closed,  Maladjustment of the accelerator cable
and sends a signal to the engine-ECU <M/T> or engine-A/T-ECU <A/T>. The  Maladjustment of the accelerator pedal position switch
engine-ECU <M/T> or engine-A/T-ECU <A/T> controls idle speed, based on this  Open circuit or short-circuited harness wire in the
signal. accelerator pedal position switch system, or poor
connector contact
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG
Check the accelerator pedal position switch. (Refer to P.13A-127.) Replace the accelerator pedal position sensor assembly.
OK
NG
Measure at accelerator pedal position sensor connector B-94. Check the following connectors: B-87 <M/T>, B-86 <A/T>
 Disconnect the connector, and measure at the harness side. OK NG
 Voltage between terminal 4 and earth
(Ignition switch: ON) Repair
OK: 4 V or more
 Continuity between terminal 5 and earth
OK: Continuity Check trouble symptom.
OK NG

Check the harness wire between the engine-ECU <M/T> or engine-

A/T-ECU <A/T> and accelerator pedal position sensor.
OK NG
NG
Check the following connector: B-94 Repair Repair
OK
NG
Check trouble symptom. Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-95
INSPECTION PROCEDURE 30
Fuel pump (low pressure) system Probable cause
The engine-ECU <M/T> or engine-A/T-ECU <A/T> turns on the fuel pump relay  Malfunction of the fuel pump relay
while the engine is cranking or running, and supplies power source to the fuel pump  Malfunction of the fuel pump (low pressure)
(low pressure).  Open circuit or short-circuited harness wire in the
fuel pump (low pressure) circuit, or poor connector
contact
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

OK
MUT-II Actuator test Normal
07 Fuel pump (Refer to P.13A-105.)
NG
NG
Check the fuel pump relay. (Refer to Replace
P.13A-105*.)
OK
NG NG
Measure at fuel pump relay connector Check the following connectors: Repair
B-27. B-18, B-58
 Disconnect the connector, and OK
measure at the harness side. NG
 Voltage between terminals 3, 4 and Check trouble symptom. Check the harness wire between the
earth (Ignition switch: ON) fuel pump relay and ignition switch.
OK: System voltage
OK NG
OK
NG Repair
Measure at engine-ECU connector Check the following connector:
B-84 <M/T> or engine-A/T-ECU con- B-27 Check the ignition switch. (Refer to
nector B-84 <A/T>. OK NG GROUP 54 – Ignition Switch.)
 Disconnect the connector, and
measure at the harness side. Repair
 Voltage between terminal 21 and NG
earth (Ignition switch: ON) Check trouble symptom. Check the harness wire between the
OK: System voltage fuel pump relay and engine-ECU <M/T>
or engine-A/T-ECU <A/T>, and repair
OK if necessary.
OK NG
Measure at engine-ECU connector Check the following connector: Repair
B-84 <M/T> or engine-A/T-ECU con- B-84
nector B-84 <A/T>. OK
 Disconnect the connector, and NG
measure at the harness side. Check trouble symptom. Replace the engine-ECU <M/T> or en-
 Short circuit between terminal 21 gine-A/T-ECU <A/T>.
and earth (Ignition switch: ON)
OK: The fuel pump operates (its
operation sound can be
heard).
NG
(1) NG NG
Measure at fuel pump (low pressure) Check the following connectors: Repair
connector D-13. B-18, B-27, D-13
 Disconnect the connector, and OK
measure at the harness side. NG
(1) Voltage between terminal 5 and Check trouble symptom. Check the harness wire between the
earth (Ignition switch: ON) fuel pump relay and fuel pump (low
OK: System voltage (2) NG pressure), and repair if necessary.
(2) Continuity between 4 and earth Check the following connector:
OK: Continuity D-15
OK NG
OK
Repair
NG
Check trouble symptom. Check the harness wire between the
NG fuel pump (low pressure) and earth,
Check the following connector: Repair and repair if necessary.
D-13
OK

Check trouble symptom.

NG

Replace the fuel pump (low pressure).

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13A-96 GDI – Troubleshooting

INSPECTION PROCEDURE 31
Power steering fluid pressure switch system Probable cause
The power steering fluid pressure switch sends a signal to the engine-ECU <M/T>  Malfunction of the power steering fluid pressure switch
or engine-A/T-ECU <A/T> according to power steering load.  Open circuit or short-circuited harness wire in the
Based on this signal, the engine-ECU <M/T> or engine-A/T-ECU <A/T> controls power steering fluid pressure switch circuit, or poor
the throttle control servo so that idle speed increases when the power steering is connector contact
in operation.  Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG
Check the power steering fluid pressure switch. (Refer to GROUP Replace
37A – On-vehicle Service.)
OK
NG
Measure at power steering fluid pressure switch connector A-38. Check the following connector: B-86 <M/T>, B-85 <A/T>
 Disconnect the connector, and measure at the harness side. OK NG
 Voltage between terminal 1 and earth
(Ignition switch: ON) Repair
OK: System voltage
OK Check trouble symptom.
NG
Check the following connector: A-38
OK NG Check the harness wire between the engine-ECU <M/T> or engine-
A/T-ECU <A/T> and power steering fluid pressure switch.
OK NG
Repair
Repair
NG
Check trouble symptom. Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

INSPECTION PROCEDURE 32
A/C switch and A/C relay system Probable cause
If the engine-ECU receives a ‘A/C on’ signal, it operates the throttle control servo  Malfunction of the A/C control system
and A/C compressor magnetic clutch so that idle speed increases.  Malfunction of the A/C switch
 Open circuit or short-circuited harness wire in the
A/C switch circuit, or poor connector contact
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG
Service the A/C compressor relay. (Refer to GROUP 55 – On-ve- Replace
hicle Service.)
OK
OK
Measure at engine-ECU connectors B-84, B-87 <M/T> or Check the following connectors:
engine-A/T-ECU connectors B-84, B-86 <A/T>. B-84, B-87 <M/T>, B-84, B-86 <A/T>
 Disconnect the connector, and measure at the harness side. OK NG
 Voltage between terminals 20, 83 and earth
(Ignition switch: ON)
OK: 0 – 3 V Repair
(A/C switch: OFF)
System voltage
Check trouble symptom.
(A/C switch: ON)
 Connect terminal 20 to earth. NG
(Ignition switch: ON, A/C switch: ON)
OK: A/C compressor clutch turns on. Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
NG

Check the A/C system. (Refer to GROUP 55 – On-vehicle Service.)

 GDI – Troubleshooting 13A-97
INSPECTION PROCEDURE 33
M/T oil temperature sensor system Probable cause
This sensor inputs the manual transmission oil temperature to the engine-ECU.  Malfunction of the M/T oil temperature sensor
The engine-ECU uses this input to control the idle speed control servo so that  Open circuit or short-circuited harness wire in the
the idle speed is increased when the manual transmission oil temperature M/T oil temperature sensor circuit
becomes low.  Malfunction of the engine-ECU

NG
Check the M/T oil temperature sensor. (Refer to GROUP 22 – Replace
On-vehicle Service.)
OK
NG
Measure at the M/T oil temperature sensor connector A-80. Check the following connector: B-87
 Disconnect the connector, and measure at the harness OK NG
side.
 Voltage between 1 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 2 and earth
OK: Continuity
Check trouble symptom.
OK
NG
Check the following connector: A-80
Check the harness wire between the engine-ECU and the M/T
OK NG oil temperature sensor.

Repair OK NG

Repair

NG
Check the trouble symptoms. Replace the engine-ECU.
13A-98 GDI – Troubleshooting <M/T>

INSPECTION PROCEDURE 34
Stop lamp switch system Probable cause
The engine-ECU <M/T> or engine-A/T-ECU <A/T> determines whether the brake  Malfunction of the stop lamp switch
pedal is depressed or not, by means of the stop lamp switch input signal.  Open circuit or short-circuited harness wire in the
stop lamp circuit, or poor connector contact
 Malfunction of the engine-ECU <M/T>
 Malfunction of the engine-A/T-ECU <A/T>

NG
Check the stop lamp switch. (Refer to GROUP 35 – Brake Pedal.) Replace
OK
NG
Measure at stop lamp switch connector B-39. Check the following connector: B-43
 Disconnect the connector, and measure at the harness side. NG
OK
 Voltage between terminal 3 and earth
OK: System voltage Repair
OK
Check trouble symptom.
NG

Check the harness wire between the battery and stop lamp switch.
NG
Measure at engine-ECU connector B-86 <M/T> or engine-A/T-ECU Check the following connectors: B-19, B-61X, B-39
connector B-87 <A/T>. OK NG
 Disconnect the connector, and measure at the harness side.
 Voltage between terminal 63 <M/T>, 123 <A/T> and earth Repair
(Ignition switch: ON)
OK: 0 – 3 V (when the brake pedal is not depressed) Check trouble symptom.
System voltage (when the brake pedal is depressed)
NG
OK
Check the harness wire between the engine-ECU <M/T> or engine-
A/T-ECU <A/T> and stop lamp, and repair if necessary.
NG
Check the following connector: B-86 <M/T>, B-87 <A/T> Repair
OK

Check trouble symptom.

NG

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

INSPECTION PROCEDURE 35
Small lamp switch system Probable cause
The engine-ECU <M/T> or engine-A/T-ECU <A/T> determines whether the  Improper connector contact, open circuit or
small lamp switch is on or off. According to that information, the engine-ECU short-circuited harness wire in the taillamp circuit
<M/T> or engine-A/T-ECU <A/T> controls alternator output current when the  Malfunction of the engine-ECU <M/T>
vehicle is started.  Malfunction of the engine-A/T-ECU <A/T>

NG
Measure at the engine-ECU connector B-87 <M/T> or Check the taillamp circuit. (Refer to ELECTRICAL WIRING.)
engine-A/T-ECU connector B-86 <A/T>.
 Disconnect the connector, and measure at the harness
side.
 Voltage between 88 <M/T>, 86 <A/T> and earth
(Lighting switch: ON)
OK: System voltage
OK
NG
Check the following connectors: B-87 <M/T>, B-86 <A/T> Repair
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

 GDI – Troubleshooting 13A-99
DATA LIST REFERENCE TABLE
Caution
When shifting the select lever to D range, the brakes should be applied so that the vehicle does
not move forward.
NOTE
*1: Within four minutes after starting the engine
*2: In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10 %
longer than the standard time.
*3: The accelerator pedal position switch normally turns off when the voltage of the accelerator pedal
position sensor (1st channel) is 200 – 600 mV higher than the voltage at the idle position. If the accelerator
pedal position switch turns back on after the accelerator pedal position sensor voltage has risen by
100 mV and the throttle valve has opened, the accelerator pedal position switch and the accelerator
pedal position sensor (1st channel) need to be adjusted.
Item Check items Requirements Normal condition Inspection Reference
No. procedure page
No.

11 Oxygen sensor Engine: After Idling 200 mV or less*1 Code No. 13A-26
(front) warm-up P0130
Sudden racing 600 – 1,000 mV

2,500 r/min 400 mV or less and

600 – 1,000 mV
alternates.

12 Air flow sensor  Engine coolant Idling 27 – 53 Hz Code No. 13A-14

temperature: P0100
80 – 95C
 Lamps, electric 2,500 r/min 55 – 95 Hz
cooling fan and
all accessories:
OFF Racing Frequency in-
 Transmission: creases in re-
Neutral sponse to racing.
(A/T: P range)

13 Intake air tem- Ignition switch: ON Intake air tempera- –20C Code No. 13A-18
perature sen- ture: –20C P0110
sor
Intake air tempera- 0C
ture: 0C

Intake air tempera- 20C

ture: 20C

Intake air tempera- 40C

ture: 40C

Intake air tempera- 80C

ture: 80C
13A-100 GDI – Troubleshooting

Item Check items Requirements Normal condition Inspection Reference

No. procedure page
No.

14 Throttle posi-  Engine coolant Release the accel- 4,500 – 5,500 Code No. 13A-44
tion sensor temperature: erator pedal. P0225
(2nd channel) 80 – 95C
 Ignition switch: Depress the accel- Voltage decreases
ON (Engine erator pedal gradu- in response to the
stopped) ally. pedal depression.

Depress the accel- 400 – 600 mV

erator pedal fully.

16 Power supply Ignition switch: ON System voltage Procedure 13A-90

voltage No. 25

18 Cranking sig- Transmission: Engine: Stopped OFF Procedure 13A-93

nal (Ignition Neutral No 28
No.
switch – ST) (A/T: P range) Engine: Cranking ON

21 Engine coolant Ignition switch: ON Engine coolant –20C Code No. 13A-19
temperature temperature: P0115
sensor –20C

Engine coolant 0C

temperature: 0C

Engine coolant 20C

temperature: 20C

Engine coolant 40C

temperature: 40C

Engine coolant 80C

temperature: 80C

22 Crank angle  Engine: Crank- Compare the engine Accord Code No. 13A-48
sensor ing speed readings on P0335
 Tachometer: the tachometer and
Connected the MUT-II.

 Engine: Idling Engine coolant 1,200 – 1,400 r/min

 Accelerator temperature:
pedal position –20C
switch: ON
Engine coolant 1,100 – 1,300 r/min
temperature: 0C

Engine coolant 1,000 – 1,200 r/min

temperature: 20C

Engine coolant 800 – 1,000 r/min

temperature: 40C

Engine coolant 550 – 650 <M/T>

temperature: 80C r/min*1
600 – 700 <A/T>
r/min*1

24 Vehicle speed Drive at 40 km/h Approximately Code No. 13A-56

sensor 40 km/h P0500
 GDI – Troubleshooting 13A-101

Item Check items Requirements Normal condition Inspection Reference

No. procedure page
No.

25 Barometric Ignition switch: ON Altitude: 0 m 101 kPa Code No. 13A-16

pressure sen- P0105
sor Altitude: 600 m 95 kPa

Altitude: 1,200 m 88 kPa

Altitude: 1,800 m 81 kPa

26 Accelerator Ignition switch: ON Release the accel- ON Procedure 13A-94

pedal position (Depress and re- erator pedal. No. 29
switch lease the accelera-
tor pedal several Depress the accel- OFF
times) erator pedal slight-
ly.

27 Power steering Engine: Idling Steering wheel sta- OFF Procedure 13A-96
fluid pressure tionary No. 31
switch
Steering wheel ON
turning

28 A/C switch Engine: Idling (The A/C switch: OFF OFF Procedure 13A-96
compressor
A/C com ressor is No. 32
running when the
A/C switch: ON ON
A/C switch is on.)

31 Small lamp Engine: Idling Lighting switch: OFF Procedure 13A-98

switch OFF No. 35

Lighting switch: ON ON

34 Air flow sensor Engine: After hav- Engine is idling ON Code No. 13A-14
reset signal ing warmed up P0100
3,000 r/min OFF

37 Volumetric effi-  Engine coolant Engine is idling 15 – 35 % – –

ciency temperature:
80 – 95C
 Lamps, electric 2,500 r/min 15 – 35 %
cooling fan and
all accessories:
OFF Engine is suddenly Volumetric effi-
 Transmission: raced ciency increases in
Neutral response to racing
(A/T: P range)

38 Crank angle  Engine: Cranking [reading is possible Engine speeds dis- – –

sensor at 2,000 r/min or less] played on the
 Tachometer: Connected MUT-II and
tachometer are
identical.
13A-102 GDI – Troubleshooting

Item Check items Requirements Normal condition Inspection Reference

No. procedure page
No.

41 Injector drive  Engine coolant Idling 0.5 – 0.7 ms*1 – –

time*2 temperature:
80 – 95C
 L l ti
Lamps, electric
cooling fan and 2,500 r/min 0.6 – 0.8 ms
all accessories:
OFF
 Transmission: Sudden racing Increases
Neutral
(A/T: P range)

44 Ignition  Engine: After Idling 12 – 20BTDC*1 Code No. 13A-45

advance warm-up
warm u P0300
 Set a timing
2,500 r/min 20 – 40BTDC
light.

48 M/T oil temper- Drive after the en- Drive for 15 min- Gradually Procedure 13A-97
ature sensor gine has warmed utes or more increases to No. 33
up. 50 – 90C

49 A/C relay Engine: After A/C switch: OFF OFF (compressor Procedure 13A-96
warm-up, idling clutch is not oper- No. 32
ating)

A/C switch: ON ON (compressor

clutch is operating)

59 Oxygen sensor  Transmission: 3,500 r/min 600 – 1,000 mV Code No. 13A-29
(rear) 2nd gear P0136
(A/T: L range)
 Drive with
throttle widely
open

66 Brake vacuum  Engine coolant Stop the engine Displayed pres- Code No. 13A-65
sensor temperature: from idling speed, sure increases. P1515
80 – 95C and then depress
 Lamps, electric the brake pedal
cooling fan and several times with
all accessories: the ignition switch
OFF on.
 Transmission:
Neutral
(A/T: P range)

67 Stop lamp Ignition switch: ON Brake pedal: De- OFF Procedure 13A-98
switch pressed No. 34

Brake pedal: Re- ON

leased

68 EGR valve  Engine coolant Idling 2 – 20 STEP Code No. 13A-52

temperature: P0403
80 – 95C
 Lamps, electric
cooling fan and
all accessories:
2,500 r/min 0 – 10 STEP
OFF
 Transmission:
Neutral
(A/T: P range)
 GDI – Troubleshooting 13A-103

Item Check items Requirements Normal condition Inspection Reference

No. procedure page
No.

74 Fuel pressure  Engine coolant Engine: Idling 4 – 6.9 MPa Code No. 13A-34
sensor temperature: P0190
80 – 95C
 Lamps, electric
cooling fan and
all accessories:
OFF
 Transmission:
Neutral
(A/T: P range)

77 Accelerator Ignition switch: ON Release the accel- 985 – 1,085 mV Code No. 13A-61
pedal position erator pedal. P1225
sensor (2nd
channel)*3 Depress the accel- Increases in re-
erator pedal gradu- sponse to the ped-
ally. al depression
stroke.

Depress the accel- 4,000 mV or more

erator pedal fully.

78 Accelerator Ignition switch: ON Release the accel- 985 – 1,085 mV Code No. 13A-41
pedal position erator pedal. P0220
sensor
(1st channel)*3 Depress the accel- Increases in re-
erator pedal gradu- sponse to pedal
ally. depression stroke.

Depress the accel- 4,000 mV or more

erator pedal fully.

79 Throttle posi-  Engine coolant Release the accel- 450 – 800 mV Code No. 13A-22
tion sensor (1st temperature: erator pedal. P0120
channel) 80 – 95C
 Ignition switch: Depress the accel- Increases in re-
ON (Engine erator pedal gradu- sponse to pedal
stopped) ally. depression stroke.

Depress the accel- 4,200 – 4,900 mV

erator pedal fully.

Engine: After No load 450 – 1,000 mV

warm-up,
warm-up idling
A/C switch: OFF → Increases by 100 –
ON 600 mV.

81 Long-term fuel Engine: Warm, 2,500 r/min without any –12.5 – 12.5 % Code No. 13A-32
compensation load (during closed loop) P0170

82 Short-term fuel Engine: Warm, 2,500 r/min without any –30 – 25 % Code No. 13A-32
compensation load (during closed loop) P0170
13A-104 GDI – Troubleshooting

Item Check items Requirements Normal condition Inspection Reference

No. procedure page
No.

85 Fuel pressure  Engine coolant Engine: Idling 4,000 – 6,900 kPa – –

sensor temperature:
80 – 95C
 Lamps, electric
cooling fan and
all accessories:
OFF
 Transmission:
Neutral
(A/T: P range)

87 Calculation Engine: Warm Engine: Idling 15 – 35 % – –

load value
2,500 r/min 15 – 35 %

88 Fuel control Engine: Warm 2,500 r/min Closed loop Code No. 13A-24
condition P0125
When engine is Open loop – drive
suddenly raced condition

99 Fuel injection Engine: After warm Idling (after four Lean compression – –
mode up minutes or more
have passed since
engine start)

2,500 r/min Stoichiometric

metric feedback

Sudden racing after Open loop

idle position

A1 Oxygen sensor Engine: Idling 0V Code No. 13A-26

(front) After warm-up P0130
Sudden racing 0.6 – 1.0 V

2,500 r/min 0.4 V or less and

0.6 – 1.0 V alter-
nates

A2 Oxygen sensor  Transmission: 3,500 r/min 0.6 – 1.0 V Code No. 13A-29
(rear) 2nd gear P0136
<M/T>, L range
<A/T>
 Drive with
throttle widely
open

8A Throttle posi-  Engine coolant Release the accel- 8 – 16 % Code No. 13A-22
tion sensor (1st temperature: erator pedal. P0120
channel) 80 – 95C
(Throttle valve  Ignition switch: Depress the accel- Increase in re-
opening angle) ON (Engine: erator pedal gradu- sponse to pedal
stopped) ally. depression stroke.

Depress the accel- 80 – 100 %

erator pedal fully.

Engine: After No load 8 – 18 %

warm-up,
warm-up idling
A/C switch: Rises by 2 – 10 %
OFF → ON
 GDI – Troubleshooting 13A-105
ACTUATOR TEST REFERENCE TABLE
Item Inspection Drive contents Inspection contents Normal condition Inspection Reference
No. item procedure page
No.

01 Injectors Cut fuel to No. 1 Engine: Idling condition Code No. 13A-35
injector After having becomes different P0201
warmed up/Engine (becomes unsta
unsta-
02 Cut fuel to No. 2 is idling ble). Code No. 13A-37
injector ((Cut the fuel supplyy P0202
t each
to h iinjector
j t iin
03 Cut fuel to No. 3 turn and check Code No. 13A-38
injector cylinders
y which P0203
d ’ affect
don’t ff idling.)
idli )
04 Cut fuel to No. 4 Code No. 13A-39
injector P0204

07 Fuel pump Fuel pump Ignition switch: ON Sound of opera- Procedure 13A-95
(low pressure) operates and tion is heard. No. 30
fuel is recirculated.

08 Purge Solenoid valve Ignition switch: ON Sound of opera- Code No. 13A-55
control turns from OFF to tion can be heard P0443
solenoid valve ON. when solenoid
valve is
driven.

17 Basic ignition Set the engine- Idling after engine 5BTDC – –

timing ECU <M/T> or warm up
engine-A/T-ECU
<A/T> to ignition
timing adjustment
mode

21 Fan controller Drive the fan motor Ignition switch: ON The fan motor Procedure 13A-87
operates No. 21

34 Electronic- Stop the throttle Ignition switch: ON Throttle valve is Code No. 13A-57
controlled control servo. opened slightly. P1220
throttle valve
system
13A-106 GDI – Troubleshooting

CHECK AT THE ENGINE-ECU TERMINALS <M/T>

TERMINAL VOLTAGE CHECK CHART
Engine-ECU Connector Terminal Arrangement

Terminal No. Check item Check requirements (engine condition) Normal condition

1 No. 1 injector Engine: Warm up, and then depress Decreases slightly for short
the accelerator pedal suddenly from time from 9 – 13 V
9 No. 2 injector the idle speed.

24 No. 3 injector

2 No. 4 injector

3 No. 1 ignition coil Engine: 3,000 r/min 0.3 – 3.0 V

13 No. 2 ignition coil

12 No. 3 ignition coil

4 No. 4 ignition coil

5 EGR valve (D) Ignition switch: Immediately after 5 – 8 V (fluctuates for

turning ON approx.
approx three seconds)
6 EGR valve (C)

32 EGR valve (B)

34 EGR valve (A)

8 Alternator G terminal  Engine: Warm up, and then idling Voltage increases by
 Radiator fan: Not operating 0.2 – 3.5 V
 Headlamp: OFF → ON
 Stop lamp: OFF → ON
 Rear defogger switch: OFF → ON

14 GDI ECO indication lamp Ignition switch: OFF → ON 0 – 3 V (System voltage

after five seconds)

Engine: When the accelerator pedal is System voltage

suddenly depressed while the engine
is idling

16 Purge control solenoid  Engine cool- Engine: Stopped System voltage

valve ant tempera-
ture: Engine: Start the Voltage decreases
80 – 95C engine, and then
 Ignition increase engine
switch: ON speed up to 3,500
r/min.
 GDI – Troubleshooting 13A-107

Terminal No. Check item Check requirements (engine condition) Normal condition

18 Fan controller Radiator and condenser fans are not 0 – 0.3 V

operating.

Radiator and condenser fans are 0.7 V or more

operating.

20 A/C relay  Engine: Idling System voltage, or changes

 A/C switch: OFF → ON from momentarily 6 V or
(Compressor is operating) more to 0 → 3 V

21 Fuel pump relay Ignition switch: Engine: Stopped System voltage

ON
Engine: Idling 0–3V

31 Engine warning lamp Ignition switch: OFF → ON 0 – 3 V → System voltage

(after several seconds)

41 Sensor power supply Ignition switch: ON 4.5 – 5.5 V

42 Power supply to Ignition switch: ON 4.5 – 5.5 V

accelerator pedal position
sensor (1st channel)

43 Crank angle sensor Engine: Cranking 0.4 – 4.0 V

Engine: Idling 1.5 – 2.5 V

44 Engine coolant tempera- Ignition switch: Engine coolant 3.2 – 3.5 V

ture sensor ON temperature: 0C

Engine coolant 2.3 – 2.9 V

temperature:
20C

Engine coolant 1.5 – 2.1 V

temperature:
40C

Engine coolant 0.4 – 1.0 V

temperature:
80C

45 Engine ignition signal Engine: 3,000 r/min 0.3 – 3.0 V

47 Power supply Ignition switch: ON System voltage

59

50 Camshaft position sensor Engine: Cranking 0.4 – 3.0 V

Engine: Idling 0.5 – 2.0 V

51 Barometric pressure Ignition switch: Altitude: 0 m 3.7 – 4.3 V

sensor ON
Altitude: 1,200 m 3.2 – 3.8 V

52 Alternator FR terminal  Engine: Warm up, and then idling Voltage decreases
 Radiator fan: Not operating
 Headlamp: OFF → ON
 Stop lamp: OFF → ON
 Rear defogger: OFF → ON
13A-108 GDI – Troubleshooting

Terminal No. Check item Check requirements (engine condition) Normal condition

53 Oxygen sensor (rear)  Transmission: 2nd gear 0.6 – 1.0 V

 Engine speed: 3,500 r/min or more
 Driving with the throttle valve widely
open

54 Power steering fluid Engine: Warm Steering wheel System voltage

pressure switch up, and then stationary
idling
Steering wheel 0–3V
turning

55 Injector driver relay Ignition switch: OFF 0 – 0.1 V

Ignition switch: ON 0.5 – 1.0 V

56 Throttle valve control Ignition switch: OFF 0 – 0.3 V

servo relay
Ignition switch: ON 0.5 – 1.0 V

57 Engine control relay Ignition switch: OFF 0–3V

Ignition switch: ON System voltage

60 Back-up power source Ignition switch: OFF System voltage

61 Air flow sensor Engine: Idling 2.2 – 3.2 V

Engine: 2,500 r/min

62 Intake air temperature Ignition switch: Intake air temper- 3.2 – 3.8 V
sensor ON ature: 0C

Intake air temper- 2.3 – 2.9 V

ature: 20C

Intake air temper- 1.5 – 2.1 V

ature: 40C

Intake air temper- 0.4 – 1.0 V

ature: 80C

63 Stop lamp switch Depress the brake pedal. System voltage

Release the brake pedal. 0–3V

65 A/C switch (2nd channel) Refer to GROUP 55 – Troubleshooting “Check at the A/C-ECU
terminal, engine-ECU output terminals.”

66 Clutch switch Depress the clutch pedal. 0–3V

Release the clutch pedal. System voltage

68 Ignition switch-ST Engine: Cranking 8 V or more

71 Oxygen sensor (front) Engine: Warm up, and then hold the 0 ↔ 0.8 V alternates.
engine speed at 2,500 r/min (Use a
digital voltmeter).

73 M/T oil temperature M/T oil temperature: 25C 2.4 – 2.7 V

sensor
M/T oil temperature: 80C 0.5 – 0.8 V
 GDI – Troubleshooting 13A-109

Terminal No. Check item Check requirements (engine condition) Normal condition

74 Brake vacuum sensor Engine: Stop the engine from idle Voltage increases
speed, turn the ignition switch ON,
and then depress the brake pedal
several times.

76 Air flow sensor reset Engine: Idling 0–1V

signal
Engine: 3,000 r/min 6–9V

78 Throttle position sensor Ignition switch: Release the 4.5 – 5.5 V

(2nd channel) ON accelerator pedal.

Depress the 0.4 – 0.6 V

accelerator pedal
fully.

79 Accelerator pedal position Ignition switch: Release the 0–1V

switch ON accelerator pedal.

Depress the 4 V or more

accelerator pedal
fully.

80 Vehicle speed sensor  Ignition switch: ON 0 ↔ system voltage

 Move the vehicle forward. alternates.

83 A/C switch (1st channel) Engine: Idling A/C switch: OFF 0–3V

A/C switch: ON System voltage

(Compressor is
operating)

88 Small lamp switch Lighting switch: OFF 0–3V

Lighting switch: ON (Taillamp: ON) System voltage

89 Oxygen sensor heater Engine: Idling 0–3V

(front)
Engine: 3,500 r/min System voltage

90 Oxygen sensor heater Engine: Idling 0–3V

(rear)
Engine: 3,500 r/min System voltage

92 Fuel pressure sensor Engine: Idling 0.3 – 4.7 V

94 Accelerator pedal position Ignition switch: Release the acceler- 0.985 – 1.085 V*1
sensor (1st channel) ON ator pedal.

Depress the 4 V or more*2

accelerator pedal
fully.

96 Injector open circuit check Engine: Increase engine speed from Decreases slightly (approx.
signal idle speed to 4,000 r/min. 0.7 V) from 4.5 V – 5.0 V.

99 Ignition switch-IG Ignition switch: ON System voltage

NOTE
Check if the difference in output between *1 and *2 is 4 V or more.
13A-110 GDI – Troubleshooting

CHECK CHART FOR RESISTANCE AND CONTINUITY

BETWEEN TERMINALS
1. Turn the ignition switch to OFF.
2. Disconnect the engine-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-ECU harness-side connector
while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-ECU and/or ohmmeter.
Be careful to prevent this!
4. If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5. After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.
 GDI – Troubleshooting 13A-111
Engine-ECU Harness Side Connector Terminal Arrangement

Terminal No. Check item Standard value, normal condition (check require-
ments)

5 – 47 EGR valve (D) 15 – 20 Ω (at 20C)

6 – 47 EGR valve (C)

32 – 47 EGR valve (B)

34 – 47 EGR valve (A)

16 – 47 Purge control solenoid valve 36 – 44 Ω (at 20C)

44 – 72 Engine coolant temperature sensor 5.1 – 6.5 kΩ (when engine coolant temperature is
0C)

2.1 – 2.7 kΩ (when engine coolant temperature is

20C)

0.9 – 1.3 kΩ (when engine coolant temperature is

40C)

0.26 – 0.36 kΩ (when engine coolant temperature is

80C)

46 – Body earth Earth Continuity (0 Ω)

58 – Body earth

62 – 72 Intake air temperature sensor 5.3 – 6.7 kΩ (when intake air temperature is 0C)

2.3 – 3.0 kΩ (when intake air temperature is 20C)

1.0 – 1.5 kΩ (when intake air temperature is 40C)

0.30 – 0.42 kΩ (when intake air temperature is 80C)

79 – 49 Accelerator pedal position switch Continuity (when the accelerator pedal is released)

No continuity (when the accelerator pedal is slightly

depressed)

89 – 47 Oxygen sensor heater control (front) 4.5 – 8.0 Ω (at 20C)

90 – 47 Oxygen sensor heater (rear) 11 – 18 Ω (at 20C)

13A-112 GDI – Troubleshooting

CHECK AT THE ENGINE-A/T-ECU TERMINALS <A/T>

TERMINAL VOLTAGE CHECK CHART
Engine-A/T-ECU Connector Terminal Arrangement

Terminal Check item Check condition (Engine condition) Normal condition

No.

1 No. 1 injector While engine is idling after having warmed up, From 9 – 13 V, momen-
suddenly depress the accelerator pedal.
pedal tarily drops slightly
9 No. 2 injector

24 No. 3 injector

2 No. 4 injector

3 Oxygen sensor heater Engine: Idling 0–3V

(front)
Engine: 3,500 r/min System voltage

6 Injector driver relay Ignition switch: OFF 0 – 0.1 V

Ignition switch: ON 0.5 – 1.0 V

8 Alternator G terminal  Engine: Idling after warming-up The voltage increases

 Radiator fan: Not operating by 0.2 – 3.5 V
 Headlamp: OFF to ON
 Stop lamp: OFF to ON
 Defogger switch: OFF to ON

54 Alternator FR terminal  Engine: Idling after warming-up The voltage drops

 Radiator fan: Not operating
 Headlamp: OFF to ON
 Stop lamp: OFF to ON
 Defogger switch: OFF to ON

11 No. 1 ignition coil Engine speed: 3,000 r/min 0.3 – 3.0 V

12 No. 2 ignition coil

31 No. 3 ignition coil

30 No. 4 ignition coil

14 Throttle control servo Ignition switch: OFF 0 – 0.1 V

relay
Ignition switch: ON 0.5 – 1.0 V

18 Fan controller Condenser fan not operating System voltage

Condenser fan operating 0 – 3 V or more

19 Air flow sensor reset Engine: Idling 0–1V

signal
Engine speed: 3,000 r/min 6–9V
 GDI – Troubleshooting 13A-113

Terminal Check item Check condition (Engine condition) Normal condition

No.

20 A/C relay  Engine: Idling System voltage or

 A/C switch: OFF to ON (Compressor operating) changes momentarily 6
V or more to 0 – 3 V

21 Fuel pump relay Ignition switch: ON System voltage

Engine: Idling 0–3V

22 Engine warning lamp Ignition switch: OFF to ON System voltage

23 GDI ECO indication Ignition switch: OFF → ON 0 – 3 V (System voltage

lamp after five seconds)

Rev the engine suddenly. System voltage

26 Oxygen sensor heater Engine: Idling 0–3V

(rear)
Engine: 3,500 r/min System voltage

34 Purge control solenoid  Engine coolant Engine: Stopped System voltage

valve temperature:
80 – 95C Engine: After starting, in- The voltage drops
 Ignition switch: crease the engine speed
ON up to 3,500 r/min

41 Power supply Ignition switch: ON System voltage

47

43 Engine ignition signal Engine speed: 3,000 r/min 0.3 – 3.0 V

44 Engine coolant temper- Ignition switch: ON When engine coolant tem- 3.2 – 3.8 V
ature sensor perature is 0C

When engine coolant tem- 2.3 – 2.9 V

perature is 20C

When engine coolant tem- 1.3 – 1.9 V

perature is 40C

When engine coolant tem- 0.3 – 0.9 V

perature is 80C

45 Crank angle sensor Engine: Cranking 0.4 – 4.0 V

Engine: Idling 1.5 – 2.5 V

46 Power supply voltage Ignition switch: ON 4.5 – 5.5 V

applied to accelerator
pedal position sensor
(1st channel)

49 Engine control relay Ignition switch: OFF 0–3V

Ignition switch: ON System voltage

51 EGR valve (A) Ignition switch: OFF to ON 5–8V

(Repeatedly changes for
53 EGR valve (C) approx. 3 seconds)

60 EGR valve (B)

62 EGR valve (D)

13A-114 GDI – Troubleshooting

Terminal Check item Check condition (Engine condition) Normal condition

No.

52 Power steering fluid Engine: Idling after When steering wheel is System voltage
pressure switch warming-up stationary

When steering wheel is 0–3V

turned

55 Barometric pressure Ignition switch: ON At an altitude of 0 m 3.7 – 4.3 V

sensor
At an altitude of 1,200 m 3.2 – 3.8 V

56 Camshaft position sen- Engine: Cranking 0.4 – 3.0 V

sor
Engine: Idling 0.5 – 2.0 V

58 Ignition switch-ST Engine: Cranking 8 V or more

61 A/C switch 2 Refer to GROUP 55 – Troubleshooting (Check at A/C-ECU or Engine-ECU

Terminal).

63 Injector open circuit Engine: Increases from idling up to 4,000 r/min The voltage decreases
check signal slightly (approx. 0.7 V)
from 4.5 – 5.0 V.

64 Intake air temperature Ignition switch: ON When intake air tempera- 3.2 – 3.8 V
sensor ture is 0C

When intake air tempera- 2.3 – 2.9 V

ture is 20C

When intake air tempera- 1.5 – 2.1 V

ture is 40C

When intake air tempera- 0.4 – 1.0 V

ture is 80C

65 Air flow sensor Engine: Idling 2.2 – 3.2 V

Engine speed: 2,500 r/min

66 Backup power supply Ignition switch: OFF System voltage

71 Oxygen sensor (front) Engine: Running at 2,500 r/min after warming-up Voltages of 0 V and 0.8 V
(Check by using a digital voltmeter.) alternate

73 Oxygen sensor (rear)  Transmission: L range 0.6 – 1.0 V

 Engine speed: 3,500 r/min or more
 Driving with the throttle valve widely open

78 Throttle position sen- Ignition switch: ON Release the accelerator 4.5 – 5.5 V
sor (2nd channel) pedal.

Depress the accelerator 0.4 – 0.6 V

pedal fully.

79 Accelerator pedal posi- Ignition switch: ON Release the accelerator 0–1V

tion switch pedal.

Depress the accelerator 4 V or more

pedal slightly.

80 Vehicle speed sensor  Ignition switch: ON Voltages of 0 and 8 –12

 Move the vehicle slowly forward V alternate (changes
repeatedly)
 GDI – Troubleshooting 13A-115

Terminal Check item Check condition (Engine condition) Normal condition

No.

83 A/C switch 1 Engine: Idling A/C switch: OFF 0–3V

A/C switch: ON (Compres- System voltage

sor is operating)

86 Small lamp switch Lighting switch: OFF 0–3V

Lighting switch: Tail light position System voltage

87 Sensor applied voltage Ignition switch: ON 4.5 – 5.5 V

93 Fuel pressure sensor Engine: Idling 0.3 – 4.7 V

95 Accelerator pedal posi- Ignition switch: ON Release the accelerator 0.985 – 1.085 V
tion sensor (1st chan- pedal.
nel)
Depress the accelerator 4.0 V or higher
pedal fully.

96 Brake vacuum sensor Engine: Stop the engine from idle speed, turn the Voltage increases
ignition switch ON, and then depress the brake
pedal several times.

98 Ignition switch-IG Ignition switch: ON System voltage

123 Stop lamp switch Depress the brake pedal. System voltage

Release the brake pedal. 0–3V

CHECK CHART FOR RESISTANCE AND CONTINUITY

BETWEEN TERMINALS
1. Turn the ignition switch to OFF.
2. Disconnect the engine-A/T-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-A/T-ECU harness-side
connector while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-A/T-ECU and/or ohmmeter.
Be careful to prevent this!
4. If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5. After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.
13A-116 GDI – Troubleshooting

Engine-A/T-ECU Harness Side Connector Terminal Arrangement

Terminal No. Check item Standard value, normal condition (check conditions)

3 – 41 Oxygen sensor heater (front) 4.5 – 8.0 Ω (at 20C)

26 – 41 Oxygen sensor heater (rear) 11 – 18 Ω (at 20C)

34 – 41 Purge control solenoid valve 28 – 36 Ω (at 20C)

Between terminal Earth Continuity (0 Ω)

42 and body earth

Between terminal
48 and body earth

51 – 41 EGR valve (A) 15 – 20 Ω (at 20C)

53 – 41 EGR valve (C)

60 – 41 EGR valve (B)

62 – 41 EGR valve (D)

44 – 81 Engine coolant temperature sensor 5.1 – 6.5 kΩ (When coolant temperature is 0C)

2.1 – 2.7 kΩ (When coolant temperature is 20C)

0.9 – 1.3 kΩ (When coolant temperature is 40C)

0.26 – 0.36 kΩ (When coolant temperature is 80C)

64 – 81 Intake air temperature sensor 5.3 – 6.7 kΩ (When intake air temperature is 0C)

2.3 – 3.0 kΩ (When intake air temperature is 20C)

1.0 – 1.5 kΩ (When intake air temperature is 40C)

0.30 – 0.42 kΩ (When intake air temperature is 80C)

79 – 81 Accelerator pedal position switch Continuity (when the accelerator pedal is released)

No continuity (when the accelerator pedal is

depressed slightly)
 GDI – Troubleshooting 13A-117
CHECK AT THE THROTTLE VALVE CONTROLLER TERMINALS
TERMINAL VOLTAGE CHECK CHART
Throttle Valve Controller Terminal Arrangement

Terminal Check items Requirements Normal value

No.

1 Throttle valve control servo  Ignition switch: ON Decreases slightly from

(A+)  Accelerator pedal: Fully opened → system voltage.
fully closed
9 Throttle valve control servo
(B+)

14 Throttle valve control servo  Ignition switch: ON Decreases slightly (approx.

(A–)  Accelerator pedal: Fully closed → 2 V) from system voltage.
fully opened
15 Throttle valve control servo
(B–)

2 Power supply to throttle Ignition switch: ON System voltage

valve control servo
19

5 Power supply Ignition switch: ON System voltage

6 Sensor voltage Ignition switch: ON 4.5 – 5.5 V

7 Throttle position sensor (1st Ignition switch: Release the 0.45 – 0.8 V
channel) ON accelerator pedal.

Depress the 4.2 – 4.9 V

accelerator pedal
fully.

20 Accelerator pedal position Ignition switch: Release the 0.985 – 1.085 V*1
sensor (2nd channel) ON accelerator pedal.

Depress the 4 V or more*1

accelerator pedal
fully.

NOTE:
Check that the voltage difference between *1 and *2 is 4 V or more.
13A-118 GDI – Troubleshooting

INSPECTION PROCEDURE USING AN ANALYZER

AIR FLOW SENSOR (AFS)
The followings have been changed from the previous
description.
Alternate Method (Test harness not available)
<Vehicles with M/T>
Connect the analyzer special patterns pickup to engine-ECU
terminal 61.
<Vehicles with A/T>
Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 65.

Camshaft position sensor connector Analyzer CAMSHAFT POSITION SENSOR AND CRANK ANGLE
SENSOR
Special patterns
pick-up The measurement method has been changed from the previous
description.
Measurement Method
1. Disconnect the camshaft position sensor connector and
connect the special tool (test harness: MB991709) in
Crank between. (All terminals should be connected.)
angle 2. Connect the analyzer special patterns pickup to camshaft
sensor connector position sensor terminal 2.
3. Disconnect the crank angle sensor connector and connect
the special tool (test harness: MD998478) in between.
4. Connect the analyzer special patterns pickup to crank
angle sensor terminal 2.
Alternate Method (Test harness not available)
<Vehicles with M/T>
1. Connect the analyzer special patterns pickup to
engine-ECU terminal 50. (When checking the camshaft
position sensor signal wave pattern.)
2. Connect the analyzer special patterns pickup to
engine-ECU terminal 43. (When checking the crank angle
sensor signal wave pattern.)
<Vehicles with A/T>
1. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 56. (When checking the
camshaft position sensor signal wave pattern.)
2. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 45. (When checking the crank
angle sensor signal wave pattern.)
 GDI – Troubleshooting 13A-119
INJECTORS AND INJECTOR OPEN CIRCUIT CHECK
SIGNAL
The measurement method has been changed from the previous
description.
Measurement Method
<Vehicles with M/T>
1. Connect the analyzer special patterns pickup to terminal
Special patterns
1 (No. 1 injector) of the engine-ECU connector.
Analyzer pickup 2. Connect the analyzer special patterns pickup to terminal
96 (injector open circuit check signal) of the engine-ECU
connector.
3. After checking terminal 1, check terminal 9 (No. 2 injector),
terminal 24 (No. 3 injector) and terminal 2 (No. 4 injector).
<Vehicles with A/T>
1. Connect the analyzer special patterns pickup to terminal
1 (No. 1 injector) of the engine-A/T-ECU connector.
2. Connect the analyzer special patterns pickup to terminal
Analyzer 63 (injector open circuit check signal) of the
Special patterns
engine-A/T-ECU connector.
pickup 3. After checking terminal 1, check terminal 9 (No. 2 injector),
terminal 24 (No. 3 injector) and terminal 2 (No. 4 injector).

IGNITION COIL AND POWER TRANSISTOR

(Power transistor control signal)
The followings have been changed from the previous
description.
Alternate Method (Test harness not available)
<Vehicles with M/T>
Connect the analyzer special patterns pickup to engine-ECU
terminal 3 (No. 1 ignition coil), terminal 13 (No. 2 ignition
coil), terminal 12 (No. 3 ignition coil) and terminal 4 (No. 4
ignition coil) respectively.
<Vehicles with A/T>
Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 11 (No. 1 ignition coil), terminal 12
(No. 2 ignition coil), terminal 31 (No. 3 ignition coil) and terminal
30 (No. 4 ignition coil) respectively.
13A-120 GDI – Troubleshooting

EGR VALVE (STEPPER MOTOR)

The followings have been changed from the previous
description.
Alternate Method (Test harness not available)
<Vehicles with M/T>
Connect the analyzer special patterns pickup to engine-ECU
terminal 34, connection terminal 32, connection terminal 6,
and connection terminal 5 respectively.
<Vehicles with A/T>
Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 51, connection terminal 60,
connection terminal 53, and connection terminal 62
respectively.
 GDI – On-vehicle Service 13A-121

Fixed SAS
ON-VEHICLE SERVICE
Caution
(1) Never attempt to tamper the fixed SAS. The fixed SAS
is precisely adjusted at factory.
(2) Should it be tampered, the full closed position of the
throttle valve will be changed. This causes the
engine-ECU <M/T> or engine-A/T-ECU <A/T> to learn
a wrong position of the throttle valve.

Equipment side ACCELERATOR PEDAL POSITION SENSOR

connector ADJUSTMENT
Caution
(1) Never attempt to tamper the accelerator pedal position
Accelerator pedal sensor. The sensor position is precisely adjusted at
position sensor
factory.
(2) Should it be tampered, follow the procedure below:
Accelerator pedal arm 1. Remove the accelerator pedal complete.
2. Connect the MUT-II to the diagnosis connector.
3. Loosen the accelerator pedal position sensor attaching
bolts to allow it to be loosely fitted.
4. Ensure that the accelerator pedal arm contacts the full-stop
position stopper.
5. Turn the ignition switch to the ON position (but do not
start the engine).
6. Rotate the accelerator pedal position sensor to adjust
sensor output voltage to the standard value.
Standard value: 0.985 – 1.085 V
7. Tighten the sensor mounting bolts securely.
8. Install the accelerator pedal complete.

Accelerator
pedal position
sensor
Stopper
(full stop
position) Accelerator
pedal arm
13A-122 GDI – On-vehicle Service

FUEL PRESSURE TEST

MEASUREMENT OF FUEL LOW PRESSURE BETWEEN
FUEL PUMP (LOW PRESSURE) AND FUEL PUMP
(HIGH PRESSURE)
1. Release residual pressure from the fuel pipe line to prevent
fuel gush out.
NOTE
High-pressure fuel hose
Refer to SPACE STAR ’99 Workshop Manual (Pub. No.
CMXE99E1) GROUP 13A – On-vehicle Service.
2. Disconnect the high-pressure fuel hose at the fuel pump
(high pressure) side.
Caution
Cover the hose connection with rags to prevent splash
of fuel that could be caused by some residual pressure
in the fuel pipe line.

3. Remove the union joint and bolt from the special tool
MB991637 (adapter hose) and instead attach the special tool (hose
adapter) to the adapter hose.
Gasket 4. Install the special tool (for measuring the fuel pressure)
Fuel
pump MD998709 that was set up in step 3.
(high
pressure) <When using the fuel pressure gauge set (special tool)>
MD998742 (1) Install the special tool (for measuring the fuel pressure)
High-pressure between the high-pressure fuel hose and the fuel pump
fuel hose (high pressure).
(2) Install the fuel pressure gauge set (special tool) on
the special tool (for measuring the fuel pressure)
putting the gasket between them.
(3) Connect the lead wire of the fuel pressure gauge set
(special tool) to the power supply (cigarette lighter
socket) and to the MUT-II.

<When using the fuel pressure gauge>

Fuel pressure gauge (1) Install the fuel pressure gauge on the special tool
O-ring or gasket (for measuring the fuel pressure) putting a suitable
O-ring or gasket between them.
Fuel pump MD998709
(high (2) Install the special tool which was set up in step (1)
pressure) between the high-pressure fuel hose and the fuel pump
MD998742
(high pressure).
High-pressure
fuel hose
 GDI – On-vehicle Service 13A-123
5. Connect the MUT-II to the diagnosis connector.
Caution
Turn off the ignition switch before disconnecting or
connecting the MUT-II.
6. Turn the ignition switch to ON. (But do not start the engine.)
7. Select “Item No. 07” from the MUT-II Actuator test to drive
the fuel pump (low pressure) at the fuel tank side. Check
that there are no fuel leaks from any parts.
8. Finish the actuator test or turn the ignition switch to OFF.
9. Start the engine and run at idle.
10. Measure fuel pressure while the engine is running at idle.
Standard value: approximately 324 kPa
11. Check to see that fuel pressure at idle does not drop
even after the engine has been raced several times.
12. If fuel pressure is out of the standard value, troubleshoot
and repair according to the table below.

Symptom Probable cause Remedy

 Fuel pressure too low Clogged fuel filter Replace fuel filter
 Fuel pressure drops after racing
Fuel leaking to return side due to poor Replace fuel pressure regulator
fuel pressure regulator (low pressure) (low pressure)
valve seating or settled spring

Low fuel pump (low pressure) delivery Replace the fuel pump (low pressure)
pressure

Fuel pressure too high Binding valve in fuel pressure regula- Replace fuel pressure regulator
tor (low pressure) (low pressure)

Clogged fuel return hose or pipe Clean or replace hose or pipe

13. Stop the engine and check change of fuel pressure gauge
reading. Normal if the reading does not drop within 2
minutes. If it does, observe the rate of drop and
troubleshoot and repair according to the table below.
Symptom Probable cause Remedy

Fuel pressure drops gradually after Leaky fuel pressure regulator (low Replace fuel pressure regulator
engine is stopped pressure) valve seat (low pressure)

Fuel pressure drops sharply Check valve in fuel pump (low Replace the fuel pump (low pressure)
immediately after engine is stopped pressure) is held open

14. Release residual pressure from the fuel pipe line.

NOTE
Refer to SPACE STAR ’99 Workshop Manual (Pub. No.
CMXE99E1) GROUP 13A – On-vehicle Service.
13A-124 GDI – On-vehicle Service

15. Remove the fuel pressure gauge and special tools from the
fuel pump (high pressure).
Caution
Cover the hose connection with rags to prevent splash
of fuel that could be caused by some residual pressure
in the fuel pipe line.
16. Replace the O-ring at the end of the high-pressure fuel
hose with a new one. Furthermore, apply engine oil to
the new O-ring before replacement.
17. Fit the high-pressure fuel hose to the fuel pump (high
pressure) and tighten the mounting bolt to specified torque.
18. Check for any fuel leaks by following the procedure in
step 7.
19. Disconnect the MUT-II.

MEASUREMENT OF FUEL HIGH PRESSURE BETWEEN

FUEL PUMP (HIGH PRESSURE) AND INJECTORS

Injector intermediate harness NOTE

Measurement of the fuel pressure between the fuel pump
(high pressure) and the injectors should be carried out after
checking that the fuel pressure between the fuel pump (low
pressure) and the fuel pump (high pressure) is normal.
1. Connect the MUT-II to the diagnosis connector.
2. Disconnect the injector intermediate harness connector.
3. Turn the ignition switch to ON.
4. Select “Item No. 74” from the MUT-II Data list.
5. Crank the engine continuously for 2 seconds or more,
and visually check that there are no fuel leaks from any
parts.
Caution
If any fuel leaks appear, stop cranking immediately
and repair the source of the leak.
6. Check if the fuel pressure is more than 1 MPa immediately
after 20 seconds have passed since cranking was finished.
7. If the fuel pressure is lower than 1 MPa, it means that
there is likely to be a leak in the high-pressure fuel system,
so this system should be checked.
8. Turn the ignition switch to OFF.
9. Connect the injector intermediate harness connector.
10. Start the engine and run at idle.
11. Measure fuel pressure while the engine is running at idle.
Standard value: 4 – 6.9 MPa
 GDI – On-vehicle Service 13A-125
12. Check to see that fuel pressure at idle does not drop even
after the engine has been raced several times.
13. If fuel pressure is out of the standard value, troubleshoot
and repair according to the table below.

Symptom Probable cause Remedy

 Fuel pressure too low Fuel leaking to return side due to poor Replace fuel pump (high pressure)
 Fuel pressure drops after racing fuel pressure regulator valve seating
or settled spring in the fuel pump (high
pressure).

Low fuel pump (high pressure) Replace the fuel pump

delivery pressure (high pressure)

Fuel pressure too high Clogged fuel pressure regulator valve Replace fuel pump (high pressure)
in the fuel pump (high pressure)

Clogged fuel return hose or pipe Clean or replace hose or pipe

14. Stop the engine and turn the ignition switch to OFF.
15. Disconnect the MUT-II.

FUEL LEAK CHECK

1. Connect the MUT-II to the diagnosis connector.
Injector intermediate harness
2. Disconnect the injector intermediate harness connector.
3. Turn the ignition switch to ON.
4. Select “Item No. 74” from the MUT-II Data list.
5. Crank the engine continuously for two seconds or more,
and visually check that there are no fuel leaks from any
parts.
Caution
If any fuel leaks appear, stop cranking immediately
and repair the source of the leak.
6. Crank the engine, and then measure fuel pressure
immediately after 20 seconds.
Limit: Minimum 1 MPa
Caution
If the fuel pressure is less than 1 MPa, there may
be a partial fuel leak in the high-pressure fuel system.
7. Turn off the ignition switch.
8. Reconnect the injector intermediate connector.
9. Remove the MUT-II.
13A-126 GDI – On-vehicle Service

COMPONENT LOCATION
Name Symbol Name Symbol

Engine-A/T-ECU <A/T> B Oxygen sensor (front) C

Ignition failure sensor A Oxygen sensor (rear) D

B C D
 GDI – On-vehicle Service 13A-127

Equipment side ACCELERATOR PEDAL POSITION SENSOR

connector (1ST AND 2ND CHANNELS) CHECK
1. Disconnect the accelerator pedal position sensor
connector.
Accelerator pedal 2. Measure resistance between terminal Nos. 2 (1st channel
position sensor power supply) and 1 (1st channel earth) as well as between
terminal Nos. 8 (2nd channel power supply) and terminal
No. 7 (2nd channel earth) of the sensor connector.
Accelerator pedal arm
Standard value: 3.5 – 6.5 kΩ
3. Measure resistance between terminal Nos. 2 (1st channel
power supply) and 3 (1st channel output) as well as
between terminal Nos. 8 (2nd channel power supply) and
terminal No. 6 (2nd channel output) of the sensor
connector.
Normal condition:
Depress the accelerator Resistance value changes in
pedal slowly. accordance with the
accelerator pedal
depression smoothly.
4. If not within the standard value, or resistance value does
not change smoothly, replace the accelerator pedal position
sensor.
NOTE
After replacement, adjust the accelerator pedal position
sensor. (Refer to P.13A-121.)

Equipment side ACCELERATOR PEDAL POSITION SWITCH

connector CHECK
1. Disconnect the accelerator pedal position sensor
connector.
Accelerator pedal 2. Check continuity between terminal Nos. 4 (accelerator
position sensor pedal position switch) and 5 (earth) of the connector.
Normal condition:
Accelerator pedal arm
Accelerator pedal Continuity
Depressed No continuity
Released Continuity (0 Ω)
3. If defective, replace the accelerator pedal position sensor.
NOTE
After replacement, adjust the accelerator pedal position
sensor. (Refer to P.13A-121.)
13A-128 GDI – On-vehicle Service

Equipment side Oxygen sensor OXYGEN SENSOR CHECK

connector (front)
<Oxygen sensor (front)>
1. Disconnect the oxygen sensor connector and connect the
special tool (test harness) to the connector on the oxygen
sensor side.
2. Make sure that there is continuity (4.5 – 8.0 Ω at 20C)
between terminal 1 (red clip of special tool) and terminal
3 (blue clip of special tool) on the oxygen sensor connector.

3. If there is no continuity, replace the oxygen sensor.

4. Warm up the engine until engine coolant is 80C or higher.
Red
Blue

MD998464

5. Use a jumper wire to connect terminal 1 (red clip) of the

oxygen sensor connector to the battery (+) terminal and
White Black
terminal 3 (blue clip) to the battery (–) terminal.
Caution
Red Be very careful when connecting the jumper wire;
incorrect connection can damage the oxygen sensor.
Blue 6. Connect a digital voltage meter between terminal 2 (black
clip) and terminal 4 (white clip).
7. While repeatedly racing the engine, measure the oxygen
MD9998464 sensor output voltage.
Standard value:
Engine Oxygen sensor Remarks
output voltage
When racing 0.6 – 1.0 V If you make the air/fuel
the engine ratio rich by racing the
engine repeatedly, a nor-
mal oxygen sensor will
output a voltage of 0.6 –
1.0 V.
8. If the sensor is defective, replace the oxygen sensor.
NOTE
For removal and installation of the oxygen sensor, refer
to GROUP 15 – Exhaust Pipe and Main Muffler.
 GDI – On-vehicle Service 13A-129
<Oxygen sensor (rear)>
Equipment side connector
1. Disconnect the oxygen sensor connector and connect the
special tool (test harness set) to the connector on the
oxygen sensor side.
2. Make sure that there is continuity (11 – 18 Ω at 20C)
between terminal 3 and terminal 4 on the oxygen sensor
connector.
3. If there is no continuity, replace the oxygen sensor.
Oxygen sensor (rear) NOTE
(1) If the MUT-II does not display the standard value
although no abnormality is found by the above
mentioned continuity test and harness check, replace
the oxygen sensor (rear).
(2) For removal and installation of the oxygen sensor,
refer to GROUP 15 – Exhaust Pipe and Main Muffler.
MB991223
13A-130 GDI – Fuel Pump (High Pressure)

FUEL PUMP (HIGH PRESSURE)

REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
 Engine Cover Removal and Installation  Air Cleaner Assembly Removal and Installation
(Refer to GROUP 11A – Camshaft, Camshaft Oil  Throttle Body Remove and Installation
Seal.) (Refer to P.13A-137.)
 Prevention of Fuel Discharge <before removal only>  Intake Manifold Removal and Installation
 Fuel Leak Check <after installation only> (Refer to GROUP 15.)

11 - 13 Nm

2
5
4 5
3 4
3

Apply engine oil to 1 6

all O-rings during
5.0 Nm → 17 Nm
ins t allation.

Removal steps
D  Air bleeding the high-pressure fuel B 4. O-ring
path B 5. Back-up ring B
C 1. Fuel return hoses connection A 6. Fuel pump (high pressure)
B 2. Fuel pipe 7. O-ring
B 3. Back-up ring A 8. Insulator
 GDI – Fuel Pump (High Pressure) 13A-131
INSTALLATION SERVICE POINTS
A FUEL PUMP (HIGH PRESSURE) INSTALLATION
1. Apply a small amount of fresh engine oil to the fuel pump
(high pressure) roller and O-ring.
2. Insert the fuel pump (high pressure) to the cylinder head
ports squarely, and the tighten the mounting bolts
temporarily (a little more tightly than finger-tightening).
Tightening them to the specified torque should be carried
out in later step B.

B BACK-UP RING B/O-RING/BACK-UP RING A/FUEL

PIPE INSTALLATION
O-ring
Back-up ring A 1. Install the back-up rings and the O-ring as shown in the
illustration.
Caution
(1) Install the back-up ring B facing its cutaway
surface toward the opposite side of the O-ring
Cutaway as shown in the illustration.
surface
(2) Confirm the outer diameter of the back-up ring
Back-up ring B A. Take care not to install the back-up ring for
the fuel pressure sensor by mistake. (Outer
diameter of the back-up ring A: 14.8 mm)
2. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the fuel pump (high-pressure) or the delivery pipe
assembly.
3. Install the fuel pipe into the fuel pump (high pressure)
and the delivery pipe ports squarely. Insert the pipe
securely, being careful not to twisting it, and then tighten
the mounting bolts to the specified torque.
Tightening torque: 11 – 13 Nm

4. Tighten the temporarily tightened mounting bolts of the

fuel pump (high pressure) in shown odder to 5.0 Nm.
5. Tighten the bolts to 17 Nm in the order shown in the
1 3
illustration. The overall difference in tightening torque
between the four bolts should be within 2 Nm.

4 2

C FUEL RETURN HOSES INSTALLATION

Install the fuel return hoses so that the identification mark
of fuel return hoses comes to the illustrated position.

White mark

Blue mark
13A-132 GDI – Fuel Pump (High Pressure)

D AIR BLEEDING THE HIGH-PRESSURE FUEL

PATH
1. Air-bleed the high-pressure fuel path with the engine
running at 2000 r/min for 15 seconds or more.
NOTE
When the air is trapped into the high-pressure fuel path
due to the fuel pipe removal, an abnormality in the fuel
pressure causes the output of diagnosis code No. 56.
2. If diagnosis code No. 56 at the fuel pressure sensor system
is output after the diagnosis code is confirmed by MUT-II,
the code will be erased.
 GDI – Fuel Injector 13A-133
FUEL INJECTOR
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
 Engine Cover Removal and Installation  Fuel Leak Check <after installation only>
(Refer to GROUP 11A – Camshaft, Camshaft Oil  Air bleeding the high-pressure fuel path
Seal.) <after installation only>
 Prevention of Fuel Discharge <before removal only>

11 – 13 Nm
Apply engine oil to all
O-rings during 22 – 26 Nm
installation.

8 1
11
10 11
2
9 10
3
9 5
4

11 – 13
Nm
12 – 14 Nm
15 7

10 – 12 Nm
22 6
19
20
21
17 14
18
16

21 – 25 Nm
12
13

Fuel pressure sensor removal steps C 9. Back-up ring A

1. Fuel pressure sensor connector C 10. O-ring
A E 2. Flange C 11. Back-up ring B
E 3. Fuel pressure sensor B 12. Injector washer
D 4. O-ring B 13. Injector holder
D 5. Back-up ring B B 14. Delivery pipe and fuel injector as-
sembly
B 15. Insulator
Fuel injector removal steps B 16. Injector gasket
 Air cleaner B 17. Fuel injector
 Throttle body (Refer to P.13A-137.) A 18. Corrugated washer
 Intake manifold (Refer to GROUP 15.) A 19. Back-up ring A
6. Injector harness A 20. O-ring
7. Injector harness support bracket A 21. Back-up ring B
C 8. Fuel pipe 22. Delivery pipe
13A-134 GDI – Fuel Injector

REMOVAL SERVICE POINTS

Fuel pressure
sensor
A FLANGE REMOVAL
Flange If the fuel pressure sensor is reused, make mating marks
on the sensor and the flange.
NOTE
The flange secures sealing performance of fuel pressure
sensor and installation rigidity by bending to deform the shape
Mating marks at installation. Therefore, make mating marks to install the
flange with the right phase and side. In addition, If the fuel
pressure sensor is replaced with a new one, replace it together
with the flange as a set.

B DELIVERY PIPE AND FUEL INJECTOR

ASSEMBLY REMOVAL
Remove the delivery pipe with the fuel injector assembly still
attached.
Caution
Be careful not to drop the fuel injector assembly when
removing the delivery pipe.

INSTALLATION SERVICE POINTS

O-ring A BACK-UP RING B/O-RING/BACK-UP RING
Back-up ring A A/CORRUGATED WASHER INSTALLATION
1. Install the back-up rings and the O-ring as shown in the
illustration.
Caution
Cutaway (1) Install the back-up ring B facing its cutaway
surface surface toward the opposite side of the O-ring
Back-up ring B as shown in the illustration.
(2) Confirm the outer diameter of the back-up ring
A. Take care not to install the back-up ring for
the fuel pressure sensor by mistake. (Outer
Corrugated washer diameter of the back-up ring A: 14.8 mm)
2. Apply petroleum jelly to the corrugated washer to prevent
it from dropping, and then install it to the direction shown.
Caution
The corrugated washer should always be replace with
Good No good
a new part.
f

B FUEL INJECTOR/INJECTOR

GASKET/INSULATOR/DELIVERY PIPE AND FUEL
INJECTOR ASSEMBLY/INJECTOR
HOLDER/INJECTOR WASHER INSTALLATION
1. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside the
delivery pipe.
 GDI – Fuel Injector 13A-135
2. While being careful not to damage the O-ring, turn the
Fuel injector fuel injector to the left and right and connect it to the
delivery pipe. After connecting, check that the fuel injector
turns smoothly.
Mating 3. If the fuel injector does not turn smoothly, the cause may
marks be that the O-ring is getting caught. Remove the fuel
Delivery pipe injector, check the O-ring for damage and re-connect the
fuel injector to the delivery pipe assembly and then
re-check.
4. Align the Fuel injector mating mark with the delivery pipe
mating mark.
5. Install the injector gasket and insulator to the cylinder
head.
6. Install the delivery pipe and fuel injector assembly to the
cylinder head, and then temporarily tighten mounting bolts.
7. Install the injector holder and the injector washer then
tighten mounting bolts to the specified torque.
Tightening torque: 21 – 25 Nm

8. Tighten the mounting bolts to temporarily tighten the

delivery pipe and the fuel injector assembly according
to the illustrated sequence to the specified torque.
Tightening torque: 11 – 13 Nm
3 1 2 4

C BACK-UP RING B/O-RING/BACK-UP RING

A/FUEL PIPE INSTALLATION
O-ring
Back-up ring A 1. Install the back-up rings and the O-ring as shown in the
illustration.
Caution
(1) Install the back-up ring B facing its cutaway
surface toward the opposite side of the O-ring
Cutaway as shown in the illustration.
surface
(2) Confirm the outer diameter of the back-up ring
Back-up ring B A. Take care not to install the back-up ring for
the fuel pressure sensor by mistake. (Outer
diameter of the back-up ring A: 14.8 mm)
2. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the fuel pump (high pressure) or the delivery pipe.
3. Insert the fuel pipe into the fuel pump (high pressure)
and the delivery pipe ports squarely. Insert the pipe
securely, being careful not to twisting it, and then tighten
the mounting bolts to the specified torque.
Tightening torque: 11 – 13 Nm
13A-136 GDI – Fuel Injector

D BACK-UP RING/O-RING INSTALLATION

Back-up ring Install the back-up ring and the O-ring as shown in the
O-ring illustration.
Caution
Be careful not to confuse this back-up ring with the
back-up ring A for the fuel injector or back-up ring A
for the fuel pipe. (External diameter of the back-up ring:
15.1 mm)
Fuel pressure sensor

E FUEL PRESSURE SENSOR/FLANGE

INSTALLATION
1. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the delivery pipe.

2. Install the fuel pressure sensor so that the part number

Fuel pressure sensor
label comes to the same direction shown in the illustration.
If the old fuel pressure sensor is reused, Install the sensor
to the delivery pipe using the mating mark made during
its removal.
Caution
If the fuel pressure sensor is replaced with a new
one, replace it together with the flange as a set.
Part number label
 GDI – Throttle Body 13A-137
THROTTLE BODY
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
 Engine Cover Removal and Installation  Fuel Leak Check <after installation only>
(Refer to GROUP 11A – Camshaft, Camshaft Oil  Engine Coolant Draining and Supplying
Seal.)  Air Cleaner Removal and Installation
 Prevention of Fuel Discharge <before removal only>

19 Nm
1

24 Nm

(Engine Oil)

7
11
3
6 5
9 2
5.0 Nm

9.0 Nm 10
5.0 Nm 5

Removal steps
1. Throttle position sensor connector B 7. O-ring
2. Idle speed control servo connector 8. Throttle body stay
3. Ignition failure sensor 9. Throttle body
4. Water hose 10. Water hose
5. Water hose connection A 11. Throttle body gasket
B 6. High-pressure fuel hose connection

INSTALLATION SERVICE POINTS

A THROTTLE BODY GASKET INSTALLATION
Install the throttle body gasket so that the projection comes
to the illustrated position.

Projection
13A-138 GDI – Throttle Body

B O-RING/HIGH-PRESSURE FUEL HOSE

INSTALLATION
1. Apply a small amount of new engine oil to the O-ring.
Caution
Do not let any engine oil get into the delivery pipe.
2. While turning the high-pressure fuel hose to the right and
left, install the delivery pipe, while being careful not to
damage the O-ring. After installing, check that the hose
turns smoothly.
3. If the hose does not turn smoothly, the O-ring is probably
being clamped. Disconnect the high-pressure fuel hose
and check the O-ring for damage. After this, re-insert the
delivery pipe and check that the hose turns smoothly.
4. Tighten to the specified torque.
Tightening torque: 5.0 Nm
 GDI – Throttle Body 13A-139
DISASSEMBLY AND REASSEMBLY

Disassembly steps
A 1. Throttle position sensor
2. Throttle body

REASSEMBLY SERVICE POINTS

A THROTTLE POSITION SENSOR
1. Position the throttle position sensor on the throttle body
along the dotted line as shown in the illustration.
2. Rotate the throttle position sensor anticlockwise as shown
in the illustration, and then tighten the screws.

3. Measure resistance value between terminal Nos. 1 (sensor

Throttle posi-
power supply) and 2 (throttle position sensor 1st-channel
Earth tion sensor output) as well as 1 (sensor power supply) and 4 (throttle
Sensor power
supply (2nd channel) position sensor 2nd-channel output).
output
Normal condition

Open the throttle valve slowly Resistance value changes

from the idle position to smoothly in response to
full-open position. throttle valve opening angle.
Throttle position sensor
(1st channel) output 4. If the resistance value does not change smoothly, replace
the throttle position sensor.
NOTES
 13B-1

MULTIPOINT FUEL
INJECTION (MPI)
CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ON-VEHICLE SERVICE . . . . . . . . . . . . . . . . . . . . 78

Outline of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Basic Idle Speed Adjustment . . . . . . . . . . . . . . . . 78
Component Location . . . . . . . . . . . . . . . . . . . . . . . . 79
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 2
Intake Air Temperature Sensor Check . . . . . . . . 80
SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . . 4 Oxygen Sensor Check . . . . . . . . . . . . . . . . . . . . . . 80

SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 FUEL INJECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . 82

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 5 THROTTLE BODY . . . . . . . . . . . . . . . . . . . . . . . . . 84

13B-2 MPI – General/General Information

GENERAL
OUTLINE OF CHANGES
The service procedures have been established to describe revised sections due to the changed items
shown below.
 On-board Diagnostics System has been adopted, diagnostic items have been expanded, and diagnostic
code numbering system has been changed.
 Non-distributor two-coiled ignition system has been adopted.
 Crank angle sensor attached to the crank shaft has been adopted.
 Camshaft position sensor has been added.
 Ignition failure sensor has been added.
 Intake air temperature sensor built in the vacuum sensor (manifold absolute pressure sensor) has
been adopted.
 Oxygen sensor (front, rear) has been changed.
 Ignition timing adjustment terminal has been abolished.

GENERAL INFORMATION
SELF-DIAGNOSIS FUNCTION
The following functions have been added.
 The engine-ECU records the engine operating condition when the diagnosis code is set.
This data is called “freeze frame” data.
This data can be read by using the MUT-II, are can then be used in simulation tests for troubleshooting.

GENERAL SPECIFICATIONS
Item Specifications

Engine-ECU Identification No. E2T71279

 MPI – General Information 13B-3
MULTI-POINT FUEL INJECTION SYSTEM DIAGRAM
1 Oxygen sensor (front) Engine- 1 Injector
2 Vacuum sensor ECU 2 Purge control solenoid valve
3 Intake air temperature sensor 3 Idle speed control valve
4 Throttle position sensor 4 EGR control servo valve
5 Camshaft position sensor
6 Crank angle sensor  Fuel pump relay
7 Engine coolant temperature sensor  Engine control relay
8 Detonation sensor  A/C power relay
9 Oxygen sensor (rear)  Engine warning lamp
 Diagnosis signal
 Power supply voltage  Ignition coil (power transistor)
 Vehicle speed sensor  Fan controller
 A/C switch
 Power steering fluid pressure switch
 Vehicle speed sensor
 Ignition switch – ST
 Ignition switch – IG

4 Throttle position sensor

2 Vacuum sensor 3 Idle speed control valve

3 Intake air temperature sensor
Air cleaner
5 Camshaft position sensor

Air
Fuel pressure
regulator

From fuel
To fuel pump
tank
1 EGR valve
PCV valve Injector Canister
1 Oxygen
sensor 2 Purge control
(front) 7 Engine coolant
temperature sensor solenoid valve

Catalytic 4 EGR control solenoid valve

converter 8 Detonation
sensor
9 Oxygen
sensor (rear)

Catalytic
6 Crank angle sensor converter
13B-4 MPI – Service Specifications/Special Tools

SERVICE SPECIFICATIONS
Items Standard value

Intake air temperature sensor resistance kΩ 20C 2.3 – 3.0

80C 0.30 – 0.42

Oxygen sensor output voltage (during revving) V 0.6 – 1.0

Oxygen sensor heater resistance (at 20C) Ω Front 4.5 – 8.0

Rear 11 – 18

SPECIAL TOOLS
Tool Number Name Use
MB991536 Throttle position  Measurement of voltage during trouble-
sensor adjustment shooting
harness

MB991658 Test harness set  Measurement of voltage during trouble-

shooting

MD998464 Test harness  Measurement of voltage during trouble-

(4-pin, square) shooting
 Inspection of oxygen sensor (front)

MD998478 Test harness  Measurement of voltage during trouble-

(3-pin, triangle) shooting
 Inspection using an analyzer
 MPI – Troubleshooting 13B-5
TROUBLESHOOTING
DIAGNOSIS FUNCTION
Engine warning lamp ENGINE WARNING LAMP (CHECK ENGINE LAMP)
(check engine lamp)
If an abnormality occurs in any of the following items related
to the Multipoint Fuel Injection (MPI) system, the engine
warning lamp will illuminate. If the lamp remains illuminated
or if the lamp illuminates while the engine is running, check
the diagnosis code output.
However, the warning lamp will illuminate as bulb check for
five seconds whenever the ignition switch is turned to the
ON position.

Engine warning lamp inspection items

Code No. Diagnosis item
– Engine-ECU
P0105 Vacuum sensor system
P0110 Intake air temperature sensor system
P0115 Engine coolant temperature sensor system
P0120 Throttle position sensor system
P0125 Feedback system
P0130 Oxygen sensor (front) system <sensor 1>
P0135 Oxygen sensor heater (front) system <sensor 1>
P0136 Oxygen sensor (rear) system <sensor 2>
P0141 Oxygen sensor heater (rear) system <sensor 2>
P0170 Abnormal fuel system
P0201 No. 1 injector system
P0202 No. 2 injector system
P0203 No. 3 injector system
P0204 No. 4 injector system
P0300 Random cylinder misfire detected
P0301 No. 1 cylinder misfire detected
P0302 No. 2 cylinder misfire detected
P0303 No. 3 cylinder misfire detected
P0304 No. 4 cylinder misfire detected
P0335 Crank angle sensor system
P0340 Camshaft position sensor system
P0403 EGR control solenoid valve system
P0420 Catalyst malfunction
P0443 Purge control solenoid valve system
P0505 Idle speed control system
13B-6 MPI – Troubleshooting

NOTE
1. If the engine warning lamp illuminates because of a malfunction of the engine-ECU, communication
between MUT-II and the engine-ECU is impossible. In this case, the diagnosis code cannot be read.
2. After the engine-ECU has detected a malfunction, the engine warning lamp illuminates when the engine
is next turned on and the same malfunction is re-detected. However, for items marked with a “”
in the diagnosis code number column, the engine warning lamp illuminates only on the first detection
of the malfunction.
3. After the engine warning lamp illuminates, it will be switched off under the following conditions.
(1) When the engine-ECU monitored the power train malfunction three times* and met set condition
requirements, it detected no malfunction.
*: In this case, “one time” indicates from engine start to stop.
(2) For misfiring malfunction, when driving conditions (engine speed, engine coolant temperature, etc.)
are similar to those when the malfunction was first recorded.
4. Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.

METHOD OF READING AND ERASING DIAGNOSIS

CODES
Refer to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.
DIAGNOSIS USING DIAGNOSIS 2 MODE
1. Switch the diagnosis mode of the engine control unit to
DIAGNOSIS 2 mode using the MUT-II.
2. Carry out a road test.
3. Take a reading of the diagnosis code and repair the problem
location.
4. Turn the ignition switch to OFF and then back to ON again.
NOTE
By turning the ignition switch to OFF, the engine-ECU will
switch the diagnosis mode from DIAGNOSIS 2 mode to
DIAGNOSIS 1 mode.
5. Erase the diagnosis codes.
INSPECTION USING MUT-II DATA LIST AND
ACTUATOR TESTING
1. Carry out inspection by means of the data list and the
actuator test function. If there is an abnormality, check
and repair the chassis harnesses and components.
2. After repairing, re-check using the MUT-II and check that
the abnormal input and output have returned to normal
as a result of the repairs.
3. Erase the diagnosis code memory.
4. Remove the MUT-II, and then start the engine again and
carry out a road test to confirm that the problem has
disappeared.
MPI – Troubleshooting 13B-7
FREEZE FRAME DATA
When the engine-ECU detects a malfunction and stores a
diagnosis code, it also stores a current status of the engine.
This function is called “freeze frame data.” By analyzing this
“freeze frame” data with the MUT-II, an effective
troubleshooting can be performed.
Displayed items of freeze frame data are shown in the following:
DISPLAYED ITEM LIST

Data item Unit

Engine coolant temperature sensor C

Engine speed r/min

Vehicle speed km/h

Long-term fuel compensation (long-term %

fuel trim)

Short-term fuel compensation (short-term %

fuel trim)

Fuel control condi- Open loop OL

tion
Closed loop CL

Open loop owing to OL-DRV.

drive condition

Open loop owing to OL-SYS.

system malfunction

Closed loop based CL-H02S

on one oxygen sen-
sor

Calculation load value %

Diagnosis code during data recording –

NOTE
If malfunctions have been detected in multiple systems, store
one malfunction only, which has been detected first.
READINESS TEST STATUS
The engine-ECU monitors the following main diagnosis items,
judges if these items are in good condition or not, and the
stores its history. This history can be read out by using MUT-II.
(If the ECU has judged a item before, the MUT-II displays
“Complete.”)
In addition, if diagnosis codes are erased or the battery cable
is disconnected, this history will also be erased (the memory
will be reset).
 Catalyst: P0421
 Oxygen sensor: P0130
 Oxygen sensor heater: P0135, P0141
13B-8 MPI – Troubleshooting

FAIL-SAFE FUNCTION REFERENCE TABLE

When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled by
means of the pre-set control logic to maintain safe conditions for driving.

Malfunctioning item Control contents during malfunction

Vacuum sensor 1. Uses the throttle position sensor signal and engine speed signal (crank angle sensor
signal) to take reading of the basic injector drive time and basic ignition timing from
the pre-set mapping.
2. Fixes the ISC servo in the appointed position so idle control is not performed.

Intake air temperature Controls as if the intake air temperature is 45C.

sensor

Throttle position sen- No increase in fuel injection amount during acceleration due to the throttle position sensor
sor (TPS) signal.

Engine coolant tem- Controls as if the engine coolant temperature is 80C.

perature sensor

Camshaft position sen- Injects fuel into the cylinders in the order 1-3-4-2 with irregular timing. (After the ignition switch
sor is turned to ON, the No. 1 cylinder top dead centre is not detected at all.)

Detonation sensor Switches the ignition timing from ignition timing for super petrol to ignition timing for standard
petrol.

Oxygen sensor (front) Air/fuel ratio feedback control (closed loop control) is not performed.

Oxygen sensor (rear) Performs the feedback control (closed loop control) of the air/fuel ratio by using only the signal
of the oxygen sensor (front) installed on the front of the catalytic converter.

Misfire detection The engine-ECU stops supplying fuel to the cylinder with the highest misfiring rate if a
misfiring that could damage the catalytic converter is detected.
 MPI – Troubleshooting 13B-9
INSPECTION CHART FOR DIAGNOSIS CODES
Code No. Diagnosis item Reference page
P0105 Vacuum sensor system 13B-10
P0110 Intake air temperature sensor system 13B-12
P0115 Engine coolant temperature sensor system 13B-13
P0120 Throttle position sensor system 13B-16
P0125 Feedback system 13B-18
P0130 Oxygen sensor (front) system <sensor 1> 13B-19
P0135 Oxygen sensor heater (front) system <sensor 1> 13B-21
P0136 Oxygen sensor (rear) system <sensor 2> 13B-22
P0141 Oxygen sensor heater (rear) system <sensor 2> 13B-24
P0170 Abnormal fuel system 13B-25
P0201 No. 1 injector system 13B-26
P0202 No. 2 injector system 13B-26
P0203 No. 3 injector system 13B-26
P0204 No. 4 injector system 13B-26
P0300 Random cylinder misfire detected 13B-27
P0301 No. 1 cylinder misfire detected 13B-28
P0302 No. 2 cylinder misfire detected 13B-28
P0303 No. 3 cylinder misfire detected 13B-28
P0304 No. 4 cylinder misfire detected 13B-28
P0325 Detonation sensor system 13B-29
P0335 Crank angle sensor system 13B-25
P0340 Camshaft position sensor system 13B-31
P0403 EGR control solenoid valve system 13B-32
P0421 Catalyst malfunction 13B-33
P0443 Purge control solenoid valve system 13B-34
P0500 Vehicle speed sensor system 13B-35
P0505 Idle speed control system 13B-36
P1610 Immobilizer system 13B-38

NOTE
1. Do not replace the engine-ECU until a through terminal check reveals there are no short/open circuit.
2. Check that the engine-ECU earth circuit is normal before checking for the cause of the problem.
3. After the engine-ECU has detected a malfunction, a diagnosis code is recorded the next time the
engine is started and the same malfunction is re-detected. However, for items marked with a “”,
the diagnosis code is recorded on the first detection of the malfunction.
4. Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.
13B-10 MPI – Troubleshooting

INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE

Code No. P0105 Vacuum sensor system Range of Check
Range of Check  Malfunction of the vacuum sensor
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness
 The output voltage of the vacuum sensor is 4.5 V or more for 2 seconds.  Malfunction of the engine-ECU
(This corresponds to the absolute manifold pressure of 115 kPa or more.)
Range of Check
 The output voltage of the throttle position sensor is 1.25 V or more.
or
 The vehicle is stationary.
Set Conditions
 The output voltage of the vacuum sensor is 0.2 V or less for 2 seconds.
(This corresponds to the absolute manifold pressure of 4.9 kPa or less.)

MUT-II Data list OK Transient malfunction

32 Barometric pressure sensor (Refer to GROUP 00 – Points to
(Refer to P.13B-65, DATA LIST Note for Intermittent Malfunctions.)
REFERENCE TABLE.)
NG
Check the following connector: NG
A-95 Repair
OK
(1) NG
Measure at vacuum sensor Measure at engine-ECU connector OK Check the following connector:
connector A-95. B-31. B-31
 Disconnect the connector and  Measure the voltage at the OK NG
measure at the harness side. engine-ECU terminal. Repair
(1) Voltage between terminal 2 and  Ignition switch: ON
earth (Ignition switch: ON)  Voltage between terminal 81 and Check the harness between the
OK: 4.8 – 5.2 V earth vacuum sensor and the
(2) Resistance between terminal 3 OK: 4.8 – 5.2 V engine-ECU, and repair if necessary.
and earth NG
OK: 2 Ω or less NG
Check the following connector: Repair
B-31
OK
Check the harness between the NG
Repair
vacuum sensor and the engine-ECU.
OK
NG
Check the trouble symptoms. Replace the engine-ECU.

(2) NG Check the following connector: NG

Repair
B-31
OK
Check the harness between the NG Repair
vacuum sensor and the engine-ECU.
OK
NG
Check the trouble symptoms. Replace the engine-ECU.
OK
(1) NG NG
Measure at vacuum sensor Check the following connector: Repair
connector A-95. (3) NG B-31
 Connect connector terminals OK
No.1, No.2 and No.5 only by
using test harness (MB991348), Check the harness between the
and measure at the pick-up vacuum sensor and the
harness. engine-ECU, and repair if necessary.
 Ignition switch: ON
(1) Voltage between terminal 2 and (2) NG
Replace the vacuum sensor.
earth
OK: 4.8 – 5.2 V
(2) Voltage between terminal 4 and Check the trouble symptoms.
earth
NG
OK: Altitude 0 m: 3.7 – 4.3 V
Altitude 1200 m: NG
Check the following connector: Repair
3.2 – 3.8 V
B-31
(3) Voltage between terminal 3 and
earth OK
OK: 0.5 V or less Check the harness between the
OK vacuum sensor and the
engine-ECU, and repair if necessary.
To the next page
 MPI – Troubleshooting 13B-11
From the previous page
OK
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-31. B-31
 Measure the voltage at the
OK
engine-ECU terminal.
 Ignition switch: ON Check the harness between the
 Voltage between terminal 85 and vacuum sensor and the
earth engine-ECU, and repair if necessary.
OK: Altitude 0 m: 3.7 – 4.3 V OK NG
Altitude 1200 m: Check the following connector: Repair
3.2 – 3.8 V B-31
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
13B-12 MPI – Troubleshooting

Code No. P0110 Intake air temperature sensor system Probable cause
Range of Check  Malfunction of intake air temperature sensor
 Two seconds have passed since the ignition switch is turned ON or the  Open or short circuit in intake air temperature
engine starting process is completed. sensor or loose connector contact
Set Conditions  Malfunction of engine-ECU
 The sensor output voltage is 4.6 V or more for two seconds (equivalent to
–45C of intake air temperature)
or
 The sensor output voltage is 0.2 V or more for two seconds (equivalent to
125C of intake air temperature)

OK
MUT-II Data list Transient malfunction
13 Intake air temperature sensor (Refer to GROUP 00 – Points to
OK: Roughly the same as am- Note for Intermittent Malfunctions.)
bient temperature.
NG
NG
Check the intake air temperature Repair
sensor.
(Refer to P.13B-80.)
OK
NG
Check following connector: A-95 Repair
OK
(1) NG NG
Measure at vacuum sensor Check the following connector: Repair
connector A-95. B-31
 Disconnect the connector and OK
measure at the harness side.
(1) Resistance between terminal 3 Check the harness between the NG
Repair
and earth intake air temperature sensor and
OK: 2 Ω or less the engine-ECU.
(2) Voltage between terminal 1 and OK
earth NG
(Ignition switch: ON) Check the trouble symptoms. Replace the engine-ECU.
OK: 4.8 – 5.2 V
(2) NG OK
Measure at engine-ECU connector Check the following connector:
B-31. B-31
 Measure the voltage at the OK NG
engine-ECU terminal. Repair
 Disconnect connector A-95.
 Ignition switch: ON Check the harness between the air
 Voltage between terminal 72 and flow sensor and the engine-ECU,
earth and repair if necessary.
OK: 4.8 – 5.2 V
NG

Check the following connector: NG

B-31 Repair
OK
NG
Check the harness between the Repair
intake air temperature sensor and
the engine-ECU.
OK
OK
To the next page NG
Check the trouble symptoms. Replace the engine-ECU.
 MPI – Troubleshooting 13B-13
From the previous page
OK
NG NG
Measure at intake air temperature Check the following connector: Repair
sensor connector A-95. B-31
 Use the test harness OK
(MB991348) to connect only
terminals 1 and 3, and then Check the harness between the
measure at the pick-up harness. intake air temperature sensor and
 Ignition switch: ON the engine-ECU, and repair if
 Voltage between terminal 1 and necessary.
earth
OK: Ambient temperature 0C:
3.2 – 3.8 V
Ambient temperature 20C:
2.3 – 2.9 V
Ambient temperature 40C:
1.5 – 2.1 V
Ambient temperature 80C:
0.4 – 1.0 V
OK
NG
Check the trouble symptoms. Replace the engine-ECU.

Code No. P0115 Engine coolant temperature sensor Probable cause

system
Range of Check  Malfunction of engine coolant temperature sensor
 Engine: Two seconds after the engine has been started  Open or short circuit in the engine coolant
Set Conditions temperature sensor circuit or loose connector
 The sensor output voltage is 4.6 V or more for two seconds (equivalent to contact
–45C of engine coolant temperature)  Malfunction of engine-ECU
or
 The sensor output voltage is 0.1 V or less for two seconds (equivalent to
140C of engine coolant temperature)
Range of Check
 Engine: After starting
Set Conditions
 The engine coolant temperature has reduced from over 40C to less than
40C, and that condition has lasted for five minutes or more.
13B-14 MPI – Troubleshooting

OK
MUT-II Data list Transient malfunction
21 Engine coolant temperature (Refer to GROUP 00 – Points to
sensor Note for Intermittent Malfunctions.)
OK: When the engine is cold,
the temperature is roughly
the same as ambient tem-
perature. If warm, it is 80
– 120C.
NG
NG
Measure at engine coolant Replace
temperature sensor connector A-76.
 Disconnect the connector and
measure at the harness side.
 Resistance between terminals 1
and 2
OK: At 20C of engine coolant
temperature: 2.1 – 2.7 kΩ
At 80C of engine coolant
temperature: 0.26 – 0.36
kΩ
OK

Check the following connector: NG

A-76 Repair
OK
(1) NG OK
Measure at engine coolant Measure at engine-ECU connector Check the following connector:
temperature sensor connector A-76. B-31. B-31
 Disconnect the connector and  Measure the voltage at the NG
OK
measure at the harness side. engine-ECU terminal. Repair
(1) Voltage between terminal 1 and  Disconnect connector A-76.
earth  Ignition switch: ON Check the harness wire between
(Ignition switch: ON)  Voltage between terminal 83 and the engine coolant temperature
OK: 4.8 – 5.2 V earth sensor and the engine-ECU, and
(2) Resistance between terminal 2 OK: 4.8 – 5.2 V repair if necessary.
and earth NG
OK: 2 Ω or less
Check the following connector: NG
B-31 Repair

OK
Check the harness wire between
the engine coolant temperature NG
Repair
sensor and the engine-ECU.
OK
NG
Check the trouble symptoms. Replace the engine-ECU.
(2) NG NG
Check the following connector: Repair
B-31
OK
OK Check the harness wire between NG
the engine coolant temperature Repair
To the next page
sensor and the engine-ECU.
OK
NG
Check the trouble symptoms. Replace the engine-ECU.
 MPI – Troubleshooting 13B-15
From the previous page
OK
NG NG
Measure at engine coolant Check the engine coolant Repair
temperature sensor connector A-76. temperature sensor.
 Use test harness (MB991658) to (Refer to P.13B-71*.)
connect the connector, and
measure at the pick-up harness. OK
NG
 Ignition switch: ON Check the following connectors: Repair
 Voltage between terminal 1 and B-31
earth OK
OK: At 0C of engine coolant
temperature: 3.2 – 3.8 V Check the harness wire between
At 20C of engine coolant the engine coolant temperature
temperature: 2.3 – 2.9 V sensor and the engine-ECU, and
At 40C of engine coolant repair if necessary.
temperature: 1.3 – 1.9 V
At 80C of engine coolant
temperature: 0.3 – 0.9 V
OK
NG
Check the trouble symptoms. Replace the engine-ECU.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-16 MPI – Troubleshooting

Code No. 0120 Throttle position sensor system Probable cause

Range of Check  Malfunction of throttle position sensor
 Ignition switch: ON  Open or short circuit in the throttle position
 Excluding 2 seconds after the ignition switch is turned to ON or immediately sensor circuit or loose connector contact
after the engine starts.  Malfunction of the engine-ECU
Set Conditions
 Engine speed is 1,000 r/min or less, and intake air pressure is 48kPa or
less, TPS output voltage is 4.6 V or more for 2 seconds.
or
 The sensor output voltage is 0.2 V or less for 2 seconds.

OK
MUT-II Data list Intermittent malfunction
14 Throttle position sensor (Refer to GROUP 00 – Points to
OK: Refer to P.13B-65, DATA Note for Intermittent Malfunctions.)
LIST REFERENCE TABLE.
NG
NG
Check throttle position sensor. Replace
(Refer to P.13B-72*.)
OK
NG
Check the following connector: Repair
A-66
OK
(1) NG OK
Measure at throttle position sensor Measure at engine-ECU connector Check the following connector:
connector A-66. B-31. B-31
 Disconnect the connector and  Measure the voltage at the OK NG
measure at the harness side. engine-ECU connector terminal. Repair
(1) The voltage between terminal 1  Ignition switch: ON
and earth  The voltage between terminal 81 Check the harness wire between
(Ignition switch: ON) and earth the throttle position sensor and the
OK: 4.8 – 5.2 V OK: 4.8 – 5.2 V engine-ECU, and repair if necessary.
(2) Resistance between terminal 4 NG
and earth NG
OK: 2 Ω or less Check the following connector: Repair
B-31
OK
NG
Check the harness wire between Repair
the throttle position sensor and the
engine-ECU.
OK
NG
Check the trouble symptoms. Replace the engine-ECU.

(2) NG NG
Check the following connector: Repair
B-31
OK
OK
To the next page NG
Check the harness wire between Repair
the throttle position sensor and the
engine-ECU.
OK
NG
Check the trouble symptoms. Replace the engine-ECU.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 MPI – Troubleshooting 13B-17
From the previous page
OK
(1), (2) NG NG
Measure at throttle position sensor Check the following connector: Repair
connector A-66. B-31
 Use test harness (MB991536) to OK
connect the connector, and
measure at the pick-up harness. Check the harness wire between
 Ignition switch: ON throttle position sensor and the
(1) The voltage between terminal 1 engine-ECU.
and earth
OK: 4.8 – 5.2 V (3) NG
(2) The voltage between terminal 4 Adjust the throttle position sensor.
and earth (Refer to P.13B-65*.)
OK: 0.5 V or less
(3) The voltage between terminal 2 NG
Check the following connector: Repair
and earth
OK: Accelerator pedal fully re- B-31
leased: 0.3 – 1.0 V OK
Accelerator pedal fully de-
Check the harness wire between
pressed: 4.5 – 5.5 V
throttle position sensor and the
OK engine-ECU, and repair if necessary.
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-31. B-31
 Measure the voltage at the OK
engine-ECU terminal.
 Ignition switch: ON Check the harness wire between
 The voltage between terminal 84 throttle position sensor and the
and earth engine-ECU, and repair if necessary.
OK: Accelerator pedal fully re-
leased: 0.3 – 1.0 V OK NG
Accelerator pedal fully de- Check the following connector: Repair
pressed: 4.5 – 5.5 V B-31
OK

Check the trouble symptoms.

NG
Replace the engine-ECU.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-18 MPI – Troubleshooting

Code No. P0125 Feedback system Probable cause

Range of Check  Malfunction of oxygen sensor (front)
 The engine coolant temperature is approx. 80C or more.  Open or short circuit in the oxygen sensor (front)
 During stoichiometric feedback control circuit or loose connector contact
 The vehicle is not being decelerated.  Malfunction of engine-ECU
Set Conditions
 Oxygen sensor (front) output voltage has been higher or lower than 0.5 V
for at least thirty seconds.

NG
Check the following connector: Repair
A-55
OK
NG NG
Measure at oxygen sensor (front) Check the following connectors: Repair
connector A-55. B-31
 Disconnect the connector and
OK
measure at the harness side. NG
 Resistance between terminal 2 Check the harness wire between Repair
and earth the oxygen sensor (front) and the
OK: 2 Ω or less engine-ECU.
OK OK
Check the trouble symptoms.
NG

Replace the engine-ECU.

(1) NG NG
Measure at oxygen sensor (front) Check the following connector: Repair
connector A-55. B-31
 Use the test harness OK
(MD998464) to connect the
connector, and measure at the Check the harness wire between
pick-up harness side. the oxygen sensor (front) and the
 Engine: 2,500 r/min (after engine-ECU, and repair if necessary.
warming up)
(1) Voltage between terminal 2 and (2) NG NG
earth Check the oxygen sensor (front). Replace
OK: 0.5 V or less (Refer to P.13B-80.)
(2) Voltage between terminal 4 and OK
earth NG
OK: 0 V and 0.8 V alternate. Check the following connector: Repair
B-31
OK
OK

Check the harness wire between

the oxygen sensor (front) and the
engine-ECU, and repair if necessary.

NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-31. B-31
 Measure the voltage at the
OK
engine-ECU terminal.
 Engine: 2,500 r/min (after Check the harness wire between
warming up) the oxygen sensor (front) and the
 Voltage between terminal 76 and engine-ECU, and repair if necessary.
earth
OK: 0 V and 0.8 V alternate.
OK
NG
Check the following connector: Repair
B-31
OK
OK
Check the trouble symptoms. Transient malfunction
NG (Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
Replace the engine-ECU.
 MPI – Troubleshooting 13B-19
Code No. P0130 Oxygen sensor (front) system Probable cause
<sensor 1>
Range of Check  Malfunction of oxygen sensor (front)
 Three minutes have been passed since the engine has been started.  Open or short circuit in the oxygen sensor (front)
 The engine coolant temperature is approx. 80C or more. circuit or loose connector contact
 Intake air temperature is 20 – 50C  Malfunction of engine-ECU
 Engine speed is 1,200 r/min or more
 Driving on a level surface at constant speed.
Set Conditions
 The oxygen sensor (front) output voltage is 4.5 V or more when the sensor
output voltage is 0.2 V or less and a voltage of 5 V is applied to the
oxygen sensor (front) inside the engine-ECU.
Range of Check
 Engine speed is 2,800 r/min or less
 During driving
 During air/fuel ratio feedback control
Set Conditions
 The oxygen sensor (front) output frequency is six or less per 10 seconds
on average.
13B-20 MPI – Troubleshooting

NG
Check the following connector: Repair
A-55
OK
NG NG
Measure at oxygen sensor (front) Check the following connector: Repair
connector A-55. B-31
 Disconnect the connector and OK
measure at the harness side. NG
 Resistance between terminal 2 Check the harness wire between Repair
and earth the oxygen sensor (front) and the
OK: 2 Ω or less engine-ECU.
OK OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
(1) NG NG
Measure at oxygen sensor (front) Check the following connector: Repair
connector A-55. B-31
 Use the test harness OK
(MD998464) to connect the
connector, and measure at the Check the harness wire between
pick-up harness side. the oxygen sensor (front) and the
 Engine: 2,500 r/min (after engine-ECU, and repair if necessary.
warming up)
(1) Voltage between terminal 2 and (2) NG NG
earth Check the oxygen sensor (front). Replace
OK: 0.5 V or less (Refer to P.13B-80.)
(2) Voltage between terminal 4 and OK
earth NG
OK: 0 V and 0.8 V alternate. Check the following connector: Repair
B-31
OK
OK

Check the harness wire between

the oxygen sensor (front) and the
engine-ECU, and repair if necessary.
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-31. B-31
 Measure the voltage at the
engine-ECU terminal. OK
 Engine: 2,500 r/min (after Check the harness wire between
warming up) the oxygen sensor (front) and the
 Voltage between terminal 76 and engine-ECU, and repair if necessary.
earth
OK: 0 V and 0.8 V alternate.
OK
NG
Check the following connector: Repair
B-31
OK
OK
Check the trouble symptoms. Transient malfunction
NG (Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
Replace the engine-ECU.
 MPI – Troubleshooting 13B-21
Code No. P0135 Oxygen sensor heater (front) system Probable cause
<sensor 1>
Range of Check  Malfunction of oxygen sensor heater (front)
 The engine coolant temperature is approx. 20C or more.  Open or short circuit in the oxygen sensor heater
 The oxygen sensor heater (front) remains on. (front) circuit or loose connector contact
 The engine speed is 50 r/min or more.  Malfunction of engine-ECU
 Battery voltage is 11 – 16 V.
Set Conditions
 The current, which flows through the oxygen sensor heater (front), is 0.2 A
or less or 3.5 A or more for six seconds.

NG
Measure at oxygen sensor (front) Replace
connector A-55.
 Disconnect the connector and
measure at the harness side.
 Resistance between terminals 1
and 3
OK: 4.5 – 8.0 Ω
OK
NG
Check the following connector: Repair
A-55
OK
NG NG
Measure at oxygen sensor (front) Check the following connector: Repair
connector A-55. B-26
 Disconnect the connector and OK
measure at the harness side.
 Ignition switch: ON Check the harness wires between
 Voltage between terminal 1 and the oxygen sensor (front) and the
earth engine control relay, and repair if
OK: System voltage necessary.
OK
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-30. B-30
 Measure the voltage at the OK
engine-ECU terminal.
 Ignition switch: ON Check the harness wire between NG
 Voltage between terminal 60 and the oxygen sensor (front) and the Repair
earth engine-ECU, and repair if necessary.
OK: System voltage
OK
OK
Replace the engine-ECU.
NG
Check the following connector: Repair
B-30
OK
NG
Check the harness wires between Repair
the oxygen sensor (front) and the
engine-ECU and between the
oxygen sensor (front) and the
engine control relay.
OK
OK
Check the trouble symptoms. Transient malfunction
(Refer to GROUP 00 – Points to
NG Note for Intermittent Malfunctions.)
Replace the engine-ECU.
13B-22 MPI – Troubleshooting

Code No. P0136 Oxygen sensor (rear) system Probable cause

<sensor 2>
Range of Check  Malfunction of oxygen sensor (rear)
 Three minutes have been passed since the engine has been started.  Open or short circuit in the oxygen sensor (rear)
 The engine coolant temperature is approx. 80C or more. circuit or loose connector contact
 Intake air temperature is 20 – 50C  Malfunction of engine-ECU
 Engine speed is 1,200 r/min or more
 Driving on a level surface at constant speed.
Set Conditions
 The oxygen sensor (rear) output voltage is 4.5 V or more when the sensor
output voltage is 0.2 V or less and a voltage of 5 V is applied to the
oxygen sensor (rear) inside the engine-ECU.
Range of Check
 Two seconds have passed after the ECU detected an open circuit.
 When the oxygen sensor (front) is in good condition.
Set Conditions
 When the air/fuel ratio is rich, the oxygen sensor (front) output voltage is
0.5 V or more, the oxygen sensor (rear) output voltage is less than 0.1 V,
and the oxygen sensor (rear) output voltage fluctuates within 0.078 V.
 MPI – Troubleshooting 13B-23
NG
Check the following connector: Repair
B-90
OK
NG NG
Measure at oxygen sensor (rear) Check the following connector: Repair
connector B-90. B-31
 Disconnect the connector and OK
measure at the harness side. NG
 Resistance between terminal 2 Check the harness wire between Repair
and earth the oxygen sensor (rear) and the
OK: 2 Ω or less engine-ECU.
OK OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
(1) NG NG
Measure at oxygen sensor (rear) Check the following connector: Repair
connector B-90. B-31
 Measure the voltage at the OK
oxygen sensor (rear) terminal
 Engine: 2,500 r/min (after Check the harness wire between
warming up) the oxygen sensor (rear) and the
(1) Voltage between terminal 2 and engine-ECU, and repair if necessary.
earth
OK: 0.5 V or less (2) NG NG
(2) Voltage between terminal 1 and Check the oxygen sensor (rear). Replace
earth (Refer to P.13B-80.)
OK: 0 V and 0.8 V alternate. OK
NG
OK Check the following connector: Repair
B-31
OK
Check the harness wire between
the oxygen sensor (rear) and the
engine-ECU, and repair if necessary.
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-31. B-31
 Measure the voltage at the OK
engine-ECU terminal.
 Engine: 2,500 r/min (after Check the harness wire between
warming up) the oxygen sensor (rear) and the
 Voltage between terminal 75 and engine-ECU, and repair if necessary.
earth
OK: 0 V and 0.8 V alternate.
OK
NG
Check the following connector: Repair
B-31
OK
OK
Check the trouble symptoms. Transient malfunction
NG (Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
Replace the engine-ECU.
13B-24 MPI – Troubleshooting

Code No. P0141 Oxygen sensor heater (rear) system Probable cause
<sensor 2>
Range of Check  Malfunction of oxygen sensor heater (rear)
 The engine coolant temperature is approx. 20C or more.  Open or short circuit in the oxygen sensor heater
 The oxygen sensor heater (rear) remains on. (rear) circuit or loose connector contact
 The engine speed is 50 r/min or more.  Malfunction of engine-ECU
 Battery voltage is 11 – 16 V.
Set Conditions
 The current, which flows through the oxygen sensor heater (rear), is 0.2 A
or less or 3.5 A or more for six seconds.

NG
Measure at oxygen sensor (rear) Replace
connector B-90.
 Disconnect the connector and
measure at the harness side.
 Resistance between terminals 3
and 4
OK: 11 – 18 Ω
OK
NG
Check the following connector: Repair
B-90
OK
NG NG
Measure at oxygen sensor (rear) Check the following connector: Repair
connector B-90. B-26
 Disconnect the connector and OK
measure at the harness side.
 Ignition switch: ON Check the harness wires between
 Voltage between terminal 3 and the oxygen sensor (rear) and the
earth engine control relay, and repair if
OK: System voltage necessary.
OK
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-30. B-30
 Measure the voltage at the
OK
engine-ECU terminal.
 Ignition switch: ON Check the harness wire between
 Voltage between terminal 54 and the oxygen sensor (rear) and the
earth engine-ECU, and repair if necessary.
OK: System voltage
OK
NG
Check the following connector: Repair
B-30
OK
NG
Check the harness wires between Repair
the oxygen sensor (rear) and the
engine-ECU, and between the
oxygen sensor (rear) and the engine
control relay.
OK
OK
Check the trouble symptoms. Transient malfunction
(Refer to GROUP 00 – Points to
NG Note for Intermittent Malfunctions.)
Replace the engine-ECU.
 MPI – Troubleshooting 13B-25
Code No. P0170 Abnormal fuel system Probable cause
Range of Check  Incorrect fuel pressure
 Engine: Being learning the air-fuel ratio  Malfunction of injector
Set Conditions  Malfunction of oxygen sensor (front)
 Two seconds or more have been passed while the fuel injection amount  Malfunction of intake air temperature sensor
compensation value is too low.  Malfunction of vacuum sensor
or  Malfunction of engine-ECU
 Two seconds or more have been passed while the fuel injection amount
compensation value is too high.

NG
MUT-II Data list Check the intake air temperature sensor system
13 Intake air temperature sensor (Refer to P.13B-65.) (Refer to P.13B-12, INSPECTION PROCEDURE FOR DIAGNOS-
OK TIC TROUBLE CODE P0110.)
NG
MUT-II Data list Check the engine coolant temperature sensor system
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNOS-
TIC TROUBLE CODE P0115.)
OK
NG
MUT-II Data list Check the vacuum sensor system
32 Vacuum sensor (Refer to P.13B-65.) (Refer to P.13B-10, INSPECTION PROCEDURE FOR DIAGNOS-
TIC TROUBLE CODE P0105.)
OK
NG
Check the injector (Refer to P.13B-74*.) Replace
OK
NG
Check the following connectors: A-48, A-49, A-54, A-60 Repair
OK
NG
Check the harness wire between the engine-ECU and the Repair
injector connector.
OK

Check the fuel pressure (Refer to P.13B-67*.)

OK
More than zero NG
MUT-II Data list Check if air was drawn Repair
81 Long-term fuel compensation (Refer to P.13B-65.) into the intake system.
 Is fuel trim more or less than zero? OK
Less than zero
 Check for clogging of the injector.
 Check for fuel leaks from injector.  Check for clogging of the fuel filter and fuel line.
 Check for entry of foreign matter (water, kerosene, etc.) into  Check the fuel pump (insufficient discharge rate).
the fuel.  Check for exhaust leaks (oxygen sensor installation section,
cracks in exhaust manifold, cracks in front pipe, etc.).
OK  Check for entry of foreign matter (water, kerosene, etc.) into
Replace the engine-ECU. the fuel.
OK
Replace the engine-ECU.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-26 MPI – Troubleshooting

Code No. P0201 No. 1 injector system Probable cause

Code No. P0202 No. 2 injector system
Code No. P0203 No. 3 injector system
Code No. P0204 No. 4 injector system
Range of Check  Malfunction of the injector
 Engine speed is approx. 50 – 1,000 r/min  Improper connector contact, open circuit or
 The throttle position sensor output voltage is 1.15 V or less. short-circuited harness wire of the injector circuit
 Actuator test by MUT-II is not carried out.  Malfunction of the engine-ECU
Set Conditions
 Surge voltage of injector coil is not detected for 2 seconds.

OK
MUT-II Actuator Test Intermittent malfunction
01 No. 1 injector (Refer to GROUP 00 – Points to Note for Intermittent Malfunctions.)
02 No. 2 injector
03 No. 3 injector
04 No. 4 injector
OK: The idling condition should change
NG
NG
Check the following connectors: Repair
A-48, A-49, A-54, A-60
OK
NG
Check the injector. (Refer to P.13B-74*.) Replace
OK
NG
Measure at the injector connectors A-48, A-49, A-54, A-60. Check the harness wire between the engine control relay and
 Disconnect the connector, and measure at the harness side. the injector connector, and repair if necessary.
 Voltage between 1 and earth (Ignition switch: ON)
OK: System voltage
OK
NG
Check the following connector: B-28 Repair
OK
NG
Measure at the engine-ECU connector B-28. Check the harness wire between the engine-ECU and the injector
 Disconnect the connector, and measure at the harness side. connector, and repair if necessary.
 Voltage between 1, 2, 14, 15 and earth (Ignition switch: ON)
OK: System voltage
OK
Check trouble symptoms.
NG
OK
Use an analyzer to measure the signal wave form at injector Intermittent malfunction
connectors A-48, A-49, A-54, A-60. (Refer to GROUP 00 – Points to Note for Intermittent Malfunctions.)
 Connect the connector using test harness (MB991348), and
measure at pick-up harness.
 Engine: Idling
 The voltage between terminal 2 and earth
OK: A normal waveform should be displayed as described
on P.13B-59* (INSPECTION PROCEDURE USING AN
ANALYZER).
NG

Replace the engine-ECU.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 13B-27
Code No. P0300 Random cylinder misfire detected Probable cause
Range of Check  Malfunction of the ignition system
 Engine speed is approx. 50 – 4,500 r/min.  Abnormal compression
 When the engine is running except deceleration and sudden acceleration  Malfunction of injector
Set Conditions  Abnormal signal from the crank angle sensor
 The number of misfire exceeds a predetermined number per 200 engine  Malfunction of the lambda control system
revolutions.  Malfunction of the engine coolant temperature
 The number of misfire exceeds a predetermined number per 1,000 engine sensor
revolutions.  Missing timing belt teeth
 Malfunction of the EGR valve
 Malfunction of engine-ECU

MUT-II Data list NG Check the crankshaft positron sensor system. (Refer to
22 Crankshaft position sensor (Refer to P.13B-65.) P.13B–31, INSPECTION PROCEDURE FOR DIAGNOSIS
 Crankshaft position sensor wave form check CODE P0335.)
 Engine speed: stable
OK: Constant pulse range
OK
NG
Check the injector (Refer to P.13B-74*.) Replace
OK
NG
Check the following connectors: A-48, A-49, A-54, A-60, Repair
B–28
OK
NG Repair
Check the harness wire between the engine-ECU and the
injector connector
OK
NG
MUT-II Data list
81 Long-term fuel compensation (Refer to P.13B-65.)
NG

MUT-II Data list NG Check the abnormal fuel system (Refer to P.13B-25,
82 Short-term fuel compensation (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE
OK P0170.)

MUT-II Data list NG Check the engine coolant temperature sensor system (Refer
21 Engine coolant temperature sensor (Refer to P.13B-65.) to P.13B-13, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE P0115.)
NG

Check the following items:

 Check the ignition coil, spark pugs, spark plug cables.
 Check the compression pressure.
 Check the timing belt for missing teeth.
 Check the EGR system and EGR valve.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-28 MPI – Troubleshooting

Code No. P0301 No. 1 cylinder misfire detected Probable cause

Code No. P0302 No. 2 cylinder misfire detected
Code No. P0303 No. 3 cylinder misfire detected
Code No. P0304 No. 4 cylinder misfire detected
Range of Check  Malfunction of the ignition system
 The engine speed is 500 – 4,500 r/min.  Abnormal compression
 While the engine is running except deceleration and sudden acceleration.  Malfunction of injector
Set Conditions  Malfunction of engine-ECU
 The number of misfires exceeds a predetermined number per 200 engine
revolutions (Misfire has occurred in only one cylinder).
or
 The number of misfires exceeds a predetermined number per 1,000 engine
revolutions (Misfire has occurred in only one cylinder).

Check the following connectors: NG

A-89, A-91 Repair
OK
(1) NG NG
Measure at ignition coil connectors Check the following connector: Repair
A-89, A-91. A-96
 Disconnect the connector and
OK
measure at the harness side.
(1) The voltage between terminal 1 Check the ignition failure sensor NG
and earth (Refer to GROUP 16 – Ignition Replace
(Ignition switch: ON) System.)
OK: System voltage
(2) The voltage between terminal 3 OK
and earth
(Engine: Cranking) Check the harness wire between the
OK: 0.5 – 4.0 V ignition coil and the ignition failure
(3) The resistance between terminal sensor, and between the ignition coil
2 and earth and the ignition failure sensor.
OK: 2 Ω or less
(2) NG Check the following connector: NG
B-28 Repair

OK
Check the harness wire between NG
the ignition coil and the Repair
(3) NG engine-ECU.
OK
NG
Check the trouble symptoms. Replace the engine-ECU.
OK

Check the ignition coil (Refer to Check the harness wire between
GROUP 16 – Ignition System.) the ignition coil and the earth, and
repair if necessary.

Check the spark plugs. NG

Replace
OK
Check the injector (Refer to
NG
P.13B–74*.) Replace
OK
Check the following connectors:
NG
A-48, A-49, A-54, A–60, B-28 Repair
OK
Check the harness wire between
NG
the injector and the engine-ECU. Repair
OK
Check the compression pressure. NG
(Refer to GROUP 11B – On-vehicle Repair
Service.)
OK
NG
Check the trouble symptoms. Replace the engine-ECU.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 MPI – Troubleshooting 13B-29
Code No. P0325 Detonation sensor system Probable cause
Range of Check  Malfunction of the detonation sensor
 Engine: Two seconds after the engine has been started  Open or short circuit in the detonation sensor
Set Conditions circuit or loose connector contact
 Changes in sensor output voltage (detonation sensor peak voltage per 1/2  Malfunction of engine-ECU
crankshaft rotation) in 200 consecutive cycles are 0.06 V or less.

NG
Check the following connector: A-50 Repair
OK
NG
Measure at the detonation sensor connector A-50. Check the harness wire between the detonation sensor and
 Disconnect the connector and measure at the harness earth, and repair if necessary.
side.
 The resistance between terminal 2 and earth
OK: 2 Ω or less
OK
NG
Check the following connector: B-31 Repair
OK
NG
Check the harness wire between the detonation sensor and Repair
the engine-ECU.
OK
OK
Check the trouble symptoms. Intermittent malfunction
NG (Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions.)
Replace the detonation sensor.

Check the trouble symptoms.

NG

Replace the engine-ECU.

Code No. P0335 Crank angle sensor system Probable cause

Range of Check  Malfunction of the crank angle sensor.
 Engine is cranking  Open or short circuit in the crank angle sensor
Set Conditions circuit or loose connector contact.
 Sensor output voltage does not change for 2 seconds (no pulse signal  Malfunction of engine-ECU
input).
13B-30 MPI – Troubleshooting

OK
MUT-II Data list Intermittent malfunction
22 Crank angle sensor (Refer to GROUP 00 – Points to
OK: Refer to P.13B-65, DATA Note for Intermittent Malfunctions.)
LIST REFERENCE TABLE.
NG
NG
Check the following connector: Repair
A-94
OK
(1) NG
Measure at the crank angle sensor Check the harness between the
connector A-94. crank angle sensor and earth, and
 Disconnect the connector and repair if necessary.
measure at the harness side.
(1) The resistance between terminal (2) NG OK
Measure at engine-ECU connector Check the following connector:
1 and earth B-31. B-31
OK: 2 Ω or less  Measure the voltage at the
(2) The voltage between terminal 2 OK NG
engine-ECU terminal. Repair
and earth  Disconnect the connector A-94
(Ignition switch: ON)  Ignition switch: ON
OK: 4.8 – 5.2 V Check the harness wire between
 The voltage between terminal 89
(3) The voltage between terminal 3 the crank angle sensor and the
and earth.
and earth engine-ECU, and repair if necessary.
OK: 4.8 – 5.2 V
(Ignition switch: ON)
OK: System voltage NG
NG
Check the following connector: Repair
B-31
OK
NG
Check the harness wire between Repair
the crank angle sensor and the
engine-ECU.
OK
NG
Check the trouble symptoms. Replace the engine-ECU.

(3) NG NG
Check the following connector: Repair
B-26
OK
Check the harness wire between
OK the crank angle sensor and the
engine control relay, and repair if
necessary.
NG NG
Use an analyzer to measure the Check the crank angle sensor vane Replace
output waveform at the crank angle OK
sensor connector A-94.
 Use the test harness Replace the crank angle sensor.
(MD998478) to connect the
connector, and measure at the
pick-up harness side. Check the trouble symptoms.
 Engine: Idling
 The voltage between terminal 2 NG
and earth NG
Check the following connectors: Repair
OK: A normal waveform should
be displayed as described B-26, B-31
on P.13B-72 (Inspection OK
Procedure Using an Ana-
lyzer). Its maximum value Check the harness wires between
should be 4.8 V or more, the crank angle sensor and the
and its minimum value engine-ECU, crank angle sensor
should be 0.6 V or less and the engine control relay, and
with no noise in waveform. the crank angle sensor and earth.
Then, repair if necessary.
OK

Check the trouble symptoms.

NG
Replace the engine-ECU.
 MPI – Troubleshooting 13B-31
Code No. P0340 Camshaft position sensor system Probable cause
Range of Check  Malfunction of the camshaft position sensor
 After the engine was started  Open or short circuit in the camshaft position
Set Conditions sensor circuit or loose connector contact.
 The sensor output voltage does not change for 2 seconds (no pulse signal  Malfunction of engine-ECU
input).

NG
Check the following connector: Repair
A-81
OK
(1) NG NG
Measure at camshaft position Check the following connector: Repair
sensor connector A-81. B-26
 Disconnect the connector and
OK
measure at the harness side.
(1) The voltage between terminal 3 Check the harness wire between
and earth the camshaft position sensor
(Ignition switch: ON) connector and the engine control
OK: System voltage relay, and repair if necessary.
(2) The voltage between terminal 2
and earth (2) NG
OK
(Ignition switch: ON) Measure at engine-ECU connector Check the following connector:
OK: 4.8 – 5.2 V B-31. B-31
(3) The resistance between terminal  Measure the voltage at the
engine-ECU terminal. OK NG
1 and earth Repair
OK: 2 Ω or less  Disconnect connector A-81.
 Ignition switch: ON Check the harness wire between
 The voltage between terminal 88 the camshaft position sensor
and earth connector and the engine-ECU, and
OK: 4.8 – 5.2 V repair if necessary.
NG
NG
Check the following connector: Repair
B-31
OK
NG
Check the harness wire between Repair
the camshaft position sensor
connector and the engine-ECU.
OK
OK NG
Check the trouble symptoms. Replace the engine-ECU.
(3) NG
Check the harness wire between
the camshaft position sensor
connector and earth, and repair if
necessary.
Use an analyzer to measure the NG NG
output waveform at camshaft Check the camshaft position sensing Replace
position sensor connector A-81. cylinder.
 Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness. Check the trouble symptoms.
 Engine: Idling NG
 The voltage between terminal 2
and earth Replace the camshaft position
OK: A normal waveform should sensor.
be displayed as described OK
on P.13B-72 (Inspection NG
Procedure Using an Ana- Check the following connectors: Repair
lyzer), its maximum value B-26, B-31
should be 4.8 V or more,
OK
and its minimum value
should be 0.6 V or less Check the harness wires between the camshaft position sensor connector and the
with no noise in waveform. engine-ECU, the camshaft position sensor connector and the engine control relay, and
the camshaft position sensor connector and earth. Then, repair if necessary.
OK
OK
Check the trouble symptoms. Intermittent malfunction
NG (Refer to GROUP 00 – Points to Note for Intermittent Malfunctions.)

Replace the engine-ECU.

13B-32 MPI – Troubleshooting

Code No. P0403 EGR control solenoid valve system Probable cause
Range of Check  Malfunction of the EGR control solenoid valve
 Ignition switch: ON  Open or short circuit in the EGR control solenoid
 Battery voltage is 10 V or more. valve circuit or loose connector contact
Set Conditions  Malfunction of engine-ECU
 The solenoid coil surge voltage (battery voltage + 2 V) is not detected
when the EGR control solenoid valve is turned from on to off.

OK
MUT-II Actuator Test Intermittent malfunction
10 EGR control solenoid valve (Refer to GROUP 00 – Points to
OK: Operating sound can be Note for Intermittent Malfunctions.)
heard and the valve vibrates.
NG
NG
Measure at the EGR control Replace
solenoid valve connector A-61.
 Disconnect the connector, and
measure at the solenoid valve
side.
 The resistance between
terminals 1 and 2
OK: 28 – 36 Ω (at 20C)
OK
NG
Check the following connector: Repair
A-61
OK
NG
Check the following connector: NG
Measure at the EGR control Repair
solenoid valve connector A-61. B-26
 Disconnect the connector and NG
measure at the harness side.
 Ignition switch: ON Check the harness wire between
 The voltage between terminal 1 the EGR control solenoid valve and
and earth the engine control relay, and repair
OK: System voltage if necessary.

OK
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-28. B-28
 Measure the voltage at the
OK
engine-ECU terminal.
 Ignition switch: ON Check the harness wire between NG
Repair
 The voltage between terminal 6 the EGR control solenoid valve and
and earth the engine-ECU.
OK: System voltage
OK
OK
Replace the engine-ECU.
NG
Check the following connectors: Repair
B-26, B-28
OK
NG
Check the harness wires between Repair
the EGR control solenoid valve and
the engine control relay, and
between the EGR control solenoid
valve and the engine-ECU.
OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

 MPI – Troubleshooting 13B-33
Code No. P0421 Catalyst malfunction Probable cause
Range of Check  Malfunction of catalyst
 The engine speed is 4,000 r/min or less.  Malfunction of the oxygen sensor (front)
 During driving  Malfunction of the oxygen sensor (rear)
 During air/fuel ratio feedback control  Malfunction of engine-ECU
Set Conditions
 The ratio between the oxygen sensor (rear) and the oxygen sensor (front)
output frequencies reaches 0.8 per 10 seconds on average.

NG
Check the exhaust manifold. (Are there any cracks?) Repair
OK

NG
MUT-II Data list Check the oxygen sensor (rear) system <sensor 2>
59 Oxygen sensor (rear) (Refer to P.13B-22, INSPECTION PROCEDURE FOR
 Transmission: 2nd DIAGNOSTIC TROUBLE CODE P0136.)
 Drive with wide open throttle
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system <sensor 1>
11 Oxygen sensor (front) (Refer to P.13B-19, INSPECTION PROCEDURE FOR
OK: 600 – 1,000 mV when racing suddenly DIAGNOSTIC TROUBLE CODE P0130.)
OK
NG
MUT-II Data list Replace the oxygen sensor (front).
11 Oxygen sensor (front)
 Transmission: 2nd
OK: Changeover between 0 – 400 mV and 600 – 1,000
mV occur 15 times in 10 seconds.
OK

Replace the oxygen sensor (rear).

Check the trouble symptoms.

NG

Replace the catalytic converter.

Check the trouble symptoms.

NG

Replace the engine-ECU.

13B-34 MPI – Troubleshooting

Code No. P0443 Purge control solenoid valve system Probable cause
Range of Check  Malfunction of the purge control solenoid valve
 Ignition switch: ON  Open or short circuit in the purge control solenoid
 Battery voltage is 10 V or more. valve circuit or loose connector contact
Set Conditions  Malfunction of engine-ECU
 The solenoid coil surge voltage (battery voltage + 2 V) is not detected
when the purge control solenoid valve is turned from on to off.

MUT-II Actuator Test OK Intermittent malfunction

08 Purge control solenoid valve (Refer to GROUP 00 – Points to
OK: Operating sound can be Note for Intermittent Malfunctions.)
heard and the valve vi-
brates.
NG
NG
Measure at the purge control Replace
solenoid valve connector A-58.
 Disconnect the connector, and
measure at the solenoid valve
side.
 The resistance between
terminals 1 and 2
OK: 28 – 36 Ω (at 20C)
OK
NG
Check the following connector: Repair
A-58
OK
NG
Check the following connector: NG
Measure at the purge control Repair
solenoid valve connector A-58. B-26
 Disconnect the connector and NG
measure at the harness side.
 Ignition switch: ON Check the harness wire between
 The voltage between terminal 2 the purge control solenoid valve and
and earth the engine control relay, and repair
OK: System voltage if necessary.

OK
NG NG
Measure at engine-ECU connector Check the following connector: Repair
B-28. B-28
 Measure the voltage at the
OK
engine-ECU terminal.
 Ignition switch: ON Check the harness wire between NG
Repair
 The voltage between terminal 9 the purge control solenoid valve and
and earth the engine-ECU.
OK: System voltage
OK
OK
Replace the engine-ECU.
NG
Check the following connectors: Repair
B-26, B-28
OK
NG
Check the harness wires between Repair
the purge control solenoid valve and
the engine control relay, and
between the purge control solenoid
valve and the engine-ECU.
OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

 MPI – Troubleshooting 13B-35
Code No. P0500 Vehicle speed sensor system Probable cause
Range of Check  Malfunction of the vehicle speed sensor
 Engine: Two seconds after the engine was started  Open or short circuit in the vehicle speed sensor
 Idle switch: OFF circuit or loose connector contact
 Engine speed: 2,500 r/min or more  Malfunction of engine-ECU
 During high engine load
Set Conditions
 The sensor output voltage does not change for 2 seconds (no pulse signal
input).

NO
Does the speedometer operate normally? Check the vehicle speed sensor
YES (Refer to GROUP 54 – Combination Meter.)

NG
Use an analyzer to measure the output waveform of the Check the following connectors: B-19, B-31
vehicle speed sensor at engine-ECU connector B-31. OK NG
 Driving the vehicle
 The voltage between terminal 86 and earth Repair
OK: A normal waveform should be displayed as de-
scribed in OSCILLOSCOPE INSPECTION PROCE- Check the harness wire between intermediate connector B-19
DURE, and noise should not be displayed in the and the engine-ECU, and repair if necessary.
waveform. (Refer to GROUP 23 – Troubleshooting.)
OK
NG
Check the following connector: B-31 Repair
OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

13B-36 MPI – Troubleshooting

Code No. P0505 Idle speed control (ISC) system Probable cause
Check Area  Malfunction of idle speed control (ISC) servo
 Vehicle speed has reached 1.5 km/h at least once.  Improper connector contact, open circuit or
 Under the closed loop idle speed control. short-circuited harness wire
Judgment Criteria  Malfunction of the engine-ECU
 Actual idle speed has continued to be higher than the target idle speed by
300 r/min or more for 10 sec.
Check Area
 Vehicle speed has reached 1.5 km/h at least once.
 During idle speed closed loop control.
 The highest temperature at the last drive is 45C or less.
 Engine coolant temperature is approx. 80C or more.
 Battery voltage is 10 V or more.
 Intake air temperature is –10C (14F) or more.
Judgment Criteria
 Actual idle speed has been minimum 200 r/min higher than the target idle
speed for ten seconds.
Check Area
 During idle speed closed loop control.
 Engine coolant temperature is about 80C or higher.
 Battery voltage is 10 V or higher.
 Power steering switch is off.
 Intake air pipe pressure is 53 kPa or less.
 Intake air temperature is –10C or more.
Judgment Criteria
 Actual idle speed has been minimum 100 r/min higher than the target idle
speed for ten seconds.
 MPI – Troubleshooting 13B-37
YES
MUT-II Self-Diag Code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Is any diagnosis code other than No. P0505 output? CODES.
NO
NG
Check intake air hose and intake manifold for air intake. Repair
OK

Check the throttle body (around the throttle valve) for NG

Clean around the throttle valve. (Refer to P.13B-90*.)
contamination.
OK
NG
Check the idle speed control (ISC) servo. Replace
(Refer to P.13B-75*.)
OK
NG
Check the following connector: A-67 Repair
OK
NG
Measure at the idle speed control servo connector A-67. Check the following connector: B-26
 Disconnect the connector, and measure at the harness OK
side.
 Ignition switch: ON
 The voltage between terminal 2 and earth Check the harness wire between the engine control relay and
 The voltage between terminal 5 and earth the idle speed control servo, and repair if necessary.
OK: System voltage
OK
NG
Measure at engine-ECU connector B-28. Check the following connector: A-67
 Connect the connector using test harness (MB991709), OK NG
and measure at pick-up harness.
 The voltage between terminal 4 and earth Repair
 The voltage between terminal 5 and earth
 The voltage between terminal 17 and earth Check the harness wire between the idle speed control servo
 The voltage between terminal 18 and earth and the engine–ECU.
OK: The voltage changes as follows for three seconds
when the ignition switch is turned ON. OK NG
(When using a circuit tester)
5 V and 8 V alternates Repair
(When using an analyzer)
1 V or less and system voltage alternates Replace the engine-ECU.
OK
NG
Check the following connector: B-26, B-28 Repair
OK
NG
Check the harness wire between the engine control relay and Repair
the idle speed control servo, and between the idle speed
control servo and the engine-ECU.
OK
OK
Check the trouble symptoms. Intermittent malfunction (Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
NG

Replace the engine-ECU.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-38 MPI – Troubleshooting

Cord No. P1610 Immobilizer system Probable cause

Range of Check  Open or short circuit, or loose connector contact
 Ignition switch: ON  Malfunction of the immobilizer-ECU
Set Conditions  Malfunction of the engine-ECU
 Improper communication between the engine-ECU and the immobilizer-ECU

NOTE
(1) If the registered ignition keys are close each other when starting the engine, radio interference may
cause this code to be displayed.
(2) This code may be displayed when registering the key ID code.
NG
Check the following connectors: Repair
B-19, B-30, B-36
OK
NG
Check the harness wire between Replace
the immobilizer-ECU and the
engine-ECU.
OK

Check the trouble symptoms.

NG

Replace the immobilizer-ECU.

Check the trouble symptoms.

NG

Replace the engine-ECU.

 MPI – Troubleshooting 13B-39
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom Inspection Reference page
procedure
No.

Communication Communication with all systems is not possible. 1 13B-40

with MUT-II is
impossible. Communication with engine-ECU only is not possible. 2 13B-40

Engine warning The engine warning lamp does not illuminate right after the 3 13B-41
lamp and ignition switch is turned to the ON position.
related parts
The engine warning lamp remains illuminating and never goes 4 13B-41
out.

Starting No initial combustion (starting impossible) 5 13B-42

Initial combustion but no complete combustion 6 13B-43

(starting impossible)

Long time to start (improper starting) 7 13B-44

Idling stability Unstable idling (Rough idling, hunting) 8 13B-45

(Improper idling)
Idling speed is high. (Improper idling speed) 9 13B-47

Idling speed is low. (Improper idling speed) 10 13B-47

Idling stability When the engine is cold, it stalls at idling. (Die out) 11 13B-48
(Engine stalls)
When the engine becomes hot, it stalls at idling. (Die out) 12 13B-49

The engine stalls when starting the car. (Pass out) 13 13B-51

The engine stalls when decelerating. 14 13B-51

Driving Hesitation, sag or stumble 15 13B-52

The feeling of impact or vibration when accelerating 16 13B-53

The feeling of impact or vibration when decelerating 17 13B-53

Poor acceleration 18 13B-54

Surge 19 13B-55

Knocking 20 13B-56

Dieseling 21 13B-56

Too high CO and HC concentration when idling 22 13B-57

Fans (radiator fan, A/C condenser fan) are inoperative 23 13B-58

13B-40 MPI – Troubleshooting

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

INSPECTION PROCEDURE 1
Communication with MUT-II is not possible. Probable cause
(Communication with all systems is not possible.)
The cause is probably a defect in the power supply system (including earth) for  Malfunction of the connector
the diagnosis line.  Malfunction of the harness wire

NG NG
Measure at the diagnosis connector Check the following connectors: Repair
(16-pin) B-35. B-75, B-81
 Voltage between 16 and earth
OK
OK: Battery voltage
NG
OK Check trouble symptom. Check the harness wire between the
power supply and diagnostic connector
(16-pin), and repair if necessary.

NG
Measure at the diagnosis connector Check the harness wire between the
(16-pin) B-35. diagnostic connector (16-pin) and
 Continuity between 4 and earth earth, and repair if necessary.
 Continuity between 5 and earth
OK: Continuity
OK

Replace the MUT-II.

INSPECTION PROCEDURE 2
MUT-II communication with engine-ECU is impossible. Probable cause
One of the following causes may be suspected:  Malfunction of engine-ECU power supply circuit
 No power supply to engine-ECU.  Malfunction of engine-ECU
 Defective earth circuit of engine-ECU.  Open circuit between engine-ECU and diagnosis
 Defective engine-ECU. connector
 Improper communication line between engine-ECU and MUT-II

Check the following connectors: B-09, B-19, B-30, B-35, B-60X, NG

B-61X Repair
OK

Check trouble symptom.

NG
OK NG
Check the harness wire between engine-ECU and diagnosis con- Check the harness wire Repair
nector. between engine-ECU
NG and earth.
OK
Repair
Check the power supply and ignition switch-IG system.
(Refer to P.13B-41, INSPECTION PROCEDURE 25.)

NOTE
Though the above inspection has been performed, if trouble symptom does not disappear, check the multi
center display, and replace it if necessary.
 MPI – Troubleshooting 13B-41
INSPECTION PROCEDURE 3
The engine warning lamp does not illuminate right after Probable cause
the ignition switch is turned to the ON position.
Because there is a burnt-out bulb, the engine-ECU causes the engine warning lamp  Burnt-out bulb
to illuminate for five seconds immediately after the ignition switch is turned to ON.  Defective warning lamp circuit
If the engine warning lamp does not illuminate immediately after the ignition switch  Malfunction of the engine-ECU
is turned to ON, one of the malfunctions listed at right has probably occurred.

NG
MUT-II Data list Check the engine-ECU power supply and earth circuit.
16 Engine ECU power supply voltage (Refer to P.13B-65.) (Refer to P.13B-59, INSPECTION PROCEDURE 24.)
OK
OK NG
Measure at the engine-ECU connector B-29. Check the following Repair
 Disconnect the connector, and measure at the harness side. connector: B-29.
 Earth the terminal No. 36.
OK
OK: The engine warning lamp illuminates.
NG Check trouble symptom.
NG
NG
Check a burnt-out bulb. Replace Replace the engine-ECU.
OK
NG
Measure at the combination meter connector B-01. Check the engine warning lamp power supply circuit, and repair
 Disconnect the connector, and measure at the harness side. if necessary.
 Voltage between 49 and earth (Ignition switch: ON)
OK: System voltage
OK
NG
Check the following connectors: Repair
B-01, B-02, B-19, B-29
OK
NG
Check trouble symptom. Check the harness wire between combination meter and engine-
ECU, and repair if necessary.

INSPECTION PROCEDURE 4
The engine warning lamp remains illuminating and never Probable cause
goes out.
In cases such as the above, the cause is probably that the engine-ECU is detecting  Short-circuit between the engine warning lamp and
a problem in a sensor or actuator, or that one of the malfunctions listed at right engine-ECU
has occurred.  Malfunction of the engine-ECU

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Measure at the combination meter connector B-02. Check the harness wire between combination meter and engine-
 Disconnect the connector, and measure at the harness side. ECU connector, and repair if necessary.
 Disconnect the engine-ECU connector
 Continuity between 4 and earth
OK: No continuity
OK

Replace the engine-ECU.

13B-42 MPI – Troubleshooting

INSPECTION PROCEDURE 5
No initial combustion (starting impossible) Probable cause
In cases such as the above, the cause is probably that a spark plug is defective,  Malfunction of the ignition system
or that the supply of fuel to the combustion chamber is defective.  Malfunction of the fuel pump system
In addition, foreign materials (water, kerosene, etc.) may be mixed with the fuel.  Malfunction of the injectors
 Malfunction of the engine-ECU
 Malfunction of the immobilizer system
 Foreign materials in fuel

NG
Check battery voltage when cranking. Check the battery. (Refer to GROUP 54 – Battery.)
OK: 8 V or higher
OK
Yes
Is an immobilizer-ECU diagnosis code displayed? Check the immobilizer.
(Refer to GROUP 54 – Ignition Key and Immobilizer.)
No
NG
MUT-II Data list Check the power supply and ignition switch-IG system.
16 Voltage of engine-ECU power source (Refer to P.13B-65.) (Refer to P.13B-59, INSPECTION PROCEDURE 25.)
OK
No
Does the camshaft rotate at the engine cranking? (When oil filler Check timing belt for breakage.
cap is removed.)
Yes
Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
No
MUT-II Data list Check the crank angle sensor system. (Refer to P.13B-25, IN-
22 Crank angle sensor SPECTION PROCEDURE FOR DIAGNOSIS CODE P0335.)
OK: Cranking speed is displayed.
OK
NG
MUT-II Actuator test Check the fuel pump system. (Refer to P.13B-60, INSPECTION
07 Fuel pump (Refer to P.13B-70.) PROCEDURE 26.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system. (Refer to
21 Engine coolant temperature sensor (Refer to P.13B-65.) P.13B-13, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
P0115.)
OK
NG
Can any sound be heard from the injectors when cranking? Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203,
OK P0204.)
NG
Does the engine tachometer display the cranking speed? Check the ignition circuit system.
 Set the tachometer of primary voltage detection type. (Refer to P.13B-63, INSPECTION PROCEDURE 31.)
OK
NG
Check the ignition timing when cranking. Check that the distributor is installed properly.
OK: Approx. 5 BTDC
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle service.)
 Check if the injectors are clogged.
 Check if foreign materials (water, alcohol, etc.) got into fuel.
 Check the compression pressure.
 Check the immobilizer system. (Refer to GROUP 54 – Ignition Key and Immobilizer.)
 MPI – Troubleshooting 13B-43
INSPECTION PROCEDURE 6
Initial combustion but no complete combustion Probable cause
(starting impossible)
In such cases as the above, the cause is probably that the spark plugs are generating  Malfunction of the ignition system
sparks but the sparks are weak, or the initial mixture for starting is not appropriate.  Malfunction of the injector system
 Foreign materials in fuel
 Poor compression
 Malfunction of the engine-ECU

NG
Check battery voltage when cranking. Check the battery. (Refer to GROUP 54 – Battery.)
OK: 8 V or higher
OK
Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
MUT-II Actuator test Check the fuel pump system.
07 Fuel pump (Refer to P.13B-70.) (Refer to P.13B-60, INSPECTION PROCEDURE 26.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
OK SIS CODE P0115.)
NG
MUT-II Data list Check the ignition switch-ST system.
18 Ignition switch-ST (Refer to P.13B-65.) (Refer to P.13B-61, INSPECTION PROCEDURE 27.)
OK
NG Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
Can any sound be heard from the injectors when cranking? CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203,
OK P0204.)
Yes NG
Is starting good if the engine is cranked with the accelerator pedal Check ISC servo for op- Check the ISC servo system.
slightly depressed? eration sound. (Refer to P.13B-36, INSPEC-
(Refer to P.13B-75*.) TION PROCEDURE FOR
No
DIAGNOSIS CODE P0505.)
OK

 Clean the throttle valve area. (Refer to P.13B-65*.)

NG
Check the ignition timing when cranking. Check that the distributor is installed properly.
OK: Approx. 5BTDC
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check if the injectors are clogged.
 Check the compression pressure. (Refer to GROUP 11B – On-vehicle Service.)
 Check fuel lines for clogging.
 Check if foreign materials (water, alcohol, etc.) got into fuel.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-44 MPI – Troubleshooting

INSPECTION PROCEDURE 7
In takes too long time to start. (Incorrect starting) Probable cause
In cases such as the above, the cause is probably that the spark is weak and  Malfunction of the ignition system
ignition is difficult, the initial mixture for starting is not appropriate, or sufficient  Malfunction of the injector system
compression pressure is not being obtained.  Inappropriate gasoline use
 Poor compression

NG
Check battery voltage when cranking Check the battery. (Refer to GROUP 54 – Battery.)
OK: 8 V or higher
OK
Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
MUT-II Actuator test Check the fuel pump system.
07 Fuel pump (Refer to P.13B-70.) (Refer to P.13B-60, INSPECTION PROCEDURE 26.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK
NG
MUT-II Data list Check the ignition switch-ST system.
18 Ignition switch-ST (Refer to P.13B-65.) (Refer to P.13B-61, INSPECTION PROCEDURE 27.)
OK
NG Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
Can any sound be heard from the injectors when cranking? CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203,
OK P0204.)
NG
Check the ignition timing when cranking. Check that the distributor is installed properly.
OK: Approx. 5BTDC
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check if the injectors are clogged.
 Check the compression pressure. (Refer to GROUP 11B – On-vehicle Service.)
 Check if foreign materials (water, alcohol, etc.) got into fuel.
 MPI – Troubleshooting 13B-45
INSPECTION PROCEDURE 8
Unstable idling (Rough idling, hunting) Probable cause
In cases as the above, the cause is probably that the ignition system, air/fuel mixture,  Malfunction of the ignition system
idle speed control (ISC) or compression pressure is defective.  Malfunction of air-fuel ratio control system
Because the range of possible causes is broad, inspection is narrowed down to  Malfunction of the ISC system
simple items.  Malfunction of the purge control solenoid valve system
 Malfunction of the EGR solenoid valve system
 Poor compression
 Drawing air into exhaust system
Yes
Were the battery terminals disconnected? After warming-up, let the engine run at idling for 10 minutes.
No
Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
Yes
Does idling speed fluctuate excessively? Check the throttle body. (Refer to P.13B-65*.)
No
Check trouble symptom.
NG

Inspect the intake of air into the air intake system.

 Broken intake manifold gasket
 Broken air intake hose
 Broken vacuum hose
 Positive crankcase ventilation valve does not operate.

NG
Check the ISC servo for operation sound. (Refer to P.13B-75*.) Check the ISC system. (Refer to P.13B-36, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
OK
NG
Check the injector for operation sound. Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
OK CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203,
P0204.)
NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
NG
MUT-II Data list Check the intake air temperature sensor system.
13 Intake air temperature sensor (Refer to P.13B-65.) (Refer to P.13B-12, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0110.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK
NG
MUT-II Actuator test Check the purge control solenoid valve system. (Refer to P.13B-34,
08 Purge control solenoid valve (Refer to P.13B-70.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.)
OK
NG
MUT-II Actuator test Check the EGR control solenoid valve system. (Refer to P.13B-32,
10 EGR control solenoid valve (Refer to P.13B-70.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13B-22, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG Check the oxygen sensor (front) system. (Refer to P.13B-19, IN-
MUT-II Data list SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
11 Oxygen sensor (front) OK
OK: 600 – 1,000 mV during sudden racing To next page

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-46 MPI – Troubleshooting

From previous page

OK
NG OK
MUT-II Data list Check the fuel pressure. 1. Inspect the intake of
11 Oxygen sensor (front) (Refer to P.13B-67*.) air into the air intake
OK: Changes between 0 – 400 mV and 600 – 1,000 mV system.
during idling  Broken intake man-
OK ifold gasket
NG  Broken vacuum hose
MUT-II Data list Check the power steering  PCV valve does not
27 Power steering fluid pressure switch (Refer to P.13B-65.) fluid pressure switch sys- operate.
tem. (Refer to P.13B-61,  Broken air intake
OK
INSPECTION PROCE- hose
DURE 28.) 2. Check the injector for
clog.
NG
MUT-II Data list Check the A/C switch and A/C relay system.
28 A/C switch (Refer to P.13B-65.) (Refer to P.13B-62, INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the electrical load switch system.
33 Electrical load switch (Refer to P.13B-65.) (Refer to P.13B-62, INSPECTION PROCEDURE 30.)
OK
NG
MUT-II Data list Adjust the basic idle speed. (Refer to P.13B-66*.)
45 ISC servo position (Refer to P.13B-65.)
OK
NG
Check the ignition timing. Check that the distributor is installed properly.
(Refer to GROUP 11B – On-vehicle Service.)
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check the purge control system. (Refer to GROUP 17 – Emission Control System.)
 Check the EGR control system. (Refer to GROUP 17 – Emission Control System.)
 Check the compression pressure. (Refer to GROUP 11A – On-vehicle Service.)
 Check if foreign materials (water, alcohol, etc.) got into fuel.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 MPI – Troubleshooting 13B-47
INSPECTION PROCEDURE 9
Idling speed is high. (Improper idling speed) Probable cause
In such cases as the above, the cause is probably that the intake air volume during  Malfunction of the ISC system
idling is too great.  Malfunction of the throttle body

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Check the ISC servo for operation sound. (Refer to P.13B-75*.) Check the ISC system. (Refer to P.13B-36, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
OK
NG
MUT-II Data list Check the throttle position sensor system.
14 Throttle position sensor (Refer to P.13B-65.) (Refer to P.13B-16, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0120.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK

NG
MUT-II Data list Check the A/C switch and A/C relay system.
28 A/C switch (Refer to P.13B-65.) (Refer to P.13B-62, INSPECTION PROCEDURE 29.)
OK

Basic idle adjustment (Refer to P.13B-66*.)

NG
Check trouble symptom. Clean the throttle valve area. (Refer to P.13B-65*.)

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

INSPECTION PROCEDURE 10
Idling speed is low. (Improper idling speed) Probable cause
In cases such as the above, the cause is probably that the intake air volume during  Malfunction of the ISC system
idling is too small.  Malfunction of the throttle body

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Check the ISC servo for operation sound. (Refer to P.13B-75*.) Check the ISC system. (Refer to P.13B-36, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
OK
NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK

Basic idle adjustment (Refer to P.13B-66*.)

NG
Check trouble symptom. Clean the throttle valve area. (Refer to P.13B-65*.)

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-48 MPI – Troubleshooting

INSPECTION PROCEDURE 11
When the engine is cold, it stalls at idling. (Die out) Probable cause
In such cases as the above, the cause is probably that the air/fuel mixture is  Malfunction of the ISC system
inappropriate when the engine is cold, or that the intake air volume is insufficient.  Malfunction of the throttle body
 Malfunction of the injector system
 Malfunction of the ignition system

Yes
Were the battery terminals disconnected? After warming-up, let the engine run at idling for 10 minutes.
No
Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
Yes
Does the engine stall right after the accelerator pedal is released? Clean the throttle valve area. (Refer to P.13B-65*.)
No
No
Is engine-idling stable after the warming-up? Check if the unstable idling (Rough idling, hunting).
(Refer to P.13B-45, INSPECTION PROCEDURE 8.)
Yes

NG
Check the ISC servo for operation sound. (Refer to P.13B-75*.) Check the ISC system. (Refer to P.13B-36, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
OK

NG
Check the injector for operation sound. Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203,
OK P0204.)
NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK
NG
MUT-II Actuator test Check the EGR control solenoid valve system. (Refer to P.13B-32,
10 EGR control solenoid valve (Refer to P.13B-70.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK

Check the fuel pressure. (Refer to P.13B-67*.)

OK
NG
Check the ignition timing. Check that the distributor is installed properly.
(Refer to GROUP 11B – On-vehicle Service.)
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check the compression pressure. (Refer to GROUP 11B – On-vehicle Service.)
 Check the engine oil viscosity.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 MPI – Troubleshooting 13B-49
INSPECTION PROCEDURE 12
When the engine is hot, it stalls at idling. (Die out) Probable cause
In such cases as the above, the cause is probably that ignition system, air/fuel  Malfunction of the ignition system
mixture, idle speed control (ISC) or compression pressure is defective.  Malfunction of air-fuel ratio control system
In addition, if the engine suddenly stalls, the cause may also be a defective connector  Malfunction of the ISC system
contact.  Drawing air into intake system
 Improper connector contact

Yes
Were the battery terminals disconnected? After warming-up, let the engine run at idling for 10 minutes.
No
Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Check the ISC servo for operation sound. (Refer to P.13B-75*.) Check the ISC system. (Refer to P.13B-36, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
OK

NG
Check the injector for operation sound. Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203,
OK P0204.)
Yes
Does the engine stall right after the accelerator pedal is released? Clean the throttle valve area. (Refer to P.13B-65*.)
No
No
Does the engine stall easily again? While carrying out an intermittent malfunction simulation test (Refer
to GROUP 00 – Points to Note for Intermittent Malfunctions.),
Yes check for sudden changes in the signals shown below.
 Crank angle sensor signal  Primary and secondary
 Injector drive signal ignition signal
 Fuel pump drive signal
 Engine ECU power supply
voltage

NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
NG
MUT-II Data list Check the intake air temperature sensor system.
13 Intake air temperature sensor (Refer to P.13B-65.) (Refer to P.13B-12, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0110.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK
NG
MUT-II Actuator test Check the EGR control solenoid valve system. (Refer to P.13B-32,
10 EGR control solenoid valve (Refer to P.13B-70.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13B-22, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system. (Refer to P.13B-19, IN-
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV during sudden racing
OK

To next page
13B-50 MPI – Troubleshooting

From previous page

OK
NG OK
MUT-II Data list Check the fuel pressure. 1. Inspect the intake of
11 Oxygen sensor (front) (Refer to P.13B-67*.) air into the air intake
OK: Changes between 0 – 400 mV and 600 – 1,000 mV system.
during idling  Broken intake man-
OK ifold gasket
NG  Broken vacuum hose
MUT-II Data list Check the power steering  PCV valve does not
27 Power steering fluid pressure switch (Refer to P.13B-65.) fluid pressure switch sys- operate.
tem. (Refer to P.13B-61,  Broken air intake
OK
INSPECTION PROCE- hose
DURE 28.) 2. Check the injector for
clog.
NG
MUT-II Data list Check the A/C switch and A/C relay system.
28 A/C switch (Refer to P.13B-65.) (Refer to P.13B-62, INSPECTION PROCEDURE 29.)
OK
NG
MUT-II Data list Check the electrical load switch system.
33 Electrical load switch (Refer to P.13B-65.) (Refer to P.13B-62, INSPECTION PROCEDURE 30.)
OK
NG
MUT-II Data list Adjust the basic idle speed. (Refer to P.13B-66*.)
45 ISC servo position (Refer to P.13B-65.)
OK
NG
Check the ignition timing. Check that the distributor is installed properly.
(Refer to GROUP 11B – On-vehicle Service.)
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check if the injectors are clogged.
 Check the compression pressure. (Refer to GROUP 11B – On-vehicle Service.)
 Check if foreign materials (water, alcohol, etc.) got into fuel.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 MPI – Troubleshooting 13B-51
INSPECTION PROCEDURE 13
The engine stalls when starting the car. (Pass out) Probable cause
In cases such as the above, the cause is probably misfiring due to a weak spark,  Drawing air into intake system
or an inappropriate air/fuel mixture when the accelerator pedal is depressed.  Malfunction of the ignition system

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
MUT-II Actuator test Check the EGR control solenoid valve system. (Refer to P.13B-32,
10 EGR control solenoid valve (Refer to P.13B-70.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check if air was drawn into the intake system.
Broken intake manifold gasket
Broken or disconnected vacuum hose
Improper operation of the PCV valve
Broken air intake hose

INSPECTION PROCEDURE 14
The engine stalls when decelerating. Probable cause
In cases such as the above, the cause is probably that the intake air volume is  Malfunction of the ISC system
insufficient due to a defective idle speed control (ISC) servo system.

Yes
Were the battery terminals disconnected? After warming-up, let the engine run at idling for 10 minutes.
No
Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK

Yes
MUT-II Data list Check the vehicle speed sensor system. (Refer to P.13B-35, IN-
45 ISC servo position SPECTION PROCEDURE FOR DIAGNOSIS CODE P0500.)
 Is the idle speed control (ISC) servo position drops to 0–2
steps when decelerating (engine r/min less than 1,000)?
No
NG
MUT-II Actuator test Check the EGR control solenoid valve system.
10 EGR control solenoid valve (Refer to P.13B-70.) (Refer to P.13B-32, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0403.)
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Clean the throttle valve area.
13B-52 MPI – Troubleshooting

INSPECTION PROCEDURE 15
Hesitation, sag or stumble Probable cause
In cases such as the above, the cause is probably that ignition system, air/fuel  Malfunction of the ignition system
mixture or compression pressure is defective.  Malfunction of air-fuel ratio control system
 Malfunction of the fuel supply system
 Malfunction of the EGR control solenoid valve system
 Poor compression

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Check the injectors for operation sound. Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203,
OK P0204.)
NG
Check the ignition timing. Check that the distributor is installed properly.
(Refer to GROUP 11B – On-vehicle Service.)
OK
NG
MUT-II Data list Check the intake air temperature sensor system. (Refer to
13 Intake air temperature sensor (Refer to P.13B-65.) P.13B-12, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
P0110.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK
NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
NG
MUT-II Actuator test Check the EGR control solenoid valve system. (Refer to P.13B-32,
10 EGR control solenoid valve (Refer to P.13B-70.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13B-22, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system. (Refer to P.13B-19, IN-
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV during sudden racing
OK
NG OK
MUT-II Data list Check the fuel pressure. 1. Inspect the intake of
11 Oxygen sensor (front) (Refer to P.13B-67*.) air into the air intake
OK: Changes between 0 – 400 mV and 600 – 1,000 mV system.
during idling  Broken intake man-
ifold gasket
OK
 Broken vacuum hose
 PCV valve does not
operate.
 Broken air intake
hose
Check the fuel pressure. (Refer to P.13B-67*.) 2. Check the injector for
clog.
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check the EGR control system. (Refer to GROUP 17 – Emission Control System.)
 Check the compression pressure. (Refer to GROUP 11B – On-vehicle Service.)
 Check the fuel filter or fuel line for clogging.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 MPI – Troubleshooting 13B-53
INSPECTION PROCEDURE 16
The feeling of impact or vibration when accelerating Probable cause
In cases such as the above, the cause is probably that there is an ignition leak  Malfunction of the ignition system
accompanying the increase in the spark plug demand voltage during acceleration.

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check for occurrence of ignition leak.

INSPECTION PROCEDURE 17
The feeling of impact or vibration when decelerating. Probable cause
Malfunction of the ISC system is suspected.  Malfunction of the ISC system

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Check the ISC servo for operation sound. (Refer to P.13B-75*.) Check the ISC system. (Refer to P.13B-36, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
OK
NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK

Clean the throttle valve area. (Refer to P.13B-65*.)

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-54 MPI – Troubleshooting

INSPECTION PROCEDURE 18
Poor acceleration Probable cause
Defective ignition system, abnormal air-fuel ratio, poor compression pressure, etc.  Malfunction of the ignition system
are suspected.  Malfunction of air-fuel ratio control system
 Malfunction of the fuel supply system
 Poor compression pressure
 Clogged exhaust system

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Check the injectors for operation sound. Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203,
OK P0204.)
NG
Check the ignition timing. Check that the distributor is installed properly.
(Refer to GROUP 11B – On-vehicle Service.)
OK
NG
MUT-II Data list Check the intake air temperature sensor system.
13 Intake air temperature sensor (Refer to P.13B-65.) (Refer to P.13B-12, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0110.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK
NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
NG
MUT-II Actuator test Check the EGR control solenoid valve system. (Refer to P.13B-32,
10 EGR control solenoid valve (Refer to P.13B-70.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13B-22, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system. (Refer to P.13B-19, IN-
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV during sudden racing
OK
NG OK
MUT-II Data list Check the fuel pressure. 1. Inspect the intake of
11 Oxygen sensor (front) (Refer to P.13B-67*.) air into the air intake
OK: Changes between 0 – 400 mV and 600 – 1,000 mV system.
during idling  Broken intake man-
ifold gasket
OK  Broken vacuum hose
 PCV valve does not
operate.
 Broken air intake
hose
Check the fuel pressure. (Refer to P.13B-67*.) 2. Check the injector for
clog.
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check the compression pressure. (Refer to GROUP 11B – On-vehicle Service.)
 Check the fuel filter or fuel line for clogging.
 Broken air intake hose
 Clogged air cleaner

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 MPI – Troubleshooting 13B-55
INSPECTION PROCEDURE 19
Surge Probable cause
Defective ignition system, abnormal air-fuel ratio, etc. are suspected.  Malfunction of the ignition system
 Malfunction of air-fuel ratio control system
 Malfunction of the EGR control solenoid valve system

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Check the injectors for operation sound. Check the injector system. (Refer to P.13B-26, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P020, P0202, P0203, P0204.)
OK

NG
Check the ignition timing. Check that the distributor is installed properly.
(Refer to GROUP 11B – On-vehicle Service.)
OK
NG
MUT-II Data list Check the intake air temperature sensor system.
13 Intake air temperature sensor (Refer to P.13B-65.) (Refer to P.13B-12, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0110.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK
NG
MUT-II Data list Check the throttle position sensor system. (Refer to P.13B-16,
14 Throttle position sensor (Refer to P.13B-65.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
NG
MUT-II Actuator test Check the EGR control solenoid valve system. (Refer to P.13B-32,
10 EGR control solenoid valve (Refer to P.13B-70.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13B-22, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK
NG
MUT-II Data list Check the oxygen sensor (front) system. (Refer to P.13B-19, IN-
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV during sudden racing
OK
NG OK
MUT-II Data list Check the fuel pressure. 1. Inspect the intake of
11 Oxygen sensor (front) (Refer to P.13B-67*.) air into the air intake
OK: Changes between 0 – 400 mV and 600 – 1,000 mV system.
during idling  Broken intake man-
ifold gasket
OK  Broken vacuum hose
 PCV valve does not
operate.
 Broken air intake
hose
Check the fuel pressure. (Refer to P.13B-67*.) 2. Check the injector for
clog.
OK

Check the following items.

 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check the EGR control system. (Refer to GROUP 17 – Emission Control System.)

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-56 MPI – Troubleshooting

INSPECTION PROCEDURE 20
Knocking Probable cause
In cases as the above, the cause is probably that the detonation control is defective  Defective detonation sensor
or the heat value of the spark plug is inappropriate.  Inappropriate heat value of the spark plug

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
No
Does knocking occur when driving with the detonation sensor Check the detonation sensor system. (Refer to P.13B-29, INSPEC-
connector disconnected? At this time, use the MUT-II to check TION PROCEDURE FOR DIAGNOSIS CODE P0325.)
if the timing is retarded compared to when the detonation sensor
connector is disconnected.
Yes

Check the following items.

 Spark plugs
 Check if foreign materials (water, alcohol, etc.) got into fuel.

INSPECTION PROCEDURE 21
Dieseling Probable cause
Fuel leakage from injectors is suspected.  Fuel leakage from injectors

Check the injectors for fuel leakage.

 MPI – Troubleshooting 13B-57
INSPECTION PROCEDURE 22
Too high CO and HC concentration when idling Probable cause
Abnormal air-fuel ratio is suspected.  Malfunction of the air-fuel ratio control system
 Deteriorated catalyst

Yes
MUT-II Self-Diag code Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis codes displayed? CODES.
No
NG
Check the ignition timing. Check that the distributor is installed properly.
(Refer to GROUP 11B – On-vehicle Service.)
OK
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor. (Refer to P.13B-65.) (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK

NG
MUT-II Data list Check the intake air temperature sensor system.
13 Intake air temperature sensor (Refer to P.13B-65.) (Refer to P.13B-12, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0110.)
OK

NG
MUT-II Data list Check the oxygen sensor (rear) system. (Refer to P.13B-22, IN-
59 Oxygen sensor (rear) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
 Transmission: 2nd gear
 Driving with throttle widely open
OK: 600 – 1,000 mV
OK

NG
MUT-II Data list Check the oxygen sensor (front) system. (Refer to P.13B-19, IN-
11 Oxygen sensor (front) SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK: 600 – 1,000 mV when racing suddenly
OK
OK
MUT-II Data list Replace the oxygen sensor.
11 Oxygen sensor (front)
OK: Repeat 0 – 400 mV and 600 – 1,000 mV alternately
when idling. Check trouble symptom.
NG NG
Check the fuel pressure. (Refer to P.13B-67*.)
OK

Check the following items.

 Check the injectors for operation sound.
 Check the injectors for fuel leakage.
 Check the ignition coil, spark plugs, spark plug cables. (Refer to GROUP 16 – On-vehicle Service.)
 Check the compression pressure. (Refer to GROUP 11B – On-vehicle Service.)
 Check the positive crankcase ventilation system. (Refer to GROUP 17 – Emission Control System.)
 Check the purge control system. (Refer to GROUP 17 – Emission Control System.)
 Check the EGR control system. (Refer to GROUP 17 – Emission Control System.)

Check the trouble symptom.

NG

Replace the catalytic converter.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-58 MPI – Troubleshooting

INSPECTION PROCEDURE 23
Fans (radiator fan, A/C condenser fan) are inoperative. Probable cause
The fan motor relay is controlled by the power transistor inside the engine-ECU  Malfunction of the fan motor relay
turning ON and OFF.  Malfunction of the fan motor
 Malfunction of the thermostat
 Improper connector contact, open circuit or
short-circuited harness wire
 Malfunction of the engine-ECU

NG
Measure at the engine-ECU connector B-28.  Check the radiator fan circuit. (Refer to ELECTRICAL WIRING.)
 Disconnect the connector, and measure at the harness side.  Check the A/C condenser fan circuit.
 Check the condition of the fans (radiator fan and A/C condenser (Refer to ELECTRICAL WIRING.)
fan). (Ignition switch: ON)
OK: Fans are stopped
 Voltage between 20 and earth, 21 and earth
(Ignition switch: ON)
OK: System voltage
 Connect a jumper wire between 20 and earth
(Ignition switch: ON)
OK: Radiator fan and condenser fan run at high speed.
 Connect a jumper wire between 21 and earth
(Ignition switch: ON)
OK: Radiator fan and condenser fan run at low speed.
OK
NG
Check the following connector: B-28 Repair
OK

Check the trouble symptoms.

NG
NG
MUT-II Data list Check the engine coolant temperature sensor system.
21 Engine coolant temperature sensor (Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
OK: After the engine has warmed up, the engine coolant tempera- SIS CODE P0115.)
ture durning idling is identical to the MUT-II reading.
OK
NG
Check the thermostat. Replace
OK

Replace the engine-ECU.

 MPI – Troubleshooting 13B-59
INSPECTION PROCEDURE 24
Check the engine-ECU power supply and earth circuit.

(1) NG NG
Measure the engine-ECU connectors, B-28, B-29, B-31. Check the following Repair
 Disconnect the connector and measure at the harness side connectors: B-18, B-58
(1) Voltage between 82 and earth (Ignition switch: ON) OK
OK: System voltage (2, 3) NG
(2) Voltage between 38 and earth Check trouble symptom.
OK: System voltage
(3) Voltage between 12, 25 and earth (Ignition switch: ON) OK
(4) NG NG
OK: System voltage (when the terminal 38 is earthed)
(4) Continuity between 13, 26 and earth Check the harness wire Repair
OK: Continuity between engine-ECU
(5) NG and ignition switch con-
(5) Voltage between 80 and earth
OK: System voltage nector.
OK
OK
Check the ignition switch.
(Refer to GROUP 54 – Ignition Switch and Immobilizer System.)
NG
Check the following Repair
connectors: NG
B-28, B-29, B-31 Check the following Repair
OK connector: B-26
OK
Check trouble symptom.
NG Check trouble symptoms.
NG
Replace the engine-ECU.
Check the harness wire between engine-ECU and control relay
connector, and repair if necessary.

NG
Check the following connectors: Repair Check the harness wire between engine-ECU and earth, and
B-18, B-45 repair if necessary.
OK

Check trouble symptom.

NG

Check the harness wire between engine-ECU and battery, and

repair if necessary.

INSPECTION PROCEDURE 25
Power supply system and ignition switch-IG system Probable cause
When an ignition switch ON signal is input to the engine-ECU, the engine-ECU  Malfunction of the ignition switch
turns the control relay ON. This causes battery voltage to be supplied to the  Malfunction of the control relay
engine-ECU, injectors and air flow sensor.  Improper connector contact, open circuit or
short-circuited harness wire
 Disconnected engine-ECU earth wire
 Malfunction of the engine-ECU

NG
Check the control relay. (Refer to P.13B-71*.) Replace
OK
NG NG
Measure at the control relay connector B-26. Check the following Repair
 Disconnect the connector, and measure at the harness side. connector: A-23
 Voltage between 3, 4 and earth
OK
OK: System voltage
OK Check trouble symptom.
NG
Check the engine-ECU power supply and earth circuit.
(Refer to P.13B-59, INSPECTION PROCEDURE 24.) Check the harness wire between battery and control relay connec-
tor, and repair if necessary.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
13B-60 MPI – Troubleshooting

INSPECTION PROCEDURE 26
Fuel pump system Probable cause
The engine-ECU turns the fuel pump relay ON when the engine is cranking or running,  Malfunction of the fuel pump relay
and this supplies power to drive the fuel pump.  Malfunction of the fuel pump
 Improper connector contact, open circuit or
short-circuited harness wire
 Malfunction of the engine-ECU

NG NG
Check the fuel pump operation. Measure at the fuel pump connector Check the following connectors:
(Refer to P.13B-69*.) D-13. D-13, D-15
OK  Disconnect the connector, and OK NG
measure at the harness side.
 Continuity between 4 and earth Repair
OK: Continuity
OK Check trouble symptom.
NG
Check the following connectors: NG Repair
B-18, B-27, D-13, D-15
OK
Check the harness wire between the
NG fuel pump and earth, and repair if nec-
Check the fuel pump relay. Replace
(Refer to P.13B-71*.) essary.
OK Check trouble symptom.
NG
NG
Check the harness wire between the Repair
fuel pump relay and fuel pump connec-
tor.
OK

Replace the fuel pump.

NG NG
Measure at the fuel pump relay connec- Measure at the fuel pump relay connec- Check the following connectors:
tor B-27. tor B-27. B-18, B-58
 Connect the connector.  Disconnect the connector, and NG
OK
 Voltage between 1 and earth measure at the harness side.
 MUT-II Actuator test: Fuel pump  Voltage between 4 and earth Repair
drive (Ignition switch: ON)
OK: System voltage OK: System voltage Check trouble symptom.
OK NG
OK
NG Check the harness wire between the
Check the harness wire between fuel Measure at the engine-ECU connector
fuel pump relay and ignition switch con-
pump relay connector and fuel pump, B-28.
nector.
and repair if necessary.  Disconnect the connector, and
measure at the harness side. OK NG
 Voltage between 22 and earth
(Ignition switch: ON) Repair
OK: System voltage
OK Check the ignition switch.
(Refer to GROUP 54 – Ignition Switch
and Immobilizer System.)

Check the following connector: B-27

OK NG
NG
Check the following connector: B-28 Repair Repair
OK
Check trouble symptom.
Check trouble symptom.
NG
NG
Check the harness wire between the
Replace the engine-ECU. engine-ECU and the fuel pump relay,
and repair if necessary.

NOTE:
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
 MPI – Troubleshooting 13B-61
INSPECTION PROCEDURE 27
Ignition switch-ST system Probable cause
The ignition switch-ST inputs a HIGH signal to the engine-ECU while the engine  Malfunction of ignition switch
is cranking.  Improper connector contact, open circuit or
The engine-ECU controls fuel injection, etc. during starting based on this input. short-circuited harness wire
 Malfunction of the engine-ECU

NG NG
Measure at the engine-ECU connector B-31. Check the following con- Repair
 Disconnect the connector, and measure at the harness side. nectors: A-74, B-18, B-58
 Voltage between 71 and earth (Ignition switch: START) OK
OK: 8V or more
OK Check trouble symptom.
NG NG
Check the following Repair NG
connector: B-31 Check harness wire be- Repair
OK tween the engine-ECU and
ignition switch connector.
Check trouble symptom.
NG OK

Replace the engine-ECU. Check the ignition switch.

(Refer to GROUP 54 – Ignition Switch and Immobilizer system.)

INSPECTION PROCEDURE 28
Power steering fluid pressure switch system Probable cause
The presence or absence of power steering load is input to the engine-ECU.  Malfunction of power steering fluid pressure switch
The engine-ECU controls the idle speed control (ISC) servo based on this input.  Improper connector contact, open circuit or
short-circuited harness wire
 Malfunction of the engine-ECU

NG
Check the power steering fluid pressure switch. Replace
(Refer to GROUP 37A – On-vehicle Service.)
OK
NG NG
Measure at the power steering fluid pressure switch connector Check the following Repair
A-38. connectors: A-23, B-29
 Disconnect the connector, and measure at the harness side.
OK
 Voltage between 1 and earth (Ignition switch: ON)
OK: System voltage Check trouble symptom.
OK NG
NG NG
Check the following Repair Check harness wire be- Repair
connector: A-38 tween engine-ECU and
OK power steering fluid pres-
sure switch connector.
Check trouble symptom. OK
NG
Replace the engine-ECU.
Replace the engine-ECU.
13B-62 MPI – Troubleshooting

INSPECTION PROCEDURE 29
A/C switch and A/C relay system Probable cause
When an A/C ON signal is input to the engine-ECU, the engine-ECU carries out  Malfunction of A/C control system
control of the idle speed control (ISC) servo, and also operates the A/C compressor  Malfunction of A/C switch
magnetic clutch.  Improper connector contact, open circuit or
short-circuited harness wire
 Malfunction of the engine-ECU

NG
Check the A/C compressor relay. Replace
(Refer to GROUP 55 – On-vehicle Service.)
OK
NG
Measure at the engine-ECU connectors B-28, B-29. Check the A/C system. (Refer to GROUP 55 – On-vehicle Service.)
 Disconnect the connectors, and measure at the harness side.
 Voltage between 8 and earth, and 45 and earth
(Ignition switch: ON, A/C switch: ON)
OK: System voltage OK NG
 Short circuit between 8 and earth Check the following Replace
(Ignition switch: ON, A/C switch: ON) connectors: B-28, B-29
OK: A/C compressor clutch turns on. OK

Check trouble symptom.

NG

Replace the engine-ECU.

INSPECTION PROCEDURE 30
Electrical load switch Probable cause
During idling, the ON/OFF condition of switches is equipment which have a large  Improper connector contact, open circuit or
electrical load is input to the engine-ECU. short-circuited harness wire in the headlamp relay
The engine-ECU controls the idle speed control servo on this input. circuit
 Improper connector contact, open circuit or
short-circuited harness wire in the defogger relay
circuit.
 Malfunction of the engine-ECU

NG
Measure at the engine-ECU connector B-29. Check the headlamp relay circuit.
 Disconnect the connectors, and measure at the harness side. (Refer to ELECTRICAL WIRING.)
 Voltage between 41 and earth Check the defogger relay circuit.
(Lighting switch: ON) (Refer to ELECTRICAL WIRING.)
OK: System voltage
OK
NG
Check the following connector: B-29 Repair
OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

 MPI – Troubleshooting 13B-63
INSPECTION PROCEDURE 31
Ignition circuit system Probable cause
The engine-ECU interrupts the ignition coil primary current by turning the power  Malfunction of ignition coil
transistor inside the engine-ECU ON and OFF.  Malfunction of ignition failure sensor
 Improper connector contact, open circuit or
short-circuited harness wire
 Malfunction of the engine-ECU

NG
Check the ignition coil. Replace
(Refer to GROUP 16 – Ignition System.)
OK
NG
Check the ignition failure sensor. Replace
(Refer to GROUP 16 – Ignition System.)
OK
NG NG
Measure at the ignition failure sensor connector A-96. Check the following Repair
 Disconnect the connector and measure at the harness side. connector: B-18, B-58
Voltage between 4 and ground (Ignition switch: ON)
OK
OK: System voltage
OK Check trouble symptom.
NG
NG
Check the harness wire Repair
between the ignition
failure sensor and ignition
switch connector.
OK

Check the ignition switch. (Refer to GROUP 54 – Ignition Switch.)

(1) NG NG
Measure at the ignition coil connectors Check the following connector: Repair
A-89, A-91. A-96
 Disconnect the connector, and
measure at the harness side. OK
(1) Voltage between 1 and earth NG
Check trouble symptom. Check the harness wire between the
(Ignition switch: ON)
ignition coil and ignition failure sensor
OK: Battery positive voltage
connector, and repair if necessary.
(2) Voltage between 3 and earth
(Engine: Cranking) (2) NG NG
OK: 0.5 – 4.0 V Check the following connector: Repair
(3) Continuity between 2 and earth B-28
(3) NG
OK: Continuity OK
OK

Check the following connector:

A-89, A-91
OK NG
Repair
Check trouble symptom.
Check trouble symptom. NG
NG
NG Check the harness wire between the Repair
engine-ECU and ignition coil connector.
To the next page
OK

Replace the engine-ECU.

Check the harness wire between the

ignition coil connector and ground, and
repair if necessary.
13B-64 MPI – Troubleshooting

From the previous page

OK

Measure at the ignition failure sensor connector A-96. 1. NG Check the following NG
Repair
 Disconnect the connector and measure at the harness side. connector: B-30
1. Voltage between 2 and earth (Ignition switch: ON)
OK
OK: 4 V or more
2. Continuity between 1 and earth Check trouble symptom.
OK: Continuity
NG

There is an open or short-circuit the ignition signal output harness

of the ignition failure sensor, so check and repair the harness.

2. NG
Check the harness wire between the ignition failure sensor and
OK earth, and repair if necessary.

NG NG
Measure at the engine-ECU connector B-30. Check the following Repair
 Measure with the connector connected. connector: A-96
 Voltage between 58 and earth
(Engine: Cranking or 3,000 r/min) OK
OK: 0.3 – 3.0 V Check trouble symptom.
OK NG
NG
Replace the engine-ECU. Check the harness wire Repair
between the engine-ECU
and the ignition failure
sensor connector.
OK
Replace the ignition failure sensor.
 MPI – Troubleshooting 13B-65
DATA LIST REFERENCE TABLE
NOTE
*1: In a new vehicle [driven approximately 500 km or less], the air intake plenum pressure is sometimes
10 % higher than the standard pressure.
*2: The injector drive time represents the time when the cranking speed is at 250 r/min or below when
the power supply voltage is 11 V.
*3: In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10 %
longer than the standard time.
*4: In a new vehicle [driven approximately 500 km or less], the step of the stepper motor is sometimes
30 steps greater than the standard value.

Item Inspection Inspection contents Normal condition Inspection Reference

No. item procedure page
No.

11 Oxygen Engine: After having When at 4,000 r/min, 200 mV or less Code No. 13B-19
sensor warmed up engine is suddenly P0130
(front) Air/fuel mixture is decelerated
made leaner when
decelerating, and is When engine is 600 – 1,000 mV
made richer when suddenly raced
racing.

Engine: After having Engine is idling 400 mV or less

warmed up (Changes)
The oxygen sensor 600 – 1,000 mV
signal is used to
check the air/fuel
mixture 2,500 r/min
ratio, and control
condition is also
checked by the ECU.

13 Intake air Ignition switch: ON or When intake air –20C Code No. 13B-12
temperature with engine running temperature is P0110
sensor –20C

When intake air 0C

temperature is 0C

When intake air 20C

temperature is 20C

When intake air 40C

temperature is 40C

When intake air 80C

temperature is 80C

14 Throttle Ignition switch: ON Set to idle position 300 – 1,000 mV Code No. 13B-16
position P0120
sensor Gradually open Increases in
proportion to
throttle opening
angle

Open fully 4,500 – 5,500 mV

13B-66 MPI – Troubleshooting

Item Inspection Inspection contents Normal condition Inspection Reference

No. item procedure page
No.

16 Power Ignition switch: ON System voltage Procedure 13B-59

supply No. 25
voltage

18 Cranking Ignition switch: ON Engine: Stopped OFF Procedure 13B-61

signal No. 27
(ignition
Engine: Cranking ON
switch-ST)

21 Engine Ignition switch: ON or When engine –20C Code No. 13B-13

coolant with engine running coolant temperature P0115
temperature is –20C
sensor
When engine 0C
coolant temperature
is 0C

When engine 20C

coolant temperature
is 20C

When engine 40C

coolant temperature
is 40C

When engine 80C

coolant temperature
is 80C

22 Crank  Engine: Cranking Compare the engine Accord Code No. 13B-25
angle sen-  Tachometer: speed readings on
sor Connected the tachometer and P0335
the MUT-II.

 Engine: Idling When engine 1,475 – 1,675

 Idle position coolant temperature r/min
switch: ON is –20C

When engine 1,345 – 1,545

coolant temperature r/min
is 0C

When engine 1,200 – 1,400

coolant temperature r/min
is 20C

When engine 1,160 – 1,225

coolant temperature r/min
is 40C

When engine 650 – 850 r/min

coolant temperature
is 80C

24 Vehicle Drive at 40 km/h Approximately 40 Code No. 13B-35

speed sen- km/h P0500
sor
 MPI – Troubleshooting 13B-67

Item Inspection Inspection contents Normal condition Inspection Reference

No. item procedure page
No.

27 Power Engine: Idling Steering wheel OFF Procedure 13B-61

steering fluid stationary No. 28
pressure
switch Steering wheel ON
turning

28 A/C switch Engine: Idling A/C switch: OFF OFF Procedure 13B-62
(when A/C switch is No. 29
ON, A/C compressor
A/C switch: ON ON
should be operating.)

32 Vacuum  Engine coolant Engine: Stopped 101 kPa Code No. 13B-10
sensor*1 temperature: 80 – (At altitude of 0 m) P0105
95C
 Lamps, electric Engine: Stopped (At 95 kPa
cooling fan and all altitude of 600 m)
accessories: OFF
 Transmission: Engine: Stopped (At 88 kPa
Neutral altitude of 1,200 m)
 Ignition switch: ON
Engine: Stopped (At 81 kPa
altitude of 1,800 m)

Engine: Idling 24.3 – 37.7 kPa

When engine is Increases

suddenly raced

33 Electrical All accessories: OFF Lighting switch only: OFF → ON Procedure 13B-62
load switch OFF → ON No. 30

41 Injectors*2 Engine: Cranking When engine 13 – 23 ms – –

coolant temperature
is 0C (injection is
carried out for all
cylinders
simultaneously)

When engine 26 – 46 ms
coolant temperature
is 20C

When engine 8 – 12 ms
coolant temperature
is 80C
13B-68 MPI – Troubleshooting

Item Inspection Inspection contents Normal condition Inspection Reference

No. item procedure page
No.

41 Injectors*3  Engine coolant Engine is idling 1.7 – 2.9 ms – –

temperature:
80 – 95C
 Lamps, electric 2,500 r/min 1.4 – 2.6 ms
cooling fan and all
accessories: OFF When engine is Increases
 Transmission: suddenly raced
Neutral

44 Ignition  Engine: After Engine is idling 0 – 20 BTDC – –

coils and having warmed up
power  Timing lamp is set.
transistors (The timing lamp is
set in order to 2,500 r/min 19 – 39 BTDC
check actual
ignition timing.)

45 ISC  Engine coolant A/C switch: OFF 2 – 25 STEP – –

(stepper) temperature:
motor 80 – 95C
position*4  Lamps, electric
cooling fan and all
accessories: OFF
 Transmission: A/C switch: Increases by
Neutral
OFF → ON 10 – 70 steps
 Engine: Idling
 When A/C switch is
ON, A/C
compressor should
be operating

49 A/C relay Engine: After having A/C switch: OFF OFF (Compressor Procedure 13B-62
warmed up/Engine is clutch is not No. 29
idling operating)

A/C switch: ON ON (Compressor

clutch is
operating)

59 Oxygen  Transmission: 3,500 r/min 600 – 1,000 mV Code No. 13B-22

sensor 2nd gear P0136
(rear)  Drive with throttle
widely open
 MPI – Troubleshooting 13B-69

Item Inspection Inspection contents Normal condition Inspection Reference

No. item procedure page
No.

81 Long-term Engine: Warm, 2,500 r/min without any load –12.5 – 12.5 % Code No. 13B-25
fuel com- (during closed loop) P0170
pensation

82 Short-term Engine: Warm, 2,500 r/min without any load –17 – 17 % Code No. 13B-25
fuel com- (during closed loop) P0170
pensation

87 Calculation Engine: Warm Engine: Idling 20 – 33 % – –

load value
2,500 r/min 20 – 33 %

88 Fuel control Engine: Warm 2,500 r/min Closed loop Code No. 13B-18
condition P0125
When engine is Open loop – drive
suddenly raced condition

A1 Oxygen Engine: After having When at 4,000 0.2 V or less Code No. 13B-19
sensor warmed up r/min, engine is P0130
(front) Air/fuel mixture is suddenly deceler-
made leaner when ated
decelerating and is
decelerating,
made richer when When engine is 0.6 – 1.0 V
racing. sudden racing

Engine: After having Engine is idling 0.4 V or less

warmed up (Changes)
The oxygen sensor 0.6 – 1.0 V
signal is used to
check the air/fuel
mixture ratio, and 2,500 r/min
control condition is
also checked by the
engine-ECU.

A2 Oxygen  Transmission: 2nd 3,500 r/min 0.6 – 1.0 V Code No. 13B-22
sensor gear P0136
(rear)  Drive with throttle
widely open

8A Throttle  Ignition switch: ON Set to idle position 6 – 20 % Code No. 13B-16

position P0120
sensor Gradually open Increase in
(Throttle proportion to
opening throttle opening
angle) angle

Open fully 80 – 100 %

13B-70 MPI – Troubleshooting

ACTUATOR TEST REFERENCE TABLE

Item Inspection Drive contents Inspection contents Normal condition Inspection Reference
No. item procedure page
No.

01 Injectors Cut fuel to No. 1 Engine: Idling condition Code No. 13B-26
injector After having warmed up/En- becomes different P0201
gine is idling (becomes unstaunsta-
02 Cut fuel to No. 2 (Cut the fuel supply to each ble). Code No.
injector injector
j in turn and check P0202
cylinders
li d which
hi h d
don’t
’t affect
ff t
03 Cut fuel to No. 3 idling.) Code No.
injector P0203

04 Cut fuel to No. 4 Code No.

injector P0204

07 Fuel pump Fuel pump  Engine: Pinch the Pulse is felt. Procedure 13B-60
operates and Cranking return hose No. 26
fuel is recircu-  Fuel with fingers
lated. pump: to feel the
Forced pulse of the
driving fuel being
Inspect recirculated.
according
to Listen near Sound of operation
both the the fuel tank is heard.
above for the
condi- sound of fuel
tions. pump
operation.

08 Purge Solenoid valve Ignition switch: ON Sound of operation Code No. 13B-34
control turns from OFF can be heard when P0443
solenoid to ON. solenoid valve is
valve driven.

10 EGR Solenoid valve Ignition switch: ON Sound of operation Code No. 13B-32
control turns from OFF can be heard when P0403
solenoid to ON. solenoid valve is
valve driven.

20 Condenser Drive the fan  Ignition switch: ON Fan motor runs Procedure 13B-23
fan motors  A/C switch: ON No. 23
(condenser)

21 Radiator Drive the fan  Ignition switch: ON Fan motor runs Procedure 13B-23
fan motors No. 23
(radiator)
 MPI – Troubleshooting 13B-71
CHECK AT THE ENGINE-ECU TERMINALS
TERMINAL VOLTAGE CHECK CHART
The following items have been added. The ignition timing adjustment terminal (terminal No. 52) has been
discontinued.

Terminal No. Check item Check condition Normal condition

10 Ignition coil – No. 1, Engine r/min: 3,000 r/min 0.3 – 3.0 V

No. 4 (Ignition power
transistor)

23 Ignition coil – No. 2, Engine r/min: 3,000 r/min 0.3 – 3.0 V

No. 3 (Ignition power
transistor)

58 Engine ignition signal Engine r/min: 3,000 r/min 0.3 – 3.0 V

88 Camshaft position Engine: Cranking 0.4 – 3.0 V

sensor
Engine: Idling 0.5 – 2.0 V

CHECK CHART FOR RESISTANCE AND CONTINUITY BETWEEN TERMINALS

Terminal No. Check item Normal condition (check condition)

54 – 12 Oxygen sensor heater (rear) 4.5 – 8.0 Ω (at 20C)

60 – 12 Oxygen sensor heater (front) 11 – 18 Ω (at 20C)

13B-72 MPI – Troubleshooting

Camshaft position sen-

Analyzer INSPECTION PROCEDURE USING AN
sor connector
ANALYZER
Special patterns
pick-up CAMSHAFT POSITION SENSOR AND CRANK ANGLE
SENSOR
Measurement Method
1. Disconnect the camshaft position sensor connector and
connect the special tool (test harness: MB991709) in
between. (All terminals should be connected.)
Crank angle
sensor connector 2. Connect the analyzer special patterns pickup to camshaft
position sensor terminal 2.
3. Disconnect the crank angle sensor connector and connect
the special tool (test harness: MD998478) in between.
4. Connect the analyzer special patterns pickup to crank
angle sensor terminal 2.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal 88. (When checking the camshaft
position sensor signal wave pattern.)
2. Connect the analyzer special patterns pickup to
engine-ECU terminal 89. (When checking the crank angle
sensor signal wave pattern.)
Standard Wave Pattern
Observation conditions
Function Special patterns

Pattern height Low

Pattern selector Display

Engine r/min Idle speed

 MPI – Troubleshooting 13B-73
Standard wave pattern

2 engine revolutions
(1 camshaft revolution)
(V) The time (cycle time) T is
75BTDC reduced when the engine
5BTDC speed increases

Crank angle
sensor output
wave pattern

0
130° 50° 145° 35°

Camshaft posi-
tion sensor out-
put wave pat-
tern

Time
0
No. 1 No. 3 TDC No. 4 No. 2
TDC TDC TDC
TDC: Top dead centre

Wave Pattern Observation Points

Check that cycle time T becomes shorter when the engine speed increases.

Examples of Abnormal Wave Patterns

 Example 1
Cause of problem
Sensor interface malfunction
Wave pattern characteristics
Rectangular wave pattern is output even when the engine
is not started.

 Example 2
Cause of problem
Loose timing belt
Abnormality in sensor disk
Wave pattern characteristics
Wave pattern is displaced to the left or right.
13B-74 MPI – Troubleshooting

Special patterns pickup IDLE SPEED CONTROL (ISC) SERVO (STEPPER

MOTOR)
Analyzer
Measurement Method
1. Disconnect the ISC servo connector, and connect the
special tool (test harness: MB991709) in between. (All
terminals should be connected.)
2. Connect the analyzer special patterns pickup to the ISC
servo-side connector terminal 1, terminal 3, terminal 4
and terminal 6 respectively.

Alternate Method (Test harness not available)

1. Connect the analyzer special patterns pickup to
engine-ECU terminal 4, connection terminal 5, connection
terminal 17, and connection terminal 18 respectively.

Standard Wave Pattern

Observation conditions
Function Special patterns

Pattern height High

Pattern selector Display

Engine condition When the engine coolant temperature is 20C or below, turn the ignition switch
from OFF to ON (without starting the engine).

While the engine is idling, turn the A/C switch to ON.

Immediately after starting the warm engine

Standard wave pattern

(V)
Point B Point A
The wave pattern Induced electro-
appears for an Coil reverse
electromotive force motive force from
instant, but soon the motor turning
30 disappears. (Approx. 3 × 10 V)

20

10

ISC
servo
control
signal
pat-
tern Time
 MPI – Troubleshooting 13B-75
Wave Pattern Observation Points
Check that the standard wave pattern appears when the ISC servo is operating.
Point A: Presence or absence of induced electromotive force from the motor turning. (Refer to the abnormal
wave pattern.)

Contrast with standard wave pattern Probable cause

Induced electromotive force does not appear or is extremely small. Motor is malfunctioning

Point B: Height of coil electromotive force

Contrast with standard wave pattern Probable cause

Coil reverse electromotive force does not appear or is extremely small. Short in the coil

Examples of Abnormal Wave Pattern

 Example 1
Cause of problem
Motor is malfunctioning. (Motor is not operating.)
Wave pattern characteristics
Induced electromotive force from the motor turning does
not appear.

 Example 2
Open
circuit Cause of problem
side Open circuit in the line between the ISC servo and the
engine-ECU.
Wave pattern characteristics
Current is not supplied to the motor coil on the open circuit
side. (Voltage does not drop to 0 V.)
Normal Furthermore, the induced electromotive force waveform
side at the normal side is slightly different from the normal
waveform.
13B-76 MPI – Troubleshooting

Analyzer IGNITION COIL AND POWER TRANSISTOR

Power transistor control signal
Measurement Method
1. Disconnect the ignition coil connector, and connect the
special tool (test harness: MB991348) in between. (All
terminals should be connected.)
Special 2. Connect the analyzer special patterns pickup to terminal
patterns 3 of each ignition coil connector in turn.
pickup
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal 10 (No. 1 – No. 4), terminal 23 (No.
2 – No. 3) respectively.

Standard Wave Pattern

Observation condition
Function Special patterns

Pattern height Low

Pattern selector Display

Engine r/min Approx. 1,200 r/min

Standard wave pattern

(V) T
T: Revolution time corresponding to a crank angle of 180
6 75BTDC 5BTDC Compression top dead center

4
Crank angle
sensor output
wave pattern 2

0
Ignition period
4 T1 θ θ: Spark
Power transis- advance
tor control signal angle
wave pattern 2

0
OFF ON

Dwell section
Time
T1: Time computed by the engine-ECU
 MPI – Troubleshooting 13B-77
Wave Pattern Observation Points
Point: Condition of wave pattern build-up section and maximum voltage (Refer to abnormal wave pattern
examples 1 and 2.)

Condition wave pattern build-up section and maximum Probable cause

voltage

Rises from approx. 2 V to approx. 4.5 V at the top-right Normal

2V rectangular wave Open-circuit in ignition primary circuit

Rectangular wave at power voltage Power transistor malfunction

Examples of Abnormal Wave Pattern

--- Normal wave pattern
 Example 1
Wave pattern during engine cranking
Cause of problem
2V Open-circuit in ignition primary circuit
Wave pattern characteristics
Top-right part of the build-up section cannot be seen, and
voltage value is approximately 2 V too low.

--- Normal wave pattern

 Example 2
Wave pattern during engine cranking
VB Cause of problem
Malfunction in power transistor
Wave pattern characteristics
Power voltage results when the power transistor is ON.
13B-78 MPI – On-vehicle Service

ON–VEHICLE SERVICE
BASIC IDLE SPEED ADJUSTMENT
NOTE
(1) The standard idling speed has been adjusted by the
speed adjusting screw (SAS) by the manufacturer,
and there should usually be no need for readjustment.
(2) If the adjustment has been changed by mistake, the
idle speed may become too high or the idle speed
may drop too low when loads from components such
as the A/C are placed on the engine. If this occurs,
adjust by the following procedure.
(3) The adjustment, if made, should be made after first
confirming that the spark plugs, the injectors, the idle
speed control servo, the compression pressure, etc.,
are all normal.
1. Before inspection and adjustment, set the vehicle to the
pre-inspection condition.
2. Connect the MUT-II to the diagnosis connector (16-pin).
NOTE
When the MUT-II is connected, the diagnosis control
terminal should be earthed.
3. Start the engine and run at idle.
4. Select the item No. 30 of the MUT-II Actuator test.
NOTE
This holds the ISC servo at the basic step to adjust the
basic idle speed.
5. Check the idle speed.
Standard value: 750 ± 50 r/min
NOTE
(1) The engine speed may be 20 to 100 r/min lower than
indicated above for a new vehicle [driven
approximately 500 km or less], but no adjustment is
necessary.
(2) If the engine stalls or the engine speed is low even
though the vehicle has been driven approximately 500
km or more, it is probable that deposits are adhered
to the throttle valve, so clean it.

6. If not within the standard value range, turn the speed

adjusting screw (SAS) to make the necessary adjustment.
7. Press the MUT-II clear key, and release the ISC servo
from the Actuator test mode.
 MPI – On-vehicle Service 13B-79
NOTE
Unless the ISC servo is released, the Actuator test mode
will continue 27 minutes.

8. Switch OFF the ignition switch.

9. Disconnect the MUT-II.
10. Start the engine again and let it run at idle speed for
about 10 minutes; check that the idling condition is normal.

COMPONENT LOCATION
Name Symbol Name Symbol

Camshaft position sensor B Ignition failure sensor B

Crank angle sensor C Oxygen sensor (front) D

Ignition coil A Oxygen sensor (rear) E

A B

C D E
13B-80 MPI – On-vehicle Service

Equipment side connector INTAKE AIR TEMPERATURE SENSOR CHECK

1. Disconnect the vacuum sensor connector.
2. Measure resistance between terminals 1 and 3.
Vacuum
sensor Standard value:
2.3 – 3.0 kΩ (at 20C)
0.30 – 0.42 kΩ (at 80C)
3. Remove the vacuum sensor.

4. Measure resistance while heating the sensor using a hair

drier.
Normal condition:
Temperature (C) Resistance (kΩ)
Higher Smaller
5. If the value deviates from the standard value or the
Vacuum sensor resistance remains unchanged, replace the vacuum
sensor.
6. Install the vacuum sensor and tighten it to the specified
torque.
Tightening torque: 13 – 15 Nm

Equipment OXYGEN SENSOR CHECK

side connector
<Oxygen sensor (front)>
1. Disconnect the oxygen sensor connector and connect the
special tool (test harness) to the connector on the oxygen
sensor side.

Oxygen sensor

2. Make sure that there is continuity (4.5 – 8.0 Ω at 20C)

between terminal 1 (red clip of special tool) and terminal
Oxygen 3 (blue clip of special tool) on the oxygen sensor connector.
sensor 3. If there is no continuity, replace the oxygen sensor.
Red equip-
ment side
4. Warm up the engine until engine coolant is 80C or higher.
connector
Blue

MD998464
 MPI – On-vehicle Service 13B-81
5. Use a jumper wire to connect terminal 1 (red clip) of the
Jumper
wire oxygen sensor connector to the battery (+) terminal and
terminal 3 (blue clip) to the battery (–) terminal.
White Caution
Red
Be very careful when connecting the jumper wire;
incorrect connection can damage the oxygen sensor.
Blue 6. Connect a digital voltage meter between terminal 2 (black
Black
clip) and terminal 4 (white clip).

MD998464

7. While repeatedly racing the engine, measure the oxygen

sensor output voltage.
Standard value:
Engine Oxygen sensor Remarks
output voltage
When 0.6 – 1.0 V If you make the air/fuel ratio
racing the rich by racing the engine
engine repeatedly, a normal oxy-
gen sensor will output a
voltage of 0.6 – 1.0 V.
8. If the sensor is defective, replace the oxygen sensor.
NOTE
For removal and installation of the oxygen sensor, refer
to GROUP 15 – Exhaust Pipe and Main Muffler.

Equipment side Oxygen sensor <Oxygen sensor (rear)>

connector (rear) 1. Disconnect the oxygen sensor connector and connect the
special tool (test harness set) to the connector on the
oxygen sensor side.
2. Make sure that there is continuity (11 – 18 Ω at 20C)
between terminal 3 and terminal 4 on the oxygen sensor
connector.
3. If there is no continuity, replace the oxygen sensor.
NOTE
(1) If the MUT-II does not display the standard value
although no abnormality is found by the above
mentioned continuity test and harness check, replace
the oxygen sensor (rear).
(2) For removal and installation of the oxygen sensor,
refer to GROUP 15 – Exhaust Pipe and Main Muffler.
MB991223
13B-82 MPI – Fuel Injector

FUEL INJECTOR
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
 Prevention of Fuel Discharge <before removal only>  Accelerator Cable Adjustment
 Fuel Leak Check <after installation only>

5.0 Nm
1 Apply engine oil to all
O-rings during
installation.

5.0 Nm
3 10 – 1 2 N m
4

16
8.8 Nm 6
7
9.8 – 12 Nm 5
8

13
14
17 12
15
10 9
11

Removal steps
1. Accelerator cable connection A 10. Insulator
2. Fuel injector connector 11. Insulator
3. Vacuum hose connection A 12. Fuel injector assembly
4. Fuel return hose connection A 13. O-ring
A 5. Fuel pressure regulator 14. Grommet
A 6. O-ring 15. Fuel injector
A 7. High-pressure fuel hose connection 16. Harness bracket
A 8. O-ring 17. Delivery pipe
A 9. Delivery pipe and fuel injector
assembly
MPI – Fuel Injector 13B-83
REMOVAL SERVICE POINT
A DELIVERY PIPE AND FUEL INJECTOR
ASSEMBLY REMOVAL
Remove the delivery pipe (with the injectors attached to it).
Caution
Care must be taken, when removing the delivery pipe,
not to drop the injector.

INSTALLATION SERVICE POINT

A O-RING/FUEL INJECTOR ASSEMBLY/
HIGH-PRESSURE FUEL HOSE/FUEL PRESSURE
REGULATOR INSTALLATION
1. Apply a drop of new engine oil to the O-ring.
Caution
Be sure not to let engine oil enter the delivery pipe.
2. While turning the injector, high-pressure fuel hose and
fuel pressure regulator to the right and left, install the
delivery pipe, while being careful not to damage the O-ring.
After installing, check that the hose turns smoothly.
3. If it does not turn smoothly, the O-ring may be trapped,
remove the injector, high-pressure fuel hose or fuel
pressure regulator and then re-insert it into the delivery
pipe and check once again.
4. Tighten the high-pressure fuel hose and fuel pressure
regulator to the specified torque.
Tightening torque:
5.0 Nm (High-pressure fuel hose)
8.8 Nm (Fuel pressure regulator)
13B-84 MPI – Throttle Body

THROTTLE BODY
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
 Engine Coolant Draining  Accelerator Cable Adjustment <after installation>
 Air Intake Hose Removal and Installation

2
5.0 Nm
19 Nm
1

3
7

Removal steps
1. Accelerator cable connection 5. Vacuum hose connection
2. Throttle position sensor connector 6. Vacuum pipe and hose assembly
3. Idle speed control servo connector 7. Throttle body
4. Water hose connection A 8. Throttle body gasket

INSTALLATION SERVICE POINT

A THROTTLE BODY GASKET INSTALLATION
Projection
Install the throttle body gasket with its projection facing as
shown in the illustration.
 13C-1

FUEL SUPPLY

CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SPECIAL TOOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Outline of Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
FUEL TANK <F9QT> . . . . . . . . . . . . . . . . . . . . . . . . 3
13C-2 FUEL SUPPLY – General/Special Tool

GENERAL
OUTLINE OF CHANGE
The following service procedures have been established to correspond to the addition of the F9QT diesel
engine. Other service procedures are the same as before.

SPECIAL TOOL
Tool Number Name Use
MB996009 Tank cap wrench Installation of tank cap
 FUEL SUPPLY – Fuel Tank <F9QT> 13C-3
FUEL TANK <F9QT>
REMOVAL AND INSTALLATION
Pre-removal Operation Post-installation Operation
 Draining the Fuel  Refilling the Fuel
 Checking for Fuel Leaks

49 Nm 5 Nm
5
49 Nm 12
10 9
3 49 Nm

3 Nm
11
1 13
7
14
1 15

16
3 Nm 1 5 Nm
2
30 Nm
9
4
6
3 Nm
30 Nm
8
5.0 Nm
7 30 Nm
3 Nm

Removal steps
1. Fuel hoses connection 9. Fuel hoses
2. Harness clamp A B 10. Cap
3. Toe control link support bar A 11. Fuel pump module
4. Band (RH) 12. Fuel filler cap
5. Fuel pump module connector 13. Fuel rubber drain
6. Fuel tank assembly 14. Filler neck assembly
7. Heat protector 15. Leveling hose
8. Band (LH) 16. Filler hose

REMOVAL SERVICE POINT

A CAP REMOVAL
MB996009
13C-4 FUEL SUPPLY – Fuel Tank <F9QT>

INSTALLATION SERVICE POINTS

Mating range A FUEL PUMP MODULE INSTALLATION
1. Check to be sure that the fuel tank packing is not damaged
or deformed, and then securely install the packing to the
fuel tank.
Caution
If the packing is installed to the fuel pump module,
Mating packing lip will be damaged when installing the fuel
marks
pump module to the fuel tank and the fuel leak will
result.
NOTE
OK
If the packing is damaged or deformed, replace the
(Not good)
defective packing with a new packing.
2. Apply soapy water to the inside of the packing. Align the
mating marks on the fuel tank and fuel pump module
as shown in the illustration, and then install the fuel pump
Packing module to the fuel tank.
Caution
(1) Do not tilt the fuel pump module when installing.
(2) The packing should not be folded over as shown
by (A) in the illustration.
B CAP INSTALLATION
Apply soapy water to the cap thread, and the use the special
MB996009 tool as the same manner as for removal to tighten the cap
to the specified torque.
Tightening torque: 49 Nm
Caution
Prevent the fuel pump module from turning with the cap
when tightening the cap.
 13D-1

DIESEL FUEL

CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Engine Coolant Temperature Sensor

Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Outline of Change . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accelerator Pedal Position Sensor
GENERAL INFORMATION . . . . . . . . . . . . . . . . 2 (1st channel) Check . . . . . . . . . . . . . . . . . . . . . . 52
Accelerator Pedal Position Sensor
SERVICE SPECIFICATIONS . . . . . . . . . . . . . . 4 (2nd channel) Check . . . . . . . . . . . . . . . . . . . . . 53
Injector Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . 4
Fuel Temperature Sensor Check . . . . . . . . . . 53
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . 5 Fuel Pressure Regulator Check . . . . . . . . . . . 54
Crank Angle Sensor Check . . . . . . . . . . . . . . . 54
ON-VEHICLE SERVICE . . . . . . . . . . . . . . . . . 51
Throttle Valve Control Solenoid Check . . . . . 54
Component Location . . . . . . . . . . . . . . . . . . . . . 51
Throttle Actuator Check . . . . . . . . . . . . . . . . . . . 54
Main Relay Continuity Check . . . . . . . . . . . . . 52
Intake Air Temperature Sensor Check . . . . . 52 FUEL HIGH PRESSURE PUMP
AND FUEL INJECTOR . . . . . . . . . . . . . . . . . . 55
13D-2 DIESEL FUEL – General/General Information

GENERAL
OUTLINE OF CHANGE
The following maintenance service points have been established to correspond to the adoption of the
F9Q1 engine.
GENERAL INFORMATION
The common rail fuel injection system consists of activities such as fuel injection control and idle speed
sensors which detect the condition of the diesel control. In addition, the engine-ECU is equipped with
engine, an engine-ECU which controls the system several self-diagnosis functions which make trouble-
based on signals from these sensors, and actuators shooting easier in the event that a problem develops.
which operate according to control commands from
the engine-ECU. The engine-ECU carries out

FUEL INJECTION CONTROL

The injector drive time and the timing are controlled the electronic fuel pump to the high pressure pump.
so that the appropriate quantities of fuel are supplied The high pressure pump increases the fuel pressure
to the engine in response to engine conditions which to the pressure which is required for high-pressure
can change frequently. A single injector is mounted injection, and then send the fuel to each injector.
at each cylinder. The fuel is sent from the fuel tank by

SELF-DIAGNOSIS FUNCTION
 When an abnormality is detected in any of the  The RAM data relating to the sensors and
sensors or actuators, the engine warning lamp actuators which is stored in the engine-ECU
illuminates to warn the driver. can be read using the MUT-II. In addition, the
 When an abnormality is detected in any of the actuators can be force-driven under certain
sensors or actuators, a diagnosis code number conditions.
corresponding to the problem which occurred
is output.

OTHER CONTROL FUNCTIONS

1. A/C Relay Control 5. Throttle Valve Control
Turn the compressor clutch of the A/C ON and The throttle valve control solenoid controls
OFF. vacuum pressure to the throttle actuator to open
2. Glow Control and close the throttle valve.
Refer to GROUP 16. 6. Boost Pressure Control
3. Fan Control Turbocharger waste gate solenoid controls
The revolutions of the radiator fan and vacuum pressure to the waste gate actuator
condenser fan are controlled in response to to control boost pressure.
the engine coolant temperature and vehicle 7. Additional Heater Control
speed. Refer to GROUP 55.
4. EGR Control
Refer to GROUP 17.
 DIESEL FUEL – General Information 13D-3
FUEL INJECTION SYSTEM DIAGRAM
1 Air flow sensor  Power supply Engine- 1 Injector  Main relay
2 Intake air temper-  Ignition switch – ECU 2 Fuel pressure  Glow relay box
ature sensor IG regulator  A/C relay
3 Camshaft position  Accelerator pedal 3 EGR valve  Additional heater
sensor position sensor 4 Turbocharger relay
4 Crank angle (1st channel) waste gate  Fan motor relay
sensor  Accelerator pedal 5 Throttle valve  Engine warning
5 Boost sensor position sensor control solenoid lamp
6 Engine coolant (2nd channel) 6 Glow plug  Glow indicator
temperature  Vehicle speed lamp
sensor sensor  Overheat indicator
7 Fuel pressure  A/C switch lamp
sensor  Stop lamp switch  Diagnostic output
8 EGR valve  Clutch pedal terminal
position sensor switch
9 Fuel temperature  Diagnostic control
sensor terminal

8 EGR valve position sensor 9 Fuel temperature sensor

5 Throttle valve control solenoid 1 Injector

To vacuum pump
To fuel tank
4 Turbocharger waste
gate solenoid 2 Fuel pressure From fuel tank
regulator
3 EGR Fuel filter
valve
5 Boost
sen- High pressure
sor pump

1 Air flow sensor 7 Fuel pressure sensor

Air cleaner 6 Glow plug

3 Camshaft 6 Engine coolant temperature sensor

position
sensor
Turbocharger 4 Crank angle sensor
Catalytic
2 Intake air converter
temperature sensor

Catalytic converter
13D-4 DIESEL FUEL – Service Specifications/Special Tools

SERVICE SPECIFICATIONS
Items Specifications

Intake air temperature sensor at –30C 24.0 – 27.2

resistance kΩ
at 20C 2.35 – 2.55

at 100C 0.180 – 0.186

Engine coolant temperature sensor at 25C 2.14 – 2.36

resistance kΩ
at 80C 0.27 – 0.29

Accelerator pedal position sensor (1st channel) Approx. 1,200

Resistance between terminals (3) and (5) Ω

Accelerator pedal position sensor (2nd channel) Approx. 1,700

Resistance between terminals (2) and (6) Ω

Injector coil resistance Ω (at 20C) Approx. 0.33

Fuel temperature sensor resistance kΩ (at 25C) 2.05

Fuel pressure regulator Ω (at 20C) Approx. 5

Crank angle sensor resistance Ω 720 – 880

Throttle valve control solenoid coil resistance Ω (at 25C) 43 – 49

SPECIAL TOOLS
Tool Number Name Use
MB991502 MUT-II sub  Reading diagnosis code
assembly  Checking the fuel injection system

MB990767 End yoke holder Holding the fuel high pressure pump sprocket

MD998719 Crankshaft pulley

holder pin
 DIESEL FUEL – Troubleshooting 13D-5
TROUBLESHOOTING
DIAGNOSIS TROUBLESHOOTING FLOW
Refer to ’99 SPACE STAR Workshop Manual (Pub. No.
CMXE99E1), GROUP 00 – How to Use Troubleshooting/In-
spection Service Points.

DIAGNOSIS FUNCTION
ENGINE WARNING LAMP (CHECK ENGINE LAMP)
If an abnormality occurs in any of the items related to the
electronic controlled injection system, the engine warning lamp
will illuminate.
If the lamp remains illuminated or if the lamp illuminates while
the engine is running, check the diagnosis code output.

Engine warning lamp NOTE

(Check engine lamp) When the ignition switch is ON, the engine warning lamp
illuminates as checking of the engine warning lamp circuit
and the bulb, and then the warning lamp is extinguished after
a few seconds.
METHOD OF READING AND ERASING DIAGNOSIS
CODES
Refer to ’99 SPACE STAR Workshop Manual (Pub. No.
CMXE99E1), GROUP 00 – How to Use Troubleshooting/In-
spection Service Points.
INSPECTION USING MUT-II DATA LIST AND
ACTUATOR TESTING
1. Carry out inspection by means of the data list and the
actuator test function.
If there is an abnormality, check and repair the chassis
harnesses and components.
2. After repairing, re-check using the MUT-II and check that
the abnormal input and output have returned to normal
as a result of the repairs.
3. Erase the diagnosis code memory.
4. Remove the MUT-II.
5. Start the engine again and carry out a road test to confirm
that the problem has disappeared.
13D-6 DIESEL FUEL – Troubleshooting

FAIL-SAFE FUNCTION REFERENCE TABLE

Malfunctioning item Control contents during malfunction

Crank angle sensor system Engine cut-off

Camshaft position sensor system Engine cut-off

Fuel pressure sensor system Engine cut-off

Boost sensor system  Turbocharger waste gate control is stopped

 EGR control is stopped

Air flow sensor system EGR control is stopped

Engine coolant temperature sensor sys-  The coolant temperature is regulated as specified
tem  The radiator fan is driven

Intake air temperature sensor system Thermoplunger control is stopped

EGR valve position sensor system EGR control is stopped

Immobilizer system The engine is immobilized. However, the engine is not cut-off while the
engine is running

EGR valve system  Turbocharger waste gate control is stopped

 EGR control is stopped

Turbocharger waste gate solenoid system  Turbocharger waste gate control is stopped
 EGR control is stopped

Fuel pressure regulator system Engine cut-off

Fuel pressure system Engine cut-off

Engine-ECU Engine cut-off

Additional heater relay system Thermoplunger control is stopped

 DIESEL FUEL – Troubleshooting 13D-7
INSPECTION CHART FOR DIAGNOSIS CODES
Caution
Check that the engine-ECU earth circuit is normal before checking for the cause of the problem.

Code No. Diagnosis item Reference page

11 Crank angle sensor system 13D-8
12 Camshaft position sensor system 13D-9
13 Accelerator pedal position sensor (1st channel) system 13D-10
14 Accelerator pedal position sensor (2nd channel) system 13D-11
15 Fuel pressure sensor system 13D-12
16 Boost sensor system 13D-13
17 Barometric pressure sensor system 13D-14
18 Air flow sensor system 13D-15
19 Engine coolant temperature sensor system 13D-16
21 Fuel temperature sensor system 13D-17
22 Intake air temperature sensor system 13D-18
23 EGR valve position sensor system 13D-19
24 Glow relay box system 13D-20
25 Immobilizer system 13D-21
26 EGR valve system 13D-22
27 Turbocharger waste gate solenoid system 13D-23
28 Fuel pressure regulator system 13D-24
29 No. 1 injector system 13D-25
31 No. 2 injector system 13D-25
32 No. 3 injector system 13D-26
33 No. 4 injector system 13D-26
34 Glow plug system 13D-27
35 Vehicle speed sensor system 13D-27
36 Fuel pressure system 13D-28
37 Throttle valve control solenoid system 13D-29
38 Engine-ECU 13D-30
40 Additional heater relay system 13D-30
41 Fan control relay (low) system 13D-31
42 Stop lamp switch system 13D-31
43 Clutch pedal switch system 13D-32
44 Power latch system 13D-32
45 Main relay system 13D-33
46 Power supply system 13D-34
47 ECU alimentation 13D-34
13D-8 DIESEL FUEL – Troubleshooting

INSPECTION PROCEDURE FOR DIAGNOSIS CODES

Code No. 11 Crank angle sensor system Probable cause
Range of Check  Malfunction of the crank angle sensor
 During engine running  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the crank angle
 Sensor output voltage does not change (no pulse signal input) sensor circuit
or  Malfunction of the engine-ECU
 Sensor output value is 5,000 r/min or more for 1 second

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
12 Crank angle sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent Malfunctions*
NG
NG
Check the crank angle sensor (Refer to P.13D-54.) Replace
OK
NG
Check the following connectors: A-114, A-121 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the crank angle sensor and Repair
the engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-9
Code No. 12 Camshaft position sensor system Probable cause
Range of Check  Malfunction of the camshaft position sensor
 During engine running  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the camshaft
 Sensor output voltage does not change for 0.5 second (no pulse signal position sensor circuit
input)  Malfunction of the engine-ECU
Range of Check
 During engine running
 Pulse signal detected two or more times
Set Conditions
 Not synchronized with crank angle sensor output
or
 Crank angle sensor output voltage does not change for 0.5 second (no
pulse signal input)

(1) NG
Measure at the camshaft position sensor connector A-104. Check the harness wire between the camshaft position sensor
 Disconnect the connector and measure at the harness and the main relay, and repair if necessary.
side.
(1) Voltage between and earth (Ignition switch: ON) (2) NG
OK: System voltage Check the following connector: A-120
(2) Continuity between and earth
OK: Continuity OK NG

OK Repair

Check trouble symptom.

NG NG
Check the following connector: A-104 Repair
OK
Check the harness wire between the camshaft position sensor
and the engine-ECU.
OK NG
Check trouble symptom.
Repair
NG
Replace the engine-ECU.

Replace the camshaft position sensor.

Check trouble symptom.

NG

Check the harness wire between the camshaft position NG

Repair
sensor and the engine-ECU (sensor signal line).
OK

Replace the engine-ECU.

13D-10 DIESEL FUEL – Troubleshooting

Code No. 13 Accelerator pedal position sensor (1st Probable cause

channel) system
Range of Check  Malfunction of the accelerator pedal position
 Ignition switch: ON sensor (1st channel)
Set Conditions  Improper connector contact, open circuit or
 Sensor output voltage is 200 mV or less short-circuited harness wire of the accelerator
or pedal position sensor (1st channel) circuit
 Sensor output voltage is 4,750 mV or more  Malfunction of the engine-ECU

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
09 Accelerator pedal position sensor (1st channel) Refer to GROUP 00 – Points to Note for Intermittent
(Refer to P.13D-46.) Malfunctions*
NG
NG
Check the accelerator pedal position sensor (1st channel) Replace
(Refer to P.13D-52.)
OK
NG
Measure at the accelerator pedal position sensor connector B-93. Check the following connectors: B-89, A-122
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 3 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 5 and earth Check trouble symptom.
OK: Continuity NG
OK
Check the harness wire between the accelerator pedal
position sensor and the engine-ECU.
OK NG

Repair
Replace the engine-ECU.
NG
Check the following connectors: B-89, B-93, A-122 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the accelerator pedal Repair
position sensor and the engine-ECU (sensor signal line).
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-11
Code No. 14 Accelerator pedal position sensor (2nd Probable cause
channel) system
Range of Check  Malfunction of the accelerator pedal position
 Ignition switch: ON sensor (2nd channel)
Set Conditions  Improper connector contact, open circuit or
 Sensor output voltage is 200 mV or less short-circuited harness wire of the accelerator
or pedal position sensor (2nd channel) circuit
 Sensor output voltage is 2,500 mV or more  Malfunction of the engine-ECU
Range of Check
 Ignition switch: ON
Set Conditions
 Output difference compared to accelerator pedal position sensor (1st
channel) is 6 % or more

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
09 Accelerator pedal position sensor (2nd channel) Refer to GROUP 00 – Points to Note for Intermittent
(Refer to P.13D-46.) Malfunctions*
NG
NG
Check the accelerator pedal position sensor (2nd channel) Replace
(Refer to P.13D-53.)
OK
NG
Measure at the accelerator pedal position sensor connector B-93. Check the following connectors: B-89, A-122
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 2 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 6 and earth Check trouble symptom.
OK: Continuity
NG
OK
Check the harness wire between the accelerator pedal
position sensor and the engine-ECU.
OK NG

Repair
Replace the engine-ECU.
NG
Check the following connectors: B-89, B-93, A-122 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the accelerator pedal Repair
position sensor and the engine-ECU (sensor signal line).
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-12 DIESEL FUEL – Troubleshooting

Code No. 15 Fuel pressure sensor system Probable cause

Range of Check  Malfunction of the fuel pressure sensor
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the fuel pressure
 Sensor output voltage is 250 mV or less sensor circuit
or  Malfunction of the engine-ECU
 Sensor output voltage is 4,750 mV or more
Range of Check
 During engine running
Set Conditions
 Fuel pressure varies greatly from command value

NG
MUT-II Data list Check trouble symptom.
07 Fuel pressure sensor (command value) NG
(Refer to P.13D-46.)
OK Replace the engine-ECU.

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
06 Fuel pressure sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Measure at the fuel pressure sensor connector A–119. Check the following connector: A-120, A-121
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 1 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 3 and earth Check trouble symptom.
OK: Continuity
NG
OK
Check the harness wire between the fuel pressure sensor and
the engine-ECU.
OK NG

Repair
Replace the engine-ECU.
NG
Check the following connectors: A-119, A-121 Repair
OK

Check trouble symptom.

NG
Replace the fuel pressure sensor.

Check trouble symptom.

NG
NG
Check the harness wire between the fuel pressure sensor Repair
and the engine-ECU (sensor signal line).
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-13
Code No. 16 Boost sensor system Probable cause
Range of Check  Malfunction of the boost sensor
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the boost sensor
 Sensor output voltage is 100 mV or less for 1 second circuit
or  Malfunction of the engine-ECU
 Sensor output voltage is 4,900 mV or more for 1 second
Range of Check
 Engine speed: 900 r/min or less
Set Conditions
 Variation from barometric pressure sensor output signal is 15 kPa or more
for 4.6 seconds

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
04 Boost sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Measure at the boost sensor connector A-122. Check the following connectors: A-120, A-121
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 1 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 3 and earth Check trouble symptom.
OK: Continuity
NG
OK
Check the harness wire between the boost sensor and the
engine-ECU.
OK NG

Repair
Replace the engine-ECU.
NG
Check the following connectors: A-112, A-121 Repair
OK

Check trouble symptom.

NG
Replace the boost sensor.

Check trouble symptom.

NG
NG
Check the harness wire between the boost sensor and the Repair
engine-ECU (sensor signal line).
OK
Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-14 DIESEL FUEL – Troubleshooting

Code No. 17 Barometric pressure sensor system Probable cause

Range of Check  Malfunction of the barometric pressure sensor
 Ignition switch: ON  Malfunction of the engine-ECU
Set Conditions
 Sensor output voltage is 200 mV or less for 1 second
or
 Sensor output voltage is 4,950 mV or more for 1 second

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
05 Barometric pressure sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*
NG

Check trouble symptom.

NG

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-15
Code No. 18 Air flow sensor system Probable cause
Range of Check  Malfunction of the air flow sensor
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the air flow sensor
 Sensor output voltage is 100 mV or less for 1.5 seconds circuit
or  Malfunction of the engine-ECU
 Sensor output voltage is 1,200 mV or more for 1.5 seconds
Range of Check
 Engine speed : 700 r/min or more
Set Conditions
 Sensor output is 10 kg/h or less for 1 second

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
08 Air flow sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
(1) NG
Measure at the air flow sensor connector A-73. Check the harness wire between the air flow sensor and the
 Disconnect the connector and measure at the harness main relay, and repair if necessary.
side.
(1) Voltage between 4 and earth (Ignition switch: ON) (2) NG
OK: System voltage Check the following connectors: A-120, A-121
(2) Voltage between 3 and earth (Ignition switch: ON) OK NG
OK: 4.8 – 5.2 V
(3) Continuity between 6 and earth (3) NG Repair
OK: Continuity
OK Check trouble symptom.
NG

Check the harness wire between the air flow sensor and the
Check the following connectors: A-73, A-121 engine-ECU.
OK NG OK NG

Repair
Repair
Replace the engine-ECU.
Check trouble symptom.
NG
Check the harness wire between the air flow sensor and the
earth, and repair if necessary.
NG
Check the harness wire between the air flow sensor and the Repair
engine-ECU (sensor signal line).
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-16 DIESEL FUEL – Troubleshooting

Code No. 19 Engine coolant temperature sensor system Probable cause

Range of Check  Malfunction of the engine coolant temperature
 Ignition switch: ON sensor
Set Conditions  Improper connector contact, open circuit or
 Sensor output voltage is 100 mV or less for 1 second short-circuited harness wire of the engine coolant
or temperature sensor circuit
 Sensor output voltage is 4,900 mV or more for 1 second  Malfunction of the engine-ECU

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
01 Engine coolant temperature sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the engine coolant temperature sensor (Refer to Replace
P.13D-52.)
OK
NG
Measure at the engine coolant temperature sensor connector A-76. Check the following connector: A-121
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 3 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 2 and earth Check trouble symptom.
OK: Continuity
NG
OK
Check the harness wire between the engine coolant
temperature sensor and the engine-ECU.
OK NG

Repair
Replace the engine-ECU.
NG
Check the following connector: A-76 Repair
OK

Check trouble symptom.

NG

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-17
Code No. 21 Fuel temperature sensor system Probable cause
Range of Check  Malfunction of the fuel temperature sensor
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the fuel
 Sensor output voltage is 100 mV or less for 1 second temperature sensor circuit
or  Malfunction of the engine-ECU
 Sensor output voltage is 4,900 mV or more for 1 second

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
02 Fuel temperature sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the fuel temperature sensor (Refer to P.13D-53.) Replace
OK
NG
Measure at the fuel temperature sensor connector A-117. Check the following connector: A-121
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 1 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 2 and earth Check trouble symptom.
OK: Continuity
NG
OK
Check the harness wire between the fuel temperature sensor
and the engine-ECU.
OK NG

Repair
Replace the engine-ECU.
NG
Check the following connector: A-117 Repair
OK

Check trouble symptom.

NG
Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-18 DIESEL FUEL – Troubleshooting

Code No. 22 Intake air temperature sensor system Probable cause

Range of Check  Malfunction of the intake air temperature sensor
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the intake air
 Sensor output voltage is 100 mV or less for 1 second temperature sensor circuit
or  Malfunction of the engine-ECU
 Sensor output voltage is 4,850 mV or more for 1 second

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
03 Intake air temperature sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the intake air temperature sensor (Refer to P.13D-52.) Replace
OK
NG
Measure at the air flow sensor connector A-73 Check the following connectors: A-120, A-121
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 1 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 2 and earth Check trouble symptom.
OK: Continuity
NG
OK
Check the harness wire between the intake air temperature
sensor and the engine-ECU.
OK NG

Repair

Replace the engine-ECU.

NG
Check the following connector: A-73 Repair
OK

Check trouble symptom.

NG
Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-19
Code No. 23 EGR valve position sensor system Probable cause
Range of Check  Malfunction of the EGR valve position sensor
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the EGR valve
 Sensor output voltage is 250 mV or less for 1 second position sensor circuit
or  Malfunction of the engine-ECU
 Sensor output voltage is 4,700 mV or more for 1 second
Range of Check
 Ignition switch: OFF → ON
Set Conditions
 Sensor output voltage is 1,500 mV or more for 1 second

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
15 EGR valve position sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the EGR valve position sensor Replace the EGR valve.
(Refer to GROUP 17 – Emission Control System.)
OK
NG
Measure at the EGR valve connector A-110. Check the following connector: A-121
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 3 and earth (Ignition switch: ON) Repair
OK: 4.8 – 5.2 V
 Continuity between 2 and earth Check trouble symptom.
OK: Continuity
NG
OK
Check the harness wire between the EGR valve position
sensor and the engine-ECU.
OK NG

Repair
Replace the engine-ECU.
NG
Check the following connectors: A-110, A-121 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the EGR valve position Repair
sensor and the engine-ECU (sensor signal line).
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-20 DIESEL FUEL – Troubleshooting

Code No. 24 Glow relay box system Probable cause

Range of Check  Malfunction of the glow relay box
 Ignition switch: OFF→ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the glow relay box
 Trouble signal input from the glow relay box circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
09 Glow relay box (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Measure at the glow relay box connector A-111. Check the harness wire between the power supply and the
 Disconnect the connector and measure at the harness glow relay box, and repair if necessary.
side.
 Voltage between 7 and earth (Ignition switch: ON)
OK: System voltage
OK
NG
Check the following connectors: A-105, A-106, A-111, Repair
A-123, A-124
OK

Check trouble symptom.

NG
NG
Check the harness wire between the glow relay box and the Repair
glow plug.
OK
NG
Check the glow plug. (Refer to GROUP 16 – Glow system.) Replace
OK

Replace the glow relay box.

NG
Check the following connector: A-121 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the glow relay box and the Repair
engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-21
Code No. 25 Immobilizer system Probable cause
Range of Check  Malfunction of the immobilizer-ECU
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire
 Improper communication between the engine-ECU and Immobilizer-ECU  Malfunction of the engine-ECU

YES
Is a diagnosis code output from the immobilizer-ECU? Check the immobilizer system (Refer to GROUP 54 – Ignition
NO Switch and Immobilizer System.)
NG
Check the following connectors: A-122, B-19, B-36 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the immobilizer–ECU and Repair
the engine-ECU.
OK

Replace the engine-ECU.

NOTE
If the engine-ECU is replaced, the immobilizer-ECU and ignition key should be replaced together with it.
13D-22 DIESEL FUEL – Troubleshooting

Code No. 26 EGR valve system Probable cause

 Malfunction of the EGR valve
 Improper connector contact, open circuit or
short-circuited harness wire of the EGR valve
circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
08 EGR valve (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the EGR valve Replace the EGR valve.
(Refer to GROUP 17 – Emission Control System.)
OK
NG
Measure at the EGR valve connector A-110. Check the harness wire between the EGR valve and the main
 Disconnect the connector and measure at the harness relay, and repair if necessary.
side.
 Voltage between 6 and earth (Ignition switch: ON)
OK: System voltage
OK
NG
Check the following connectors: A-110, A-121 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the EGR valve and the Repair
engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-23
Code No. 27 Turbocharger waste gate solenoid system Probable cause
 Malfunction of the turbocharger waste gate
solenoid
 Improper connector contact, open circuit or
short-circuited harness wire of the turbocharger
waste gate solenoid circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
05 Turbocharger waste gate solenoid (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the turbocharger waste gate solenoid Replace
(Refer to GROUP 15 – On-vehicle service.)
OK
NG
Measure at the turbocharger waste gate solenoid connector A-108. Check the harness wire between the turbocharger waste gate
 Disconnect the connector and measure at the harness solenoid and the main relay, and repair if necessary.
side.
 Voltage between 1 and earth (Ignition switch: ON)
OK: System voltage
OK
NG
Check the following connectors: A-108, A-121 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the turbocharger waste gate Repair
solenoid and the engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-24 DIESEL FUEL – Troubleshooting

Code No. 28 Fuel pressure regulator system Probable cause

 Malfunction of the fuel pressure regulator
 Improper connector contact, open circuit or
short-circuited harness wire of the fuel pressure
regulator circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
07 Fuel pressure regulator (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the fuel pressure regulator (Refer to P.13D-54.) Replace
OK
NG
Measure at the fuel pressure regulator connector A-118. Check the harness wire between the fuel pressure regulator
 Disconnect the connector and measure at the harness and the main relay, and repair if necessary.
side.
 Voltage between 2 and earth (Ignition switch: ON)
OK: System voltage
OK
NG
Check the following connectors: A-118, A-121 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the fuel pressure regulator Repair
and the engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-25
Code No. 29 No.1 injector system Probable cause
 Malfunction of the No.1 injector
 Improper connector contact, open circuit or
short-circuited harness wire of the No.1 injector
circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
01 No.1 injector (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the No.1 injector (Refer to P.13D-53.) Replace
OK
NG
Check the following connectors: A-48, A-120 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the No.1 injector and the Repair
engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

Code No. 31 No.2 injector system Probable cause

 Malfunction of the No.2 injector
 lmproper connector contact, open circuit or
short-circuited harness wire of the No.2 injector
circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
02 No.2 injector (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the No.2 injector (Refer to P.13D-53.) Replace
OK
NG
Check the following connectors: A-49, A-120 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the No.2 injector and the Repair
engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-26 DIESEL FUEL – Troubleshooting

Code No. 32 No.3 injector system Probable cause

 Malfunction of the No.3 injector
 Improper connector contact, open circuit or
short-circuited harness wire of the No.3 injector
circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
03 No.3 injector (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the No.3 injector (Refer to P.13D-53.) Replace
OK
NG
Check the following connectors: A-54, A-120 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the No.3 injector and the Repair
engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

Code No. 33 No.4 injector system Probable cause

 Malfunction of the No.4 injector
 Improper connector contact, open circuit or
short-circuited harness wire of the No.4 injector
circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
04 No.4 injector (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the No.4 injector (Refer to P.13D-53.) Replace
OK
NG
Check the following connectors: A-60, A-120 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the No.4 injector and the Repair
engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-27
Code No. 34 Glow plug system Probable cause
 Malfunction of the glow plug
 Improper connector contact, open circuit or
short-circuited harness wire of the glow plug
circuit
 Malfunction of the engine-ECU

NG
Check the glow plug (Refer to GROUP 16 – Glow System.) Replace
OK
NG
Check the following connectors: A-105, A-106, A-111, Repair
A-123, A-124
OK

Check trouble symptom.

NG
NG
Check the harness wire between the glow relay box and the Repair
glow plug.
OK

Replace the glow relay box.

NG
Check the following connector: A-121 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the glow plug and the Repair
engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

Code No. 35 Vehicle speed sensor system Probable cause

Range of Check  Malfunction of the vehicle speed sensor
 Ignition switch: ON  Improper connector contact, open circuit or
or short-circuited harness wire of the vehicle speed
 During engine running sensor circuit
Set Conditions  Malfunction of the engine-ECU
 Sensor output voltage corresponds to a speed of 250 km/h or more for 1
second

NO
Does the speedometer operate normally. Check the vehicle speed sensor circuit.
(Refer to GROUP 54 – Combination Meter.)
YES

NG
Check the following connectors: A-71, A-113, A-122 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the vehicle speed sensor Repair
and the engine-ECU.
OK

Replace the engine-ECU.

13D-28 DIESEL FUEL – Troubleshooting

Code No. 36 Fuel pressure system Probable cause

 Malfunction of the high pressure pump
 Malfunction of the injector
 Seized fuel pressure regulator
 Fuel leaking from high pressure fuel system

YES
MUT-II Self-Diagnosis code Follow INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Is diagnosis code No.21 or 28 output?
NO

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
06 Fuel pressure sensor (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*
NG

NG
MUT-II Actuator test Check the fuel pressure regulator system (Refer to P.13D-24,
07 Fuel pressure regulator (Refer to P.13D-50.) INSPECTION PROCEDURE FOR DIAGNOSIS CODE 28.)
OK

Check the following items:

 High pressure pump
 Injector
 Fuel leaking from high pressure fuel system

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-29
Code No. 37 Throttle valve control solenoid system Probable cause
 Malfunction of the throttle valve control solenoid
 Improper connector contact, open circuit or
short-circuited harness wire of the throttle valve
control solenoid circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
06 Throttle valve control solenoid (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
NG Malfunctions*
NG
Check the throttle valve control solenoid (Refer to P.13D-54.) Replace
OK
NG
Measure at the throttle valve control solenoid connector A-107. Check the following connector: A-109
 Disconnect the connector and measure at the harness OK NG
side.
 Voltage between 1 and earth (Ignition switch: ON) Repair
OK: System voltage
OK Check trouble symptom.
NG

Check the harness wire between the throttle valve control

solenoid and the main relay, and repair if necessary.

NG
Check the following connectors: A-107, A-109, A-120 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the throttle valve control Repair
solenoid and engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-30 DIESEL FUEL – Troubleshooting

Code No. 38 Engine-ECU Probable cause

 Malfunction of the engine-ECU

NG
Check the following connectors: B-18, A-121 Repair
OK

NG
Check the harness wire between the ignition switch and the Repair
engine-ECU.
OK

Check trouble symptom.

NG

Disconnect the battery terminals and reset the engine-ECU.

Check trouble symptom.

NG

Replace the engine-ECU.

Code No. 40 Additional heater relay system Probable cause

 Malfunction of the additional heater relay 1, 2
 Improper connector contact, open circuit or
short-circuited harness wire of the additional
heater relay circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
10 Additional heater relay 1 Refer to GROUP 00 – Points to Note for Intermittent
11 Additional heater relay 2 Malfunctions*
(Refer to P.13D-50.)
NG
OK
Measure at the additional heater relay 1, 2 connectors A-09X, Check the following connectors: A-09X, A-13X, A-23, A-120
A-13X. OK NG
 Disconnect the connector and measure at the harness
side. Repair
 Voltage between 5 and earth (Ignition switch: ON)
OK: System voltage Check trouble symptom.
NG NG

Check the harness wire between the additional heater relay

and engine-ECU.
OK NG
NG
Check the following connector: A-23 Repair
Repair
OK
Replace the engine-ECU.
Check trouble symptom.
NG

Check the harness wire between the additional heater relay

and the main relay, and repair if necessary.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

 DIESEL FUEL – Troubleshooting 13D-31
Code No. 41 Fan control relay (low) system Probable cause
 Malfunction of the fan control relay
 Improper connector contact, open circuit or
short-circuited harness wire of the fan control
relay circuit
 Malfunction of the engine-ECU

OK
MUT-II Actuator test INTERMITTENT MALFUNCTIONS
13 Fan control relay (low) (Refer to P.13D-50.) Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*
NG
OK
Measure at the fan control relay (low) connector A-05X. Check the following connectors: A-05X, A-23, A-120
 Disconnect the connector and measure at the harness
side. OK NG
 Voltage between 3 and earth (Ignition switch: ON) Repair
OK: System voltage
NG Check trouble symptom.
NG

Check the harness wire between the fan control relay (low)
and the engine-ECU.
OK NG

Repair

Replace the engine-ECU.

NG
Check the following connector: A-23 Repair
OK

Check trouble symptom.

NG
Check the harness wire between the fan control relay (low)
and the main relay, and repair if necessary.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

Code No. 42 Stop lamp switch system Probable cause

Range of Check  Malfunction of the stop lamp switch
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the stop lamp
 Outputs for stop lamp switches 1 and 2 are different switch circuit
 Malfunction of the engine-ECU

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
42 Stop lamp switch (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*
NG
NO
Does the stop lamp illuminate when the brake pedal is Check the stop lamp switch system.
depressed? (Refer to GROUP 35 – On-vehicle service.)
YES
NG
Check the following connectors: B-19, B-61X, B-95, A-122 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the stop lamp switch and Repair
the engine-ECU.
OK

Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

13D-32 DIESEL FUEL – Troubleshooting

Code No. 43 Clutch pedal switch system Probable cause

Range of Check  Malfunction of the clutch pedal switch
 Vehicle speed: 100 km/h or more  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the clutch pedal
 Clutch pedal switch remains off for 1 second switch circuit
 Malfunction of the engine-ECU

OK
MUT-II Data list INTERMITTENT MALFUNCTIONS
44 Clutch pedal switch (Refer to P.13D-46.) Refer to GROUP 00 – Points to Note for Intermittent
Malfunctions*
NG
NG
Check the clutch pedal switch. Replace
(Refer to GROUP 21 – On-vehicle service.)
OK
(1) NG
Measure at the clutch pedal switch connector B-97. Check the following connectors: B-89, A-122
 Disconnect the connector and measure at the harness OK NG
side.
(1) Voltage between 4 and earth (Ignition switch: ON) Repair
OK: System voltage
(2) Continuity between 1 and earth Check trouble symptom.
OK: Continuity NG

Check the harness wire between the clutch pedal switch and
engine-ECU.
OK NG

Repair
Replace the engine-ECU.
(2) NG
Check the harness wire between the clutch pedal switch and
earth, and repair if necessary.
OK
NG
Check the following connector: B-97 Repair
OK

Check trouble symptom.

NG
Replace the engine-ECU.

*: Refer to ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

Code No. 44 Power latch system Probable cause

 Malfunction of the engine-ECU

Disconnect the battery terminals and reset the engine-ECU.

NO

Check trouble symptom.

NG

Replace the engine-ECU.

 DIESEL FUEL – Troubleshooting 13D-33
Code No. 45 Main relay system Probable cause
Range of Check  Malfunction of the main relay
 Ignition switch: ON  Improper connector contact, open circuit or
Set Conditions short-circuited harness wire of the main relay
 Power is not supplied circuit
 Malfunction of the engine-ECU
Range of Check
 Ignition switch: OFF → ON
Set Conditions
 Power latch time is short or long

NG
Check the main relay (Refer to P.13D-52.) Replace
OK
NG
Measure at the main relay connector B-26. Check the harness wire between the battery and the main
 Disconnect the connector and measure at the harness relay, and repair if necessary.
side.
 Voltage between 1, 4 and earth
OK: System voltage
OK

NG
Check the following connectors: B-26, A-121 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the main relay and the Repair
engine-ECU.
OK

Replace the engine-ECU.

13D-34 DIESEL FUEL – Troubleshooting

Code No. 46 Power supply system Probable cause

Range of Check  Malfunction of the engine-ECU
 Ignition switch: ON
Set Conditions
 Power supply voltage is 6.5 V or less, or 16.5 V or more

NG
Check the battery (Refer to GROUP 54 – Battery.) Replace
OK

Check trouble symptom.

NG
NG
Check the charging system Repair
(Refer to GROUP 16 – Charging System.)
OK

Check trouble symptom.

NG

Replace the engine-ECU.

Code No. 47 ECU alimentation Probable cause

 Malfunction of the engine-ECU

Disconnect the battery terminals and reset the engine-ECU.

Check trouble symptom.

NG

Replace the engine-ECU.

 DIESEL FUEL – Troubleshooting 13D-35
INSPECTION CHART FOR TROUBLE SYMPTOMS
Caution
Check that the engine-ECU earth circuit is normal before checking for the cause of the problem.
Trouble symptoms Inspection Reference
procedure No. page

Communication with Communication with all systems is not possible. 1 13D-36

MUT-II is impossible
Communication with engine-ECU only is not possible. 2 13D-36

Engine warning lamp The engine warning lamp does not illuminate right after the 3 13D-37
and related parts ignition switch is turned to the ON position

The engine warning lamp remains illuminating and never 4 13D-38

goes out.

Starting No initial combustion (Starting not possible) 5 13D-38

Poor startability when engine is cold (Poor starting) 6 13D-39

Poor startability when engine is cold or warm (Poor starting) 7 13D-39

Idling stability Idle speed is low when engine is cold (Improper idling 8 13D-40
(Improper idling) speed)

Idling speed is high (Improper idling speed) 9 13D-40

Idling speed is low (Improper idling speed) 10 13D-41

Idle speed is unstable (Rough idling, hunting) 11 13D-41

Idling stability Engine stops soon after starting 12 13D-42

(Engine stalls)
Engine stops during idling 13 13D-42

Driving Engine output is too low 14 13D-43

Abnormal engine knocking occurs 15 13D-43

Abnormally black smoke 16 13D-44

Abnormally white smoke 17 13D-44

Hunting occurs while driving 18 13D-45

13D-36 DIESEL FUEL – Troubleshooting

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

INSPECTION PROCEDURE 1
Communication with MUT-II is not possible Probable cause
(Communication with all systems is not possible)
The cause is probably a defect in the power supply system (including earth) for  Malfunction of the connector
the diagnosis line.  Malfunction of the harness wire

NG NG
Measure at the diagnosis connector Check the following connectors: Repair
B-35. B-75, B-81
 Voltage between 16 and earth OK
OK: System voltage
NG
OK Check trouble symptom. Check the harness wire between the
power supply and diagnosis connector,
and repair if necessary.

NG
Measure at the diagnosis connector Check the harness wire between the
B-35. diagnosis connector and earth, and re-
 Continuity between 4 and earth pair if necessary.
 Continuity between 5 and earth
OK: Continuity
OK

Replace the MUT-II.

INSPECTION PROCEDURE 2
MUT-II communication with engine-ECU is impossible. Probable cause
One of the following causes may be suspected.  Malfunction of engine-ECU power supply circuit
 No power supply to engine-ECU  Malfunction of the engine-ECU
 Defective earth circuit of engine-ECU  Open circuit between engine-ECU and diagnosis
 Defective engine-ECU connector
 Improper communication line between engine-ECU and MUT-II

NG
Check the following connectors: Repair
B-09, B-19, B-35, B-60X, A-122
OK

Check trouble symptom.

NG
NG
Check the harness wire between engine-ECU and diagnosis con- Repair
nector.
OK

Check the engine-ECU power supply and earth circuit (Refer to

P.13D-45, INSPECTION PROCEDURE 19.)

NOTE
On vehicles with the multi-center display, if a malfunction cannot be resolved after the procedure above,
check the multi-center display and replace if necessary. (Refer to GROUP 54 – Multi-center Display.)
 DIESEL FUEL – Troubleshooting 13D-37
INSPECTION PROCEDURE 3
The engine warning lamp does not illuminate right after Probable cause
the ignition switch is turned to the ON position
Because there is a burnt-out bulb, the engine-ECU causes the engine warning lamp  Burnt-out bulb
to illuminate immediately after the ignition switch is turned to ON.  Defective warning lamp circuit
If the engine warning lamp does not illuminate immediately after the ignition switch  Malfunction of the engine-ECU
is turned to ON, one of the malfunctions listed at right has probably occurred.

NG
Measure at the combination meter connector B-01. Check the following connectors: B-78, B-80
 Disconnect the connector and measure at the harness side. OK NG
 Voltage between 49 and earth (Ignition switch: ON)
OK: System voltage Repair
OK
Check trouble symptom.
NG

Check the harness wire between the engine warning lamp and
the ignition switch, and repair if necessary.

NG
Check a burnt-out bulb. Replace
OK
NG
Check the following connectors: B-01, B-02, B-19, A-122 Repair
OK

Check trouble symptom.

NG
NG
Check the harness wire between the engine warning lamp and Repair
the engine-ECU.
OK
Replace the engine-ECU.
13D-38 DIESEL FUEL – Troubleshooting

INSPECTION PROCEDURE 4
The engine warning lamp remains illuminating and never Probable cause
goes out
In cases such as the above, the cause is probably that the engine-ECU is detecting  Short-circuit between the engine warning lamp and
a problem in a sensor or actuator, or that one of the malfunctions listed at right engine-ECU
has occurred.  Malfunction of the engine-ECU

Yes
MUT-II Self-Diagnosis code Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
Are diagnosis code output? CODES.
No
NG
Measure at the combination meter connector B-02. Check the harness wire between combination meter and engine-
 Disconnect the connector and measure at the harness side. ECU connector, and repair if necessary.
 Continuity between 4 and earth
OK: No continuity
OK

Replace the engine-ECU.

INSPECTION PROCEDURE 5
No initial combustion (Starting not possible) Probable cause
The cause is probably a malfunction of the control system, high pressure pump,  Malfunction of the control system
glow system or power supply.  Malfunction of the high pressure pump
 Malfunction of the glow system
 Malfunction of the immobilizer system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Glow plug, glow plug relay (glow relay box)
 Battery
 High pressure pump
 Compression pressure
 Fuel injector
 Contamination (water, kerosene, etc.) in fuel
 DIESEL FUEL – Troubleshooting 13D-39
INSPECTION PROCEDURE 6
Poor startability when engine is cold (Poor starting) Probable cause
The cause is probably a malfunction of the control system, high pressure pump,  Malfunction of the control system
fuel system or glow system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the glow system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Glow plug, glow plug relay (glow relay box)
 Fuel injector
 Engine oil viscosity
 High pressure pump
 Fuel pressure regulator
 Contamination (water, kerosene, etc.) in fuel

INSPECTION PROCEDURE 7
Poor startability when engine is both cold and warm (Poor Probable cause
starting)
The cause is probably a malfunction of the control system, high pressure pump  Malfunction of the control system
or fuel system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Fuel injector
 Compression pressure
 High pressure pump
 Fuel pressure regulator
 Contamination (water, kerosene, etc.) in fuel
13D-40 DIESEL FUEL – Troubleshooting

INSPECTION PROCEDURE 8
Idle speed is low when engine is cold (Improper idling Probable cause
speed)
The cause is probably a malfunction of the control system, high pressure pump  Malfunction of the control system
or fuel system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Fuel injector
 High pressure pump
 Fuel pressure regulator
 Fuel filter

INSPECTION PROCEDURE 9
Idle speed is high (Improper idling speed) Probable cause
The cause is probably a malfunction of the control system, fuel injector or high  Malfunction of the control system
pressure pump.  Malfunction of the fuel injector
 Malfunction of the high pressure pump
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Maladjustment of the idle speed
 Fuel injector
 High pressure pump
 Fuel pressure regulator
 DIESEL FUEL – Troubleshooting 13D-41
INSPECTION PROCEDURE 10
Idle speed is low (Improper idling speed) Probable cause
The cause is probably a malfunction of the control system, high pressure pump  Malfunction of the control system
or fuel system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 High pressure pump
 Fuel injector
 Fuel pressure regulator

INSPECTION PROCEDURE 11
Idle speed is unstable (Rough idling, hunting) Probable cause
The cause is probably a malfunction of the control system, high pressure pump,  Malfunction of the control system
fuel system or glow system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the glow system
 Malfunction of the EGR system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Glow plug, glow plug relay (glow relay box)
 EGR system
 Fuel injector
 Compression pressure
 Valve clearance
 Air in fuel line
 High pressure pump
 Fuel pressure regulator
13D-42 DIESEL FUEL – Troubleshooting

INSPECTION PROCEDURE 12
Engine stops soon after starting Probable cause
The cause is probably a malfunction of the control system, high pressure pump  Malfunction of the control system
or fuel system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Fuel injector
 Fuel filter
 High pressure pump
 Fuel pressure regulator

INSPECTION PROCEDURE 13
Engine stops during idling Probable cause
The cause is probably a malfunction of the control system, high pressure pump  Malfunction of the control system
or power supply system.  Malfunction of the high pressure pump
 Malfunction of the EGR system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Power supply system
 EGR system
 High pressure pump
 Fuel pressure regulator
 DIESEL FUEL – Troubleshooting 13D-43
INSPECTION PROCEDURE 14
Engine output is too low Probable cause
The cause is probably a malfunction of the control system, high pressure pump,  Malfunction of the control system
fuel system or EGR system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the EGR system
 Clogged air flow sensor
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Clogged air flow sensor
 Fuel injector
 EGR system
 Turbocharger
 Compression pressure
 High pressure pump
 Fuel pressure regulator
 Contamination (water, kerosene, etc.) in fuel

INSPECTION PROCEDURE 15
Abnormal engine knocking occurs Probable cause
The cause is probably a malfunction of the control system, high pressure pump  Malfunction of the control system
or fuel system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Fuel injector
 High pressure pump
 Fuel pressure regulator
13D-44 DIESEL FUEL – Troubleshooting

INSPECTION PROCEDURE 16
Abnormally black smoke Probable cause
The cause is probably a malfunction of the control system, high pressure pump,  Malfunction of the control system
fuel system or EGR system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the EGR system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Air cleaner
 Fuel injector
 EGR system
 Turbocharger
 High pressure pump
 Fuel pressure regulator

INSPECTION PROCEDURE 17
Abnormally white smoke Probable cause
The cause is probably a malfunction of the control system, high pressure pump,  Malfunction of the control system
fuel system, EGR system or glow system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the EGR system
 Malfunction of the glow system
 Malfunction of the engine-ECU

No No
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Glow plug, glow plug relay (glow relay box)
 Fuel injector
 EGR system
 Turbocharger
 High pressure pump
 Fuel pressure regulator
 DIESEL FUEL – Troubleshooting 13D-45
INSPECTION PROCEDURE 18
Hunting occurs while driving Probable cause
The cause is probably a malfunction of the control system, high pressure pump  Malfunction of the control system
or fuel system.  Malfunction of the high pressure pump
 Malfunction of the fuel system
 Malfunction of the engine-ECU

No NG
MUT-II Self-Diagnosis code Carry out MUT-II data list Repair
Are diagnosis code output? check and actuator test.
Yes (Refer to P.13D-46, 50.)
OK
Refer to P.13D-7, INSPECTION CHART FOR DIAGNOSIS
CODES. Check the following items.
 Fuel injector
 Fuel filter
 EGR system
 High pressure pump
 Fuel pressure regulator

INSPECTION PROCEDURE 19
Check the engine-ECU power supply and earth circuit

(1) NG NG
Measure at the engine-ECU connector A-121. Check the following Repair
 Disconnect the connector and measure at the harness side. connector:
(1) Voltage between 76 and earth B-26
(When terminal 80 is shorted to earth) OK
OK: System voltage
(2) Continuity between 75, 87, 88 and earth Check trouble symptoms.
OK: Continuity
(2) NG NG

Check the harness wire between the engine-ECU and main relay
OK connector, and repair if necessary.
NG
Check the following connector: Repair
A-121 Check the harness wire between the engine-ECU and earth, and
repair if necessary.
OK

Check trouble symptom.

NG

Replace the engine-ECU.

13D-46 DIESEL FUEL – Troubleshooting

DATA LIST REFERENCE TABLE

Caution
Driving tests always need another personnel.

Item Inspection Inspection contents Normal Inspection Reference

No. item condition procedure page
No.
01 Engine Ignition switch: ON Engine coolant tem- –20C Code No. 19 13D-16
coolant perature is –20C
tempera
tempera-
ture sensor Engine coolant tem- 0C
perature is 0C
Engine coolant tem- 20C
perature is 20C
Engine coolant tem- 40C
perature is 40C
Engine coolant tem- 80C
perature is 80C
02 Fuel tem-  In cooled state Approx. the Code No. 21 13D-17
perature  Ignition switch: ON same as the
sensor outdoor tem-
perature
03 Intake air Ignition switch: ON Intake air tempera- –20C Code No. 22 13D-18
tempera- ture is –20C
ture sensor
Intake air tempera- 0C
ture is 0C
Intake air tempera- 20C
ture is 20C
Intake air tempera- 40C
ture is 40C
Intake air tempera- 80C
ture is 80C
04 Boost sen- Ignition switch: ON 950 – 1040 Code No. 16 13D-13
sor hPa
 Engine coolant tem- When engine is sud- Pressure in-
perature: 80 – 95C denly raced creases
 Lamp, electric cool-
ing fan and all ac-
cessories: OFF
05 Barometric Ignition switch: ON At altitude of 0 m 950 – 1040 Code No. 17 13D-14
pressure hPa
sensor
06 Fuel pres- Engine: After warm-up When engine is sud- Pressure in- Code No. 15 13D-12
sure sensor denly raced creases
07 Fuel pres- Engine: After warm-up When engine is sud- Pressure in- – –
sure sensor denly raced creases
(command
value)
 DIESEL FUEL – Troubleshooting 13D-47
Item Inspection Inspection contents Normal Inspection Reference
No. item condition procedure page
No.
08 Air flow  Engine coolant tem- When engine is sud- Increases – –
sensor perature: 80 – 95C denly raced
 Lamp, electric cool-
ing fan and all ac-
cessories: OFF
09 Accelerator Ignition switch: ON Release the acceler- 700 – 800 Code No. 13 13D-10
pedal posi- ator pedal mV
tion sensor
(1st chan- Depress the accel- Increases in
nel) erator pedal gradu- response to
ally the pedal de-
pression
stroke
Depress the accel- 3,270 –
erator pedal fully 4,700 mV
10 Accelerator Ignition switch: ON Release the acceler- 375 mV Code No. 14 13D-11
pedal posi- ator pedal
tion sensor
(1st chan- Depress the accel- Increases in
nel) erator pedal gradu- response to
ally the pedal de-
pression
stroke
Depress the accel- 1,635 –
erator pedal fully 2,500 mV
11 Accelerator Ignition switch: ON Release the acceler- 0% – –
pedal posi- ator pedal
tion sensor
Depress the accel- Increases in
erator pedal gradu- response to
ally the pedal de-
pression
stroke
Depress the accel- 100 %
erator pedal fully
12 Crank  Engine: Cranking Compare the engine Accord Code No. 11 13D-8
angle sen-  Tachometer: Con- speed readings on
sor nected the tachometer and
the MUT-II
14 Fuel injec-  Engine coolant tem- Engine is Idling 4 – 9 mm3 – –
tion amount perature: 80 – 95C
 Lamp, electric cool-
ing fan and all ac-
cessories: OFF
13D-48 DIESEL FUEL – Troubleshooting

Item Inspection Inspection contents Normal Inspection Reference

No. item condition procedure page
No.
15 EGR valve  Engine coolant tem- When engine is sud- Increases Code No. 23 13D-19
position perature: 80 – 95C denly raced
sensor  Lamp, electric cool-
ing fan and all ac-
cessories: OFF
16 EGR valve  Engine coolant tem- Engine is Idling 5 – 10 % Code No. 26 13D-22
perature:
erature: 80 – 95
95C
C
 Lamp, electric cool- When engine is sud- Increases
ing fan and all ac- denly raced
cessories: OFF
17 Turbochar- Ignition switch: ON When engine is sud- Increases Code No. 27 13D-23
ger waste denly raced
gate sole-
noid
18 Fuel pres- Engine: After warm-up When engine is sud- Voltage in- Code No. 28 13D-24
sure regu- denly raced creases
lator
20 Crank angle  Engine: Cranking [reading is possible at Engine – –
sensor 2,000 r/min or less] speeds dis-
(2,000 r/min  Tachometer: Connected played on the
or less) MUT-II and
tachometer
are identical
21 Vehicle When vehicle is moving Compare the speeds Accord Code No. 35 13D-27
speed sen- displayed on the
sor speedometer and
the MUT-II
41 Ignition Ignition switch: ON ON – –
switch – IG
42 Stop lamp Ignition switch: ON Brake pedal: De- ON Code No. 42 13D-31
switch pressed
Brake pedal: Re- OFF
leased
44 Clutch ped- Ignition switch: ON Clutch pedal: De- ON Code No. 43 13D-32
al switch pressed
Clutch pedal: Re- OFF
leased
45 Overheat Ignition switch: ON Several seconds ON → OFF – –
indicator pass after ignition
lamp switch is turned to ON
46 Glow indi- Ignition switch: ON From 0.5 – 16 sec- ON → OFF – –
cator lamp onds after ignition
switch is turned to
ON
47 Throttle Engine: Idle OFF Code No. 37 13D-29
valve con-
trol solenoid Engine: Idle → stopped ON
48 Glow relay Ignition switch: ON From 0.5 – 16 sec- ON → OFF Code No. 24 13D-20
box onds after ignition
switch is turned to
ON
 DIESEL FUEL – Troubleshooting 13D-49
Item Inspection Inspection contents Normal Inspection Reference
No. item condition procedure page
No.
50 A/C relay Engine: After warm-up, A/C switch: OFF OFF (Com- – –
idle pressor
clutch is not
operating)
A/C switch: ON ON (Com-
pressor clutch
is operating)
51 A/C switch Engine: After warm-up, A/C switch: OFF OFF – –
idle
A/C switch: ON ON
52 Additional  Engine coolant temperature: 75C or lower ON Code No. 40 13D-30
heater relay  Intake air temperature: 10C or lower
1  Post-heating complete
 All accessories: OFF
Engine: After warm-up OFF
53 Additional  Engine coolant temperature: 75C or lower ON Code No. 40 13D-30
heater relay  Intake air temperature: 10C or lower
2  Post-heating complete
 All accessories: OFF
Engine: After warm-up OFF
54 Fan control Engine coolant temperature: 96C or lower OFF – –
relay (high)
Engine coolant temperature: 102C or higher ON
55 Fan control Engine coolant temperature: 99C or lower OFF – –
relay (low)
Engine coolant temperature: 99 – 102C ON
13D-50 DIESEL FUEL – Troubleshooting

ACTUATOR TEST REFERENCE TABLE

Item Inspection Drive contents Inspection con- Normal Inspection Reference
No. item tents condition procedure No. page
01 Injector Cut fuel to No. 1 injector Engine: After Idling condi- Code No. 29 13D-25
warm-up,
warm u , idle tion becomes
02 Cut fuel to No. 2 injector (Cut the fuel sup- different (be- Code No. 31 13D-25
ply injec-
ly to each injec unsta-
comes unsta
03 Cut fuel to No. 3 injector tor in turn and ble) Code No. 32 13D-26
y
check cylinders
04 Cut fuel to No. 4 injector which don’t’t affect
hi h d ff t Code No. 33 13D-26
idling)
05 Turbochar- Solenoid valve turns Ignition switch: Sound of op- Code No. 27 13D-23
ger waste from OFF to ON ON eration can be
gate sole- heard when
noid solenoid valve
is driven
06 Throttle Solenoid valve turns Ignition switch: Sound of op- Code No. 37 13D-29
valve con- from OFF to ON ON eration can be
trol solenoid heard when
solenoid valve
is driven
07 Fuel pres- Solenoid valve turns Ignition switch: Sound of op- Code No. 28 13D-24
sure regula- from OFF to ON ON eration can be
tor heard when
solenoid valve
is driven
08 EGR valve Solenoid valve turns Ignition switch: Sound of op- Code No. 26 13D-22
from OFF to ON ON eration can be
heard when
solenoid valve
is driven
09 Glow relay Relay turns from OFF to  Ignition OFF → ON Code No. 24 13D-20
box ON switch: ON
 Check operat-
ing condition
on data list
10 Additional Relay turns from OFF to Ignition switch: Sound of op- Code No. 40 13D-30
heater relay ON ON eration can be
1 heard when
relay is driven
11 Additional Relay turns from OFF to Ignition switch: Sound of op- Code No. 40 13D-30
heater relay ON ON eration can be
2 heard when
relay is driven
12 Fan control Relay turns from OFF to Ignition switch: Fan motor op- – –
relay (high) ON ON erates at high
speed
13 Fan control Relay turns from OFF to Ignition switch: Fan motor op- – –
relay (low) ON ON erates at low
speed
14 Engine Causes engine warning Engine: Idle Engine warn- – –
warning lamp to illuminate ing lamp illu-
lamp minates
15 Glow indi- Causes glow indicator Engine: Idle Glow indicator – –
cator lamp lamp to illuminate lamp illumi-
nates
16 Overheat Causes overheat indi- Engine: Idle Glow overheat – –
indicator cator lamp to illuminate lamp illumi-
lamp nates
 DIESEL FUEL – On-vehicle Service 13D-51
ON-VEHICLE SERVICE
COMPONENT LOCATION
Name Symbol Name Symbol
A/C relay H Engine-ECU (with barometric pressure sensor) A
A/C switch Q Fuel pressure regulator J
Accelerator pedal position sensor P Fuel pressure sensor D
(1st and 2nd channel)
Air flow sensor G Fuel temperature sensor D
(with intake air temperature sensor)
Boost sensor M Glow relay box I
Camshaft position sensor B Injector C
Clutch pedal switch N Main relay R
Crank angle sensor K Stop lamp switch N
Diagnosis connector R Throttle valve control solenoid E
EGR valve F Turbocharger waste gate solenoid E
EGR valve position sensor F Vehicle speed sensor K
Engine coolant temperature sensor L

A B C D E F G H I

J K L M

N O P Q R
13D-52 DIESEL FUEL – On-vehicle Service

MAIN RELAY CONTINUITY CHECK

Batteryy voltage
g Terminal No.
1 2 3 4
Not supplied
Main relay
connector Supplied

Main relay

INTAKE AIR TEMPERATURE SENSOR CHECK

Air flow sensor connector
1. Disconnect the air flow sensor connector.
2. Measure the resistance between terminals 1 and 2.
Standard value:
24.0 – 27.2 kΩ (at –30C)
2.35 – 2.55 kΩ (at 20C)
0.180 – 0.186 kΩ (at 100C)
Intake air temperature sensor
(Incorporated in air flow sensor connector)

Engine coolant temperature ENGINE COOLANT TEMPERATURE SENSOR

sensor connector CHECK
1. Disconnect the engine coolant temperature sensor
connector.
2. Measure the resistance between terminals 2 and 3.
Standard value: 2.14 – 2.36 kΩ (at 25C)
0.27 – 0.29 kΩ (at 80C)
Engine coolant
temperature sensor

ACCELERATOR PEDAL POSITION SENSOR

(1st channel) CHECK
Accelerator 1. Disconnect the accelerator pedal position sensor
padel position
sensor connector connector.
2. Measure the resistance between terminals 3 and 5.
Standard value: Approx. 1200 Ω
3. Measure the resistance between terminals 4 and 5.
Accelerator
padel Normal condition:

Depress the accelerator ped- Resistance value changes in

al slowly accordance with the accelera-
tor pedal depression smoothly
Accelerator padel position
sensor connector
 DIESEL FUEL – On-vehicle Service 13D-53
ACCELERATOR PEDAL POSITION SENSOR
(2nd channel) CHECK
Accelerator 1. Disconnect the accelerator pedal position sensor
padel position connector.
sensor connector
2. Measure the resistance between terminals 2 and 6.
Standard value: Approx. 1,700 Ω
Accelerator 3. Measure the resistance between terminals 1 and 6.
padel
Normal condition:

Depress the accelerator ped- Resistance value changes in

al slowly accordance with the accelera-
tor pedal depression smoothly
Accelerator padel position
sensor connector

Injector connector
INJECTOR CHECK
1. Disconnect the injector connector.
Injector
2. Measure the resistance between terminals.
Standard value: Approx. 0.33 Ω (at 20C)

Fuel temperature FUEL TEMPERATURE SENSOR CHECK

sensor connector
1. Disconnect the fuel temperature sensor connector.
2. Measure the resistance between terminals.
Standard value: 2.05 kΩ (at 25C)

Fuel temperature sensor

13D-54 DIESEL FUEL – On-vehicle Service

Fuel pressure FUEL PRESSURE REGULATOR CHECK

regulator connector
1. Disconnect the fuel pressure regulator connector.
2. Measure the resistance between terminals.
Standard value: Approx. 5 Ω (at 20C)

Fuel pressure regulator

CRANK ANGLE SENSOR CHECK

Crank angle sensor
connector 1. Disconnect the crank angle sensor connector.
2. Measure the resistance between terminals.
Standard value: 720 – 880 Ω

Crank angle sensor

Throttle vlave control THROTTLE VALVE CONTROL SOLENOID CHECK

solenoid connector
NOTE
When disconnecting the vacuum hose, always make a mark
Throttle vlave
control solenoid so that it can be reconnected at original position.
1. Disconnect the vacuum hose from the solenoid.
2. Disconnect the solenoid connector.
3. Connect a hand vacuum pump to the nipple (B) of the
solenoid (refer to the illustration at left).
4. Check the airtightness by applying a vacuum with voltage
applied directly from the battery to the solenoid and without
applying voltage.
A Battery voltage Nipple A condition Normal condition
Applied Open Vacuum leaks
B Close Vacuum main-
tained
Not applied Open Vacuum leaks
5. Measure the resistance between the terminals.
Standard value: 43 – 49 Ω (at 25C)

THROTTLE ACTUATOR CHECK

Throttle actuator 1. Disconnect the vacuum hose from the throttle actuator
and connect a hand vacuum pump to the throttle actuator
nipple.
2. Check that the actuator rod moves smoothly when applying
vacuum gradually.
 DIESEL FUEL – Fuel High Pressure Pump and Fuel Injector 13D-55
FUEL HIGH PRESSURE PUMP AND FUEL INJECTOR
REMOVAL AND INSTALLATION
4
25 Nm

12 9

25 Nm

14 5
10
35 Nm

11
13 25 Nm

6
2
3

25 Nm
7 1

50 Nm

Fuel high pressure pump removal Fuel injector removal steps

steps A 4. Fuel return tube
 Timing belt (Refer to GROUP 11C.) 5. Fuel pressure sensor connector
1. Fuel high pressure pump connector A 6. Fuel pump pipe
A 2. Fuel supply hose connection A 9. Fuel injector pipe
A 3. Fuel return hose connection A 10. Fuen pressure sensor
A 6. Fuel pump pipe 11. Common rail
B 7. Fuel high pressure pump sprocket 12. Fuel injector connector
8. Fuel high pressure pump 13. Fuel injector holder
14. Fuel injector
13D-56 DIESEL FUEL – Fuel High Pressure Pump and Fuel Injector

REMOVAL SERVICE POINTS

B FUEL HOSE CONNECTION/FUEL PIPE/FUEL
RETURN TUBE/FUEL PRESSURE SENSOR
REMOVAL
Disconnect the fuel hose, fuel pipe, fuel return tube and the
fuel pressure sensor. Then, plug them to prevent dust from
entering the fuel line, common rail and the fuel high pressure
pump.

B FUEL HIGH PRESSURE PUMP SPROCKET

MB990767 REMOVAL

MD998719

INSTALLATION SERVICE POINT

A FUEL HIGH PRESSURE PUMP SPROCKET
INSTALLATION
Use the special tool to secure the fuel high pressure pump
sprocket in the same way as during removal, and then tighten
the bolt to the specified torque.
 13A-1

GASOLINE DIRECT
INJECTION (GDI)
CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . . 2

Outline of Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 2
13A-2 GDI – General/General Information/Troubleshooting

GENERAL
OUTLINE OF CHANGES
On 2002 MY models, the following changes have been made: Due to this, some service procedures have
been established.
D Open circuit in the battery back-up line can be detected. (Diagnosis code No. P1603 indicates this
failure. If this code is set, it will not be stored as freeze frame data).
D The earth routing for the air flow sensor, the crank angle sensor and the camshaft position sensor
has been changed (On 2002 MY models, the engine-ECU and the engine-A/T-ECU have dedicated
earth terminals).
D On automatic transmission models, the vehicle speed sensor has been discontinued. The automatic
transmission output shaft speed sensor detects vehicle speed instead of the vehicle speed sensor.
GENERAL INFORMATION
GENERAL SPECIFICATIONS
Items Specifications

Engine-ECU <M/T> Identification No. E2T72678

Engine-A/T-ECU <A/T> Identification No. E2T77577

TROUBLESHOOTING
DIAGNOSIS FUNCTION
ENGINE WARNING LAMP (CHECK ENGINE LAMP)
Engine warning lamp inspection items
The following items have been added.
Code No. Diagnosis item

P1603 Battery back-up line system

NOTE
When code No. P1603 is set once, the engine warning lamp (CHECK ENGINE lamp) will illuminate.
INSPECTION CHART FOR DIAGNOSIS CODES
Code No. Diagnosis item Reference page

P0100 Air flow sensor system 13A-3

P0105 Barometric pressure sensor system 13A-5

P0110 Intake air temperature sensor system 13A-7

P0335 Crank angle sensor system 13A-8

P0340 Camshaft position sensor system 13A-10

P1603 Battery back-up line system 13A-12

NOTE
When code No. P1603 is set once, it will be stored in the memory.
 GDI – Troubleshooting 13A-3
INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE
Code No. P0100 Air flow sensor system Probable cause
Range of Check D Malfunction of air flow sensor
D Engine speed: 500 r/min or more D Open or short circuit in air flow sensor circuit or
Set Conditions loose connector contact
D The sensor output frequency is 3.3 Hz or less for four seconds. D Malfunction of engine-ECU <M/T>
D Malfunction of engine-A/T-ECU <A/T>

OK
MUT-II Data list Transient malfunction
12 Air flow sensor (Refer to (Refer to GROUP 00 – Points to
P.13A-99*, DATA LIST REFERENCE Note for Intermittent Malfunctions.)
TABLE.)
NG
NG
Check the following connector: Repair
A-73
OK
(1) NG OK
Measure at air flow sensor Measure at engine-ECU connector Check the following connectors:
connector A-73. B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
D Disconnect the connector and connector B-85 <A/T>.
NG
D Measure the voltage at the OK
measure at the harness side. Repair
(1) Voltage between terminal 3 and engine-ECU terminal <M/T> or
earth (Ignition switch: ON) engine-A/T-ECU terminal <A/T>.
OK: 4.8 – 5.2 V D Ignition switch: ON Check the harness between the air
(2) Voltage between terminal 4 and D Voltage between terminal 61 flow sensor and the engine-ECU
earth (Ignition switch: ON) <M/T>, 65 <A/T> and earth <M/T> or engine-A/T-ECU <A/T>,
OK: System voltage OK: 4.8 – 5.2 V and repair if necessary.
(3) Resistance between terminal 5
and earth NG
OK: 2 Ω or less NG
Check the following connectors: Repair
B-86 <M/T>, B-85 <A/T>
OK

Check the harness between the air NG

flow sensor and the engine-ECU Repair
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(2) NG NG
Check the following connector: Repair
B-26
OK
Check the harness between the air
flow sensor and the engine control
relay, and repair if necessary.
(3) NG NG
Check the following connector: Repair
B-84
OK OK

Check the harness between the air NG

Repair
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

To the next page

NOTE
*: Refer to the 2001 SPACE STAR Workshop Manual (Pub. No. CMXE99E1– A).
13A-4 GDI – Troubleshooting

From the previous page

OK
NG NG
Measure at air flow sensor Check the following connectors: Repair
connector A-73. B-87 <M/T>, B-84 <A/T>
D Use test harness (MB991709) to OK
connect the connector, and
measure at the pick-up harness. NG
Check the harness between the air
D Ignition switch: ON Repair
flow sensor and the engine-ECU
D Voltage between terminal 7 and
<M/T> or engine-A/T-ECU <A/T>.
earth
OK: 7 – 8 V OK
OK Replace the air flow sensor.

NG NG
Measure at air flow sensor Check the following connectors: Repair
connector A-73. B-87 <M/T>, B-84 <A/T>
D Use test harness (MB991709) to
OK
connect the connector, and NG
measure at the pick-up harness. Check the harness between the air Repair
D Selector lever position: P flow sensor and the engine-ECU
D Voltage between terminal 7 and <M/T> or engine-A/T-ECU <A/T>.
earth
OK: Engine: Idling OK
0 – 1 V
Engine speed: 3,000 r/min Check the trouble symptoms.
6 – 9 V NG
OK Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NG
Measure the output wave form at Replace the air flow sensor.
air flow sensor connector A-73 (by
using an analyzer).
D Use test harness (MB991709) to Check the trouble symptoms.
connect the connector, and
measure at the pick-up harness. NG
D Engine: Idling NG
D Voltage between terminal 3 and Check the following connectors: Repair
earth B-26, B-84, B-86 <M/T>,
OK B-85 <A/T>
OK: Waveforms should be dis- OK
played on P.13A-118 *(In-
spection Procedure Using Check the harnesses between the
an Analyzer) and noise air flow sensor and the engine-ECU
should not be displayed in <M/T> or engine-A/T-ECU <A/T>
the waveform. and between the air flow sensor
OK and the engine control relay, and
repair if necessary.

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.

NOTE
*: Refer to the 2001 SPACE STAR Workshop Manual (Pub. No. CMXE99E1– A).
 GDI – Troubleshooting 13A-5
Code No. P0105 Barometric pressure sensor system Probable cause
Range of Check D Malfunction of barometric pressure sensor
D Two seconds have passed since the ignition switch is turned ON or the D Open or short circuit in barometric pressure
engine starting process is completed. sensor circuit or loose connector contact
D Battery voltage: 8 V or more D Malfunction of engine-ECU <M/T>
Set Conditions D Malfunction of engine-A/T-ECU <A/T>
D The sensor output voltage is 4.5 V or more for four seconds (equivalent to
114 kPa of barometric pressure)
or
D The sensor output voltage is 0.2 V or less (equivalent to 53 kPa of
barometric pressure)

OK
MUT-II Data list Transient malfunction
25 Barometric pressure sensor (Refer to GROUP 00 – Points to
(Refer to P.13A-99*, DATA LIST Note for Intermittent Malfunctions.)
REFERENCE TABLE.)
NG
Check the following connector: NG
A-73 Repair
OK
(1) NG
Measure at air flow sensor Measure at engine-ECU connector OK Check the following connector:
connector A-73. B-86 <M/T> or engine-A/T-ECU B-86
D Disconnect the connector and connector B-86 <A/T>. OK NG
measure at the harness side. D Measure the voltage at the Repair
(1) Voltage between terminal 1 and engine-ECU terminal <M/T> or
earth (Ignition switch: ON) engine-A/T-ECU terminal <A/T>. Check the harness between the air
OK: 4.8 – 5.2 V D Ignition switch: ON flow sensor and the engine-ECU
(2) Resistance between terminal 5 D Voltage between terminal 41 <M/T> or engine-A/T-ECU <A/T>,
and earth <M/T>, 87 <A/T> and earth and repair if necessary.
OK: 2 Ω or less OK: 4.8 – 5.2 V
NG
Check the following connector: NG
Repair
B-86
OK
Check the harness between the air NG
Repair
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

(2) NG NG
Check the following connector: Repair
B-84
OK

Check the harness between the air NG Repair

OK flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
To the next page engine-A/T-ECU <A/T>.

NOTE
*: Refer to the 2001 SPACE STAR Workshop Manual (Pub. No. CMXE99E1– A).
13A-6 GDI – Troubleshooting

From the previous page

OK

(1) NG NG
Measure at air flow sensor Check the following connector: Repair
connector A-73. B-86
D Connect connector terminals No.
1, No. 2 and No. 5 only by OK
using test harness (MB991709), Check the harness between the air
and measure at the pick-up flow sensor and the engine-ECU
harness. <M/T> or engine-A/T-ECU <A/T>,
D Ignition switch: ON and repair if necessary.
(1) Voltage between terminal 1 and
earth
OK: 4.8 – 5.2 V (2) NG
Replace the air flow sensor.
(2) Voltage between terminal 2 and
earth
OK: Altitude 0 m: 3.7 – 4.3 V
Altitude 1,200 m: Check the trouble symptoms.
3.2 – 3.8 V (3) NG NG
(3) Voltage between terminal 5 and
earth NG
Check the following connectors: Repair
OK: 0.5 V or less B-86 <M/T>, B-85 <A/T>
OK OK

Check the harness between the air

flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.

NG
Check the following connector: Repair
B-84
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.

NG
Measure at engine-ECU connector Check the following connectors:
B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B– 85<A/T>
connector B-85 <A/T>.
OK
D Measure the voltage at the
engine-ECU terminal <M/T> or NG
engine-A/T-ECU terminal <A/T>. Check the harness between the air Repair
D Ignition switch: ON flow sensor and the engine-ECU
D Voltage between terminal 51 <M/T> or engine-A/T-ECU <A/T>,
<M/T>, 65 <A/T> and earth and repair if necessary.
OK: Altitude 0 m: 3.7 – 4.3 V OK
Altitude 1,200 m: Check the following connectors: NG
Repair
3.2 – 3.8 V B-86 <M/T>, B-85<A/T>
OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.
 GDI – Troubleshooting 13A-7
Code No. P0110 Intake air temperature sensor system Probable cause
Range of Check D Malfunction of intake air temperature sensor
D Two seconds have passed since the ignition switch is turned ON or the D Open or short circuit in intake air temperature
engine starting process is completed. sensor or loose connector contact
Set Conditions D Malfunction of engine-ECU <M/T>
D The sensor output voltage is 4.6 V or more for four seconds (equivalent to D Malfunction of engine-A/T-ECU <A/T>
– 45_C of intake air temperature)
or
D The sensor output voltage is 0.2 V or more for four seconds (equivalent to
125_C of intake air temperature)

MUT-II Data list OK Transient malfunction

13 Intake air temperature sensor (Refer to GROUP 00 – Points to
OK: Roughly the same as am- Note for Intermittent Malfunctions.)
bient temperature.
NG
NG
Check the intake air temperature Repair
sensor itself.
(Refer to P.13A-105*.)
OK
NG
Check following connector: A-73 Repair
OK
(1) NG NG
Measure at air flow sensor Check the following connector: Repair
connector A-73. B-84
D Disconnect the connector and OK
measure at the harness side.
(1) Resistance between terminal 5 Check the harness between the air NG
and earth Repair
flow sensor and the engine-ECU
OK: 2 Ω or less <M/T> or engine-A/T-ECU <A/T>.
(2) Voltage between terminal 6 and
OK
earth
(Ignition switch: ON) NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
OK: 4.8 – 5.2 V engine-A/T-ECU <A/T>.

(2) NG OK
Measure at engine-ECU connector Check the following connectors:
B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
connector B-85 <A/T>. NG
D Measure the voltage at the OK
Repair
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.
D Disconnect connector A-73. Check the harness between the air
D Ignition switch: ON flow sensor and the engine-ECU
D Voltage between terminal 62 <M/T> or engine-A/T-ECU <A/T>,
<M/T>, 64 <A/T> and earth and repair if necessary.
OK: 4.8 – 5.2 V
NG

Check the following connectors: NG

B-86 <M/T>, B-85 <A/T> Repair

OK
OK NG
Check the harness between the air Repair
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
To the next page engine-A/T-ECU <A/T>.

NOTE
*: Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1).
13A-8 GDI – Troubleshooting

From the previous page

OK
NG NG
Measure at air flow sensor Check the following connectors: Repair
connector A-73. B-84, B-86 <M/T>, B-85 <A/T>
D Use the test harness
(MB991709) to connect only OK
terminals 5 and 6, and then Check the harness between the air
measure at the pick-up harness. flow sensor and the engine-ECU
D Ignition switch: ON <M/T> or engine-A/T-ECU <A/T>,
D Voltage between terminal 6 and and repair if necessary.
earth
OK: Ambient temperature 0_C:
3.2 – 3.8 V
Ambient temperature 20_C:
2.3 – 2.9 V
Ambient temperature 40_C:
1.5 – 2.1 V
Ambient temperature 80_C:
0.4 – 1.0 V
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

Code No. P0335 Crank angle sensor system Probable cause

Range of Check D Malfunction of the crank angle sensor.
D Engine is cranking D Open or short circuit in the crank angle sensor
Set Conditions circuit or loose connector contact.
D Sensor output voltage does not change for 4 seconds (no pulse signal D Malfunction of engine-ECU <M/T>
input). D Malfunction of engine-A/T-ECU <A/T>

OK
MUT-II Data list Intermittent malfunction
22 Crank angle sensor (Refer to GROUP 00 – Points to
OK: Refer to P.13A-99*, DATA Note for Intermittent Malfunctions.)
LIST REFERENCE TABLE.
NG
NG
Check the following connector: Repair
A-94
OK

To the next page

NOTE
*: Refer to the 2001 SPACE STAR Workshop Manual (Pub. No. CMXE99E1– A).
 GDI – Troubleshooting 13A-9
From the previous page
OK

Measure at the crank angle sensor (1) NG Check the following connector:
connector A-94.
B-84
D Disconnect the connector and
measure at the harness side. OK NG
(1) The resistance between terminal Repair
1 and earth Check the harness between the
OK: 2 Ω or less crank angle sensor and the
(2) The voltage between terminal 3 engine-ECU <M/T> or
and earth engine-A/T-ECU <A/T>, and repair if
(Ignition switch: ON) necessary.
OK: 4.8 – 5.2 V
(3) The voltage between terminal 2 (2) NG OK
and earth Measure at engine-ECU connector Check the following connectors:
(Ignition switch: ON) B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
OK: System voltage connector B-85 <A/T>. NG
OK
D Measure the voltage at the Repair
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.
Check the harness wire between
D Disconnect the connector A-94 the crank angle sensor and the
D Ignition switch: ON engine-ECU <M/T> or
D The voltage between terminal 43 engine-A/T-ECU <A/T>, and repair if
<M/T>, 45 <A/T> and earth.
necessary.
OK: 4.8 – 5.2 V
NG
NG
Check the following connectors: Repair
B-86 <M/T>, B-85 <A/T>
OK
NG
Check the harness wire between Repair
the crank angle sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(3) NG NG
Check the following connector: Repair
B-26
OK OK

Check the harness wire between

Use an analyzer to measure the the crank angle sensor and the
output waveform at the crank angle engine control relay, and repair if
sensor connector A-94. necessary.
D Use the test harness NG NG
(MB991658) to connect the Check the crank angle sensor vane Replace
connector, and measure at the
OK
pick-up harness side.
D Engine: Idling Replace the crank angle sensor.
D The voltage between terminal 3
and earth
OK: A normal waveform should
be displayed as described Check the trouble symptoms.
on P.13A-118 *(Inspection NG
Procedure Using an Ana- NG
lyzer). Its maximum value Check the following connectors: Repair
should be 4.8 V or more, B-84, B-86 <M/T>, B-85 <A/T>
and its minimum value
should be 0.6 V or less OK
with no noise in waveform.
Check the harness wires between
the crank angle sensor and the
OK engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and the
Check the trouble symptoms. crank angle sensor and the engine
control relay. Then, repair if
NG necessary.
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NOTE
*: Refer to the 2001 SPACE STAR Workshop Manual (Pub. No. CMXE99E1– A).
13A-10 GDI – Troubleshooting

Code No. P0340 Camshaft position sensor system Probable cause

Range of Check D Malfunction of the camshaft position sensor
D After the engine was started D Open or short circuit in the camshaft position
Set Conditions sensor circuit or loose connector contact.
D The sensor output voltage does not change for 4 seconds (no pulse signal D Malfunction of engine-ECU <M/T>
input). D Malfunction of engine-A/T-ECU <A/T>

NG
Check the following connector: Repair
A-81
OK
(1) NG NG
Measure at camshaft position Check the following connector: Repair
sensor connector A-81. B-26
D Disconnect the connector and OK
measure at the harness side.
(1) The voltage between terminal 3 Check the harness wire between
and earth the camshaft position sensor
(Ignition switch: ON) connector and the engine control
OK: System voltage relay, and repair if necessary.
(2) The voltage between terminal 2
and earth (2) NG
Measure at engine-ECU connector OK
(Ignition switch: ON) Check the following connectors:
OK: 4.8 – 5.2 V B-86 <M/T> or engine-A/T-ECU B-86 <M/T>, B-85 <A/T>
(3) The resistance between terminal connector B-85 <A/T>. NG
OK
1 and earth D Measure the voltage at the Repair
OK: 2 Ω or less engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>. Check the harness wire between
D Disconnect connector A-81. the camshaft position sensor
D Ignition switch: ON connector and the engine-ECU
D The voltage between terminal 50 <M/T> or engine-A/T-ECU <A/T>,
<M/T>, 56<A/T> and earth and repair if necessary.
OK: 4.8 – 5.2 V
NG
NG
Check the following connectors: Repair
B-86 <M/T>, B-85 <A/T>
OK
NG
Check the harness wire between Repair
the intermediate connector and the
(3) NG engine-ECU <M/T> or
OK engine-A/T-ECU <A/T>.
OK
NG
Check the trouble symptoms. Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

Check the following connector: B-84

OK NG
Repair
Check the harness wire between
the camshaft position sensor
connector and the engine-ECU
<M/T> or the engine-A/T-ECU
To the next page <A/T>, and repair if necessary.
 GDI – Troubleshooting 13A-11
From the previous page
OK

NG NG
Use an analyzer to measure the Check the camshaft position sensing Replace
output waveform at camshaft cylinder.
position sensor connector A-81.
D Use test harness (MB991709) to OK
connect the connector, and Replace the camshaft position
measure at the pick-up harness. sensor.
D Engine: Idling
D The voltage between terminal 2
and earth
OK: A normal waveform should Check the trouble symptoms.
be displayed as described NG
on P.13A-118* (Inspection NG
Procedure Using an Ana- Check the following connectors: Repair
lyzer), its maximum value B-84, B-86 <M/T>, B-85 <A/T>, B-26
should be 4.8 V or more, OK
and its minimum value
should be 0.6 V or less Check the harness wires between the camshaft position sensor connector and the
with no noise in waveform. engine-ECU <M/T> or engine-A/T-ECU <A/T>, and the camshaft position sensor
connector and the engine control relay. Then, repair if necessary.
OK
OK
Check the trouble symptoms. Intermittent malfunction
NG (Refer to GROUP 00 – Points to Note for Intermittent Malfunctions.)

Replace the engine-ECU <M/T> or

engine-A/T-ECU <A/T>.

NOTE
*: Refer to the 2001 SPACE STAR Workshop Manual (Pub. No. CMXE99E1– A).
13A-12 GDI – Troubleshooting

Code No. P1603 Battery back-up line system Probable cause

Range of Check D Open or short circuit in the battery back-up line
D Ignition swtich: ON or loose connector contact
Set Conditions D Malfunction of engine-ECU <M/T>
D An open circuit is detected in the battery back-up line. D Malfunction of engine-A/T-ECU <A/T>

NG
Measure at the engine-ECU connector B-86 <M/T> or Check the following connetors: B-18, B-45
engine-A/T-ECU connector B-85 <A/T>.
OK NG
D Disconnect the connector and measure at the harness Repair
side.
D The voltage between terminal 80 <M/T>, 66 <A/T> and
earth Check the harness wire between the battery and the
OK: System voltage engine-ECU <M/T> or engine-A/T-ECU <A/T>.

OK OK NG
Repair
Check the following connectors: B-86 <M/T>, B-85 <A/T>
Check the trouble symptoms.
OK NG
Repair NG

Check the harness wire between the battery and the

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
engine-ECU <M/T> or engine-A/T-ECU <A/T>.
OK NG
Repair
Check the trouble symptoms.
NG

Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

 SERVICE BULLETIN
QUALITY INFORMATION ANALYSIS
OVERSEAS SERVICE DEPT. MITSUBISHI MOTORS CORPORATION

SERVICE BULLETIN No.: MSB-00E13-001

Date: 2001-06-03 <Model> <M/Y>

Subject: AVAILABILITY OF DRIVE CYCLE PATTERNS (EC)GALANT(EA0) 01-10
FOR 2001 MODEL CARS (EC)SPACE STAR
(EC) SPACE
RUNNER/SPACE
WAGON(N80, N90)
(EC)PAJERO
Group: FUEL Draft No.: 00AL602317 SPORT
(K80W,K90W)
(EC)PAJERO/
MONTERO
(V60, V70)
INFORMATION INTERNATIONAL (EC)CARISMA
CAR
ADMINISTRATION T.MASAKI-MANAGER
(EC)PAJERO PININ
OFFICE TECHNICAL SERVICE PLANNING (H60,H70)
1. Description:
On the 2001 model cars equipped with the on-board diagnostics system, the drive cycle patterns
have been made available.
Performing the running test of the car using these drive cycle patterns makes it possible to
monitor all the diagnosis codes that are required for operation of the car in order to determine if
the applicable system is operating properly or not.
2. Applicable Manuals:
Manual Pub. No. Language Page(s)
2001 GALANT PWDE9611-B (English) 4G64-GDI:13I-8
Workshop Manual Supplement PWDS9612-B (Spanish) 4G63-MPI:13A-7
PWDF9613-B (French) 6A13-MPI:13A-97
PWDG9614-B (German)
PWDD9615-B (Dutch)
PWDW9616-B (Swedish)
2001 SPACE RUNNER/ SPACE WAGON PWDE9803-C (English) 4G64-GDI:13A-9
Workshop Manual Supplement PWDS9804-C (Spanish) 4G63-MPI:13D-12
PWDF9805-C (French)
PWDG9806-C (German)
PWDD9807-C (Dutch)
PWDW9808-C (Swedish)
2001 CARISMA PWDE9502-E (English) 4G93-GDI:13J-8
Workshop Manual Supplement PWDS9503-E (Spanish) 4G92-MPI:13A-7
PWDF9504-E (French)
PWDG9505-E (German)
PWDD9506-E (Dutch)
PWDW9507-E (Swedish)
2001 SPACE STAR CMXE99E1-A (English) 4G93-GDI:13A-9
Workshop Manual Supplement 4G13-MPI:13B-7
2001 COLT PWME9511-C (English) 4G13-MPI:13A-7
Workshop Manual Supplement PWMS9512-C (Spanish) 4G93-MPI:13A-88
PWMF9513-C (French)
PWMG9514-C (German)
PWMD9515-C (Dutch)
PWMW9516-C (Swedish)
2001 PAJERO PWJE0001(1/2) (English) 6G74-GDI:13A-12
Workshop Manual VOL1
2001 MONTERO PWJS0002(1/2) (Spanish)
Workshop Manual VOL1
2001 PAJERO/MONTERO PWJT0008R (English)
Workshop Manual CD-ROM (Spanish)
(French)
(German)
2001 PAJERO SPORT PWJE9812-B (English) 6G72-MPI:13A-8
Workshop Manual Supplement PWJS9813-B (Spanish)
PWJF9814-B (French)
PWJG9815-B (German)
2001 PAJERO PININ CKRE99E1-A (English) 4G93-GDI: 13A-9
Workshop Manual Supplement

2
3. Details:2001 GALANT Workshop Manual Supplement 4G64
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G64
GDI - Troubleshooting

DRIVE CYCLE
Performing the running test of the car using the following five drive cycle patterns makes it possible to
monitor all the diagnosis codes that are required for operation of the car in order to determine if the
applicable system is operating properly or not.
In other words, doing such a drive allows to regenerate any kind of trouble which involves illuminating the
Engine Warning Lamp (Check Engine Lamp) and to verify the repair procedure has eliminated the trouble
[the Engine Warning Lamp (Check Engine Lamp) is no longer illuminated].

Caution
Two technicians should always be in the vehicle when carrying out a test drive.

NOTE
Check that the diagnosis code is not output before traveling in the Drive cycle pattern. Erase the diagnosis
code if it has been output.

DRIVE CYCLE PATTERN LIST

PROCEDURE MONITOR ITEM DIAGNOSIS CODE
1 Catalytic converter monitor P0420
2 Heated oxygen sensor <front> monitor P0130
3 Fuel trim monitor P0170
4 Feed back monitor P0125
5 Other monitor P0136, P0201, P0202, P0203, P0204, P0300,
P0301, P0302, P0303, P0304, P0325

NOTE
The vehicle speed sensor (P0500) and the power steering fluid pressure switch (P0551) are used to
determine if the system is operating properly or not through use of the Data List function of the MUT-II.

3
2001 GALANT Workshop Manual Supplement 4G64
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G64
GDI - Troubleshooting

PROCEDURE 1
Monitor item CATALYTIC CONVERTER MONITOR (P0420)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 10 minutes or more.

5 minutes or more

100 km/h or more

5 minutes or more

100 – 120 km/h

Vehicle
speed

Stopping and
braking permitted

Time

Engine start Ignition switch ”LOCK”

(OFF) position
Y6005BY

Inspection • Atmospheric temperature :-10 °C or more

conditions • Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 km/h or more.
3. Travel for 5 minutes or more while keeping the vehicle speed is 100 km/h or more.
4. Decelerate until the vehicle speed is 100 – 120 km/h or less.
5. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 100 –
120 km/h and travel for 5 minutes or more.
• Stopping and braking during this operation are permitted.
6. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

4
2001 GALANT Workshop Manual Supplement 4G64
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G64
GDI - Troubleshooting

PROCEDURE 2
OXYGEN SENSOR <FRONT> MONITOR (P0130)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 5 minutes or more.

5 minutes or more

80 – 100 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 80 – 100 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 80 –
100 km/h and travel for 5 minutes or more.
• Stopping and braking during this operation are permitted. Keep the accelerator pedal
opening degree constant for 1 minute or more after each acceleration.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

5
2001 GALANT Workshop Manual Supplement 4G64
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G64
GDI - Troubleshooting

PROCEDURE 3
monitor item FUEL TRIM MONITOR (P0170)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 15 minutes or more.

15 minutes or more

80 – 110 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 80 – 110 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 80 –
110 km/h and travel for 15 minutes or more.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

6
2001 GALANT Workshop Manual Supplement 4G64
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G64
GDI - Troubleshooting

PROCEDURE 4
monitor item FEED BACK MONITOR (PO125)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 5 minutes or more.

5 minutes or more

100 – 120 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 – 120 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 100 –
120 km/h and travel for 5 minutes or more.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

7
2001 GALANT Workshop Manual Supplement 4G64
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G64
GDI - Troubleshooting

PROCEDURE 5
monitor item OTHER MONITOR
Diagnosis P0136, P0201, P0202, P0203, P0204, P0300, P0301, P0302, P0303, P0304, P0325
code No.
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 6 minutes or more.

5 minutes or more

60 km/h or more

Vehicle
speed 30 seconds or more
Engine: Idling
Transmission: Neutral

Time

Engine start
Ignition switch ”LOCK”
(OFF) position
Y6009BY
Inspection • Engine coolant temperature : 85 °C or more
conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 60 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at
60km/h or more and travel for 5 minutes or more.
4. Return the vehicle to the shop
5. After stopping the vehicle, continue idling for 30 seconds, and then turn the ignition switch to
”LOCK” (OFF) position.
• A/C switch : OFF
• Light and all accessories : OFF
• Transmission : Neutral

8
2001 CARISMA Workshop Manual Supplement 4G93
2001 SPACE STAR Workshop Manual Supplement 4G93
GDI - Troubleshooting

DRIVE CYCLE
Performing the running test of the car using the following five drive cycle patterns makes it possible to
monitor all the diagnosis codes that are required for operation of the car in order to determine if the
applicable system is operating properly or not.
In other words, doing such a drive allows to regenerate any kind of trouble which involves illuminating the
Engine Warning Lamp (Check Engine Lamp) and to verify the repair procedure has eliminated the trouble
[the Engine Warning Lamp (Check Engine Lamp) is no longer illuminated].

Caution
Two technicians should always be in the vehicle when carrying out a test drive.

NOTE
Check that the diagnosis code is not output before traveling in the Drive cycle pattern. Erase the diagnosis
code if it has been output.

DRIVE CYCLE PATTERN LIST

PROCEDURE MONITOR ITEM DIAGNOSIS CODE
1 Catalytic converter monitor P0420
Catalyst temperature sensor <M/T> monitor P0425
(DX only)
2 Heated oxygen sensor <front> monitor P0130
3 Fuel trim monitor P0170
4 Feed back monitor P0125
5 Other monitor P0136, P0201, P0202, P0203, P0204, P0300,
P0301, P0302, P0303, P0304, P0325

NOTE
The vehicle speed sensor (P0500) and the power steering fluid pressure switch (P0551) are used to
determine if the system is operating properly or not through use of the Data List function of the MUT-II.

9
2001 CARISMA Workshop Manual Supplement 4G93
2001 SPACE STAR Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 1
monitor item CATALYTIC CONVERTER MONITOR (P0420)
CATALYTIC TEMPERATURE SENSOR <M/T> MONITOR (P0425)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 12 minutes or more.
*: 1 minute or less

Vehicle
speed 5 minutes or more 3 minutes or more 3 minutes or more

100 km/h or more 100 – 120 km/h 100 – 120 km/h

Time

Stop: 25 – 30 seconds Stop: 25 – 30 seconds Ignition switch

Engine start
”LOCK” (OFF)
position

Y6004BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 km/h.
3. Travel for 5 minutes or more while keeping the vehicle speed is 100 km/h or more.
4. Decelerate until the vehicle speed is 0 km/h within 1 minute and stop for 25 – 30 seconds.
5. Accelerate until the vehicle speed at 100 – 120 km/h within 1 minute.
6. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at
100 - 120 km/h and travel for 3 minutes or more.
7. Repeat the above procedure 4 – 6.
8. Return the vehicle to the shop, then turn the ignition switch ”LOCK” (OFF) position.

10
2001 CARISMA Workshop Manual Supplement 4G93
2001 SPACE STAR Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 2
monitor item OXYGEN SENSOR <FRONT> MONITOR (P0130)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 7 minutes or more.

*: 1 minute or less

3 minutes or more 3 minutes or more

100 – 120 km/h 100 – 120 km/h

Vehicle
speed

Time

Stop: 25 – 30 seconds
Engine start Ignition switch
”LOCK” (OFF)
position
Y6006BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 – 120 km/h within 1 minute.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 100 –
120 km/h and travel for 3 minutes or more.
4. Decelerate until the vehicle speed is 0 km/h within 1 minute and stop for 25 – 30 seconds.
5. Repeat the above procedure 2 – 3.
6. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

11
2001 CARISMA Workshop Manual Supplement 4G93
2001 SPACE STAR Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 3
monitor item FUEL TRIM MONITOR (P0170)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 13 minutes or more.
*: 1 minute or less

Vehicle
speed

3 minutes or more 3 minutes or more 3 minutes or more 3 minutes or more

100 – 120 km/h 100 – 120 km/h 100 – 120 km/h 100 – 120 km/h

Time
Stop: 25 – 30 seconds Stop: 25 – 30 seconds Stop: 25 – 30 seconds
Engine start Ignition switch
”LOCK” (OFF)
position
Y6007BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 – 120 km/h within 1 minute.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 100 –
120 km/h and travel for 3 minutes or more.
4. Decelerate until the vehicle speed is 0 km/h within 1 minute and stop for 25 – 30 seconds.
5. Repeat the above procedure 2 - 4 two times and 2 - 3 one time.
6. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

12
2001 CARISMA Workshop Manual Supplement 4G93
2001 SPACE STAR Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 4
monitor item FEED BACK MONITOR (P0125)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 5 minutes or more.

1 minute
or less
5 minutes or more

90 – 110 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Engine start Ignition switch

”LOCK” (OFF)
position
Y6008BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 90 – 110 km/h within 1 minute.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 90 –
110 km/h and travel for 5 minutes or more.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

13
2001 CARISMA Workshop Manual Supplement 4G93
2001 SPACE STAR Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 5
OTHER MONITOR
Diagnosis P0136, P0201, P0202, P0203, P0204, P0300, P0301, P0302, P0303, P0304, P0325
code No.
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 6 minutes or more.

5 minutes or more

60 km/h or more

Vehicle
speed 30 seconds or more
Engine: Idling
Transmission: Neutral

Time

Engine start
Ignition switch ”LOCK”
(OFF) position
Y6009BY
Inspection • Engine coolant temperature : 85 °C or more
conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 60 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at
60km/h or more and travel for 5 minutes or more.
4. Return the vehicle to the shop
5. After stopping the vehicle, continue idling for 30 seconds, and then turn the ignition switch to
”LOCK” (OFF) position.
• A/C switch : OFF
• Light and all accessories : OFF
• Transmission : Neutral

14
2001 PAJERO/MONTERO WAGON Workshop Manual 6G74
GDI - Troubleshooting

DRIVE CYCLE
Performing the running test of the car using the following five drive cycle patterns makes it possible to
monitor all the diagnosis codes that are required for operation of the car in order to determine if the
applicable system is operating properly or not.
In other words, doing such a drive allows to regenerate any kind of trouble which involves illuminating the
Engine Warning Lamp (Check Engine Lamp) and to verify the repair procedure has eliminated the trouble
[the Engine Warning Lamp (Check Engine Lamp) is no longer illuminated].

Caution
Two technicians should always be in the vehicle when carrying out a test drive.

NOTE
Check that the diagnosis code is not output before traveling in the Drive cycle pattern. Erase the diagnosis
code if it has been output.

DRIVE CYCLE PATTERN LIST

PROCEDURE MONITOR ITEM DIAGNOSIS CODE
1 Catalytic converter monitor P0420
Heated oxygen sensor <front> monitor P0130
2 Fuel trim monitor P0170
3 Feed back monitor P0125
4 Other monitor P0136, P0201, P0202, P0203, P0204, P0205,
P0206, P0300, P0301, P0302, P0303, P0304,
P0305, P0306, P0325

NOTE
The vehicle speed sensor (P0500) and the power steering fluid pressure switch (P0551) are used to
determine if the system is operating properly or not through use of the Data List function of the MUT-II.

15
2001 PAJERO/MONTERO Workshop Manual 6G74
GDI - Troubleshooting

PROCEDURE 1
monitor item CATALYTIC CONVERTER MONITOR (P0420)
OXYGEN SENSOR <FRONT> MONITOR (P0130)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 10 minutes or more.

5 minutes or more

100 km/h or more 100 – 120 km/h

5 minutes or more

60 – 80 km/h
Vehicle
speed

Stopping and braking

permitted

Time

Engine start Ignition switch

”LOCK” (OFF)
position
Y6005BY

Inspection • Atmospheric temperature : -10 °C or more

conditions • Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 km/h or more.
3. Travel for 5 minutes or more while keeping the vehicle speed is 100 km/h or more.
4. Decelerate until the vehicle speed is 60 - 80 km/h or less.
5. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 60 - 80
km/h and travel for 5 minutes or more.
• Stopping and braking during this operation are permitted.
6. Return the vehicle to the shop, then turn the ignition switch ”LOCK” (OFF) position.

16
2001 PAJERO/MONTERO Workshop Manual 6G74
GDI - Troubleshooting

PROCEDURE 2
monitor item FUEL TRIM MONITOR (P0170)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 15 minutes or more.

15 minutes or more

80 – 110 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 80 – 110 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 80 –
110 km/h and travel for 15 minutes or more.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

17
2001 PAJERO/MONTERO Workshop Manual 6G74
GDI - Troubleshooting

PROCEDURE 3
monitor item FEED BACKK MONITOR (P0125)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 5 minutes or more.

5 minutes or more

100 – 120 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 – 120 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 100 –
120 km/h and travel for 5 minutes or more.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

18
2001 PAJERO/MONTERO Workshop Manual 6G74
GDI - Troubleshooting

PROCEDURE 4
monitor item OTHER MONITOR
Diagnosis P0136, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0301, P0302, P0303, P0304,
code No. P0305, P0306, P0325
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 6 minutes or more.

5 minutes or more

60 km/h or more

Vehicle
speed 30 seconds or more
Engine: Idling
Transmission: Neutral

Time

Engine start
Ignition switch ”LOCK”
(OFF) position
Y6009BY
Inspection • Engine coolant temperature : 85 °C or more
conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 60 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 60
km/h or more and travel for 5 minutes or more.
4. Return the vehicle to the shop
5. After stopping the vehicle, continue idling for 30 seconds, and then turn the ignition switch to
”LOCK” (OFF) position.
• A/C switch : OFF
• Light and all accessories: OFF
• Transmission : Neutral

19
2000 PAJERO/PININ Workshop Manual Supplement 4G93
GDI - Troubleshooting

DRIVE CYCLE
Performing the running test of the car using the following five drive cycle patterns makes it possible to
monitor all the diagnosis codes that are required for operation of the car in order to determine if the
applicable system is operating properly or not.
In other words, doing such a drive allows to regenerate any kind of trouble which involves illuminating the
Engine Warning Lamp (Check Engine Lamp) and to verify the repair procedure has eliminated the trouble
[the Engine Warning Lamp (Check Engine Lamp) is no longer illuminated].

Caution
Two technicians should always be in the vehicle when carrying out a test drive.

NOTE
Check that the diagnosis code is not output before traveling in the Drive cycle pattern. Erase the diagnosis
code if it has been output.

DRIVE CYCLE PATTERN LIST

PROCEDURE MONITOR ITEM DIAGNOSIS CODE
1 Catalytic converter monitor P0420
2 Heated oxygen sensor <front> monitor P0130
3 Fuel trim monitor P0170
4 Feed back monitor P0125
5 Other monitor P0136, P0201, P0202, P0203, P0204, P0300,
P0301, P0302, P0303, P0304, P0325

NOTE
The vehicle speed sensor (P0500) and the power steering fluid pressure switch (P0551) are used to
determine if the system is operating properly or not through use of the Data List function of the MUT-II.

20
2000 PAJERO/PININ Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 1
monitor item CATALYTIC CONVERTER MONITOR (P0420)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 10 minutes or more.

5 minutes or more

100 km/h or more 100 – 120 km/h

5 minutes or more

90 – 110 km/h
Vehicle
speed

Stopping and braking

permitted

Time

Engine start Ignition switch

”LOCK” (OFF)
position
Y6005BY

Inspection • Atmospheric temperature : -10 °C or more

conditions • Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 km/h or more.
3. Travel for 5 minutes or more while keeping the vehicle speed is 100 km/h or more.
4. Decelerate until the vehicle speed is 90 –110 km/h or less.
5. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 90 -
110 km/h and travel for 5 minutes or more.
• Stopping and braking during this operation are permitted.
6. Return the vehicle to the shop, then turn the ignition switch ”LOCK” (OFF) position.

21
2000 PAJERO/PININ Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 2
OXYGEN SENSOR <FRONT> MONITOR (P0130)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 5 minutes or more.

5 minutes or more

80 – 100 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 80 – 100 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 80 –
100 km/h and travel for 5 minutes or more.
• Stopping and braking during this operation are permitted. Keep the accelerator pedal
opening degree constant for 1 minute or more after each acceleration.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

22
2000 PAJERO/PININ Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 3
Monitor item FUEL TRIM MONITOR (P0170)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 15 minutes or more.

15 minutes or more

80 – 110 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 80 – 100 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 80 –
110 km/h and travel for 15 minutes or more.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

23
2000 PAJERO/PININ Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 4
Monitor item FEED BACK MONITOR (P0125)
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 5 minutes or more.

5 minutes or more

100 – 120 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : 85 °C or more

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 100 – 120 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 100 –
120 km/h and travel for 15 minutes or more.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

24
2000 PAJERO/PININ Workshop Manual Supplement 4G93
GDI - Troubleshooting

PROCEDURE 5
monitor item OTHER MONITOR
Diagnosis P0136, P0201, P0202, P0203, P0204, P0300, P0301, P0302, P0303, P0304, P0325
code No.
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 6 minutes or more.

5 minutes or more

60 km/h or more

Vehicle
speed 30 seconds or more
Engine: Idling
Transmission: Neutral

Time

Engine start
Ignition switch ”LOCK”
(OFF) position
Y6009BY
Inspection • Engine coolant temperature : 85 °C or more
conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 60 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 60
km/h or more and travel for 5 minutes or more.
4. Return the vehicle to the shop
5. After stopping the vehicle, continue idling for 30 seconds, and then turn the ignition switch to
”LOCK” (OFF) position.
• A/C switch : OFF
• Light and all accessories: OFF
• Transmission : Neutral

25
2001 GALANT Workshop Manual Supplement 4G63, 6A13
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G63
2001 CARISMA Workshop Manual Supplement 4G92
2001 SPACE STAR Workshop Manual Supplement 4G13
2001 COLT Workshop Manual Supplement 4G13, 4G93
2001 PAJERO SPORT Workshop Manual Supplement 6G72
GDI - Troubleshooting

DRIVE CYCLE
Performing the running test of the car using the following five drive cycle patterns makes it possible to
monitor all the diagnosis codes that are required for operation of the car in order to determine if the
applicable system is operating properly or not.
In other words, doing such a drive allows to regenerate any kind of trouble which involves illuminating the
Engine Warning Lamp (Check Engine Lamp) and to verify the repair procedure has eliminated the trouble
[the Engine Warning Lamp (Check Engine Lamp) is no longer illuminated].

Caution
Two technicians should always be in the vehicle when carrying out a test drive.

NOTE
Check that the diagnosis code is not output before traveling in the Drive cycle pattern. Erase the diagnosis
code if it has been output.

DRIVE CYCLE PATTERN LIST

PROCEDURE MONITOR ITEM DIAGNOSIS CODE (DTC)
1 2 3
1 Catalytic converter monitor P0420* , P0421* , P0431* ,
2 Heated oxygen sensor <front> monitor P0130
3 Other monitor P0136, P0201, P0202, P0203, P0204,
3
P0205* , P0300, P0301, P0302, P0303,
3 3 4
P0304, P0305* , P0306* , P0325*

NOTE
*1: 4G63
*2: 4G13, 4G92, 4G93, 6A13, 6G72
*3: 6A13, 6G72
*4: 4G13, 4G63, 4G92, 4G93, 6A13

26
2001 GALANT Workshop Manual Supplement 4G63, 6A13
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G63
2001 CARISMA Workshop Manual Supplement 4G92
2001 SPACE STAR Workshop Manual Supplement 4G13
2001 COLT Workshop Manual Supplement 4G13, 4G93
2001 PAJERO SPORT Workshop Manual Supplement 6G72
GDI - Troubleshooting

PROCEDURE 1
CATALYTIC CONVERTER MONITOR
Diagnosis P0420, P0421, P0431
code No.
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 16 minutes or more.

6 minutes or more

90 km/h or more 10 minutes or more

55 – 80 km/h

Vehicle
speed
Stopping and braking
permitted

Time

Engine start Ignition switch

”LOCK” (OFF)
position
Y6001BY

Inspection • Atmospheric temperature : -10 °C or more

conditions • Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 90 km/h or more.
3. Travel for 6 minutes or more while keeping the vehicle speed is 90 km/h or more.
4. Decelerate until the vehicle speed is 80 km/h or less.
5. While traveling at 55 – 80 km/h for 10 minutes or more, fully close the throttle at least once in 2
minutes and decelerate for 10 seconds or more.
• Do not repeat deceleration too often.
• Vehicle speed may go below 55 km/h after the deceleration.
• Stopping and braking during this operation are permitted.
(If stopped or drive at 55 km/h or less for more than 5 minutes the monitoring may be
stopped. In this case please restart monitoring from the beginning.)
6. After completing the above deceleration, bring the vehicle speed back to 55 – 80 km/h and keep
it in the range until starting the deceleration again.
• Repeat the above deceleration at least 5 times.
7. Return the vehicle to the shop, the turn the ignition switch ”LOCK” (OFF) position.

27
2001 GALANT Workshop Manual Supplement 4G63, 6A13
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G63
2001 CARISMA Workshop Manual Supplement 4G92
2001 SPACE STAR Workshop Manual Supplement 4G13
2001 COLT Workshop Manual Supplement 4G13, 4G93
2001 PAJERO SPORT Workshop Manual Supplement 6G72
GDI - Troubleshooting

PROCEDURE 2
OXYGEN SENSOR <FRONT> MONITOR
Diagnosis P0130
code No.
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 16 minutes or more.

16 minutes or more

55 – 80 km/h

Vehicle
speed
Stopping and
braking permitted

Time

Ignition switch ”LOCK”

Engine start (OFF) position
Y6002BY

Inspection • Engine coolant temperature : After engine warm up.

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 55 – 80 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 55 –80
km/h and travel for 16 minutes or more.
• Stopping and braking during this operation are permitted.
4. Return the vehicle to the shop, then turn the ignition switch “LOCK” (OFF) position.

28
2001 GALANT Workshop Manual Supplement 4G63, 6A13
2001 SPACE RUNNER/SPACE WAGON Workshop Manual Supplement 4G63
2001 CARISMA Workshop Manual Supplement 4G92
2001 SPACE STAR Workshop Manual Supplement 4G13
2001 COLT Workshop Manual Supplement 4G13, 4G93
2001 PAJERO SPORT Workshop Manual Supplement 6G72
GDI - Troubleshooting

PROCEDURE 3
OTHER MONITOR
Diagnosis P0136, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0301, P0302, P0303, P0304,
code No. P0305, P0306, P0325, P0500, P0551
Drive cycle One trip monitor [from start to ignition switch to “LOCK” (OFF) position] will be completed while
pattern traveling with the following drive cycle pattern. It will take 21 minutes or more.

16 minutes or more

55 km/h or more

Vehicle
speed 5 minutes or more
Engine: Idling
Transmission: Neutral

Time

Engine start Ignition switch ”LOCK”

(OFF) position
Y6003BY

Inspection • Engine coolant temperature : After engine warm up.

conditions • Atmospheric temperature : -10 °C or more
• Condition of A/T :Selector lever D range, overdrive switch “ON” position
Test 1. Engine : start
procedure 2. Accelerate until the vehicle speed is 55 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 55
km/h or more and travel for 16 minutes or more.
4. Return the vehicle to the shop
5. After stopping the vehicle, continue idling for 5 minutes, and then turn the ignition switch to
”LOCK” (OFF) position.

29
 SERVICE BULLETIN
QUALITY INFORMATION ANALYSIS
OVERSEAS SERVICE DEPT. MITSUBISHI MOTORS CORPORATION

SERVICE BULLETIN No.: ESB-01E54-009

Date: 2002-05-03 <Model> <M/Y>

Subject: CHANGE TO BACK-UP POWER SUPPLY (EC)SPACE STAR 01-10
CIRCUITS FOR ECUs (DG0A)
Group: CHASSIS Draft No.:
ELECTRICAL 01CH009
INFORMATION INTERNATIONAL
CAR
ADMINISTRATION T.Inoue - Manager
OFFICE SERVICE PUBLICATION

1. Description:
This Service Bulletin informs you of change to the backup-power supply circuits for the engine-
ECU and engine-A/T-ECU.

2. Applicable Manuals:
Manual Pub. No. Language Page(s)
’02 SPACESTAR CMXE99E1-B (English) 13A-12
Workshop Manual chassis SUPPLEMENT CMXS99E1-B (Spanish) 13B-33, 55, 56
CMXF99E1-B (French)
CMXG99E1-B (German)
CMXD99E1-B (Dutch)
CMXW99E1-B (Swedish)
’02 SPACESTAR EMXE99E1-B (English) 4-6, 12, 18, 30,
Workshop Manual electrical wiring EMXS99E1-B (Spanish) 44, 50, 52, 58
SUPPLEMENT EMXF99E1-B (French)
EMXG99E1-B (German)
EMXD99E1-B (Dutch)
EMXW99E1-B (Swedish)
’01 SPACESTAR CMXE99E1-A (English) 13A-90, 91
Workshop Manual chassis SUPPLEMENT CMXS99E1-A (Spanish)
CMXF99E1-A (French)
CMXG99E1-A (German)
CMXD99E1-A (Dutch)
CMXW99E1-A (Swedish)
CMXI99E1-A (Italian)
3. Effective Date (Effective Model):
From October 30, 2001
(029200 and up)
4. Details :’02 SPACE STAR Workshop Manual chassis SUPPLEMENT
13A-12 GDI - Troubleshooting

<Old>

<New>
Check the following connector A-23

2
’02 SPACE STAR Workshop Manual chassis SUPPLEMENT
MPI - Troubleshooting 13B-33

<Old>

<New>
Check the following connector: A-23

3
’02 SPACE STAR Workshop Manual chassis SUPPLEMENT
MPI - Troubleshooting 13B-55

<Old>

<New>
Check the following connector: A-23

4
’02 SPACE STAR Workshop Manual chassis SUPPLEMENT
13B-56 MPI - Troubleshooting

<Old>

Check the following connector: A-23 <New>

5
’02 SPACE STAR Workshop Manual electrical wiring SUPPLEMENT
4-6 CIRCUIT DIAGRAMS

<Old>

<New>
See the
following
page.

6
<New>

NO
CONNECTION

ENGINE
CONTROL
RELAY

7
’02 SPACE STAR Workshop Manual electrical wiring SUPPLEMENT
4-12 CIRCUIT DIAGRAMS

<Old>

<New>
See the
following
page.

8
<New>

NO
CONNECTION

ENGINE
CONTROL
RELAY

9
’02 SPACE STAR Workshop Manual electrical wiring SUPPLEMENT
4-18 CIRCUIT DIAGRAMS

<Old>

<New>
See the
following
Page.

10
<New>

NO
CONNECTION

ENGINE
CONTROL
RELAY

11
’02 SPACE STAR Workshop Manual electrical wiring SUPPLEMENT
4-30 CIRCUIT DIAGRAMS

<Old>

<New>
See the following
Page.

12
<New>

NO
CONNECTION

ENGINE
CONTROL
RELAY

13
’02 SPACE STAR Workshop Manual electrical wiring SUPPLEMENT
4-44 CIRCUIT DIAGRAMS

<Added>

1R-B

66

BATTERY
BACK-UP

14
’02 SPACE STAR Workshop Manual electrical wiring SUPPLEMENT
4-50 CIRCUIT DIAGRAMS

NO
CONNECTION

<New>

<Old>

15
’02 SPACE STAR Workshop Manual electrical wiring SUPPLEMENT
4-52 CIRCUIT DIAGRAMS

<Added>

1R-B

66

BATTERY
BACK-UP

16
’02 SPACE STAR Workshop Manual electrical wiring SUPPLEMENT
4-58 CIRCUIT DIAGRAMS

NO
CONNECTION

<New>

<Old>

17
’01 SPACE STAR Workshop Manual chassis SUPPLEMENT
13A-90 GDI - Troubleshooting

<Old>

<New>

Check the following connector :A-23

18
’01 SPACE STAR Workshop Manual chassis SUPPLEMENT
GDI – Troubleshooting 13A-91

<Old>

<New>
Check the following connector: A-

19