INDEX INDEX

GENERAL HANDBOOK

D14A3, D14A4, D15Z4, D15Z5, D16Y4 engines

and D16Y9

Special tools ..................................... 11-A-2 Fuel supply system

Component location Troubleshooting guide ................. 11-A-64 Fuel
Index ................................................. ............ 11-A-3 lines ................... .................. 11-A-65
System description Fuel pipe and connecting pipes
Vacuum connections ..................................... 11-A-6 fast ................................................. ................ 11-A-67
Electrical connections ... .............................. 11-A-10 System description .................................... 11-A-70 Fuel
Troubleshooting pressure ... ................................. 11-A-70 Fuel
Troubleshooting Guide ........... 11-A-12 Self-Diagnostic injectors ......... ...................... 11-A-71 Fuel pressure
Procedures .............. 11-A-14 ECM regulator ............. 11-A-75 Fuel
Disassembly ... ................................ 11-A-18 filter ........................................ 11-A-76 Fuel pump
Module Terminal Configuration fuel ..................................... 11-A-77 Inertia
engine control ........................................ 11-A-19
switch .... ..................................... 11-A-78 Main relay PGM-
How to interpret the flow charts .... 11-A-21
FI ... ..................................... 11-A-78 Fuel
PGM-FI system tank ..... ............................. 11-A-81
System description .................................... 11-A-22
Intake air system
Troubleshooting scheme
Troubleshooting Guide ................. 11-A-82 System
Engine control module ........................... 11-A-25
Description ................... ................. 11-A-83 Air
Oxygen sensor ........... ........................... 11-A-29
filter ......................... ............................. 11-A-84 Throttle
Manifold absolute pressure sensor .. 11-A-31 Coolant
body ............ .......................... 11-A-86
temperature sensor ..... 11-A-33 Throttle position
sensor ............ 11-A-35
Emission control system
TDC sensor ........................................... 11-A- 37 Troubleshooting guide ................. 11-A-90 System

Air temperature sensor description ................... ................. 11-A-91 Exhaust Pipe

of admission ................................................ 11-A-39 Emissions ....................... ... 11-A-91 Three-way
Air mixture regulator ................. 11-A-41 Ignition pulse catalyst ..................................... 11 -A-91 Positive Crankcase
signal ................. ... 11-A-43 Vehicle speed Ventilation System ....... 11-A-92 Vapor Emission
signal ................. 11-A-45 Solenoid control lock-up Controls ..................... 11- A-93
valve ........ . 11-A-46 Electric charge
detector ......................... 11-A-47

Idle control system

Troubleshooting Guide ................. 11-A-49 System
Description ................... ................. 11-A-50 Flow chart for
troubleshooting
Idle air control valve ........ 11-A-52 Air conditioning
signal ..................... 11-A-54 Alternator FR
signal .............................. 11-A-56 Brake switch
signal ..... ....... 11-A-57 Choke switch signal ...............
11-A-58
Pressure switch signal
power steering ........................................ 11-A-59
Shift position signal A / T ............... 11-A-61 Adjusting
the idle speed ................ ...... 11-A-63
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Special tools

Number Reference Description Quantity Grades

11-A-2
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Component location

Index
D14A3, D14A4, D15Z4 and D15Z5 engines: SOLENOID VALVE BUTTERFLY POSITION SENSOR (TP)
PURGE CONTROL
VEHICLE SPEED SENSOR (VSS) VAPOR EMISSIONS (EVAP) Troubleshooting: p. 11-A-35
(D14A3 and D14A4 Engines)
Troubleshooting: p. 11-A-45 MANIFOLD ABSOLUTE PRESSURE
SENSOR (MAP)
ELECTRIC CHARGE DETECTOR (ELD) (D15Z5 Troubleshooting: p.
Troubleshooting: p. 11-A-31
Engine) 11-A-9 4
Troubleshooting: p. 11-A-47 SENSOR
AIR TEMPERATURE
POINT SENSOR ADMISSION (IAT)
CENTRAL DEAD Troubleshooting: p. 11-A-39
(Integrated in the distributor)
Troubleshooting: p. 11-A-37

SWITCH OF
PRESSURE OF
POWER STEERING
SOLENOID VALVE (PSP) (D15Z5 Engine)
LOCK-UP CONTROL Troubleshooting: p. 11-A-59
Troubleshooting: p. 11-A-46
IDLE AIR CONTROL VALVE (IAC)
TEMPERATURE SENSOR Troubleshooting: p. 11-A-52
ENGINE COOLANT (ECT)
Troubleshooting: p. 11-A-33 CATALYST THREE-WAY CATALYST (TWC) (D14A3,
THREE WAYS (TWC) D14A4 Engines)
OXYGEN SENSOR (02S) (D14A3 and D14A4 (D15Z5 engine) Troubleshooting: p. 11-A-91
Engines) Inspection: p. 11-A-91
Troubleshooting: p. 11-A-29
OXYGEN SENSOR (02S) (D15Z5
D16Y4 and D16Y9 engines: BUTTERFLY POSITION SENSOR (TP) ENGINE)
Troubleshooting: p. 11-A-29
Troubleshooting: p. 11-A-35
POINT SENSOR MANIFOLD ABSOLUTE PRESSURE SENSOR
TOP DEAD (MAP)
(Integrated in the dealer) Troubleshooting: p. 11-A-31
TEMPERATURE SENSOR
Troubleshooting: p. 11-A-37 (IAT) IDLE AIR CONTROL VALVE (IAC)
Troubleshooting: p.
11-A-39 Troubleshooting: p. 11-A-52

SPEED SENSOR (VSS) CATALYST

Troubleshooting: p. 11-A-45) THREE WAYS (TWC)
(D16Y4 engine)
Inspection: p. 11-A-91
SOLENOID VALVE SENSOR
CONTROL LOCK-UP TEMPERATURE OF
(Model A / T) REFRIGERANT (ECT) OXYGEN SENSOR (02S) (D16Y4
Troubleshooting: p. 11-A-46 Troubleshooting: p. 11-A-33 Engine)
Troubleshooting: p. 11-A-29 (cont.)

11-A-3
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Component location

Index (cont.)
D14A3, D14A4, D15Z4 and D15Z5 engines:

BUTTERFLY CABLE
Inspection and adjustment: p. 11-
AIR FILTER (ACL) A-84 Installation: p. 11-A-85
Change: p. 11-A-84

VENTILATION VALVE BODY OF THE BUTTERFLY (TB)

RESONATOR OF THE
POSITIVE CARTER (PCV)
Inspection: p. 11-A-92 Inspection: p. 11-A-86
Disassembly: p. 11-A-88
Change: p. 11-A-89

D16Y4 and D16Y9 engines:

BODY OF THE
BUTTERFLY (TB)
Inspection: p. 11-A-86 BUTTERFLY CABLE
Disassembly: p. 11-A-88 Inspection and adjustment: p. 11-
AIR FILTER (ACL) A-84 Installation: p. 11-A-85
Change: p. 11-A-89
Change: p. 11-A-84

RESONATOR VENTILATION VALVE

OF THE POSITIVE PORTFOLIO
(PCV)
Inspection: p. 11-A-92

11-A-4
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

SUPPLY UNIT
OF THE INDICATOR
FUEL
PRESSURE REGULATOR Test: see section
OF FUEL 2. 3
Test: p. 11-A-75 PUMP
Change: p. 11-A-76 FUEL
Test: p. 11-A-77
FEED PIPE Change: p. 11-A-77
OF FUEL
TRAP OF
FILTER FULL OF
FUEL FUEL
Change: p. 11-A-76
EMISSION CONTROL FILTER

EVAPORATIVE (EVAP)
Troubleshooting: 11-A-95,
97

DEPOSIT OF
FUEL
Change: p. 11-A-81
TWO-WAY EVAPORATIVE EMISSIONS
VALVE (EVAP)
Test: p. 11-A-98

QUICK CONNECT JOINTS AND FUEL

PIPE
INJECTORS Precautions: p. 11-A-67
FUEL Disconnection: p. 11-A-67
Test: p. 11-A-72 Connection: p. 11-A-68
Change: p. 11-A-73
RETURN TUBE
OF FUEL STEAM PIPE
FUEL
SWITCH OF
INERTIA MAIN RELAY PGM-FI
(KG, KE, KS and KR models) Relay test: p. 11-A-78
Troubleshooting: p. 11-A-79
Description: p. 11-A-78
Troubleshooting: p. 11-A-79

IDLE MIX REGULATOR (Model without CONTROL MODULE

TWC) SERVICE CONNECTOR
ENGINE (ECM)
Troubleshooting: p. 11-A-41 Procedures
Troubleshooting: p. 11-A-25
self-diagnosis: p. 11-A-14

The illustration shows the LHD model; the The illustration shows the LHD model; the
RHD version is symmetrical RHD version is symmetrical

11-A-5
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Description

Vacuum connections
D14A3, D14A4, D15Z4 and D15Z5 engines:

TO THE TWO-WAY
EMISSIONS VALVE
EVAPORATIVE (EVAP)

FILTER
CONTROL OF
EMISSIONS
EVAPORATIVE
(EVAP)

REGULATOR
PRESSURE OF
FUEL

VALVE
SOLENOID OF
CONTROL OF
PURGE OF
EMISSIONS
EVAPORATIVE
(EVAP)
(D14A3 engines
and D14A4)

FRONT OF VEHICLE

11-A-6
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

D16Y4 and D16Y9 engines:

TO THE TWO-WAY EMISSIONS

VALVE
EVAPORATIVE (EVAP)

CONTROL FILTER
OF EMISSIONS
EVAPORATIVE (EVAP)

FRONT OF
VEHICLE

REGULATOR
PRESSURE OF
FUEL

(cont.)

11-A-7
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

System description

Vacuum Connections (cont.)

D14A3, D14A4, D15Z4 and D15Z5 engines:

(D14A3 and D14A4 engines)

REFRIGERANT

(With model
TWC)

(D1 engines 4A3 and D14A4)

(D15Z5 engine)

OXYGEN SENSOR (02S) EVAPORATIVE EMISSIONS VALVE DEPOSIT (EVAP)

MANIFOLD ABSOLUTE PRESSURE SENSOR (MAP) AIR FILTER
COOLANT TEMPERATURE SENSOR (ECT) INTAKE AIR RESONATOR
TEMPERATURE SENSOR (IAT) IDLE AIR CONTROL VALVE (IAC) POSITIVE CRANKCASE VENTILATION VALVE (PCV)
EVAPORATIVE EMISSIONS PURGE CONTROL SOLENOID VALVE (EVAP)
BODY OF THE BUTTERFLY (TB)
FUEL INJECTOR FUEL FILTER EVAPORATIVE EMISSIONS CONTROL FILTER (EVAP)
EVAPORATIVE EMISSIONS CONTROL PURGE DIAPHRAGM
VALVE (EVAP)
FUEL PRESSURE REGULATOR
FUEL PUMP (FP) FUEL TANK TWO-WAY EVAPORATIVE EMISSIONS VALVE (EVAP) THREE-WAY
CATALYST (TWC)

11-A-8
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

D16Y4 and D16Y9 engines:

REFRIGERANT
THE MOTOR

(Motor
D16Y4)

(D16Y4 engine)

OXYGEN SENSOR (02S) EVAPORATIVE TANK EMISSIONS VALVE (EVAP) AIR FILTER
MANIFOLD ABSOLUTE PRESSURE SENSOR (MAP) REFRIGERANT
TEMPERATURE SENSOR (ECT) INTAKE AIR TEMPERATURE SENSOR RESONATOR
(IAT) IDLE AIR CONTROL VALVE (IAC) THROTTLE BODY (TB) POSITIVE CRANKCASE VENTILATION VALVE (EVAP) EVAPORATIVE
EMISSION CONTROL FILTER (EVAP) EVAPORATIVE EMISSION
CONTROL PURGE DIAPHRAGM VALVE (EVAP)
FUEL INJECTOR FUEL FILTER
TWO-WAY EVAPORATIVE EMISSIONS VALVE (EVAP) THREE-WAY
FUEL PRESSURE REGULATOR FUEL PULSATION DAMPER FUEL CATALYST (TWC)
PUMP (FP)

FUEL TANK

11-A-9
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

System description

Electric connections
PUMP
MAIN RELAY PGM-FI FUEL

SWITCH INERTIA SWITCH

ON (KG, KE, KS and KR models)

SOLENOID OF
STARTING MOTOR FUEL INJECTORS

SENSOR 02 * 6

CONNECTOR
SERVICE

IAC VALVE

LINK CONNECTOR
DATA (DATA LINK)

EVAP PURGE CONTROL SOLENOID VALVE * 4 MAP SENSOR

AT SPEED TP SENSOR
LIGHT FROM
SYSTEM
LOAD

IMA * 2

IAT SENSOR

TO THE UNIT OF
CONTROL OF
AIR CONDITIONING

ECT SENSOR

* 1: Model A / T BATTERY (80A) *

* 2: Model without TWC BACK UP (RADIO) (7.5A) *
* 3: KG, KE, KS, KQ and KR models IG1 (40A) *
* 4: D14A3 and D14A4 engines FI E / M (15A) *
* 5: D15Z5 engine . 13 FUEL PUMP (15A)
. 15 ALTERNATOR SENSOR SP (7,5A) NO. 25
* 6: Model with TWC METER (7.5A)
. 31 SIGNAL FROM START-UP M. (7.5A) In the
fuse and relay box under the hood

11-A-10
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

SWITCH
OF THE BRAKES

LIGHT OF
BRAKE

SWITCH
PSP DISTRIBUTOR

PROPERTY- SOLENOID VALVE

CODE ZADOR LOCK-UP CONTROL
UNIT IMO
INMOVI-
VALVE B LOCK-UP CONTROL
LIZADOR SOLENOID

INTERR. MOTOR
OF VENTILA-
RELAY OF
PRESSURE DOR OF VENTILATOR
A/C RADIA- FROM THE RADIATOR
DOR

MOTOR
INTER.
OF THE
PRESSURE INT. OF THE
VENTILA-
A/C
DOR OF VENTILATOR
RADIATOR OF THE
RADIATOR

ENGINE OF
FRONT FAN
CONDENSER
SWITCH
POSITION
OF CHANGE A / T

LOCATION OF THE TERMINALS

11-A-11
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Troubleshooting

Troubleshooting guide
NOTE: Each line of the graph lists the systems that could be the cause of the symptom, lined up in the order they
should be inspected, starting with 1. Find the symptom in the left column, read to the nearest cause, and refer to
the page indicated in the top of the column. If the
inspection shows that the and system operates correctly then look in the nearest system 2,
so on.
PAGE SYSTEM PGM-FI
MODULE SENSOR SENSOR SENSOR SENSOR SENSOR SENSOR REGULATES- SIGN
CONTROL OXYGEN PRESSURE TEMPERA- POSITION POINT TEMPE- DOR PULSE
MOTOR *1 ABSOLUTE TURE RE- DEAD BUTTERFLY RATURE MIXTURE ON
OF THE FRIGERAN- HIGHER AIR FROM DO
ENGINE TEE MANIFOLD ADMISSION SLOW
*2

SYMPTOM

THE FAULT INDICATOR LIGHT

(MIL) IS ILLUMINATED

THE FAULT INDICATOR LIGHT

(MIL) BLINKS

THE ENGINE DOES NOT

TURN ON

DIFFICULTY AT
COLD START

IN COLD RALEN-
IT FAST WAS-
SPECIFIC RA-
TIONS

SLOW MOTION

ABRUPT
RALEN-
IT IRRE- HOT
GULAR SPEED OF
HIGH ENGINE

HOT
SPEED OF
MOTOR TOO-
SIADO LOW

WHILE
HEATS UP

DRAFT
FRE-
CUEN- AFTER
GET WARM
TEA

START
INCORRECT OR
OPERATION-
TO BRUSCO

YIELD- FAULTS IN THE

TEST OF
WED-
ISSUE
TO PO-
BRE
WASTE OF
POWER

If the engine does not start and the MIL does not flash, allow 8 seconds at idle to set DTC 8. If not, go to step 1.
* If codes other than those listed above are indicated, count the total blinks again. If the MIL is indeed flashing those codes, replace the ECM.

If the MIL illuminates with the engine running, connect the SCS shorting connector to the service connector. If no code is displayed (the
MIL remains constantly lit), the auxiliary system is operating. Replace the ECM with a good one and check again. If the indication
disappears, replace the original ECM.

* 1: Model with TWC

* 2: Model without TWC
* 3: D15Z5 engine
* 4: Model A / T

11-A-12
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI IDLE CONTROL FUEL SUPPLY

SENSOR VALVE DETECTOR VALVE OTHERS INJECTOR OTHER AIR FROM SYSTEM OF
SPEED SOLENOID LOAD CONTROL CONTROLS OF THE COM- SUPPLY ADMISSION CONTROL
OF THE OF ELECTRIC FROM AIR OF THE BUSTIBLE IDLE OF COM- OF EMISSION-
VEHICLE CONTROL *3 OF THE IDLE BUSTIBLE NES
LOCK-UP * 4

11-A-13
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Troubleshooting

Self-diagnostic procedures
1. When the Malfunction Indicator Lamp (MIL) has illuminated, do the following:

1. Connect the SCS shorting connector to the service connector as shown (The 2P service connector
is located under the dash on the passenger side). Put the contact (II).

DATA CONNECTOR
LINK (3P)

SHORT CONNECTOR SCS

07PAZ-0010100
CONNECTOR
SERVICE (2P) The illustration shows the LHD model. The RHD
version is symmetrical
BRN BLK

2. Write down the diagnostic code (DTC): The MIL indicates a code by duration and total number of
flashes. The MIL can indicate multiple problems by flashing separate codes, one after the other. Codes
1 through 9 are indicated by short individual flashes. Codes 10 through 20 are indicated by a series of
long and short flashes. The number of long flashes equals the first digit, and the number of short
flashes equals the second digit. In some cases the first blink is difficult to observe; always count blinks
at least twice to verify code.

PILOT
INDICATOR OF
FAILURE (MIL)

Individual problems:
short

See DTC 1
See DTC 3
See DTC 13
Length Short
Multiple problems:
See DTC 1 and 3
See DTC 3 and 6
See DTC 3 and 15

11-A-14
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

II. Procedure for reprogramming the engine control module (ECM).

1. Remove the contact.

2. Remove the BACK-UP (RADIO) fuse (7.5A) from the under-hood fuse and relay box for 1- seconds
to troubleshoot the ECM.

BACK-UP FUSE
(RADIO) (7.5A)

FUSE AND RELAY BOX

UNDER THE HOOD

III. Final procedure (this procedure must be carried out after each troubleshooting).

1. Remove the SCS shorting connector.

NOTE: If the SCS shorting connector is connected and there is no other DTC memorized in the ECM, the MIL
will remain illuminated when contact (II) is turned on.

2. Reprogram the ECM.

IV. By exchanging the ECM for a good one and rechecking (KG, KE, KS, KQ and KR models). The ECM has an
immobilizer system. The ECM in good condition has a different code, this must be reset with the Honda
PGM tester, otherwise the engine will not start.

(cont.)

11-A-15
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Troubleshooting

Self-Diagnostic Procedures (cont.)

CODE OF
DIAGNOSIS INDICATED SYSTEM Page
(DTC)

ENGINE CONTROL MODULE (ECM) OXYGEN

SENSOR (02S) * 1

MANIFOLD ABSOLUTE PRESSURE SENSOR

ENGINE COOLANT TEMPERATURE SENSOR (ECT) THROTTLE POSITION SENSOR (TP)

UPPER DEAD POINT POSITION SENSOR (TDC) INTAKE AIR TEMPERATURE

SENSOR (IAT) IDLE MIXING REGULATOR (IMA) * 2 IDLE AIR CONTROL
VALVE (IAC) IGNITION PULSE SIGNAL

VEHICLE SPEED SENSOR (VSS) VALVE A / B CONTROL SOLENOID

LOCK-UP * 4 ELECTRIC CHARGE DETECTOR (ELD) * 3

* 1: Model with TWC

* 2: Model without TWC
* 3: D15Z5 engine
* 4: Model A / T

• If codes other than those listed above are indicated, check the code. If the indicated code is not
indicated in the diagram above, replace the ECM (see page 11-A-18).

• The MIL may come on indicating a problem in the system when, in fact, the electrical connections are
poor or intermittent. Check the electrical connections first, clean or repair them, if necessary.

• The MIL does not illuminate when there is a fault in the electrical load detector (ELD) circuits. However, the
MIL will display the codes when there is a short in the service connector.

11-A-16
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

ECM disassembly

If a particular code inspection requires checks for voltage or resistance of the ECM connectors, remove
the lower passenger side panel. Remove the carpet to expose the ECM. Unscrew the screw from the
ECM.

NDE

LOWER PANEL

The illustration shows the LHD model; the

RHD version is symmetrical.

(cont.)

11-A-17
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Troubleshooting

Self-Diagnostic Procedures (cont.)

When checking the ECM connector terminals, carefully pass the tester probe from the cable side to the
connector until it contacts the terminal end of the cable.

NDE

PROBE
FITTING ROOM

DIGITAL COMMERCIAL CIRCUIT TESTER

WATCH OUT:
• Performing wire insulation can cause poor or intermittent connections. To test connectors other
• than test wiring, contact the probe of the tester with the terminal on the connector side of the
engine compartment wiring connectors. For female connectors, lightly touch the probe of the
tester, without inserting it.

RUBBER STAMP TESTER PROBE

CABLING

TERMINAL

11-A-18
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Motor Control Module Terminal Configuration

ECM CONNECTOR A (26P)

TERMINAL SIDE OF MALE

TERMINALS
ECM CONNECTOR A (26P)
N OTA: Standard battery voltage; 12V
Number Color of
Cable name Description Sign
terminal cable
INJ1 4 (FUEL INJECTOR 1 AND 4) INJ2 3 Activates injectors numbers 1 and 4 With the engine running: pulses
(FUEL INJECTOR 2 and 3) Activates injectors numbers 2 and 3
FLR (FUEL PUMP RELAY) Activates the fuel pump relay 0 V for two seconds after turning on the ignition
(II). Next, battery voltage
PCS (EVAP PURGE CONTROL SOLENOID VALVE) Activates EVAP purge control solenoid valve With the engine running, engine coolant below 75 ° C

With the engine running, engine coolant above 75 ° C

IACV N (NEGATIVE SIDE OF IDLE AIR CONTROL Activate the IACV (negative side) With the engine running: pulses
VALVE)
IACV P (POSITIVE SIDE OF IDLE AIR CONTROL Activate the IACV (positive side) With the engine running: pulses
VALVE)
LC B (VALVE B CONTROL LOCK-UP SOLENOID) Activates valve B lock-up control solenoid With lock-up activated: battery voltage With
lock-up deactivated: 0V
LC A (LOCK-UP CONTROL SOLENOID VALVE) Activates valve A lock-up control solenoid With lock-up activated: battery voltage With
lock-up deactivated: 0V
STS (STARTING MOTOR SWITCH SIGNAL Detects the signal from the choke With the starter switch on (III): battery voltage With the starter switch
off: 0 V
switch
PSP SW (P / S OIL PRESSURE SWITCH) Detect PSP switch signal At idle with the steering wheel fully straight: 0V At idle
with the steering wheel turned: battery voltage

IGP2 (POWER SOURCE) Power source for ECM control circuit With the ignition on (II): battery voltage With the
ignition off: 0V
IGP1 (POWER SOURCE) Power source for ECM control circuit With the ignition on (II): battery voltage With the
ignition off: 0V
PG2 (GROUND) Ground for ECM power circuit Ground for Less than 1 V in all cases
PG1 (GROUND) ECM power circuit Detects brake switch signal
BK SW (BRAKE SWITCH) With brake pedal removed: 0V
With the brake pedal depressed: battery voltage
FAN C (RADIATOR FAN CONTROL) Activates the radiator fan relay With the radiator fan running: 0V With the
radiator fan stopped: voltage
ALT C (ALTERNATOR CONTROL) Sends the alternator control signal With a warm engine running: battery voltage Driving
with a minimum electrical load: 0V

MIL (FAULT INDICATOR PILOT) Activate the MIL With MIL on: 0V
With MIL off: battery voltage
ACC (A / C CLUTCH RELAY) Activates the A / C clutch relay With compressor activated: 0V
With compressor off: battery voltage
IG PLS (IGNITION PULSE) Sends the ignition pulse With the ignition on (II): battery voltage With the
engine running: about 4V (depending on engine
speed)
ATPNP (A / T SHIFT POSITION SWITCH) Detect A / T shift position switch In positions N or P: 0V
signal In different positions: battery voltage
ACS (A / C SWITCH SIGNAL) Detects A / C switch signal With A / C on: 0V
With A / C off: battery voltage
TXD / RXD (DLC) Sends and receives signal from Honda With the ignition on (II): about 5V
PGM tester
LG2 (LOGIC GROUND) Ground for the ECM control circuit Ground Less than 1 V in all cases
LG1 (LOGIC GROUND) for the ECM control circuit

(cont.)

11-A-19
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Troubleshooting

Terminal Configuration engine control module (cont.)

ECM CONNECTOR D (22P)

TERMINAL SIDE OF FEMALE TERMINALS

ECM CONNECTOR D (22P)

NOTE: Standard battery voltage; 12V
Number Color of Terminal name Description Sign
terminal cable
VBU (VOLTAGE) Power source for ECM control circuit Power Battery voltage in all cases
source for DTC memory

VSS (VEHICLE SPEED SENSOR) Detect VSS signal With the ignition on (II) and the front wheels turning:
0V - 5V cycles

IMO CODE (IMMOBILIZER CODE) TDC (TDC Detects immobilizer signal Detects
SENSOR SIGNAL) TDC sensor signal With the engine running: pulses
ATP D3 (A / T SHIFT POSITION SWITCH) Detect A / T shift position switch In position D3: 0V
signal In any other position: battery voltage
TPS (THROTTLE POSITION SENSOR) Detect TP sensor signal With the throttle fully open: about 4.8 V With the throttle fully
closed: about 0.05V

MAP (MANIFOLD ABSOLUTE PRESSURE Detect MAP sensor signal With the ignition on (II): about 3V
SENSOR) At idle: about 1V (depending on engine speed)

IAT (INTAKE AIR TEMPERATURE SENSOR) Detect IAT sensor signal With the ignition on: about 0.1V - 4.8V (depending on
the intake air temperature)
ECT (REFRIGERANT TEMPERATURE Detect ECT sensor signal With the ignition on: about 0.1V - 4.8V (depending on
SENSOR) the coolant temperature)

SG1 (SENSOR GROUND) VCC1 Ground for MAP sensor Less than 1 V in all cases
(SENSOR VOLTAGE) Power source for MAP sensor With the ignition on (II): about 5V With the
ignition off: 0V

SCS (SERVICE SIGNAL) Detects the service connector signal (the With connector connected: 0V With
signal that causes the DTC indication) connector disconnected: 5V

IG R (IGNITION PULSE RETURN SIGNAL) Detects the ignition pulse return signal With the engine running: about 10 V (depending on
the engine speed)

ATP D4 (A / T SHIFT POSITION SWITCH) Detect A / T shift position switch In position D4: 0V
signal In any other position: battery voltage
EL (ELD) Detect ELD signal With brake lights idling: about 2.5 - 3.5 V

With low beams idling: about 1.5 - 2.5 V

IMA (IDLE MIXING REGULATOR) Detects the IMA signal With the ignition on (II): about 0.5 - 4.5 V (depending on
the idle mixture)
ALT F (ALTERNATOR SIGNAL FR) Detects the FR signal from the alternator With warm engine running: 0V battery voltage
(depending on electrical load)

02S (OXYGEN SENSOR) Detects the signal from the oxygen sensor With the throttle fully open from idle and the engine warm:
more than 0.6V
With the butterfly closed quickly: less than 0.4V

SG2 (SENSOR GROUND) VCC2 Sensor mass Less than 1 V in all cases
(SENSOR VOLTAGE) Supplies voltage to the sensor With the ignition on (II): about 5 V With the
ignition off: 0V

* 1: D14A3 and D14A4 Model

* 2: A / T Engines
* 3: D15A5 engine
* 4: KG models. KE, KS, KR and KQ
* 5: Model without TWC
* 6: Model with TWC

11-A-20
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

How to interpret the schematics

The scheme is designed to be used from the main to the end of the repair. It is like an indicator map of the
shortest distance. Keep in mind, however, that if you “exit” the map anywhere except at a “stop” symbol, you
could easily become disoriented.

BEGINNING Describe the conditions or situation to begin with the troubleshooting scheme.
(bold)

ACTION It prompts you to perform a certain operation: carry out a test, set a condition, and so on.

DECISION The question about the result of an action. Then it sends you in the proper direction to troubleshoot.

END
The end of a series of actions or decisions - Describes a final repair operation and, in some cases,
(bold) takes you to an earlier step in the schematic to verify the repair.

NOTE:
• The term 'Intermittent Failure' appears throughout these diagrams. It refers to a system that could have
failed, but is currently operating correctly. If the Malfunction Indicator (MIL) on the dash does not illuminate,
check for loose wires or poor connections on all connectors related to the circuit you are troubleshooting
(see illustration below).

• Most troubleshooting charts ask you to reprogram the engine control module (ECM) and try to duplicate
the diagnostic code (DTC). If the problem is intermittent and the code cannot be simulated, then skip the
schematic as this will only cause confusion and possibly an unnecessary change to the ECM.

• "Open" or "short" are common electrical terms. An open is a break in a wire or connection. A short is an
accidental connection of a wire to ground, or to another wire. In simple electronics, this means that
something will not work at all. In full electronics (such as ECMs), this may mean that the system is working,
but not the way it is supposed to.

• If the electrical readings are not as specified when using the test wiring, check the electrical
connections before proceeding with troubleshooting.

TENSE

LOOSE

11-A-21
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

System description

TICKETS ENGINE CONTROL MODULE (ECM) DEPARTURES

TDC sensor
MAP sensor
ECT sensor
Fuel injectors
IAT sensor Main relay PGM-FI (fuel pump)
TP sensor Regulation and timing of the fuel
injector
02S * 1 THOUSAND

VSS IAC valve

Electronic idle control
A / C compressor relay
ELD * 3
Radiator fan relay * 3 Condenser fan
Ignition pulse signal Starter Other control functions relay ALT * 3
signal FR ALT signal
EVAP purge control solenoid valve
Ignition advance control
*5
Air conditioning signal A / T shift
Lock-up control solenoid valve * 4
position signal * 4 Auxiliary functions of the
ECM

Battery voltage (IGN 1) Brake

switch signal PSP switch signal *
3 IMA * 2

Service connector signal

* 1: Model with TWC

* 2: Model without TWC
* 3: D15Z5 engine
* 4: Model A / T
* 5: D14A3 and D14A4
engines

PGM-FI system

The PGM-FI system of this model is a multi-input sequential injection system.

Fuel Injector Duration and Timing

The ECM displays memories of basic discharge durations at various engine speeds and manifold pressures. The
basic discharge duration, after reading from the memory, is modified by the signals received from the sensors, in
order to obtain a final discharge duration.

Idle air control

Idle air control valve (IAC valve).

When the engine is cold, the A / C compressor is on, the transmission is in gear (A / T only), the brake pedal is
depressed, the P / S load is high, or the alternator is charging, the ECM controls the current from the IAC valve to
maintain proper idle speed.

Ignition advance control

The ECM contains memories of basic ignition advancements at various engine speeds and manifold pressures.
The ignition advance is also adjusted according to the coolant temperature.

Other control functions

1. Start control.
When the engine is started, the ECM provides a rich mixture increasing the life of the fuel injector.

2. Fuel pump control

• When the ignition is made, the ECM supplies ground to the main relay PGM-FI, which in turn supplies
current to the fuel pump for two seconds to pressurize the fuel system.

• When the engine is running, the ECM supplies ground to the main relay PGM-FI which, in turn,
supplies power to the fuel pump.
• When the engine is not running and the ignition is on, the ECM cuts ground to the main relay PGM-FI
which, in turn, cuts power to the fuel pump.

11-A-22
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

3. Fuel cut control

• During deceleration with the throttle valve closed, power to the injectors is cut off to save fuel at
speeds above 900 rpm. (min-1) (D15Z5 engine); 990 rpm (min-1) (except D15Z5 engine)

• The fuel cut-off action occurs when the engine speed exceeds 7,000 rpm (min-1), regardless of the
throttle valve position, to prevent the engine from over-revving.

Four. A / C Compressor Clutch Relay

When the ECM receives the cooling command from the air conditioning system, it delays the activation of
the compressor and enriches the mixture to provide a smooth transition to A / C mode.

5. Vapor Emission Purge Control Solenoid Valve (EVAP) * 5.

When the engine coolant temperature is below 75 ° C, the ECM supplies mass to the EVAP purge control
solenoid valve, which cuts the vacuum to the EVAP purge control filter.

6. Alternator control * 3

The system controls the voltage generated in the alternator according to the electrical load in driving
mode, which reduces the load on the engine to optimize fuel economy.

Auxiliary functions of the ECM

1. Safety function

When an abnormality appears in a signal from a sensor, the ECM ignores this signal and assumes a
preset value for this sensor, allowing the engine to continue activated.

2. Auxiliary function

When an abnormality appears in the ECM, the fuel injectors are controlled by an auxiliary circuit
independent of the system, to allow basic driving functions.

3. Self-diagnosis function (MIL indicator light)

When an abnormality appears in the signal from a sensor, the ECM supplies ground to the MIL and stores
the code in the cancellable memory.When the ignition is made for the first time, the ECM supplies ground
to the MIL for two seconds to check the status of the engine. the MIL bulb.

Four. Two-phase detector method

To avoid erroneous indications, the two-step detection method is used for the H02S, the fuel gauges and
the EGR diagnostic functions. When a problem occurs, the ECM stores it in its memory. When the same
problem appears again when turning the ignition on and off again, the ECM informs the driver by
illuminating the MIL. However, to facilitate troubleshooting, this function is canceled when the service
connector is cut. The MIL will blink immediately when a problem appears.

(cont.)

11-A-23
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

System Description (cont.)

A system has been adopted featuring a TDC sensor, which monitors the top dead spots of all cylinders. The TDC
sensor signals are used only to control the timing of fuel injection and ignition advance.

A light-emitting diode sends light through the slots of a plate built into the distributor. Due to the rotation of the
rotor plate, the emitted light is continuously interrupted and passed through by a light receiving diode. The
receiver diode converts these variations into on and off pulses of
voltage, which are sent to the ECM.

SENSOR
TDC TDC SENSOR

ROTOR PLATE

DIODE
TRANSMITTER GROOVE
OF LIGHT DIODE
RECEPTION

R FOR LIGHT

GROOVE

PLATE OF
ROTOR

After each TDC signal, the fuel is injected once (mass injection method). When starting the engine, the required
amount of fuel is simultaneously injected into each cylinder at each TDC signal to improve starting
characteristics. For better performance
during acceleration, the required amount of fuel a time when is additionally injected into the cylinders in
they would not normally receive fuel.

TDC SIGNAL

Injection Injection Injection Injection

CYLINDER CIRCUIT NO. 1 Combustion Escape Compression admission Combustion Escape Compression admission

CYLINDER CIRCUIT NO. 3 Compression Combustion Escape Admission Compression Combustion Escape Admission

CYLINDER CIRCUIT NO. 4 Admission Compression Combustion Escape Admission Compression Combustion Exhaust

CYLINDER CIRCUIT Nº. 2 Escape Admission Compression Combustion Escape Admission Compression Combustion

(The example shows the injection model in condition normal ions)

11-A-24
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Engine Control Module (ECM)

NOTE: If this symptom is intermittent, check if the fu sible no. 25 METER
Malfunction indicator light (MIL) (7.5A), in the under-dash fuse and relay box, is loose, or if the ECM terminal A19 connection is
does not come on (even within poor, or there is an intermittent open in the GRN / ORN wire, between the ECM (A19) and the
two seconds) after ignition is set of indicators.
turned on

Check the fuse:

Put the contact (II)

- Repair short in wire between fuse

DO NOT
no. 25 METER (7.5A) and the set of
Does the oil pressure light come on? indicators
- Change the fuse no. 25
YES METER (7.5A)
ECM CONNECTOR A (26P)

Check engine start:

Try to start the motor
Check for open in the cables
(lines PG1 and PG2):
1. Remove the contact.
DO NOT 2. Put the contact (II). Measure
Does the engine start? 3. the voltage between ground
and terminals A14 and A15 of
YES the ECM connector.

DO NOT Repair open wires between ECM

Is it less than 1V? (A14, A15) and G101 that were over
1V
YES

Replace the ECM with a good one and ECM CONNECTOR A (26P)
recheck (see page 11-A-15). If the
symptom and indication disappear,
Check the MIL: replace the original ECM
1. Remove the contact.
2. Connect terminal A19 of the
ECM connector to ground. Put
3. the contact (II)

- Change the MIL bulb.

Does the MIL come on?
DO NOT
- Repair open in wire between
ECM (A19) and gauge cluster

YES

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

(cont.)

11-A-25
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Mot control module or (ECM) (cont.)

Malfunction indicator light (MIL) stays

on or illuminates after 2 seconds

(KG, KE, KS and KR models)

Check the inertia switch:

Press the inertia switch

Does the MIL stay on?

DO NOT Intermittent fault; the system is
fine for the moment

YES COOL SWITCH CONNECTOR

Check the switch and inertia:
1. Disconnect the 3P connector
from the inertial switch.
2. Connect terminals 1 and 3 of the SWITCH
3P connector of the INERTIA
inertial switch using
a bridge

BRIDGE
Replace the inertia switch
DO NOT
Does the MIL stay on?
TERMINAL SIDE OF MALE TERMINALS

YES NOTE:
• When there is no memorized code, the MIL will stay on if there is a short in the service connector
and the ignition is on (II).
• If this symptom is intermittent, check:
- Fuse FI E / M (15A), in relay and fuse box under hood, loose.
- Fuse no. 13 FUEL PUMP (15A), in fuse and relay box under dash, loose.

- Intermittent short in BRN wire between ECM (D13) and service connector. Intermittent open
Check the diagnostic code
- in BLK wire between service connector and G402. Intermittent short between GRN / ORN
(DTC):
1. Connect the SCS short - wire between ECM (A19) and gauge cluster.
connector to the service
connector (see - Intermittent short in YEL / RED wire between ECM (D11) and MAP sensor. Intermittent short
page 11-A-14). - in YEL / BLU wire between ECM (D22) and TP sensor, IMA (non-TWC model).
2. Put the contact.

YES See self-diagnosis procedures (p. 11-

Does the MIL indicate any DTCs? A-12)

DO NOT ECM D CONNECTOR (22P)

Check engine start:

1. Disconnect the shorting connector
from the service connector.
2. Try to start the engine

TERMINALS CABLE SIDE

Check the output voltage
ECM (SCS line):
FEMALE
1. Remove the contact.
YES 2. Put the contact (II). Measure
Does the engine start?
3. the voltage between ECM
connector terminal D13 and
DO NOT
ground.
Buy Check for open on SCS
cable ( line):
1. Connect the SCS short
connector to the service
YES connector (see p. 11-A-14).
Is it approx. 5 V?
2. Measure the voltage
DO NOT between ECM connector
terminal D13 and ground.
Repair short in the wire between
the ECM (D13) and the service
connector

(On page 11-A-27) (On page 11-A-27)

11-A-26
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

(From p. 11-A-26) (From p. 11-A-28)

Check the fuse: YES

Inspect the FI E / M fuse in the under- Repair open in wire between Is it approx. 5V?
hood fuse and relay box ECM (D13) and service
connector DO NOT

* NOTE: After repairing, disconnect the

SCS shorting connector,
perform a road test and recheck if the
MIL indicates any codes

Check for short in cable (MIL

- Repair short in the wire between line):
DO NOT the FI E / M fuse (15A) and the 1. Remove the SCS shorting
Is the fuse okay? connector from the
main relay PGM-FI
- Change the FI E / M fuse (15A) service
YES 2. Remove the contact.
3. Disconnect ECM connector A
(26P) from ECM Put the
Four. ignition (II).

Repair short in the wire between YES

Does the MIL come on?
the ECM (A19) and the MIL

DO NOT

Check the fuse:

Inspect fuse no. 13 FUEL PUMP (15A), in Cam bie the ECM by one in
the fuse and relay box under the dash
good the conditions and return to
check (see page 11-A-15). If the
symptom and indication
disappear,
change original ECM
- Repair short in wire between
under-dash fuse and relay box and
DO NOT main PGM-FI relay
Is the fuse okay?
- Change the fuse no. 13 FUEL
YES PUMP (fuel pump) (15A)

Check for short on sensors:

1. Put the contact (II) Disconnect

2. the 3P connector of each
sensor by
separated.
• MAP sensor
• TP sensor
• IMA sensor (model without TWC)

DO NOT Replace the sensor causing the

Does the MIL stay on?
pilot to go out

YES

(cont.)
(On page 11-A-28)

11-A-27
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Engine Control Module (ECM) (cont.)

(From p. 11-A-27)

ECM CONNECTOR D (22P)

Check for short in cables (lines
VCC1, VCC2):
1. Remove contact
2. Disconnect ECM connector D
(22P), from ECM Check
3. continuity between ground
and terminals D11 and D22 of
ECM connector individually
TERMINALS CABLE SIDE
- Repair short in wire between ECM
(D11) and MAP sensor FEMALE
YES - Repair short in wire between ECM
Is there continuity? (D22) and TP sensor and / or IMA
(non-TWX model)
DO NOT

ECM CONNECTOR A (26P)

Check for open in the cables (lines IGP1,

IGP2):
1. Disconnect the fuel injectors and
connectors from the IAC valve.

2. Put the contact (II)

3. Measure the voltage between ground and
terminals A12, A13 of the ECM connector CABLE SIDE OF FEMALE
TERMINALS

- Repair open in the wires between

the ECM (A12, A13) and the main
DO NOT relay PGM-FI
Is there battery voltage? - Check if the connections are poor
or the cables of the main relay
YES PGM-FI are loose.

ECM CONNECTOR A (26P)

Check for open in the cables
(lines LG1, LG2):
1. Reconnect all connectors on
the
sensors.
2. Reconnect ECM connector D
(22P) to ECM CABLE SIDE OF FEMALE
TERMINALS
3. Make contact (II). Measure
Four. voltage between ground and
terminals A25, A26 of ECM
connector.

DO NOT
Repair open in the wires between
Is it less than 1V?
the ECM (A25, A26) and G101

YES

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

11-A-28
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Oxygen sensor (02S) (model with TWC)

Malfunction indicator light (MIL) indicates diagnosis code (DTC) 1: Oxygen sensor circuit
problem (02S)

The oxygen sensor detects the oxygen contained in the exhaust gas and transmits it to the ECM. When activated,
the ECM receives the signals from the sensor and varies the duration for which the fuel is injected. The 02S
It is installed in the exhaust manifold.
ATMOSPHERE
GAS FROM RELATIONSHIP

ESCAPE VOLTAGE (V) STOCHIOMETRIC

AIR-FUEL

PLATINUM

DELICIOUS RELA POOR

TION
- MIL on.
AIR-
- With the SCS short connector
COM-
connected (see page 11- A-14), code 1 is
BUS-
indicated
TIBLE

Check the fuel pressure:

1. Set the ECM (see page 11-A-15)

2. Check fuel pressure (see page 11-A-70

DO NOT
Go to page 11-A-64 (system ma of
It is normal? Fuel supply)

YES

Verification of the problem:

1. Start the engine. Keep the
engine at 3,000 rpm (min-1) with
no load (A / T in
positions N or P, M / T in neutral)
until the radiator fan starts.
Afterwards, keep it idling for at least
a minute

2. Connect the SCS short connector to

the service connector (page 11-A-14)

3. Starting at 1,600 rpm (min-

1) Accelerate using the fully open
throttle for at least 5 seconds. Then
slow down for at least 5 minutes
with the throttle

completely closed.

Intermittent fault; the system is fine

Does the MIL flicker DO NOT for the moment. Check for poor
connections or loose wires between
indicating code 1? 02S and ECM
(cont.)
YES

(On page 11-A-30)

11-A-29
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Oxygen Sensor (02S) (Model with TWC) (cont.)

(From p. 11-A-29)
CONNECTOR 02S

Check the 02S:

1. Remove the contact.
2. Disconnect the 02S connector.
3. Restart the
motor. Keep the engine at 3,000 rpm
(min-1) with no load (A / T in N or P
positions, M / T in neutral) until the
radiator fan starts. Afterwards, keep
it idling for at least a minute

4. Fully open the butterfly and

then release it.
5. On the 02S wiring, measure the
voltage between terminal no. 02S
connector 1 and ground TERMINAL SIDE OF MALE
TERMINALS

Is the voltage 0.6V with the throttle

fully open and less than 0.4V when DO NOT

the throttle is released quickly? Exchange 02S

YES

Check for short or open in the ECM CONNECTOR

cable (line 02S):
1. Remove the contact.
2. Reconnect the 02S connector
3. Restart the
motor. Keep the engine at 3,000 rpm
(min-1) with no load (A / T in N or P
positions, M / T in neutral) until the
radiator fan starts. Afterwards, keep
it idling for at least one minute.

4. Measure the voltage between terminals

D20 and A26 of the ECM connector.
CABLE SIDE OF FEMALE
TERMINALS

Is the voltage 0.6V with the throttle

fully open and less than 0.4V with DO NOT
Repair short or open in the wire
the throttle closed rapidly? between the 02S and the ECM (A20)

YES

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

11-A-30
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Manifold Absolute Pressure (MAP) Sensor

The fault indicator light (MIL) indicates the diagnosis code (DT C) 3: Problem
Electrical in Manifold Absolute Pressure (MAP) Sensor Circuit

The MAP sensor converts pressure The absolute function of the collector in electrical signals and transmits them to the ECM.
VOLTAGE OF
- MIL on
EXIT
UNIT OF
- With the SCS short connector SENSOR
connected (see page 11-
A-14) code 3 is displayed

Verification of the problem:

1.Tune up the ECM (see page
11-A-15)
2.Start the engine and let it idle
READING
OF THE

MEASURER

Intermittent fault; the system is OK

Does the MIL come on DO NOT
at the moment (a road test may be
indicating code 3? required). Check if connections or ECM CONNECTOR D (22P)
wires between MAP sensor and ECM
YES are loose

Check the ECM output voltage

(VCC1 line):
1. Remove the contact
2. Put the contact (II)
3. Measure the voltage
between terminals D10 and
D11 of the ECM connector. CABLE SIDE OF FEMALE
TERMINALS

Replace the ECM with a good one and

NOC recheck (see page 11-A-15). If the
Is it approx. 5 V? symptom and indication disappear,
replace the original ECM
YES

Check the ECM output voltage (MAP

line):
Measure the voltage between terminals D7
and D10 of the ECM connector

Replace the ECM with a good one and MAP SENSOR 3P CONNECTOR
YES recheck (see page 11-A-15). If the
Is it approx. 3 V? symptom and indication disappear,
replace the original ECM

DO NOT
SIDE D THE
CABLE
THE
Check for open in cable (SG1 TERMINALS
line): FEMALE
YES
Is it approx. 5 V? Measure the voltage between
terminals numbers 1 and 2 of the 3P
connector
DO NOT

DO NOT
Repair open in wire between ECM
Is it approx. 5V? (D10) and MAP sensor

YES

(On page 11-A-32) (On page 11-A-32) (cont.)

11-A-31
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Manifold Absolute Pressure (MAP) Sensor (cont.)

ECM CONNECTOR D (22P)

(From p. 11-A-31) (From p. 11-A-31)

Check the MAP sensor: Check for open in cable (MAP

CABLE SIDE OF FEMALE
1. Remove the contact. line):
TERMINALS
2. Disconnect the 3P connector from 1. Remove the contact.
the MAP sensor 2. Disconnect the 3P connector from MAP SENSOR 3P CONNECTOR
3. Put the contact (II). the MAP sensor.
4. Measure the voltage between 3. Put the contact (II)
terminals D7 and D10 of the ECM 4. Measure the voltage between SIDE OF THE
connector. terminals 2 and 3 of the MAP CABLE
sensor 3P connector. TERMINALS
FEMALE
YES
Is it approx. 5V? Change the
MAP sensor
DO NOT

DO NOT Repair open in wire between ECM

Check for open in cable (VCC1 Is it approx. 5V? (D7) and MAP sensor
line):
Measure the voltage between terminal YES
no. 1 of MAP sensor 3P connector and
ground Replace MAP sensor

DO NOT
Repair open in wire between ECM
Is it approx. 5 V? (D11) and MAP sensor

YES

Check for short in cable (MAP

line):
1. Remove the contact.
2. Disconnect ECM connector D
from ECM
3. Check continuity between ECM
connector terminal D7 and ground

YES Repair short in the wire between

Is there continuity? the ECM (D7) and the MAP sensor

DO NOT

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

11-A-32
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Engine Coolant Temperature Sensor (ECT)

The Malfunction Indicator Lamp (MIL) indicates Diagnostic Code (DTC) 6: Engine Coolant
Temperature Sensor (ECT) Circuit Problem.

The ECT sensor is a temperature sensitive resistor (thermoresistance). The resistance of the resistance
thermometer decreases when the temperature of the coolant increases, as shown in the figure
lower.
RESISTANCE
- MIL on
- With the SCS short connector
connected, code 6 is indicated (see p.
11-A-14)

Verification of the problem:

1. Tune up the ECM (see p.
11-A-15)
2. Put the contact (II).
THERMORESISTANCE
Intermittent fault; the system is ok at the
moment (a road test may be required). Check if TEMPERATURE OF
DO NOT connections or wires between ECT sensor, ECM ENGINE COOLANT
Does the MIL come on and climate control unit (KU model) are loose
indicating code 6?

YES
ECT SENSOR 2P CONNECTOR
Check the resistance of the
sensor:
1. Start the engine. keep the engine at
3,000 rpm (min-1) with no load (M / T
in neutral; A / T in N or P positions)
until the engine fan

radiator starts up. Then keep it idle. TERMINAL SIDE OF MALE

TERMINALS
2. Remove the contact.
3. Disconnect the 2P connector from
the ECT sensor. ECT SENSOR 2P CONNECTOR
4. Measure the resistance between the
2 terminals of the ECT sensor

DO NOT

Is it 200 - 400 ½? Canbie the ECT sensor

YES
TERMINALS CABLE SIDE
Check the ECM output voltage (ECT
line): FEMALE
1. Put the contact (II).
2. On the motor wiring side, measure
the voltage between terminal no. 1 of
ECT sensor 2P connector and ground

Check for open in cable (SG2

YES line):
Is it approx. 5V? Measure the voltage between
terminal numbers 1 and 2 of the
ECT sensor 2P connector

DO NOT Repair open in wire between ECM

Is it approx. 5V? (D21) and ECT sensor

YES
Replace the ECM with a good one and
recheck (see page 11-A-15). If the (cont.)
(On page 11-A-34) symptom and indication disappear,
replace the original ECM

11-A-33
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Refrigerator temperature sensor Engine Generator (ECT) (cont.)

(From p. 11-A-33)

(KU model)

Check the circuitry of the fuel ECT SENSOR 2P CONNECTOR

control unit.
air conditioning:
1. Remove the contact.
2. Disconnect the 20P connector
from the power control unit.
air conditioning.
3. Put the contact (II)
4. On the motor wiring side, measure
the voltage between terminal no. 1 of
ECT sensor 2P connector and ground TERMINALS CABLE SIDE

FEMALE

YES Replace the climate control unit

Is it approx. 5 V?

DO NOT

ECM CONNECTOR D (22P)

Check for open in cable (ECT
line):
Measure the voltage between ECM
connector terminal D9 and ground

YES Repair open in wire between ECM TERMINALS CABLE SIDE

Is it approx. 5 V?
(D9) and ECT sensor
FEMALE
DO NOT

Check for short in cable (ECT

line):
1. Remove the contact.
2. Disconnect the ECM connector D
(22P) from the ECM.
3. Check continuity between ECM
connector terminal D9 and ground

YES Repair short in the wire between

Is there continuity? the ECM (D9) and the ECT sensor

DO NOT

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

11-A-34
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Throttle position sensor (TP)

Malfunction indicator light (MIL) indicates diagnosis code (DTC) 7: Throttle position sensor
(TP) circuit problem.
The TP sensor is a potentiometer. It is connected to the shaft of the throttle valve. As the position of the butterfly
change, the sensor varies the voltage signal to the ECM.
MEDIUM
BRUSH
BRUSH
VOLTAGE
- MIL on DEPARTURE
- With the SCS short connector
(see page 11-A-14), code 7 is
RESISTANCE
indicated

Verification of the problem: OPENING

1. Tune up the ECM (see p. BUTTERFLY
BUTTERFLY
11-A-15) SLOW MOTION
AIBERTA
2. Start the engine
Intermittent fault; the system is OK TERMINAL
at the moment (a road test may be
Does the MIL come on indicating
DO NOT
required). Check if connections or BUSHING
code 7? wires between TP sensor and ECM
INSERTION
are loose
YES
Check the sensor output voltage:

1. Remove the contact.

2. Put the contact (II).
ECM CONNECTOR D (22P )
3. Measure the voltage between
terminals D6 and D21 of the ECM
connector.

Is the voltage approx. 0.5V with the

butterfly closed and 4.5V with the Replace the ECM with a good one
butterfly fully open? YES conditions and check again (see page CABLE SIDE OF FEMALE TERMINALS
11-A-15). If the symptom and indication
NOTE: There should be a smooth disappear, replace the original ECM
transition when releasing the
butterfly
TP SENSOR 3P CONNECTOR
DO NOT

Check the TP circuit:

TERMINALS CABLE SIDE
1. Remove the contact.
2. Disconnect the 3P connector from
FEMALE
the TP sensor.
3. Put the contact (II).
ECM CONNECTOR D (22P)
4. On the motor wiring side, measure
the voltage between terminal no. 3 of
the TP sensor 3P connector and
ground Check for open in cable (VCC2
line):
Measure the voltage between ECM CABLE SIDE
YES OF THE
Is it approx. 5V? connector terminal D22 and ground
TERMINALS
FEMALE
YES
YES Repair open in wire between ECM
Is it approx. 5V? (D22) and TP sensor
DO NOT

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

(On page 11-A-36)

(cont.)

11-A-35
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Throttle Position Sensor (TP) (cont.)

(From p. 11-A-35)

TP SENSOR 3P CONNECTOR
Check for open in cable (SG2
line):
On the motor wiring side,
measure the voltage between
terminals 1 and 3 of the TP sensor
3P connector

DO NOT
Repair open in wire between ECM
Is it approx. 5V?
(D21) and TP sensor
YES CABLE SIDE OF FEMALE
TERMINAL
Check for short in cable (TPS
line):
1. Remove the contact
2. Disconnect the 3P connector from ECM CONNECTOR D (22P)
the TP sensor.
3. Disconnect the ECM connector D
(22P) from the ECM.
4. Check continuity between ECM
connector terminal D6 and ground

CABLE SIDE OF FEMALE

TERMINALS

YES Repair short in the wire between

Is there continuity?
the ECM (D6) and the TP sensor
DO NOT
ECM CONNECTOR D (22P)
TP SENSOR 3P CONNECTOR
Check for open in cable (TPS
line):
Check continuity between ECM
connector terminal D6 and terminal
no. 2 of the TP sensor 3P connector
TERMINALS CABLE SIDE

FEMALE

YES
Is there continuity? Change the throttle body

DO NOT

Repair open in wire between ECM

(D6) and TP sensor

11-A-36
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

TDC sensor
Malfunction Indicator Lamp (MIL) indicates Diagnostic Code (DTC) 8: Top Dead Center (TDC)
Sensor Circuit Problem.

The TDC sensor determines the ignition advance and fuel injection timing.
It is integrated into the distributor.
SENSOR
- MIL on. TDC
- With the SCS short connector
connected (see p. 11-A-14), code 8 is
indicated

Verification of the problem:

1.Tune up the ECM (see page
11-A-15)
2.Place the ignition in the START
position (III) for at least 8
seconds

ROTOR

Intermittent fault; the system is OK

at the moment (a road test may be
Does the MIL come on
DO NOT required).
indicating code 8? Check if connections or cables
between distributor and ECM are
YES loose

Check for open in cable (LG1

line):
1. Remove the contact.
2.Disconnect the 7P connector from
the distributor
3.Check continuity between ground
and bnumber terminal
1 of distributor 7P connector

DO NOT
Repair open in wire between
Is there continuity?
distributor and G101

YES

Check for open in cable (IGP

line):
1. Make the contact (II0.
2.Measure the voltage between
terminal numbers 1 and 2 of the
distributor connector 7P

DO NOT Repair open in wire between main

Is there battery voltage? relay PGM-FI and distributor

YES

(On page 11-A-38) (cont.)

11-A-37
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

TDC Sensor (cont.)

DISTRIBUTOR 7P CONNECTOR

(From p. 11-A-37)

Check the ECM output voltage

(TDC line):
Measure the voltage between
terminals # 3 of the distributor
CABLE SIDE OF FEMALE
connector 7P and ground. Check for short in cable (TDC TERMINALS
line):
1. Remove the contact.
DO NOT 2. Disconnect ECM connector D (22P)
Is it approx. 5V? from the ECM.
3.Check continuity between terminal
YES number 3 of distributor connector 7P
and ground

YES Repair short in wire between

Is there continuity? distributor and ECM (D4)

DO NOT DISTRIBUTOR 7P CONNECTOR

Check for open in cable (TDC line):

Check continuity between ECM SIDE OF THE

connector terminal D4 and terminal no. CABLE
3 of the distributor 7P connector TERMINALS
FEMALE
CONNECTOR D ECM
DO NOT
(22P)
Check the TDC sensor: Is there continuity?
1.. Remove the contact.
2. Reconnect the 7P connector to
the manifold. YES
3. Place the contact.
4. Slowly turn the crankshaft
counterclockwise and measure the Replace the ECM with a good one and CABLE SIDE OF FEMALE
voltage between terminals D4 and recheck (see page 11-A-15). If the TERMINALS
A26 of the ECM connector. symptom and indication disappear,
replace the original ECM Repair open in wire between
NOTE: Do not start the engine
distributor and ECM (D4)

CONNECTOR
FROM THE ECM

Is the voltage about 0v 5V?

DO NOT
aChange the distributor ignition housing
(see section
2. 3)

YES

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

11-A-38
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Intake Air Temperature Sensor (IAT)

The Malfunction Indicator Lamp (MIL) indicates the Intake Air 10: Problem in
Temperature (IAT) Sensor Circuit Diagnosis Code (DTC).

The IAT sensor is a temperature sensitive resistor (thermoresistance). The resistance of the resistance
thermometer decreases as the air temperature increases, as shown in the figure
lower.
RESISTANCE (K½)

- MIL on.
- With the SCS short connector
connected (see p. 11-A-14).
code 10 is displayed

Verification of the problem:

1.Tune up the ECM (see page
11-A-15) THERMORESISTANCE INTAKE AIR TEMPERATURE
2. Make contact (II)
IAT SENSOR 2P CONNECTOR
Intermittent fault; the system ma is
good for now (a road test may be
Does the MIL come on DO NOT
required). Check if connections or
indicating code 10? wires between MAP sensor and ECM
are loose
YES

Check the resistance of the

TERMINAL SIDE OF MALE
sensor:
TERMINALS
1. Remove the contact.
2. Disconnect the 2P connector from
the IAT sensor.
IAT SENSOR 2P CONNECTOR
3.Measure the resistance between the
2 terminals of the IAT sensor.
NOTE: It may be necessary to remove
the IAT sensor to access the terminals

CABLE SIDE
DO NOT
OF THE TERMINALS
Is it 0.4 - 4 k½? Replace IAT sensor FEMALE

YES

Check the ECM output voltage (IAT

line):
1. Make the switch (II).
2.On the motor wiring side, measure
the voltage between terminal no. 2 of
the IAT sensor 2P connector and
ground.

Check for open in cable (SG2 ECM CONNECTOR D (22P)

YES line):
Is it approx. 5V? Measure the voltage between
terminal numbers 1 and 2 of the
DO NOT
IAT sensor 2P connector

Check for open in cable (IAT DO NOT Repair open in wire between ECM
line): Is it approx. 5V? (D21) and IAT sensor
Measure the voltage between ECM
connector terminal D8 and ground YES

Replace the ECM with a good one and (cont.)

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM
(On page 11-A-40)

11-A-39
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Intake Air Temperature (IAT) Sensor (cont.)

(From p. 11-A-39)

YES Repair open in wire between ECM

Is it approx. 5V? (D8) and IATZ sensor

DO NOT

ECM CONNECTOR D (22P)

Check for short in cable (IAT
line):
1. Remove the contact.
2. Disconnect the ECM connector D
(22P) from the ECM.
3. Check continuity between ECM
connector terminal D8 and ground.
TERMINALS CABLE SIDE

FEMALE
YES Repair short in the wire between
Is there continuity? the ECM (D8) and the IAT sensor

DO NOT

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

11-A-40
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle mixture regulator (IMA) (model without TWC)

Malfunction indicator light (MIL) indicates diagnosis code (DTC) 11: Idle mixture regulator (IMA) circuit problem.

The idle mixture regulator (IMA) is a resistance device used to control the idle mixture.

- MIL on IMA
- With the SCS short connector
connected (see page 11-A-
14), code 11 is displayed

Verification of the problem:

1. Tune up the ECM (see page
11-A-15)
2. Put the contact (II)
Intermittent fault; the system is ok at
the moment (a road test may be
required). Check for poor connections
DO NOT
Does the MIL come on indicating
code 11? or loose wires between IMA and ECM

YES
ECM CONNECTOR D (22P)
Check the ECM output voltage
(VCC2 line): Check the ECM output voltage
1. Remove the contact. (VCC2 line):
2. Make the switch (II). 1. Remove the contact.
3.Measure the voltage 2. Disconnect the 3P connector from
between terminals D21 and the IMA sensor. TERMINALS CABLE SIDE
D22 of the ECM connector 3. Put the contact (II).
4. Measure the voltage between FEMALE
DO NOT
terminals D21 and D22 of the
Is it approx. 5V? ECM connector.

YES
YES
Is it approx. 5V? Replace IMA sensor

DO NOT

Replace the ECM with a good one and

Check the output voltage of the ECM recheck (see page 11-A-15). If the
(IMA line): symptom and indication disappear,
Measure the voltage between ECM replace the original ECM
terminals D17 and D21.

Replace the ECM with a good one and

YES recheck (see page 11-A-15). If the IMA 3P CONNECTOR
Is it approx. 0.5 - 4.5 V? symptom and indication disappear,
replace the original ECM
DO NOT
SIDE OF THE
CABLE
TERMINALS
Check for open in cable (SG2 FEMALE
YES line):
Is it approx. 5V? 1. Remove the contact.
2.Disconnect the 3P connector from the
IMA.
3. Make the switch (II).
DO NOT

4.Measure the voltage between

terminals numbers 1 and 3 of the
IMA 3P connector

Repair open in wire between

DO NOT

Is it approx. 5 V?
ECM (D21) and IMA
YES

(cont.)
(On page 11-A-42) (On page 11-A-42)

11-A-41
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Idle Mixture Regulator (IMA) (Non-TWC Model) (cont.)

ECM CONNECTOR D (22P)
(From p. 11-A-41) (From p. 11-A-41)

IMA
Check the IMA: Check for open in cable (IMA
1. Remove the contact. line):
2. Disconnect the 3P connector from the Measure the voltage between CABLE SIDE OF FEMALE
IMA terminals 2 and 3 of the IMA 3P TERMINALS
3. Put the contact (II). connector.
4. Measure the voltage between
ECM terminals D17 and D21. IMA 3P CONNECTOR
CABLE SIDE
OF THE
TERMINALS
YES FEMALE
Change the
Is it approx. 5V?
IMA IMA
DO NOT

Check for open in cable (VCC2

Repair open in wire between ECM
DO NOT

line): Is it approx. 5V?

Measure the voltage between terminal (D17) and IMA
no. 1 of the IMA 3P connector and YES
ground

Change the IMA

Repair open in wire between

DO NOT

Is it approx. 5V?
ECM (D22) and IMA
YES

Check for short in cable (IMA

line):
1. Remove the contact.,
2. Disconnect the ECM connector D
(22P) from the ECM.
3. Check continuity between
ECM connector terminal D17
and ground

YES Repair short in the wire between

Is there continuity? IMA
the ECM (D17) and the IMA

DO NOT

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

11-A-42
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Ignition pulse signal

Malfunction indicator light (MIL) indicates diagnosis code (DTC) 15: Problem in the
circuit of the ignition input and output signal

- MIL on.
- With the SCS short connector
connected (see page 11-A-
14), code 15 is displayed

Verification of the problem:

1. Set up the ECM (see page 11-
A-15).
2. Start the engine

Intermittent fault; the system is ok at the

moment (a road test may be required). Check for
Does the MIL come on
DO NOT
poor connections or loose wires between
indicating code 15? distributor and ECM

YES

Check the ICM output: ECM CONNECTOR

1. Remove the contact.

2. Put the contact (II).
3. Measure the voltage
between terminals D15 and A26
of the ECM connector.

DO NOT

Is there battery voltage? (On page 11-A-14) CABLE SIDE OF FEMALE

TERMINALS
YES

Check for open in cable (IG PLS

line):
1. Remove the contact. CONNECTOR 7P FROM
2. Disconnect the 7P connector from DISTRIBUTOR
the distributor.
3.Disconnect ECM connector A (26P),
from the ECM.
4.Check continuity between
terminal no. 5 of the distributor 7P
connector and ECM connector SIDE OF THE
terminal A21 CABLE
TERMINALS
FEMALE
DO NOT
Repair open in wire between
Is there continuity? distributor and ECM (A21)

YES

Check for short in cable (PLS

IG line):
Check the continuity between
terminal no. 5 of the distributor 7P
connector and ground

YES Repair short in wire between

Is there continuity?
distributor and ECM (A21)
DO NOT

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM
(cont.)

11-A-43
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Ignition pulse signal (cont.)

(From p. 11-A-43)

CONNECTOR 7P FROM
Check for open in cable (IG R
line): DISTRIBUTOR ECM CONNECTOR D (22P)
1. Remove the contact.
2. Disconnect the ECM connector D
(22P) from the ECM.
3. Disconnect the 7P connector from
the manifold.
4. Check the continuity between
terminal no. 6 of the distributor 7P
connector and ECM connector TERMINALS CABLE SIDE CABLE SIDE OF FEMALE
terminal D15. TERMINALS
FEMALE

DO NOT
Repair open in wire between
Is there continuity? distributor and ECM (D15)

YES

Check for short in cable (IG R

line):
Check continuity between ground
and ECM connector terminal D15

YES Repair short in wire between

Is there continuity? distributor, test tach connector, and
ECM (D15)
DO NOT

Replace ignition housing of distributor

(see section 23)

11-A-44
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Speed sensor vehicle (VSS)

The indicator light for Malfunction (MIL) indicates diagnosis code (DTC) 17: Problem in the engine circuit
vehicle speed sensor.

The VSS generates pulses when the front wheels turn.

- MIL on.
- With the SCS short connector
connected (see page 11-A-
14), code 17 is displayed

Verification of the problem:

1. Tune up the ECM (see page
11-A-15)
2. Do a road test with the M / T in
second gear,
A / T in position 2 and accelerate to
4,000 rpm (min-1). Then decelerate
to 1,500 rpm (min-1) with the
throttle fully closed for at least 5
seconds

Intermittent fault; the system is fine

Does the MIL come on DO NOT
for the moment. Check for poor
indicating code 17? connections or loose wires between VSS
and ECM

YES
ATTENTION: Block the rear wheels before raising the
Check the input voltage of front of the vehicle
the ECM:
1. Remove the contact. ECM CONNECTORS
2. Chock the rear wheels and set the
parking brake. Raise the front of the
vehicle and support it on safety
stands.
3. Put the contact (II).
4. Lock the right front wheel and
slowly turn the left front wheel.
Measure the voltage between
terminals D2 and A26 of the ECM
connector
DELCABLE SIDE OF FEMALE TERMINALS

Replace the ECM with a good one and

Is the voltage 0 to 12V? YES recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

DO NOT

Check the circuit (VSS line):

1. Remove the contact.

2. Disconnect connector B
(16P) from ECM.
3. Make the switch (II).
4.Lock the right front wheel and
turn the left front wheel slowly.
Measure the voltage between
terminals D2 and
ECM connector A26

- Repair short in wire between

Is the voltage 0 to 12V?
DO NOT

ECM (D2) and VSS.

- Repair open in wire between
ECM (D2) and VSS.
YES - If the cable is ok, test the VSS
(see section
Replace the ECM with a good one 2. 3).
and recheck (see page 11-A-15). If he

symptom and indication disappear,

replace original ECM

11-A-45
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Lock-up control solenoid valve (A / T)

Malfunction indicator light (MIL) indicates diagnosis code (DTC) 19: Problem in the circuit of
valves A and / or B lock-up control solenoids.

- MIL on.
- With the SCS short connector
connected (see page 11-A-
14), code 19 is displayed

Verification of the problem:

1. Set up the ECM (see page 11-A-15).

2. A road test is required. Drive the

vehicle for several kilometers changing
the
transmission up and down several times

Intermittent fault; the system is ok at

the moment (a road test may be
Is the MIL flashing indicating DO NOT
required). Check if the connections are
code 19? poor or the wires between the A / B
valves and the ECM are loose.

YES
ECM CONNECTOR A (26P)
Check for short in cable (LC A
and / or LC B * line):
1. Remove the contact.
2. Disconnect connector A (26P)
from the ECM.
3. Disconnect the 2P connector from
the lock-up control valves A / B.

4. Check continuity between

ground and ECM connector CABLE SIDE OF FEMALE
terminals A9 and / or A8 *, TERMINALS
individually. *: Valve B lock-up control solenoid

YES Repair short in the wire between the

Is there continuity? A / B lock-up control solenoid valves
and the ECM (A9, A8 *)

DO NOT

Check the A / B solenoid lock-up

control valves:
1 Reconnect the 2P connector.

2. Measure the resistance between

terminals A9 and A26 of the ECM LOCK-UP CONTROL SOLENOID VALVE
connector and / or A8 and A26 * CONNECTOR

DO NOT Check for open in the cable (line SIDE OF THE

Is it 10 - 22 ½? LC A and / or LC B *): CABLE
Check the continuity between THE
terminal no. 2 of the 2P connector of TERMINALS
YES the lock-up control solenoid valve FEMALE
and terminal no. 9 of the ECM
connector (terminal No. 1 of the lock-
up control solenoid valve 2P
Replace the ECM with a good one and connector and terminal A8 of the
recheck (see page 11-A-15). If the ECM connector) *.
symptom and indication disappear,
replace the original ECM
YES Replace solenoid valve d e control
Is there continuity? lock-up (see section 14)

DO NOT

Repair open in wire between A / B

solenoid lock-up control valves (A9,
A8) *

11-A-46
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Electric Charge Detector (ELD) (D15Z5 Engine)

Malfunction Indicator Lamp (MIL) indicates Diagnostic Code (DTC) 20: Electrical Load
Detector (ELD) Circuit Problem.

With the SCS short connector

connected (see page 11-A-
14), code 20 is displayed

Verification of the problem:

1. Set up the ECM (see page 11-
A-15).
2. Start the engine and keep it
idling.
3. Turn on the lights.

Intermittent fault; the system is ok

at the moment (a road test may be
DO NOT required).
Does the MIL indicate code 20?
Check for poor connections or
YES loose wires between ELD and ECM

ECM CONNECTORS
Check the input signal
from the ECM:
1. Remove the contact.
2.Start the engine and keep it
idling.
3. Measure the voltage
between terminals D17 and ¡26
of the ECM connector.
4.While measuring the voltage
between terminals D17 and A26 of
the ECM connector, turn the lights CABLE SIDE OF FEMALE
(low) TERMINALS

Replace the ECM with a good one and

Did you lower the voltage when you put the
YES recheck (see page 11-A-15). If the
lights on?
symptom and indication disappear,
replace the original ECM

DO NOT

Check the ELD circuit:

1. Turn off the lights.
2. Disconnect the 3P connector from ELD 3P CONNECTOR
the ELD.
3. Put the contact (II).
4. Measure the voltage between
terminals number 1 and 2 of the
ELD 3P connector.

CABLE SIDE OF FEMALE

TERMINALS
(On page 11-A-48)

(cont.)

11-A-47
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

PGM-FI system

Electrical Load Detector (ELD) (D15Z5 Engine) (cont.)

ELD 3P CONNECTOR
(From p. 11-A-47)

Check by open in the cable:

DO NOT

Is there battery voltage? CABLE SIDE

Measure the voltage between terminal no.
OF THE
1 of the ELD 3P connector and ground.
YES TERMINALS
FEMALE

YES
Check the cable (EL line): Repair open in wire between ELD
Is there battery voltage? and G402
Measure the voltage between
terminal no. 3 of ELD 3P connector
and ground DO NOT

Repair open in wire between fuse

no. 15 SENSOR SP ALTERNATOR
(7.5A) from the fuse and relay box
under the dash and the ELD

Check for open or short in wire

between ECM (D17) and ELD.
DO NOT

Is it approx. 5V? If the cable is ok, replace the ECM with a

good one and check again (see p. 11-A-15)
YES

Replace the fuse and relay box

under the hood

11-A-48
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle control system

System Troubleshooting Guide

NOTE:
• Each line of the graph lists the systems that could be the cause of the symptom, lined up in the order they
should be inspected, starting with 1. Locate the symptom in the left column, read to the nearest cause, and
refer to the page indicated at the top of the column. If the inspection shows that the system is operating
correctly, then look at the system plus 0 next 2, and so on.

• If the idle speed is out of specification and the Malfunction Indicator Lamp (MIL) does not indicate
For DTC 14, inspect per page 11-A-51.

PAGE SUBSYSTEM SCREW VALVE SIGN SIGN SIGN SIGN SIGNAL INT. POSITION SIGNAL CONEXIO-
ADJUSTMENT CONTROL ENC. FR AIR INTE- INTE- PRESSURE TION CHANGE-BIO NES AND
SLOW MOTION AIR CONDITION ALTERNATE- RRUP- ADDRESS SWITCH TRANS- MANGUI-
SLOW MOTION CIONADO DOR TOR STARTER ASSISTED
AUTO MISSION
(D15Z5 engine)
BRAKES MATICA (A / T)

SYMPTOM

Difficulty starting cold

Cold, fast idle out of

specification (1,000-2000
rpm - min-1)

Rough idle

Hot, engine speed too high

Speed of
idle less than
motor speed
(without charge)

Speed of
idle does not increase
after startup
initial

On models with
auto transmission
math, speed
In low idle while
hot, running
speed
age of Speed of
motor idle low when
put the A / C
excess
do low
The speed of the
low idle when turning the
steering wheel

Fluctuation of
speed of
idle with load
electric

DURING THE
HEATING
Draft
frequent
BEHIND THE
HEATING

Emissions test failure

11-A-49
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Control system d idle

System description
Engine idle speed is controlled by the idle control valve (IAC).
The valve modifies the amount of air transmitted to the intake manifold in response to the electrical current
controlled by the ECM. When activated, the IAC valve opens to maintain the speed of the
proper idle.

D14A3, D14A4, D15Z4 and D15Z5 engines:

RELAY
MAIN PGM-FI

VARIOUS
NDE SENSORS

REFRIGERANT
THE MOTOR

VALVE
IAC

COLLECTOR
ADMISSION

D16Y4 and D16Y9 engines:

RELAY
MAIN PGM-FI

NDE VARIOUS
SENSORS

REFRIGERANT
THE MOTOR

COLLECTOR IAC VALVE

ADMISSION

11-A-50
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

1. When the engine has started, the IAC valve opens momentarily. The amount of air is increased to
raise the idle speed to approximately 150 - 300 rpm (min-1).

2. When the coolant temperature is low, the IAC valve opens to obtain the proper idle speed. The amount
of transmitted air is controlled in relation to the temperature of the engine coolant.

SPEED
OF THE IDLE
rpm (min-1)

TEMPERATURE OF
COOLANT
MOTOR

1. When the idle speed is out of specification and the Malfunction Indicator Lamp (MIL) does not flash DTC 14,
check the following items:
• Adjust the idle speed (page 11-A-63).
• Air conditioning signal (see page 11-A-54). FR ALT signal (see
• page 11-A-56).
• Brake switch signal (see page 11-A-57).
• Starter switch signal (see page 11-A-58). PSP switch signal (D15Z5 Engine)
• (see page 11-A-59). A / T shift position signal (see page 11-A-61). Sleeves and
• connections.
•
• IAC valves and their mounting o-rings.

2. If all of the items listed above are correct, replace the IAC valve with a good one and re-adjust the
idle speed (see page 11-A-63).

• If the idle speed still cannot be adjusted to specification (and the MIL does not indicate code 14) after
replacing the valve, replace the ECM with a good one and recheck. If the symptom disappears, replace
the original ECM.

11-A-51
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle control system

Idle Air Control Valve (IAC)

Malfunction indicator light (MIL) indicates diagnosis code (DTC) 14: Idle air control valve (IAC)
problem.

The IAC valve modifies the amount of air transmitted to the throttle body based on the signal from the ECM, in order to
maintain proper idle speed.

MEDIUM
BIMETALLIC

BIMETAL
- MIL on.
- With the SCS short connector
connected (see page 11-A-
14), code 14 is displayed

Verification of the problem:

1. Set up the ECM (see page 11-
A-15). AXIS VALVE STOP
2. Put the contact (II)

Intermittent fault; the system is fine for

the moment. Check for poor
DO NOT

Is the MIL flashing and is code

connections or wires between the IASC
14 displayed? valve and the ECM
they are loose
YES CONNECTOR A FROM ECM (26P)

Check the input voltage of the ECM:

Measure the voltage between ground

and terminals A6, A7 * of the ECM
connector individually. *: Line to IACV N

DO NOT

Is there battery voltage? (On page 11-A-53) CABLE SIDE OF FEMALE

TERMINALS
YES

Check the IAC valve of the ECM: IAC VALVE 3P CONNECTOR

1. Remove the contact.

2. Disconnect the 3P connector from
the IAC valve.
3. Measure the resistance between
terminals 1 and 3 of the IAC valve 3P
connector.
DO NOT
TERMINAL SIDE OF MALE
TERMINALS
Is it 16-28½? Replace the IAC valve.

YES

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM

11-A-52
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

(From p. 11-A-52)

IAC VALVE 3P
Check for open in cable (IGP CONNECTOR
line):
1. Remove the contact.
2. Disconnect the 3P connector from
the IAC valve.
3. Put the contact (II).
CONNECT R 3P OF THE
4. In the wiring, measure the voltage
IAC VALVE
between terminal no. 2 of
IAC valve 3P connector and ground.
CABLE SIDE OF FEMALE
TERMINALS

Check the IAC valve:

Measure the resistance between
DO NOT

Is there battery voltage? terminals 1 and 3 of the IAC valve 3P TERMINAL SIDE OF MALE
connector TERMINALS
YES
DO NOT

Is it 18-28½? Replace the IAC valve.

YES

Check for open in the cable (line Repair open in wire between
ACV, P, IACV N *): IAC valve and PGM-FI main relay
1. Remove the contact.
2. Disconnect connector A from the
ECM (26P).
3. Check the continuity between
terminal no. 3 of the IAC valve 3P
connector and ECM connector
terminal A7 (terminal # 1 of the IAC
valve 3P connector and terminal A6
of the ECM A6 connector) *.
*: IACV N line

DO NOT
Repair open in wire between IAC CABLE SIDE OF FEMALE
Is there continuity? valve and ECM (A7, A6 *). TERMINALS

YES

Check for short in cable (IACV P

line, IACV N *):
Check continuity between ground
and ECM connector terminals A7, A6
* individually

YES Repair open in wire between IAC

Is there continuity? valve and ECM (A7, A6 *).

DO NOT

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM.

11-A-53
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle control system

Air conditioning signal

Sends signals to the ECM when the air conditioning system needs cooling.

Air conditioning signal inspection ECM CONNECTOR A (26P)

Check the output voltage of the

ECM (ACS line):
1. Remove the contact. CABLE SIDE OF FEMALE
2.Disconnect the 2P connector from TERMINALS
the A / C pressure switch.
3. Make the contact (II)
4.Measure the voltage
between terminals A23 and
A26 of the ECM connector

Check for short in cable (ACS

line):
1. Remove the contact.
DO NOT
2. Disconnect connector A from the
Is it approx. 5V? ECM (26P).
3. Check continuity between ECM
YES connector terminal A23 and ground

YES Repair short in the wire between

Is there continuity? the ECM (A23) and the A / C
pressure switch
DO NOT

Check the A / C compressor - Replace the ECM with a good one and
clutch: check again (see page 11-A-15) ç If the
1. Remove the contact. specified voltage is not obtained, replace
2. Reconnect the A / C pressure the original ECM
switch 2P connector to the pressure
switch. - See the air conditioning inspection
3. Put the contact (II). (see section
4. Momentarily connect terminals 22)
A20 and A26 of the ECM connector
several times

(On page 11-A-55)

BRIDGE

11-A-54
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

(from p. 11-A-54)
FUSE AND RELAY BOX 9P
CONNECTOR UNDER THE HOOD

Check for open in cable (ACC

line):
Is there a clicking sound in the A / C DO NOT
Momentarily connect terminal no. 5
compressor clutch?
of the 9P connector of the under
hood fuse and relay box to ground
YES several times
CABLE SIDE OF FEMALE
TERMINALS

DO NOT
Is there a clicking sound in the A / C Consult air conditioning inspection
compressor clutch? (see section
22)

YES

Check the A / C operation: Repair open in cable between ECM

1. Start the engine. (A20) and A / C clutch relay
2. Activate the fan
3. Turn on the air conditioner

Check for open in the cable (DHW

DO NOT
line):
Does the A / C work? Measure the voltage between terminals A23
and A26 of the ECM connector
YES

A / C signal is ok
ECM CONNECTOR A (26P)

DO NOT

Is the voltage less than 1V? Repair open in wire between ECM
(A23) and A / C switch

YES

- Replace the ECM with a good one to be

checked (see page 11-A-15). If the
symptom and indication disappear,
replace the original ECM.

- See the air conditioning inspection

(see section
22).

11-A-55
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle control system

Alternator FR signal (ALT)

It sends signals to the ECM when the alternator (ALT) is charging.

ECM CONNECTORS
ALT FR signal inspection

Check the ECM output voltage

(ALTF line):
1. Remove the contact.
2. Disconnect the 3P connector
(D15Z5: 4P engine) from the ALT
(alternator).
3. Put the contact (II. CABLE SIDE OF FEMALE
4. Measure the voltage TERMINALS
between terminals D18 and
A26 of the ECM connector).
Check for short cable n the
(ALTF line:
1. Remove the contact.
DO NOT
2. Disconnect connector D (22P) from
Is it approx. 5V? ECM.
3. Check continuity between ECM
YES connector terminal D18, and ground.

Check the FR ALT signal:

1. Remove the contact.
2. Reconnect the connector
3P ALT (D15Z5: 4P engine) to
alternator. YES Repair short in the wire between
3. Start the engine; keep it at 3,000 Is there continuity? the ECM (D18) and the alternator
rpm (min-1) with no load (M / T in
neutral; A / T in N or P positions) DO NOT

until the radiator fan starts. Then

keep it idling.

Replace the ECM with a good one and

4. Measure the voltage check again (see page 11-A-15). If the
between terminals D18 and A26 specified voltage is not obtained, replace
of the ECM connector. the original ECM.

Does the voltage drop when you YES

turn on the lights and activate the ALT FR signal is correct
rear fog lamp?
ALTERNATOR CONNECTORS
DO NOT

Except D15Z5 engine: D15Z5 engine:

Check for open in cable (ALT F 3P 4P
line):
1. Remove the contact.
2 Disconnect the 3P connector
(D15Z5 motor: 4P) from the
alternator. BRIDGE
3. Put the contact (II).
4. Measure the voltage between the
terminal no. 1 of the alternator 3P BRIDGE
connector (D15Z5 engine: no. 4) and
ground

DO NOT
Repair open in wire between ECM
Is it approx. 5V? (D18) and alternator

YES

See Alternator Inspection

(Section 23)

11-A-56
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Brake switch signal

It transmits signals from the ECM when you depress the brake pedal.

Inspection of the switch signal

the breaks

Do the lights come on without YES Inspect the brake switch

pressing the brake pedal? (section 19)

DO NOT

Check the brake switch circuit:

Step on the brake pedal

DO NOT Inspect the HORN (horn) fuse (15A), in the fuse

Do the brake lights come on? and relay box under the hood

YES

- Repair short in wire between

DO NOT
brake switch and HORN fuse (15A)
Is the fuse okay?
- Change the horn fuse (15A)
YES

- Repair open in wire between

brake switch and HORN fuse (15A):
Check the input voltage of
the ECM (brake switch line): - Inspect the brake switch
(section 19)
1.Press the brake pedal.
2.Measure the voltage between
terminals A16 and A26 of the ECM ECM CONNECTOR A (26P)
connector with the brake pedal
depressed.

DO NOT Repair open in wire between CABLE SIDE OF FEMALE

Is there battery voltage? ECM (A16) and brake switch TERMINALS

YES

Brake switch signal is correct

11-A-57
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle control system

Starter switch signal

It transmits signals to the ECM while the engine is starting.

Starter switch signal inspection

ECM CONNECTOR A (26P)

Check the input voltage of

the ECM (starter motor line):
Measure the voltage between
terminals A10 and A26 of the ECM
connector with the ignition turned to
the START position.
(III).
NOTE: M / T in neutral; A / T in N CABLE SIDE OF FEMALE
or P positions.
TERMINALS

DO NOT
Inspect fuse no. 31 STARTER
Is there battery voltage? SIGNAL (starter motor signal) in the fuse and
relay box under the dash.

YES

- Repair short in wire between ECM

(A10) and fuse no. 31 STARTER
SIGNAL (7,5A), or the main relay
PGM-FI
DO NOT
The signal of the int. starter motor is correct
Is the fuse okay?
- Change the fuse no. 31 STARTER
YES SIGNAL (starter motor signal) (7.5A)

Repair open in wire between ECM

(A10) and fuse #. 31 STARTER
SIGNAL (starter motor signal) (7.5A)

11-A-58
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Power Steering Pressure Switch (PSP) Signal (D15Z5 Engine)

It transmits signals to the ECM when the power steering load is high.

Int signal inspection. power steering

pressure (PSP) ECM CONNECTOR A (26P)

Check the pressure circuit of

the PSP switch:
1. Put the contact (II).
2. Measure the voltage
between terminals A11 and A26
of the ECM connector. CABLE SIDE OF FEMALE
TERMINALS

2P CONNECTOR
Check for open in wire (PSP switch
DO NOT
POWER STEERING PRESSURE SWITCH
Is it less than 1V? line):
1. Remove the contact.
2. Disconnect the 2P connector from
YES the PSP switch.
3. Put the contact (II).
4. On the motor wiring side, BRIDGE
connect terminals 1 and 2 of the
PSP switch 2P connector.

5. Measure the voltage between

terminals A11 and A26 of the ECM
connector.

- Repair open in wire between

ECM (A11) and PSP pressure
DO NOT
switch.
Is it less than 1V? - Repair open in wire between PSP
pressure switch and G101.
YES

Check the output voltage of the ECM

(steering pressure switch line): Change the PSP switch.
1.Start the engine.
2.Rotate the steering wheel slowly.
3.Measure the voltage between terminals
A11 and A26 of the ECM connector

ECM CONNECTOR A (26P)

CABLE SIDE OF FEMALE

TERMINALS

YES The PSP switch signal is correct.

Is there battery voltage?

DO NOT

(On page 11-A-60) (cont.)

11-A-59
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle control system

Power Steering Pressure Switch (PSP) Signal (D15Z5 Engine)

(cont.)

(From p. 11-A-59)

Check the PSP switch:

1. Remove the contact.
2. Disconnect the 2P connector ECM CONNECTOR A (26P)
from the pressure switch.
3. Put the contact (II).
4. Measure the voltage
between terminals A11 and A26
of the ECM connector.

CABLE SIDE OF FEMALE

TERMINALS

YES
Is there battery voltage? Replace the PSP pressure switch.

DO NOT

Check for short in circuit

(pressure switch line):
1. Remove the contact.
2. Disconnect connector A (26P)
from the ECM.
3.Check continuity between
ECM connector terminal A11
and ground

YES Repair short in wire between ECM (A11)

Is there continuity? and PSP pressure switch.

DO NOT

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
voltage is now available

specified, replace the original ECM.

11-A-60
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Automatic transmission shift position signal (A / T)

Transmits signals to the ECM when the transmission shifts to N or P positions.

A / T shift position signal

inspection

Check the A / T gear

position signal:
1. Put the contact (II).
2. Look at the change placeholder
and select
each position separately.

Does the indicator light DO NOT

See A / T shift position indicator inspection
(section 14)
correctly?

YES ECM CONNECTOR A (26P)

Check the ECM output voltage

(shift position int line A / T):

1. Remove the contact.

2. Disconnect the 14P connector
from the shift position switch A / T. CABLE SIDE OF FEMALE
TERMINALS
3. Put the contact (II).
4. Measure the voltage
between terminals A22 and A26
of the ECM connector.

Check for short in wire (A / T shift

position switch line):

DO NOT
1. Remove the contact.
Is it approx. 5V?
2. Disconnect ECM connector A (26P) ç

YES 3. Check continuity between ECM

connector terminal A22 and

YES Repair short in the wire between

Check for open in cable (A / T
shift position int line): Is there continuity? the ECM (A22) and the gauge
cluster
1. Remove the contact. DO NOT

2. Reconnect the 14P connector to

the A / T shift position switch.

3. Start the engine. Replace the ECM with a good one and
4. Measure the voltage between terminals recheck (see page 11-A-15). If the
A22 and A26 of the ECM connector with voltage is now available
the transmission in the N and P positions.
specified, replace the original ECM

(cont.)
(On page 11-A-62)

11-A-61
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle control system

Automatic Transmission Shift Position Signal (A / T) (cont.)

(From p. 11-A-61)
- Repair open in wire between
ECM (A22) and gauge cluster.
DO NOT

Is it less than 1V? - Repair open in wire between

set of
YES A / T shift position switch and
indicators

ECM CONNECTOR A (26P)

Check for short in cable (A / T shift
position int line):

Measure the voltage between terminals A22

and A26 of the ECM connector with the
transmission in gear.

CABLE SIDE OF FEMALE

TERMINALS
DO NOT
Repair short in the wire between the
Is there battery voltage? ECM (A22) and the gauge cluster

YES ECM CONNECTORS

Check for open in cable (A / T position

change int line D3 and D4 *):

Measure the voltage between ECM terminals

D5, D16 *, and A26 with the
transmission in positions D3 and D4 *
individually
*: Po sition D4

Repair open in wire between ECM

CABLE SIDE OF FEMALE
Is it less than 1V?
DO NOT

(D4, D16 *) and shift position switch TERMINALS

A/T
YES

Check for short in cable (A / T position

change int line D3 and D4 *):

Measure the voltage between terminals D5,

D16 *, and A26 of the ECM connector with the
transmission in the N or P positions.

DO NOT
Repair open in wire between ECM
Is there battery voltage? (D5, D16 *) and shift position switch
A/T

YES

The signal of the int. shift position A /

11-A-62
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Idle speed adjustment

Inspection and adjustment Four. Adjust the idle speed, if necessary, by turning
the adjusting screw a half turn clockwise and
Adjust the idle speed using a Honda PGM tester. In counterclockwise.
case you use a di st into procedure, check the
following items: D14A3, D14A4, D15Z4 and D15Z5 engines:
NOTE: If you remove the air cleaner housing, do
not disconnect the IAT sensor connector.
NOTE: Before adjusting the idle speed, TOP
check:
- MIL off.
- Ignition advance.
- Plugs SCREW
- Air filter ADJUSTMENT
- PCV system OF THE
SLOW MOTION

1. Connect a tachometer.

CONNECTOR TACHOMETER
TEST TACHOMETER

D16Y4 and D16Y9 engines: TOP

SCREW
ADJUSTING THE
SLOW MOTION

BATTERY

2. Start the engine. Maintain engine speed at 3,000

rpm (min-1) with no load (M / T in neutral; A / T
in N or N positions. 5. After turning the adjusting screw half a turn, check the idle
P) until the radiator fan starts. speed again. If it is out of specification, turn the adjusting
screw half a turn again.

NOTE: Do not turn the adjusting screw more than half a turn
3. Check the idle speed with no load: headlights, without checking the idle speed.
fan, rear fog, radiator fan and air conditioning.
6. Keep the engine idling for one minute with the fan switch in the
disabled. HI position and the air conditioning on. Then check the idle
speed.
NOTE (KS model): Remove fuse no. 18 (7.5A), in the
The idle speed should be: D15Z5 engine:
under-dash fuse and relay box, and check that the
lights and side direction indicators go out.

(in N or P positions)
Intake speed should be: D15Z5
motor: Except D15A5 engine:

(in N or P positions) (in N or P positions)

NOTE:
Except D15Z5 engine: • Do not turn the adjusting screw with
the air conditioner on.
• If the idle speed is not specified, refer to the
(in positions N ´or P) troubleshooting guide on page 11-A-12.

11-A-63
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

System Troubleshooting Guide

NOTE: Each line of the graph lists the subsystems that could be the cause of the symptom, lined up in the order
in which they should be inspected, starting with 1. Locate the symptom in the left column, read to the nearest
cause, and refer to the page indicated in the top of the
column. If the inspection shows that the closest system is working properly, then look in the
system 2, and so on.

PAGE SUBSYSTEM LINES OF INJECTOR REGULATOR FILTER PUMP RELAY FUEL

COMBUS- OF THE COM- PRESSURE OF COMBUS- COMBUS- PRINCIPAL CONTAMINATES-
TIBLE BUSTIBLE FUEL TIBLE TIBLE PGM-FI DO
SYMPTOM

DIFFICULTY STARTING

DIFFICULTY STARTING
WHEN THE ENGINE IS COLD
OR HOT

BRUSH IDLE

SWITCHED ON
IRREGULAR OR
START
ABRUPT

UNDER FAILURE OF THE

PERFORMANCE TEST
EMISSIONS

WASTE OF
POWER

DURING THE
HOT-
DRAFT I LIE
FREQUENT
AFTER THE
HOT-
I LIE

11-A-64
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel lines
NOTE: Check the fuel system lines, hoses, or filter for damage, leaks, or deterioration. Change them if
necessary.

28 Nm (2.8 kgf.-m.)
(D16Y4 and
D16Y9: 22 Nm (2.2
kgf.-m.)

11-A-65
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

NOTE: Check all hose clamps and retighten, if it is accurate.

CONNECTION TUBES
QUICK AND FUEL PIPE

FILTER
FUEL

CONTROL FILTER
DEPOSIT PUMP
OF VAPOR EMISSIONS
(EVAP) UNIT OF FUEL
SUPPLY OF
INDICATOR OF
FUEL
TO THE REGULATOR BOARD OF
PRESSURE OF BASE
FUEL Change

BOARD OF
BASE
Change

Clamp in the middle

Clamp in the middle

11-A-66
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel pipe and quick connect joints

Cautions Disconnection

CAUTION: Do not smoke while working on the fuel CAUTION: Do not smoke while working on the fuel
system. Avoid flames in the work area. system. Avoid flames in the work area.

The fuel tube assembly and quick connect joints 1. Disconnect the negative battery cable.
connect the fuel pump to the feed tube. To remove or
install the pump and reservoir, it is necessary to 2. Remove the cap from the fuel filler flap and
disconnect or connect the quick connect joints. relieve fuel pressure from the tank.
Observe the following items:

3. Relieve fuel pressure (see page 11-A-71).

• The tube and gasket assembly is not heat
resistant; avoid damaging it during welding
operations or procedures that generate heat. Four. Check the quick connect gaskets for dirt and
clean them if necessary.

• The tube and gasket assembly is not resistant to 5. Hold the connector with one hand and press the
acids; do not touch it with rags that have been retaining tabs with the other to remove the
used to clean the battery electrolyte. Replace the connector.
tube assembly and gaskets if it comes in contact
with NOTE:
electrolytes or the like. • Avoid damaging the tube or other parts.
Do not use tools.
• When connecting or disconnecting the set of tubes • If the connector does not move, keep the
and quick joints, avoid bending or twisting it tabs depressed and alternately pull and
excessively. Replace it if it is damaged. push the connector until it can be easily
removed.
Quick connect joints can be reconnected, but the • Do not remove the tube retainer; once
contact tube retainer cannot be used again once it is removed, the seal must be replaced with a
removed from the tube. Change the seal: new one.
CLOSURE PIN
- when changing the fuel pump.
- when changing the fuel supply pipe.
TONGUE OF
- after removing the tube. RETAIN
- if it is damaged.
PANEL OF TUBE
ACCESS
RETAIN

CONNECTOR
Press
6. Check if the contact area of the tube is dirty or
deteriorated.
- If the surface is dirty, clean it.
- If the surface is rusted or deteriorated, change
the tank and the fuel supply pipe.

AREA OF
CONTACT

CONNECTOR

RETAIN
TUBE
TUBE (cont.)
FUEL

11-A-67
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

Fuel pipe and quick connect joints

7. To avoid damage and contact with foreign Connection
substances, cover the disconnected connector
and the end of the tube with plastic bags. CAUTION: Do not smoke while working on the fuel
system. Avoid flames in the work area.

1. Check if the contact area is dirty or damaged

and clean it if necessary.

CONTACT AREA

BAGS
PLASTIC TUBE

NOTE:
• The retainer cannot be used again once it
has been removed from the tube.
AC mbie the catch: 2. Insert a new retainer into the connector if
- when changing the fuel pump. the retainer is damaged or after:
- when changing the fuel supply pipe. - change the fuel pump.
- change the fuel supply pipe.
- after it has been removed from the tube.
- remove the tube retainer.
- if it is damaged.
RETAIN NEW
(Insert in the
connector)

TUBE OF
FUEL

CONNECTOR

11-A-68
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Before connecting a new set of tube and quick Four. Check that the connection is firm and that the
connect joints, remove the old retainer from the pins are firmly locked in place; visually check
contact tube. and pulling
connector.

Pull apart

With the
tabs
separated,
extract the CONNECTOR
catch

RETAIN TUBE

NEW SET 5. Reconnect the nega cable tive of the

OF TUBE
FUEL AND battery and turn on the ignition (II). The fuel
BOARDS OF pump should run for approximately two seconds
FAST CONNECTION and the fuel pressure should increase. Repeat
this operation two or three times and check that
3. Align the quick connect joints with the tube and there are no air leaks in the fuel supply system.
align the locking pins on the retainer with the
slots in the connector. Then insert the quick
connect joints into the tube until the retainer pins
are locked after the clicking sound.

NOTE: If connection is difficult, apply a small

amount of new oil to the end of the tube.

Connection with new seal:

CONNECTOR

RETAIN

TUBE

Reconnection of existing seal:

CONNECTOR

RETAIN

TUBE

11-A-69
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

System description Fuel pressure

The fuel supply system consists of a tank, an internal Relief
high pressure pump, the main relay PGM-FI, a filter, a
pressure regulator, the injectors and the fuel supply Before disconnecting fuel lines or hoses, relieve system
and return lines. fuel. This system supplies fuel at pressure by loosening the service screw at the top of
the channel.
regulated pressure to the injectors and cuts off the
supply when the engine is not running. AT ENCION:
• Do not smoke while working on the fuel
system. Avoid flames in the work area.
• Be sure to relieve fuel pressure while
ignition is off.
1. Disconnect the negative cable from the
negative battery terminal.
2. Remove the fuel filler flap.
3. Use a socket wrench on the fuel filter service
screw while holding the special tool with the
other wrench.
Four. Place a rag over the service screw.
5. Slowly loosen the service screw one full turn.

SCREW
SERVICE
12 Nm (1.2 kgf.-
m.)

RAG

NOTE:
• A pressure gauge can be installed in the
service screw hole. Always change the
• washer between the service screw and the
special screw when loosening the service
screw.
• Change all washers when removing
screws.

11-A-70
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel injectors
Inspection Description

1. Relieve fuel pressure (see page 11-A-70). Fuel injectors are constant stroke fuel injectors
consisting of a solenoid, a needle piston valve and a
2. Remove the fuel filter service screw while housing. When the solenoid coil is energized, the
holding the special screw with the other wrench. valve rises and there is an injection of pressurized
Install the special tool. fuel. Since the valve lift and fuel pressure are
constant, the amount injected is determined by the
opening time of the valve (that is, the duration for
METER OF which the current is transmitted to the solenoid
PRESSURE OF CLAMP
FUEL cylinder). ). The fuel injector is sealed by an O-ring and
by a ring at the top and bottom. These seals also
reduce noise during operation.

FILTER
ACCOMMODATION
OF THE POCKET

REGULATOR SOLENOID COIL

PRESSURE OF
FUEL NUCLEUS
PLUNGER

3. Start the engine *. Measure the fuel pressure

with the engine idling and the pressure
regulator vacuum hose disconnected from the
regulator and throttled.
The pressure should be: CHANNEL
FUEL
D14A3, D14A4, D15Z4 and D15Z5 engines: 226 -
275 kPa (2.3 - 2.8 kgf./cm2, 33 - 40 psi) D16Y4 TORICA
and D16Y9 engines:
275 - 324 kPa (2.7 - 3.2 kgf./cm2, 38 - 46 psi) LOVE-
TIGUA-
Four. Reconnect the vacuum hose to the fuel DOR
pressure regulator.
INJECTOR
The pressure should be:
D14A3, D14A4, D15Z4 and D15Z5 engines: STAMP
162 - 211 kPa (1.65 - 2.15 kgf./cm2, 23 - 31
psi)
D16Y4 and D16Y9 engines:
211 - 260 kPa (2 - 2.5 kgf./cm2, 28 - 36 psi)
*: If the engine does not start, switch the ignition
(II) on and wait for two seconds. Turn it off
later and start over. Record the pressure MANIFOLD
reading of the OF ADMISSION
fuel.
• If the fuel pressure is not specified, check the
pump first (see page 11-A-77). If the pump is
OK, check the following:

- If the pressure is higher than specified,

check:
* Strangled or clogged fuel return hose or line.
(cont.)
* Defective pressure regulator (see page 11-
A-75.
* Leak in fuel line.
11-A-71
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

Fuel Injectors (cont.)

Test If the engine cannot be started:

NOTE: Check the following items before testing: speed, 1. Disconnect the injector connector and measure
advance, and CO percent from idle. the resistance between the two injector
terminals.

If the engine starts: The resistance should be: 10 - 13 ½

1. With the engine idling, individually disconnect

the connectors from each injector and inspect
the idle speed change.

• If the decrease in speed is almost the same

for each cylinder, the injectors operate
normally.
• If the idle speed or quality is the same when
disconnecting a particular injector, replace the
injector and recheck.

2. With the engine idling, check each injector for a

clicking sound using a stethoscope.

INJECTOR
FUEL

• If the resistance is not specified, replace

the injector.
• If resistance is as specified, check fuel
pressure (see page 11-A-71).

• If any of the injectors do not make the typical - If the pressure is as specified,
clicking sound, check again check:
thesound after changing the injector. If the • If there is a short circuit, wire break or poor
- clicking sound is still not apparent, connection in the YEL / BLK wire, between
check the following: the main relay PGM-FI and the connector.
• If there is a short circuit, wire break or poor
connection in the YEL / BLK wire, between • If the connector is open or corroded.
the main relay PGM-FI and the connector. • If there is a short, wire break or poor
connection in the RED / BLK wire
• If the connector is open or corroded. If between the connector and the fuel
• there is a short, wire break or poor injector.
connection in the RED / BLK wire between • If there is a short, wire break or poor
the connector and the fuel injector. connection at the injector and ECM.

• If there is a short, wire break or poor

connection at the injector and ECM. If everything is okay, check the ECM (see page 11-
A-25).
If everything is ok, check the ECM (see page 11-
A-25) and the main relay PGM-FI (see page 11-
A-78).

11-A-72
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Change

CAUTION: Do not smoke while working on the fuel system. Avoid direct contact of flames in the
work area.

1. Relieve fuel pressure (page 11-A-70).

2. Disconnect the connectors from the injectors (D14A3, D14A4, D15Z4 and D15Z5 engines: Remove the air
filter).

3. Disconnect the vacuum hoses and fuel return hose from the pressure regulator
fuel.

NOTE: Place a cloth over the cuffs before disconnecting them. Loosen the

Four. fuel channel retaining nuts.

5. Disconnect the fuel channel.

6. Remove the injectors from the intake manifold.

REGULATOR
PRESSURE OF
COMBUSTBILE

CHANNEL
FUEL
REGULATOR
PRESSURE OF
COMBUSTBILE CHANNEL
OF THE
TORICA COMBUS-
Change TIBLE

SHOCK ABSORBER
Change TORICA
Change

SHOCK ABSORBER
STAMP Change
Change

STAMP
Change

7. Insert the new seals into the injectors.

8. Coat the o-rings with clean oil and install them on the injectors.

9. Insert the injectors into the fuel channel first.

10. Coat the new seals with clean engine oil and insert them into the intake
manifold.
(cont.)

11-A-73
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

Fuel Injectors (cont.)

11. Install the injectors and fuel channel assembly into the intake manifold.
CAUTION: To avoid damaging the o-rings, install the injectors first in the fuel channel and then in
the intake manifold.

12. Install and tighten the retainer nuts.

13. Connect the vacuum hoses and fuel return hose to the pressure regulator.

14. Install the fuel injector connectors (D14A3, D14A4, D15Z4 and D15Z5 engines: install air filter).

15. Turn on the ignition (II) but do not activate the starter motor. When the pump has operated for
approximately two seconds, the fuel pressure in the line will increase. Repeat this step two or three times
and check for fuel leaks.

11-A-74
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel pressure regulator

Description Test

The fuel pressure regulator maintains a constant CAUTION: Do not smoke while working on the fuel
pressure across the fuel injectors. When the system. Avoid direct contact of flames in the work
difference between the fuel pressure and that of the area.
manifold exceeds 250 kPa (2.55 kgf./cm2., 36 psi)
(D16Y4 and D16Y9 engines: 294 kPa, 3 kgf / cm2, 43 1. Install the special tool in the fuel channel service
psi), the diaphragm will be moves up and the excess entrance (see
fuel returns to the tank through the return line. or page 11-A-70).

CLOSED: CLAMP
METER OF
PRESSURE OF
FUEL
TO THE COLLECTOR
OF ADMISSION

DIAPHRAGM

REGULATOR
ENTRANCE
PRESSURE OF
OF THE COM-
FUEL
BUSTIBLE

The pressure should be:

OPENED:
D14A3, D14A4, D15Z4 and D15Z5 engines: 226 -
275 kPa (2.3 - 2.8 kgf./cm2, 33 - 40 psi) D16Y4
and D16Y9 engines:
TO THE COLLECTOR
275 - 324 kPa (2.7- 3.2 kgf./cm2, 38 - 46 psi)
OF ADMISSION
(with the vacuum hose of the pressure
regulator disconnected and
strangled).
DIAPHRAGM
2. Reconnect the vacuum hose to the fuel
pressure regulator.

3. Check that the fuel pressure increases when

the engine is switched off again.
mpressure regulator vacuum leg.

• If the fuel pressure does not increase,

change the pressure regulator.
ENTRANCE
OF THE COM-
BUSTIBLE

RETURN OF
FUEL
(cont.)

11-A-75
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

Fuel Pressure Regulator Fi fuel filter

(cont.)
ACmbio
Change
AT ENCION:
CAUTION: Do not smoke while working on the fuel • Do not smoke while working on the fuel
system. Avoid contact of flames in the work area. system.
• When changing the fuel filter, be sure to
maintain a safe distance between the battery
1. Place a rag under the pressure regulator and terminals and the tools.
relieve fuel pressure (see page 11-A-70).

Thefuel filter should always be changed

2. Disconnect the vacuum hose and the fuel return pressure drops below specification (D14A3, D14A4,
hose. D15Z4, D15Z5 engines: 226 - 275 kPa (2.3 - 2.8 kgf / cm2,
33 - 40 psi); D16Y4, D16Y9 engines: 275 - 324 kPa (2.7 -
3. Remove the two 6mm retainer screws. 3.2 kgf / cm2, 38
- 46 psi) with the regulator vacuum hose disconnected
REGULATOR and throttled), after verifying that the pump and
PRESSURE OF pressure regulator are working properly.
FUEL

1. Disconnect the negative cable from the

negative battery terminal.

2. Place a rag under and around the filter.

3. Relieve fuel pressure (see page 11-A-70).

Four. Remove the special screw and the filter feed

tube while holding it with the other tool, as
shown in the illustration.

5. Remove the clamps and the fuel filter.

6. When reinstalling, use new washers as indicated.

TORICA
Change
NOTE: Clean the gasket of the high pressure
hoses thoroughly before reconnecting them.

SCREW
SPECIAL

WASHER
Change

NOTE:
• Change the O-ring.
• When mounting the pressure regulator,
apply clean engine oil to the o-ring and install
it in its correct location, preventing damage
to the o-ring.

11-A-76
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel pump
Test Change
CAUTION: Do not smoke while working on the fuel ATTENTION: Do not smoke I am working
system. Avoid direct contact of flames in the work while in the fuel system . Avoid contact
area. direct from flames in the work area.
If you suspect a problem with the fuel pump, check
that the fuel pump rotates. When activated, you may 1. Remove the cushion from the seat (see section 20)
hear a noise from the fuel inlet hatch when removing
the cover. The pump should operate for two seconds
when the ignition is first made. If the pump does not 2. Remove the access panel from the floor.
make any noise, check the following:
3. Disconnect the 2P connector from the fuel
tank.

1. Remove the cushion from the seat (see section Four. Remove the fuel pump mounting nuts.
20)
2. Remove the access panel from the floor. 5. Remove the pump from the fuel tank.
3. Disconnect the 2P connector from the fuel
tank.
6. Install the parts in the reverse order of
removal.
CAUTION: Check that the contact is removed
before disconnecting the cables. ACCESS PANEL

3. Connect the terminals numbers 4 and 5 of the 7P

connector of the main relay PGM-FI using a
jumper.
CONNECTOR 7P FROM
MAIN RELAY
PGM-FI

IG1 (YEL / GRN).

PUMP KG, KS, KE, KR models: YEL /
FUEL RED
(YEL / GTN)
BRIDGE TERMINALS CABLE SIDE

FEMALE

NOTE: The inertia switch must be reset by pressing

the knob (model KG, KS, KE, KR).
5. Check that there is battery voltage available BASE
between terminal no. 1 of the pump connector Change
and ground when the contact (II) is turned on.
2P CONNECTOR
PUMP
COMBSUTIBLE

TERMINALS CABLE SIDE

FEMALE

• If there is battery voltage, check the pump

ground. If the batter is okay, change the pump.

• If there is no voltage, check the wiring (see

p. 11-A-79).

11-A-77
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

Inertia switch (KG, KE, KS and KR models)

Description Switch test

The inertia switch is a safety device that automatically NOTE: If the vehicle starts and continues to run, the
cuts off the power supply. main relay PGM-FI is working properly.
fuel in the event of a collision or sudden impact.
The switch is located under the glove compartment. 1. Remove the main relay PGM-FI.
After an impact, the switch must be reset by pressing
the knob before restarting the engine. 2. Connect the positive battery terminal to terminal #.
2 and the negative terminal of the battery to
terminal # 1 of the main relay PGM-FI. Then
SMOCK check that there is continuity between terminals
numbers 5 and 4 of the main relay PGM-FI.

I SEND • If there is continuity, go to step 3.

DOCK
• If there is no continuity, replace the main
relay PGM-FI and recheck.
TERMINALS

BALL OF
STEEL

CONTACT
MOBILE

MAGNET TO ENC. TO
BAT.

TO THE
Main relay PGM-FI TO GROUND
TERMINALS
A13 AND A12 DEL
AT INTERR.
ENGINE OF CONNECTOR
Description START FROM ECM (IGP)
The main relay PGM-FI actually contains two individual
relays. This relay is located on the left side of the dash. TO THE TERMINAL
One of the relays is activated when the contact is A4 (FLR) DEL TO THE PUMP OF
made and is the one that supplies battery voltage to CONNECTOR FUEL
the ECM, power to the fuel injectors and power to the FROM THE ECM

second relay. The second relay is activated for two 3. Connect the positive terminal of the battery to
seconds when the ignition is turned on, when the terminal # 5 and the negative terminal of the
engine is running, to supply power to the fuel pump. battery to terminal # 3 of the main relay PGM-FI.
Then check that there is continuity between
terminals numbers 7 and 6 of the main relay
PGM-FI.
MAIN RELAY
PGM-FI • If there is continuity, go to Step 4. If there
• is no continuity, replace the main relay
PGM-FI and recheck.
VOLTAGE OF
BATTERY

INTERR. OF
SWITCHED ON
Four. Connect the positive terminal of the battery to
SIGNAL M.
START
terminal # 6 and the negative terminal of the
battery to terminal # 1 of the main relay PGM-FI.
Then check that there is continuity between
terminals numbers 5 and 4 of the main relay
NDE PGM-FI.

• If there is continuity, the main relay PGM-FI is

INJECTOR
FUEL

PUMP OK.
FUEL • If there is no continuity, replace the main
relay PGM-FI and recheck.

11-A-78
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Main relay PGM-FI

Troubleshooting CONNECTOR MAIN RELAY
PGM-FI
- The motor does not start. NOTE: The inertial switch must be reset by
- Inspection of the main relay pressing the knob
PGM-FI and the wiring. (KG, KE, KS and KR models)

Check for open in the cable

(GND line - ground-):
CABLE SIDE E OF THE
1. Remove the contact.
FEMALE TERMINALS
2. Disconnect the main relay
PGM-FI connector.
3. Check the continuity between
terminal no. 3 of the 7P
connector of the main relay PGM-
FI and ground

BATTERY

DO NOT
Repair open in wire between main
Is there continuity? relay PGM-FI and G101

YES

Check for open or short in the

cable (battery line):
Measure the voltage between terminal
no. 7 of the 7P connector of the main
relay PGM-FI and ground

- Replace the FI E / M fuse (15A),

in the fuse and relay box under
DO NOT
the hood.
Is there battery voltage? - Repair open or short in wire
between main relay PGM-FI and FI
E / M fuse (15A)
YES

Check for open or short in cable COOL SWITCH CONNECTOR

(IG1 line): (KG, KE, KS and KR models)
1. Put the contact (II).
2. Measure the voltage between
terminal no. 5 of the 7P connector of Check the inertia switch: SWITCH
the main relay PGM-FI and ground INERTIA
1. Remove the contact.
2. Disconnect the 3P connector from (YEL / RED)
the inertia switch.
3. Put the contact (II)
4. Measure the voltage between
terminals 1 and 3 of the inertia
DO NOT switch 3P connector.
Is there battery voltage?
- Change the FUEL PUMP fuse
YES NO (FUEL PUMP) NO. 13
Is there battery voltage? (15A), in the fuse box and
relays under the dash.
- Repair open or short in wire
Check for open or short in cable YES between main relay PGM-FI and
(STS line - starter motor): FUEL PUMP fuse No. 13 (15A). (KG,
Replace the inertia switch
KE, KS and KR models: between the
1. Put the ignition in the START inertia switch and the FUEL PUMP
position (III). fuse # 13) (15A).
NOTE: M / T in neutral; A / T in N
or P positions.
2. Measure the voltage between - Repair open in the wire between
terminal no. 2 of the 7P connector of the main relay PGM-FI and the
the main relay PGM-FI and ground inertia switch
(KG, KE, KS and KR models)

(On page 11-A-80)

(cont.)

11-A-79
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel supply system

PGM-FI Main Relay (cont.)

(From p. 11-A-79)

- Change the fuse no. 31 starter

signal (7.5A), in the fuse and relay
box under the dash.
DO NOT

Is there battery voltage? - Repair open or short in the

cable between main relay PGM-FI
YES and starter motor signal fuse (7.5A)

MAIN RELAY CONNECTOR PGM-FI

Check for open in cable (FLR
line):
1. Remove the contact.
CONNECTOR A OF ECM (26P)
2. Disconnect connector A (26P)
from the ECM.
3. Check the continuity between
terminal no. 1 of the 7P
connector of the PGM-FI main
relay and terminal A4 of the ECM
connector
CABLE SIDE OF FEMALE
TERMINALS

DO NOT Repair open in wire between

Is there continuity? ECM (A4) and main relay PGM-
FI
YES

Check for open in the cables

(lines IGP1, IGP2):
1. Reconnect ECM connector A (26P).

2. Reconnect the main relay PGM-FI

connector.
3. Put the contact (II).
4. Measure the voltage between
terminals A12, A13, and A15.

- Repair open in wire between ECM

DO NOT
(A12, A13) and main relay PGM-FI.
Is there battery voltage?
- Change the main relay PGM-FI
YES

Check for open on ECM:

1. Remove the contact.

2. Measure the voltage between
terminals A4 and A15 of the ECM
connector at the first contact (II) for 2
seconds.

Replace the ECM with a good one and

DO NOT
recheck (see page 11-A-15). If there is
Is it 1 V or less? voltage now, replace the original ECM

YES

Check main relay PGM-FI (see page 11-

A-78)

11-A-80
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Fuel tank
Change
CAUTION: Do not smoke while working on the fuel system. Avoid contact of flames in the work area.

1. Relieve fuel pressure (see page 11-A-70). Remove the seat

2. cushion (see section 20). Pull the access panel off the ground.
3.
Four. Disconnect the 2P and 3P connectors.
5. Disconnect the hose and quick connect joints (see page 11-A-67). Raise the vehicle and
6. support it on safety stands.
7. Remove the drain screw and drain the fuel into an approved container.
8. Remove the EVAP two-way valve cap and gasket protector from the fuel hose. Disconnect the hoses (see
9. page 11-A-67).
WATCH OUT:
• When disconnecting the sleeves, remove the clamps and move the sleeves as you remove them to prevent
damage.
• Clean the gasket of the high pressure hoses thoroughly before reconnecting them.

10. Place a jack or other type of support under the tank.

eleven. Remove the nuts from the clamps and let the clamps free. Remove the fuel tank.
9.
NOTE: The tank may stick to the primer applied to your frame. To disassemble it, carefully remove it.

10. Install a new washer on the drain screw, and then install the parts in the reverse order of removal.

BASE JOINT
Change

BASE JOINT
Change

WASHER
Change

DRAIN SCREW
PUMP
FUEL

CLAMPS
DEPOSIT OF
COVER OF FUEL
TWO VALVE
VIAS EVAP

FRONT HOSE GASKET GUARD

FUEL
11-A-81
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Intake air system

Troubleshooting guide
NOTE: Each line of the graph lists the subsystems that could be the cause of the symptom, lined up in the order
they should be inspected, starting with 1. Look for the symptom in the column
left, read to the more cause s next and then look in the nearest system 2, and so on
successively.

PAGE SUBSYSTEM AIR FILTER AND DUCT CABLE BODY OF THE

BUTTERFLY BUTTERFLY
INTAKE AIR

SYMPTOM

IN COLD RAPID IDLE OUT OF

SPECIFICATIONS

IN HOT FAST IDLE TOO HIGH

POWER LOSS

11-A-82
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

System description
The system supplies air whenever the engine needs it. It consists of an intake air pipe, an air filter (ACL), an
intake air duct, the throttle body (TB), the idle air control valve (IAC) and the intake manifold. A resonator in the
intake air tube optimizes the silencing action as air enters the system.

RELAY
MAIN PGM-FI

VARIOUS
SENSORS

FILTER
OF THE
AIR
AIR TUBE
REFRIGERANT
ADMISSION
MOTOR
RESONATOR
VALVE
IAC
BUTTERFLY BODY

COLLECTOR
ADMISSION

D16Y4 and D16Y9 engines:

RELAY
MAIN PGM-FI

VARIOUS
SENSORS

VALVE
IAC
COLLECTOR RESONATOR
IAC VALVE
ADMISSION

TUBE
AIR FROM
CONDUIT ADMISSION
BODY FILTER
FROM AIR
OF THE
OF THE ADMISSION
BUTTERFLY AIR

11-A-83
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Intake air system

Air filter (ACL) Butterfly cable

Changing the air filter Inspection and adjustment

NOTE: Do not blow the air filter with compressed air 1. Start the engine. Keep it at 3,000 rpm. (min-1) with
(except for KR, KY, KW, KT and KV models). no load (M / T in neutral; A / T in N or P positions)
until the radiator fan starts. Keep it idling
afterwards.
D14A3, D14A4, D15Z4 and D15Z5 engines:
COVER OF
ACCOMMODATION 2. Check that the throttle cable operates smoothly
FILTER (not stuck or kinked). Repair it if necessary.

3. Check the cable free play at the throttle joint.

The deflection of the cable should be 10 - 12
mm.
KG, KS and KE models:
Normal conditions:
Change every 40,000 kms. or 2 D14A3, D14A4, D15Z4 and D15Z5 engines:
years (whichever occurs first).

Extreme conditions: Apply the NUT NUT

normal program except when ADJUSTMENT
driving on roads
dusty roads that must be
changed every 20,000 kms. or 1
year (whichever comes first)
Deflection
KU model: Change every
20,000 kms. or 1 year (whichever
comes first). KR, KY, KW, KT and
KV models: Clean every 10,000
km. Change every 20,000 kms.
or 1 year (whichever comes first)

FILTER MEDIUM
FROM AIR CABLE
(ALC)

D16Y4 and D16Y9 engines:

KQ model: D16Y4 and D16Y9 engines:
Under normal conditions: change every
40,000 kms. or 2 years, whichever comes
first. In extreme driving conditions apply MEDIUM NUT
the program for normal conditions, except CABLE
for dusty roads: change every 20,000 km. or
COVER OF 1 year, whichever comes first. KV model:
ACCOMMODATION Clean every 10,000 km. Change every
FILTER 20,000 kms. or 1 year, whichever occurs
first.

NUT
ADJUSTMENT
Deflection

Four. If deflection is not specified, loosen nut and turn

adjusting nut until deflection is specified. Then
retighten the nut.

5. With the cable properly adjusted, check the

throttle valve to verify that it opens fully when the
accelerator pedal is depressed. Also check to verify
ACCOMMODATION
that it returns to idle position when the accelerator
FILTER
AIR pedal is released.

11-A-84
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Installation Four. Install the nut on the cable bracket. Adjust

the adjusting nut so that its free play is 0
1. Fully open the throttle valve and install the cable mm.
into the link. Install the cable housing on the
cable bracket. 5. Remove the cable sleeve from the throttle
bracket and retighten the locknut.
adjustment. Tighten the nut.
D14A3, D14A4, D15Z4 and D15Z5 engines:

There should not be

MEDIUM
slack
CABLE

MEDIUM
JOINT
CABLE
OF THE
BUTTERFLY

NUT NUT
ADJUSTMENT

INTERNAL CABLE

NUT NUT
ADJUSTMENT

D16Y4 and D16Y9 engines:

MEDIUM
CABLE
NUT

NUT
ADJUSTMENT

INTERNAL CABLE
JOINT
OF THE
BUTTERFLY

2. Start the engine. Keep it at

3,000 rpm. (min-1) with no load (M / T in neutral;
A / T in N or P positions) until the radiator fan
starts. Keep it idling afterwards.

3, Fasten the cable sheath removing the slack.

11-A-85
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Intake air system

Throttle body
Description Inspection

The throttle bodies are covered by a single lower CAUTION: Do not adjust the butterfly stop screw. It
suction body. D14A3, D14A4, D15Z4 and D15Z5 is adjusted at the factory.
engines) and side suction (D16Y4 and D16Y9 engines).
1. Start the engine. Keep it at
The lower section of the throttle body receives heat 3,000 rom (min-1) with no load (M / T in
from the coolant from the cylinder head. The idle neutral; A / T in N or P positions) until
adjusting screw, which increases and decreases the the radiator fan starts. Keep it idling afterwards.
transmitted air, and the Evaporative Emission Control
(EVAP) orifice are located at the top of the throttle 2. Disconnect the vacuum hose (to the EVAP
body. control filter) from the throttle body; connect a
vacuum gauge to the throttle body.

SENSOR D14A3, D14A4, D15Z4 and D15Z5 engines:

POSITION OF THE B OMBA / ME-
BUTTERFLY (TP) DIDOR OF
VACUUM

D16Y4 and D16Y9 engines:

SET SCREW
OF THE SLOW

PUMP / METER
OF EMPTINESS

3. Warm the engine to idle temperature and check

that the gauge does not indicate vacuum.
• If there is vacuum, check the throttle cable
(see page 11-A-84). Check that the gauge
Four. indicates empty when the throttle opens
slightly from idle.

• If the gauge does not indicate vacuum, check

the throttle body inlet. If it is clogged, clean it
with carburetor cleaner.

5. Stop the engine and check that the throttle cable

operates smoothly (not kinked or stuck).

- Wear or excessive play of the throttle

valve shaft.
- Throttle lever twisted or stuck in fully open
position.
- Clearance between stop screw and throttle lever

11-A-86 in fully closed position.

 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

D14A3, D14A4, D15Z4 and D15Z5 engines:

There should not be

ARTICULATION OF slack
THE BUTTERFLY

BUTTERFLY STOP SCREW

(not adjustable)

D16Y4 and D16Y9 engines:

ARTICULATION OF
THE BUTTERFLY

There should be no slack

BUTTERFLY STOP SCREW

(not adjustable)

Replace the throttle body if the throttle valve shaft play is bent or stuck. throttle is excessive or if the shaft

(cont.)

11-A-87
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Intake air system

Throttle body (cont .)

Disassembly

D14A3, D14A4, D15Z4 and D15Z5 engines:

IAT SENSOR

FILTER
AIR
MAP SENSOR

C CABLE ONTROL OF THE

BUTTERFLY A / T

TP SENSOR
COUNCIL
Change
VALVE
IAC

CABLE
BUTTERFLY

D14A3, D14A4, D15Z4 and

COUNCIL
TP SENSOR MAP SENSOR
Change

CABLE
BUTTERFLY
CONTROL CABLE
OF THE BUTTERFLY

VALVE
IAC

WATCH OUT:
• The butterfly stop screw is not adjustable.
• After reinstalling, adjust the throttle cable (see page 11-A-84) and A / T throttle control cable (see
section 14).
• The TP sensor is not removable.

11-A-88
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Disassembly

D14A3, D14A4, D15Z4 and D15Z5 engines: SCREW

ADJUSTING THE
SLOW MOTION

TORICA

TORICA
Change

MAP SENSOR IAC VALVE

Location of
breakdowns:
P. 11-A-31
TORICA
Change

TP SENSOR

D16Y4 and D16Y9 engines:

TORICA
Change MAP SENSOR
Troubleshooting: p. 11-A-31

TORICA

SCREW
ADJUSTING THE
TP SENSOR
SLOW MOTION

TORICA
Change

IAC VALVE

11-A-89
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Emission control system

System Troubleshooting Guide

NOTE: Each line of the graph lists the subsystems that could be the cause of the symptom, lined up in the order
they should be inspected, starting with 1. Look for the symptom in the column
left, read to the nearest cause and then look for is in the closest system 2, and so on
successively.

PAGE SUBSYSTEM CATALYST SYSTEM OF CONTROLS

THREE WAYS VENTILATION OF THE EMISSIONS
POSITIVE PORTFOLIO STEAM

SYMPTOM

BRUSH IDLE

DRAFT
FREQUENT AFTER THE
HEATING

EMISSIONS TEST FAILED

UNDER
PERFORMANCE
WASTE OF
POWER

*: Model with TWC

11-A-90
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

System description Three-way catalyst (TWC)

(model with TWC)
The emission control system includes a catalyst (TWC)
*, a positive crankcase ventilation system (PVC) and Description
the emission control system (EVAP) *. The three-way catalyst (TWC) is used to convert
hydrocarbons (HC), carbon monoxide (CO) and
nitrogen oxides (NOx) in the exhaust gas, into carbon
*: Models with TWC dioxide (CO2), dinitrogen (N2) and water vapor.
Exhaust pipe emissions
Inspection
Inspection If you suspect that the exhaust system return
pressure is excessive, remove the TWC from the
CAUTION: Do not smoke while working on the fuel vehicle and visually check the catalyst for noise,
system. Avoid contact of flames in the work area. cracks, or meltdown. Replace the TWC if any of the
visible areas are damaged or obstructed.

1. Connect a tachometer.
Removal and installation
2. Start the engine. Keep it at 3,000 rpm (min-1) with (see section 9)
no load (M / T in neutral; A / T in N or P positions)
until the radiator starts. Keep it idling afterwards.
D15Z5 engine:

3. Check idle speed and adjust if necessary (see

page 11-A-63).

Four. Heat and calibrate the CO meter according to

the manufacturer's instructions. CATALYST
THREE-WAY
5. Check the idle CO with the headlights, heater fan,
rear window defogger, cooling fan, and air
conditioning turned off.

ACCOMMODATION

Specified CO Percentage:
For vehicles with TWC: 0.1% maximum.
For vehicles without TWC: 1 ± 1%.

• If the specified reading is not obtained:

For TWC models, see ECM troubleshooting
(page 11-A-25). On models without TWC, adjust D14A3, D14A4 AND D16Y4 ENGINES:
by turning the IMA adjusting screw.

SCREW ACCOMMODATION
ADJUSTMENT
TOP

IMA

CATALYST
PART THREE WAYS
FRONT OF
VEHICLE

- If the specified CO percent reading cannot be

obtained using this procedure, check the
condition of the engine.
11-A-91
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Emission control system

Positive Crankcase Ventilation (PCV) System

Description Inspection

The Positive Crankcase Ventilation (PCV) system is 1. Check the hoses and c PCV connections
designed to prevent the expansion of internal in case they are leaking or clogged.
circulation gases into the atmosphere. The PCV valve
contains a spring actuated plunger. When the engine 2. With the vehicle idling, check for a clicking sound
is started, the piston of the PCV valve rises in from the PCV valve when the sleeve between the
proportion to the vacuum in the intake manifold and valve and the intake manifold is slightly throttled
the gas is led directly to the intake manifold. with your fingers or pliers.

D14A3, D14A4, D15Z4 and D15Z5 engines: D14A3, D14A4, D15Z4 and D15Z5 engines:

SLEEVE Press lightly

BREATHING in this point

SLEEVE
BREATHING

SLEEVE
OF THE PCV

VALVE
OF THE PCV

SLEEVE
VALVE OF THE PCV
OF THE PCV

D16Y4 and D16Y9 engines:

SLEEVE D16Y4 and D16Y9 engines:

BREATHING
SLEEVE
OF THE PCV

Press
slightly in this
point

PCV SLEEVE

PCV VALVE

INTERNAL STEAM
FRESH AIR
PCV HOSE
PCV VALVE

• If the clicking sound is not appreciated, check

the valve insulation for damage. If okay, change
the PCV valve and recheck.

11-A-92
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Evaporative Emission Control (EVAP)

Description
Evaporative emission controls are designed to minimize the expansion of fuel vapor through the
atmosphere. The system is made up of the following elements:
TO. Evaporative Emission Control Canister (EVAP)
The EVAP control canister is used to temporarily store fuel vapor until it can be vented into the engine
and subsequently burned.
B. Steam purge control system
The EVAP canister is purged by circulating fresh air through the EVAP control canister and through the
inlet port of the throttle body. The purge vacuum is controlled by the EVAP purge control diaphragm
valve (D14A3 and D14A4 engines).

EVAP PURGE CONTROL SOLENOID VALVE AFTER ENGINE STARTING

• EVAP PURGE CONTROL SOLENOID VALVE OFF

ENGINE COOLANT TEMPERATURE GREATER THAN 75 ° C

C. Fuel tank vapor control system

When the vapor pressure in the tank is higher than the EVAP two-way valve set point, the valve opens
and regulates the flow of fuel vapor from the EVAP control canister.

D14A3, D14A4, D15Z4 and D15Z5 engines:

VALVE
SOLENOID (Engines OF SENSOR NO. 15
D15A3 and
OF CONTROL (7.5A) DEL
D14A4)
PURGE ALTERNATOR
EVAP

TRAP OF
FILLING THE
VALVE FUEL
EVAP OF
TWO WAYS

VARIOUS
SENSORS

VALVE DEPOSIT OF
EVAP OF FUEL
DEPOSIT
OF THE
FUEL

VALVE
DIAPHRAGM OF
CONTROL OF
EVAP PURGE

CONTAINER
OF CONTROL
EVAP

FRESH AIR

11-A-93
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Emission control system

D16Y4 and D16Y9 engines :

VALVE
EVAP OF VALVE
TWO WAYS CONTAINER OF
DIAPHRAGM OF
EVAP CONTROL
CONTROL OF
EVAP PURGE

EVAP VALVE
DEPOSIT
OF THE
FUEL
AIR
FRESH

DEPOSIT OF
FUEL

11-A-94
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Emission control ev aporatives (EVAP) VALVE

CONTROL DIAPHRAGM
EVAP PURGE
Troubleshooting (D14A3 and D14A4 Engines):

Inspection of evaporative
emission controls

PUMP AND VACUUM GAUGE

Check cold vacuum:
1. Disconnect the vacuum hose from
the EVAP purge control container
and connect a EVAP PURGE CONTROL SOLENOID VALVE 2P
vacuum gauge to the cuff. CONNECTOR
2. Start the engine and keep it
idling. Check the EVAP purge
NOTE: The motor temperature must control valve:
1. Remove the contact.
be below 75 ° C.
2. Disconnect the 2P connector from
the EVAP purge control solenoid
YES valve.
Is there a void? 3. Start the engine.
4. On the wiring side, measure the
DO NOT voltage between terminal numbers 1
and 2 of the EVAP purge control
solenoid valve 2P connector.
CABLE SIDE OF FEMALE
TERMINALS

YES Inspect the vacuum hose circuit. If ok,

Is there battery voltage? replace EVAP control solenoid valve

DO NOT

Check for open in cable (IGP

line):
On the wiring side, measure the
voltage between terminal no. 1 of
valve 2P connector
EVAP purge control solenoid and
ground

DO NOT
Repair open in wire between EVAP purge
control solenoid valve and alternator
Is there battery voltage?
sensor fuse #. 15 (7.5A)
YES

Check for open in cable (PCS ECM CONNECTOR A (26P)

line):
1. Remove the contact.
2. Reconnect the EVAP purge
control solenoid valve 2P connector.

3. Put the contact (II).

4. Measure the voltage between
terminals A5 and A15 of the ECM
CABLE SIDE OF FEMALE
connector.
TERMINALS

DO NOT Repair open in wire between EVAP purge

Is there battery voltage? control solenoid valve and ECM (A5)

YES

Replace the ECM with a good one and

recheck (see page 11-A-15). If the
symptom or indication disappears,
replace the original ECM (cont.)
(On page 11-A-96)

11-A-95
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Emission control system

Evaporative Emission Control (EVAP) (co nt.)

(From to page 11-A-95)

Check vacuum hot:

1. Start the engine. Keep engine at 3,000
rpm (min-1) with no load (M / T in neutral;
A / T in
positions N or P) until the radiator fan
starts and then keep it at idle speed.

2. Check the vacuum in the vacuum hose

after starting the engine.

Check the EVAP purge control

DO NOT solenoid valve:
Is there a void? Disconnect the 2P connector from
the EVAP purge control solenoid
YES valve

YES Inspect the travel of the vacuum sleeve.

Is there a void?
If ok, replace EVAP purge control
solenoid valve
DO NOT

EVAP PURGE CONTROL SOLENOID VALVE 2P

CONNECTOR
Check for short in cable (PCS
line):
1. Remove the contact.
2. Disconnect connector A (26P)
from the ECM.
3. Check the continuity between
terminal no. 2 of purge control
solenoid valve 2P connector
CABLE SIDE
OF THE
TERMINALS
FEMALE

YES Repair short in the wire between

Is there continuity? the EVAP purge control solenoid
valve and the ECM (A5)
Check the EVAP control container: DO NOT

1. Reconnect the vacuum hose to the PRESSURE AND VACUUM GAUGE 0 -

EVAP purge control solenoid valve. Replace the ECM with a good one and
recheck (see page 11-A-15). If the 100 mmHg
2. Remove the fuel filler flap. symptom and indication disappear,
replace the original ECM
3. Connect a vacuum gauge to the
canister pump air hose.

4. Start the engine and increase the speed

to 3,500 rpm (min-1)

DO NOT
Is empty displayed on the meter
after 1 minute? Change EVAP control container

YES

See EVAP Two-Way Valve Test for

Complete Emission Controls

evaporatives operate correctly

AIR HOSE
PURGE

11-A-96
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Test (except D14A3 and D14A4 engines): 6. Increase engine speed to 3,500 rpm (min-1).

1. Remove the fuel filler flap. Start the engine and The meter should indicate empty after one
2. keep it idling. minute.
• If empty is displayed after one minute,
3. Disconnect the vacuum hose from the EVAP remove the meter; the test is over.
purge control diaphragm valve (on the EVAP
control vessel) and connect a vacuum hose to • If empty is not indicated, disconnect the gauge
the hose. and reinstall the fuel filler flap.

7. Remove the EVAP control filter and check if it is

DIAPHRAGM VALVE
EVAP PURGE CONTROL damaged or defective.
• If defective, replace EVAP control canister.

8. Stop the engine. Disconnect the upper

vacuum hose from the EVAP purge control
valve.
Connect a vacuum pump to reduce vacuum as
indicated and apply vacuum.

The vacuum must remain stable.

GAUGE AND VACUUM

PUMP

• If there is no vacuum, check the vacuum hose GAUGE AND VACUUM

for blocked, cracked, or disconnected vacuum. PUMP
Also check if the vacuum inlet is clogged.

Four. Disconnect the vacuum gauge and reconnect

the cuff.

5. Connect a vacuum gauge to the EVAP control

canister purge air hose.

PRESSURE AND VACUUM GAUGE 0 -

100 mmHg

• If vacuum drops, change EVAP control

container and recheck.
9. Restart the engine. Reconnect the upper
vacuum hose to the EVAP purge control
diaphragm valve.

The vacuum should drop to zero (lower vacuum

hose side).
• If the vacuum does not drop to zero,
change the EVAP control container and
recheck.

AIR HOSE
PURGE
(cont.)

11-A-97
 INDEX INDEX INDEX
GENERAL HANDBOOK SECTION

Emission control system

Evaporative Emission Controls (EVAP) (cont.)

Two-way valve test (EVAP)
1. Remove the fuel filler flap. Remove the vapor
2. line from the fuel tank two-way valve and
connect to
the vacuum gauge T-joint and to the pump as
shown.

COUNCIL

3. Apply vacuum slowly and continuously while

monitoring the meter.
The vacuum should momentarily stabilize at 0.7 - 2
kPa (5 - 15 mmHg).
• If the vacuum stabilizes (valve opens) below 0.7
kPa (5 mmHg) or above 2 kPa (15 mmHg), install a
new valve and recheck.

Four. Move the vacuum hose of the pressure joint pump

and move the hose from the vacuum side to the high
pressure side as shown.

SIDE OF
PRESSURE

5. Slowly pressurize the steam line while monitoring

the meter.
The pressure should momentarily stabilize at
1.3 - 4.7 kPa (10 - 35 mmHg).
• If the pressure stabilizes (valve opens) at 1.3 -
4.7 kPa (10 - 35 mmHg), the valve is OK.

• If the pressure stabilizes below 1.3 kPa (10

mmHg) or above 4.7 kPa (35 mmHg), install a
new valve and check again.

11-A-98