Page 1 of 417

ELANTRA TOURING(FD) > 2009 > G 2.0 DOHC > Fuel System

Fuel System > General Information > Specifications

Specifications
Fuel Delivery System

Items Specification
Fuel Tank Capacity 53lit. (14.0 U.S.gal., 56.0 U.S.qt., 46.6 Imp.qt.)
Fuel Filter Type Paper type
Regulated 338 ~ 348kpa
Fuel Pressure Regulator
Fuel Pressure (3.45 ~ 3.55kgf/cm², 49.0 ~ 50.5psi)
Type Electrical, in-tank type
Fuel Pump
Driven by Electric motor
Fuel Return System Type Returnless

Sensors
Manifold Absolute Pressure Ssensor (MAPS)
▷ Type: Piezo-resistive pressure sensor type
▷ Specification

Pressure (kPa) Output Voltage (V)

20.0 0.79

cardiagn.com
46.7 1.84
101.32 4.0

Intake Air Temperature Sensor (IATS)

▷ Type: Thermistor type
▷ Specification

Temperature [°C(°F)] Resistance (kΩ)

-40(-40) 40.93 ~ 48.35
-30(-22) 23.43 ~ 27.34
-20(-4) 13.89 ~ 16.03
-10(14) 8.50 ~ 9.71
0(32) 5.38 ~ 6.09
10(50) 3.48 ~ 3.90
20(68) 2.31 ~ 2.57
25(77) 1.90 ~ 2.10
30(86) 1.56 ~ 1.74
40(104) 1.08 ~ 1.21
60(140) 0.54 ~ 0.62
80(176) 0.29 ~ 0.34

Engine Coolant Temperature Sensor (ECTS)

▷ Type: Thermistor type
▷ Specification

Temperature [°C(°F)] Resistance (kΩ)

-40(-40) 48.14
-20(-4) 14.13 ~ 16.83
0(32) 5.79
20(68) 2.31 ~ 2.59

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 2 of 417

40(104) 1.15
60(140) 0.59
80(176) 0.32

Throttle Position Sensor (TPS)

▷ Type: Variable resistor type
▷ Specification

Throttle Angle Output Voltage (V)

C.T 0.25 ~ 0.9
W.O.T Min. 4.0V

Items Specification
Sensor Resistance (kΩ) 1.6 ~ 2.4 (20°C)

Heated Oxygen Sensor (HO2S)

▷ Type: Zirconia (ZrO2) type
▷ Specification

A/F Ratio (λ) Output Voltage (V)

Rich 0.6 ~ 1.0

cardiagn.com
Lean 0 ~ 0.4

Item Specification
Heater Resistance (Ω) Approx. 9.0 (20°C)

Camshaft Position Sensor (CMPS)

▷ Type: Hall effect type
Crankshaft Position Sensor (CKPS)
▷ Type: Hall effect type
Knock Sensor (KS)
▷ Type: Piezo-electricity type
▷ Specification

Item Specification
Capacitance (pF) 950 ~ 1,350
Resistance(MΩ) 4.87

CVVT Oil Temperature Sensor (OTS)

▷ Type: Thermistor type
▷ Specification

Temperature [°C(°F)] Resistance (kΩ)

-40(-40) 52.15
-20(-4) 16.52
0(32) 6.0
20(68) 2.45
40(104) 1.11
60(140) 0.54
80(176) 0.29

Fuel Tank Pressure Sensor (FTPS)

▷ Type: Piezo-Resistive Pressure Sensor
▷ Specification

Pressure (kPa) Output Voltage (V)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 3 of 417

-6.67 0.5
0 2.5
+6.67 4.5

Actuators
Injector
▷ Number: 4
▷ Specification

Item Specification
Coil Resistance (Ω) 13.8 ~ 15.2 [20°C (68°F)]

Idle Speed Control Actuator (ISCA)

▷ Type: Double coil type
▷ Specification

Item Specification
Closing Coil Resistance
14.6 ~ 16.2 [20°C (68°F)]
(Ω)
Opening Coil Resistance
11.1 ~ 12.7 [20°C (68°F)]
(Ω)

cardiagn.com
Duty (%) Air Flow Rate (㎥/h)
15 0.8 ~ 1.8
35 6.3 ~ 10.3
70 35.5 ~ 45.0
96 49.0 ~ 59.0

Purge Control Solenoid Valve (PCSV)

▷ Specification

Item Specification
Coil Resistance (Ω) 14.0 ~ 18.0 [20°C (68°F)]

CVVT Oil Control Valve (OCV)

▷ Specification

Item Specification
Coil Resistance (Ω) 6.9 ~ 7.9 [20°C (68°F)]

Ignition Coil
▷ Type: Double ended type
▷ Specification

Item Specification
Primary Coil Resistance (Ω) 0.58Ω±10％ [20°C (68°F)]
Secondary Coil Resistance (kΩ) 8.8kΩ±15％ [20°C (68°F)]

Canister Close Valve (CCV)

▷ Specification

Item Specification
Coil Resistance (Ω) 15.5 ~ 18.5 [20°C (68°F)]

Service Standard
Items Specification

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 4 of 417

Ignition Timing BTDC 5° ± 10°

Neutral,N,P-range
A/CON OFF
D-range
Idle Speed 660 ± 100 rpm
Neutral,N,P-range
A/CON ON
D-range

Tightening Torques
Engine Control System

Item kgf.m N.m lb-ft

ECM installation bolt 1.0 ~ 1.2 9.8 ~ 11.8 7.2 ~ 8.7
Manifold absolute pressure sensor installation bolt 1.0 ~ 1.2 9.8 ~ 11.8 7.2 ~ 8.7
Engine coolant temperature sensor installation 2.0 ~ 4.0 19.6 ~ 39.2 14.5 ~ 28.9
Throttle position sensor installation screw 0.15 ~ 0.25 1.5 ~ 2.5 1.1 ~ 1.8
Crankshaft position sensor installation bolt 1.0 ~ 1.2 9.8 ~ 11.8 7.2 ~ 8.7
Camshaft position sensor installation bolt 1.0 ~ 1.2 9.8 ~ 11.8 7.2 ~ 8.7
Knock sensor installation bolt 1.7 ~ 2.7 16.7 ~ 26.4 12.3 ~ 19.5

cardiagn.com
Heated oxygen sensor (Bank 1 / Sensor 1) installation 4.0 ~ 5.0 39.2 ~ 49.1 28.9 ~ 36.2
Heated oxygen sensor (Bank 1 / Sensor 2) installation 4.0 ~ 5.0 39.2 ~ 49.1 28.9 ~ 36.2
CVVT oil temperature sensor installation 2.0~ 4.0 19.6 ~ 39.2 14.5 ~ 28.9
Idle speed control actuator installation bolt 1.0 ~ 1.2 9.8 ~ 11.8 7.2 ~ 8.7
Purge control solenoid valve bracket installation bolt 0.8 ~ 1.2 7.8 ~ 11.8 5.8 ~ 8.7
CVVT oil control valve installation bolt 1.0 ~ 1.2 9.8 ~ 11.8 7.2 ~ 8.7
Ignition coil installation bolt/nut 1.9 ~ 2.7 18.6 ~ 26.4 13.7 ~ 19.5
Throttle body installation nut 1.9 ~ 2.4 18.6 ~ 23.5 13.7 ~ 17.4

Fuel Delivery System

Item kgf.m N.m lb-ft

Fuel tank band installation nut 4.0 ~ 5.5 39.2 ~ 53.9 28.9 ~ 39.8
Fuel pump plate cover tightening 8.0 ~ 10.0 78.5 ~ 98.1 57.9 ~ 72.4
Delivery pipe installation bolt 1.9 ~ 2.4 18.6 ~ 23.5 13.7 ~ 17.4

Fuel System > General Information > Special Service Tools

Special Service Tools
Tool(Number and name) Illustration Application
09353-24100 Measuring the fuel line pressure
Fuel Pressure Gauge

09353-38000 Connection between the delivery pipe

Fuel Pressure Gauge Adapter and fuel feed line

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 5 of 417

09353-24000 Connection between Fuel Pressure

Fuel Pressure Gauge Connector Gauge (09353-24100) and Fuel Pressure
Gauge Adapter (09353-38000)

09310-2B200 Removeing and installation fuel pump

Fuel Pump Plate Cover Wrench plate cover

cardiagn.com
Fuel System > General Information > Troubleshooting
Basic Troubleshooting
Basic Troubleshooting Guide

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 6 of 417

cardiagn.com
Customer Problem Analysis Sheet

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 7 of 417

cardiagn.com
Basic Inspection Procedure
Measuring Condition of Electronic Parts' Resistance
The measured resistance at high temperature after vehicle running may be high or low. So all resistance must be measured at
ambient temperature (20°C, 68°F), unless stated otherwise.

The measured resistance in except for ambient temperature (20°C, 68°F) is reference value.

Intermittent Problem Inspection Procedure

Sometimes the most difficult case in troubleshooting is when a problem symptom occurs but does not occur again during testing.
An example would be if a problem appears only when the vehicle is cold but has not appeared when warm. In this case, the
technician should thoroughly make out a "Customer Problem Analysis Sheet" and recreate (simulate) the environment and
condition which occurred when the vehicle was having the issue.
1. Clear Diagnostic Trouble Code (DTC).

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 8 of 417

2. Inspect connector connection, and check terminal for poor connections, loose wires, bent, broken or corroded pins, and then
verify that the connectors are always securely fastened.

3. Slightly shake the connector and wiring harness vertically and horizontally.
4. Repair or replace the component that has a problem.

cardiagn.com
5. Verify that the problem has disappeared with the road test.
● Simulating Vibration
1) Sensors and Actuators
: Slightly vibrate sensors, actuators or relays with finger.

Strong vibration may break sensors, actuators or relays

2) Connectors and Harness
: Lightly shake the connector and wiring harness vertically and then horizontally.
● Simulating Heat
1) Heat components suspected of causing the malfunction with a hair dryer or other heat source.

• DO NOT heat components to the point where they may be damaged.

• DO NOT heat the ECM directly.
● Simulating Water Sprinkling
1) Sprinkle water onto vehicle to simulate a rainy day or a high humidity condition.

DO NOT sprinkle water directly into the engine compartment or electronic components.
● Simulating Electrical Load
1) Turn on all electrical systems to simulate excessive electrical loads (Radios, fans, lights, rear window defogger, etc.).

Connector Inspection Procedure

1. Handling of Connector
A. Never pull on the wiring harness when disconnecting connectors.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 9 of 417

B. When removing the connector with a lock, press or pull locking lever.

cardiagn.com
C. Listen for a click when locking connectors. This sound indicates that they are securely locked.

D. When a tester is used to check for continuity, or to measure voltage, always insert tester probe from wire harness side.

E. Check waterproof connector terminals from the connector side. Waterproof connectors cannot be accessed from harness
side.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 10 of 417

• Use a fine wire to prevent damage to the terminal.

• Do not damage the terminal when inserting the tester lead.

2. Checking Point for Connector

A. While the connector is connected:
Hold the connector, check connecting condition and locking efficiency.
B. When the connector is disconnected:
Check missed terminal, crimped terminal or broken core wire by slightly pulling the wire harness.
Visually check for rust, contamination, deformation and bend.

cardiagn.com
C. Check terminal tightening condition:
Insert a spare male terminal into a female terminal, and then check terminal tightening conditions.
D. Pull lightly on individual wires to ensure that each wire is secured in the terminal.

3. Repair Method of Connector Terminal

A. Clean the contact points using air gun and/or shop rag.

Never use sand paper when polishing the contact points, otherwise the contact point may be damaged.
B. In case of abnormal contact pressure, replace the female terminal.

Wire Harness Inspection Procedure

1. Before removing the wire harness, check the wire harness position and crimping in order to restore it correctly.
2. Check whether the wire harness is twisted, pulled or loosened.
3. Check whether the temperature of the wire harness is abnormally high.
4. Check whether the wire harness is rotating, moving or vibrating against the sharp edge of a part.
5. Check the connection between the wire harness and any installed part.
6. If the covering of wire harness is damaged; secure, repair or replace the harness.

Electrical Circuit Inspection Procedure

● Check Open Circuit
1. Procedures for Open Circuit
A. Continuity Check
B. Voltage Check
If an open circuit occurs (as seen in [FIG. 1]), it can be found by performing Step 2 (Continuity Check Method) or Step 3
(Voltage Check Method) as shown below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 11 of 417

2. Continuity Check Method

When measuring for resistance, lightly shake the wire harness above and below or side to side.

Specification (Resistance)
1Ω or less → Normal Circuit
1MΩ or Higher → Open Circuit

A. Disconnect connectors (A), (C) and measure resistance between connector (A) and (C) as shown in [FIG. 2].
In [FIG.2.] the measured resistance of line 1 and 2 is higher than 1MΩ and below 1 Ω respectively. Specifically the open

cardiagn.com
circuit is line 1 (Line 2 is normal). To find exact break point, check sub line of line 1 as described in next step.

B. Disconnect connector (B), and measure for resistance between connector (C) and (B1) and between (B2) and (A) as
shown in [FIG. 3].
In this case the measured resistance between connector (C) and (B1) is higher than 1MΩ and the open circuit is between
terminal 1 of connector (C) and terminal 1 of connector (B1).

3. Voltage Check Method

A. With each connector still connected, measure the voltage between the chassis ground and terminal 1 of each connectors
(A), (B) and (C) as shown in [FIG. 4].
The measured voltage of each connector is 5V, 5V and 0V respectively. So the open circuit is between connector (C) and
(B).

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 12 of 417

● Check Short Circuit

1. Test Method for Short to Ground Circuit
A. Continuity Check with Chassis Ground
If short to ground circuit occurs as shown in [FIG. 5], the broken point can be found by performing Step 2 (Continuity Check
Method with Chassis Ground) as shown below.

cardiagn.com
2. Continuity Check Method (with Chassis Ground)

Lightly shake the wire harness above and below, or side to side when measuring the resistance.

Specification (Resistance)
1Ω or less → Short to Ground Circuit
1MΩ or Higher → Normal Circuit

A. Disconnect connectors (A), (C) and measure for resistance between connector (A) and Chassis Ground as shown in [FIG.
6].
The measured resistance of line 1 and 2 in this example is below 1 Ω and higher than 1MΩ respectively. Specifically the
short to ground circuit is line 1 (Line 2 is normal). To find exact broken point, check the sub line of line 1 as described in the
following step.

B. Disconnect connector (B), and measure the resistance between connector (A) and chassis ground, and between (B1) and
chassis ground as shown in [FIG. 7].
The measured resistance between connector (B1) and chassis ground is 1Ω or less. The short to ground circuit is between
terminal 1 of connector (C) and terminal 1 of connector (B1).

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 13 of 417

Symptom Troubleshooting Guide Chart

Main symptom Diagnostic procedure Also check for
Unable to start 1. Test the battery
(Engine does not turn 2. Test the starter
over) 3. Inhibitor switch (A/T) or clutch start switch (M/T)
Unable to start 1. Test the battery • DTC
(Incomplete 2. Check the fuel pressure • Low compression
combustion) 3. Check the ignition circuit • Intake air leaks
4. Troubleshooting the immobilizer system • Slipped or broken timing

cardiagn.com
(In case of immobilizer lamp flashing) belt
• Contaminated fuel
Difficult to start 1. Test the battery • DTC
2. Check the fuel pressure • Low compression
3. Check the ECT sensor and circuit (Check DTC) • Intake air leaks
4. Check the ignition circuit • Contaminated fuel
• Weak ignition spark
Poor idling 1. Check the fuel pressure
(Rough, unstable or 2. Check the Injector • DTC
incorrect Idle) 3. Check the long term fuel trim and short term fuel trim • Low compression
(Refer to CUSTOMER DATASTREAM) • Intake air leaks
4. Check the idle speed control circuit (Check DTC) • Contaminated fuel
5. Inspect and test the Throttle Body • Weak ignition spark
6. Check the ECT sensor and circuit (Check DTC)
Engine stall 1. Test the Battery
• DTC
2. Check the fuel pressure
• Intake air leaks
3. Check the idle speed control circuit (Check DTC)
• Contaminated fuel
4. Check the ignition circuit
• Weak ignition spark
5. Check the CKPS Circuit (Check DTC)
Poor driving 1. Check the fuel pressure
(Surge) 2. Inspect and test Throttle Body • DTC
3. Check the ignition circuit • Low compression
4. Check the ECT Sensor and Circuit (Check DTC) • Intake air leaks
5. Test the exhaust system for a possible restriction • Contaminated fuel
6. Check the long term fuel trim and short term fuel trim (Refer to • Weak ignition spark
CUSTOMER DATASTREAM)
Knocking 1. Check the fuel pressure
2. Inspect the engine coolant • DTC
3. Inspect the radiator and the electric cooling fan • Contaminated fuel
4. Check the spark plugs
Poor fuel economy 1. Check customer's driving habitsIs
· A/C on full time or the defroster mode on?
· Are tires at correct pressure? • DTC
· Is excessively heavy load being carried? • Low compression
· Is acceleration too much, too often?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 14 of 417

2. Check the fuel pressure • Intake air leaks

3. Check the injector • Contaminated fuel
4. Test the exhaust system for a possible restriction • Weak ignition spark
5. Check the ECT sensor and circuit
Hard to refuel 1. Test the canister close valve
(Overflow during 2. Inspect the fuel filler hose/pipe • Malfunctioning gas station
refueling) · Pinched, kinked or blocked? filling nozzle (If this
· Filler hose is torn problem occurs at a
3. Inspect the fuel tank vapor vent hose between the EVAP. canister specific gas station during
and air filter refueling)
4. Check the EVAP. canister

Fuel System > Engine Control System > Description and Operation
OBD-II review
1. Overview
The California Air Resources Board (CARB) began regulation of On Board Diagnostics (OBD) for vehicles sold in california
beginning with the 1988 model year. The first phase, OBD-I, required monitoring of the fuel metering system, Exhust Gas
Recirculation (EGR) system and additional emission related components. The Malfunction Indicator Lamp (MIL) was required to
light and alert the driver of the fault and the need for repair of the emission control system. Associated with the MIL was a fault

cardiagn.com
code or Diagnostic Trouble Code (DTC) idenfying the specific area of the fault.
The OBD system was proposed by CARB to improve air quality by identifying vehicle exceeding emission standards. Passage of
the Federal Clean Air Act Amendments in 1990 has also prompted the Environmental Protection Agency (EPA) to develop On
Board Diagnostic requirements. CARB OBD-II regulations were followed until 1999 when the federal regulations were used.
The OBD-II system meets government regulations by monitoring the emission control system. When a system or component
exceeds emission threshold or a component operates outside tolerance, a DTC will be stored and the MIL illuminated.
The diagnostic executive is a computer program in the Engine Control Module (ECM) or PowertrainControl Module (PCM) that
coordinates the OBD-II self-monitoring system. This program controls all the monitors and interactions, DTC and MIL operation,
freeze frame data and scan tool interface.
Freeze frame data describes stored engine conditions, such as state of the engine, state of fuel control, spark, RPM, load and
warm status at the point the first fault is detected. Previously stored conditions will be replaced only if a fuel or misfire fault is
detected. This data is accessible with the scan tool to assist in repairing the vehicle.
The center of the OBD-II system is a microprocessor called the Engine Control Module (ECM) or Powertrain Control Module
(PCM).
The ECM or PCM receives input from sensors and other electronic components (switches, relays, and others) based on
information received and programmed into its memory (keep alive random access memory, and others), the ECM or PCM
generates output signals to control various relays, solenoids and actuators.

2. Configuration of hardware and related terms

1) GST (Generic scan tool)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 15 of 417

cardiagn.com
2) MIL (Malfunction indication lamp) - MIL activity by transistor

The Malfunction Indicator Lamp (MIL) is connected between ECM or PCM-terminal Malfunction Indicator Lamp and battery supply
(open collector amplifier).
In most cars, the MIL will be installed in the instrument panel. The lamp amplifier can not be damaged by a short circuit.
Lamps with a power dissipation much greater than total dissipation of the MIL and lamp in the tester may cause a fault indication.
▷ At ignition ON and engine revolution (RPM)< MIN. RPM, the MIL is switched ON for an optical check by the driver.
3) MIL illumination
When the ECM or PCM detects a malfunction related emission during the first driving cycle, the DTC and engine data are stored
in the freeze frame memory. The MIL is illuminated only when the ECM or PCM detects the same malfunction related to the DTC
in two consecutive driving cycles.
4) MIL elimination
● Misfire and Fuel System Malfunctions:
For misfire or fuel system malfunctions, the MIL may be eliminated if the same fault does not reoccur during monitoring in three
subsequent sequential driving cycles in which conditions are similar to those under which the malfunction was first detected.
● All Other Malfunctions:
For all other faults, the MIL may be extinguished after three subsequent sequential driving cycles during which the monitoring
system responsible for illuminating the MIL functions without detecting the malfunction and if no other malfunction has been
identified that would independently illuminate the MIL according to the requirements outlined above.
5) Erasing a fault code
The diagnostic system may erase a fault code if the same fault is not re-registered in at least 40 engine warm-up cycles, and the
MIL is not illuminated for that fault code.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 16 of 417

6) Communication Line (CAN)

• Bus Topology : Line (bus) structure
• Wiring : Twisted pair wire
• Off Board DLC Cable Length : Max. 5m
• Data Transfer Rate
- Diagnostic : 500 kbps
- Service Mode (Upgrade, Writing VIN) : 500 or 1Mbps)
7) Driving cycle
A driving cycle consists of engine start up, and engine shut off.
8) Warm-up cycle
A warm-up cycle means sufficient vehicle operation such that the engine coolant temperature has risen by at least 40 degrees
Fahrenheit from engine starting and reaches a minimum temperature of at least 160 degrees Fahrenheit.
9) Trip cycle
A trip means vehicle operation (following an engine-off period) of duration and driving mode such that all components and
systems are monitored at least once by the diagnostic system except catalyst efficiency or evaporative system monitoring when a
steady-speed check is used, subject to the limitation that the manufacturer-defined trip monitoring conditions shall all be
encountered at least once during the first engine start portion of the applicable FTP cycle.
10) DTC format
• Diagnostic Trouble Code (SAE J2012)
• DTCs used in OBD-II vehicles will begin with a letter and are followed by four numbers.
The letter of the beginning of the DTC identifies the function of the monitored device that has failed. A "P" indicates a powertrain

cardiagn.com
device, "C" indicates a chassis device. "B" is for body device and "U" indicates a network or data link code. The first number
indicates if the code is generic (common to all manufacturers) or if it is manufacturer specific. A "0" & "2" indicates generic, "1"
indicates manufacturer-specific. The second number indicates the system that is affected with a number between 1 and 7.
The following is a list showing what numbers are assigned to each system.
1. Fuel and air metering
2. Fuel and air metering(injector circuit malfunction only)
3. Ignition system or misfire
4. Auxiliary emission controls
5. Vehicle speed controls and idle control system
6. Computer output circuits
7. Transmission
The last two numbers of the DTC indicates the component or section of the system where the fault is located.
11) Freeze frame data
When a freeze frame event is triggered by an emission related DTC, the ECM or PCM stores various vehicle information as it
existed the moment the fault ocurred. The DTC number along with the engine data can be useful in aiding a technician in locating
the cause of the fault. Once the data from the 1st driving cycle DTC ocurrence is stored in the freeze frame memory, it will remain
there even when the fault ocurrs again (2nd driving cycle) and the MIL is illuminated.
• Freeze Frame List
1) Calculated Load Value
2) Engine RPM
3) Fuel Trim
4) Fuel Pressure (if available)
5) Vehicle Speed (if available)
6) Coolant Temperature
7) Intake Manifold Pressure (if available)
8) Closed-or Open-loop operation
9) Fault code

3. OBD-II system readiness tests

1) Catalyst monitoring
The catalyst efficiency monitor is a self-test strategy within the ECM or PCM that uses the downstream Heated Oxygen Sensor
(HO2S) to determine when a catalyst has fallen below the minimum level of effectiveness in its ability to control exhaust emission.
2) Misfire monitoring
Misfire is defined as the lack of proper combustion in the cylinder due to the absence of spark, poor fuel metering, or poor
compression. Any combustion that does not occur within the cylinder at the proper time is also a misfire. The misfire detection
monitor detects fuel, ignition or mechanically induced misfires. The intent is to protect the catalyst from permanent damage and to
alert the customer of an emission failure or an inspection maintenance failure by illuminating the MIL . When a misfire is detected,
special software called freeze frame data is enabled. The freeze frame data captures the operational state of the vehicle when a
fault is detected from misfire detection monitor strategy.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 17 of 417

3) Fuel system monitoring

The fuel system monitor is a self-test strategy within the ECM or PCM that monitors the adaptive fuel table The fuel control
system uses the adaptive fuel table to compensate for normal variability of the fuel system components caused by wear or aging.
During normal vehicle operation, if the fuel system appears biased lean or rich, the adaptive value table will shift the fuel delivery
calculations to remove bias.
4) Engine cooling system monitoring
The cooling system monitoring is a self-test strategy within the ECM or PCM that monitors ECTS (Engine Coolant Temperature
Sensor) and thermostat about circuit continuity, output range, rationality faults.
5) O2 sensor monitoring
OBD-II regulations require monitoring of the upstream Heated O2 Sensor (H2OS) to detect if the deterioration of the sensor has
exceeded thresholds. An additional HO2S is located downstream of the Warm-Up Three Way Catalytic Converter (WU-TWC) to
determine the efficiency of the catalyst.
Although the downstream H2OS is similar to the type used for fuel control, it functions differently. The downstream HO2S is
monitored to determine if a voltage is generated. That voltage is compared to a calibrated acceptable range.
6) Evaporative emission system monitoring
The EVAP. monitoring is a self-test strategy within the ECM or PCM that tests the integrity of the EVAP. system. The complete
evaporative system detects a leak or leaks that cumulatively are greater than or equal to a leak caused by a 0.040 inch and 0.020
inch diameter orifice.
7) Air conditioning system monitoring
The A/C system monitoring is a self-test strategy within the ECM or PCM that monitors malfunction of all A/C system components
at A/C ON.
8) Comprehensive components monitoring

cardiagn.com
The comprehensive components monitoring is a self-test strategy within the ECM or PCM that detects fault of any electronic
powertrain components or system that provides input to the ECM or PCM and is not exclusively an input to any other OBD-II
monitor.
9) A/C system component monitoring
Requirement:
If a vehicle incorporates an engine control strategy that alters off idle fuel and/or spark control when the A/C system is on, the
OBD II system shall monitor all electronic air conditioning system components for malfunctions that cause the system to fail to
invoke the alternate control while the A/C system is on or cause the system to invoke the alternate control while the A/C system is
off.
Additionally, the OBD II system shall monitor for malfunction all electronic air conditioning system components that are used as
part of the diagnostic strategy for any other monitored system or component.
Implementation plan:
No engine control strategy incorporated that alters offidle fuel and/or spark control when A/C system is on. Malfuction of A/C
system components is not used as a part of the diagnostic strategy for other monitored system or component.

Fuel System > Engine Control System > Components and Components Location
Components Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 18 of 417

1. ECM (Engine Control Module) 13. Fuel Level Sensor (FLS)

cardiagn.com
2. Manifold Absolute Pressure Sensor (MAPS) 14. A/C Pressure Transducer (APT)
3. Intake Air Temperature Sensor (IATS) 15. Injector
4. Engine Coolant Temperature Sensor (ECTS) 16. Idle Speed Control Actuator (ISCA)
5. Throttle Position Sensor (TPS) 17. Purge Control Solenoid Valve (PCSV)
6. Crankshaft Position Sensor (CKPS) 18. CVVT Oil Control Valve (OCV)
7. Camshaft Position Sensor (CMPS) 19. Canister Close Valve (CCV)
8. Knock Sensor (KS) 20. Ignition Coil
9. Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] 21. Main Relay
10. Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] 22. Fuel Pump Relay
11. CVVT Oil Temperature Sensor (OTS) 23. Data Link Connector (DLC)
12. Fuel Tank Pressure Sensor (FTPS) 24. Multi-Purpose Check Connector

2. Manifold Absolute Pressure Sensor (MAPS)

1. ECM (Engine Control Module) 3. Intake Air Temperature Sensor (IATS)
15. Injector

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 19 of 417

16. Idle Speed Control Actuator (ISCA)

4. Engine Coolant Temperature Sensor (ECTS)

11. CVVT Oil Temperature Sensor (OTS) 5. Throttle Position Sensor (TPS)
18. CVVT Oil Control Valve (OCV)

cardiagn.com
6. Crankshaft Position Sensor (CKPS) 7. Camshaft Position Sensor (CMPS)

8. Knock Sensor (KS) 9. Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]

12. Fuel Tank Pressure Sensor (FTPS)

10. Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2]
19. Canister Close Valve (CCV)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 20 of 417

13. Fuel Level Sensor (FLS) 14. A/C Pressure Transducer (APT)

cardiagn.com
17. Purge Control Solenoid Valve (PCSV) 20. Ignition Coil

21. Main Relay

22. Fuel Pump Relay

Fuel System > Engine Control System > Engine Control Module (ECM) > Specifications
ECM Terminal And Input/Output signal
ECM Harness Connector

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 21 of 417

ECM Terminal Function

Connector [CBG-K]

Pin
Description Connected to
No.
1 Power Ground Chassis Ground
2 Battery voltage supply after ignition switch Ignition Switch
3 Power Ground Chassis Ground
4 Battery voltage supply after main relay Main Relay
5 ECM Ground Chassis Ground
6 Battery Power (B+) Battery
Ignition Coil (Cylinder #1,4) control output
Ignition Coil (Cylinder #1,4)

cardiagn.com
[With Immobilizer]
7
Ignition Coil (Cylinder #2,3) control output
Ignition Coil (Cylinder #2,3)
[Without Immobilizer]
8 Shield Ignition Coil
9 Sensor ground Manifold Absolute Pressure Sensor (MAPS)
10 Manifold Absolute Pressure Sensor signal input Manifold Absolute Pressure Sensor (MAPS)
11 -
12 Ground Immobilizer Control Module
13 A/C Pressure Transducer signal input A/C Pressure Transducer (APT)
14 Sensor ground Engine Coolant Temperature Sensor (ECTS)
15 Engine Coolant Temperature Sensor signal input Engine Coolant Temperature Sensor (ECTS)
16 Sensor ground Heated Oxygen Sensor (Sensor 1)
17 Heated Oxygen Sensor (Sensor 1) signal input Heated Oxygen Sensor (Sensor 1)
18 Intake Air Temperature Sensor signal input Intake Air Temperature Sensor (IATS)
19 -
20 -
21 Sensor ground Knock Sensor (KS)
22 Knock Sensor signal input Knock Sensor (KS)
23 Sensor power (+5V) Throttle Position Sensor (TPS)
24 -
25 Injector (Cylinder #1) control output Injector (Cylinder #1)
26 Injector (Cylinder #3) control output Injector (Cylinder #3)
27 Injector (Cylinder #4) control output Injector (Cylinder #4)
28 Injector (Cylinder #2) control output Injector (Cylinder #2)
Ignition Coil (Cylinder #2,3) control output
Ignition Coil (Cylinder #2,3)
[With Immobilizer]
29
Ignition Coil (Cylinder #1,4) control output
Ignition Coil (Cylinder #1,4)
[Without Immobilizer]
30 -
31 -

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 22 of 417

32 -
33 Fuel Tank Pressure Sensor signal input Fuel Tank Pressure Sensor (FTPS)
34 Sensor ground Fuel Tank Pressure Sensor (FTPS)
35 -
36 -
37 Sensor ground CVVT Oil Temperature Sensor (OTS)
38 Heated Oxygen Sensor (Sensor 2) signal input Heated Oxygen Sensor (Sensor 2)
39 Sensor ground Heated Oxygen Sensor (Sensor 2)
40 CVVT Oil Temperature Sensor signal input CVVT Oil Temperature Sensor (OTS)
41 Throttle Position Sensor signal input Throttle Position Sensor (TPS)
42 Sensor ground Throttle Position Sensor (TPS)
43 -
44 -
45 -
46 -
47 Sensor power (+5V) A/C Pressure Transducer (APT)
Manifold Absolute Pressure Sensor (MAPS),

cardiagn.com
48 Sensor power (+5V)
Fuel Tank Pressure Sensor (FTPS)
49 -
50 -
51 -
52 -
53 Vehicle speed signal input ABS/ESC Control Module [With ABS/ESC]
54 -
55 Wheel Speed Sensor [A] signal input Wheel Speed Sensor (WSS)[Without ABS/ESC]
56 Wheel Speed Sensor [B] signal input Wheel Speed Sensor (WSS)[Without ABS/ESC]
57 Sensor ground A/C Pressure Transducer (APT)
58 -
59 -
60 A/C switch "ON" signal input A/C Switch
61 -
62 A/C thermal switch signal input A/C Thermal Switch
63 Fuel consumption signal output Trip Computer
64 Main Relay control output Main Relay
65 Cooling Fan Relay [Low] control output Cooling Fan Relay [Low]
66 CVVT Oil Control Valve control output CVVT Oil Control Valve (OCV)
67 Purge Control Solenoid Valve control output Purge Control Solenoid Valve (PCSV)
68 -
69 Immobilizer lamp control output Immobilizer Lamp
70 Fuel Pump Relay control output Fuel Pump Relay
71 -
72 -
73 Battery voltage supply after main relay Main Relay
74 Alternator load signal input Alternator
75 Immobilizer communication line Immobilizer Control Module
76 -

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 23 of 417

Other control module, Data Link Connector (DLC), Multi-

77 CAN [HIGH]
Purpose Check Connector
Other control module, Data Link Connector (DLC), Multi-
78 CAN [LOW]
Purpose Check Connector
79 Sensor ground Camshaft Position Sensor (CMPS)
80 Camshaft Position Sensor signal input Camshaft Position Sensor (CMPS)
81 Sensor ground Crankshaft Position Sensor (CKPS)
82 Crankshaft Position Sensor signal input Crankshaft Position Sensor (CKPS)
83 -
84 -
85 -
86 Engine speed signal output Cluster (Tachometer)
87 A/C Compressor Relay control output A/C Compressor Relay
88 Cooling Fan Relay [High] control output Cooling Fan Relay [High]
89 Idle Speed Control Actuator [OPEN] control output Idle Speed Control Actuator (ISCA)
90 Idle Speed Control Actuator [CLOSE] control output Idle Speed Control Actuator (ISCA)
91 Canister Close Valve control output Canister Close Valve (CCV)

cardiagn.com
92 Malfunction Indicator Lamp (MIL) control output Cluster (Malfunction Indicator Lamp)
Heated Oxygen Sensor (Sensor 1) Heater control
93 Heated Oxygen Sensor (Sensor 1)
output
Heated Oxygen Sensor (Sensor 2) Heater control
94 Heated Oxygen Sensor (Sensor 2)
output

ECM Terminal Input/Output Signal

Connector [CBG-K]

Pin
Description Condition Type Level Test Result
No.
1 Power Ground Idle DC Max. 50mV

Battery voltage supply after ignition IG OFF Max. 1.0V 1.18mV

2 DC
switch IG ON Battery Voltage 12.7V
3 Power Ground Idle DC Max. 50mV -4.37mV
IG OFF Max. 1.0V -5.1mV
4 Battery voltage supply after main relay DC
IG ON Battery Voltage 12.3V
5 ECM Ground Idle DC Max. 50mV 10.1mV
6 Battery Power (B+) Always DC Battery Voltage 12.2V

Ignition Coil (Cylinder #1,4) control 1st Voltage: 300 ~ 400V 372V
Idle Pulse
output [With Immobilizer] ON Voltage: Max. 2.0V 1.6V
7
Ignition Coil (Cylinder #2,3) control 1st Voltage: 300 ~ 400V 372V
Idle Pulse
output [Without Immobilizer] ON Voltage: Max. 2.0V 1.6V
8 Shield Idle DC Max. 50mV 18.3mV
9 Sensor ground Idle DC Max. 50mV 18.7mV

Manifold Absolute Pressure Sensor IG ON 3.9 ~ 4.1V 4.09V

10 DC
signal input Idle 0.8 ~ 1.6V 1.44V
11 -
12 Ground Idle DC Max. 50mV
A/C OFF:1.18V
13 A/C Pressure Transducer signal input Idle DC 0.4 ~ 4.6V
A/C ON:1.48V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 24 of 417

14 Sensor ground Idle DC Max. 50mV 13.0mV

Engine Coolant Temperature Sensor
15 Idle DC 0.5 ~ 4.5V 1.84V
signal input
16 Sensor ground Idle DC Max. 50mV

Heated Oxygen Sensor (Sensor 1) Rich: 0.6 ~ 1.0V

17 Racing Analog
signal input Lean: Max. 0.4V
Intake Air Temperature Sensor signal
18 Idle Analog 0 ~ 5.0V 3.63V
input
19 -
20 -
21 Sensor ground Idle DC Max. 50mV
Knocking Variable
22 Knock Sensor signal input
Normal Frequency

IG OFF Max. 0.5V 0V

23 Sensor power (+5V) DC
IG ON 4.9 ~ 5.1V 5.03V
24 -
Hi: Battery Voltage 14.4V

cardiagn.com
25 Injector (Cylinder #1) control output Idle DC Lo: Max. 1.0V 280mV
Vpeak: Max. 80V 48.8V
Hi: Battery Voltage 14.2V
26 Injector (Cylinder #3) control output Idle DC Lo: Max. 1.0V 240mV
Vpeak: Max. 80V 49.0V
Hi: Battery Voltage 14.4V
27 Injector (Cylinder #4) control output Idle DC Lo: Max. 1.0V 280mV
Vpeak: Max. 80V 48.8V
Hi: Battery Voltage 14.2V
28 Injector (Cylinder #2) control output Idle DC Lo: Max. 1.0V 240mV
Vpeak: Max. 80V 49.0V

Ignition Coil (Cylinder #1,4) control 1st Voltage: 300 ~ 400V 376V
Idle Pulse
output [With Immobilizer] ON Voltage: Max. 2.0V 1.36V
29
Ignition Coil (Cylinder #2,3) control 1st Voltage: 300 ~ 400 376V
Idle Pulse
output [Without Immobilizer] ON Voltage: Max. 2.0V 1.36V
30 -
31 -
32 -
Fuel Tank Pressure Sensor signal
33 Idle DC 0.4 ~ 4.6 V 2.58V
input
34 Sensor ground Idle DC Max. 50mV 16.1mV
35 -
36 -
37 Sensor ground Idle DC Max. 50mV 17.3mV

Heated Oxygen Sensor (Sensor 2) Rich: 0.6 ~ 1.0V 640mV

38 Racing Analog
signal input Lean: Max. 0.4V 22mV
39 Sensor ground Idle DC Max. 50mV 3.14mV
CVVT Oil Temperature Sensor signal
40 Idle Analog 0.5 ~ 4.5V 950mV
input
C.T 0.25 ~ 0.9V 307mV

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 25 of 417

41 Throttle Position Sensor signal input W.O.T Analog Min. 4.0V 4.28V
42 Sensor ground Idle DC Max. 50mV 13.6mV
43 -
44 -
45 -
46 -
IG OFF Max. 0.5V 2.61mV
47 Sensor power (+5V) DC
IG ON 4.9 ~ 5.1V 5.04V
IG OFF Max. 0.5V 3.16mV
48 Sensor power (+5V) DC
IG ON 4.9 ~ 5.1V 5.06V
49 -
50 -
51 -
52 -
Hi: Min. 4.5V 13.0V
53 Vehicle speed signal input Vehicle Run Pulse
Lo: Max. 0.5V -200mV
54 -

cardiagn.com
15Hz: Min. 0.13Vpp
Vehicle Run SINE
55 Wheel Speed Sensor [A] signal input 1,000Hz: Min 0.2Vpp
(30km/h) Wave
Overall: Max. 250Vpp
15Hz: Min. 0.13Vpp
Vehicle Run SINE
56 Wheel Speed Sensor [B] signal input 1,000Hz: Min 0.2Vpp
(30km/h) Wave
Overall: Max. 250Vpp
57 Sensor ground Idle DC Max. 50mV 10mV
58 -
59 -
A/C S/W OFF Max. 1.0V 0mV
60 A/C switch "ON" signal input DC
A/C S/W ON Battery Voltage 12.8V
61 -
A/C S/W OFF Max. 1.0V 0mV
62 A/C thermal switch signal input DC
A/C S/W ON Battery Voltage 12.8V
Hi : Battery Voltage 13.8V
63 Fuel consumption signal output Idle Pulse
Lo : Max. 1.0V 0.1V
Relay OFF Battery Voltage 12.9V
64 Main Relay control output DC
Relay ON Max. 1.0V 0.88V

Cooling Fan Relay [Low] control Relay OFF Battery Voltage 12.9V
65 DC
output Relay ON Max. 1.0V 30mV
Hi : Battery Voltage 14.8V
66 CVVT Oil Control Valve control output Idle Pulse
Lo : Max. 1.0V 100mV

Purge Control Solenoid Valve control Active Hi: Battery Voltage 14.2V
67 Pulse
output Inactive Lo: Max. 1.0V 100mV
68 -
Lamp OFF Battery Voltage
69 Immobilizer lamp control output DC
Lamp ON Max. 2.0V
Relay OFF Battery Voltage 13V
70 Fuel Pump Relay control output DC

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 26 of 417

Relay ON Max. 1.0V 100mV

71 -
72 -

Battery voltage supply after main IG OFF Max. 1.0V -5.1mV

73 DC
relay IG ON Battery Voltage 12.3V
Hi : Battery Voltage 14.0V
74 Alternator load signal input Idle Pulse
Lo : Max. 1.5V 10mV
When
Hi: Min. 8.5V
communicating
75 Immobilizer communication line Pulse
after
Lo: Max. 3.5V
IG ON
76 -
RECESSIVE 2.0 ~ 3.0V 2.55V
77 CAN [HIGH] Pulse
DOMINANT 2.75 ~ 4.5V 3.57V
RECESSIVE 2.0 ~ 3.0V 2.55V
78 CAN [LOW] Pulse
DOMINANT 0.5 ~ 2.25V 1.44V
79 Sensor ground Idle DC Max. 50mV 10mV

Camshaft Position Sensor signal Hi: Vcc 5.0V

cardiagn.com
80 Idle Pulse
input Lo: Max. 0.5V 0.2V
81 Sensor ground Idle DC Max. 50mV 10mV

Crankshaft Position Sensor signal Hi: Vcc 5.0V

82 Idle Pulse
input Lo: Max. 0.5V 40mV
83 -
84 -
85 -
Hi: Battery Voltage 14.0V
86 Engine speed signal output Idle Pulse Lo: Max. 0.5V 100mV
Freq : 20 ~ 26Hz 21.8Hz
Relay OFF Battery Voltage 14.1V
87 A/C Compressor Relay control output DC
Relay ON Max. 1.0V 0.1V

Cooling Fan Relay [High] control Relay OFF Battery Voltage 14.1V
88 DC
output Relay ON Max. 1.0V 320mV

Idle Speed Control Actuator [OPEN] Hi: Battery Voltage 14.6V

89 Idle Pulse
control output Lo: Max. 1.0V 192mV

Idle Speed Control Actuator [CLOSE] Hi: Battery Voltage 14.9V

90 Idle Pulse
control output Lo: Max. 1.0V 248mV

Active Hi: Battery Voltage 14.0V

91 Canister Close Valve control output Pulse
Inactive Lo: Max. 1.0V 170mV

Malfunction Indicator Lamp (MIL) Lamp OFF Battery Voltage 13V

92 DC
control output Lamp ON Max. 1.0V 50mV

Heated Oxygen Sensor (Sensor 1) Hi: Battery Voltage 14V

93 Engine Run Pulse
Heater control output Lo: Max. 1.0V 0.3V

Heated Oxygen Sensor (Sensor 2) Hi: Battery Voltage 14V

94 Engine Run Pulse
Heater control output Lo: Max. 1.0V 0.3V

Fuel System > Engine Control System > Engine Control Module (ECM) > Schematic Diagrams

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 27 of 417

Circuit Diagram

cardiagn.com

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 28 of 417

cardiagn.com

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 29 of 417

cardiagn.com

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 30 of 417

cardiagn.com
Fuel System > Engine Control System > Engine Control Module (ECM) > Repair procedures
Removal
1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
2. Disconnect the ECM connector (A).

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 31 of 417

3. Remove the air cleaner & ECM assembly (Refer to "Engine And Transaxle Assembly" in EM group).
4. Remove the ECM mounting bolts (B) and then remove the ECM.

Installation

• In case of the vehicle equipped with immobilizer, perform "Key Teaching" procedure together (Refer to "Immobilizer" in
BE group).

1. Installation is reverse of removal.

cardiagn.com
ECM installation bolts:
9.8 ~ 11.8N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7lb-ft)

ECM Problem Inspection Procedure

1. TEST ECM GROUND CIRCUIT: Measure resistance between ECM and chassis ground using the backside of ECM harness
connector as ECM side check point. If the problem is found, repair it.

Specification (Resistance): 1Ω or less

2. TEST ECM CONNECTOR: Disconnect the ECM connector and visually check the ground terminals on ECM side and harness
side for bent pins or poor contact pressure. If the problem is found, repair it.
3. If problem is not found in Step 1 and 2, the ECM could be faulty. If so, replace the ECM with a new one, and then check the
vehicle again. If the vehicle operates normally then the problem was likely with the ECM.
4. RE-TEST THE ORIGINAL ECM : Install the original ECM (may be broken) into a known-good vehicle and check the vehicle. If
the problem occurs again, replace the original ECM with a new one. If problem does not occur, this is intermittent problem
(Refer to INTERMITTENT PROBLEM PROCEDURE in BASIC INSPECTION PROCEDURE).

VIN Programming Procedure

VIN (Vehicle Identification Number) is a number that has the vehicle's information (Maker, Vehicle Type, Vehicle Line/Series,
Body Type, Engine Type, Transmission Type, Model Year, Plant Location and so forth. For more information, please refer to the
group "GI" in this SERVICE MANUAL). When replacing an ECM, the VIN must be programmed in the ECM. If there is no VIN in
ECM memory, the fault code (DTC P0630) is set.

The programmed VIN cannot be changed. When writing the VIN, confirm the VIN carefully

1. Select "VIN Writing" function in "Vehicle S/W Management".

2. Select "Write VIN" in "ID Resister".

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 32 of 417

3. Input the VIN.

Before inputing the VIN, confirm the VIN again because the programmed VIN cannot be changed.

cardiagn.com
4. Turn the ignition switch OFF, then back ON.

Fuel System > Engine Control System > Manifold Absolute Pressure Sensor (MAPS) >
Description and Operation
Description
Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and is installed on the surge tank. It senses absolute
pressure of the surge tank and transfers the analog signal proportional to the pressure to the ECM. By using this signal, the ECM
calculates the intake air quantity and engine speed.
The MAPS consists of a piezo-electric element and a hybrid IC amplifying the element output signal. The element is silicon
diaphragm type and adapts pressure sensitive variable resistor effect of semi-conductor. Because 100% vacuum and the
manifold pressure apply to both sides of the sensor respectively, this sensor can output analog signal by using the silicon
variation proportional to pressure change.

Fuel System > Engine Control System > Manifold Absolute Pressure Sensor (MAPS) >
Specifications
Specification
Pressure (kPa) Output Voltage (V)
20.0 0.79

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 33 of 417

46.66 1.84
101.32 4.0

Fuel System > Engine Control System > Manifold Absolute Pressure Sensor (MAPS) >
Schematic Diagrams
Circuit Diagram

cardiagn.com
Fuel System > Engine Control System > Manifold Absolute Pressure Sensor (MAPS) > Repair
procedures
Inspection
1. Connect a scan tool on Data Link Connector (DLC).
2. Check MAPS output voltage at idle and IG ON.

Condition Output Voltage (V)

IG ON 3.9 ~ 4.1
Idle 0.8 ~ 1.6

Fuel System > Engine Control System > Intake Air Temperature Sensor (IATS) > Description and
Operation
Description
Intake Air Temperature Sensor (IATS) is included inside Manifold Absolute Pressure Sensor and detects the intake air
temperature.
To calculate precise air quantity, correction of the air temperature is needed because air density varies according to the

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 34 of 417

temperature. So the ECM uses not only MAPS signal but also IATS signal. This sensor has a Negative Temperature Coefficient
(NTC) and its resistance is in inverse proportion to the temperature.

Fuel System > Engine Control System > Intake Air Temperature Sensor (IATS) > Specifications
Specification
Temperature [°C(°F)] Resistance(kΩ)
-40 (-40) 40.93 ~ 48.35
-30 (-22) 23.43 ~ 27.34
-20 (-4) 13.89 ~ 16.03

cardiagn.com
-10 (14) 8.50 ~ 9.71
0 (32) 5.38 ~ 6.09
10 (50) 3.48 ~ 3.90
20 (68) 2.31 ~ 2.57
25 (77) 1.90 ~ 2.10
30 (86) 1.56 ~ 1.74
40 (104) 1.08 ~ 1.21
60 (140) 0.54 ~ 0.62
80 (176) 0.29 ~ 0.34

Fuel System > Engine Control System > Intake Air Temperature Sensor (IATS) > Schematic
Diagrams
Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 35 of 417

Fuel System > Engine Control System > Intake Air Temperature Sensor (IATS) > Repair
procedures

cardiagn.com
Inspection
1. Turn ignition switch OFF.
2. Disconnect IATS connector.
3. Measure resistance between IATS terminals 3 and 4.
4. Check that the resistance is within the specification.

Specification: Refer to “Specification”

Fuel System > Engine Control System > Engine Coolant Temperature Sensor (ECTS) >
Description and Operation
Description
Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the
engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the temperature.
The electrical resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases. The
reference +5V is supplied to the ECTS via a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the ECTS
are connected in series. When the resistance value of the thermistor in the ECTS changes according to the engine coolant
temperature, the output voltage also changes.
During cold engine operation, the ECM increases the fuel injection duration and controls the ignition timing using the information
of engine coolant temperature to avoid engine stalling and improve drivability.

Fuel System > Engine Control System > Engine Coolant Temperature Sensor (ECTS) >
Specifications

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 36 of 417

Specification
Temperature [°C(°F)] Resistance(kΩ)
-40(-40) 48.14
-20(-4) 14.13 ~ 16.83
0(32) 5.79
20(68) 2.31 ~ 2.59
40(104) 1.15
60(140) 0.59
80(176) 0.32

Fuel System > Engine Control System > Engine Coolant Temperature Sensor (ECTS) >
Schematic Diagrams
Circuit Diagram

cardiagn.com
Fuel System > Engine Control System > Engine Coolant Temperature Sensor (ECTS) > Repair
procedures
Inspection
1. Turn ignition switch OFF.
2. Disconnect ECTS connector.
3. Remove the ECTS.
4. After immersing the thermistor of the sensor into engine coolant, measure resistance between ECTS terminals 1 and 3.
5. Check that the resistance is within the specification.

Specification: Refer to “Specification”

Fuel System > Engine Control System > Throttle Position Sensor (TPS) > Description and
Operation
Description
The Throttle Position Sensor (TPS) is mounted on the throttle body and detects the opening angle of the throttle plate. The TPS
has a variable resistor (potentiometer) which is changed according to the throttle angle.
During acceleration, the TPS resistance between the reference +5V and the signal terminal decreases and output voltage
increases; during deceleration, the TPS resistance increases and TPS output voltage decreases. The TPS output voltage will

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 37 of 417

vary from 0.25~0.9V at closed throttle to minimum 4.0V at wide-open throttle.

The ECM determines operating conditions such as idle (closed throttle), part load, acceleration / deceleration, and wide-open
throttle by using the TPS signal. Also the ECM uses the Manifold Absolute Pressure Sensor (MAPS) signal along with the TPS
signal to adjust fuel injection duration and ignition timing.

Fuel System > Engine Control System > Throttle Position Sensor (TPS) > Specifications
Specification

cardiagn.com
Throttle Angle Output Voltage(V)
C.T 0.25 ~ 0.9
W.O.T Min. 4.0

Item Specification
Sensor Resistance(kΩ) 1.6 ~ 2.4(20°C)

Fuel System > Engine Control System > Throttle Position Sensor (TPS) > Schematic Diagrams
Circuit Diagram

Fuel System > Engine Control System > Throttle Position Sensor (TPS) > Repair procedures
Inspection
1. Connect a scan tool on the Data Link Connector (DLC).
2. Start engine and check output voltages of TPS at C.T and W.O.T.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 38 of 417

Specification: Refer to “Specification”

3. Turn ignition switch OFF and disconnect the scan tool from the DLC.
4. Disconnect TPS connector and measure resistance between TPS terminals 2 and 3.

Specification: Refer to “Specification”

Fuel System > Engine Control System > Crankshaft Position Sensor (CKPS) > Description and
Operation
Description
Crankshaft Position Sensor (CKPS) detects the crankshaft position and is one of the most important sensors of the engine control
system. If there is no CKPS signal input, the engine may stop because of CKPS signal missing. This sensor is installed on the
cylinder block or the transaxle housing and generates alternating current by magnetic flux field which is made by the sensor and
the target wheel when engine runs.
The target wheel consists of 58 slots and 2 missing slots on 360 degrees CA (Crank Angle).

cardiagn.com
Fuel System > Engine Control System > Crankshaft Position Sensor (CKPS) > Troubleshooting
Waveform

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 39 of 417

cardiagn.com
Fuel System > Engine Control System > Crankshaft Position Sensor (CKPS) > Schematic
Diagrams
Circuit Diagram

Fuel System > Engine Control System > Crankshaft Position Sensor (CKPS) > Repair
procedures
Inspection
1. Check signal waveform of CKPS and CMPS using a scan tool.

Specification: Refer to “Waveform”

Fuel System > Engine Control System > Camshaft Position Sensor (CMPS) > Description and
Operation
Description

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 40 of 417

Camshaft Position Sensor (CMPS) is a hall sensor and detects the camshaft position by using a hall element.
It is related with Crankshaft Position Sensor (CKPS) and detects the piston position of each cylinder which the CKPS can't detect.
The CMPS is installed on engine head cover and uses a target wheel installed on the camshaft. This sensor has a hall-effect IC
which output voltage changes when magnetic field is made on the IC with current flow.

Fuel System > Engine Control System > Camshaft Position Sensor (CMPS) > Troubleshooting
Waveform

cardiagn.com

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 41 of 417

cardiagn.com
Fuel System > Engine Control System > Camshaft Position Sensor (CMPS) > Schematic
Diagrams
Circuit Diagram

Fuel System > Engine Control System > Camshaft Position Sensor (CMPS) > Repair procedures
Inspection
1. Check signal waveform of CKPS and CMPS using a scan tool.

Specification: Refer to “Waveform”

Fuel System > Engine Control System > Knock Sensor (KS) > Description and Operation
Description
Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS)
is installed on the cylinder block and senses engine knocking.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 42 of 417

When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. At this time, this
sensor transfers the voltage signal higher than the specified value to the ECM and the ECM retards the ignition timing. If the
knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This sequential control can
improve engine power, torque and fuel economy.

Fuel System > Engine Control System > Knock Sensor (KS) > Specifications
Specification
Item Specification
Capacitance(pF) 950 ~ 1,350
Resistance (MΩ) 4.87

cardiagn.com
Fuel System > Engine Control System > Knock Sensor (KS) > Schematic Diagrams
Circuit Diagram

Fuel System > Engine Control System > Heated Oxygen Sensor (HO2S) > Description and
Operation
Description
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed on upstream and downstream of the Manifold
Catalytic Converter (MCC).
After it compares oxygen consistency of the atmosphere with the exhaust gas, it transfers the corresponding voltage signal to the
ECM. When A/F ratio is rich or lean, it generates approximately +1V or 0V respectively.
In order that this sensor normally operates, the temperature of the sensor tip must be higher than predetermined temperature. So
it has a heater which is controlled by the ECM duty signal. When the exhaust gas temperature is lower than the specified value,
the heater warms the sensor tip.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 43 of 417

Fuel System > Engine Control System > Heated Oxygen Sensor (HO2S) > Specifications
Specification
A/F Ratio (λ) Output Voltage(V)
Rich 0.6 ~ 1.0
Lean 0 ~ 0.4

Item Specification

cardiagn.com
Heater Resistance(Ω) Approx. 9.0(20°C)

Fuel System > Engine Control System > Heated Oxygen Sensor (HO2S) > Troubleshooting
Waveform

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 44 of 417

Fuel System > Engine Control System > Heated Oxygen Sensor (HO2S) > Schematic Diagrams

cardiagn.com
Circuit Diagram

Fuel System > Engine Control System > Heated Oxygen Sensor (HO2S) > Repair procedures
Inspection
1. Check signal waveform of HO2S using a scan tool.

Specification: Refer to "Waveform"

2. Disconnect the HO2S connector.

3. Measure resistance between HO2S heater terminals 3 and 4.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 45 of 417

4. Check that the resistance is within the specification.

Specification: Refer to “Specification”

Fuel System > Engine Control System > CVVT Oil Temperature Sensor (OTS) > Description and
Operation
Description
The Continuously Variable Valve Timing (CVVT) system controls the amount of valve overlap by varying the amount of oil flow
into an assembly mounted on the intake camshaft through ECM control of an oil control valve. An Oil Temperature Sensor (OTS)
is used to allow ECM monitoring of engine oil temperature. As oil is directed into the chambers of the CVVT assembly, the cam
phase is changed to suit various performance and emissions requirements.
1. When camshaft rotates engine rotation-wise: Intake-Advance / Exhaust-Retard
2. When camshaft rotates counter engine rotation-wise: Intake- Retard / Exhaust- Advance

cardiagn.com
Fuel System > Engine Control System > CVVT Oil Temperature Sensor (OTS) > Specifications
Specification
Temperature [°C(°F)] Resistance (kΩ)
-40(-40) 52.15
-20(-4) 16.52
0(32) 6.0
20(68) 2.45
40(104) 1.11
60(140) 0.54
80(176) 0.29

Fuel System > Engine Control System > CVVT Oil Temperature Sensor (OTS) > Schematic
Diagrams
Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 46 of 417

Fuel System > Engine Control System > CVVT Oil Temperature Sensor (OTS) > Repair
procedures

cardiagn.com
Inspection
1. Turn the ignition switch OFF.
2. Disconnect the OTS connector.
3. Remove the OTS.
4. After immersing the thermistor of the sensor into engine coolant, measure resistance between the OTS terminals 1 and 2.
5. Check that the resistance is within the specification.

Specification: Refer to “Specification”

Fuel System > Engine Control System > Fuel Tank Pressure Sensor (FTPS) > Description and
Operation
Description
Fuel Tank Pressure Sensor (FTPS) is a component of the evaporative emission control system and is installed on the fuel tank,
the fuel pump, or the canister. It checks the purge control solenoid valve operation and detects a leakage of the system.

Fuel System > Engine Control System > Fuel Tank Pressure Sensor (FTPS) > Specifications
Specification
Pressure (kPa) Output Voltage (V)
-6.67 0.5
0 2.5

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 47 of 417

+6.67 4.5

Fuel System > Engine Control System > Fuel Tank Pressure Sensor (FTPS) > Schematic
Diagrams
Circuit Diagram

cardiagn.com
Fuel System > Engine Control System > Fuel Tank Pressure Sensor (FTPS) > Repair procedures
Inspection
1. Connect a scantool on the Data Link Connector (DLC).
2. Measure the output voltage of the FTPS.

Specification: Refer to "Specification"

Fuel System > Engine Control System > Injector > Description and Operation
Description
Based on information from various sensors, the ECM can calculate the fuel amount to be injected. The fuel injector is a solenoid-
operated valve and the fuel injection amount is controlled by length of injection time. The ECM controls each injector by grounding
the control circuit. When the ECM energizes the injector by grounding the control circuit, the circuit voltage should be low
(theoretically 0V) and the fuel is injected. When the ECM de-energizes the injector by opening control circuit, the fuel injector is
closed and circuit voltage should momentarily peak.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 48 of 417

Fuel System > Engine Control System > Injector > Specifications
Specification
Item Specification
Coil Resistance (Ω) 13.8 ~ 15.2 [20°C(68°F)]

Fuel System > Engine Control System > Injector > Schematic Diagrams

cardiagn.com
Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 49 of 417

cardiagn.com
Fuel System > Engine Control System > Injector > Repair procedures
Inspection
1. Turn ignition switch OFF.
2. Disconnect injector connector.
3. Measure resistance between injector terminals 1 and 2.
4. Check that the resistance is within the specification.

Specification: Refer to “Specification”

Fuel System > Engine Control System > Idle Speed Control Actuator (ISCA) > Description and
Operation
Description
The Idle Speed Control Actuator (ISCA) is installed on the throttle body and controls the intake airflow that is bypassed around
the throttle plate to keep constant engine speed when the throttle valve is closed.
The function of the ISCA is to maintain idle speed according to various engine loads and conditions, and also to provide additional
air during starting.
The ISCA consists of an opening coil, a closing coil, and a permanent magnet. Based on information from various sensors, the
ECM controls both coils by grounding their control circuits. According to the control signals from the ECM, the valve rotor rotates

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 50 of 417

to control the by-pass airflow into the engine.

Fuel System > Engine Control System > Idle Speed Control Actuator (ISCA) > Specifications

cardiagn.com
Specification
Item Specification
Opening Coil Resistance
14.6 ~ 16.2 [20°C(68°F)]
(Ω)
Closing Coil Resistance
11.1 ~ 12.7 [20°C(68°F)]
(Ω)

Duty (%) Air Flow Rate (㎥/h)

15 0.8 ~ 1.8
35 6.3 ~ 10.3
70 35.5 ~ 45.0
96 49.0 ~ 59.0

Fuel System > Engine Control System > Idle Speed Control Actuator (ISCA) > Schematic
Diagrams
Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 51 of 417

Fuel System > Engine Control System > Idle Speed Control Actuator (ISCA) > Repair procedures
Inspection

cardiagn.com
1. Turn ignition switch OFF.
2. Disconnect ISCA connector.
3. Measure resistance between ISCA terminals 2 and 1 [Opening Coil].
4. Measure resistance between ISCA terminals 2 and 3 [Closing Coil].
5. Check that the resistance is within the specification.

Specification: Refer to “Specification”

Fuel System > Engine Control System > Purge Control Solenoid Valve (PCSV) > Description and
Operation
Description
Purge Control Solenoid Valve (PCSV) is a solenoid valve and is installed on the surge tank and controls the passage between the
canister and the intake manifold.
The evaporative gases gathered in the canister are delivered to the intake manifold when the PCSV is open by ECM control
signal.

Fuel System > Engine Control System > Purge Control Solenoid Valve (PCSV) > Specifications
Specification
Item Specification

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 52 of 417

Coil Resistance (Ω) 14.0 ~ 18.0 [20°C(68°F)]

Fuel System > Engine Control System > Purge Control Solenoid Valve (PCSV) > Schematic
Diagrams
Circuit Diagram

cardiagn.com
Fuel System > Engine Control System > Purge Control Solenoid Valve (PCSV) > Repair
procedures
Inspection
1. Turn ignition switch OFF.
2. Disconnect PCSV connector.
3. Measure resistance between PCSV terminals 1 and 2.
4. Check that the resistance is within the specification.

Specification: Refer to “Specification”

Fuel System > Engine Control System > CVVT Oil Control Valve (OCV) > Description and
Operation
Description
The Continuously Variable Valve Timing (CVVT) system controls the amount of valve overlap by varying the amount of oil flow
into an assembly mounted on the intake camshaft through ECM control of an oil control valve. An Oil Temperature Sensor (OTS)
is used to allow ECM monitoring of engine oil temperature. As oil is directed into the chambers of the CVVT assembly, the cam
phase is changed to suit various performance and emissions requirements.
1. When camshaft rotates engine rotation-wise: Intake-Advance / Exhaust-Retard
2. When camshaft rotates counter engine rotation-wise: Intake- Retard / Exhaust- Advance

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 53 of 417

Fuel System > Engine Control System > CVVT Oil Control Valve (OCV) > Specifications
Specification
Item Specification
Coil Resistance (Ω) 6.9 ~ 7.9 [20°C(68°F)]

Fuel System > Engine Control System > CVVT Oil Control Valve (OCV) > Schematic Diagrams
Circuit Diagram

cardiagn.com
Fuel System > Engine Control System > CVVT Oil Control Valve (OCV) > Repair procedures
Inspection
1. Turn the ignition switch OFF.
2. Disconnect the OCV connector.
3. Measure resistance between the OCV terminals 1 and 2.
4. Check that the resistance is within the specification.

Specification: Refer to “Specification”

Fuel System > Engine Control System > Canister Close Valve (CCV) > Description and Operation
Description
Canister Close Valve (CCV) is installed on the canister ventilation line. It seals evaporative emission control system by shutting
the canister from the atmosphere when leakage detecting system operates.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 54 of 417

Fuel System > Engine Control System > Canister Close Valve (CCV) > Specifications
Specification
Item Specification
Coil Resistance (Ω) 15.5 ~ 18.5 (20°C)

Fuel System > Engine Control System > Canister Close Valve (CCV) > Schematic Diagrams
Circuit Diagram

cardiagn.com
Fuel System > Engine Control System > Canister Close Valve (CCV) > Repair procedures
Inspection
1. Turn the ignition switch OFF.
2. Disconnect the CCV connector.
3. Measure resistance between the CCV terminal 5 and6.
4. Check that the resistance is within the specification.

Specification: Refer to "Specification"

5. Disconnect the vapor hose connected with the canister from the CCV.
6. Connect a vacuum pump to the nipple.
7. Ground the CCV control line and apply battery voltage to the CCV power supply line.
8. Apply vacuum and check the valve operation.

Specification: Vacuum maintained

Fuel System > Engine Control System > Troubleshooting

Inspection Chart For Diagnostic Trouble Codes (DTC)
DTC Description MIL
P0011 "A" Camshaft Position-Timing Over-Advanced or System Performance (Bank 1) ●
P0016 Crankshaft Position–Camshaft Position Correlation (Bank 1 / Sensor A) ●
P0030 HO2S Heater Control Circuit (Bank 1 / Sensor 1) ●
P0031 HO2S Heater Control Circuit Low (Bank 1 / Sensor 1) ●
P0032 HO2S Heater Control Circuit High (Bank 1 / Sensor 1) ●

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 55 of 417

P0036 HO2S Heater Control Circuit (Bank 1 / Sensor 2) ●

P0037 HO2S Heater Control Circuit Low (Bank 1 / Sensor 2) ●
P0038 HO2S Heater Control Circuit High (Bank 1 / Sensor 2) ●
P0076 Intake Valve Control Solenoid Circuit-Low (Bank 1) ●
P0077 Intake Valve Control Solenoid Circuit-High (Bank 1) ●
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ●
P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input ●
P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input ●
P0111 Intake Air Temperature Sensor 1 Circuit Range/Performance ●
P0112 Intake Air Temperature Sensor 1 Circuit Low Input ●
P0113 Intake Air Temperature Sensor 1 Circuit High Input ●
P0116 Engine Coolant Temperature Circuit Range/Performance ●
P0117 Engine Coolant Temperature Circuit Low Input ●
P0118 Engine Coolant Temperature Circuit High Input ●
P0121 Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance ●
P0122 Throttle/Pedal Position Sensor/Switch "A" Circuit Low Input ●
P0123 Throttle/Pedal Position Sensor/Switch "A" Circuit High Input ●

cardiagn.com
P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control ●
P0128 Coolant Thermostat (Coolant Temperature below Thermostat Regulating Temperature) ●
P0130 O2 Sensor Circuit (Bank 1 / Sensor 1) ●
P0131 O2 Sensor Circuit Low Voltage (Bank 1 / Sensor 1) ●
P0132 O2 Sensor Circuit High Voltage (Bank 1 / Sensor 1) ●
P0133 O2 Sensor Circuit Slow Response (Bank 1 / Sensor 1) ●
P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) ●
P0136 O2 Sensor Circuit (Bank 1 / Sensor 2) ●
P0137 O2 Sensor Circuit Low Voltage (Bank 1 / Sensor 2) ●
P0138 O2 Sensor Circuit High Voltage (Bank 1 / Sensor 2) ●
P0139 O2 Sensor Circuit Slow Response (Bank 1 / Sensor 2) ●
P0140 O2 Sensor Circuit No Activity Detected (Bank 1 / Sensor 2) ●
P0170 Fuel Trim (Bank 1) ●
P0171 System Too Lean (Bank 1) ●
P0172 System Too Rich (Bank 1) ●
P0196 Engine Oil Temperature Sensor-Range/Performance ●
P0197 Engine Oil Temperature Sensor Low Input ●
P0198 Engine Oil Temperature Sensor High Input ●
P0230 Fuel Pump Primary Circuit ▲
P0261 Cylinder 1 Injector Circuit Low ●
P0262 Cylinder 1 Injector Circuit High ●
P0264 Cylinder 2 Injector Circuit Low ●
P0265 Cylinder 2 Injector Circuit High ●
P0267 Cylinder 3 Injector Circuit Low ●
P0268 Cylinder 3 Injector Circuit High ●
P0270 Cylinder 4 Injector Circuit Low ●
P0271 Cylinder 4 Injector Circuit High ●
P0300 Random/Multiple Cylinder Misfire Detected ●

P0301

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 56 of 417

Cylinder 1-Misfire detected ●

P0302 Cylinder 2-Misfire detected ●
P0303 Cylinder 3-Misfire detected ●
P0304 Cylinder 4-Misfire detected ●
P0315 Crankshaft Position System Variation Not Learned ▲
P0325 Knock Sensor 1 Circuit (Bank 1 or Single Sensor) ●
P0335 Crankshaft Position Sensor "A" Circuit ●
P0340 Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor) ●
P0420 Catalyst System Efficiency below Threshold (Bank 1) ●
P0441 Evaporative Emission System Incorrect Purge Flow ●
P0442 Evaporative Emission System-Leak detected (Small Leak) ●
P0444 Evaporative Emission System-Purge Control Valve Circuit Open ●
P0445 Evaporative Emission System-Purge Control Valve Circuit Shorted ●
P0447 Evaporative Emission System-Vent Control Circuit Open ●
P0448 Evaporative Emission System-Vent Control Circuit Shorted ●
P0449 Evaporative Emission System-Vent Valve/Solenoid Circuit ●
P0451 Evaporative Emission System-Pressure Sensor Range/Performance ●

cardiagn.com
P0452 Evaporative Emission System-Pressure Sensor Low Input ●
P0453 Evaporative Emission System-Pressure Sensor High Input ●
P0454 Evaporative Emission System-Pressure Sensor Intermittent ●
P0455 Evaporative Emission System-Leak detected (Large Leak) ●
P0456 Evaporative Emission System-Leak detected (Very Small Leak) ●
P0501 Vehicle Speed Sensor "A" Range/Performance ●
P0505 Idle Air Control System ●
P0506 Idle Air Control System-RPM Lower than Expected ●
P0507 Idle Air Control System-RPM Higher than Expected ●
P0560 System Voltage ▲
P0562 System Voltage Low ●
P0563 System Voltage High ●
P0605 Internal Control Module Read Only Memory (ROM) Error ●
P0630 VIN Not Programmed or Incompatible-ECM/PCM ●
P0650 Malfunction Indicator Lamp (MIL) Control Circuit ▲
P0700 Transmission Control System (MIL Request) ●
P1505 Idle Speed Control Actuator Signal Low of Coil #1 ●
P1506 Idle Speed Control Actuator Signal High of Coil #1 ●
P1507 Idle Speed Control Actuator Signal Low of Coil #2 ●
P1508 Idle Speed Control Actuator Signal High of Coil #2 ●
U0001 High Speed CAN Communication Bus OFF ●
U0101 Lost Communication With TCM ●

●: MIL ON & Memory

▲: MIL OFF & Memory

Fuel System > Engine Control System > P0011 \'A\' Camshaft Position-Timing Over-Advanced or
System Performance (Bank 1)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 57 of 417

Component Location

General Description
The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the exhaust camshaft. There is no
variation in valve timing of the exhaust cam because the exhaust camshaft is driven by the timing belt. The timing of the intake
cam is varied by the relative operation the CVVT vane to the housing. The CVVT controller regulates the intake camshaft angle
using oil pressure through the OCV(Oil Control Valve). As result, the relative position between the camshaft and the crankshaft
becomes optimal, and the engine torque improves, fuel economy improves, exhaust emissions decrease by changing the valve
open/close timing of the intake camshaft.

cardiagn.com
DTC Description
The deviation of the camshaft position from the target point is evaluated during stable driving condition. The PCM accumulates
this deviation for a certain period and sets DTC P0011 when the accumulated deviation is too high. The target camshaft position
is predetermined value depending on engine speed and throttle angle in the PCM.

DTC Detecting Condition

Item Detecting Condition Possible Cause
• Monitor deviation between camshaft position setpoint and
case1
actual value
DTC
Strategy • Deviation between actual CAM position and CAM setpoint
case2 position in case of changing setpoint (slow response of
actuator)

• No relevant failure
• 11V < Battery voltage < 16V
• CVVT control : enabled
• Holding position adaptation not active
• Camshaft setpoint moved more than 5 times for this Driving
case1 Cycle
• Stable camshaft set-point moving by more than 1.125°CRK
moving • Faulty Oil leak
• Camshaft position setpoint-actual > 5°CRK • Faulty Oil pump
Enable • 600rpm < Engine speed < 5000rpm • Faulty Intake valve control
Conditions solenoid
• 20°C(68°F) < Engine oil temperature < 100°C(212°F)

• CVVT control active

• Camshaft set-point moving by more than 20°CRK
• Camshaft set-point moved more than 5 times since engine
start
case2
• 600 rpm < Engine speed < 5000 rpm
• 20 °C(68°F) < Oil temperature < 110 °C(230°F)
• No relevant failure
• 11V < Battery voltage < 16V

• Integral of Camshaft position setpoint - Camshaft position

case1
actual value > 150°CRK/sec.
Threshold

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 58 of 417

Value • CAM position movement < 2.6 °CRK within 0.7 sec. (with
case2
CAM set-point moving by 20 °CRK)

Diagnostic case1 • Approx. 38~300 seconds depending on CAM deviation

Time case2 • 350 sec.

Mil On Condition • 2 Driving Cycles

Specification
Intake OCV Normal Parameter
Insulation Resistance (Ω) Above 50 MΩ

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 59 of 417

cardiagn.com

Fig.1) Normal OCV (-) duty ratio with idle : Approx. 12~20%
Fig.2) Normal OCV (-) duty ratio with maintaining 2000RPM : Approx. 30~50%

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 60 of 417

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
■ Check OCV and Filter
1. Check resistance of OCV
(1) Ignition "OFF"
(2) Disconnect intake OCV connector.
(3) Measure resistance between terminals 1 and 2 of the intake OCV connector.(Component side)

Specification : Approx. 6.9~7.9Ω at 20°C(68°F)

(4) Is resistance within the specification?

▶ Go to next step as below

▶ Replace OCV and then go to "Verification of Vehicle Repair" procedure

2. Check operation of OCV

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 61 of 417

(1) Start the engine and let it idle.

(2) With OCV connector still disconnected, connect 12V and a ground to 2 and 1 of the OCV(Component side).
Specification :

Test Condition Disconnect OCV connector Apply battery voltage

Normal Value Normal engine speed Rough idle or engine stall

(3) Has a problem been found?

▶ Go to next step as below.

▶ Go to "Check CVVT(Continuously Variable Valve Timing) Assembly" procedure.

3. Check OCV and Filter

(1) Ignition"OFF"
(2) Check OCV filter for sticking or contamination.
(3) Remove the OCV and visually check the spool column of OCV for contamination.
(4) Has a problem been found?

▶ Clean or replace as necessary and then go to "Verification of Vehicle Repair" procedure .

▶ Go to next step as below.

cardiagn.com
(5) Apply 12V and a ground to 2 and 1 terminals of the OCV(Component side).
(6) Verify that a "clicking" sound is heard when applying the battery voltage.
(7) Repeat this procedure 4 or 5 times to ensure intake OCV reliability.

(8) Is OCV working properly?

▶ Go to next step as below

▶ Check OCV for contamination, deterioration, or damage. Substitute with a known-good OCV and
check for proper operation. If the problem is corrected, replace OCV and then go to "Verification of
Vehicle Repair" procedure.

■ Check CVVT(Continuously Variable Valve Timing) Assembly

1. Remove the CVVT assembly. Refer to "Removal Procedure" in Workshop Manual.
2. Check that the CVVT assembly is locked.
3. The one of the 2 holes on the cam journal is for advances(upper) and the rest is for retards(lower). Apply masking tape to all
oil path holes except the one advance hole("B") indicated by the arrow as shown in the figure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 62 of 417

4. To release the CVVT lock pin, wrap some tape around the tip of an air pressure adapter and apply low air pressure of approx.
150kPa(1.5kg/cm², 21 psi) to the exposed camshaft port. Wrap a shop towel or rag around the CVVT because residual oil may
leak out of the unit when applying air pressure.
5. With low air pressure applied, turn the CVVT to the ADVANCE direction as indicated in the figure.

If too much air leaks when applying the low air pressure, the CVVT lock pin may not release and the CVVT may not turn.

cardiagn.com
6. Allow the CVVT assembly to move in the ADVANCE and DELAY directions to ensure there is no binding and that it moves
freely.(Movable smoothly in the range about 20°)
7. Turn the CVVT by hand and make sure it locks in the maximum delay angle position.
8. Is CVVT assembly working properly?

▶ Go to next step as below

▶ Replace the CVVT assembly and go to "Verification of Vehicle Repair" procedure

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check valve timing. Refer to "P0016: Crankshaft Position-Camshaft Position Correlation(Bank1)"

procedure. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 63 of 417

4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure..

Fuel System > Engine Control System > P0016 Crankshaft Position–Camshaft Position
Correlation (Bank 1 Sensor A)
Component Location

cardiagn.com
General Description
The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the exhaust camshaft. There is no
variation in valve timing of the exhaust cam because the exhaust camshaft is driven by the timing belt. The timing of the intake
cam is varied by the relative operation the CVVT vane to the housing. The CVVT controller regulates the intake camshaft angle
using oil pressure through the OCV(Oil Control Valve). As result, the relative position between the camshaft and the crankshaft
becomes optimal, and the engine torque improves, fuel economy improves, exhaust emissions decrease by changing the valve
open/close timing of the intake camshaft.

DTC Description
This diagnosis checks the camshaft position plausibility whether the expected range plus some margin is not violated that might
be caused by a wrong engine repair, or a chain/belt misalignment. DTC P0016 is set when actual camshaft position is too much
retarded or advanced than full retard position or full advance position. To continue the adjustment in such case could lead to a
damage of the engine by hitting the valves with the piston.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Check Camshaft Signal Switching

• 6V < Battery voltage < 16V

Enable Conditions • Abnormal installation of camshaft
• CVVT control state : Full retard postion or Control
• Abnormal installation of
• Camshaft switching out of 109 ~ 141° CRK in full retard crankshaft
Threshold Value
position, 70° ~ 140° CRK during CVVT control • Abnormal installation of tone
wheel
Diagnostic Time • 8 Sec.
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 64 of 417

cardiagn.com
Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 65 of 417

cardiagn.com
Fig.1) The square wave signal should be smooth and without any distortion.
Fig.2)The CMPS falling(rising) edge is coincided with 3rd~5th tooth of the CKP from one longer signal(missing tooth)

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 66 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Timing Inspection
(1) With ignition "OFF", set up an oscilloscope as follows :
Channel A (+): terminal 2 of the CKPS(back probe), (-): ground
Channel B (+): terminal 2 of the CMPS(back probe), (-): ground
(2) Start the engine and check for signal waveform whether synchronize with camshaft sensor or not and tooth is missing refer
to sample waveforms as below.

cardiagn.com

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 67 of 417

cardiagn.com
Fig.1) The square wave signal should be smooth and without any distortion.
Fig.2) The CMPS falling(rising) edge is coincided with 3rd~5th tooth of the CKP from one longer signal(missing tooth)
(3) Is the signal waveform normal?

▶ Go to next step as below

▶ Check that the crankshaft and camshaft are correctly aligned the matching marks of the pulleys for
the followings.
• Alignment of the timing belt
• Alignment of the camshaft timing chainReadjust or repair as necessary and go to "Verification of
Vehicle Repair" procedure

■ Check OCV and Filter

1. Check operation of OCV
(1) Ignition "OFF"
(2) Disconnect intake OCV connector.
(3) Start the engine and let it idle.
(4) With OCV connector still disconnected, connect 12V and a ground to 2 and 1 of the OCV(Component side).
Specification :

Test Condition Disconnect OCV connector Apply battery voltage

Normal Value Normal engine speed Rough idle or engine stall

(5) Has a problem been found?

▶ Go to next step as below.

▶ Go to "Check CVVT(Continuously Variable Valve Timing) Assembly" procedure.

2. Check OCV and Filter

(1) Ignition"OFF"

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 68 of 417

(2) Check OCV filter for sticking or contamination.

(3) Remove the OCV and visually check the spool column of OCV for contamination
(4) Has a problem been found?

▶ Clean or replace as necessary and then go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

(5) Apply 12V and a ground to 2 and 1 terminals of the OCV(Component side).
(6) Verify that a "clicking" sound is heard when applying the battery voltage.
(7) Repeat this procedure 4 or 5 times to ensure intake OCV reliability.

cardiagn.com
(8) Is OCV working properly?

▶ Go to next step as below

▶ Check OCV for contamination, deterioration, or damage. Substitute with a known-good OCV and
check for proper operation. If the problem is corrected, replace OCV and then go to "Verification of
Vehicle Repair" procedure

■ Check CVVT(Continuously Variable Valve Timing) Assembly

1. Remove the CVVT assembly. Refer to "Removal Procedure" in Workshop Manual
2. Check that the CVVT assembly is locked.
3. The one of the 2 holes on the cam journal is for advances(upper) and the rest is for retards(lower). Apply masking tape to all
oil path holes except the one advance hole("B") indicated by the arrow as shown in the figure.

4. To release the CVVT lock pin, wrap some tape around the tip of an air pressure adapter and apply low air pressure of approx.
150kPa(1.5kg/cm², 21 psi) to the exposed camshaft port. Wrap a shop towel or rag around the CVVT because residual oil may
leak out of the unit when applying air pressure.
5. With low air pressure applied, turn the CVVT to the ADVANCE direction as indicated in the figure.

If too much air leaks when applying the low air pressure, the CVVT lock pin may not release and the CVVT may not turn.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 69 of 417

6. Allow the CVVT assembly to move in the ADVANCE and DELAY directions to ensure there is no binding and that it moves
freely.(Movable smoothly in the range about 20°)
7. Turn the CVVT by hand and make sure it locks in the maximum delay angle position.
8. Is CVVT assembly working properly?

▶ Go to next step as below.

▶ Replace the CVVT assembly and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

cardiagn.com
1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0030 HO2S Heater Control Circuit (Bank 1 / Sensor 1)
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 70 of 417

General Description
The normal operating temperature of the HO2S(Heated Oxygen Sensor) ranges from 350 to 850°C(662 to 1562°F). The HO2S
heater greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width
modulated control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the
current in the circuit is high. On the contrary, if the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description
The PCM determines if a front HO2S heater fault has occurred and sets DTC P0030 if the front HO2S heater control driver inside

cardiagn.com
the PCM fails, if HO2S is not operational (after an elapse of predetermined time) since engine start, or when the front HO2S tip
temperature is out of normal working range.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Evaluate O2 sensor element temperature via measuring
element resistance

• 11 < Battery voltage < 16V

• Dewpoint exceeded
• No relevant failure • Related fuse blown or missing
Enable Conditions
• Time after start elapsed:240 sec. • Heater control circuit open or
• 1% < Heater power < 99% short
• Exhaust gas Temp. model < 650°C • Power supply circuit open or
short
• Element resistance > 2100 Ω (Element temperature < 500°
Threshold Value • Contact resistance in connectors
C)
• Faulty HO2S
Diagnostic Time • 5 min.
Mil On Condition • 2 Driving Cycles

• EVAP. emission control function is controlled in minimum

Fail Safe
operation mode

Specification
Temp.(°C) Temp.(°F) Heater Resistance (Ω)
18~20 64~82 Approx. 9

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 71 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 72 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Power Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S connector
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of HO2S(B1/S1) heater harness connector and chassis ground.

Specification : B+

5. Is voltage display near the specified value?

▶ Go to "Control Circuit Inspection" procedure

cardiagn.com
▶ Check for an open in the power supply circuit between the main relay and the HO2S. Especially check
for "10A Sensor fuse" is installed and not blown. Repair as necessary and go to "Verification of Vehicle
Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Control Circuit Inspection

1. Measure voltage between control terminal of HO2S(B1/S1) heater harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to "Component Inspection" procedure.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 73 of 417

2. Measure resistance between power and control terminals of HO2S(B1/S1) heater(Component Side).
Specification :

Temp.(°C) Temp.(°F) Heater Resistance (Ω)

18~20 64~82 Approx. 9

3. Is HO2S heater resistance display near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .

cardiagn.com
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0031 HO2S Heater Control Circuit Low (Bank 1 /
Sensor 1)
Component Location

General Description
The normal operating temperature of the HO2S(Heated Oxygen Sensor) ranges from 350 to 850°C(662 to 1562°F). The HO2S
heater greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width
modulated control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the
current in the circuit is high. On the contrary, if the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description
PCM sets DTC P0031 if the PCM detects that the front HO2S heater control circuit is short to ground.

DTC Detecting Condition

Item Detecting Condition Possible Cause

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 74 of 417

DTC Strategy • Electrical Check

• Related fuse blown or missing
• 10V < Battery voltage < 16V
Enable Conditions • Open or short to ground in power
• 1.2% < Heater power < 99%
supply or control harness
Threshold Value • Short to ground • Poor connection or damaged
harness
Diagnostic Time • 10 sec.
• Faulty HO2S
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Heater Resistance (Ω)
18~20 64~82 Approx. 9

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 75 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Power Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of the HO2S heater harness connector and chassis ground.

Specification : B+

5. Is voltage display near the specified value?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for an open in the power supply circuit between the main relay and the HO2S. Especially check
for "15A Sensor fuse" is installed and not blown. Repair as necessary and go to "Verification of Vehicle
Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Control Circuit Inspection

1. Measure voltage between control terminal of the HO2S heater harness connector and chassis ground.
2. Is voltage display near the specified value?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 76 of 417

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"

cardiagn.com
2. Measure resistance between power and control terminals of HO2S(B1/S1) heater(Component Side).
Specification :

Temp.(°C) Temp.(°F) Heater Resistance (Ω)

18~20 64~82 Approx. 9

3. Is HO2S heater resistance display near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0032 HO2S Heater Control Circuit High (Bank 1 /
Sensor 1)
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 77 of 417

General Description
The normal operating temperature of the HO2S(Heated Oxygen Sensor) ranges from 350 to 850°C(662 to 1562°F). The HO2S
heater greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width
modulated control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the
current in the circuit is high. On the contrary, if the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description
PCM sets DTC P0032 if the PCM detects that the front HO2S heater control line is open or short to battery circuit.

cardiagn.com
DTC Detecting Condition
Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check

• 10V < Battery voltage < 16V • Open or short to battery in control
Enable Conditions
• 1% < Heater power < 99% harness
• Poor connection or damaged
Threshold Value • Short to Battery or Line break
harness
Diagnostic Time • 10 sec. • Faulty HO2S
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Heater Resistance (Ω)
18~20 64~82 Approx. 9

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 78 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 79 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Control Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between control terminal of the HO2S heater harness connector and chassis ground.

Specification : Approx. 4~5V

5. Is voltage within the specification?

▶ Go to next step as below

cardiagn.com
▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Measure resistance between power and control terminals of HO2S(B1/S1) heater(Component Side).
Specification :

Temp.(°C) Temp.(°F) Heater Resistance (Ω)

18~20 64~82 Approx. 9

3. Is HO2S heater resistance display near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 80 of 417

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure..

Fuel System > Engine Control System > P0036 HO2S Heater Control Circuit (Bank 1 / Sensor 2)
Component Location

cardiagn.com
General Description
The normal operating temperature of the HO2S(Heated Oxygen Sensor) ranges from 350 to 850°C(662 to 1562°F). The HO2S
heater greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width
modulated control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the
current in the circuit is high. On the contrary, if the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description
The PCM determines when a rear HO2S heater fault occurs and sets DTC P0036 if measured rear HO2S resistance is lower than
the predetermined threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
• Evaluate O2 sensor element temperature via measuring
DTC Strategy
element resistance

• HO2S sensor pre-heating phase finished

• Related fuse blown or missing
• 1% < Heater PWM < 99%
• Heater control circuit open or
• Time after start elapsed:240 sec.
Enable Conditions short
• 11V<Battery voltage<16V
• Power supply circuit open or
• Exhaust gas temp.model<650°C(1,202°F) short
• No relevant failure • Poor connection or damaged
• HO2S Element Resistance > 1100 Ohm (Catalyst harness
Threshold Value
Temperature < 550°C(1022°F)) • Faulty HO2S

Diagnostic Time • 5 min.

Mil On Condition • 2 Driving Cycles

Specification

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 81 of 417

Temp.(°C) Temp.(°F) Heater Resistance (Ω)

18~20 64~82 Approx. 9

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 82 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Power Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S sensor connector
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of the HO2S heater harness connector and chassis ground.

Specification : B+

5. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for an open in the power supply circuit between the main relay and the HO2S. Especially check
for "SENSOR2 FUSE 15A" is installed and not blown. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Control Circuit Inspection

1. Measure voltage between control terminal of the HO2S heater harness connector and chassis ground.

Specification : Approx. 4~5V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 83 of 417

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

cardiagn.com
Component Inspection
1. Ignition "OFF"
2. Measure resistance between power terminal and control terminal of the sensor connector (Component side)
Specification :

Temp.(°C) Temp.(°F) Heater Resistance (Ω)

18~20 64~82 Approx. 9

3. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure..

Fuel System > Engine Control System > P0037 HO2S Heater Control Circuit Low (Bank 1 /
Sensor 2)
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 84 of 417

General Description
The normal operating temperature of the HO2S(Heated Oxygen Sensor) ranges from 350 to 850°C(662 to 1562°F). The HO2S
heater greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width
modulated control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the
current in the circuit is high. On the contrary, if the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description
PCM sets DTC P0037 if the PCM detects that the rear HO2S heater control line is short to ground.

cardiagn.com
DTC Detecting Condition
Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check
• Related fuse blown or missing
• 10V < Battery voltage < 16V
Enable Conditions • Open or short to ground in power
• 1% < Heater PWM < 99%
supply or control harness
Threshold Value • Short to ground • Poor connection or damaged
harness
Diagnostic Time • 10 sec.
• Faulty HO2S
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Heater Resistance (Ω)
18~20 64~82 Approx. 9

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 85 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 86 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Power Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of the HO2S heater harness connector and chassis ground.

Specification : B+

5. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

cardiagn.com
▶ Check for an open in the power supply circuit between the main relay and the HO2S. Especially check
for "SENSOR2 FUSE 15A" is installed and not blown. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Control Circuit Inspection

1. Measure voltage between control terminal of the HO2S heater harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 87 of 417

1. Ignition "OFF"
2. Measure resistance between power terminal and control terminal of the sensor connector (Component side)
Specification :

Temp.(°C) Temp.(°F) Heater Resistance (Ω)

18~20 64~82 Approx. 9

3. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .

cardiagn.com
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0038 HO2S Heater Control Circuit High (Bank 1 /
Sensor 2)
Component Location

General Description
The normal operating temperature of the HO2S(Heated Oxygen Sensor) ranges 350 to 850°C(662 to 1562°F). The HO2S heater
greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width modulated
control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the current in
the circuit is high. On the contrary, the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description
PCM sets DTC P0038 if the PCM detects that the rear HO2S heater control line is open or short to battery line.

DTC Detecting Condition

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 88 of 417

Item Detecting Condition Possible Cause

DTC Strategy • Electrical Check

• 10V < Battery voltage < 16V • Open or short to battery in control
Enable Conditions
• 1% < Heater PWM < 99% harness
• Poor connection or damaged
Threshold Value • Short to Battery or Line break
harness
Diagnostic Time • 10 sec. • Faulty HO2S
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Heater Resistance (Ω)
18~20 64~82 Approx. 9

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 89 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Control Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S sensor connector
3. Ignition "ON" & Eng. "OFF"
4. Measure voltage between control terminal of the HO2S heater harness connector and chassis ground.

Specification : Approx. 4~5V

5. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 90 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Measure resistance between power terminal and control terminal of the sensor connector (Component side)
Specification :

Temp.(°C) Temp.(°F) Heater Resistance (Ω)

18~20 64~82 Approx. 9

3. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

cardiagn.com
Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0076 Intake Valve Control Solenoid Circuit-Low (Bank
1)
Component Location

General Description
The CVVT (Continuously Variable Valve Timing) system built on the camshaft helps the engine decrease the exhaust gas and
increase engine power and fuel economy by changing the valve open/close timing of the intake camshaft continuously. The intake
valve control solenoid, the main control part of the CVVT, changes the direction of the oil path through the CVVT by the duty

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 91 of 417

control of the PCM and changes the open and close timing of the intake and exhaust valves.

DTC Description
PCM sets DTC P0076 if the PCM detects that the intake valve control solenoid control circuit is short to ground.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check
• Short to ground in control circuit
Enable Conditions • 10V < Battery voltage < 16V
• Poor connection or damaged
Threshold Value • Short to ground harness
Diagnostic Time • Faulty Intake Valve Control
• 2 seconds
Solenoid
Mil On Condition • 2 Driving Cycles

Specification
Oil Control Valve Normal Parameter At 20°C (68°F)
Insulation Resistance Above 50MΩ

cardiagn.com
Temp.(°C) Temp.(°F) Resistance(Ω) Temp.(°C) Temp.(°F) Resistance(Ω)
0 32 6.2 ~ 7.4 60 140 8.0 ~ 9.2
10 50 6.5 ~ 7.7 70 158 8.3 ~ 9.5
20 68 6.9 ~ 7.9 80 176 8.6 ~ 9.8
30 86 7.1 ~ 8.3 90 194 8.9 ~ 10.1
40 104 7.4 ~ 8.6 100 212 9.2 ~ 10.4
50 122 7.7 ~ 8.9

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 92 of 417

cardiagn.com
Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 93 of 417

cardiagn.com
Fig.1) Normal OCV (-) duty ratio with idle : Approx. 12~20%
Fig.2) Normal OCV (-) duty ratio with maintaining 2000RPM : Approx. 30~50%

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 94 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect oil control valve connector
3. Measure resistance between power terminal and control terminal of the solenoid connector(Component side).
Specification :

Temp.(°C) Temp.(°F) Resistance(Ω)

0 32 6.2 ~ 7.4

cardiagn.com
10 50 6.5 ~ 7.7
20 68 6.9 ~ 7.9
30 86 7.1 ~ 8.3
40 104 7.4 ~ 8.6
50 122 7.7 ~ 8.9
60 140 8.0 ~ 9.2
70 158 8.3 ~ 9.5
80 176 8.6 ~ 9.8
90 194 8.9 ~ 10.1
100 212 9.2 ~ 10.4

4. Is resistance within specification?

▶ Go to next step as below.

▶ Check oil control valve for contamination, deterioration, or damage. Substitute with a known-good
solenoid and check for proper operation. If the problem is corrected, replace solenoid and then go to
"Verification of Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of the oil control valve harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Repair open or short to ground in the power supply circuit and go to "Verification of Vehicle Repair"
procedure.

Control circuit inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 95 of 417

1. Measure voltage between terminal 1 of the oil control valve harness connector and chassis ground.

Specification : Approx. 3~4V

Signal waveform in control circuit with ignition ON & Engine OFF

2. Is voltage within specification?

▶ Go to "Terminal and Connector Inspection" procedure.

▶ Repair short to ground in control circuit and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken

cardiagn.com
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0077 Intake Valve Control Solenoid Circuit-High (Bank
1)
Component Location

General Description
The CVVT (Continuously Variable Valve Timing) system built on the camshaft helps the engine decrease the exhaust gas and

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 96 of 417

increase engine power and fuel economy by changing the valve open/close timing of the intake camshaft continuously. The intake
valve control solenoid, the main control part of the CVVT, changes the direction of the oil path through the CVVT by the duty
control of the PCM and changes the open and close timing of the intake and exhaust valves.

DTC Description
PCM sets DTC P0077 if the PCM detects that the OCV control circuit is open or short to battery.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check
• Open or short to battery in control
Enable Conditions • 10V < Battery voltage < 16V circuit
• Poor connection or damaged
Threshold Value • Short to battery or Line break
harness
Diagnostic Time • 2 seconds • Faulty Intake Valve Control
Solenoid
Mil On Condition • 2 Driving Cycles

Specification
Oil Control Valve Normal Parameter At 20°C (68°F)

cardiagn.com
Insulation Resistance Above 50MΩ

Temp.(°C) Temp.(°F) Resistance(Ω) Temp.(°C) Temp.(°F) Resistance(Ω)

0 32 6.2 ~ 7.4 60 140 8.0 ~ 9.2
10 50 6.5 ~ 7.7 70 158 8.3 ~ 9.5
20 68 6.9 ~ 7.9 80 176 8.6 ~ 9.8
30 86 7.1 ~ 8.3 90 194 8.9 ~ 10.1
40 104 7.4 ~ 8.6 100 212 9.2 ~ 10.4
50 122 7.7 ~ 8.9

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 97 of 417

cardiagn.com
Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 98 of 417

cardiagn.com
Fig.1) Normal OCV (-) duty ratio with idle : Approx. 12~20%
Fig.2) Normal OCV (-) duty ratio with maintaining 2000RPM : Approx. 30~50%

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 99 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect oil control valve connector
3. Measure resistance between power terminal and control terminal of the solenoid connector(Component side).
Specification :

Temp.(°C) Temp.(°F) Resistance(Ω)

0 32 6.2 ~ 7.4

cardiagn.com
10 50 6.5 ~ 7.7
20 68 6.9 ~ 7.9
30 86 7.1 ~ 8.3
40 104 7.4 ~ 8.6
50 122 7.7 ~ 8.9
60 140 8.0 ~ 9.2
70 158 8.3 ~ 9.5
80 176 8.6 ~ 9.8
90 194 8.9 ~ 10.1
100 212 9.2 ~ 10.4

4. Is resistance within specification?

▶ Go to next step as below.

▶ Check oil control valve for contamination, deterioration, or damage. Substitute with a known-good
solenoid and check for proper operation. If the problem is corrected, replace solenoid and then go to
"Verification of Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of the oil control valve harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Repair open or short to ground in the power supply circuit and go to "Verification of Vehicle Repair"
procedure.

Control circuit inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 100 of 417

1. Measure voltage between terminal 1 of the oil control valve harness connector and chassis ground.

Specification : Approx. 3~4V

Signal waveform in control circuit with ignition ON & Engine OFF

2. Is voltage within specification?

▶ Go to "Terminal and Connector Inspection" procedure.

▶ Repair short to ground in control circuit and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken

cardiagn.com
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0106 Manifold Absolute Pressure/Barometric Pressure
Circuit Range/Performance
Component Location

General Description
The amount of intake air flow must be inputted to PCM in order to determine the fuel injection quantity. MAPS(Manifold Absolute

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 101 of 417

Pressure) calculates the amount of air indirectly as measuring the pressure inside of intake manifold. This mechanism is also
called Speed-Density Type. MAPS transfers analog output signal which is proportional to the change of intake manifold pressure,
then, with this signal and RPM, PCM calculates the amount of intake air flow. MAPS is mounted on surge tank to measure the
pressure inside of intake manifold, and it consists of a piezo electric element and hybrid IC which amplifies output signal from the
element. A piezo electric element is a sort of a diaphragm using piezo electric effect. One side of the diaphragm is surrounded
with vacuum chamber while intake pressure is applied to the other side. Thus, signals are outputted by the transformation of
diagphragm according to the change of pressure inside of intake manifold.

DTC Description
PCM compares the MAPS output and calculated MAPS value while enable condition is met. If the acutal MAP value is higher
than Maximum threshold or lower than Minimum threshold for a pre-determined time, PCM determines that a fault exists and a
DTC is stored.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Plausability check

• No relevant failure
• Dirty air cleaner.
Enable Conditions • 11 V≤ Battery voltage ≤ 16V
• Oil Cap or Dipstick missing or not
• Lambda close loop control activated installed correctly.
• Difference between model pressure and measured • Air leak in intake system
Threshold Value
pressure > 280hpa • Contact resistance in connectors.

cardiagn.com
Diagnostic Time • Faulty MAPS or TPS
• 200 revolutions
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 102 of 417

cardiagn.com
As often as possible, the MAPS signal should be compared with the TPS signal. Check whether the MAPS and TPS signals
increase at the same time when accelerating. During acceleration, the MAPS output voltage increases; during deceleration, the
MAPS output voltage decreases.

Monitor DTC Status

If any DTCs relating to TPS or MAFS are stored, do ALL REPAIRS associated with those codes before proceeding with
further troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 103 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Terminal & Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Voltage Inspection
1. IG "OFF".
2. Disconnect MAPS connector.
3. IG "ON" & ENG "OFF".
4. Measure voltage between each of signal / power / ground terminals of MAPS harness connector and chassis ground.

Specification : MAP signal terminal : Approx. 5V

Power terminal : Approx. 5V
Ground terminal : Below 0V

5. Is the measured voltage within specification ?

▶ Go to "Component Inspection " procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 104 of 417

▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

Component Inspection
1. Check MAPS performance.
(1) IG "OFF".
(2) Connnect CH A probe to signal terminal of MAPS and CH B probe to signal terminal of TPS connector.
(3) Warm up the engine to normal operating temperature.
(4) Measure signal waveform of MAPS and TPS together by stepping on and off the accellerator pedal.
Specification :

Pressure (kPa) Voltage(V)

Approx. 20 Approx. 0.7~0.8
Approx. 35 Approx. 1.3~1.4
Approx. 60 Approx. 2.3~2.4
Approx. 95 Approx. 3.7~3.8
Approx. 101 Approx. 3.9~4.1

(5) Is the measured signal waveform(Comparison response of TPS with MAPS) O.K ?

cardiagn.com
▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination,
deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Substitute with a known - good MAPS and check for proper operation. If the problem is corrected,
replace MAPS and go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0107 Manifold Absolute Pressure/Barometric Pressure
Circuit Low Input
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 105 of 417

General Description
The amount of intake air flow must be inputted to PCM in order to determine the fuel injection quantity. MAPS(Manifold Absolute
Pressure) calculates the amount of air indirectly as measuring the pressure inside of intake manifold. This mechanism is also
called Speed-Density Type. MAPS transfers analog output signal which is proportional to the change of intake manifold pressure,
then, with this signal and RPM, PCM calculates the amount of intake air flow. MAPS is mounted on surge tank to measure the
pressure inside of intake manifold, and it consists of a piezo electric element and hybrid IC which amplifies output signal from the
element. A piezo electric element is a sort of a diaphragm using piezo electric effect. One side of the diaphragm is surrounded
with vacuum chamber while intake pressure is applied to the other side. Thus, signals are outputted by the transformation of

cardiagn.com
diagphragm according to the change of pressure inside of intake manifold.

DTC Description
If sensor signal input is lower than 0.25V during 5 sec, PCM sets DTC P0107.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage Range Check
• Poor connection
• 10 < Battery voltage < 16
Enable Conditions • Open or short to ground in power
• Engine speed > 544rpm circuit
Threshold Value • Sensor voltage < 0.1 V • Short to ground in signal circuit
• MAPS
Diagnostic Time • 0.1 sec
• PCM
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 106 of 417

cardiagn.com
Signal Waveform & Data

As often as possible, the MAPS signal should be compared with the TPS signal. Check whether the MAPS and TPS signals
increase at the same time when accelerating. During acceleration, the MAPS output voltage increases; during deceleration, the
MAPS output voltage decreases.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 107 of 417

Monitor DTC Status

If any DTCs relating to TPS or MAFS are stored, do ALL REPAIRS associated with those codes before proceeding with
further troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Terminal & Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Power Circuit Inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 108 of 417

1. IG "OFF".
2. Disconnect MAPS connector.
3. IG "ON" & ENG "OFF"
4. Measure the voltage between power terminal of MAPS harness connector and chassis ground.

Specification : Approx. 5V

5. Is the measured voltage within specification ?

▶ Go to "Signal Circuit Inspection " procedure.

▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

1. Measure the voltage between signal terminal of MAPS harness connector and chassis ground.

Specification : Approx. 5V

2. Is the measured voltage within specification ?

▶ Go to "Component Inspection" procedure.

▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

cardiagn.com
Component Inspection
1. Check MAPS performance.
(1) IG "OFF".
(2) Connnect CH A probe to signal terminal of MAPS and CH B probe to signal terminal of TPS connector.
(3) Warm up the engine to normal operating temperature.
(4) Measure signal waveform of MAPS and TPS together by stepping on and off the accellerator pedal.
Specification :

Pressure (kPa) Voltage(V)

Approx. 20 Approx. 0.7~0.8
Approx. 35 Approx. 1.3~1.4
Approx. 60 Approx. 2.3~2.4
Approx. 95 Approx. 3.7~3.8
Approx. 101 Approx. 3.9~4.1

(5) Is the measured signal waveform(Comparison response of TPS with MAPS) O.K ?

▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination,
deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Substitute with a known - good MAPS and check for proper operation. If the problem is corrected,
replace MAPS and go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 109 of 417

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0108 Manifold Absolute Pressure/Barometric Pressure
Circuit High Input
Component Location

cardiagn.com
General Description
The amount of intake air flow must be inputted to PCM in order to determine the fuel injection quantity. MAPS(Manifold Absolute
Pressure) calculates the amount of air indirectly as measuring the pressure inside of intake manifold. This mechanism is also
called Speed-Density Type. MAPS transfers analog output signal which is proportional to the change of intake manifold pressure,
then, with this signal and RPM, PCM calculates the amount of intake air flow. MAPS is mounted on surge tank to measure the
pressure inside of intake manifold, and it consists of a piezo electric element and hybrid IC which amplifies output signal from the
element. A piezo electric element is a sort of a diaphragm using piezo electric effect. One side of the diaphragm is surrounded
with vacuum chamber while intake pressure is applied to the other side. Thus, signals are outputted by the transformation of
diagphragm according to the change of pressure inside of intake manifold.

DTC Description
If sensor signal input is higher than 4.88V during 5 sec, PCM sets DTC P0108.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage Range Check • Poor connection
Enable Conditions • 10 < Battery voltage < 16 • Open or short to power in signal
circuit
Threshold Value • Sensor voltage > 4.35V
• Open in ground circuit
Diagnostic Time • 0.1 sec • MAPS
Mil On Condition • 2 Driving Cycles • PCM

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 110 of 417

cardiagn.com
Signal Waveform & Data

As often as possible, the MAPS signal should be compared with the TPS signal. Check whether the MAPS and TPS signals
increase at the same time when accelerating. During acceleration, the MAPS output voltage increases; during deceleration, the
MAPS output voltage decreases.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 111 of 417

Monitor DTC Status

If any DTCs relating to TPS or MAFS are stored, do ALL REPAIRS associated with those codes before proceeding with
further troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Terminal & Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Signal Circuit Inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 112 of 417

1. Check short to battery in harness.

(1) IG "OFF".
(2) Disconnect MAPS and PCM connector.
(3) IG "ON" & Eng. "OFF"
(4) Measure the voltage between signal terminal of the MAPS harness connector and chassis ground.

Specification : 0V

(5) Is the measured voltage within specification ?

▶ Go to next step as below.

▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

Ground Circuit Inspection

1. IG "OFF".
2. Measure the resistance between ground terminal of MAPS harness connector and chassis ground.

Specification : Below 1Ω

3. Is the measured resistance within specification ?

cardiagn.com
▶ Go to next step as below.

▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

Component Inspection
1. Check MAPS performance.
(1) IG "OFF".
(2) Connnect CH A probe to signal terminal of MAPS and CH B probe to signal terminal of TPS connector.
(3) Warm up the engine to normal operating temperature.
(4) Measure signal waveform of MAPS and TPS together by stepping on and off the accellerator pedal.
Specification :

Pressure (kPa) Voltage(V)

Approx. 20 Approx. 0.7~0.8
Approx. 35 Approx. 1.3~1.4
Approx. 60 Approx. 2.3~2.4
Approx. 95 Approx. 3.7~3.8
Approx. 101 Approx. 3.9~4.1

(5) Is the measured signal waveform(Comparison response of TPS with MAPS) O.K ?

▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination,
deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Substitute with a known - good MAPS and check for proper operation. If the problem is corrected,
replace MAPS and go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 113 of 417

3. Read "DTC Status" parameter .

4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0111 Intake Air Temperature Sensor 1 Circuit Range /
Performance
Component Location

cardiagn.com
General Description
The Intake Air Temperature Sensor (IATS) is installed into the Mass Air Flow Sensor (MAFS). The IATS uses a thermistor whose
resistance changes with the temperature. The electrical resistance of the IATS decreases as the temperature increases, and
increases as the temperature decreases. The 5 V power source in the PCM is supplied to the IATS via a resistor in the PCM.
That is, the resistor in the PCM and the thermistor in the IATS are connected in series. When the resistance value of the
thermistor in IATS changes according to the intake air temperature, the signal voltage also changes. Using this signal, the
information of the intake air temperature, the PCM corrects basic fuel injection duration and ignition timing.

DTC Description
The purpose of this diagnosis is to detect a stuck intake air temperature signal. The diagnostic function checks whether after a
variation of the calculated intake air temperature also a variation of the measured intake air temperature is detected.PCM sets
DTC P0111 when the variation of measured intake air temperature from engine start is smaller than threshold while variation of
calculated intake air temperature by PCM is greater than threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Check intake air temperature signal stuck.

• Time after engine start > 300sec.

• Coolant temp. > 76°C(168.8°F)
• Coolant temp. increasing after start > 40°C(104°F)
Enable Conditions
• Accumulated time for vehicle speed > 70km/h(44mph) for • Contact resistance in connections
more than 100sec.
• Faulty IAT sensor
• No relevant failure

Threshold Value • Intake air temperature signal stuck.

Diagnostic Time • 5 sec.
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance(kΩ) Temp.(°C) Temp.(°F) Resistance(kΩ)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 114 of 417

-10 14 8.5~9.7 20 68 2.3~2.5

0 32 5.4~6.1 30 86 1.6~1.7
10 50 3.5~3.9 80 176 Approx. 0.3

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 115 of 417

cardiagn.com
Fig.1) Intake Air Temp. sensor : Approx. 161.6°F at IG ON

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 116 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to "Component Inspection" procedure.

cardiagn.com
Component Inspection
1. Ignition "OFF"
2. Disconnect IATS connector
3. Measure resistance between terminals 3and 4 of the sensor connector(Component side).
Specification :

Temp.(°C) Temp.(°F) Resistance(kΩ)

-10 14 8.5~9.7
0 32 5.4~6.1
10 50 3.5~3.9
20 68 2.3~2.5
30 86 1.6~1.7
80 176 Approx. 0.3

4. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check IATS for contamination, deterioration, or damage. Substitute with a known-good IATS and check
for proper operation. If the problem is corrected, replace IATS and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 117 of 417

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0112 Intake Air Temperature Sensor 1 Circuit Low
Input
Component Location

cardiagn.com
General Description
The Intake Air Temperature Sensor (IATS) is installed into the Mass Air Flow Sensor (MAFS). The IATS uses a thermistor whose
resistance changes with the temperature. The electrical resistance of the IATS decreases as the temperature increases, and
increases as the temperature decreases. The 5 V power source in the PCM is supplied to the IATS via a resistor in the PCM.
That is, the resistor in the PCM and the thermistor in the IATS are connected in series. When the resistance value of the
thermistor in IATS changes according to the intake air temperature, the signal voltage also changes. Using this signal, the
information of the intake air temperature, the PCM corrects basic fuel injection duration and ignition timing.

DTC Description
PCM sets DTC P0112 if the PCM detects signal voltage lower than the possible range of a properly operating IATS.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check

Enable Conditions • 6V < Battery voltage<16V • Short to ground in signal harness

• Poor connection or damaged
Threshold Value • Measured intake air temperature > 142°C(287°F)
harness
Diagnostic Time • 5 seconds • Faulty IAT sensor
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance(kΩ) Temp.(°C) Temp.(°F) Resistance(kΩ)
-10 14 8.5~9.7 20 68 2.3~2.5
0 32 5.4~6.1 30 86 1.6~1.7
10 50 3.5~3.9 80 176 Approx. 0.3

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 118 of 417

cardiagn.com
Signal Waveform & Data

Intake Air Temp. sensor : Approx. 161.6°F at IG ON

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 119 of 417

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Signal Circuit Inspection

1. Ignition "OFF"
2. Disconnect PCM and IAT sensor connector
3. Measure the resistance between signal terminal of IATS harness connector and chassis ground.

Specification : Infinite

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "W/Harness Inspection" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 120 of 417

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to "Component Inspection" procedure.

Component Inspection
1. Ignition "OFF"
2. Disconnect IATS connector
3. Measure resistance between terminals 3and 4 of the sensor connector(Component side).
Specification :

Temp.(°C) Temp.(°F) Resistance(kΩ)

-10 14 8.5~9.7
0 32 5.4~6.1
10 50 3.5~3.9
20 68 2.3~2.5
30 86 1.6~1.7

cardiagn.com
80 176 Approx. 0.3

4. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check IATS for contamination, deterioration, or damage. Substitute with a known-good IATS and check
for proper operation. If the problem is corrected, replace IATS and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0113 Intake Air Temperature Sensor 1 Circuit High
Input
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 121 of 417

General Description
The Intake Air Temperature Sensor (IATS) is installed into the Mass Air Flow Sensor (MAFS). The IATS uses a thermistor whose
resistance changes with the temperature. The electrical resistance of the IATS decreases as the temperature increases, and
increases as the temperature decreases. The 5 V power source in the PCM is supplied to the IATS via a resistor in the PCM.
That is, the resistor in the PCM and the thermistor in the IATS are connected in series. When the resistance value of the
thermistor in IATS changes according to the intake air temperature, the signal voltage also changes. Using this signal, the
information of the intake air temperature, the PCM corrects basic fuel injection duration and ignition timing.

cardiagn.com
DTC Description
PCM sets DTC P0113 if the PCM detects signal voltage higher than the possible range of a properly operating IATS.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check
• Short to battery in signal harness
Enable Conditions • Time after start > 110 sec.
• Open in signal or ground circuit
Threshold Value • Measured intake air temperature < -46°C(-51°F) • Poor connection or damaged
harness
Diagnostic Time • 5 seconds
• Faulty IAT sensor
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance(kΩ) Temp.(°C) Temp.(°F) Resistance(kΩ)
-10 14 8.5~9.7 20 68 2.3~2.5
0 32 5.4~6.1 30 86 1.6~1.7
10 50 3.5~3.9 80 176 Approx. 0.3

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 122 of 417

cardiagn.com
Signal Waveform & Data

FIG.1) Intake Air Temp. sensor : Approx. 161.6°F at IG ON

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 123 of 417

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Ground circuit inspection

1. Ignition "OFF"
2. Disconnect IATS connector
3. Measure the resistance between ground terminal of IATS harness connector and chassis ground.

Specification : Approx. 0Ω

4. Is the measured resistance within specification ?

▶ Go to next step as below.

▶ Repair open circuit and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure the voltage between signal terminal of IATS harness connector and chassis ground.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 124 of 417

Specification : Approx. 5V

3. Is voltage within the specification?

▶ Go to next step as below.

▶ Check for open or short to battery in signal harness. Repair as necessary and go to "Verification of
Vehicle Repair" procedure.

Terminal and connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection

cardiagn.com
1. Ignition "OFF"
2. Disconnect IATS connector
3. Measure resistance between terminals 3and 4 of the sensor connector(Component side).
Specification :

Temp.(°C) Temp.(°F) Resistance(kΩ)

-10 14 8.5~9.7
0 32 5.4~6.1
10 50 3.5~3.9
20 68 2.3~2.5
30 86 1.6~1.7
80 176 Approx. 0.3

4. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check IATS for contamination, deterioration, or damage. Substitute with a known-good IATS and check
for proper operation. If the problem is corrected, replace IATS and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 125 of 417

Fuel System > Engine Control System > P0116 Engine Coolant Temperature Circuit Range /
Performance
Component Location

General Description
The Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the
engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the temperature. The electrical

cardiagn.com
resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases. The reference 5 V
in the PCM is supplied to the ECTS via a resistor in the PCM. That is, the resistor in the PCM and the thermistor in the ECTS are
connected in series. When the resistance value of the thermistor in the ECTS changes according to the engine coolant
temperature, the output voltage also changes.During cold engine operation the PCM increases the fuel injection duration and
controls the ignition timing using the information of engine coolant temperature to avoid engine stalling and improve drivability.

DTC Description
PCM sets DTC P0116 if the PCM detects stuck low, high or implausible high ECT signal

DTC Detecting Condition

Item Detecting Condition & Fail Safe Possible Cause

DTC case 1 • Signal stuck Low

Strategy case 2 • Signal stuck High

• No relevant failure
case 1
• 6V < Battery voltage <16V

Enable • No relevant failure

Conditions • Engine oil temp. at engine stop of previous DC > 70°C(158° • Contact resistance in
case 2 F) connections.
• 6V < Battery voltagy < 16V • Insufficient Engine Coolant
• Engine oil temperature at Start < 35°C(95°F) • Faulty Thermostat
case 1 • Engine coolant temperature signal stuck • Faulty ECT sensor
Threshold
Value • Engine coolant temperature at start > 53°C(127°F) with oil
case 2
temperature < 35°C(95°F)

Diagnostic case 1 • 10~30 minutes depends on coolant temp. at start

Time case 2 • Immediate
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance(kΩ) Temp.(°C) Temp.(°F) Resistance(kΩ)
-20 -4 14.1 ~ 16.8 40 104 Approx. 1.2

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 126 of 417

0 32 Approx. 5.8 60 140 Approx. 0.6

20 68 2.3 ~ 2.6 80 176 Approx. 0.3

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 127 of 417

cardiagn.com
Fig.1) Engine Coolant Temp. sensor : Approx. 206.1 °F after warm up. ( at IG ON )

Monitor DTC Status

If any DTCs relating to ECTS are stored, do ALL REPAIRS associated with those codes before proceeding with further
troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 128 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Monitor GDS Data

1. Allow the engine to cool completely
2. Run the cold engine at idle for 5 minutes and observe cooling fan status.

Ensure that the A/C is OFF

3. Check the engine coolant temperature parameter at idle with the GDS.
4. Is the engine coolant temperature increase to above 50°C(122°F)
5. Are the cooling fans running when engine coolant temperature is low(less than approximately 98°C(208°F)) with A/C OFF?

▶ Check for short circuit in cooling fan harness or cooling fan relay. Repair as necessary and go to
"Verification of Vehicle Repair" procedure.
▶ - With ignition "ON", Install GDS and select "COOLING FAN RELAY" on the Actuation Test mode.
- Activates "COOLING FAN RELAY" by pressing "STRT(F1)" key
- Repeat this procedure 4 or 5 times to ensure cooling fan reliability.
- If cooling fan works properly, go to next step as below
- If NG, check for intermittent fault caused by poor contact in the sensor's and/or PCM's connector. Repair
as necessary and go to "Verification of Vehicle Repair" procedure.

System Inspection
1. Coolant Level Inspection
(1) Check the cooling system coolant level.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 129 of 417

(2) Is the coolant in the reservoir at the proper level?

▶ Go to next step as below.

▶ Repair or add engine coolant as necessary and go to "Verification of Vehicle Repair" procedure.

2. Thermostat Inspection
(1) Check if the thermostat bypass valve is stuck in the open position or if the correct type of thermostat was installed.
Replace thermostat as necessary and go to "Verification of Vehicle Repair" procedure.
(2) Check the valve opening temperature of the thermostat

Specification (Valve opening temperature) : 80~84°C(176~183°F):

(3) If the opening temperature is not as specified, Replace thermostat as necessary and go to "Verification of Vehicle Repair"
procedure. If OK, go to next step as below

3. ECT Sensor Inspection

(1) Ignition "OFF"
(2) Disconnect ECTS connector
(3) Measure resistance between terminals 1 and 3 of the sensor connector(Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance(kΩ)

cardiagn.com
-20 -4 14.1 ~ 16.8
0 32 Approx. 5.8
20 68 2.3 ~ 2.6
40 104 Approx. 1.2
60 140 Approx. 0.6
80 176 Approx. 0.3

(4) Is resistance within the specification?

▶ Go to next step as below.

▶ Check ECTS for contamination, deterioration, or damage. Substitute with a known-good ECTS and
check for proper operation. If the problem is corrected, replace ECTS and then go to "Verification of
Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 130 of 417

4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0117 Engine Coolant Temperature Circuit Low Input
Component Location

cardiagn.com
General Description
The Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the
engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the temperature. The electrical
resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases. The reference 5 V
in the PCM is supplied to the ECTS via a resistor in the PCM. That is, the resistor in the PCM and the thermistor in the ECTS are
connected in series. When the resistance value of the thermistor in the ECTS changes according to the engine coolant
temperature, the output voltage also changes.During cold engine operation the PCM increases the fuel injection duration and
controls the ignition timing using the information of engine coolant temperature to avoid engine stalling and improve drivability.

DTC Description
PCM sets DTC P0117 if the PCM detects signal voltage lower than the possible range of a properly operating ECTS.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check

Enable Conditions • 6V < Battery voltage <16V • Short to ground in signal harness
• Poor connection or damaged
Threshold Value • Measured coolant temperature > 138°C(280°F).
harness
Diagnostic Time • 5 sec. • Faulty ECT sensor
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance(kΩ) Temp.(°C) Temp.(°F) Resistance(kΩ)
-20 -4 14.1 ~ 16.8 40 104 Approx. 1.2
0 32 Approx. 5.8 60 140 Approx. 0.6
20 68 2.3 ~ 2.6 80 176 Approx. 0.3

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 131 of 417

cardiagn.com
Signal Waveform & Data

Fig.1) Engine Coolant Temp. sensor : Approx. 206.1 °F after warm up. ( at IG ON )

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 132 of 417

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Signal Circuit Inspection

1. Ignition "OFF"
2. Disconnect ECTS connector
3. Measure the resistance between signal terminal of ECTS harness connector and chassis ground.

Specification : Infinite

4. Is resistance within the specification?

▶ Go to "Terminal and Connector Inspection" procedure.

▶ Repair short to ground in harness and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 133 of 417

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to "Component Inspection" procedure.

Component Inspection
1. Measure the resistance between signal terminal and ground terminal of ECTS connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance(kΩ)

-20 -4 14.1 ~ 16.8
0 32 Approx. 5.8
20 68 2.3 ~ 2.6
40 104 Approx. 1.2
60 140 Approx. 0.6
80 176 Approx. 0.3

2. Is resistance within the specification?

cardiagn.com
▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check ECTS for contamination, deterioration, or damage. Substitute with a known-good ECTS and
check for proper operation. If the problem is corrected, replace ECTS and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0118 Engine Coolant Temperature Circuit High Input
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 134 of 417

General Description
The Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the
engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the temperature. The electrical
resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases. The reference 5 V
in the PCM is supplied to the ECTS via a resistor in the PCM. That is, the resistor in the PCM and the thermistor in the ECTS are
connected in series. When the resistance value of the thermistor in the ECTS changes according to the engine coolant
temperature, the output voltage also changes.During cold engine operation the PCM increases the fuel injection duration and
controls the ignition timing using the information of engine coolant temperature to avoid engine stalling and improve drivability.

cardiagn.com
DTC Description
PCM sets DTC P0118 if the PCM detects signal voltage higher than the possible range of a properly operating ECTS.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check

• 6V < Battery voltage

• Short to battery in signal harness
Enable Conditions • Time after start > 110 sec. (If Intake air temperature < -30°
• Open in signal or ground circuit
C (-22°F))
• Poor connection or damaged
Threshold Value • Measured coolant temperature < -46°C(-51°F) harness
Diagnostic Time • Faulty ECT sensor
• 5 sec.
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance(kΩ) Temp.(°C) Temp.(°F) Resistance(kΩ)
-20 -4 14.1 ~ 16.8 40 104 Approx. 1.2
0 32 Approx. 5.8 60 140 Approx. 0.6
20 68 2.3 ~ 2.6 80 176 Approx. 0.3

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 135 of 417

cardiagn.com
Signal Waveform & Data

Fig.1) Engine Coolant Temp. sensor : Approx. 206.1 °F after warm up. ( at IG ON )

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 136 of 417

Monitor GDS Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Ground circuit inspection

1. Ignition "OFF"
2. Disconnect ECTS connector
3. Measure the resistance between ground terminal of ECTS harness connector and chassis ground.

Specification : Approx. 0Ω

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Repair open circuit and go to "Verification of Vehicle Repair" procedure.

Signal Circuit InspectionGDS

1. Check for short to battery in signal harness
(1) Disconnect PCM connector.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 137 of 417

(2) Ignition "ON" & Engine "OFF"

(3) Measure the voltage between signal terminal of the sensor harness connector and chassis ground.

Specification : Approx. 0V

(4) Is voltage within the specification?

▶ Go to "Terminal and Connector Inspection" procedure.

▶ Check for short to battery or open in signal harness. Repair as necessary and go to "Verification of
Vehicle Repair" procedure.

2. Check for open in signal harness

(1) Ignition "OFF"
(2) Measure the resistance between signal terminal of ECTS harness connector and signal connector of PCM harness
connector.

Specification : Approx. 0Ω

(3) Is resistance within the specification?

▶ Go to next step as below.

▶ Check for open in signal harness. Repair as necessary and go to "Verification of Vehicle Repair"

cardiagn.com
procedure.

Terminal and connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Measure the resistance between signal terminal and ground terminal of ECTS connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance(kΩ)

-20 -4 14.1 ~ 16.8
0 32 Approx. 5.8
20 68 2.3 ~ 2.6
40 104 Approx. 1.2
60 140 Approx. 0.6
80 176 Approx. 0.3

2. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check ECTS for contamination, deterioration, or damage. Substitute with a known-good ECTS and
check for proper operation. If the problem is corrected, replace ECTS and then go to "Verification of
Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 138 of 417

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0121 Throttle/Pedal Position Sensor/Switch \'A\' Circuit
Range/Performance
Component Location

cardiagn.com
General Description
The Throttle Position Sensor (TPS) is mounted on the throttle body and detects the opening angle of the throttle plate. The TPS
has a variable resistor (potentiometer) whose characteristic is the resistance changing according to the throttle angle. During
acceleration, the TPS resistance between the reference 5V and the signal terminal decreases and output voltage increases;
during deceleration, the TPS resistance increases and TPS output voltage decreases. The PCM supplies a reference 5V to the
TPS and the output voltage increases directly with the opening of the throttle valve. The PCM determines operating conditions
such as idle (closed throttle), part load, acceleration/deceleration, and wide-open throttle from the TPS. Also The PCM uses the
Mass Air Flow Sensor (MAFS) signal along with the TPS signal to adjust fuel injection duration and ignition timing.

DTC Description
The DTC P0121 is set when the intake manifold model filtered reduced area controller is out of range in low or high load.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Plausability check

• No relevant failure
Enable Conditions • 11V < Battery voltage < 16V
• Lambda control active
• Poor connection or damaged
• Difference between modeled and measured pressure > harness
Threshold Value 280hpa • Faulty TP Sensor(TPS)
• Lambda controller deviation in same direction
Diagnostic Time • 200 revolutions
Mil On Condition • 2 Driving Cycles

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 139 of 417

Specification
Closed throttle status Wide open throttle
Throttle opening angle(°) 0 ~ 0.5 ° Approx. 86 °
Voltage (V) 0.20 ~ 0.47 V 4.2 ~ 4.7 V
Terminal 1 & 2 0.71 ~ 1.38 kΩ 2.7 kΩ
Resistance (kΩ)
Terminal 2 & 3

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition GDS Screen
TPS VOLTAGE
Normal value with ignition "ON" &
Accelerator pedal released 0.20~0.47V Fig.1
engine "OFF"
Normal value with engine ON & accelerator pedal fully depressed 4.2~4.7V -
Power circuit open 0.01V Fig. 2
Ground circuit open 4.99V Fig. 3
TPS signal circuit
4.99V Fig. 4
Abnormal value with ignition "ON" & open
engine "OFF"
TPS signal circuit
Approx. 0V -
short to ground
TPS signal circuit
Above 4.99V -
short to battery

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 140 of 417

cardiagn.com

Fig.1) Signal increases proportionally with throttle open and close angle

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 141 of 417

Fig.2) Normal value with IG "ON"

Fig.3) Open in signal or ground circuit : Approx. 5V

Monitor DTC Status

If any DTCs relating to TPS are stored, do ALL REPAIRS associated with those codes before proceeding with further
troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Air Leakage Inspection

1. Visually/physically inspect the following items:
- Vacuum hoses for splits, kinks and improper connections.
- EVAP system for leakage
- PCV hose for proper installation
2. Was a problem found in any of the above areas?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 142 of 417

Terminal and Connector Inspection

Check for open or short circuit in harness. Refer to "Signal Waveform & Data" in the "General Information" procedure

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect TPS connector
3. Measure resistance between power terminal and ground terminal of TPS connector(Component side)

Specification : Approx. 1.6 ~ 2.4 kΩ at all throttle position

cardiagn.com
4. With still TPS connector disconnected, measure resistance between signal terminal and ground terminal of TPS connector
(Component side)
5. Operate the throttle valve slowly from the idle position to the full open position and check the resistance changes smoothly in
proportion with the throttle valve opening angle.

Specification : 0.71 ~ 1.38 kΩ at closed throttle valve, 2.7 kΩ at wide open throttle

6. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check TPS for contamination, deterioration, or damage. Substitute with a known-good TPS and check
for proper operation. If the problem is corrected, replace TPS and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0122 Throttle Position Sensor 1 Signal Circuit Low
Input
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 143 of 417

General Description
The Throttle Position Sensor (TPS) is mounted on the throttle body and detects the opening angle of the throttle plate. The TPS
has a variable resistor (potentiometer) whose characteristic is the resistance changing according to the throttle angle. During
acceleration, the TPS resistance between the reference 5V and the signal terminal decreases and output voltage increases;
during deceleration, the TPS resistance increases and TPS output voltage decreases. The PCM supplies a reference 5V to the
TPS and the output voltage increases directly with the opening of the throttle valve. The PCM determines operating conditions
such as idle (closed throttle), part load, acceleration/deceleration, and wide-open throttle from the TPS. Also The PCM uses the
Mass Air Flow Sensor (MAFS) signal along with the TPS signal to adjust fuel injection duration and ignition timing.

cardiagn.com
DTC Description
PCM sets DTC P0122 if the PCM detects signal voltage lower than the possible range of a properly operating TPS.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check
• Open in power supply harness
Enable Conditions • 6V < Battery voltage < 16V • Short to ground in power supply
or signal harness
Threshold Value • Voltage < 0.14 V
• Poor connection or damaged
Diagnostic Time • 1 sec. harness
Mil On Condition • Faulty TP sensor
• 2 Driving Cycles

Specification
Closed throttle status Wide open throttle
Throttle opening angle(°) 0 ~ 0.5 ° Approx. 86 °
Voltage (V) 0.20 ~ 0.47 V 4.2 ~ 4.7 V
Terminal 1 & 2 0.71 ~ 1.38 kΩ 2.7 kΩ
Resistance (kΩ)
Terminal 2 & 3

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 144 of 417

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition GDS Screen
TPS VOLTAGE
Normal value with ignition "ON" &
Accelerator pedal released 0.20~0.47V Fig.1
engine "OFF"
Normal value with engine ON & accelerator pedal fully depressed 4.2~4.7V -
Power circuit open 0.01V Fig. 2
Ground circuit open 4.99V Fig. 3
TPS signal circuit
4.99V Fig. 4
Abnormal value with ignition "ON" & open
engine "OFF"
TPS signal circuit
Approx. 0V -
short to ground
TPS signal circuit
Above 4.99V -
short to battery

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 145 of 417

cardiagn.com

Fig.1) Signal increases proportionally with throttle open and close angle

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 146 of 417

Fig.2) Normal value with IG "ON"

Fig.3) Open in signal or ground circuit : Approx. 5V

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Power Circuit Inspection

Check for open or short circuit in harness. Refer to "Signal Waveform & Data" in the "General Information" procedure

1. Ignition "OFF"
2. Disconnect TPS connector
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of TPS harness connector and chassis ground

Specification : Approx. 5V

5. Is voltage within the specification?

▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 147 of 417

▶ Possibility of open or short to ground in 5V reference circuit. Repair as necessary and go to "Verification
of Vehicle Repair" procedure.

Signal Circuit Inspection

Check for open or short circuit in harness. Refer to "Signal Waveform & Data" in the "General Information" procedure

1. Measure voltage between signal terminal of the sensor harness connector and chassis ground

Specification : Approx. 5V

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Check the short to ground in signal circuit. Repair as necessary and go to "Verification of Vehicle
Repair" procedure.

Terminal and Connector Inspection

cardiagn.com
1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect TPS connector.
3. Measure resistance between power terminal and ground terminal of TPS connector(Component side)

Specification : Approx. 1.6 ~ 2.4 kΩ at all throttle position

4. With still TPS connector disconnected, measure resistance between signal terminal and ground terminal of TPS connector
(Component side)
5. Operate the throttle valve slowly from the idle position to the full open position and check the resistance changes smoothly in
proportion with the throttle valve opening angle.

Specification : 0.71 ~ 1.38 kΩ at closed throttle valve, 2.7 kΩ at wide open throttle

6. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check TPS for contamination, deterioration, or damage. Substitute with a known-good TPS and check
for proper operation. If the problem is corrected, replace TPS and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 148 of 417

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.

2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0123 Throttle Position Sensor 1 Signal Circuit High
Input
Component Location

cardiagn.com
General Description
The Throttle Position Sensor (TPS) is mounted on the throttle body and detects the opening angle of the throttle plate. The TPS
has a variable resistor (potentiometer) whose characteristic is the resistance changing according to the throttle angle. During
acceleration, the TPS resistance between the reference 5V and the signal terminal decreases and output voltage increases;
during deceleration, the TPS resistance increases and TPS output voltage decreases. The PCM supplies a reference 5V to the
TPS and the output voltage increases directly with the opening of the throttle valve. The PCM determines operating conditions
such as idle (closed throttle), part load, acceleration/deceleration, and wide-open throttle from the TPS. Also The PCM uses the
Mass Air Flow Sensor (MAFS) signal along with the TPS signal to adjust fuel injection duration and ignition timing.

DTC Description
PCM sets DTC P0123 if the PCM detects signal voltage higher than the possible range of a properly operating TPS

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check
• Open in signal or ground circuit
Enable Conditions • 6V < Battery voltage <16V
• Short to battery in signal circuit
Threshold Value • Voltage > 4.86 V • Poor connection or damaged
harness
Diagnostic Time • 1 sec.
• Faulty TP sensor
Mil On Condition • 2 Driving Cycles

Specification
Closed throttle status Wide open throttle
Throttle opening angle(°) 0 ~ 0.5 ° Approx. 86 °
Voltage (V) 0.20 ~ 0.47 V 4.2 ~ 4.7 V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 149 of 417

Terminal 1 & 2 0.71 ~ 1.38 kΩ 2.7 kΩ

Resistance (kΩ)
Terminal 2 & 3

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition GDS Screen
TPS VOLTAGE
Normal value with ignition "ON" &
Accelerator pedal released 0.20~0.47V Fig.1
engine "OFF"
Normal value with engine ON & accelerator pedal fully depressed 4.2~4.7V -
Power circuit open 0.01V Fig. 2
Ground circuit open 4.99V Fig. 3
TPS signal circuit
4.99V Fig. 4
Abnormal value with ignition "ON" & open
engine "OFF"
TPS signal circuit
Approx. 0V -
short to ground
TPS signal circuit
Above 4.99V -
short to battery

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 150 of 417

cardiagn.com

Fig.1) Signal increases proportionally with throttle open and close angle

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 151 of 417

Fig.2) Normal value with IG "ON"

Fig.3) Open in signal or ground circuit : Approx. 5V

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Ground Circuit Inspection

Check for open or short circuit in harness. Refer to "Signal Waveform & Data" in the "General Information" procedure

1. Ignition "OFF"
2. Disconnect TPS connector.
3. Measure resistance between ground terminal of TPS harness connector and chassis ground.

Specification : Approx. 0Ω

4. Is resistance within the specification?

▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 152 of 417

▶ Check the ground circuit for an open. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Signal Circuit Inspection

Check for open or short circuit in harness. Refer to "Signal Waveform & Data" in the "General Information" procedure

1. Check for short to battery in signal circuit

(1) Disconnect PCM connector
(2) Ignition "ON" & Engine "OFF"
(3) Measure voltage between signal terminal of TPS harness connector and chassis ground

Specification : Approx. 0V

(4) Is voltage within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
2. Check for open in signal circuit
(1) Ignition "OFF"
(2) Measure resistance between signal terminal of TPS harness connector and TPS signal terminal of the ECM harness
connector.

Specification : Approx. 0Ω

(3) Is resistance within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect TPS connector
3. Measure resistance between power terminal and ground terminal of TPS connector(Component side)

Specification : Approx. 1.6 ~ 2.4 kΩ at all throttle position

4. With still TPS connector disconnected, measure resistance between signal terminal and ground terminal of TPS connector
(Component side)
5. Operate the throttle valve slowly from the idle position to the full open position and check the resistance changes smoothly in
proportion with the throttle valve opening angle.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 153 of 417

Specification : 0.71 ~ 1.38 kΩ at closed throttle valve, 2.7 kΩ at wide open throttle

6. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check TPS for contamination, deterioration, or damage. Substitute with a known-good TPS and check
for proper operation. If the problem is corrected, replace TPS and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0125 Insufficient Coolant Temperature for Closed
Loop Fuel Control
Component Location

General Description
An Engine Coolant Temperature Sensor (ECTS) monitors the temperature of the coolant. This input is used by the PCM for
engine control and as an enabling criteria for related diagnostics. The air flow coming into the engine is accumulated and used to
determine if the engine has been driven within conditions that would allow the engine coolant to heat up normally to the
thermostat regulating temperature. If the coolant temperature does not reach regulating temperature of the thermostat,
diagnostics that use engine coolant temperature as enabling criteria, may not run when expected.This DTC will set when there
has been excessive time to reach a minimum coolant temperature required for closed loop fuel control.

DTC Description
The purpose of this diagnosis is to monitor the minimum coolant temperature that enables lambda closed loop control after start.
Minimum coolant temperature to run lambda control must be reached before the threshold time predetermined according to intake
air temperature at start. If the lambda control is not active because of low engine coolant temperature within predetermined
minimum time after start, the PCM sets DTC P0125.

DTC Detecting Condition

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 154 of 417

Item Detecting Condition Possible Cause

DTC Strategy • Coolant temperature too low for Lambda regulation

• Minimum time(-15°C : approx.200sec, -10°C :

approx.150sec, -4°C : 100sec.,25°C : 40sec.) after start
Enable Conditions versus coolant temperature at Start
• No relevant failure
• Faulty cooling system
• 6V< Battery voltage <16V
• Faulty ECT sensor
• Lambda control not active when modelled coolant temp. >
Threshold Value
minimum coolant temp. for Lambda regulation
Diagnostic Time • Immediate
Mil On Condition • 2 Driving Cycles

Specification
[ECTS]

Temp.(°C) Resistance(kΩ) Temp.(°C) Resistance(kΩ)

-20 14.1 ~ 16.8 40 Approx. 1.2
0 Approx. 5.8 60 Approx. 0.6

cardiagn.com
20 2.3 ~ 2.6 80 Approx. 0.3

[THERMOSTAT]

THERMOSTAT Normal Parameter

Valve Opening Temp. 80~84°C
Valve Closing Temp. 77°C
Full Open Lift Approx. 8mm(95°C)

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 155 of 417

cardiagn.com
Monitor DTC Status

If any codes relating to ECTs are stored, do ALL REPAIRS associated with those codes before proceeding with this
troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 156 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Monitor GDS Data

1. Allow the engine to cool completely.
2. Run the cold engine at idle for 5 minutes and observe cooling fan status.

Ensure that the A/C is OFF

3. Check the engine coolant temperature parameter at idle with the GDS.
4. Is the engine coolant temperature increase to above 50°C (122°F)

▶ Go to "Terminal and Connector Inspection"procedure.

▶ Go to next step as below.

5. Are the cooling fans running when engine coolant temperature is low ( less than approximately 98°C(208°F)) with A/C OFF?

▶ Check for short circuit in cooling fan harness or cooling fan relay. Repair as necessary and go to
"Verification of Vehicle Repair" procedure.
▶ With ignition "ON", Install GDS and select "COOLING FAN RELAY" on the Actuation Test mode.
- Activates "COOLING FAN RELAY" by pressing "STRT(F1)" key
- Repeat this procedure 4 or 5 times to ensure cooling fan reliability.
- If cooling fan works properly, go to next step as below
- If NG, check for intermittent fault caused by poor contact in the sensor’s and/or PCM’s connector. Repair
as necessary and go to "Verification of Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 157 of 417

System Inspection
1. Coolant Level Inspection
(1) Check the cooling system coolant level.
(2) Is the coolant in the reservoir at the proper level?

▶ Go to next step as below.

▶ Repair or add engine coolant as necessary and go to "Verification of Vehicle Repair" procedure.

2. Thermostat Inspection
(1) Check if the thermostat bypass valve is stuck in the open position or if the correct type of thermostat was installed.
Replace thermostat as necessary and go to "Verification of Vehicle Repair" procedure.
(2) Check the valve opening temperature of the thermostat.

Specification(Valve opening temperature) : 80~84°C(176~183°F)

(3) If the opening temperature is not as specified, Replace thermostat as necessary and go to "Verification of Vehicle Repair"
procedure.If OK, go to next step as below.

3. ECT Sensor Inspection

(1) Ignition "OFF"
(2) Disconnect ECTS connector.

cardiagn.com
(3) Measure resistance between signal terminal and ground terminal of ECTS connector.(Component side).
Specification :

Temp.(°C) Resistance(kΩ)
-20 14.1 ~ 16.8
0 Approx. 5.8
20 2.3 ~ 2.6
40 Approx. 1.2
60 Approx. 0.6
80 Approx. 0.3

(4) Is resistance within the specification?

▶ Go to next step as below.

▶ Check ECTS for contamination, deterioration, or damage. Substitute with a known-good ECTS and
check for proper operation. If the problem is corrected, replace ECTS and then go to "Verification of
Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 158 of 417

in the freeze frame data or enable conditions .

3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0128 Coolant Thermostat (Coolant Temperature below
Thermostat Regulating Temperature)
Component Location

cardiagn.com
General Description
An Engine Coolant Temperature Sensor (ECTS) monitors the temperature of the coolant. This input is used by the PCM for
engine control and as an enabling criteria for same diagnostics. The air flow coming into the engine is accumulated and used to
determine if the engine has been driven within conditions that would allow the engine coolant to heat up normally to the
thermostat regulating temperature. If the coolant temperature does not reach regulating temperature of the thermostat,
diagnostics that use engine coolant temperature as enabling criteria, may not run when expected.This DTC will set when there
has been excessive time to reach a minimum coolant temperature required for closed loop fuel control.

DTC Description
An open stuck thermostat means an increase of the engine warm up time and can cause emission increase as well. To detect
open stuck thermostat, the PCM checks measured coolant temperature as soon as calculated coolant temperature reaches
threshold and sets DTC P0128 when measured coolant temperature is lower than threshold. If same code is set again in the next
driving cycle, MIL is illuminated.

DTC Detecting Condition

Item Detecting Condition & Fail Safe Possible Cause
DTC Strategy • Coolant temp.not reached warm up state

• Fuel-cut off phase <20%

• Low load phase < 50%
• Intake air temperature decrease compared to Start Intake
air temperature > -20°C(-4°F)
Enable Conditions • -10°C(14°F) < Coolant temperature at start < 54.4°C(130°
• Faulty cooling system
F)
• Faulty ECT sensor
• -10°C(14°F) < Intake air temperature at start
• Poor connection or damaged
• No high engine speed(4800rpm) with vehicle stopped
harness
• No relevant failure

• Measured coolant temp. < 74°C(165°F) When modelled

Threshold Value
coolant temp. > 85°C(185°F)

• 10~30 min. depending on coolant temperature at start and

Diagnostic Time
driving pattern

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 159 of 417

Mil On Condition • 2 Driving Cycles

Specification
[ECTS]

Temp.(°C) Resistance(kΩ) Temp.(°C) Resistance(kΩ)

-20 14.1 ~ 16.8 40 Approx. 1.2
0 Approx. 5.8 60 Approx. 0.6
20 2.3 ~ 2.6 80 Approx. 0.3

[THERMOSTAT]

THERMOSTAT Normal Parameter

Valve Opening Temp. 80~84°C
Valve Closing Temp. 77°C
Full Open Lift Approx. 8mm(95°C)

Diagnostic Circuit Diagram

cardiagn.com

Monitor DTC Status

If any codes relating to ECTs are stored, do ALL REPAIRS associated with those codes before proceeding with this
troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 160 of 417

3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Monitor GDS Data

1. Allow the engine to cool completely.
2. Run the cold engine at idle for 5 minutes and observe cooling fan status.

Ensure that the A/C is OFF

3. Check the engine coolant temperature parameter at idle with the GDS.
4. Is the engine coolant temperature increase to above 50°C (122°F)

▶ Go to "Terminal and Connector Inspection"procedure.

▶ Go to next step as below.

5. Are the cooling fans running when engine coolant temperature is low ( less than approximately 98°C(208°F)) with A/C OFF?

▶ Check for short circuit in cooling fan harness or cooling fan relay. Repair as necessary and go to
"Verification of Vehicle Repair" procedure.
▶ With ignition "ON", Install GDS and select "COOLING FAN RELAY" on the Actuation Test mode.
- Activates "COOLING FAN RELAY" by pressing "STRT(F1)" key
- Repeat this procedure 4 or 5 times to ensure cooling fan reliability.
- If cooling fan works properly, go to next step as below
- If NG, check for intermittent fault caused by poor contact in the sensor’s and/or PCM’s connector. Repair

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 161 of 417

as necessary and go to "Verification of Vehicle Repair" procedure.

System Inspection
1. Coolant Level Inspection
(1) Check the cooling system coolant level.
(2) Is the coolant in the reservoir at the proper level?

▶ Go to next step as below.

▶ Repair or add engine coolant as necessary and go to "Verification of Vehicle Repair" procedure.

2. Thermostat Inspection
(1) Check if the thermostat bypass valve is stuck in the open position or if the correct type of thermostat was installed.
Replace thermostat as necessary and go to "Verification of Vehicle Repair" procedure.
(2) Check the valve opening temperature of the thermostat.

Specification(Valve opening temperature) : 80~84°C(176~183°F)

(3) If the opening temperature is not as specified, Replace thermostat as necessary and go to "Verification of Vehicle Repair"
procedure.If OK, go to next step as below.

cardiagn.com
3. ECT Sensor Inspection
(1) Ignition "OFF"
(2) Disconnect ECTS connector.
(3) Measure resistance between signal terminal and ground terminal of ECTS connector.(Component side).
Specification :

Temp.(°C) Resistance(kΩ)
-20 14.1 ~ 16.8
0 Approx. 5.8
20 2.3 ~ 2.6
40 Approx. 1.2
60 Approx. 0.6
80 Approx. 0.3

(4) Is resistance within the specification?

▶ Go to next step as below.

▶ Check ECTS for contamination, deterioration, or damage. Substitute with a known-good ECTS and
check for proper operation. If the problem is corrected, replace ECTS and then go to "Verification of
Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Verification of Vehicle Repair

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 162 of 417

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0130 O2 Sensor Circuit(Bank 1 / Sensor 1)
Component Location

cardiagn.com
General Description
The HO2S(Heated Oxygen Sensor) is used to supply the PCM with information regarding the composition of the air/fuel mixture.
The HO2S is positioned in the exhaust pipe ahead of the TWC. To measure the oxygen content, the HO2S requires a supply of
ambient air as a reference. Since this is supplied through the wiring, the lead must not be clamped or damaged in any other way.
The HO2S produces a voltage that varies between 0.1V and 0.9V under normal operating conditions. The Engine Control Module
(PCM) monitors this voltage and determines if the exhaust gas is lean or rich. If the voltage input at the PCM is under approx.
0.45V the exhaust is lean, and if the voltage input is over approx. 0.45V the exhaust is rich. The PCM constantly monitors the
HO2S signal during closed loop operation and compensates for a rich or lean condition by decreasing or increasing injector pulse
width as necessary.

DTC Description
PCM sets DTC P0130 if the PCM detects that the front HO2S signal circuit is open.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check

Case1 • Depending on Start temp.(-30°C:100s~90°C:30s)

• 10V< Battery voltage

Enable
Conditions • Exhaust gas temperature > 600°C(1112°F)
Case2 • Open in signal harness
• Lambda control active
• Open in ground harness
• No relevant failure
• Poor connection or damaged
Threshold Case1 • Lambda control not active within the defined time harness
Value Case2 • 0.37V< HO2S < 0.49V • Faulty Heated O2 Sensor(HO2S)

Diagnostic Case1 • 30~100 sec.(depending on Start temp)

Time Case2 • 10sec.
MIL On Condition • 2 Driving Cycles

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 163 of 417

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition
O2 SNSR VOL.-B1/S1 O2 SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when circuit is (above 0.45V) to lean(below
Idle after warm up above 0.7V
normal 0.45V) a minimum of 3 times
in 10
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 164 of 417

cardiagn.com
1. Normal value with idle after warm up : Signal is switching from rich(above 0.45V) to lean(below 0.45V) a minimum of 3 times in
10 seconds.
2. GDS display with open in signal circuit : Approx. 0.43~0.45V

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 165 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Ground Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S connector.
3. Measure resistance between ground terminal of HO2S(B1/S1) harness connector and chassis ground

Specification : Approx. 0Ω

4. Is resistance within the specification?

cardiagn.com
▶ Go to "Signal circuit inspection" procedure.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Signal Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between signal terminal of HO2S(B1S1) harness connector and chassis ground

Specification : Approx. 0.4~0.5V

3. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 166 of 417

Component Inspection
1. Visually/physically inspect the following items:
- Inspect the front HO2S for any silicon contamination. This contamination will be indicated by a white powdery coating on the
portion of the sensor exposed to the exhaust stream and this will result in a but false(high) voltage signal
- If contamination is evident on the HO2S, fix the source of the sensor contamination before replacing the sensor to prevent
future contamination. Go to "Verification of Vehicle Repair" procedure.
2. Warm up the engine to normal operating temperature and let it idle.
3. Connect GDSand monitor the O2 SNSR VOL.-B1/S1 parameter on the GDSdata list

Specification : Verify signal is switching from rich(above 0.45V) to lean(below 0.45V) a minimum of 3
times in 10 seconds (voltage will vary between 0.1 and 0.9V) at idle.

4. Is sensor switching properly?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

cardiagn.com
Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0131 O2 Sensor Circuit Low Voltage(Bank 1 / Sensor
1)
Component Location

General Description
The linear O2 sensor is mounted on the front side of the Catalytic Converter (warm-up catalytic converter) or in the front exhaust
pipe. It detects a wide range of air/fuel ratios in the exhaust gas from the rich to lean regions. This linear O2 sensor produces a
current that corresponds to a specific air/fuel ratio. The PCM monitors this signal and determines whether the air/fuel mixture is
rich or lean. The PCM constantly monitors the linear O2 sensor and increases or decreases the fuel injection duration using this
signal. This is called closed-loop fuel control operation.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 167 of 417

DTC Description
The control unit of the linear oxygen sensor built inside the PCM monitors short circuit error on all front Heated Oxygen Sensor
(HO2S) control lines (PIN#19, PIN#40, PIN#41 and PIN#53) and PCM sets P0131 with short circuit to ground.If same code is set
again in the next driving cycle, MIL is illuminated.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check

• Canister Purge valve closed

Enable Conditions • 10V < Battery voltage • Short to ground in signal harness
• No relrvant failure • Poor connection or damaged
harness
Threshold Value • Short circuit to ground
• Faulty Heated O2 Sensor(HO2S)
Diagnostic Time • 40 sec.
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

cardiagn.com

Signal Waveform & Data

GDS Parameter
Test Condition
O2 SNSR VOL.-B1/S1 O2 SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when circuit is (above 0.45V) to lean(below
Idle after warm up above 0.7V
normal 0.45V) a minimum of 3 times
in 10
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 168 of 417

HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

cardiagn.com
1. Normal value with idle after warm up : Signal is switching from rich(above 0.45V) to lean(below 0.45V) a minimum of 3 times in
10 seconds.
2. GDS display with open in signal circuit : Approx. 0.43~0.45V

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 169 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Signal Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S and PCM connector.
3. Measure resistance between signal terminal of HO2S(B1S1) harness connector and chassis ground.

Specification : Infinite

4. Is HO2S display near the specification?

▶ Go to next step as below.

▶ Repair open or short to ground in signal circuit and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 170 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. - Inspect the front HO2S for any silicon contamination. This contamination will be indicated by a white powdery coating and
this will result in a but false voltage signal
- If contamination is evident on the HO2S, replace contaminated sensor and go to next step.
2. Warm up the engine to normal operating temperature and check that HO2S signal is active.
3. Connect GDSand monitor the "O2 SNSR VOLT.(B1/S1)" parameter on the GDSdata list.

Test Condition : Engine "ON" & In Closed loop mode

Specification : - Normal HO2S(B1S1) value with engine warm-up and idling : Approx. 1.5~2.0V
- Signal decreases with rich air/fuel mixture and increases with lean air/fuel mixture
- Voltage at Fuel cut-off mode : Approx. 3.0~4.0V

4. Is sensor data near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken

cardiagn.com
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace
HO2S and then go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0132 O2 Sensor Circuit High Voltage(Bank 1 / Sensor
1)
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 171 of 417

General Description
The linear O2 sensor is mounted on the front side of the Catalytic Converter (warm-up catalytic converter) or in the front exhaust
pipe. It detects a wide range of air/fuel ratios in the exhaust gas from the rich to lean regions. This linear O2 sensor produces a
current that corresponds to a specific air/fuel ratio. The PCM monitors this signal and determines whether the air/fuel mixture is
rich or lean. The PCM constantly monitors the linear O2 sensor and increases or decreases the fuel injection duration using this
signal. This is called closed-loop fuel control operation.

DTC Description
PCM sets DTC P0132 if the HO2S(B1S1) voltage remains excessively high for a predetermined time.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage Range check

• No relevant failure
Enable Conditions • Short to Battery in signal harness
• 10V < Battery voltage
• Poor connection or damaged
Threshold Value • Short Circuit to Battery harness
• Faulty Heated O2 Sensor(HO2S)
Diagnostic Time • 1 sec
Mil On Condition • 2 Driving Cycles

cardiagn.com
Diagnostic Circuit Diagram

Signal Waveform & Data

GDS Parameter
Test Condition
O2 SNSR VOL.-B1/S1 O2 SNSR VOL.-B1/S2
Signal is switching from rich
Idle after warm up (above 0.45V) to lean(below above 0.7V
Normal Value when circuit is

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 172 of 417

normal 0.45V) a minimum of 3 times

in 10
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

cardiagn.com
1. Normal value with idle after warm up : Signal is switching from rich(above 0.45V) to lean(below 0.45V) a minimum of 3 times in
10 seconds.
2. GDS display with open in signal circuit : Approx. 0.43~0.45V

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 173 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Signal Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S and PCM connector.
3. Ignition "OFF", Engine "ON"
4. Measure voltage between signal terminal of HO2S(B1S1) harness connector and chassis ground

Specification : Approx. 0.4~0.5V

5. Is HO2S display near the specification?

▶ Go to next step as below.

▶ Repair open or short to ground in signal circuit and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 174 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. - Inspect the front HO2S for any silicon contamination. This contamination will be indicated by a white powdery coating and
this will result in a but false voltage signal.
- If contamination is evident on the HO2S, replace contaminated sensor and go to next step.
2. Warm up the engine to normal operating temperature and let it idle.
3. Connect GDSand monitor the "O2 SNSR VOLT.(B1/S1)" parameter on the GDSdata list.

Test Condition : Engine "ON" & In Closed loop mode

Specification : - Normal HO2S(B1S1) value with engine warm-up and idling : Approx. 1.5~2.0V
- Signal decreases with rich air/fuel mixture and increases with lean air/fuel mixture
- Voltage at Fuel cut-off mode : Approx. 3.0~4.0V

4. Is sensor data near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken

cardiagn.com
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace
HO2S and then go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0133 O2 Sensor Circuit Slow Response (Bank 1 /
Sensor 1)
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 175 of 417

General Description
The linear O2 sensor is mounted on the front side of the Catalytic Converter (warm-up catalytic converter) or in the front exhaust
pipe. It detects a wide range of air/fuel ratios in the exhaust gas from the rich to lean regions. This linear O2 sensor produces a
current that corresponds to a specific air/fuel ratio. The PCM monitors this signal and determines whether the air/fuel mixture is
rich or lean. The PCM constantly monitors the linear O2 sensor and increases or decreases the fuel injection duration using this
signal. This is called closed-loop fuel control operation.

DTC Description
The PCM monitors front oxygen sensor amplitude level and compares it to predetermined minimum amplitude value which could
increase emission or disturb lambda control by the effect of aging on the oxygen sensor. The PCM sets DTC P0133 when the
amplitude of oxygen sensor is equal to or less than minimum amplitude threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Lambda Regulation Frequency Check

• 400°C < Modeled catalyst temp. < 900°C

• Lambda regulation active
• Engine speed < 3400 rpm
• 200 mg/rev < Engine Load < 700 mg/rev
Enable Conditions • Coolant temperature > 74°C(165°F)
• Leak in intake or exhaust system.

cardiagn.com
• 3 mph < Vehicle speed < 112 mph
• Poor connection or damaged
• Canister purge closed harness
• No relevant failure • HO2S contamination
• 11V<Battery voltage

• Average Ratio between measured and maximum allowed

Threshold Value
frequency during 100 Lambda regulation cycles > 0.95
Diagnostic Time • 20 Forced stimulation cycles
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 176 of 417

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition
O2 SNSR VOL.-B1/S1 O2 SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when circuit is (above 0.45V) to lean(below
Idle after warm up above 0.7V
normal 0.45V) a minimum of 3 times
in 10
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 177 of 417

cardiagn.com
1. Normal value with idle after warm up : Signal is switching from rich(above 0.45V) to lean(below 0.45V) a minimum of 3 times in
10 seconds.
2. GDS display with open in signal circuit : Approx. 0.43~0.45V

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 178 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Air Leakage Inspection

1. Visually/physically inspect the following items:
- Vacuum hoses for splits, kinks and improper connections.
- Exhaust system between HO2S and Three way catalyst for air leakage
- EVAP system for leakage
- PCV hose for proper installation
2. Was a problem found in any of the above areas?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
▶ Go to next step as below.

Visual/Physical Inspection
1. Visually/physically inspect the following items:
- Ensure that the HO2S is securely installed.
- Check for corrosion on terminals
- Check for terminal tension ( at the HO2S and at the PCM)
- Check for damaged wiring
- Check the HO2S ground circuit for a good connection
2. Was a problem found in any of the above areas?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Visually/physically inspect following items:
- Inspect the front HO2S for any silicon contamination. This contamination will be indicated by a white powdery coating and
this will result in a but false voltage signal
- If contamination is evident on the HO2S, replace contaminated sensor and go to next step.
2. Warm up the engine to normal operating temperature and check that HO2S signal is active.
3. Connect GDSand monitor the "O2 SNSR VOLT.(B1/S1)" parameter on the GDSdata list.

Test Condition : Engine "ON" & In Closed loop mode

Specification : - Normal HO2S(B1S1) value with engine warm-up and idling : Approx. 1.5~2.0V
- Signal decreases with rich air/fuel mixture and increases with lean air/fuel mixture
- Voltage at Fuel cut-off mode : Approx. 3.0~4.0V

4. Is sensor data near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 179 of 417

▶ Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace
HO2S and then go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0134 O2 Sensor Circuit No Activity Detected (Bank 1
Sensor 1)
Component Location

cardiagn.com
General Description
The HO2S(Heated Oxygen Sensor) is used to supply the PCM with information regarding the composition of the air/fuel mixture.
The HO2S is positioned in the exhaust pipe ahead of the TWC. To measure the oxygen content, the HO2S requires a supply of
ambient air as a reference. Since this is supplied through the wiring, the lead must not be clamped or damaged in any other way.
The HO2S produces a voltage that varies between 0.1V and 0.9V under normal operating conditions. The Engine Control Module
(PCM) monitors this voltage and determines if the exhaust gas is lean or rich. If the voltage input at the PCM is under approx.
0.45V the exhaust is lean, and if the voltage input is over approx. 0.45V the exhaust is rich. The PCM constantly monitors the
HO2S signal during closed loop operation and compensates for a rich or lean condition by decreasing or increasing injector pulse
width as necessary.

DTC Description
1. Signal amplitude plausibility error : In order to determine the signal amplitude plausibility, the PCM monitors front HO2S signal
level from rich to lean and from lean to rich. The PCM sets DTC P0134, If the difference of the signal transition level is too
small.
2. Signal plausibility error during fuel cut-off : PCM sets DTC P0134, if the HO2S(B1S1) signal is too high during fuel cut-off
period for a predetermined time.

DTC Detecting Condition

Item Detecting Condition Possible Cause

DTC Case1 • Signal plausibility during fuel cut-off

Strategy Case2 • Signal amplitude plausibility

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 180 of 417

• fule cut off active

• Fule cut off phase
Case1 • 16g< Integrated Mass Air Flow since Fuel Cut-Off begin
• No relevant failure
Enable • 10V< Battery voltage
Conditions • Signal stroke valid
• Lambda controller not on the limit
Case2 • Lean / rich cycle time < 2.5 sec • Poor connection or damaged
• No relevant failure harness
• 10V< Battery voltage • HO2S contamination

Threshold Case1 • HO2S voltage at fuel-cut mode > 0.1V

Value Case2 • Upstream O2 sensor signal stroke < 0.25 V

Diagnostic Case1 • 5 sec.

Time Case2 • 120 sec.

MIL On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

cardiagn.com

Signal Waveform & Data

GDS Parameter
Test Condition
O2 SNSR VOL.-B1/S1 O2 SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when circuit is (above 0.45V) to lean(below
Idle after warm up above 0.7V
normal 0.45V) a minimum of 3 times
in 10
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 181 of 417

HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

cardiagn.com
1. Normal value with idle after warm up : Signal is switching from rich(above 0.45V) to lean(below 0.45V) a minimum of 3 times in
10 seconds.
2. GDS display with open in signal circuit : Approx. 0.43~0.45V

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 182 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Terminal and Connector Inspection

1. Ignition "ON" & Engine "OFF"
2. Monitor the O2 SNSR VOL.-B1/S1 parameter on the GDSdata list while wiggling the wiring harness and related connectors.
3. The value should remain more or less unchanged. If not, check for the following conditions:
- Check for corrosion on terminals
- Check for terminal tension ( at the HO2S and at the PCM )
- Check for damaged wiring
- Check the HO2S ground circuit for a good connection
- Check the 15A sensor2 fuse
- Check front and rear HO2S for connections being reversed.
4. Was a problem found in any of the above areas?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Visually/physically inspect the following conditions:
- Ensure that the HO2S is securely installed.
- Silicon contamination. This contamination will be indicated by a white powdery coating on the portion of the sensor exposed
to the exhaust stream and this will result in a but false(high) voltage signal.
- Fuel, engine coolant or oil contamination.
- Use of improper sealant.
- If contamination is evident on the HO2S, Fix the source of the sensor contamination before replacing the sensor to prevent

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 183 of 417

future contamination. Go to "Verification of Vehicle Repair" procedure.

2. Warm up the engine to normal operating temperature and let it idle.
3. Connect GDSand monitor the O2 SNSR VOL.-B1/S1 parameter on the GDSdata list.

Specification : Refer to "Signal Waveform & Data" in the "General Information" procedure. Verify signal
is switching from rich(above 0.45V) to lean(below 0.45V) a minimum of 3 times in 10 seconds (voltage
will vary between 0.1 and 0.9V) at idle.

4. Is sensor switching properly?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted

cardiagn.com
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0136 O2 Sensor Circuit(Bank 1 / Sensor 2)
Component Location

General Description
The rear heated oxygen sensor is mounted on the rear side of the Catalytic Converter (warm-up catalytic converter) or in the rear
exhaust pipe, which is able to detect catalyst efficiency. The rear heated oxygen sensor (HO2S) produces a voltage between 0V
and 1V. This rear heated oxygen sensor is used to estimate the oxygen storage capability. If a catalyst has good conversion
properties, the oxygen fluctuations are smoothed by the oxygen storage capacity of the catalyst. If the conversion provided by the
catalyst is low due to aging, poisoning or misfiring, then the oxygen fluctuations are similar to signals from the front oxygen
sensor.

DTC Description
PCM sets DTC P0136 if the PCM detects that the rear HO2S signal circuit is open.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 184 of 417

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check

• HO2S Sensor operative readiness

• Open in signal harness
Enable Conditions • No relevant failure
• Open in ground harness
• 10V < Battery voltage
• Poor connection or damaged
• 0.37 < Downstream HO2S Sensor voltage < 0.49V & harness
Threshold Value
sensor element resistance > 60kΩ • Faulty Heated HO2S Sensor
(HO2S)
Diagnostic Time • 30 sec.
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition
O2 SNSR VOL.-B1/S1 O2 SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when circuit is (above 0.45V) to lean(below
Idle after warm up above 0.7V
normal 0.45V) a minimum of 3 times
in 10
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 185 of 417

cardiagn.com
Fig.1) HO2S signal waveform with idle after warm up :
1: Normal status(Approx. above 0.7V), 2: Open in signal circuit(Approx. 0.4~0.5V)

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 186 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Ground Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S connectors.
3. Measure resistance between Ground terminals of HO2S(B1S2) harness connector and chassis ground.

Specification : Approx. 0Ω

4. Is resistance within the specification?

cardiagn.com
▶ Go to "Signal circuit inspection" procedure.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Signal Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between signal terminal of HO2S(B1S2) harness connector and chassis ground.

Specification : Approx. 0.4~0.5V

3. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 187 of 417

Component Inspection
1. With ignition "OFF", reconnect the HO2S connector.
2. Warm up the engine to normal operating temperature and let it idle.
3. Connect GDSand monitor the HO2S SNSR VOL.-B1/S2 parameter on the GDSdata list.

Specification : Above 0.7V at idle

4. Is sensor data near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted

cardiagn.com
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0137 O2 Sensor Circuit Low Voltage (Bank 1 / Sensor
2)
Component Location

General Description
The normal operating temperature of the HO2S(Heated Oxygen Sensor) ranges from 350 to 850°C(662 to 1562°F). The HO2S
heater greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width
modulated control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the
current in the circuit is high. On the contrary, if the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description
PCM sets DTC P0137 if the HO2S(B1S2) voltage remains excessively low for a predetermined time.

DTC Detecting Condition

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 188 of 417

Item Detecting Condition Possible Cause

DTC Strategy • Voltage range check

• Catalyst temperature model > 400°C(752°F)

• Lambda regulation active
• Lambda controller not on the limit
Enable Conditions
• Catalyst purge after Fuel Cut Off not active • Short to ground in signal harness
• No relevant failure • Poor connection or damaged
• 10V < Battery voltage harness
• Faulty Heated O2 Sensor(HO2S)
• Downstream O2 Sensor voltage < 0.02V & sensor element
Threshold Value
resistance < 30Ω
Diagnostic Time • 20 sec.
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition
HO2S SNSR VOL.-B1/S1 HO2S SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when (above 0.45V) to lean(below
Idle after warm up above 0.7V
circuit is normal 0.45V) a minimum of 3 times
in 10 seconds.
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 189 of 417

cardiagn.com
Fig.1) HO2S signal waveform with idle after warm up :
1: Normal status(Approx. above 0.7V), 2: Open in signal circuit(Approx. 0.4~0.5V)

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 190 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Signal Circuit Inspection

1. Ignition "OFF"
2. Disconnect PCM and HO2S connector.
3. Measure resistance between signal terminal of HO2S(B1S2) harness connector and chassis ground.

Specification : Infinite

4. Is resistance within the specification?

cardiagn.com
▶ Go to next step as below.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. With ignition "OFF", reconnect the HO2S connector.
2. Warm up the engine to normal operating temperature and let it idle.
3. Connect GDSand monitor the HO2S SNSR VOL.-B1/S2 parameter on the GDSdata list.

Specification : Above 0.7V at idle

4. Is sensor data near the specified value?

▶Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ '- Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 191 of 417

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0138 O2 Sensor Circuit High Voltage (Bank 1 / Sensor
2)
Component Location

cardiagn.com
General Description
The rear heated oxygen sensor is mounted on the rear side of the Catalytic Converter (warm-up catalytic converter) or in the rear
exhaust pipe, which is able to detect catalyst efficiency. The rear heated oxygen sensor (HO2S) produces a voltage between 0V
and 1V. This rear heated oxygen sensor is used to estimate the oxygen storage capability. If a catalyst has good conversion
properties, the oxygen fluctuations are smoothed by the oxygen storage capacity of the catalyst. If the conversion provided by the
catalyst is low due to aging, poisoning or misfiring, then the oxygen fluctuations are similar to signals from the front oxygen
sensor.

DTC Description
PCM sets DTC P0138 if the HO2S(B1S2) voltage remains excessively high for a predetermined time.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage range check

• 10V < Battery voltage

Enable Conditions • Short to Battery in signal harness
• No relevant failure
• Poor connection or damaged
Threshold Value • Sensor voltage >1.3V harness
• Faulty Heated O2 Sensor(HO2S)
Diagnostic Time • 1 sec.
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 192 of 417

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition
HO2S SNSR VOL.-B1/S1 HO2S SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when (above 0.45V) to lean(below
Idle after warm up above 0.7V
circuit is normal 0.45V) a minimum of 3 times
in 10 seconds.
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 193 of 417

cardiagn.com
Fig.1) HO2S signal waveform with idle after warm up :
1: Normal status(Approx. above 0.7V), 2: Open in signal circuit(Approx. 0.4~0.5V)

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 194 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Signal Circuit Inspection

1. Ignition "OFF"
2. Disconnect PCM and HO2S connector.
3. Ignition "ON" & Engine"OFF"
4. Measure resistance between signal terminal of HO2S(B1S2) harness connector and chassis ground.

Specification : Approx. 0.4~0.5V

cardiagn.com
5. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor
wire(s). Do not attempt to repair the wire(s), connector, or the terminals.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. With ignition "OFF", reconnect the HO2S connector.
2. Warm up the engine to normal operating temperature and let it idle.
3. Connect GDSand monitor the HO2S SNSR VOL.-B1/S2 parameter on the GDSdata list.

Specification : Above 0.7V at idle

4. Is sensor data near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ '- Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 195 of 417

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0139 O2 Sensor Circuit Slow Response(Bank 1 /
Sensor 2)
Component Location

cardiagn.com
General Description
The rear heated oxygen sensor is mounted on the rear side of the Catalytic Converter (warm-up catalytic converter) or in the rear
exhaust pipe, which is able to detect catalyst efficiency. The rear heated oxygen sensor (HO2S) produces a voltage between 0V
and 1V. This rear heated oxygen sensor is used to estimate the oxygen storage capability. If a catalyst has good conversion
properties, the oxygen fluctuations are smoothed by the oxygen storage capacity of the catalyst. If the conversion provided by the
catalyst is low due to aging, poisoning or misfiring, then the oxygen fluctuations are similar to signals from the front oxygen
sensor.

DTC Description
The PCM monitors rich-lean switching time of rear heated oxygen sensor (HO2S) after fuel cut-off to validate dynamic behavior of
rear heated oxygen sensor (HO2S). After detection of fuel cut-off engine operating state, the PCM measures rich-lean switching
time of the rear heated oxygen sensor (HO2S) signal and compares it to the predetermined limit value. DTC P0139 is set when
the switching time is bigger than the limit value.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Switching Time check at entry in Fuel Cut-Off

• Catalyst temp.model >350°C(662°F)

• Leak in intake or exhaust system
• No relevant failure
• Faulty fuel system.
• 11V < Battery voltage
Enable Conditions • Front and rear HO2S connections
• Downstream O2 sensor signal at entry in fuel cut off >
reversed.
0.55V
• Poor connection or damaged
• 4.8Km/h(3MPH)<Vehicle speed<180Km/h(112MPH)
harness
• Average ratio(between measured and maximum allowed • HO2S contamination
Threshold Value
switching time at entry in fuel cut-off) > 1

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 196 of 417

Diagnostic Time • 3 fuel cut-off phases

Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data
GDS Parameter
Test Condition
HO2S SNSR VOL.-B1/S1 HO2S SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when (above 0.45V) to lean(below
Idle after warm up above 0.7V
circuit is normal 0.45V) a minimum of 3 times
in 10 seconds.
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 197 of 417

cardiagn.com
Fig.1) HO2S signal waveform with idle after warm up :
1: Normal status(Approx. above 0.7V), 2: Open in signal circuit(Approx. 0.4~0.5V)

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 198 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Visually/physically inspect the following conditions:
'- Ensure that the sensor is securely installed
'- Check for corrosion on terminals
'- Check for damaged wiring
'- Repair as necessary and go to next step
2. Warm up the engine to normal operating temperature and let it idle.
3. Connect GDSand monitor the O2 SNSR VOL.-B1/S2 parameter on the GDSdata list.

cardiagn.com
Specification : Above 0.6V at idle

4. Is sensor data near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ '- Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Exhaust System Inspection

1. Check the exhaust system for an exhaust leak near the engine.
2. Was an exhaust leak found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Air Leakage Inspection

1. Visually/physically inspect the following items:
'- Vacuum hoses for splits, kinks and improper connections.
'- Exhaust system between HO2S and Three way catalyst for air leakage.
'- EVAP system for leakage.
'- PCV hose for proper installation.
2. Was a problem found in any of the above areas?

▶ 'Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below.

Visual/Physical Inspection
1. Visually/physically inspect the following items:
'- Check for corrosion on terminals.
'- Check for terminal tension ( at the HO2S and at the PCM)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 199 of 417

'- Check for damaged wiring.

'- Check the HO2S ground circuit for a good connection.
'- Check front and rear HO2S for connections being reversed.
2. Was a problem found in any of the above areas?

▶ 'Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0140 O2 Sensor Circuit No Activity Detected (Bank 1 /
Sensor 2)
Component Location

General Description
The normal operating temperature of the HO2S(Heated Oxygen Sensor) ranges from 350 to 850°C(662 to 1562°F). The HO2S
heater greatly decreases the amount of time required for fuel control to become active. The PCM provides a pulse width
modulated control circuit to adjust current through the heater. When the HO2S is cold, the value of the resistance is low and the
current in the circuit is high. On the contrary, if the temperature in the resistor of the sensor rises, the current drops gradually.

DTC Description
Due to possible oxygen sensor defects (e.g. reference air poisoning) or faults in the injection system (e.g. leaking fuel injector),
the rear oxygen sensor may not provide the expected lean or rich signal level during fuel cut-off or full load condition. Hence, the
oxygen sensor signal is checked for plausibility during this engine operating states.There are 2 cases which DTC P0140 sets.
(I) Signal monitoring during fuel cut-off: The PCM monitors rear O2 sensor signal level during fuel cut-off which normally shows
near 0V and sets DTC P0140 when signal level is too high.
(II) Signal monitoring after fuel cut-off: The PCM monitors rear O2 sensor signal level after leaving fuel cut-off and sets DTC
P0140 when signal remains at or below 0.6V.

DTC Detecting Condition

Item Detecting Condition Possible Cause

• Signal Plausability with Rich mixture (during Catalyst Purge

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 200 of 417

DTC case1 after Fuel Cut-off)

Strategy case2 • Signal Plausibility with Lean mixture (during Fuel Cut-Off)

• Integrated mass air flow in last fuel cut off > 10g
• Integrated mass air flow in part load > 250g
• Downstream HO2S sensor signal at end of last fuel cut off <
0.25V
case1
• Minimum HO2S(S1) during Catalyst Purge phase < 0.5V
• Catalyst temperature > 348°C(658°F)
Enable • No relevant failure
Conditions • 11V < Battery voltage < 16V • Related fuse blown or missing
• Poor connection or damaged
• 20g < Integrated mass air flow since begin
harness
• No relevant failure
• HO2S contamination
case2 • 10V < Battery voltage
• Fuel Cut Off active
• Fuel cut off phase

Threshold case1 • Voltage <0.55V

Value case2 • Voltage with fuel cut > 0.1V

Diagnostic case1 • 3 valid fuel cut-off phases

Time case2 • 2 sec.

cardiagn.com
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

Signal Waveform & Data

GDS Parameter
Test Condition
HO2S SNSR VOL.-B1/S1 HO2S SNSR VOL.-B1/S2

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 201 of 417

Signal is switching from rich

Normal Value when (above 0.45V) to lean(below
Idle after warm up above 0.7V
circuit is normal 0.45V) a minimum of 3 times
in 10 seconds.
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

cardiagn.com
Fig.1) HO2S signal waveform with idle after warm up :
1: Normal status(Approx. above 0.7V), 2: Open in signal circuit(Approx. 0.4~0.5V)

Monitor DTC Status

If any DTCs relating to HO2S are stored, do ALL REPAIRS associated with those codes before proceeding with further
troubleshooting.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 202 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Terminal and Connector Inspection

1. Ignition "ON" & Engine "OFF"
2. Monitor the HO2S SNSR VOL.-B1/S2 parameter on the GDSdata list while wiggling the wiring harness and related
connectors. Refer to "Signal Waveform & Data" in the "General Information" procedure.
3. The value should remain more or less unchanged. If not, check for the following conditions:
'- Check for corrosion on terminals.
'- Check for terminal tension ( at the HO2S and at the PCM)
'- Check for damaged wiring.
'- Check the HO2S ground circuit for a good connection.
'- Check the 15A sensor2 fuse.
'- Check front and rear HO2S for connections being reversed.
4. Was a problem found in any of the above areas?

▶ 'Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Visually/physically inspect the following conditions:
'- Ensure that the sensor is securely installed
'- Check for corrosion on terminals
'- Check for damaged wiring
'- Repair as necessary and go to next step

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 203 of 417

2. Warm up the engine to normal operating temperature and let it idle.

3. Connect GDSand monitor the O2 SNSR VOL.-B1/S2 parameter on the GDSdata list.

Specification : Above 0.7V at idle

4. Is sensor data near the specified value?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ '- Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and
check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .

cardiagn.com
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0170 Fuel Trim (Bank 1)
General Description
In order to provide the best possible combination of drivability, fuel economy and emission control, the PCM uses a closed loop
air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based it in closed loop fuel control.
Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around
0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that
are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel
trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a
lean or rich condition.

DTC Description
If the fuel trim values reaches the maximum or minimum threshold, then feedback control is no longer possible and emissions will
be increased. The PCM sets DTC P0170 if no proportional fuel adaptation occurs for a defined time after the short term fuel trim
has reached its minimum or maximum threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Monitoring deviation of lambda controller
• Air leakage or restriction in intake
• Lambda control active or exhaust system
• Coolant temperature > 70°C(158°F) • Dirty engine oil or oil level too
Enable Conditions high
• No relevant failure
• 10V < Battery voltage < 16V • Front HO2S or MAFS
contamination
Threshold Value • Lambda controller< -30% or >+50%
• Fuel system
Diagnostic Time • 30 seconds • EVAP system
• Faulty sensor signals
Mil On Condition • 2 Driving Cycles

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 204 of 417

Signal Waveform & Data

1. GDS Display for HO2S

GDS Parameter
Test Condition
HO2S SNSR VOL.-B1/S1 HO2S SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when (above 0.45V) to lean(below
Idle after warm up above 0.7V
circuit is normal 0.45V) a minimum of 3 times
in 10 seconds.
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

2. MAPS Terminal voltage with pressure

Pressure (kPa) Approx. 20 Approx. 35 Approx. 60 Approx. 95 Approx. 101

Voltage(V) Approx. 0.7~0.8 Approx. 1.3~1.4 Approx. 2.3~2.4 Approx. 3.7~3.8 Approx. 3.9~4.1

3. GDS Display for TPS

GDS Parameter
Test Condition
TPS VOLTAGE

cardiagn.com
Normal value with
Accelerator pedal released 0.20~0.47V
ignition "ON" & engine "OFF"
Normal value with engine ON & accelerator pedal fully depressed 4.2~4.7V
Power circuit open 0.01V
Ground cicuit open 4.99V
Abnormal value with
TPS signal circuit open 4.99V
ignition "ON" & engine "OFF"
TPS signal circuit short to ground Approx. 0V
TPS signal circuit short to battery Above 4.99V

Monitor DTC Status

If any DTCs relating to INJECTOR,HO2S,ECTS, or MAFS are stored, do ALL REPAIRS associated with those codes before
proceeding with further troubleshooting.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 205 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Monitor Actuation Test

The main purpose of this test is to identify potential engine mechanical condition problems and fuel and ignition systems
problems that are not common to all cylinders. For best results, perform this test while maintaining as steady an rpm reading
as possible.

Before beginning tests; set the parking brake, place gear selector in P or N and block drive wheels for safety.

1. Warm up the engine to normal operating temperature and let it idle.

2. Install GDS and select INJECTOR #1 parameter on the Actuation Test mode.
3. Monitor engine rpm and shut off the injector #1 by pressing "STRT(F1)" key.
4. Repeat procedure on all injectors and record the engine rpm.

Specification : All cylinders should show an even RPM drop.

1. Was each cylinder's rpm drop within the same value?

▶Go to next step as below.

▶ Cylinders with the least amount of RPM drop are not contributing their share of power.
▶ Go to "Fuel Injector Inspection" procedure and check the suspect cylinders.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 206 of 417

If the RPM loss between cylinders is quite large(200RPM or more) and engine has high mileage,
there is possibility of engine wear. Perform compression test with pressure gauge to check the engine
wear.

Check intake/exhaust system for restriction or leakage

1. Visually/physically inspect the air leakage in intake/exhaust system for the following areas:
'- Vacuum hoses for splits, kinks and improper connections.- Throttle body gasket
'- Throttle body gasket
'- Gasket between intake manifold and cylinder head
'- Seals between intake manifold and fuel injectors
'- Exhaust system between HO2S and Three way catalyst for air leakage
2. Visually/physically inspect the restriction in intake/exhaust system for the following areas:
'- Air cleaner filter element for excessive dirt or for any foreign objects
'- Throttle body inlet for damage or for any foreign objects
'- Throttle bore and throttle plate for chocking and for any foreign objects
'- Restricted exhaust system
3. Was a problem found in any of the above areas?

▶ 'Repair as necessary and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
▶ Go to next step as below.

4. Inspect the leakage in EVAP. system for the following conditions:

(1) Check the EVAP canister for fuel saturation. If the EVAP canister is full of fuel, visually and physically inspect the EVAP
and fuel system.
Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure. If OK, go to next step.
(2) Remove the manifold side vacuum hose from the EVAP canister purge valve.
(3) Using a hand vacuum pump apply specified vacuum(Approx. 15 in, Hg) to the manifold side of the valve.
(4) Does the valve hold vacuum?

▶ Go to next step as below.

▶ Repair air leakage and go to "Verification of Vehicle Repair" procedure.

Sensor Inspection

Refer to "Signal Waveform & Data" in the "General Information" procedure .

1. Visually/physically inspect the HO2S for the following conditions:

- Ensure that the HO2S is securely installed.
- Silicon contamination. This contamination will be indicated by a white powdery coating on the portion of the sensor exposed
to the exhaust stream and this will result in a but false(high) voltage signal.
- Fuel, engine coolant or oil contamination.
- Use of improper sealant.
- If contamination is evident on the HO2S, Fix the source of the sensor contamination before replacing the sensor to prevent
future contamination. Go to "Verification of Vehicle Repair" procedure.
2. Visually/physically inspect the MAFS for the following conditions:
- Contamination or deterioration
- Poor connection or damaged harness
3. Check for an intermittent TPS false signal. TPS signal displayed on a GDSshould increase steadily when depressing
accelerator pedal after starting.
4. Verify that the PCM ground connections are clean and properly tightened.
5. If test result is NG, repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
If OK, go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 207 of 417

If the contamination is evident on the HO2S or MAFS. Fix the source of the sensor contamination before replacing the
sensor to prevent future contamination.

Positive Crankcase Ventilation System Inspection

1. Check the engine oil level. The oil level should be between the min. and max. marking. Fill to the correct oil level
2. Check crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
3. Warm up the engine to normal operating temperature
4. Connect GDSand note the "SHORT TERM FUEL-B1" parameter on the GDSdata list.
5. Disconnect and plug the positive crankcase ventilation at the intake manifold side.
6. Monitor the "SHORT TERM FUEL-B1" parameter on the GDSdata list once again.

Specification : The value should remain more or less unchanged

7. Is the displayed value within the specified value?

▶ Go to next step as below.

▶ Check the PCV(Positive Crankcase Ventilation) valve for operation properly. Refer to "EM" group in
Workshop Manual. If OK, check that engine oil is diluted with fuel. Change the oil or filter as necessary
and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
Fuel System Inspection
1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage.
(3) Inspect fuel pressure with normal idle status.

Specification : 338~348kPa(3.45~3.55kg/cm²)

(4) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Clogged fuel filter Fuel filter
Fuel Pressure too low Fuel leak on the fuel-pressure regulator that is Fuel Pump
assembled on fuel pump (Fuel Pressure Regulator)
Fuel Pressure too Fuel Pump
Sticking fuel pressure regulator
High (Fuel Pressure Regulator)

2. Fuel Pressure Hold Inspection

(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes

(2) Is fuel pressure within the specified value?

▶ Visually/physically inspect the engine mechanical problem for the following:

- Worn cylinder
- Worn valve
- Worn piston or piston ring
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 208 of 417

"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Fuel pressure drops
Injector leak Injector
slowly
Fuel pressure drops
Stuck open in check valve of the fuel pump Fuel pump
immediately

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0171 System too Lean (Bank 1)
General Description
In order to provide the best possible combination of drivability, fuel economy and emission control, the PCM uses a closed loop
air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based it in closed loop fuel control.
Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around
0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that
are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel
trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a
lean or rich condition.

DTC Description
If the lambda controller reaches the maximum or minimum threshold, then feedback control is no longer possible and emissions
will be increased. The PCM sets DTC P2096 if no proportional post catalyst fuel trim adaptation occurs for a defined time after the
lambda controller has reached its maximum threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
• Monitoring deviation of fueling control (Long term + Short
DTC Strategy
term)

• Lambda control active

Enable Conditions
• Canister load < 1 • Three Way Catalytic Converter
(TWC)
• Lambda controller + Trim value > +35％(more than 60sec.
Threshold Value • Rear HO2S
Within 180 sec.)
Diagnostic Time • 60 sec.

Mil On Condition • 2 Driving Cycles

Signal Waveform & Data

1. GDS Display for HO2S

GDS Parameter

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 209 of 417

Test Condition HO2S SNSR VOL.-B1/S1 HO2S SNSR VOL.-B1/S2

Signal is switching from rich
Normal Value when (above 0.45V) to lean(below
Idle after warm up above 0.7V
circuit is normal 0.45V) a minimum of 3 times
in 10 seconds.
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

2. MAPS Terminal voltage with pressure

Pressure (kPa) Approx. 20 Approx. 35 Approx. 60 Approx. 95 Approx. 101

Voltage(V) Approx. 0.7~0.8 Approx. 1.3~1.4 Approx. 2.3~2.4 Approx. 3.7~3.8 Approx. 3.9~4.1

3. GDS Display for TPS

GDS Parameter
Test Condition
TPS VOLTAGE
Normal value with
Accelerator pedal released 0.20~0.47V
ignition "ON" & engine "OFF"
Normal value with engine ON & accelerator pedal fully depressed 4.2~4.7V

cardiagn.com
Power circuit open 0.01V
Ground cicuit open 4.99V
Abnormal value with
TPS signal circuit open 4.99V
ignition "ON" & engine "OFF"
TPS signal circuit short to ground Approx. 0V
TPS signal circuit short to battery Above 4.99V

Monitor DTC Status

If any DTCs relating to INJECTOR,HO2S,ECTS, or MAFS are stored, do ALL REPAIRS associated with those codes before
proceeding with further troubleshooting.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 210 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Monitor Actuation Test

The main purpose of this test is to identify potential engine mechanical condition problems and fuel and ignition systems
problems that are not common to all cylinders. For best results, perform this test while maintaining as steady an rpm reading
as possible.

Before beginning tests; set the parking brake, place gear selector in P or N and block drive wheels for safety.

1. Warm up the engine to normal operating temperature and let it idle.

2. Install GDS and select INJECTOR #1 parameter on the Actuation Test mode.
3. Monitor engine rpm and shut off the injector #1 by pressing "STRT(F1)" key.
4. Repeat procedure on all injectors and record the engine rpm.

Specification : All cylinders should show an even RPM drop.

1. Was each cylinder's rpm drop within the same value?

▶Go to next step as below.

▶ Cylinders with the least amount of RPM drop are not contributing their share of power.
▶ Go to "Fuel Injector Inspection" procedure and check the suspect cylinders.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 211 of 417

If the RPM loss between cylinders is quite large(200RPM or more) and engine has high mileage,
there is possibility of engine wear. Perform compression test with pressure gauge to check the engine
wear.

Check intake/exhaust system for restriction or leakage

1. Visually/physically inspect the air leakage in intake/exhaust system for the following areas:
'- Vacuum hoses for splits, kinks and improper connections.- Throttle body gasket
'- Throttle body gasket
'- Gasket between intake manifold and cylinder head
'- Seals between intake manifold and fuel injectors
'- Exhaust system between HO2S and Three way catalyst for air leakage
2. Visually/physically inspect the restriction in intake/exhaust system for the following areas:
'- Air cleaner filter element for excessive dirt or for any foreign objects
'- Throttle body inlet for damage or for any foreign objects
'- Throttle bore and throttle plate for chocking and for any foreign objects
'- Restricted exhaust system
3. Was a problem found in any of the above areas?

▶ 'Repair as necessary and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
▶ Go to next step as below.

4. Inspect the leakage in EVAP. system for the following conditions:

(1) Check the EVAP canister for fuel saturation. If the EVAP canister is full of fuel, visually and physically inspect the EVAP
and fuel system.
Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure. If OK, go to next step.
(2) Remove the manifold side vacuum hose from the EVAP canister purge valve.
(3) Using a hand vacuum pump apply specified vacuum(Approx. 15 in, Hg) to the manifold side of the valve.
(4) Does the valve hold vacuum?

▶ Go to next step as below.

▶ Repair air leakage and go to "Verification of Vehicle Repair" procedure.

Sensor Inspection

Refer to "Signal Waveform & Data" in the "General Information" procedure .

1. Visually/physically inspect the HO2S for the following conditions:

- Ensure that the HO2S is securely installed.
- Silicon contamination. This contamination will be indicated by a white powdery coating on the portion of the sensor exposed
to the exhaust stream and this will result in a but false(high) voltage signal.
- Fuel, engine coolant or oil contamination.
- Use of improper sealant.
- If contamination is evident on the HO2S, Fix the source of the sensor contamination before replacing the sensor to prevent
future contamination. Go to "Verification of Vehicle Repair" procedure.
2. Visually/physically inspect the MAFS for the following conditions:
- Contamination or deterioration
- Poor connection or damaged harness
3. Check for an intermittent TPS false signal. TPS signal displayed on a GDSshould increase steadily when depressing
accelerator pedal after starting.
4. Verify that the PCM ground connections are clean and properly tightened.
5. If test result is NG, repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
If OK, go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 212 of 417

If the contamination is evident on the HO2S or MAFS. Fix the source of the sensor contamination before replacing the
sensor to prevent future contamination.

Positive Crankcase Ventilation System Inspection

1. Check the engine oil level. The oil level should be between the min. and max. marking. Fill to the correct oil level
2. Check crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
3. Warm up the engine to normal operating temperature
4. Connect GDSand note the "SHORT TERM FUEL-B1" parameter on the GDSdata list.
5. Disconnect and plug the positive crankcase ventilation at the intake manifold side.
6. Monitor the "SHORT TERM FUEL-B1" parameter on the GDSdata list once again.

Specification : The value should remain more or less unchanged

7. Is the displayed value within the specified value?

▶ Go to next step as below.

▶ Check the PCV(Positive Crankcase Ventilation) valve for operation properly. Refer to "EM" group in
Workshop Manual. If OK, check that engine oil is diluted with fuel. Change the oil or filter as necessary
and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
Fuel System Inspection
1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage.
(3) Inspect fuel pressure with normal idle status.

Specification : 338~348kPa(3.45~3.55kg/cm²)

(4) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Clogged fuel filter Fuel filter
Fuel Pressure too low Fuel leak on the fuel-pressure regulator that Fuel Pump
is assembled on fuel pump (Fuel Pressure Regulator)
Fuel Pressure too Fuel Pump
Sticking fuel pressure regulator
High (Fuel Pressure Regulator)

2. Fuel Pressure Hold Inspection

(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes

(2) Is fuel pressure within the specified value?

▶ Visually/physically inspect the engine mechanical problem for the following:

- Worn cylinder
- Worn valve
- Worn piston or piston ring
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 213 of 417

"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Fuel pressure drops
Injector leak Injector
slowly
Fuel pressure drops
Stuck open in check valve of the fuel pump Fuel pump
immediately

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0172 System too Rich (Bank 1)
General Description
In order to provide the best possible combination of drivability, fuel economy and emission control, the PCM uses a closed loop
air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based it in closed loop fuel control.
Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around
0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that
are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel
trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a
lean or rich condition.

DTC Description
If the lambda controller reaches the maximum or minimum threshold, then feedback control is no longer possible and emissions
will be increased. The PCM sets DTC P2097 if no proportional post catalyst fuel trim adaptation occurs for a defined time after the
lambda controller has reached its minimum threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
• Monitoring deviation of fueling control (Long term + Short
DTC Strategy
term)

• No relevant failure
Enable Conditions
• Estimated fuel dilution in oil limited in rich side • Three Way Catalytic Converter
(TWC)
• Lambda controller + Trim value < -25 ％(more than 60sec.
Threshold Value • Rear HO2S
Within 180sec.)
Diagnostic Time • 60 sec.

Mil On Condition • 2 Driving Cycles

Signal Waveform & Data

1. GDS Display for HO2S

GDS Parameter

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 214 of 417

Test Condition HO2S SNSR VOL.-B1/S1 HO2S SNSR VOL.-B1/S2

Signal is switching from rich
Normal Value when (above 0.45V) to lean(below
Idle after warm up above 0.7V
circuit is normal 0.45V) a minimum of 3 times
in 10 seconds.
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

2. MAPS Terminal voltage with pressure

Pressure (kPa) Approx. 20 Approx. 35 Approx. 60 Approx. 95 Approx. 101

Voltage(V) Approx. 0.7~0.8 Approx. 1.3~1.4 Approx. 2.3~2.4 Approx. 3.7~3.8 Approx. 3.9~4.1

3. GDS Display for TPS

GDS Parameter
Test Condition
TPS VOLTAGE
Normal value with
Accelerator pedal released 0.20~0.47V
ignition "ON" & engine "OFF"
Normal value with engine ON & accelerator pedal fully depressed 4.2~4.7V

cardiagn.com
Power circuit open 0.01V
Ground cicuit open 4.99V
Abnormal value with
TPS signal circuit open 4.99V
ignition "ON" & engine "OFF"
TPS signal circuit short to ground Approx. 0V
TPS signal circuit short to battery Above 4.99V

Monitor DTC Status

If any DTCs relating to INJECTOR,HO2S,ECTS, or MAFS are stored, do ALL REPAIRS associated with those codes before
proceeding with further troubleshooting.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 215 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Monitor Actuation Test

The main purpose of this test is to identify potential engine mechanical condition problems and fuel and ignition systems
problems that are not common to all cylinders. For best results, perform this test while maintaining as steady an rpm reading
as possible.

Before beginning tests; set the parking brake, place gear selector in P or N and block drive wheels for safety.

1. Warm up the engine to normal operating temperature and let it idle.

2. Install GDS and select INJECTOR #1 parameter on the Actuation Test mode.
3. Monitor engine rpm and shut off the injector #1 by pressing "STRT(F1)" key.
4. Repeat procedure on all injectors and record the engine rpm.

Specification : All cylinders should show an even RPM drop.

1. Was each cylinder's rpm drop within the same value?

▶Go to next step as below.

▶ Cylinders with the least amount of RPM drop are not contributing their share of power.
▶ Go to "Fuel Injector Inspection" procedure and check the suspect cylinders.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 216 of 417

If the RPM loss between cylinders is quite large(200RPM or more) and engine has high mileage,
there is possibility of engine wear. Perform compression test with pressure gauge to check the engine
wear.

Check intake/exhaust system for restriction or leakage

1. Visually/physically inspect the air leakage in intake/exhaust system for the following areas:
'- Vacuum hoses for splits, kinks and improper connections.- Throttle body gasket
'- Throttle body gasket
'- Gasket between intake manifold and cylinder head
'- Seals between intake manifold and fuel injectors
'- Exhaust system between HO2S and Three way catalyst for air leakage
2. Visually/physically inspect the restriction in intake/exhaust system for the following areas:
'- Air cleaner filter element for excessive dirt or for any foreign objects
'- Throttle body inlet for damage or for any foreign objects
'- Throttle bore and throttle plate for chocking and for any foreign objects
'- Restricted exhaust system
3. Was a problem found in any of the above areas?

▶ 'Repair as necessary and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
▶ Go to next step as below.

4. Inspect the leakage in EVAP. system for the following conditions:

(1) Check the EVAP canister for fuel saturation. If the EVAP canister is full of fuel, visually and physically inspect the EVAP
and fuel system.
Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure. If OK, go to next step.
(2) Remove the manifold side vacuum hose from the EVAP canister purge valve.
(3) Using a hand vacuum pump apply specified vacuum(Approx. 15 in, Hg) to the manifold side of the valve.
(4) Does the valve hold vacuum?

▶ Go to next step as below.

▶ Repair air leakage and go to "Verification of Vehicle Repair" procedure.

Sensor Inspection

Refer to "Signal Waveform & Data" in the "General Information" procedure .

1. Visually/physically inspect the HO2S for the following conditions:

- Ensure that the HO2S is securely installed.
- Silicon contamination. This contamination will be indicated by a white powdery coating on the portion of the sensor exposed
to the exhaust stream and this will result in a but false(high) voltage signal.
- Fuel, engine coolant or oil contamination.
- Use of improper sealant.
- If contamination is evident on the HO2S, Fix the source of the sensor contamination before replacing the sensor to prevent
future contamination. Go to "Verification of Vehicle Repair" procedure.
2. Visually/physically inspect the MAFS for the following conditions:
- Contamination or deterioration
- Poor connection or damaged harness
3. Check for an intermittent TPS false signal. TPS signal displayed on a GDSshould increase steadily when depressing
accelerator pedal after starting.
4. Verify that the PCM ground connections are clean and properly tightened.
5. If test result is NG, repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
If OK, go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 217 of 417

If the contamination is evident on the HO2S or MAFS. Fix the source of the sensor contamination before replacing the
sensor to prevent future contamination.

Positive Crankcase Ventilation System Inspection

1. Check the engine oil level. The oil level should be between the min. and max. marking. Fill to the correct oil level
2. Check crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
3. Warm up the engine to normal operating temperature
4. Connect GDSand note the "SHORT TERM FUEL-B1" parameter on the GDSdata list.
5. Disconnect and plug the positive crankcase ventilation at the intake manifold side.
6. Monitor the "SHORT TERM FUEL-B1" parameter on the GDSdata list once again.

Specification : The value should remain more or less unchanged

7. Is the displayed value within the specified value?

▶ Go to next step as below.

▶ Check the PCV(Positive Crankcase Ventilation) valve for operation properly. Refer to "EM" group in
Workshop Manual. If OK, check that engine oil is diluted with fuel. Change the oil or filter as necessary
and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
Fuel System Inspection
1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage.
(3) Inspect fuel pressure with normal idle status.

Specification : 338~348kPa(3.45~3.55kg/cm²)

(4) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Clogged fuel filter Fuel filter
Fuel Pressure too low Fuel leak on the fuel-pressure regulator that Fuel Pump
is assembled on fuel pump (Fuel Pressure Regulator)
Fuel Pressure too High Fuel Pump
Sticking fuel pressure regulator
(Fuel Pressure Regulator)

2. Fuel Pressure Hold Inspection

(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes

(2) Is fuel pressure within the specified value?

▶ Visually/physically inspect the engine mechanical problem for the following:

- Worn cylinder
- Worn valve
- Worn piston or piston ring
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 218 of 417

"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Fuel pressure drops
Injector leak Injector
slowly
Fuel pressure drops
Stuck open in check valve of the fuel pump Fuel pump
immediately

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0196 Engine Oil Temperature Sensor-Range /
Performance
Component Location

General Description
The fluid of the CVVT is the engine oil and its density changes according to the engine oil temperature. At this time the Oil
Temperature Sensor (OTS) helps compensation against the temperature differences. The Oil Temperature Sensor measures the
engine oil temperature before the engine oil comes into the Oil-flow Control Valve (OCV).
According to the measured temperature, the Engine Control Module (PCM) compensates the oil-flow control valve operation time.

DTC Description
The purpose of this diagnosis is to detect a stuck oil temperature signal or implausibly low ,high signal. For the stuck signal
detection, the PCM checks whether after a variation of the calculated oil temperature also a variation of the measured oil
temperature is detected and sets DTC P0196 if the variation of the measured oil temperature is lower than the threshold.For the
implausibly high, low signal detection, the PCM compares measured engine oil temperature with calculated oil temperature or
coolant temperature and sets DTC P0196 when one of following conditions is met.
1. Measured oil temperature is implausibly low when calculated oil temperature is high.
2. Measured oil temperature is implausibly high when coolant is low without any relevant failure.
3. Measured oil temp. < threshold but calculated oil temp. > threshold.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 219 of 417

DTC Detecting Condition

Item Detecting Condition Possible Cause

DTC case1 • Sensor signal Stuck

Strategy case2 • Signal plausability

• Engine coolant temperature at start < 40°C(104°F)

case1 • No relevant failure
Enable • 6 < Battery voltage<16V
Conditions
• 6 < Battery voltage < 16V
case2
• No relevant failure • Poor connection or damaged
• Measured oil temperature increase < 10~35°C(50~63°F) harness
case1
(Threshold depends on Coolant temperature at start) • Faulty OTS
Threshold
Value • Measured oil temperature < 20°C(68°F)
case2
• Measured oil temperature > 100°C(212°F)

• 10-30 min. (depends on Engine Coolant Temp. and driving

Diagnostic case1
condition at start)
Time
case2 • 15 seconds.

Mil On Condition • 2 Driving Cycles

cardiagn.com
Specification
Temp.(°C) Temp.(°F) OTS Resistance(kΩ) Temp.(°C) Temp.(°F) OTS Resistance(kΩ)
-20 -4 Approx. 14.1~16.9 40 104 Approx. 1.1~1.2
0 32 Approx. 6 60 140 Approx. 0.5~0.6
20 68 Approx. 2.3~2.6 80 176 Approx. 0.3

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 220 of 417

cardiagn.com
Signal Waveform & Data

Fig 1) Engine Oil Temp. Sensor : Approx. 204.8°F after warm up.(at IG ON)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 221 of 417

Monitor DTC Status

If any DTCs relating to OTS(Oil Temperature Sensor) or ECT(Engine Coolant Temperature)Sensor are stored, do ALL
REPAIRS associated with those codes before proceeding with this troubleshooting tree.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Monitor GDS Data

1. Allow the engine to cool.
2. Run the cold engine at idle for 5 minutes.
3. Check the engine coolant temperature parameter at idle with the GDS.
4. Is the engine coolant temperature increase to above 50°C(122°F)

▶ Go to next step as below.

▶ Check ECTS for contamination, deterioration, poor connection or damaged harness. Repair or replace
as necessary and then go to "Verification of Vehicle Repair" procedure.

Terminal and Connector inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 222 of 417

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect OTS connector.
3. Measure resistance between terminals 1 and 2 of OTS connector.(Component side)
Specification :

Temp.(°C) Temp.(°F) OTS Resistance(kΩ)

-20 -4 Approx. 14.1~16.9
0 32 Approx. 6
20 68 Approx. 2.3~2.6
40 104 Approx. 1.1~1.2

cardiagn.com
60 140 Approx. 0.5~0.6
80 176 Approx. 0.3

4. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check OTS for contamination, deterioration, or damage. Substitute with a known-good OTS and check
for proper operation. If the problem is corrected, replace OTS and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0197 Engine Oil Temperature Sensor Low Input
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 223 of 417

General Description
The fluid of the CVVT is the engine oil and its density changes according to the engine oil temperature. At this time the Oil
Temperature Sensor (OTS) helps compensation against the temperature differences. The Oil Temperature Sensor measures the
engine oil temperature before the engine oil comes into the Oil-flow Control Valve (OCV).
According to the measured temperature, the Engine Control Module (PCM) compensates the oil-flow control valve operation time.

DTC Description
PCM sets DTC P0197 if the PCM detects signal voltage lower than the possible range of a properly operating OTS.

cardiagn.com
DTC Detecting Condition
Item Detecting Condition Possible Cause
DTC Strategy • Voltage Range Check

Enable Conditions • Engine coolant temperature < 100°C(212°F) • Short circuit to ground
• Poor connection or damaged
Threshold Value • Oil temperature > 154°C(309°F)
harness
Diagnostic Time • 5 seconds • Faulty OTS
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) OTS Resistance(kΩ) Temp.(°C) Temp.(°F) OTS Resistance(kΩ)
-20 -4 Approx. 14.1~16.9 40 104 Approx. 1.1~1.2
0 32 Approx. 6 60 140 Approx. 0.5~0.6
20 68 Approx. 2.3~2.6 80 176 Approx. 0.3

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 224 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 225 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Signal Circuit Inspection

1. Ignition "OFF"
2. Disconnect OTS connector
3. Measure resistance between signal terminal of OTS harness connector and chassis ground

Specification : Infinite

4. Is resistance within the specification?

▶ Go to "Terminal and Connector Inspection" procedure.

▶ Repair short to ground in harness and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
Terminal and Connector Inspection
1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to "Component Inspection" procedure.

Component Inspection
1. Measure resistance between terminals 1 and 2 of OTS connector.(Component side)
Specification :

Temp.(°C) Temp.(°F) OTS Resistance(kΩ)

-20 -4 Approx. 14.1~16.9
0 32 Approx. 6
20 68 Approx. 2.3~2.6
40 104 Approx. 1.1~1.2
60 140 Approx. 0.5~0.6
80 176 Approx. 0.3

2. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check OTS for contamination, deterioration, or damage. Substitute with a known-good OTS and check
for proper operation. If the problem is corrected, replace OTS and then go to "Verification of Vehicle
Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 226 of 417

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0198 Engine Oil Temperature Sensor High Input
Component Location

cardiagn.com
General Description
The fluid of the CVVT is the engine oil and its density changes according to the engine oil temperature. At this time the Oil
Temperature Sensor (OTS) helps compensation against the temperature differences. The Oil Temperature Sensor measures the
engine oil temperature before the engine oil comes into the Oil-flow Control Valve (OCV).
According to the measured temperature, the Engine Control Module (PCM) compensates the oil-flow control valve operation time.

DTC Description
PCM sets DTC P0198 if the PCM detects signal voltage higher than the possible range of a properly operating OTS.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Voltage Range Check

Enable Conditions • Time after Start if coolant temperature < -10°C) >5 min. • Open or short circuit to battery
• Poor connection or damaged
Threshold Value • Oil temperature < -36°C(-33°F)
harness
Diagnostic Time • 5 seconds • Faulty OTS
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) OTS Resistance(kΩ) Temp.(°C) Temp.(°F) OTS Resistance(kΩ)
-20 -4 Approx. 14.1~16.9 40 104 Approx. 1.1~1.2
0 32 Approx. 6 60 140 Approx. 0.5~0.6
20 68 Approx. 2.3~2.6 80 176 Approx. 0.3

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 227 of 417

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 228 of 417

5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Ground circuit inspection

1. Ignition "OFF"
2. Disconnect OTS connector
3. Measure resistance between ground terminal of OTS harness connector and chassis ground

Specification : Approx. 0Ω

4. Is resistance within specification?

cardiagn.com
▶ Go to next step as below.

▶ Repair open circuit and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

1. Check the signal circuit for short to battery
(1) Disconnect PCM harness connector
(2) Ignition "ON" & Engine "OFF"
(3) Measure voltage between signal terminal of OTS harness connector and chassis ground

Specification : Approx. 0V

(4) Is voltage within specification?

▶ Go to next step as below.

▶ Check for short to battery in signal circuit. Repair as necessary and go to "Verification of Vehicle
Repair" procedure.

2. Check the signal circuit for open

(1) Ignition "OFF"
(2) Measure resistance between signal terminal of OTS harness connector and OTS signal terminal of PCM harness
connector.
(3) Is voltage within the specification?

▶ Go to next step as below.

▶ Check for open in signal circuit. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 229 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Measure resistance between terminals 1 and 2 of OTS connector.(Component side)
Specification :

Temp.(°C) Temp.(°F) OTS Resistance(kΩ)

-20 -4 Approx. 14.1~16.9
0 32 Approx. 6
20 68 Approx. 2.3~2.6
40 104 Approx. 1.1~1.2
60 140 Approx. 0.5~0.6
80 176 Approx. 0.3

2. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken

cardiagn.com
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check OTS for contamination, deterioration, or damage. Substitute with a known-good OTS and check
for proper operation. If the problem is corrected, replace OTS and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0230 Fuel Pump Primary Circuit
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 230 of 417

General Description
The PCM provides ground to one side of the coil in the fuel pump relay to control the fuel pump relay. The other side of the fuel
pump relay coil is connected to fuel pump relay, which activates when the ignition switch is ON. The PCM monitors the control
circuit between the fuel pump relay and the PCM. When the ignition switch is turned ON, the PCM energizes the fuel pump relay,
which sends power to the fuel pump.

DTC Description
PCM sets DTC P0230 if the PCM detects the fuel pump relay control circuit is open, short to ground or battery.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check

Enable Conditions • 10V < Battery voltage < 16V • Open or short in harness
• Poor connection or damaged
Threshold Value • Shot to Ground/Battery or Line Break
harness
Diagnostic Time • 3 seconds • Faulty fuel pump relay
Mil On Condition •-

cardiagn.com
Diagnostic Circuit Diagram

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 231 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. With Ignition OFF, remove the fuel pump relay
2. Measure resistance between terminals 85 and 86 of the fuel pump relay(Component side)

Specification : Approx. 70~120Ω at 20°C(68°F)

3. Apply 12V and a ground to 85 and 86 terminals of the fuel pump relay(Components side).

4. Check if the main relay works well when it is energized. (If the fuel pump relay works normally, a clicking sound can be heard.)
5. Does the fuel pump relay operate normally?

▶ Go to next step as below.

▶ Check fuel pump relay for contamination, deterioration, or damage. Substitute with a known-good fuel

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 232 of 417

pump relay and check for proper operation. If the problem is corrected, replace fuel pump relay and then
go to "Verification of Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power supply terminals of fuel pump relay harness and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for an open or short to ground in the power supply circuit. Repair as necessary and go to
"Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Measure voltage between control terminal of Fuel Pump Relay harness connector and chassis ground.

Specification : 4~5V

cardiagn.com
2. Is voltage within the specification?

▶ Go to next step as below.

▶ Check for open or short in control circuit. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Thoroughly check for poor connection between PCM and component: backed out terminal, improper
mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of
Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0261 Cylinder 1 Injector Circuit Low
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 233 of 417

General Description
Based on information from various sensors, the PCM measures the fuel injection amount. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The PCM controls each injector by
grounding the control circuit. When the PCM energizes the injector by grounding the control circuit, the circuit voltage should be
low (theoretically 0V) and the fuel is injected. When the PCM de-energizes the injector by opening the control circuit, the fuel
injector is closed and circuit voltage should momentarily peak.

DTC Description

cardiagn.com
PCM sets DTC P0261 if the PCM detects that injector (Cylinder #1) control circuit is shorted to ground.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check
• Open in power supply harness
• 10V < Battery voltage < 16V
Enable Conditions • Short to ground in control
• Engine speed(rpm) >30
harness
Threshold Value • Short to ground • Poor connection or damaged
harness
Diagnostic Time • 1.5 sec.
• Faulty injector
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance (Ω)
20 68 13.8~15.2

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 234 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 235 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect injector connector
3. Measure resistance between control terminal and power terminal of the injector connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance (Ω)

20 68 13.8~15.2

4. Is resistance within the specification?

cardiagn.com
▶ Go to next step as below.

▶ Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and
check for proper operation. If the problem is corrected, replace injector and then go to "Verification of
Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power terminal of the injector harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the Injector.
▶ Check for open or blown 10A injector fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Check for short to ground in control circuit.
(1) Ignition "OFF".
(2) Measure resistance between control terminal of the injector harness connector and chassis ground.

Specification : Infinite

2. Is resistance within the specification?

▶ Go to next step as below.

▶ Repair open or short to ground in control harness and go to "Verification of Vehicle Repair" procedure .

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 236 of 417

interference from other electrical systems, and mechanical or chemical damage.

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0262 Cylinder 1 Injector Circuit High
Component Location

General Description
Based on information from various sensors, the PCM measures the fuel injection amount. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The PCM controls each injector by
grounding the control circuit. When the PCM energizes the injector by grounding the control circuit, the circuit voltage should be
low (theoretically 0V) and the fuel is injected. When the PCM de-energizes the injector by opening control circuit, the fuel injector
is closed and circuit voltage should momentarily peak.

DTC Description
PCM sets DTC P0262 if the PCM detects that injector (Cylinder #1) control circuit is open or shorted to battery voltage.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check

• 10V < Battery voltage < 16V • Open or short to battery in control
Enable Conditions
• Engine speed(rpm) >30 harness.
• Open or short to battery in control
Threshold Value • Short to battery or Line break

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 237 of 417

Diagnostic Time • 1.5 sec. harness.

• Faulty injector
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance (Ω)
20 68 13.8~15.2

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 238 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect injector connector
3. Measure resistance between control terminal and power terminal of the injector connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance (Ω)

20 68 13.8~15.2

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and
check for proper operation. If the problem is corrected, replace injector and then go to "Verification of
Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power terminal of the injector harness connector and chassis ground.

Specification : Approx. B+

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 239 of 417

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the Injector.
▶ Check for open or blown 15A injector fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Measure voltage between control terminal of the injector harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Check control circuit for open or short. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

cardiagn.com
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0264 Cylinder 2 Injector Circuit Low
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 240 of 417

General Description
Based on information from various sensors, the PCM measures the fuel injection amount. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The PCM controls each injector by
grounding the control circuit. When the PCM energizes the injector by grounding the control circuit, the circuit voltage should be
low (theoretically 0V) and the fuel is injected. When the PCM de-energizes the injector by opening control circuit, the fuel injector
is closed and circuit voltage should momentarily peak.

DTC Description

cardiagn.com
PCM sets DTC P0264 if the PCM detects that injector (Cylinder #2) control circuit is shorted to ground.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check
• Open in power supply harness
• 10V < Battery voltage < 16V
Enable Conditions • Short to ground in control
• Engine speed(rpm) >30
harness
Threshold Value • Short to ground • Poor connection or damaged
harness
Diagnostic Time • 1.5 sec.
• Faulty injector
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance (Ω)
20 68 13.8~15.2

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 241 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 242 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect injector connector
3. Measure resistance between control terminal and power terminal of the injector connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance (Ω)

20 68 13.8~15.2

4. Is resistance within the specification?

cardiagn.com
▶ Go to next step as below.

▶ Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and
check for proper operation. If the problem is corrected, replace injector and then go to "Verification of
Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power terminal of the injector harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the Injector.
▶ Check for open or blown 10A injector fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Check for short to ground in control circuit.
(1) Ignition "OFF".
(2) Measure resistance between control terminal of the injector harness connector and chassis ground.

Specification : Infinite

2. Is resistance within the specification?

▶ Go to next step as below.

▶ Repair open or short to ground in control harness and go to "Verification of Vehicle Repair" procedure .

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 243 of 417

interference from other electrical systems, and mechanical or chemical damage.

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0265 Cylinder 2 Injector Circuit High
Component Location

General Description
Based on information from various sensors, the PCM measures the fuel injection amount. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The PCM controls each injector by
grounding the control circuit. When the PCM energizes the injector by grounding the control circuit, the circuit voltage should be
low (theoretically 0V) and the fuel is injected. When the PCM de-energizes the injector by opening control circuit, the fuel injector
is closed and circuit voltage should momentarily peak.

DTC Description
PCM sets DTC P0265 if the PCM detects that injector (Cylinder #2) control circuit is open or shorted to battery voltage.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check

• 10V < Battery voltage < 16V • Open or short to battery in control
Enable Conditions
• Engine speed(rpm) >30 harness.
• Poor connection or damaged
Threshold Value • Short to battery or Line break

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 244 of 417

Diagnostic Time • 1.5 sec. harness

• Faulty injector
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance (Ω)
20 68 13.8~15.2

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 245 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect injector connector
3. Measure resistance between control terminal and power terminal of the injector connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance (Ω)

20 68 13.8~15.2

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and
check for proper operation. If the problem is corrected, replace injector and then go to "Verification of
Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power terminal of the injector harness connector and chassis ground.

Specification : Approx. B+

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 246 of 417

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the Injector.
▶ Check for open or blown 15A injector fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Measure voltage between control terminal of the injector harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Check control circuit for open or short. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

cardiagn.com
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0267 Cylinder 3 Injector Circuit Low
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 247 of 417

General Description
Based on information from various sensors, the ECM measures the fuel injection amount. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The ECM controls each injector by
grounding the control circuit. When the ECM energizes the injector by grounding the control circuit, the circuit voltage should be
low (theoretically 0V) and the fuel is injected. When the ECM de-energizes the injector by opening control circuit, the fuel injector
is closed and circuit voltage should momentarily peak.

DTC Description

cardiagn.com
ECM sets DTC P0267 if the ECM detects that injector (Cylinder #3) control circuit is shorted to ground.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check
• Open in power supply harness
• 10V < Battery voltage < 16V
Enable Conditions • Short to ground in control
• Engine speed(rpm) >30
harness
Threshold Value • Short to ground • Poor connection or damaged
harness
Diagnostic Time • 1.5 sec.
• Faulty injector
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance (Ω)
20 68 13.8~15.2

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 248 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 249 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect injector connector
3. Measure resistance between control terminal and power terminal of the injector connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance (Ω)

20 68 13.8~15.2

4. Is resistance within the specification?

cardiagn.com
▶ Go to next step as below.

▶ Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and
check for proper operation. If the problem is corrected, replace injector and then go to "Verification of
Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power terminal of the injector harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the Injector.
▶ Check for open or blown 10A injector fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Check for short to ground in control circuit.
(1) Ignition "OFF".
(2) Measure resistance between control terminal of the injector harness connector and chassis ground.

Specification : Infinite

2. Is resistance within the specification?

▶ Go to next step as below.

▶ Repair open or short to ground in control harness and go to "Verification of Vehicle Repair" procedure .

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 250 of 417

interference from other electrical systems, and mechanical or chemical damage.

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0268 Cylinder 3 Injector Circuit High
Component Location

General Description
Based on information from various sensors, the PCM measures the fuel injection amount. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The PCM controls each injector by
grounding the control circuit. When the PCM energizes the injector by grounding the control circuit, the circuit voltage should be
low (theoretically 0V) and the fuel is injected. When the PCM de-energizes the injector by opening control circuit, the fuel injector
is closed and circuit voltage should momentarily peak.

DTC Description
PCM sets DTC P0268 if the PCM detects that injector (Cylinder #3) control circuit is open or shorted to battery voltage.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check

• 10V < Battery voltage < 16V • Open or short to battery in control
Enable Conditions
• Engine speed(rpm) >30 harness.
• Poor connection or damaged
Threshold Value • Short to battery or Line break

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 251 of 417

Diagnostic Time • 1.5 sec. harness

• Faulty injector
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance (Ω)
20 68 13.8~15.2

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 252 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect injector connector
3. Measure resistance between control terminal and power terminal of the injector connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance (Ω)

20 68 13.8~15.2

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and
check for proper operation. If the problem is corrected, replace injector and then go to "Verification of
Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power terminal of the injector harness connector and chassis ground.

Specification : Approx. B+

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 253 of 417

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the Injector.
▶ Check for open or blown 15A injector fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Measure voltage between control terminal of the injector harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Check control circuit for open or short. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

cardiagn.com
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0270 Cylinder 4 Injector Circuit Low
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 254 of 417

General Description
Based on information from various sensors, the ECM measures the fuel injection amount. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The ECM controls each injector by
grounding the control circuit. When the ECM energizes the injector by grounding the control circuit, the circuit voltage should be
low (theoretically 0V) and the fuel is injected. When the ECM de-energizes the injector by opening control circuit, the fuel injector
is closed and circuit voltage should momentarily peak.

DTC Description

cardiagn.com
ECM sets DTC P0270 if the ECM detects that injector (Cylinder #4) control circuit is shorted to ground.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check
• Open in power supply harness
• 10V < Battery voltage < 16V
Enable Conditions • Short to ground in control
• Engine speed(rpm) >30
harness
Threshold Value • Short to ground • Poor connection or damaged
harness
Diagnostic Time • 1.5 sec.
• Faulty injector
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance (Ω)
20 68 13.8~15.2

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 255 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 256 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect injector connector
3. Measure resistance between control terminal and power terminal of the injector connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance (Ω)

20 68 13.8~15.2

4. Is resistance within the specification?

cardiagn.com
▶ Go to next step as below.

▶ Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and
check for proper operation. If the problem is corrected, replace injector and then go to "Verification of
Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power terminal of the injector harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the Injector.
▶ Check for open or blown 10A injector fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Check for short to ground in control circuit.
(1) Ignition "OFF".
(2) Measure resistance between control terminal of the injector harness connector and chassis ground.

Specification : Infinite

2. Is resistance within the specification?

▶ Go to next step as below.

▶ Repair open or short to ground in control harness and go to "Verification of Vehicle Repair" procedure .

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 257 of 417

interference from other electrical systems, and mechanical or chemical damage.

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0271 Cylinder 4 Injector Circuit High
Component Location

General Description
Based on information from various sensors, the PCM measures the fuel injection amount. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of time the fuel injector is held open. The PCM controls each injector by
grounding the control circuit. When the PCM energizes the injector by grounding the control circuit, the circuit voltage should be
low (theoretically 0V) and the fuel is injected. When the PCM de-energizes the injector by opening control circuit, the fuel injector
is closed and circuit voltage should momentarily peak.

DTC Description
PCM sets DTC P0271 if the PCM detects that injector (Cylinder #4) control circuit is open or shorted to battery voltage.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical Check

• 10V < Battery voltage < 16V • Open or short to battery in control
Enable Conditions
• Engine speed(rpm) >30 harness.
• Poor connection or damaged
Threshold Value • Short to battery or Line break

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 258 of 417

Diagnostic Time • 1.5 sec. harness

• Faulty injector
Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Resistance (Ω)
20 68 13.8~15.2

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 259 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect injector connector
3. Measure resistance between control terminal and power terminal of the injector connector. (Component side)
Specification :

Temp.(°C) Temp.(°F) Resistance (Ω)

20 68 13.8~15.2

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Check injector for contamination, deterioration, or damage. Substitute with a known-good injector and
check for proper operation. If the problem is corrected, replace injector and then go to "Verification of
Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between power terminal of the injector harness connector and chassis ground.

Specification : Approx. B+

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 260 of 417

3. Is voltage within the specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the Injector.
▶ Check for open or blown 15A injector fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Measure voltage between control terminal of the injector harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Check control circuit for open or short. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

cardiagn.com
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0300 Random/Multiple Cylinder Misfire Detected
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 261 of 417

General Description
The Misfire monitor diagnostic is based on crankshaft rotation velocity variation. The ECM determines crankshaft rotational
velocity using the crankshaft position sensor and camshaft position sensor. When a cylinder misfires the crankshaft slows down
momentarily. By monitoring the crankshaft and camshaft position sensor signals, the ECM can calculate when a misfire occurs.
For a non-catalyst damaging misfire, the diagnostic will be required to report a misfire present within 1000-3200 engine
revolutions. For catalyst damaging misfire, the diagnostic will respond to monitor 200 engine revolutions. Rough roads may cause
false misfire detection. The rough road(acceleration)sensor consists of a piezoelectric vibration pick up which detects vertical
acceleration of the vehicle. The sensor signal is used by the ECM to determine the degree of vertical movement of the car, for
example, on a bumpy road. Since this may also cause uneven engine running, the ECM uses the signal to distinguish the

cardiagn.com
phenomenon from actual misfiring.

DTC Description
If the ECM detects that engine speed variation indicates a misfire sufficient to cause three-way catalyst converter damage or
emissions level to exceed standard value, the ECM sets misfire DTC. If the misfire rate is high enough to damage the catalyst,
the MIL will flash to alert the vehicle operator. With a more than two cylinder misfire detection, the ECM sets P0300.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Calculation of engine roughness

• 156 < Mass air flow(mg/rev.) < 710 (depends on RPM ,

Coolant temp.)
• 512 < Engine speed(RPM) < 6500 • Faulty spark plugs, high-tension
• 141 < Throttle gradient(°TPS/sec.) < 199 lead, or Ignition coil
• Coolant temperature > 20°C (-4°F) if Start temperature < - • Incorrect valve timing
Enable Conditions
7°C (19.4°F) • Uneven compression
• No rough road • Air leakage
• No relevant failure • Improper Fuel pressure or dirty
• 11V< Battery voltage fuel.
• Fuel cut off not active • Blocked/Leaking injectors
Threshold Value • Misfire detected on 2 or more cylinders • Leakage between cooling system
and cylinder
• When misfire rate is high enough to damage the catalyst :
Immediate
Mil On Condition
• When emissions level to exceed standard value : 2 Driving
Cycles

Specification
Temp.(°C) Temp.(°F) Primary ignition coil (Ω) Secondary ignition coil(kΩ)
20 68 0.5~0.6 7.5~10.2

Monitor DTC Status

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 262 of 417

If any DTCs related to injectors, HO2S, ECT(Engine Coolant Temperature)Sensor, Throttle Position sensor or Mass Air Flow
Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting procedure. If
the misfire rate is high enough to cause possible catalyst damage(if the MIL was blinking), ensure that the monitoring for
DTC P0420 is completed and passed after verifying the misfire repair.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and
ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ If any misfire DTCs related to companion cylinders{P0301(Cylinder1)&P0304(Cylinder4), P0302
(Cylinder2))&P0303(Cylinder3)} are also stored, go to "Ignition System Inspection" procedure.If not, go to
next step as below.

Visual Inspection
1. Visually/physically inspect for the following conditions
- Vacuum hoses in engine room for splits, kinks and improper installation
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
- Verify that the ECM ground connections are clean and properly tightened.
2. Check MAFS and ECTS for the following conditions:
- Contamination, deterioration, poor connection or damaged harness
- The MAF signal displayed on the scantool should increase as engine speed increases
- The engine coolant temperature displayed on the scantool should close to the actual coolant temperature.
3. Was a problem found in any of the above areas?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 263 of 417

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

Timing Inspection
1. With ignition "OFF", set up an oscilloscope as follows :
Channel A (+): terminal 3 of the Crankshaft Position Sensor(CKPS), (-): ground
Channel B (+): terminal 3 of the Camshaft Position Sensor(CMPS), (-): ground
2. Start the engine and check for signal waveform whether synchronize with camshaft sensor or not.

cardiagn.com
Fig.1)The CMPS falling(rising) edge is coincided with 3~5 tooth of the CKP from one longer signal(missing tooth)
3. Is the signal waveform normal?

▶ Go to next step as below.

▶ Repair or readjust as necessary, if air gap of the CKPS is exceeds specification [0.3~1.7 mm
(0.012~0.067 in)]. If OK, check that the crankshaft and camshaft are correctly aligned the matching marks
of the pulleys. Repair or readjust as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition System Inspection

1. Spark Plug Cable & Ignition Coil Inspection
(1) Visually/physically inspect the spark plug cable and ignition coil related to the misfiring cylinder(s) for the following
conditions.
- Damage, cracks, carbon and flashover
- Poor connection or damaged harness
- Connected to the incorrect cylinders at the ignition coil and spark plug
(2) Measure the resistance of the spark plug cable related to the misfiring cylinder(s)

Specification : 5.6kΩ/m ±20%

(3) Measure the resistance of the primary and secondary ignition coil related to the misfiring cylinder(s)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 264 of 417

Specification : Primary Ignition Coil Resistance : Approx. 0.5~0.6Ω at 20°C(68°F)

Secondary Ignition Coil Resistance : Approx. 7.5~10.2kΩ at 20°C(68°F)

(4) Was a problem found in any of the above areas?

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

2. Spark Plug Inspection

(1) Visually/physically inspect the spark plug related to the misfiring cylinder(s) for the following conditions
- Damaged insulation, Worn electrodes, Oil or fuel fouled, Loose terminals and cracks
- Check for electrode gap : 1.0 - 1.1 mm (0.039 - 0.043 in.)
- Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
(2) Was a problem found in any of the above areas?

▶ Replace or adjust as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Fuel System Inspection

cardiagn.com
1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage
(3) Inspect fuel pressure with normal idle status

Specification : 338~348kPa(3.45~3.55kg/cm²)

(4) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Clogged fuel filter Fuel filter
Fuel Pressure too low Fuel leak on the fuel-pressure regulator that is
Fuel Pump(Fuel Pressure Regulator)
assembled on fuel pump
Fuel Pressure too High Sticking fuel pressure regulator Fuel Pump(Fuel Pressure Regulator)

2. Fuel Pressure Hold Inspection

(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes

(2) Is fuel pressure within the specified value?

▶ Go to next step as below

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Fuel pressure drops slowly Injector leak Injector
Fuel pressure drops
Stuck open in check valve of the fuel pump Fuel pump
immediately

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 265 of 417

Engine Compression Test

1. Warm up the engine to normal operating temperature. Verify the battery must be at or near full charge.
2. With ignition "OFF", disconnect the ignition coil connectors and the spark plug cables
3. Install compression pressure gauge to the spark plug hole.
4. With wide open throttle by hand, cranking the engine and record the compression readings from all of the cylinders

Specification : Compression pressure : 1,283kPa (13.0kgf/cm², 185psi)

Minimum pressure : 1,135kPa (11.5kgf/cm², 164psi)
Difference between each cylinder : 100kPa (1.0kgf/cm², 15psi) or less

5. Is compression pressure within the specified value?

▶ Verify if the engine has excessive coolant consumption. If yes, check for damaged inlet water passage,
engine block, cylinder head or head gasket. Repair or replace as necessary and go to "Verification of
Vehicle Repair" procedure.
▶ If the cylinder compression in 1 or more cylinders is low, pour a small amount of engine oil into the
cylinder through the spark plug hole and repeat compression test for cylinders with low compression
pressure.- If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are
worn or damaged.- If pressure stays low, a valve may be sticking or seating is improper, or there may be
leakage past the gasket. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.

cardiagn.com
Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0301 Cylinder 1-Misfire detected
Component Location

General Description
The Misfire monitor diagnostic is based on crankshaft rotation velocity variation. The PCM determines crankshaft rotational
velocity using the crankshaft position sensor and camshaft position sensor. When a cylinder misfires the crankshaft slows down
momentarily. By monitoring the crankshaft and camshaft position sensor signals, the PCM can calculate when a misfire occurs.
For a non-catalyst damaging misfire, the diagnostic will be required to report a misfire present within 1000-3200 engine

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 266 of 417

revolutions. For catalyst damaging misfire, the diagnostic will respond to monitor 200 engine revolutions. Rough roads may cause
false misfire detection. The rough road(acceleration)sensor consists of a piezoelectric vibration pick up which detects vertical
acceleration of the vehicle. The sensor signal is used by the PCM to determine the degree of vertical movement of the car, for
example, on a bumpy road. Since this may also cause uneven engine running, the PCM uses the signal to distinguish the
phenomenon from actual misfiring.

DTC Description
If the PCM detects that engine speed variation indicates a misfire sufficient to cause three-way catalyst converter damage or
emissions level to exceed standard value, the PCM sets DTC P0301. If the misfire rate is high enough to damage the catalyst, the
MIL will flash to alert the vehicle operator.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Calculation of engine roughness

• 156 < Mass air flow(mg/rev.) < 710 (depends on RPM ,

Coolant temp.)
• 512 < Engine speed(RPM) < 6500
• 141 < Throttle gradient(°TPS/sec.) < 199
• Coolant temperature > 20°C (-4°F) if Start temperature < - • Faulty spark plugs, high-tension
Enable Conditions
7°C (19.4°F) lead, or Ignition coil
• No rough road • Incorrect valve timing

cardiagn.com
• No relevant failure • Uneven compression
• 11V< Battery voltage • Air leakage
• Fuel cut off not active • Improper Fuel pressure or dirty
fuel.
• Misfire = 12~54% within 200 rev.(Catalyst temperature
Threshold Case1 • Blocked/Leaking injectors
>1050°C (1922°F))
Value • Leakage between cooling system
Case2 • Misfire = 1.2% within 1000 rev. and cylinder

Diagnosis Case1 • 200 revolution or 3*200 revolution

Time Case2 • 1000 revolution or 4*1000 revolution

Mil On Case1 • Immediate

Condition Case2 • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Primary ignition coil (Ω) Secondary ignition coil(kΩ)
20 68 0.5~0.6 7.5~10.2

Monitor DTC Status

If any DTCs related to injectors, HO2S, ECT(Engine Coolant Temperature)Sensor, Throttle Position sensor or Mass Air Flow
Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting procedure. If
the misfire rate is high enough to cause possible catalyst damage(if the MIL was blinking), ensure that the monitoring for
DTC P0420 is completed and passed after verifying the misfire repair.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 267 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and
ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ If any misfire DTCs related to companion cylinders{P0301(Cylinder1)&P0304(Cylinder4), P0302
(Cylinder2))&P0303(Cylinder3)} are also stored, go to "Ignition System Inspection" procedure.If not, go to
next step as below.

Visual Inspection
1. Visually/physically inspect for the following conditions
- Vacuum hoses in engine room for splits, kinks and improper installation
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
- Verify that the ECM ground connections are clean and properly tightened.
2. Check MAFS and ECTS for the following conditions:
- Contamination, deterioration, poor connection or damaged harness
- The MAF signal displayed on the scantool should increase as engine speed increases
- The engine coolant temperature displayed on the scantool should close to the actual coolant temperature.
3. Was a problem found in any of the above areas?

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Timing Inspection
1. With ignition "OFF", set up an oscilloscope as follows :
Channel A (+): terminal 3 of the Crankshaft Position Sensor(CKPS), (-): ground
Channel B (+): terminal 3 of the Camshaft Position Sensor(CMPS), (-): ground
2. Start the engine and check for signal waveform whether synchronize with camshaft sensor or not.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 268 of 417

cardiagn.com
Fig.1)The CMPS falling(rising) edge is coincided with 3~5 tooth of the CKP from one longer signal(missing tooth)
3. Is the signal waveform normal?

▶ Go to next step as below.

▶ Repair or readjust as necessary, if air gap of the CKPS is exceeds specification [0.3~1.7 mm
(0.012~0.067 in)]. If OK, check that the crankshaft and camshaft are correctly aligned the matching marks
of the pulleys. Repair or readjust as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition System Inspection

1. Spark Plug Cable & Ignition Coil Inspection
(1) Visually/physically inspect the spark plug cable and ignition coil related to the misfiring cylinder(s) for the following
conditions.
- Damage, cracks, carbon and flashover
- Poor connection or damaged harness
- Connected to the incorrect cylinders at the ignition coil and spark plug
(2) Measure the resistance of the spark plug cable related to the misfiring cylinder(s)

Specification : 5.6kΩ/m ±20%

(3) Measure the resistance of the primary and secondary ignition coil related to the misfiring cylinder(s)

Specification : Primary Ignition Coil Resistance : Approx. 0.5~0.6Ω at 20°C(68°F)

Secondary Ignition Coil Resistance : Approx. 7.5~10.2kΩ at 20°C(68°F)

(4) Was a problem found in any of the above areas?

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

2. Spark Plug Inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 269 of 417

(1) Visually/physically inspect the spark plug related to the misfiring cylinder(s) for the following conditions
- Damaged insulation, Worn electrodes, Oil or fuel fouled, Loose terminals and cracks
- Check for electrode gap : 1.0 - 1.1 mm (0.039 - 0.043 in.)
- Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
(2) Was a problem found in any of the above areas?

▶ Replace or adjust as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Fuel System Inspection

1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage
(3) Inspect fuel pressure with normal idle status

Specification : 338~348kPa(3.45~3.55kg/cm²)

(4) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to

cardiagn.com
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Clogged fuel filter Fuel filter
Fuel Pressure too low Fuel leak on the fuel-pressure regulator that is
Fuel Pump(Fuel Pressure Regulator)
assembled on fuel pump
Fuel Pressure too High Sticking fuel pressure regulator Fuel Pump(Fuel Pressure Regulator)

2. Fuel Pressure Hold Inspection

(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes

(2) Is fuel pressure within the specified value?

▶ Go to next step as below

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Fuel pressure drops slowly Injector leak Injector
Fuel pressure drops
Stuck open in check valve of the fuel pump Fuel pump
immediately

Engine Compression Test

1. Warm up the engine to normal operating temperature. Verify the battery must be at or near full charge.
2. With ignition "OFF", disconnect the ignition coil connectors and the spark plug cables
3. Install compression pressure gauge to the spark plug hole.
4. With wide open throttle by hand, cranking the engine and record the compression readings from all of the cylinders

Specification : Compression pressure : 1,283kPa (13.0kgf/cm², 185psi)

Minimum pressure : 1,135kPa (11.5kgf/cm², 164psi)
Difference between each cylinder : 100kPa (1.0kgf/cm², 15psi) or less

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 270 of 417

5. Is compression pressure within the specified value?

▶ Verify if the engine has excessive coolant consumption. If yes, check for damaged inlet water passage,
engine block, cylinder head or head gasket. Repair or replace as necessary and go to "Verification of
Vehicle Repair" procedure.
▶ If the cylinder compression in 1 or more cylinders is low, pour a small amount of engine oil into the
cylinder through the spark plug hole and repeat compression test for cylinders with low compression
pressure.- If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are
worn or damaged.- If pressure stays low, a valve may be sticking or seating is improper, or there may be
leakage past the gasket. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0302 Cylinder 2-Misfire detected
Component Location

General Description
The Misfire monitor diagnostic is based on crankshaft rotation velocity variation. The PCM determines crankshaft rotational
velocity using the crankshaft position sensor and camshaft position sensor. When a cylinder misfires the crankshaft slows down
momentarily. By monitoring the crankshaft and camshaft position sensor signals, the PCM can calculate when a misfire occurs.
For a non-catalyst damaging misfire, the diagnostic will be required to report a misfire present within 1000-3200 engine
revolutions. For catalyst damaging misfire, the diagnostic will respond to monitor 200 engine revolutions. Rough roads may cause
false misfire detection. The rough road(acceleration)sensor consists of a piezoelectric vibration pick up which detects vertical
acceleration of the vehicle. The sensor signal is used by the PCM to determine the degree of vertical movement of the car, for
example, on a bumpy road. Since this may also cause uneven engine running, the PCM uses the signal to distinguish the
phenomenon from actual misfiring.

DTC Description
If the PCM detects that engine speed variation indicates a misfire sufficient to cause three-way catalyst converter damage or
emissions level to exceed standard value, the PCM sets DTC P0302. If the misfire rate is high enough to damage the catalyst, the
MIL will flash to alert the vehicle operator.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 271 of 417

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Calculation of engine roughness

• 156 < Mass air flow(mg/rev.) < 710 (depends on RPM ,

Coolant temp.)
• 512 < Engine speed(RPM) < 6500
• 141 < Throttle gradient(°TPS/sec.) < 199
• Coolant temperature > 20°C (-4°F) if Start temperature < - • Faulty spark plugs, high-tension
Enable Conditions
7°C (19.4°F) lead, or Ignition coil
• No rough road • Incorrect valve timing
• No relevant failure • Uneven compression
• 11V< Battery voltage • Air leakage
• Fuel cut off not active • Improper Fuel pressure or dirty
fuel.
• Misfire = 12~54% within 200 rev.(Catalyst temperature
Threshold Case1 • Blocked/Leaking injectors
>1050°C (1922°F))
Value • Leakage between cooling system
Case2 • Misfire = 1.2% within 1000 rev. and cylinder

Diagnosis Case1 • 200 revolution or 3*200 revolution

Time Case2 • 1000 revolution or 4*1000 revolution

cardiagn.com
Mil On Case1 • Immediate
Condition Case2 • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Primary ignition coil (Ω) Secondary ignition coil(kΩ)
20 68 0.5~0.6 7.5~10.2

Monitor DTC Status

If any DTCs related to injectors, HO2S, ECT(Engine Coolant Temperature)Sensor, Throttle Position sensor or Mass Air Flow
Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting procedure. If
the misfire rate is high enough to cause possible catalyst damage(if the MIL was blinking), ensure that the monitoring for
DTC P0420 is completed and passed after verifying the misfire repair.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 272 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and
ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ If any misfire DTCs related to companion cylinders{P0301(Cylinder1)&P0304(Cylinder4), P0302
(Cylinder2))&P0303(Cylinder3)} are also stored, go to "Ignition System Inspection" procedure.If not, go to
next step as below.

Visual Inspection
1. Visually/physically inspect for the following conditions
- Vacuum hoses in engine room for splits, kinks and improper installation
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
- Verify that the ECM ground connections are clean and properly tightened.
2. Check MAFS and ECTS for the following conditions:
- Contamination, deterioration, poor connection or damaged harness
- The MAF signal displayed on the scantool should increase as engine speed increases
- The engine coolant temperature displayed on the scantool should close to the actual coolant temperature.
3. Was a problem found in any of the above areas?

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Timing Inspection
1. With ignition "OFF", set up an oscilloscope as follows :
Channel A (+): terminal 3 of the Crankshaft Position Sensor(CKPS), (-): ground
Channel B (+): terminal 3 of the Camshaft Position Sensor(CMPS), (-): ground
2. Start the engine and check for signal waveform whether synchronize with camshaft sensor or not.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 273 of 417

cardiagn.com
Fig.1)The CMPS falling(rising) edge is coincided with 3~5 tooth of the CKP from one longer signal(missing tooth)
3. Is the signal waveform normal?

▶ Go to next step as below.

▶ Repair or readjust as necessary, if air gap of the CKPS is exceeds specification [0.3~1.7 mm
(0.012~0.067 in)]. If OK, check that the crankshaft and camshaft are correctly aligned the matching marks
of the pulleys. Repair or readjust as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition System Inspection

1. Spark Plug Cable & Ignition Coil Inspection
(1) Visually/physically inspect the spark plug cable and ignition coil related to the misfiring cylinder(s) for the following
conditions.
- Damage, cracks, carbon and flashover
- Poor connection or damaged harness
- Connected to the incorrect cylinders at the ignition coil and spark plug
(2) Measure the resistance of the spark plug cable related to the misfiring cylinder(s)

Specification : 5.6kΩ/m ±20%

(3) Measure the resistance of the primary and secondary ignition coil related to the misfiring cylinder(s)

Specification : Primary Ignition Coil Resistance : Approx. 0.5~0.6Ω at 20°C(68°F)

Secondary Ignition Coil Resistance : Approx. 7.5~10.2kΩ at 20°C(68°F)

(4) Was a problem found in any of the above areas?

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

2. Spark Plug Inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 274 of 417

(1) Visually/physically inspect the spark plug related to the misfiring cylinder(s) for the following conditions
- Damaged insulation, Worn electrodes, Oil or fuel fouled, Loose terminals and cracks
- Check for electrode gap : 1.0 - 1.1 mm (0.039 - 0.043 in.)
- Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
(2) Was a problem found in any of the above areas?

▶ Replace or adjust as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Fuel System Inspection

1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage
(3) Inspect fuel pressure with normal idle status

Specification : 338~348kPa(3.45~3.55kg/cm²)

(4) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to

cardiagn.com
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Clogged fuel filter Fuel filter
Fuel Pressure too low Fuel leak on the fuel-pressure regulator that is
Fuel Pump(Fuel Pressure Regulator)
assembled on fuel pump
Fuel Pressure too High Sticking fuel pressure regulator Fuel Pump(Fuel Pressure Regulator)

2. Fuel Pressure Hold Inspection

(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes

(2) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Fuel pressure drops slowly Injector leak Injector
Fuel pressure drops
Stuck open in check valve of the fuel pump Fuel pump
immediately

Engine Compression Test

1. Warm up the engine to normal operating temperature. Verify the battery must be at or near full charge.
2. With ignition "OFF", disconnect the ignition coil connectors and the spark plug cables
3. Install compression pressure gauge to the spark plug hole.
4. With wide open throttle by hand, cranking the engine and record the compression readings from all of the cylinders

Specification : Compression pressure : 1,283kPa (13.0kgf/cm², 185psi)

Minimum pressure : 1,135kPa (11.5kgf/cm², 164psi)
Difference between each cylinder : 100kPa (1.0kgf/cm², 15psi) or less

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 275 of 417

5. Is compression pressure within the specified value?

▶ Verify if the engine has excessive coolant consumption. If yes, check for damaged inlet water passage,
engine block, cylinder head or head gasket. Repair or replace as necessary and go to "Verification of
Vehicle Repair" procedure.
▶ If the cylinder compression in 1 or more cylinders is low, pour a small amount of engine oil into the
cylinder through the spark plug hole and repeat compression test for cylinders with low compression
pressure.- If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are
worn or damaged.- If pressure stays low, a valve may be sticking or seating is improper, or there may be
leakage past the gasket. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0303 Cylinder 3-Misfire detected
Component Location

General Description
The Misfire monitor diagnostic is based on crankshaft rotation velocity variation. The ECM determines crankshaft rotational
velocity using the crankshaft position sensor and camshaft position sensor. When a cylinder misfires the crankshaft slows down
momentarily. By monitoring the crankshaft and camshaft position sensor signals, the ECM can calculate when a misfire occurs.
For a non-catalyst damaging misfire, the diagnostic will be required to report a misfire present within 1000-3200 engine
revolutions. For catalyst damaging misfire, the diagnostic will respond to monitor 200 engine revolutions. Rough roads may cause
false misfire detection. The rough road(acceleration)sensor consists of a piezoelectric vibration pick up which detects vertical
acceleration of the vehicle. The sensor signal is used by the ECM to determine the degree of vertical movement of the car, for
example, on a bumpy road. Since this may also cause uneven engine running, the ECM uses the signal to distinguish the
phenomenon from actual misfiring.

DTC Description
If the PCM detects that engine speed variation indicates a misfire sufficient to cause three-way catalyst converter damage or
emissions level to exceed standard value, the PCM sets DTC P0303. If the misfire rate is high enough to damage the catalyst, the
MIL will flash to alert the vehicle operator.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 276 of 417

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Calculation of engine roughness

• 156 < Mass air flow(mg/rev.) < 710 (depends on RPM ,

Coolant temp.)
• 512 < Engine speed(RPM) < 6500
• 141 < Throttle gradient(°TPS/sec.) < 199
• Coolant temperature > 20°C (-4°F) if Start temperature < - • Faulty spark plugs, high-tension
Enable Conditions
7°C (19.4°F) lead, or Ignition coil
• No rough road • Incorrect valve timing
• No relevant failure • Uneven compression
• 11V< Battery voltage • Air leakage
• Fuel cut off not active • Improper Fuel pressure or dirty
fuel.
• Misfire = 12~54% within 200 rev.(Catalyst temperature
Threshold Case1 • Blocked/Leaking injectors
>1050°C (1922°F))
Value • Leakage between cooling system
Case2 • Misfire = 1.2% within 1000 rev. and cylinder

Diagnosis Case1 • 200 revolution or 3*200 revolution

Time Case2 • 1000 revolution or 4*1000 revolution

cardiagn.com
Mil On Case1 • Immediate
Condition Case2 • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Primary ignition coil (Ω) Secondary ignition coil(kΩ)
20 68 0.5~0.6 7.5~10.2

Monitor DTC Status

If any DTCs related to injectors, HO2S, ECT(Engine Coolant Temperature)Sensor, Throttle Position sensor or Mass Air Flow
Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting procedure. If
the misfire rate is high enough to cause possible catalyst damage(if the MIL was blinking), ensure that the monitoring for
DTC P0420 is completed and passed after verifying the misfire repair.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 277 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and
ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ If any misfire DTCs related to companion cylinders{P0301(Cylinder1)&P0304(Cylinder4), P0302
(Cylinder2))&P0303(Cylinder3)} are also stored, go to "Ignition System Inspection" procedure.If not, go to
next step as below.

Visual Inspection
1. Visually/physically inspect for the following conditions
- Vacuum hoses in engine room for splits, kinks and improper installation
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
- Verify that the ECM ground connections are clean and properly tightened.
2. Check MAFS and ECTS for the following conditions:
- Contamination, deterioration, poor connection or damaged harness
- The MAF signal displayed on the scantool should increase as engine speed increases
- The engine coolant temperature displayed on the scantool should close to the actual coolant temperature.
3. Was a problem found in any of the above areas?

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Timing Inspection
1. With ignition "OFF", set up an oscilloscope as follows :
Channel A (+): terminal 3 of the Crankshaft Position Sensor(CKPS), (-): ground
Channel B (+): terminal 3 of the Camshaft Position Sensor(CMPS), (-): ground
2. Start the engine and check for signal waveform whether synchronize with camshaft sensor or not.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 278 of 417

cardiagn.com
Fig.1)The CMPS falling(rising) edge is coincided with 3~5 tooth of the CKP from one longer signal(missing tooth)
3. Is the signal waveform normal?

▶ Go to next step as below.

▶ Repair or readjust as necessary, if air gap of the CKPS is exceeds specification [0.3~1.7 mm
(0.012~0.067 in)]. If OK, check that the crankshaft and camshaft are correctly aligned the matching marks
of the pulleys. Repair or readjust as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition System Inspection

1. Spark Plug Cable & Ignition Coil Inspection
(1) Visually/physically inspect the spark plug cable and ignition coil related to the misfiring cylinder(s) for the following
conditions.
- Damage, cracks, carbon and flashover
- Poor connection or damaged harness
- Connected to the incorrect cylinders at the ignition coil and spark plug
(2) Measure the resistance of the spark plug cable related to the misfiring cylinder(s)

Specification : 5.6kΩ/m ±20%

(3) Measure the resistance of the primary and secondary ignition coil related to the misfiring cylinder(s)

Specification : Primary Ignition Coil Resistance : Approx. 0.5~0.6Ω at 20°C(68°F)

Secondary Ignition Coil Resistance : Approx. 7.5~10.2kΩ at 20°C(68°F)

(4) Was a problem found in any of the above areas?

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

2. Spark Plug Inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 279 of 417

(1) Visually/physically inspect the spark plug related to the misfiring cylinder(s) for the following conditions
- Damaged insulation, Worn electrodes, Oil or fuel fouled, Loose terminals and cracks
- Check for electrode gap : 1.0 - 1.1 mm (0.039 - 0.043 in.)
- Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
(2) Was a problem found in any of the above areas?

▶ Replace or adjust as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Fuel System Inspection

1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage
(3) Inspect fuel pressure with normal idle status

Specification : 338~348kPa(3.45~3.55kg/cm²)

(4) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to

cardiagn.com
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Clogged fuel filter Fuel filter
Fuel Pressure too low Fuel leak on the fuel-pressure regulator that is
Fuel Pump(Fuel Pressure Regulator)
assembled on fuel pump
Fuel Pressure too High Sticking fuel pressure regulator Fuel Pump(Fuel Pressure Regulator)

2. Fuel Pressure Hold Inspection

(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes

(2) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Fuel pressure drops slowly Injector leak Injector
Fuel pressure drops
Stuck open in check valve of the fuel pump Fuel pump
immediately

Engine Compression Test

1. Warm up the engine to normal operating temperature. Verify the battery must be at or near full charge.
2. With ignition "OFF", disconnect the ignition coil connectors and the spark plug cables
3. Install compression pressure gauge to the spark plug hole.
4. With wide open throttle by hand, cranking the engine and record the compression readings from all of the cylinders

Specification : Compression pressure : 1,283kPa (13.0kgf/cm², 185psi)

Minimum pressure : 1,135kPa (11.5kgf/cm², 164psi)
Difference between each cylinder : 100kPa (1.0kgf/cm², 15psi) or less

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 280 of 417

5. Is compression pressure within the specified value?

▶ Verify if the engine has excessive coolant consumption. If yes, check for damaged inlet water passage,
engine block, cylinder head or head gasket. Repair or replace as necessary and go to "Verification of
Vehicle Repair" procedure.
▶ If the cylinder compression in 1 or more cylinders is low, pour a small amount of engine oil into the
cylinder through the spark plug hole and repeat compression test for cylinders with low compression
pressure.- If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are
worn or damaged.- If pressure stays low, a valve may be sticking or seating is improper, or there may be
leakage past the gasket. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0304 Cylinder 4-Misfire detected
Component Location

General Description
The Misfire monitor diagnostic is based on crankshaft rotation velocity variation. The ECM determines crankshaft rotational
velocity using the crankshaft position sensor and camshaft position sensor. When a cylinder misfires the crankshaft slows down
momentarily. By monitoring the crankshaft and camshaft position sensor signals, the ECM can calculate when a misfire occurs.
For a non-catalyst damaging misfire, the diagnostic will be required to report a misfire present within 1000-3200 engine
revolutions. For catalyst damaging misfire, the diagnostic will respond to monitor 200 engine revolutions. Rough roads may cause
false misfire detection. The rough road(acceleration)sensor consists of a piezoelectric vibration pick up which detects vertical
acceleration of the vehicle. The sensor signal is used by the ECM to determine the degree of vertical movement of the car, for
example, on a bumpy road. Since this may also cause uneven engine running, the ECM uses the signal to distinguish the
phenomenon from actual misfiring.

DTC Description
If the PCM detects that engine speed variation indicates a misfire sufficient to cause three-way catalyst converter damage or
emissions level to exceed standard value, the PCM sets DTC P0304. If the misfire rate is high enough to damage the catalyst, the
MIL will flash to alert the vehicle operator.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 281 of 417

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Calculation of engine roughness

• 156 < Mass air flow(mg/rev.) < 710 (depends on RPM ,

Coolant temp.)
• 512 < Engine speed(RPM) < 6500
• 141 < Throttle gradient(°TPS/sec.) < 199
• Coolant temperature > 20°C (-4°F) if Start temperature < - • Faulty spark plugs, high-tension
Enable Conditions
7°C (19.4°F) lead, or Ignition coil
• No rough road • Incorrect valve timing
• No relevant failure • Uneven compression
• 11V< Battery voltage • Air leakage
• Fuel cut off not active • Improper Fuel pressure or dirty
fuel.
• Misfire = 12~54% within 200 rev.(Catalyst temperature
Threshold Case1 • Blocked/Leaking injectors
>1050°C (1922°F))
Value • Leakage between cooling system
Case2 • Misfire = 1.2% within 1000 rev. and cylinder

Diagnosis Case1 • 200 revolution or 3*200 revolution

Time Case2 • 1000 revolution or 4*1000 revolution

cardiagn.com
Mil On Case1 • Immediate
Condition Case2 • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) Primary ignition coil (Ω) Secondary ignition coil(kΩ)
20 68 0.5~0.6 7.5~10.2

Monitor DTC Status

If any DTCs related to injectors, HO2S, ECT(Engine Coolant Temperature)Sensor, Throttle Position sensor or Mass Air Flow
Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting procedure. If
the misfire rate is high enough to cause possible catalyst damage(if the MIL was blinking), ensure that the monitoring for
DTC P0420 is completed and passed after verifying the misfire repair.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 282 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and
ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ If any misfire DTCs related to companion cylinders{P0301(Cylinder1)&P0304(Cylinder4), P0302
(Cylinder2))&P0303(Cylinder3)} are also stored, go to "Ignition System Inspection" procedure.If not, go to
next step as below.

Visual Inspection
1. Visually/physically inspect for the following conditions
- Vacuum hoses in engine room for splits, kinks and improper installation
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
- Verify that the ECM ground connections are clean and properly tightened.
2. Check MAFS and ECTS for the following conditions:
- Contamination, deterioration, poor connection or damaged harness
- The MAF signal displayed on the scantool should increase as engine speed increases
- The engine coolant temperature displayed on the scantool should close to the actual coolant temperature.
3. Was a problem found in any of the above areas?

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Timing Inspection
1. With ignition "OFF", set up an oscilloscope as follows :
Channel A (+): terminal 3 of the Crankshaft Position Sensor(CKPS), (-): ground
Channel B (+): terminal 3 of the Camshaft Position Sensor(CMPS), (-): ground
2. Start the engine and check for signal waveform whether synchronize with camshaft sensor or not.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 283 of 417

cardiagn.com
Fig.1)The CMPS falling(rising) edge is coincided with 3~5 tooth of the CKP from one longer signal(missing tooth)
3. Is the signal waveform normal?

▶ Go to next step as below.

▶ Repair or readjust as necessary, if air gap of the CKPS is exceeds specification [0.3~1.7 mm
(0.012~0.067 in)]. If OK, check that the crankshaft and camshaft are correctly aligned the matching marks
of the pulleys. Repair or readjust as necessary and go to "Verification of Vehicle Repair" procedure.

Ignition System Inspection

1. Spark Plug Cable & Ignition Coil Inspection
(1) Visually/physically inspect the spark plug cable and ignition coil related to the misfiring cylinder(s) for the following
conditions.
- Damage, cracks, carbon and flashover
- Poor connection or damaged harness
- Connected to the incorrect cylinders at the ignition coil and spark plug
(2) Measure the resistance of the spark plug cable related to the misfiring cylinder(s)

Specification : 5.6kΩ/m ±20%

(3) Measure the resistance of the primary and secondary ignition coil related to the misfiring cylinder(s)

Specification : Primary Ignition Coil Resistance : Approx. 0.5~0.6Ω at 20°C(68°F)

Secondary Ignition Coil Resistance : Approx. 7.5~10.2kΩ at 20°C(68°F)

(4) Was a problem found in any of the above areas?

▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

2. Spark Plug Inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 284 of 417

(1) Visually/physically inspect the spark plug related to the misfiring cylinder(s) for the following conditions
- Damaged insulation, Worn electrodes, Oil or fuel fouled, Loose terminals and cracks
- Check for electrode gap : 1.0 - 1.1 mm (0.039 - 0.043 in.)
- Check if the spark plug for the relevant cylinder is lighter in color than the other plugs.
(2) Was a problem found in any of the above areas?

▶ Replace or adjust as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Fuel System Inspection

1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage
(3) Inspect fuel pressure with normal idle status

Specification : 338~348kPa(3.45~3.55kg/cm²)

(4) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to

cardiagn.com
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Clogged fuel filter Fuel filter
Fuel Pressure too low Fuel leak on the fuel-pressure regulator that
Fuel Pump(Fuel Pressure Regulator)
is assembled on fuel pump
Fuel Pressure too High Sticking fuel pressure regulator Fuel Pump(Fuel Pressure Regulator)

2. Fuel Pressure Hold Inspection

(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes

(2) Is fuel pressure within the specified value?

▶ Go to next step as below.

▶ Inspect the suspected area. Refer to table as below. Repair or replace as necessary and go to
"Verification of Vehicle Repair" procedure.

Condition Possible Cause Suspected Area

Fuel pressure drops slowly Injector leak Injector
Fuel pressure drops
Stuck open in check valve of the fuel pump Fuel pump
immediately

Engine Compression Test

1. Warm up the engine to normal operating temperature. Verify the battery must be at or near full charge.
2. With ignition "OFF", disconnect the ignition coil connectors and the spark plug cables
3. Install compression pressure gauge to the spark plug hole.
4. With wide open throttle by hand, cranking the engine and record the compression readings from all of the cylinders

Specification : Compression pressure : 1,283kPa (13.0kgf/cm², 185psi)

Minimum pressure : 1,135kPa (11.5kgf/cm², 164psi)
Difference between each cylinder : 100kPa (1.0kgf/cm², 15psi) or less

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 285 of 417

5. Is compression pressure within the specified value?

▶ Verify if the engine has excessive coolant consumption. If yes, check for damaged inlet water passage,
engine block, cylinder head or head gasket. Repair or replace as necessary and go to "Verification of
Vehicle Repair" procedure.
▶ If the cylinder compression in 1 or more cylinders is low, pour a small amount of engine oil into the
cylinder through the spark plug hole and repeat compression test for cylinders with low compression
pressure.- If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are
worn or damaged.- If pressure stays low, a valve may be sticking or seating is improper, or there may be
leakage past the gasket. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0315 Crankshaft Position System Variation Not
Learned
Component Location

General Description
The Crankshaft Position Sensor (CKPS) is a hall effect type sensor that generates voltage using a sensor and a target wheel
mounted on the crankshaft; there are 58 slots in the target wheel where one is longer than the others. When the slot in the wheel
aligns with the sensor, the sensor voltage outputs low. When the metal (tooth) in the wheel aligns with the sensor, the sensor
voltage outputs high. During one crankshaft rotation there are 58 rectangular signals and one longer signal. The PCM calculates
engine RPM by using the sensor’ s signal and controls the injection duration and the ignition timing. Using the signal differences
caused by the longer slot, the PCM identifies which cylinder is at top dead center.

DTC Description
The PCM sets DTC P0315 when the number of crankshaft teeth during one revolution is incorrect or crankshaft signal is missing
while camshaft signal is detected.

DTC Detecting Condition

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 286 of 417

Item Detecting Condition Possible Cause

DTC Strategy • Monitor segment time adaptation

• 2000 < Segment Time adaptation running in Fuel Cut-Off

Enable Conditions within an Engine Speed range(RPM) < 3000
• Improperly installed target wheel
• No relevant failure
• Poor connection or damaged
Threshold Value • Segment Time adaptation on the Limit > 5/1000 harness

Diagnostic Time •-

Mil On Condition •-

Diagnostic Circuit Diagram

Signal Waveform & Data

cardiagn.com

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 287 of 417

cardiagn.com

Fig.1) The square wave signal should be smooth and without any distortion.
Fig.2)The CMPS falling(rising) edge is coincided with 3~5 tooth of the CKP from one longer signal(missing tooth)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 288 of 417

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Set up an oscilloscope as follows :
Channel A (+): terminal 2 of the CKPS(back probe), (-): ground
Channel B (+): terminal 2 of the CMPS(back probe), (-): ground
2. Start the engine and check for signal waveform compared with reference waveform as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 289 of 417

cardiagn.com

Fig.1) The square wave signal should be smooth and without any distortion.
Fig.2) The CMPS falling(rising) edge is coincided with 3rd~5th tooth of the CKP from one longer signal(missing tooth)
3. Is the signal waveform normal?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 290 of 417

▶ Go to next step as below.

▶ Remove CKP and calculate air gap between sensor and flywheel/torque converter. Readjust as
necessary and go to "Verification of Vehicle Repair" procedure.

Air gap [0.3~1.7 mm [0.012~0.067 in] = measure distance from housing to teeth on flywheel/torque
converter (measurement "A") and from mounting surface on sensor to sensor tip (measurement "B")
subtract "B" from "A"
- If fail to synchronize with CMP sensor, check that the crankshaft and camshaft are correctly aligned
the matching marks of the pulleys. Repair or readjust as necessary and go to "Verification of Vehicle
Repair" procedure.
- Check CKPS for contamination, deterioration, or damage. Substitute with a known-good CKPS and
check for proper operation. If the problem is corrected, replace CKPS and then go to "Verification of
Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

cardiagn.com
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0325 Knock Sensor 1 Circuit (Bank 1 or Single Sensor)
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 291 of 417

General Description
The knock sensor is attached to the cylinder block and senses engine knocking. The sensor contains a piezoelectric element that
converts vibration (or noise) into voltage signal and sends this signal to PCM. With input signals from camshaft position and
crankshaft position sensor, PCM can identify which cylinder is knocking. PCM filters vibrations and determines if the vibrations
are knocking signal. The Engine Control Module (PCM) uses this signal to suppress knocking by retarding ignition timing. The
PCM will set a code (Malfunction Indicator Lamp will Not turn on) if during two driving cycles the Knock sensor's output voltage
falls below minimum threshold. This code indicates an unexpected vibration is being read by the Knock sensor or PCM under
normal engine operation.

DTC Description
The PCM monitors the range of the analog input signal from knock sensor to check sensor failure that is short circuit or open
circuit. If the difference between knock signal and noise level is smaller than the threshold during defined time period, the DTC
P0325 is set. In case the noise level is higher than the upper threshold or lower than the lower threshold, the DTC P0325 is set
too.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Plausability check

• Engine speed > 2200 rpm

• Open/short in signal or ground
Enable Conditions • Engine load > 0.4g/rev.(220mg/tdc)

cardiagn.com
circuit
• No relevant failure
• Poor connection or damaged
Threshold Value • Difference between sensor signal and noise level < 0.08V harness
• Faulty knock sensor
Diagnostic Time • 10 sec.

Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 292 of 417

Monitor Scantool Data

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Ground circuit inspection

1. Ignition "OFF"
2. Disconnect Knock sensor and PCM connectors
3. Measure resistance between ground terminal of the sensor harness connector and Knock signal of the PCM harness
connector.

Specification : Approx. 0Ω

4. Is resistance within the specification?

▶ Go to "Signal Circuit Inspection" procedure.

▶ Check for an open in ground circuit. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Signal Circuit Inspection

1. Check for short to ground in signal circuit

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 293 of 417

(1) Measure resistance between signal terminal of the sensor harness connector and chassis ground.

Specification : Infinite

(2) Is resistance within the specification?

▶ Go to next step as below.

▶ Check signal circuit for short to ground. Repair as necessary and go to "Verification of Vehicle
Repair" procedure.

2. Check for short to power in signal circuit

(1) Disconnect PCM connector
(2) Ignition "ON" & Engine "OFF"
(3) Measure voltage between signal terminal of sensor harness connector and chassis ground.

Specification : Approx. 0V

(4) Is voltage within the specification?

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
3. Check for open in signal harness
(1) Ignition "OFF"
(2) Measure resistance between signal terminal of sensor harness connector and Knock signal terminal of the PCM harness
connector.

Specification : Approx. 0Ω

(3) Is resistance within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

Component Inspection
1. Component resistance inspection
(1) Measure resistance between signal terminal and ground terminal of the sensor connector(Component side).

Specification : Approx. 5MΩ at 20°C(68°F)

2. Output signal inspection

(1) Remove knock sensor from vehicle and secure (across mounting boss) in a shop vise.
(2) Set up an oscilloscope as follows :
Channel A (+): Signal terminal, (-): Ground terminal

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 294 of 417

(3) Rap on vise with a ball peen hammer while monitoring oscilloscope screen (there should be a spike of less than 1 volt with
each hammer strike).

Specification : knock sensor send a voltage spike with hammer strikes

3. Installation torque inspection

(1) Check the installation torque of the knock sensor.

Specification : Approx. 16 ~ 28N·m(160~250 kg·cm,11.8~18.4 lb·ft)

4. Has a problem been found?

▶ Check knock sensor for contamination, deterioration, or damage. Substitute with a known-good sensor
and check for proper operation. If the problem is corrected, replace sensor and then go to "Verification of
Vehicle Repair" procedure.
▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

cardiagn.com
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0335 Crankshaft Position Sensor \'A\' Circuit
Component Location

General Description
The Crankshaft Position Sensor (CKPS) is a hall effect type sensor that generates voltage using a sensor and a target wheel
mounted on the crankshaft; there are 58 slots in the target wheel where one is longer than the others. When the slot in the wheel
aligns with the sensor, the sensor voltage outputs low. When the metal (tooth) in the wheel aligns with the sensor, the sensor
voltage outputs high. During one crankshaft rotation there are 58 rectangular signals and one longer signal. The PCM calculates
engine RPM by using the sensor’ s signal and controls the injection duration and the ignition timing. Using the signal differences
caused by the longer slot, the PCM identifies which cylinder is at top dead center.

DTC Description

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 295 of 417

The PCM sets DTC P0335 when the number of crankshaft teeth during one revolution is incorrect or crankshaft signal is missing
while camshaft signal is detected.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Check camshaft signal switching

• 6V< Battery voltage < 16V

Enable Conditions
• Camshaft signal valid
• Open or short in signal, ground or
Case1 • No crankshaft teeth during 4 camshaft signal transition power supply circuit
• Crankshaft teeth detected but synchronization not • Poor connection or damaged
Threshold Case2 harness
successful
Value
• Damage to the connecting
• Number of Crankshaft Teeth within one revolution to high
Case3 flange/flywheel
or too low
• Misadjust crankshaft and
Case1 • 2 revolutions camshaft pulley position
Diagnosis • Faulty CKP sensor
Case2 • 2 revolutions
Time
Case3 • 2.5 revolutions

Mil On Condition • 2 Driving Cycles

cardiagn.com
Diagnostic Circuit Diagram

Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 296 of 417

cardiagn.com

Fig.1) The square wave signal should be smooth and without any distortion.
Fig.2)The CMPS falling(rising) edge is coincided with 3~5 tooth of the CKP from one longer signal(missing tooth)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 297 of 417

Monitor Scantool Data

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Power Circuit Inspection

1. Ignition "OFF"
2. Disconnect CKP sensor connector
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of CKPS harness connector and chassis ground.

Specification : Approx. B+

5. Is voltage within the specification?

▶ Go to "Ground Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the CKPS.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ground circuit inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 298 of 417

1. Ignition "OFF"
2. Measure resistance between ground terminal of CKPS harness connector and chassis ground.

Specification : Approx. 0Ω

3. Is resistance within the specification?

▶ Go to "Signal Circuit Inspection" procedure.

▶ Check for an open or short to battery in the ground circuit.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

1. Check for open or short to ground in signal circuit
(1) Ignition "ON" & Engine "OFF"
(2) Measure voltage between signal terminal of CKPS harness connector and chassis ground.

Specification : Approx. 5V

(3) Is voltage within the specification?

▶ Go to next step as below.

cardiagn.com
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2. Check for short to power in signal circuit

(1) Ignition "OFF"
(2) Disconnect PCM connector
(3) Ignition "ON" & Engine "OFF"
(4) Measure voltage between signal terminal of CKPS harness connector and chassis ground.

Specification : Approx. 0V

(5) Is voltage within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Set up an oscilloscope as follows :
Channel A (+): terminal 2 of the CKPS(back probe), (-): ground
Channel B (+): terminal 2 of the CMPS(back probe), (-): ground
2. Start the engine and check for signal waveform compared with reference waveform as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 299 of 417

cardiagn.com
Fig.1) The square wave signal should be smooth and without any distortion.
Fig.2,3) The CMPS falling(rising) edge is coincided with 3rd~5th tooth of the CKP from one longer signal(missing tooth)
3. Is the signal waveform normal?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Remove CKP and calculate air gap between sensor and flywheel/torque converter. Readjust as
necessary and go to "Verification of Vehicle Repair" procedureNote) Air gap [0.3~1.7 mm [0.012~0.067 in]
= measure distance from housing to teeth on flywheel/torque converter (measurement "A") and from
mounting surface on sensor to sensor tip (measurement "B") subtract "B" from "A"
▶ If air gap is OK, check CKPS for contamination, deterioration, or damage. Substitute with a known-good
CKPS and check for proper operation. If the problem is corrected, replace CKPS and then go to
"Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0340 Camshaft Position Sensor \'A\' Circuit (Bank 1 or
Single Sensor)
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 300 of 417

General Description
The Camshaft Position Sensor (CMPS) is a sensor that detects the compression TDC of the NO. 1 cylinder. The CMPS consists
of a hall type sensor and a target on the end of the intake camshaft. When the target triggers the sensor, the sensor voltage is 5V.
If not, the sensor voltage is 0V. These CMPS signal is sent to the PCM and the PCM uses the CMPS signal for synchronizing the
firing of sequential fuel injectors.

DTC Description
The PCM monitors the camshaft sensor signal transition position which must change only once per crankshaft revolution. If no

cardiagn.com
camshaft signal is detected while crankshaft signal is detected, the PCM sets DTC P0340.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Check camshaft signal switching
• Open or short in signal, ground or
• 6V< Battery voltage < 16V power supply circuit
Enable Conditions
• No crankshaft error • Poor connection or damaged
harness
Threshold Value • No camshaft edge detected
• Misadjust crankshaft and
Diagnostic Time • 40 revolutions camshaft pulley position
• Faulty CMP sensor
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 301 of 417

cardiagn.com
Monitor DTC Status
1. Clear the DTC with GDS.
2. Operate the vehicle within the following conditions:
- Engine run time at idle over 10 minutes
- Engine Oil Temp. is between 20°C(68°F) and 110°C(230°F)
3. Ignition"ON" & Engine"OFF"
4. Using a GDS, monitor DTC
5. Go to applicable troubleshooting procedure for the following conditions
- If any DTCs related to OCV(P0011) are stored, do ALL REPAIRS associated with those codes before proceeding with this
troubleshooting procedure.
- If DTC P0340 is set again, go to next step as below.
- If other DTCs are stored, go to the applicable troubleshooting procedure.
- If no DTC output, go to "Verification of Vehicle Repair" procedure.
6. Click "DTC Status" on the menu bar to see DTC's information.
7. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
8. Read "DTC Status" parameter
9. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 302 of 417

Power Circuit Inspection

1. Ignition "OFF"
2. Disconnect CMP sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of CMPS harness connector and chassis ground.

Specification : Approx. B+

5. Is voltage within the specification?

▶ Go to "Ground Circuit Inspection" procedure.

▶ Check for a open in the power supply circuit between the main relay and the CMPS.
▶ Especially check for open or blown 10A sensor fuse.
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ground circuit inspection

1. Ignition "OFF"
2. Measure resistance between ground terminal of CMPS harness connector and chassis ground.

cardiagn.com
Specification : Approx. 0Ω

3. Is resistance within the specification?

▶ Go to "Signal Circuit Inspection" procedure.

▶ Check for an open or short to battery in the ground circuit.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

1. Check for short to ground in signal harness
(1) Measure resistance between signal terminal of CMPS harness connector and chassis ground.

Specification : Infinite

(2) Is resistance within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2. Check for short to battery in signal harness

(1) Disconnect PCM connector
(2) Ignition "ON" & Engine "OFF"
(3) Measure voltage between signal terminal of CMPS harness connector and chassis ground.

Specification : Approx. 0V

(4) Is voltage within the specification?

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

3. Check for open in signal harness

(1) Ignition "OFF"
(2) Measure resistance between signal terminal of CMPS harness connector and CMPS signal terminal of the PCM

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 303 of 417

connector.

Specification : Approx. 0Ω

(3) Is resistance within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below

cardiagn.com
Component Inspection
1. Set up an oscilloscope as follows :
Channel A (+): terminal 2 of the CKPS(back probe), (-): ground
Channel B (+): terminal 2 of the CMPS(back probe), (-): ground
2. Start the engine and check for signal waveform compared with reference waveform as below.

Fig.1) The square wave signal should be smooth and without any distortion.
Fig.2,3) The CMPS falling(rising) edge is coincided with 3rd~5th tooth of the CKP from one longer signal(missing tooth)
3. Is the signal waveform normal?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 304 of 417

procedure.
▶ Remove CKP and calculate air gap between sensor and flywheel/torque converter. Readjust as
necessary and go to "Verification of Vehicle Repair" procedureNote) Air gap [0.3~1.7 mm [0.012~0.067 in]
= measure distance from housing to teeth on flywheel/torque converter (measurement "A") and from
mounting surface on sensor to sensor tip (measurement "B") subtract "B" from "A"
▶ If air gap is OK, check CKPS for contamination, deterioration, or damage. Substitute with a known-good
CKPS and check for proper operation. If the problem is corrected, replace CKPS and then go to
"Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0420 Catalyst System Efficiency below Threshold
(Bank 1)
Component Location

General Description
The PCM uses dual oxygen sensors to monitor the efficiency of the manifold catalytic converter (warm-up catalytic converter). By
monitoring the oxygen storage capacity of a catalyst, its efficiency can be indirectly calculated. The upstream (front) HO2S is
used to detect the amount of oxygen in the exhaust gas before it enters the catalytic converter. A low voltage indicates high
oxygen contents (lean air mixture). A high voltage indicates low oxygen contents (rich air mixture). When the catalyst efficiency
drops, no chemical reaction takes place. This means the concentration of oxygen will be the same at the rear as it is at the front.
The output voltage of the rear HO2S copies the voltage of the front HO2S.To monitor the system, the lean-to-rich switches of the
front HO2S to the rear HO2S is counted. The ratio of rear switches to front switches is used to determine whether the catalyst is
operating properly. An effective catalyst will have fewer rear switches than front switches, that is, a ratio closer to zero.

DTC Description
The PCM calculates oscillation size of rear HO2S signal which represents catalyst conversion properties. This oscillation size will
determine if catalyst conversion is low due to aging or poisoning from leaded fuel or misfiring. The PCM sets P0420 if the average
of calculated oscillation size of rear HO2S signal during predetermined duration is higher than the predetermined threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 305 of 417

• Check catalyst oxygen storage capacity by evaluation

DTC Strategy
downstream HO2S sensor fluctuations

• Coolant temperature >74°C(165°F)

• 4.8Km/h(3MPH) < Vehicle speed > 179.2Km/h(112MPH)
• Engine speed < 3400rpm
• 200 < Engine Load(mg/rev) > 700
• 400°C(752°F) ≤ Catalyst temp. model ≤ 900°C(1652°F) • Exhaust gas leaks
Enable Conditions
• Lambda regulation active • Faulty rear HO2S
• Canister Purge Valve not on CLOSE state • Faulty three way catalyst
• Catalyst purge after Fuel Cut-off finished converter
• No relevant failure
• 11V < Battery voltage < 16V

Threshold Value • Average malfunction index > 1.75

Diagnostic Time • 100 Lambda Controller Cycles

Mil On Condition • 2 Driving Cycles

Signal Waveform & Data

GDS Display for HO2S

cardiagn.com
GDS Parameter
Test Condition
HO2S SNSR VOL.-B1/S1 HO2S SNSR VOL.-B1/S2
Signal is switching from rich
Normal Value when (above 0.45V) to lean(below
Idle after warm up above 0.7V
circuit is normal 0.45V) a minimum of 3 times
in 10 seconds.
HO2S(B1S1) signal circuit open Approx. 0.43~0.45V -
HO2S(B1S2) signal circuit open - Approx. 0.43~0.45V

If any codes relating to injectors, HO2S, ECT(Engine Coolant Temperature)Sensor, Throttle Position sensor or Mass Air
Flow Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting tree.

Monitor Scantool Data

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 306 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Exhaust system Inspection

1. Visually/physically inspect the following conditions:
'- Exhaust system between HO2S and Three way catalyst for air leakage, restriction and damage.
'- Damage, and for loose or missing hardware:
2. Was a problem found in any of the above areas?

▶ 'Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to "Rear HO2S Inspection " procedure.

Rear HO2S Inspection

1. Visually/physically inspect the rear HO2S for the following conditions:
'- Ensure that the HO2S is securely installed.(Pigtail and wiring harness not making contact with the exhaust pipe)
'- Check for corrosion on terminals
'- Check for terminal tension ( at the HO2S and at the PCM)
'- Any road damage
2. Was a problem found in any of the above areas?

▶ 'Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to "TWC Inspection " procedure.

TWC Inspection
1. Visually/physically inspect the three-way catalyst(TWC) converter for the following damage:

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 307 of 417

'- Severe discoloration caused by excessive temperature

'- Dents and holes
'- Internal rattle caused by a damaged catalyst
2. 2) Also, ensure that the TWC is a proper original equipment manufacturer part.
3. Was a problem found?

▶ 'Replace TWC and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

cardiagn.com
▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0441 Evaporative Emission System Incorrect Purge
Flow
Component Location

General Description
The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the
atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The PCM
controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for
combustlon. This valve is actuated by the purge control signal from the PCM and controls fuel vapor from the canister to the
intake manifold.

DTC Description
During "test of vapour generation" a new value from the tank pressure sensor is measured and compared with the start pressure
at beginning of "test of vapour generation".The PCM sets DTC P0441 if the pressure signal decrease occurs and the difference is
below the predetermined threshold.
If same error code is set in the next driving cycle, the PCM illuminates the MIL.

DTC Detecting Condition

Item Detecting Condition Possible Cause

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 308 of 417

DTC Strategy • Monitoring Fuel Tank Pressure during Vapor Generation

check

• 4°C(39.2°F) < Start Coolant temp. < 35°C(95°F)

• Ambient air temperature model >-10°C(14°F)
• Vehicle speed< 10km/h(6mph)
• Time after start >590 sec.
• Limited Canister saturation
Enable Conditions • Estimated altitude< 2.4km(8000ft)
• Leakage on hose to PCSV
• Idle speed engine operating state
• Faulty PCSV
• Minimum canister purge time: 5~25sec.(depending on
canister load)
• Differential fuel tank Pressure : -11~4 hpa
• 11V < Battery voltage < 16V

Threshold Value • Differential fuel tank Pressure < -2 hpa

Diagnostic Time • 0,5 sec.
Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

cardiagn.com

Monitor DTC Status

1. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

2. Install GDS and clear DTC

3. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 309 of 417

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status
2. No relevant DTC
3. Fuel level is below 80%

4. Is DTC P0441 set again?

▶ Go to next step as below

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification
of Vehicle Repair" procedure

Component Inspection
■ PCSV Inspection
1. Ignition "OFF"
2. Disconnect the hose leading from the PCSV to intake manifold at intake manifold.

cardiagn.com
3. Using a vacuum pump, apply vacuum to the manifold side of the vacuum hose and verify PCSV holds vacuum.
4. Ignition "ON" & Engine "OFF"
5. Install GDS and select "EVAP PURGE VALVE" on the Actuation Test mode
6. Activates "EVAP PURGE VALVE" by pressing "STRT(F1)" key
7. Verify PCSV release vacuum while valve is activating(should hear a faint click from PCSV)
8. Repeat this procedure 4 or 5 times to ensure PCSV reliability.
Specification:

Test Condition Specification

PCSV is ON(should hear a faint click from PCSV) Holds vacuum
PCSV is OFF Release vacuum

9. Is PCSV working properly?

▶ Go to next step as below

▶ Verify arrow on PCSV is pointing towards intake manifold. If it is not, reverse installation. Reinstall as
necessary and go to "Verification of Vehicle Repair" procedure.
If OK, thoroughly check fuel vapor hoses and hose clamps between PCSV and intake manifold. Repair as
necessary. If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace
PCSV and go to "Verification of Vehicle Repair" procedure

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure

Verification of Vehicle Repair

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 310 of 417

1. Return vehicle to original condition

2. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

3. Install GDS and clear DTC

4. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status
2. No relevant DTC
3. Fuel level is below 80%

5. Monitoring for (pending) DTC.Is the same DTC set?

▶ Go to the applicable troubleshooting procedure.

▶ System performing to specification at this time.

cardiagn.com
Fuel System > Engine Control System > P0442 Evaporative Emission System-Leak detected
(small leak)
General Description
Due to the increasing ambient temperature of the fuel and the return of unused hot fuel from the engine, fuel vapors are
generated in the tank. In order to control the release of these vapors to the atmosphere, the evaporative emissions control system
is used. The evaporative emission control system reduces hydrocarbon (HC) emissions by trapping fuel tank vapors until they can
be burned in the combustion process. Evaporating fuel is stored in a charcoal canister until it can be flushed into the intake
manifold. The evaporative emission control system is made up of a fuel tank that can be completely sealed from outside air, a
Fuel Tank Pressure Sensor (FTPS), a Canister Close Valve (CCV) that seals the canister from the outside air, a canister filled
with activated charcoal granules, a Purge Control Solenoid Valve (PCSV). The evaporative emission system can be checked for
leaks by sealing the system off from the outside air, creating a vacuum, and monitoring if the system can hold that vacuum
sufficiently for a set amount of time. If it cannot, a leak exists somewhere in the system.

DTC Description
The PCM closes the Canister Close Valve (CCV) at the charcoal canister to seal off the evaporative emission system and then
opens purge control valve (PCSV) to generate a vacuum in the fuel tank. After vacuum generation, the PCM measures pressure
differential curve in the fuel tank and sets DTC P0442 or P0456 if the vacuum generated within a monitoring period increases
above a defined threshold.
If same error code is set in the next driving cycle, the PCM illuminates the MIL.

DTC Detecting Condition

Item Detecting Condition Possible Cause
• Monitoring Fuel Tank Pressure Trend after generating
DTC Strategy
underpressure in Tank

• 4°C(39.2°F) < Start Coolant temp. < 35°C(95°F) • Fuel filler cap damage or missing
• Ambient air temperature model >-10°C(14°F) • Faulty or damaged fuel filler pipe
• Vehicle speed< 10km/h(6mph) • Leaking, disconnected or plugged
fuel vapor lines
• Time after start >590 sec.
• CANISTER CLOSE VALVE
• Limited Canister saturation
Enable Conditions • PCSV
• Estimated altitude< 2.4km(8000ft)
• Canister
• Idle speed engine operating state
• Faulty Fuel Tank Pressure
• Minimum canister purge time: 5~25sec.(depending on
Sensor (FTPS)
canister load)
• Fuel in lines due to faulty Rollover
• Differential fuel tank Pressure : -11~4 hpa
Valve

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 311 of 417

• 11V < Battery voltage < 16V • On-Board Refueling Vapor

Recovery Valve (ORVR valve) or
Threshold Value • Leak diameter > 0.73mm
stuck closed CCV
Diagnostic Time • 30 sec. In idle when all enable conditions fulfilled

Mil On Condition • 2 Driving Cycles

Monitor DTC Status

1. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

2. Install GDS and clear DTC

3. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status

cardiagn.com
2. No relevant DTC
3. Fuel level is below 80%

4. Is DTC P0441 set again?

▶ Go to next step as below.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification
of Vehicle Repair" procedure.

Component Inspection
■ PCSV to Intake manifold Line Inspection
1. Ignition "OFF"
2. Disconnect the hose leading from the PCSV to the intake manifold at PCSV
3. Using a vacuum pump, apply specified vacuum[Approx. 25cmHg(10 inHg)] to the manifold side of the valve and verify PCSV
holds vacuum.
4. Ignition "ON" & Engine "OFF"
5. Install GDS and select "EVAP PURGE VALVE" on the Actuation Test mode
6. Activates "EVAP PURGE VALVE" by pressing "STRT(F1)" key
7. Verify PCSV release vacuum while valve is activating(should hear a faint click from PCSV)
8. Repeat this procedure 4 or 5 times to ensure PCSV reliability.
Specification:

Test Condition Specification

PCSV is ON(should hear a faint click from PCSV) Holds vacuum
PCSV is OFF Release vacuum

9. Is PCSV working properly?

▶ Go to next step as below.

▶ Verify arrow on PCSV is pointing towards intake manifold. If it is not, reverse installation. Reinstall as
necessary and go to "Verification of Vehicle Repair" procedure.
If OK, thoroughly check fuel vapor hoses and hose clamps between PCSV and intake manifold. Repair as

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 312 of 417

necessary. If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace
PCSV and go to "Verification of Vehicle Repair" procedure.

■ Canister Closing Valve(CCV) Line Inspection

1. Reconnect all EVAP hardware that was previously disconnected
2. Disconnect hose connecting Canister Closing Valve(CCV) to canister
3. Ignition "ON" & Engine "OFF"
4. Blow air to the canister side of the valve and verify air escapes to the air filter side.
5. Install GDS and select "CANISTER CLOSE VALVE" on the Actuation Test mode
6. Activates "CANISTER CLOSE VALVE" by pressing "STRT(F1)" key
7. Blow air into hose and verify air does not escape.
8. Repeat this procedure 4 or 5 times to ensure CCV reliability.
9. Is CCV working properly?

▶ Go to next step as below.

▶ Check for cracks or damage in hose connecting CCV and canister. Repair or replace as necessary and
go to "Verification of Vehicle Repair" procedure.
If OK, replace CCV. If CCV was stuck closed, inspect all lines and canister for liquid fuel. Replace any
contaminated components and blow out lines and go to "Verification of Vehicle Repair" procedure.

cardiagn.com
■ Fuel Tank Pressure Sensor Inspection
1. Ignition "ON" & Engine "OFF" .
2. Measure FTPS output voltage between Signal terminal (back probe) of the FTPS harness connector and chassis ground

Specification : Voltage increases proportionally with decreasing pressure(Approx. 2.5V to 4.5V)

Pressure(kPa) Voltage(V)
-3.75 4.5
0 1.5
1.25 0.5

3. Is voltage within the specification?

▶ Go to next step as below.

▶ Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as
necessary.
Check for open or short in FTPS harness. Repair as necessary.If OK, test with a new FTPS and check for
proper operation. If problem is corrected, replace FTPS and go to "Verification of Vehicle Repair"
procedure.

■ PCSV to Canister Line Inspection

1. Check for leakage in hose
(1) Reconnect all EVAP hardware that was previously disconnected
(2) Disconnect the hose leading from the canister to the PCSV at canister
(3) Using a vacuum pump, apply specified vacuum[Approx. 4 inHg(14 kPa)] to the manifold side of the valve for 1 minute and
verify PCSV holds vacuum.
(4) Is pressure within specification?

▶ Go to next step as below.

▶ Check for cracks or damage in hose connecting PCSV and canister. Repair or replace as necessary
and go to "Verification of Vehicle Repair" procedure.

2. Check for leakage in canister

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 313 of 417

(1) Disconnect hose clamps and remove canister assembly

(2) Block the hose of between:
●Canister and fuel filler neck
●Canister and CCV
●Canister and PCSV
(3) Apply maximum of 4 inHg(14 kPa) pressure through fuel tank port from canister
(4) With system sealed and pressurized, check for leaks
(5) Were any leak(s) found?

▶ Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

■ Fuel Tank Line Inspection

1. Relieve the fuel system pressure and remove the fuel tank (caution)
Before removing the fuel tank, make sure the fuel hoses are not leaking.
2. Block all of the following outlets:
(1) Fuel lines
(2) Fuel filler neck
3. Apply maximum of 10cmHg(4 inHg) pressure to the EVAP. hose at the fuel tank. Then, pinch the EVAP. hose to retain the
pressure

cardiagn.com
4. Check the suspect area for leaks with a soap solution.
5. Were any leak(s) found?

▶ Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

1. Return vehicle to original condition
2. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

3. Install GDS and clear DTC

4. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status
2. No relevant DTC
3. Fuel level is below 80%

5. Monitoring for (pending) DTC.Is the same DTC set?

▶ Go to the applicable troubleshooting procedure.

▶ System performing to GDSspecification at this time.

Fuel System > Engine Control System > P0444 Evaporative Emission System-Purge Control
Valve Circuit Open

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 314 of 417

Component Location

General Description
The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the
atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The PCM
controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for
combustion. This valve is actuated by the purge control signal from the PCM and controls fuel vapor flow from the canister to the
intake manifold.

cardiagn.com
DTC Description
PCM sets DTC P0444 if the PCM detects that the PCSV control circuit is open.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

• 10 < Battery voltage(V) < 16

Enable Conditions • Open in PCSV harness
• 2％< Canister purge duty > 98％
• Poor connection or damaged
Threshold Value • Line break harness
• Faulty PCSV
Diagnostic Time • 3 sec.

Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) PCSV Resistance(Ω)
20 68 Approx. 16

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 315 of 417

cardiagn.com
Signal Waveform & Data

Fig 1) Normal waveform with idle

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 316 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect PCSV connector
3. Measure resistance between power terminal and signal terminal of PCSV connector(Component side).

Temp.(°C) Temp.(°F) PCSV Resistance(Ω)

20 68 Approx. 16

4. Is resistance within the specification?

▶ Go to next step as below

▶ Check PCSV for contamination, deterioration, or damage. Substitute with a known-good PCSV and
check for proper operation. If the problem is corrected, replace PCSV and then go to "Verification of
Vehicle Repair" procedure

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of PCSV harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 317 of 417

▶ Go to "Control Circuit Inspection" procedure

▶ Check for a open in the power supply circuit. Repair as necessary and go to "Verification of Vehicle
Repair" procedure

Control Circuit Inspection

1. Measure voltage between Control terminal of the PCSV harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below

▶ Check control circuit for open or short. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

cardiagn.com
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0445 Evaporative Emission System-Purge Control
Valve Circuit Shorted
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 318 of 417

General Description
The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the
atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The PCM
controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for
combustion. This valve is actuated by the purge control signal from the PCM and controls fuel vapor flow from the canister to the
intake manifold.

DTC Description

cardiagn.com
PCM sets DTC P0445 if the PCM detects that the PCSV control circuit is shorted to ground or shorted to battery voltage.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

• 10 < Battery voltage(V) < 16

Enable Conditions • Short in PCSV harness
• 2％< Canister purge duty > 98％
• Poor connection or damaged
Threshold Value • Short to ground or Short to Battery harness
• Faulty PCSV
Diagnostic Time • 3 sec.

Mil On Condition • 2 Driving Cycles

Specification
Temp.(°C) Temp.(°F) PCSV Resistance(Ω)
20 68 Approx. 16

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 319 of 417

cardiagn.com
Signal Waveform & Data

Fig 1) Normal waveform with idle

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 320 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect PCSV connector
3. Measure resistance between power terminal and signal terminal of PCSV connector(Component side).

Temp.(°C) Temp.(°F) PCSV Resistance(Ω)

20 68 Approx. 16

4. Is resistance within the specification?

▶ Go to next step as below

▶ Check PCSV for contamination, deterioration, or damage. Substitute with a known-good PCSV and
check for proper operation. If the problem is corrected, replace PCSV and then go to "Verification of
Vehicle Repair" procedure

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of PCSV harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 321 of 417

▶ Go to next step as below

▶ Check for a open in the power supply circuit. Repair as necessary and go to "Verification of Vehicle
Repair" procedure

Control Circuit Inspection

1. Measure voltage between control terminal of PCSV harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below

▶ Check control circuit for open or short. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

cardiagn.com
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0447 Evaporative Emission System-Vent Control
Circuit Open
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 322 of 417

General Description
The evaporative emissions system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere
where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Canister Closing Valve
(CCV) closes off the air inlet into the canister for leak detection of the evaporative emission system. The CCV also prevents fuel
vapors from escaping from the canister. When the engine purges the HC vapors from the canister, the clean air comes into the
canister through the canister air-filter and the CCV.

DTC Description

cardiagn.com
PCM sets DTC P0447 if the PCM detects that the CCV control line is open.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

Enable Conditions • 10V < Battery voltage < 16V • Open in CCV harness
• Poor connection or damaged
Threshold Value • Line Break
harness
Diagnostic Time • 3 sec. • Faulty CCV
Mil On Condition • 2 Driving Cycles

Specification
Canister Close Valve Normal Parameter At 20°C (68°F)
Resistance 23 ~ 26Ω

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 323 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 324 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect CCV connector
3. Measure resistance between Power terminal and Control terminal of the CCV connector(Component side)

Specification : Approx. 23~26Ω at 20°C(68°F)

4. Is resistance within the specification?

▶ Go to next step as below

▶ Check CCV for contamination, deterioration, or damage. Substitute with a known-good CCV and check

cardiagn.com
for proper operation. If the problem is corrected, replace CCV and then go to "Verification of Vehicle
Repair" procedure

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of the CCV harness connector and chassis ground

Specification : Approx. 12V

3. Is voltage within the specification?

▶ Go to next step as below.

▶ Check for an open in the power supply circuit. Repair as necessary and go to "Verification of Vehicle
Repair" procedure.

Control Circuit Inspection

1. Measure voltage between control terminal of the CCV harness connector and chassis ground.

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 325 of 417

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0448 Evaporative Emission System - Vent Control
Circuit Shorted

cardiagn.com
Component Location

General Description
The evaporative emissions system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere
where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Canister Closing Valve
(CCV) closes off the air inlet into the canister for leak detection of the evaporative emission system. The CCV also prevents fuel
vapors from escaping from the canister. When the engine purges the HC vapors from the canister, the clean air comes into the
canister through the canister air-filter and the CCV.

DTC Description
PCM sets DTC P0448 if the PCM detects that the CCV control line is short to ground or short to battery line.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

Enable Conditions • 10V < Battery voltage < 16V • Short circuit in CCV harness
• Poor connection or damaged
Threshold Value • Short circuit to ground or battery
harness
Diagnostic Time • 3 sec. • Faulty CCV
Mil On Condition • 2 Driving Cycles

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 326 of 417

Specification
Canister Close Valve Normal Parameter At 20°C (68°F)
Resistance 23 ~ 26Ω

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 327 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect CCV connector
3. Measure resistance between Power terminal and Control terminal of the CCV connector(Component side)

Specification : Approx. 23~26Ω at 20°C(68°F)

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Check CCV for contamination, deterioration, or damage. Substitute with a known-good CCV and check
for proper operation. If the problem is corrected, replace CCV and then go to "Verification of Vehicle
Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of the CCV harness connector and chassis ground.

Specification : Approx. 12V

3. Is voltage within the specification?

▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 328 of 417

▶ Check for an open in the power supply circuit. Repair as necessary and go to "Verification of Vehicle
Repair" procedure.

Control Circuit Inspection

1. Measure voltage between control terminal of the CCV harness connector and chassis ground

Specification : Approx. 4~5V

2. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

cardiagn.com
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0449 Evaporative Emission System-Vent Valve /
Solenoid Circuit
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 329 of 417

General Description
The evaporative emissions system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere
where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Canister Closing Valve
(CCV) closes off the air inlet into the canister for leak detection of the evaporative emission system. The CCV also prevents fuel
vapors from escaping from the canister. When the engine purges the HC vapors from the canister, the clean air comes into the
canister through the canister air-filter and the CCV.

DTC Description
The PCM measures pressure in the fuel tank by means of tank pressure sensor during all engine operating states except engine
stop and start. PCM sets DTC P0449 if the PCM detects that the fuel tank pressure is too low as a result of the stuck closed CCV.
And the same error code is set in the next driving cycle, the PCM illuminates the MIL.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Ventilation control valve stuck closed

• Leak detection test not active

Enable Conditions • No tank pressure sensor error
• 11V < Battery voltage < 16V
• Canister air filter contamination
• Fuel Tank underpressure(below -30 hPa) too high • Faulty CCV
Threshold Value

cardiagn.com
• Differential fuel tank pressure V_DTP<1.6V
Diagnostic Time • 10 sec.

Mil On Condition • 2 Driving Cycles

Specification
Canister Close Valve Normal Parameter At 20°C (68°F)
Resistance 23 ~ 26Ω

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 330 of 417

cardiagn.com
Monitor DTC Status

If DTCs (or pending codes) relating to CCV are present, do ALL REPAIRS associated with those codes before proceeding
with this troubleshooting tree.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 331 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
■ Canister Air-Filter inspection
1. Disassemble the Canister Air-Filter and hose from their respective positions.
2. Check the Canister air-filter for contamination.
3. Is Canister Air-Filter contaminated with dust?

▶ Replace as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to "Canister Closing Valve(CCV) inspection" procedure

■ Canister Closing Valve(CCV) inspection

1. Reconnect all EVAP hardware that was previously disconnected
2. Disconnect hose connecting Canister Closing Valve(CCV) to canister
3. Ignition "ON" & Engine "OFF"
4. Blow air to the canister side of the valve and verify air escapes to the air filter side.
5. Install GDS and select "CANISTER CLOSE VALVE" on the Actuation Test mode
6. Activates "CANISTER CLOSE VALVE" by pressing "STRT(F1)" key
7. Blow air into hose and verify air does not escape.
8. Repeat this procedure 4 or 5 times to ensure CCV reliability.
9. Is CCV working properly?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 332 of 417

If hose was pinched or restricted:

1) Fueling would be difficult if not impossible.
2) Restriction or blockage could cause pressure to accumulate in tank triggering a P0451.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ If CCV was stuck closed, inspect all lines and canister for liquid fuel. Replace any contaminated
components and blow out lines. Check CCV for contamination, deterioration, or damage. Substitute
with a known-good CCV and check for proper operation. If the problem is corrected, replace CCV and
then go to "Verification of Vehicle Repair" procedure.

Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure

cardiagn.com
▶ Check for open or short in power supply circuit.
Measure voltage between terminal 5 of the CCV harness connector and chassis ground(Approx. 5V)
Check for open or short in control circuit.
Measure voltage between terminal 6 of the CCV harness connector and chassis ground(Approx. 4~5V)
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0451 Evaporative Emission System-Pressure Sensor
Range / Performance
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 333 of 417

General Description
The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere
where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure
Sensor (FTPS) is an integral part of the evaporative monitoring system. The PCM monitors the FTPS signal to detect vacuum
decay and excess vacuum. The FTPS measures the difference between the air pressure inside the fuel tank and outside air
pressure to check the purge control solenoid valve operation and for leak detection in the evaporative emission control system by
monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid valve operating cycles.

DTC Description
The PCM monitors pressure in the fuel tank by means of Fuel Tank Pressure Sensor (FTPS) during purge control valve opening
or closing phase. This monitoring will determine if pressure sensor signal is stuck. The PCM sets DTC P0451 if pressure variation
is smaller than the predetermined threshold.
If same error code is set in the next driving cycle, the PCM illuminates the MIL.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Plausability Check,Signal Stuck

• Vehicle speed > 45km/h(28mph)

• Canister purge flow variation >0.28g/sec. during 13 sec.
• Minimum tank pressure signal voltage > 0,32 V

cardiagn.com
Enable Conditions
• Modeled ambient air temperature >-10°C(14°F) • Poor connection or damaged
• No relevant failure harness
• 11 < Battery Voltage <16V • Faulty FTPS

Threshold Value • Tank pressure signal variation < 15 mV

Diagnostic Time • 65Sec.

Mil On Condition • 2 Driving Cycles

Specification
Pressure -3.75 kPa(-1.10 inHg) 0 kPa(0 inHg) 1.25 kPa(0.37 inHg)
FTPS output voltage 4.5 V 1.5 V 0.5 V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 334 of 417

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status

If DTCs (or pending codes) relating to FTPS are present, do ALL REPAIRS associated with those codes before proceeding
with this troubleshooting tree.

1. Start engine to normal operating temperature.

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

2. Install GDS and clear DTC.

3. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below.

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1) Engine warm up at Idle Status
2) No relevant DTC
3) Fuel level is below 80%

4. Is DTC P0451 set again?

▶ Go to next step as below.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification
of Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 335 of 417

Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage..
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to "Fuel Tank Pressure Sensor(FTPS) inspection" procedure

Component Inspection
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between signal terminal of the sensor harness connector and chassis ground(Do not disconnect FTPS
harness connector)

Specification : Voltage increases proportionally with decreasing pressure(Approx. 2.5V to 4.5V)

Pressure(kPa(hPa)) Voltage(V)
-3.75(-37.5) 4.5

cardiagn.com
0 1.5
1.25(12.5) 0.5

3. Is voltage within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure
▶ Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as
necessary.
▶ Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go
to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

1. Reconnect all EVAP hardware that was previously disconnected
2. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

3. Install GDS and clear DTC

4. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status
2. No relevant DTC
3. Fuel level is below 80%

5. Monitoring for (pending) DTC.Is the same DTC set?

▶ Go to the applicable troubleshooting procedure.

▶ System performing to specification at this time.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 336 of 417

Fuel System > Engine Control System > P0452 Evaporative Emission System-Pressure Sensor
Low Input
Component Location

General Description
The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere

cardiagn.com
where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure
Sensor (FTPS) is an integral part of the evaporative monitoring system. The PCM monitors the FTPS signal to detect vacuum
decay and excess vacuum. The FTPS measures the difference between the air pressure inside the fuel tank and outside air
pressure to check the purge control solenoid valve operation and for leak detection in the evaporative emission control system by
monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid valve operating cycles.

DTC Description
PCM sets DTC P0452 if the PCM detects signal voltage lower than the possible range of a properly operating FTPS.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

Enable Conditions • 11V< Battery voltage <16V • Short to ground in FTPS harness
• Poor connection or damaged
Threshold Value • Tank pressure signal < 0.32V
harness
Diagnostic Time • 0.5 sec. • Faulty FTPS
Mil On Condition • 2 Driving Cycles

Specification
Pressure -3.75 kPa(-1.10 inHg) 0 kPa(0 inHg) 1.25 kPa(0.37 inHg)
FTPS output voltage 4.5 V 1.5 V 0.5 V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 337 of 417

cardiagn.com
Diagnostic Circuit Diagram

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 338 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Power Circuit Inspection

1. Ignition "OFF"
2. Disconnect FTPS connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of the FTPS harness connector and chassis ground.

Specification : Approx. 5V

5. Is voltage within the specification?

▶ Go to next step as below.

▶ Check for a open/short in the power supply circuit. Repair as necessary and go to "Verification of
Vehicle Repair" procedure.

Signal Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between signal terminal of the FTPS harness connector and chassis ground.

Specification : Approx. 5V

3. Is voltage within the specification?

▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 339 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between signal terminal of the sensor harness connector and chassis ground(Do not disconnect FTPS
harness connector)

Specification : Voltage increases proportionally with decreasing pressure(Approx. 2.5V to 4.5V)

cardiagn.com
Pressure(kPa(hPa)) Voltage(V)
-3.75(-37.5) 4.5
0 1.5
1.25(12.5) 0.5

3. Is voltage within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as
necessary.
▶ Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go
to "Verification of Vehicle Repair" procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0453 Evaporative Emission System-Pressure Sensor
High Input
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 340 of 417

General Description
The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere
where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure
Sensor (FTPS) is an integral part of the evaporative monitoring system. The PCM monitors the FTPS signal to detect vacuum
decay and excess vacuum. The FTPS measures the difference between the air pressure inside the fuel tank and outside air
pressure to check the purge control solenoid valve operation and for leak detection in the evaporative emission control system by
monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid valve operating cycles.

DTC Description

cardiagn.com
PCM sets DTC P0453 if the PCM detects signal voltage higher than the possible range of a properly operating FTPS.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check
• Short to battery in FTPS harness
Enable Conditions • 11V< Battery voltage <16V
• Open in FTPS harness
Threshold Value • Tank pressure signal >4.78V • Poor connection or damaged
harness
Diagnostic Time • 0.5 sec.
• Faulty FTPS
Mil On Condition • 2 Driving Cycles

Specification
Pressure -3.75 kPa(-1.10 inHg) 0 kPa(0 inHg) 1.25 kPa(0.37 inHg)
FTPS output voltage 4.5 V 1.5 V 0.5 V

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 341 of 417

cardiagn.com
Diagnostic Circuit Diagram

Monitor Scantool Data

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 342 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Ground Circuit Inspection

1. Ignition "OFF"
2. Disconnect FTPS connector
3. Measure resistance between ground terminal of the FTPS harness connector and chassis ground

Specification : Approx. 0Ω

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Check for a open or short to battery in ground circuit. Repair as necessary and go to "Verification of
Vehicle Repair" procedure.

Signal Circuit Inspection

1. Check for open in signal circuit
(1) Ignition "ON" & Engine "OFF"
(2) Measure voltage between signal terminal of the FTPS harness connector and chassis ground.

Specification : Approx. 5V

(3) Is voltage within the specification?

▶ Go to next step as below.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 343 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2. Check for short to battery in signal circuit

(1) Ignition "OFF"
(2) Disconnect PCM connector
(3) Ignition "ON" & Engine "OFF"
(4) Measure voltage between signal terminal of the FTPS harness connector and chassis ground.

Specification : Approx. 0V

(5) Is voltage within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

cardiagn.com
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between signal terminal of the sensor harness connector and chassis ground(Do not disconnect FTPS
harness connector)

Specification : Voltage increases proportionally with decreasing pressure(Approx. 2.5V to 4.5V)

Pressure(kPa(hPa)) Voltage(V)
-3.75(-37.5) 4.5
0 1.5
1.25(12.5) 0.5

3. Is voltage within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as
necessary.
Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go
to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 344 of 417

in the freeze frame data or enable conditions .

3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0454 Evaporative Emission System-Pressure Sensor
Intermittent
Component Location

cardiagn.com
General Description
The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere
where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure
Sensor (FTPS) is an integral part of the evaporative monitoring system. The PCM monitors the FTPS signal to detect vacuum
decay and excess vacuum. The FTPS measures the difference between the air pressure inside the fuel tank and outside air
pressure to check the purge control solenoid valve operation and for leak detection in the evaporative emission control system by
monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid valve operating cycles.

DTC Description
The PCM monitors pressure stability in the fuel tank by means of Fuel Tank Pressure Sensor (FTPS) for predetermined duration
just before start the leakage monitoring to detect noise signal of pressure sensor. The PCM sets DTC P0454 if the pressure
fluctuation is bigger than predetermined threshold.
If same error code is set in the next driving cycle, the PCM illuminates the MIL.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Noisy signal check

• 4°C(39.2°F) < Start Coolant temp. < 35°C(95°F)

• Ambient air temperature model >-10°C(14°F)
• Vehicle speed< 10km/h(6mph)
• Time after start >590 sec.
• Limited Canister saturation
Enable Conditions • Estimated altitude< 2.4km(8000ft) • Poor connection or damaged
• Idle speed engine operating state harness
• Minimum canister purge time: 5~25sec.(depending on • Faulty FTPS
canister load)
• Differential fuel tank Pressure : -11~4 hpa
• 11V < Battery voltage < 16V

• Leak detection test inhibited more than 3 times due to noise

Threshold Value
in tank pressure signal
Diagnostic Time • 3 times Leak test inhibited by Noisy signal

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 345 of 417

Mil On Condition • 2 Driving Cycles

Specification
Pressure -3.75 kPa(-1.10 inHg) 0 kPa(0 inHg) 1.25 kPa(0.37 inHg)
FTPS output voltage 4.5 V 1.5 V 0.5 V

cardiagn.com
Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 346 of 417

Monitor DTC Status

If DTCs (or pending codes) relating to FTPS are present, do ALL REPAIRS associated with those codes before proceeding
with this troubleshooting tree.

1. Start engine to normal operating temperature.

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

2. Install GDS and clear DTC

3. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1) Engine warm up at Idle Status
2) No relevant DTC
3) Fuel level is below 80%

cardiagn.com
4. Is DTC P0454 set again?

▶ Go to next step as below.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification
of Vehicle Repair" procedure.

Terminal and connection inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Go to next step as below.

Component Inspection
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between signal terminal of the sensor harness connector and chassis ground(Do not disconnect FTPS
harness connector)

Specification : Voltage increases proportionally with decreasing pressure(Approx. 2.5V to 4.5V)

Pressure(kPa(hPa)) Voltage(V)
-3.75(-37.5) 4.5
0 1.5
1.25(12.5) 0.5

3. Is voltage within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 347 of 417

locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure
▶ Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as
necessary.
Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go
to "Verification of Vehicle Repair" procedure

Verification of Vehicle Repair

1. Reconnect all EVAP hardware that was previously disconnected
2. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

3. Install GDS and clear DTC

4. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

cardiagn.com
EVAP. Leakage Test enable conditions
- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status
2. No relevant DTC
3. Fuel level is below 80%

5. Monitoring for (pending) DTC.Is the same DTC set?

▶ Go to the applicable troubleshooting procedure.

▶ System performing to specification at this time.

Fuel System > Engine Control System > P0455 Evaporative Emission System-Leak detected
(Large leak)
General Description
Due to the increasing ambient temperature of the fuel and the return of unused hot fuel from the engine, fuel vapors are
generated in the tank. In order to control the release of these vapors to the atmosphere, the evaporative emissions control system
is used. The evaporative emission control system reduces hydrocarbon (HC) emissions by trapping fuel tank vapors until they can
be burned in the combustion process. Evaporating fuel is stored in a charcoal canister until it can be flushed into the intake
manifold. The evaporative emission control system is made up of a fuel tank that can be completely sealed from outside air, a
Fuel Tank Pressure Sensor (FTPS), a Canister Close Valve (CCV) that seals the canister from the outside air, a canister filled
with activated charcoal granules, a Purge Control Solenoid Valve (PCSV). The evaporative emission system can be checked for
leaks by sealing the system off from the outside air, creating a vacuum, and monitoring if the system can hold that vacuum
sufficiently for a set amount of time. If it cannot, a leak exists somewhere in the system.

DTC Description
The PCM closes the Canister Close Valve (CCV) at the charcoal canister to seal off the evaporative emission system and then
opens purge control valve (PCSV) to generate a vacuum in the fuel tank. This vacumm generation phase will determine if there is
a large leak like tank cap open or canister shut off valve (CCV) stuck open. The PCM sets DTC P0455 if the pressure in the fuel
tank does not drop as low as predetermined threshold during predetermined maximum vacuum generation period.
If the same error code is set in the next driving cycle, the PCM illuminates the MIL.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Check fuel tank underpressure during evacuation

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 348 of 417

• 4°C(39.2°F) < Start Coolant temp. < 35°C(95°F)

• Ambient air temperature model >-10°C(14°F)
• Vehicle speed< 10km/h(6mph)
• Time after start >590 sec.
• Limited Canister saturation
Enable Conditions • Estimated altitude< 2.4km(8000ft)
• Idle speed engine operating state
• Minimum canister purge time: 5~25sec.(depending on
canister load)
• Differential fuel tank Pressure : -11~4 hpa
• Leakage in EVAP. System
• 11V < Battery voltage < 16V

• Time to generate underpressure < -1500Pa(-15hPa) in fuel

Case1
Threshold tank too long
Value • Time for tank pressure to decrease < 150 Pa(1.5 hPa)
Case2
during Evacuation
Diagnostic Case1 • 30 sec. in idle when all enable conditions fulfilled
Time
Case2 • 20 sec. in idle when all enable conditions fulfilled

Mil On Condition • 2 Driving Cycles

cardiagn.com
Diagnostic Circuit Diagram

Monitor DTC Status

If any codes relating to Fuel tank pressure sensor, Canister closing valve or PCSV circuits are present, do ALL REPAIRS
associated with those codes before proceeding with this troubleshooting tree.

1. Start engine to normal operating temperature

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 349 of 417

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

2. Install GDS and clear DTC

3. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1) Engine warm up at Idle Status
2) No relevant DTC
3) Fuel level is below 80%

4. Is DTC P0455 set again?

▶ Go to next step as below.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification
of Vehicle Repair" procedure.

cardiagn.com
Component Inspection
■ Fuel Filler Cap & Pipe Inspection
1. Check fuel filler cap for being tightly installed, has o-ring seal installed and is in good condition.
2. Verify cap releases pressure / vacuum at specified values

Specification : Approx. 2 psi pressure and approximately 1.5 inches of mercury vacuum).

3. Are cap, o-ring and release pressures okay?

▶ Thoroughly check fuel filler pipe for cracks, damage and o-ring seat for deformation and replace as
necessary. Go to next step as below.
▶ Replace fuel filler cap and go to "Verification of Vehicle Repair" procedure

■ PCSV to Intake manifold Line Inspection

1. Ignition "OFF"
2. Disconnect the hose leading from the PCSV to intake manifold at intake manifold.
3. Using a vacuum pump, apply vacuum to the manifold side of the vacuum hose and verify PCSV holds vacuum.
4. Ignition "ON" & Engine "OFF"
5. Install GDS and select "EVAP PURGE VALVE" on the Actuation Test mode
6. Activates "EVAP PURGE VALVE" by pressing "STRT(F1)" key
7. Verify PCSV release vacuum while valve is activating(should hear a faint click from PCSV)
8. Repeat this procedure 4 or 5 times to ensure PCSV reliability.
Specification:

Test Condition Specification

PCSV is ON(should hear a faint click from PCSV) Holds vacuum
PCSV is OFF Release vacuum

9. Is PCSV working properly?

▶ Go to next step as below

▶ Verify arrow on PCSV is pointing towards intake manifold. If it is not, reverse installation. Reinstall as
necessary and go to "Verification of Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 350 of 417

If OK, thoroughly check fuel vapor hoses and hose clamps between PCSV and intake manifold. Repair as
necessary. If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace
PCSV and go to "Verification of Vehicle Repair" procedure

■ Canister Closing Valve(CCV) Line Inspection

1. Reconnect all EVAP hardware that was previously disconnected
2. Disconnect hose connecting Canister Closing Valve(CCV) to canister
3. Ignition "ON" & Engine "OFF"
4. Blow air to the canister side of the valve and verify air escapes to the air filter side.
5. Install GDS and select "CANISTER CLOSE VALVE" on the Actuation Test mode
6. Activates "CANISTER CLOSE VALVE" by pressing "STRT(F1)" key
7. Blow air into hose and verify air does not escape.
8. Repeat this procedure 4 or 5 times to ensure CCV reliability.
9. Is CCV working properly?

▶ Go to next step as below

▶ Check for cracks or damage in hose connecting CCV and canister. Repair or replace as necessary and
go to "Verification of Vehicle Repair" procedure.
If OK, replace CCV. If CCV was stuck closed, inspect all lines and canister for liquid fuel. Replace any
contaminated components and blow out lines and go to "Verification of Vehicle Repair" procedure

cardiagn.com
■ Fuel Tank Pressure Sensor(FTPS) Inspection
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between signal terminal of the sensor harness connector and chassis ground(Do not disconnect FTPS
harness connector)

Specification : Voltage increases proportionally with decreasing pressure(Approx. 2.5V to 4.5V)

Pressure(kPa(hPa)) Voltage(V)
-3.75(-37.5) 4.5
0 1.5
1.25(12.5) 0.5

3. Is voltage within the specification?

▶ Go to "Purge Control Solenoid Valve(PCSV) Inspection" procedure

▶ Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as
necessary.
Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go
to "Verification of Vehicle Repair" procedure

■ PCSV to Canister Line Inspection

1. Check for leakage in hose
(1) Reconnect all EVAP hardware that was previously disconnected
(2) Disconnect the hose leading from the canister to the PCSV at canister
(3) Using a vacuum pump, apply specified vacuum[Approx. 4 inHg(14 kPa)] to the manifold side of the valve for 1 minute and
verify PCSV holds vacuum.
(4) Is pressure within specification?

▶ Go to next step as below

▶ Check for cracks or damage in hose connecting PCSV and canister. Repair or replace as necessary
and go to "Verification of Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 351 of 417

2. Check for leakage in canister

(1) Disconnect hose clamps and remove canister assembly
(2) Block the hose of between:
- Canister and fuel filler neck
- Canister and CCV
- Canister and PCSV
(3) Apply maximum of 4 inHg(14 kPa) pressure through fuel tank port from canister
(4) With system sealed and pressurized, check for leaks
(5) Were any leak(s) found?

▶ Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure

▶ Go to "Fuel Tank Line Inspection" procedure

■ Fuel Tank Line Inspection

1. Relieve the fuel system pressure and remove the fuel tankCaution)
Before removing the fuel tank, make sure the fuel hoses are not leaking.
2. Block all of the following outlets:
(1) Fuel lines
(2) Fuel filler neck
3. Apply maximum of 10cmHg(4 inHg) pressure to the EVAP. hose at the fuel tank. Then, pinch the EVAP. hose to retain the

cardiagn.com
pressure
4. Check the suspect area for leaks with a soap solution.
5. Were any leak(s) found?

▶ Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure

Verification of Vehicle Repair

1. Reconnect all EVAP hardware that was previously disconnected
2. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

3. Install GDS and clear DTC

4. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status
2. No relevant DTC
3. Fuel level is below 80%

5. Monitoring for (pending) DTC.Is the same DTC set?

▶ Go to the applicable troubleshooting procedure.

▶ System performing to specification at this time.

Fuel System > Engine Control System > P0456 Evaporative Emission System-Leak detected
(very small leak)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 352 of 417

General Description
Due to the increasing ambient temperature of the fuel and the return of unused hot fuel from the engine, fuel vapors are
generated in the tank. In order to control the release of these vapors to the atmosphere, the evaporative emissions control system
is used. The evaporative emission control system reduces hydrocarbon (HC) emissions by trapping fuel tank vapors until they can
be burned in the combustion process. Evaporating fuel is stored in a charcoal canister until it can be flushed into the intake
manifold. The evaporative emission control system is made up of a fuel tank that can be completely sealed from outside air, a
Fuel Tank Pressure Sensor (FTPS), a Canister Close Valve (CCV) that seals the canister from the outside air, a canister filled
with activated charcoal granules, a Purge Control Solenoid Valve (PCSV). The evaporative emission system can be checked for
leaks by sealing the system off from the outside air, creating a vacuum, and monitoring if the system can hold that vacuum
sufficiently for a set amount of time. If it cannot, a leak exists somewhere in the system.

DTC Description
The PCM closes the Canister Close Valve (CCV) at the charcoal canister to seal off the evaporative emission system and then
opens purge control valve (PCSV) to generate a vacuum in the fuel tank. After vacuum generation, the PCM measures pressure
differential curve in the fuel tank and sets DTC P0442 or P0456 if the vacuum generated within a monitoring period increases
above a defined threshold.
If same error code is set in the next driving cycle, the PCM illuminates the MIL.

DTC Detecting Condition

Item Detecting Condition Possible Cause
• Monitoring Fuel Tank Pressure Trend after generating
DTC Strategy

cardiagn.com
underpressure in Fuel Tank
• Fuel filler cap damage or missing
• 4°C(39.2°F) < Start Coolant temp.< 35°C(95°F) • Faulty or damaged fuel filler pipe
• Ambient Air temperature model > -10°C • Leaking, disconnected or plugged
• Time after Start 590 sec. fuel vapor lines
• Vehicle speed< 5km/h(3mph) • CANISTER CLOSE VALVE
• Estimated altitude< 2.4km(8000ft) • PCSV
Enable Conditions
• Differential fuel tank pressure: -11 ~ 4hPa • Canister
• Limited canister saturation >-10% • Faulty Fuel Tank Pressure
• Minimum purge time 5~25 sec(depending on canister load) Sensor (FTPS)
• No relevant failure • Fuel in lines due to faulty Rollover
• 11V < Battery voltage > 16V Valve
• On-Board Refueling Vapor
Threshold Value • 0.73mm (0.03in) > Leak diameter > 0.42mm (0.017in)
Recovery Valve (ORVR valve) or
Diagnostic Time • 30 sec. In idle when all enable conditions fulfilled stuck closed CCV

Mil On Condition • 3 Driving Cycles

Monitor DTC Status

1. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

2. Install GDS and clear DTC

3. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1) Engine warm up at Idle Status
2) No relevant DTC
3) Fuel level is below 80%

4. Is DTC P0455 set again?

▶ Go to next step as below

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 353 of 417

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification
of Vehicle Repair" procedure

Component Inspection
■ PCSV to Intake manifold Line Inspection
1. Ignition "OFF"
2. Disconnect the hose leading from the PCSV to the intake manifold at PCSV
3. Using a vacuum pump, apply specified vacuum[Approx. 25cmHg(10 inHg)] to the manifold side of the valve and verify PCSV
holds vacuum.
4. Ignition "ON" & Engine "OFF"
5. Install GDS and select "EVAP PURGE VALVE" on the Actuation Test mode
6. Activates "EVAP PURGE VALVE" by pressing "STRT(F1)" key
7. Verify PCSV release vacuum while valve is activating(should hear a faint click from PCSV)
8. Repeat this procedure 4 or 5 times to ensure PCSV reliability.
Specification:

Test Condition Specification

cardiagn.com
PCSV is ON(should hear a faint click from PCSV) Holds vacuum
PCSV is OFF Release vacuum

9. Is PCSV working properly?

▶ Go to next step as below

▶ Verify arrow on PCSV is pointing towards intake manifold. If it is not, reverse installation. Reinstall as
necessary and go to "Verification of Vehicle Repair" procedure.
If OK, thoroughly check fuel vapor hoses and hose clamps between PCSV and intake manifold. Repair as
necessary. If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace
PCSV and go to "Verification of Vehicle Repair" procedure

■ Canister Closing Valve(CCV) Line Inspection

1. Reconnect all EVAP hardware that was previously disconnected
2. Disconnect hose connecting Canister Closing Valve(CCV) to canister
3. Ignition "ON" & Engine "OFF"
4. Blow air to the canister side of the valve and verify air escapes to the air filter side.
5. Install GDS and select "CANISTER CLOSE VALVE" on the Actuation Test mode
6. Activates "CANISTER CLOSE VALVE" by pressing "STRT(F1)" key
7. Blow air into hose and verify air does not escape.
8. Repeat this procedure 4 or 5 times to ensure CCV reliability.
9. Is CCV working properly?

▶ Go to next step as below

▶ Check for cracks or damage in hose connecting CCV and canister. Repair or replace as necessary and
go to "Verification of Vehicle Repair" procedure.
If OK, replace CCV. If CCV was stuck closed, inspect all lines and canister for liquid fuel. Replace any
contaminated components and blow out lines and go to "Verification of Vehicle Repair" procedure

■ Fuel Tank Pressure Sensor(FTPS) Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage between signal terminal of the sensor harness connector and chassis ground(Do not disconnect FTPS
harness connector)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 354 of 417

Specification : Voltage increases proportionally with decreasing pressure(Approx. 2.5V to 4.5V)

Pressure(kPa(hPa)) Voltage(V)
-3.75(-37.5) 4.5
0 1.5
1.25(12.5) 0.5

3. Is voltage within the specification?

▶ Go to "Purge Control Solenoid Valve(PCSV) Inspection" procedure

▶ Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as
necessary.
Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go
to "Verification of Vehicle Repair" procedure

■ PCSV to Canister Line Inspection

1. Check for leakage in hose
(1) Reconnect all EVAP hardware that was previously disconnected
(2) Disconnect the hose leading from the canister to the PCSV at canister

cardiagn.com
(3) Using a vacuum pump, apply specified vacuum[Approx. 4 inHg(14 kPa)] to the manifold side of the valve for 1 minute and
verify PCSV holds vacuum.
(4) Is pressure within specification?

▶ Go to next step as below

▶ Check for cracks or damage in hose connecting PCSV and canister. Repair or replace as necessary
and go to "Verification of Vehicle Repair" procedure

2. Check for leakage in canister

(1) Disconnect hose clamps and remove canister assembly
(2) Block the hose of between:
- Canister and fuel filler neck
- Canister and CCV
- Canister and PCSV
(3) Apply maximum of 4 inHg(14 kPa) pressure through fuel tank port from canister
(4) With system sealed and pressurized, check for leaks
(5) Were any leak(s) found?

▶ Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

■ Fuel Tank Line Inspection

1. Relieve the fuel system pressure and remove the fuel tankCaution)
Before removing the fuel tank, make sure the fuel hoses are not leaking.
2. Block all of the following outlets:
(1) Fuel lines
(2) Fuel filler neck
3. Apply maximum of 10cmHg(4 inHg) pressure to the EVAP. hose at the fuel tank. Then, pinch the EVAP. hose to retain the
pressure
4. Check the suspect area for leaks with a soap solution.
5. Were any leak(s) found?

▶ Repair or replace leaking system component(s) and go to "Verification of Vehicle Repair" procedure

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 355 of 417

locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.

Verification of Vehicle Repair

1. Reconnect all EVAP hardware that was previously disconnected
2. Start engine to normal operating temperature

Evaporative Emissions Systems (EVAP) Leak Tests can be run by the GDS. The tests are automated and provide either
a pass-fail result or directions to check for DTCs.

3. Install GDS and clear DTC

4. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below

EVAP. Leakage Test enable conditions

- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status
2. No relevant DTC
3. Fuel level is below 80%

cardiagn.com
5. Monitoring for (pending) DTC.Is the same DTC set?

▶ Go to the applicable troubleshooting procedure.

▶ System performing to specification at this time.

Fuel System > Engine Control System > P0501 Vehicle Speed Sensor \'A\' Range/Performance
General Description
The Wheel Speed Sensor (WSS) generates a waveform with a frequency proportional to the speed of the vehicle. The signal
generated by the WSS informs the PCM not only if the vehicle speed is low or high but also if the vehicle is or is not moving. The
PCM uses this signal to control the fuel injection, ignition timing, transaxle shift scheduling and torque converter clutch
scheduling. The WSS signal is also used to detect rough road conditions.

DTC Description
The PCM evaluates engine speed and mass air flow if there is no vehicle speed signal. This evaluation of both values will detect
open circuit or short circuit errors on the wheel speed sensor. The PCM sets DTC P2159 if there is no vehicle speed signal from
wheel speed sensor while both engine speed and mass air flow are higher than predetermined threshold during the
predetermined time

DTC Detecting Condition

Item Detecting Condition Possible Cause

DTC case1 • Plausibility Check

Strategy case2 • Electrical Check

• Engine speed >2100rpm

• Engine Load > 446 mg/rev
case1 • No fuel injection shut off • Open or short in harness
Enable • Coolant Temp. > 60°C(140°F) • Poor connection or damaged
Conditions harness
• 10V < Battery voltage < 16 V
• VSS
• Vehicle speed > 0
case2
• 10V < Battery voltage < 16 V

Threshold case1 • Vehicle Speed = 0 with high engine speed and engine load
Value

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 356 of 417

case2 • Signal voltage exceeds threshold

Diagnostic case1 • 60sec.

Time case2 • 10sec.

Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 357 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Signal Circuit Inspection

■ [With ABS]
1. Check for short to ground in signal circuit
(1) Ignition "OFF"
(2) Disconnect PCM and ABS Control Module connectors
(3) Measure resistance between Vehicle speed input terminal of PCM harness connector and chassis ground.

Specification : Infinite

(4) Is resistance within the specification?

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2. Check for short to battery in signal circuit

(1) Ignition "ON" & Engine"OFF"
(2) Measure voltage between Vehicle speed input terminal of PCM harness connector and chassis ground

Specification : Approx. 0V

(3) Is voltage within the specification?

▶ Go to next step as below

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 358 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

3. Check for open in signal circuit

(1) Ignition "OFF"
(2) Measure resistance between terminals 53 of the PCM harness connector and 14 of the ABS Control Module harness
connector

Specification : Approx. 0Ω

(3) Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating,
broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of
Vehicle Repair" procedure
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

■ [Without ABS system]

1. Check for short to ground in Signal circuit
(1) Ignition "OFF"
(2) Measure resistance between Vehicle speed input terminal of PCM harness connector and Vehicle speed output terminal of

cardiagn.com
ABS/ESP Control Module harness connector.

Specification : Infinite

(3) Is resistance within the specification?

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2. Check for short to battery in signal circuit

(1) Ignition "ON" & Engine"OFF"
(2) Measure voltage between Vehicle speed input terminal of PCM harness connector and chassis ground

Specification : Approx. 0V

(3) Is voltage within the specification?

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

3. Check for open in signal circuit

(1) Ignition "OFF"
(2) Measure resistance between Vehicle speed input terminal of PCM harness connector and Vehicle speed output terminal of
ABS/ESP Control Module harness connector.

Specification : Approx. 0Ω

(3) Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating,
broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of
Vehicle Repair" procedure
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 359 of 417

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0505 Idle Air Control System
Component Location

cardiagn.com
General Description
When the TP sensor’s signal indicates closed throttle position and the engine is idling, the PCM adjusts the idle speed control
actuator so that the engine runs at the correct idling speed, regardless of coolant temperature, load and etc. When the additional
load applied in the engine, the air flow through the idle speed control actuator is increased momentarily to raise the idling speed.

DTC Description
The PCM monitors engine speed deviation from the target idle engine speed when the vehicle is stopped and the throttle valve
opening is stable. The PCM sets DTC P0505 if the difference to the target idle engine speed is lower or higher than the
predetermined threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Plausibilit Check

• No relevant failure
• Catalyst heating active • A stuck or binding throttle plate
• Drive train is not engaged • Maladjustment of the accelerator
Enable Conditions • Estimated altitude > 820 hpa cable
• 11V< Battery voltage <16V • Restriction in intake or exhaust
• Time after start elapsed > 20 sec. system
• Lambda controller not active • Carbonustment of the accelerator
cable
• Integral of deviation between MAP_setpoint and • Contact resistance in connectors
Threshold Value
MAP_sensor > threshold value.
• Faulty ICA valve
Diagnostic Time • 12 seconds

Mil On Condition • 2 Driving Cycles

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 360 of 417

Signal Waveform & Data

cardiagn.com
Fig 1) The above waveforms are the voltage signals generated when the ISCA operates. This ISCA is a duty type and the time
opened determines the duty amount. The left side is the waveform of the ISCA Opening coil during idle.
The right side is the waveform of the ISCA Closing coil during idle.

Monitor DTC Status

If any MAFS or ISCA codes are present, do ALL REPAIRS associated with them before proceeding with this troubleshooting
tree.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 361 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

System Inspection
■ Air Leakage Inspection
1. Visually/physically inspect the air leakage in intake/exhaust system as following items,
- Check for throttle Plate being held open with excessive carbon deposits
- Vacuum hoses for splits, kinks and improper connections.
- Throttle body gasket
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
- Gasket between intake manifold and cylinder head
- Seals between intake manifold and fuel injectors
- Exhaust system between HO2S and Three way catalyst for air leakage
2. Was a problem found in any of the above areas?

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

■ Check for restricted intake or exhaust system

1. Visually/physically inspect the following items:
- Air cleaner filter element for excessive dirt or for any foreign objects
- Throttle body inlet for damage or for any foreign objects
- Restricted exhaust system
2. Was a problem found in any of the above areas?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 362 of 417

▶ Go to next step as below

■ Accelerator Cable & Throttle plate Inspection

1. Visually/physically inspect the following items. Repair or adjust as necessary and go to next step.
- Check that the Accelerator Cable is not sticking or moving sluggishly.
- Check Accelerator Cable free play [0.040~0.120 in. (1.0~3.0 mm)].
2. Remove Intake Hose and inspect Throttle Plate for excessive carbon deposits.
3. Is Throttle Plate being held open with excessive carbon deposits?

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

cardiagn.com
▶ Go to next step as below

Component Inspection
■ ISCA Inspection
1. Ignition "OFF".
2. Remove ISCA from Throttle body and Check for throttle bore, throttle plate and the ISCA passages for chocking and for any
foreign objects. Repair or clean as necessary.
3. Ignition "ON" & Engine "OFF".
4. Connect GDS and select "IDLE SPEED ACTUATOR" parameter on the "ACTUATION TEST" mode.
5. Activates ISCA by pressing "STAT" key.
6. Check the ISCA for clicking sound and visually verifying valve closes and opens.

Repeat numerous times to ensure valve reliability.

7. Is ISCA Valve moving freely and not carbon fouled?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure
▶ Check ISCA valve for contamination, deterioration, or damage. Substitute with a known-good ISCA
valve and check for proper operation. If the problem is corrected, replace ISCA valve and then go to
"Verification of Vehicle Repair" procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 363 of 417

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0506 Idle Air Control System-RPM Lower than
Expected
Component Location

cardiagn.com
General Description
When the TP sensor’s signal indicates closed throttle position and the engine is idling, the PCM adjusts the idle speed control
actuator so that the engine runs at the correct idling speed, regardless of coolant temperature, load and etc. When the additional
load applied in the engine, the air flow through the idle speed control actuator is increased momentarily to raise the idling speed.

DTC Description
The PCM monitors engine speed deviation from the target idle engine speed when the vehicle is stopped and the throttle valve
opening is stable. The PCM sets DTC P0506 if the difference to the target idle engine speed is lower than the predetermined
threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
• Monitor deviation between target idle speed and actual
DTC Strategy
engine speed

• Coolant temperature >74°C(165.2°F)

• Closed throttle : 10sec.(continuously)
• Vehicle speed = 0 • Restriction in intake or exhaust
Enable Conditions • 20 sec. after engine start. system
• 10V< Battery voltage <16V • Carbonustment of the accelerator
• No relevant failure cable
• Engine load < 1000 mg/rev • Contact resistance in connectors
• Faulty ICA valve
• Engine speed-Target idle speed < -100rpm (Engine speed
Threshold Value
too low)
Diagnostic Time • 16 seconds

Mil On Condition • 2 Driving Cycles

Signal Waveform & Data

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 364 of 417

cardiagn.com
Fig 1) The above waveforms are the voltage signals generated when the ISCA operates. This ISCA is a duty type and the time
opened determines the duty amount. The left side is the waveform of the ISCA Opening coil during idle.
The right side is the waveform of the ISCA Closing coil during idle.

Monitor DTC Status

If any MAFS or ISCA codes are present, do ALL REPAIRS associated with them before proceeding with this troubleshooting
tree.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 365 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

System Inspection
■ Check for restricted intake or exhaust system
1. Visually/physically inspect the following items:
- Air cleaner filter element for excessive dirt or for any foreign objects
- Throttle body inlet for damage or for any foreign objects
- Restricted exhaust system
2. Was a problem found in any of the above areas?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 366 of 417

Component Inspection
■ ISCA Inspection
1. Ignition "OFF".
2. Remove ISCA from Throttle body and Check for throttle bore, throttle plate and the ISCA passages for chocking and for any
foreign objects. Repair or clean as necessary.
3. Ignition "ON" & Engine "OFF".
4. Connect GDS and select "IDLE SPEED ACTUATOR" parameter on the "ACTUATION TEST" mode.
5. Activates ISCA by pressing "STAT" key.
6. Check the ISCA for clicking sound and visually verifying valve closes and opens.

Repeat numerous times to ensure valve reliability.

7. Is ISCA Valve moving freely and not carbon fouled?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure.
▶ Check ISCA valve for contamination, deterioration, or damage. Substitute with a known-good ISCA
valve and check for proper operation. If the problem is corrected, replace ISCA valve and then go to
"Verification of Vehicle Repair" procedure.

cardiagn.com
Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0507 Idle Air Control System-RPM Higher than
Expected
Component Location

General Description
When the TP sensor’s signal indicates closed throttle position and the engine is idling, the PCM adjusts the idle speed control
actuator so that the engine runs at the correct idling speed, regardless of coolant temperature, load and etc. When the additional

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 367 of 417

load applied in the engine, the air flow through the idle speed control actuator is increased momentarily to raise the idling speed.

DTC Description
The PCM monitors engine speed deviation from the target idle engine speed when the vehicle is stopped and the throttle valve
opening is stable. The PCM sets DTC P0507 if the difference to the target idle engine speed is higher than the predetermined
threshold.

DTC Detecting Condition

Item Detecting Condition Possible Cause
• Monitor deviation between target idle speed and actual
DTC Strategy
engine speed

• Coolant temperature >74°C(165.2°F)

• Closed throttle : 10sec.(continuously)
• Vehicle speed = 0
• A stuck or binding throttle plate
Enable Conditions • 20 sec. after engine start.
• Maladjustment of the accelerator
• 10V< Battery voltage <16V cable
• No relevant failure • Contact resistance in connectors
• Engine load < 1000 mg/rev • Faulty ICA valve
• Engine speed-Target idle speed > +200rpm (Engine speed
Threshold Value
too high)

cardiagn.com
Diagnostic Time • 16 seconds

Mil On Condition • 2 Driving Cycles

Signal Waveform & Data

Fig 1) The above waveforms are the voltage signals generated when the ISCA operates. This ISCA is a duty type and the time
opened determines the duty amount. The left side is the waveform of the ISCA Opening coil during idle.
The right side is the waveform of the ISCA Closing coil during idle.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 368 of 417

Monitor DTC Status

If any MAFS or ISCA codes are present, do ALL REPAIRS associated with them before proceeding with this troubleshooting
tree.

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

System Inspection
■ Accelerator Cable & Throttle plate Inspection
1. Visually/physically inspect the following items. Repair or adjust as necessary and go to next step.
- Check that the Accelerator Cable is not sticking or moving sluggishly.
- Check Accelerator Cable free play [0.040~0.120 in. (1.0~3.0 mm)].
2. Remove Intake Hose and inspect Throttle Plate for excessive carbon deposits.
3. Is Throttle Plate being held open with excessive carbon deposits?

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 369 of 417

■ Air Leakage Inspection

1. Visually/physically inspect the air leakage in intake/exhaust system as following items,
- Check for throttle Plate being held open with excessive carbon deposits
- Vacuum hoses for splits, kinks and improper connections.
- Throttle body gasket
- Positive crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning .
- Gasket between intake manifold and cylinder head
- Seals between intake manifold and fuel injectors
- Exhaust system between HO2S and Three way catalyst for air leakage
2. Was a problem found in any of the above areas?

▶ Replace or repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

cardiagn.com
▶ Go to next step as below

Component Inspection
■ ISCA Inspection
1. Ignition "OFF".
2. Remove ISCA from Throttle body and Check for throttle bore, throttle plate and the ISCA passages for chocking and for any
foreign objects. Repair or clean as necessary.
3. Ignition "ON" & Engine "OFF".
4. Connect GDS and select "IDLE SPEED ACTUATOR" parameter on the "ACTUATION TEST" mode.
5. Activates ISCA by pressing "STAT" key.
6. Check the ISCA for clicking sound and visually verifying valve closes and opens.

Repeat numerous times to ensure valve reliability.

7. Is ISCA Valve moving freely and not carbon fouled?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure
▶ Check ISCA valve for contamination, deterioration, or damage. Substitute with a known-good ISCA
valve and check for proper operation. If the problem is corrected, replace ISCA valve and then go to
"Verification of Vehicle Repair" procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 370 of 417

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0560 System Voltage
Component Location

cardiagn.com
General Description
The PCM provides ground to one side of the coil of the main relay and the other side is connected to the battery. The PCM
monitors battery voltage and the voltage after the main relay.

DTC Description
The PCM measures the voltage from ignition key and from main relay respectively and compares two voltages. This comparison
will watch if the Main Relay has switched and remains on after ignition Key-On and if it has switched off after the ignition Key-Off.
The PCM sets DTC P0560 if the voltage after Main Relay is lower than a predetermined threshold after ignition key-on or higher
than a predetermined threshold after ignition key-off.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC
• Comparison of Battery Voltage and Voltage after Main Relay
Strategy
• Ignition "ON"
Enable case1
• Battery voltage >10V
Conditions
case2 • Ignition "OFF" • Open or short circuit
case1 • Voltage after Main Relay <6 V • Poor connection or damaged
Threshold
harness
Value case2 • Voltage after Main Relay >6 V

Diagnostic case1 • 180 msec.

Time case2 • 180 msec.

Mil On Condition •-

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 371 of 417

cardiagn.com
Signal Waveform & Data

Fig 1) Open circuit in Main relay control of the PCM harness terminal : Approx. 0.2V(Battery voltage parameter)

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 372 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. With Ignition OFF, remove the main relay
2. Measure resistance between power terminal and control terminal of the main relay(Component side).

Specification : Approx. 70~120Ω at 20°C(68°F)

3. Apply 12V and a ground to power and control terminals of the main relay(Components side).
4. Check if the main relay works well when it is energized. (If the main relay works normally, a clicking sound can be heard.)
5. Does the main relay operate normally?

▶ Go to next step as below.

▶ Check main relay for contamination, deterioration, or damage. Substitute with a known-good main relay
and check for proper operation. If the problem is corrected, replace main relay and then go to "Verification
of Vehicle Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between power terminals of the main relay harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 373 of 417

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

4. Measure the voltage between 'power to sensor' terminal of the main relay harness connector and chassis ground.

Approx. 1.5V

5. Is value within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection

1. Ignition "OFF"
2. With ECM connector disconnected, measure voltage between main relay control terminal of the PCM harness connector and
chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

cardiagn.com
▶ Go to next step as below.

▶ Check control circuit for open or short circuit between main relay and PCM. Repair as necessary and go
to "Verification of Vehicle Repair" procedure.

■ Ignition Switch Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between 'ON/START Input' terminal of the ECM harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 374 of 417

4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0562 System Voltage Low
Component Location

cardiagn.com
General Description
The PCM provides ground to one side of the coil of the main relay and the other side is connected to the battery. The PCM
monitors battery voltage and the voltage after the main relay.

DTC Description
PCM sets DTC P0562 if the PCM detects system voltage lower than the possible range of battery voltage.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

Enable Conditions • No main relay failure

• Contact resistance in connectors
Threshold Value • Voltage after main relay when ON < 10V
• Faulty charging system
Diagnostic Time • 30 sec.

Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 375 of 417

cardiagn.com
Signal Waveform & Data

Fig 1) Open circuit in Main relay control of the PCM harness terminal : Approx. 0.2V(Battery voltage parameter)

Monitor DTC Status

If any codes relating to system voltage(P0562) is stored, do ALL REPAIRS associated with those codes before proceeding
with troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 376 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

System Inspection
1. Start the engine and raise the engine speed to 2,500~3,000 RPM
2. Turn ON all electrical loads by turning on the headlamps, and by turning on the high blower motor, etc
3. Monitor the battery(ignition) voltage parameter on the Scantool data list
Specification :

Ambient temperature °C(°F) Reference Voltage(V)

-20(-4) Approx. 14.2~15.4
20(68) Approx. 14.0~15.0
60(140) Approx. 13.7~14.9
80(176) Approx. 13.5~14.7

4. Is the battery voltage within the specification?

▶ Go to next step as below

▶ Possibility of charging system malfunction. Repair or replace alternator and battery. Refer to Charging
System group in Workshop manual. And then go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 377 of 417

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0563 System Voltage High
Component Location

General Description
The PCM provides ground to one side of the coil of the main relay and the other side is connected to the battery. The PCM
monitors battery voltage and the voltage after the main relay.

DTC Description
PCM sets DTC P0563 if the PCM detects system voltage higher than the possible range of battery voltage.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

Enable Conditions • Vehicle speed > 10kph(6mph)

• Contact resistance in connectors
Threshold Value • Voltage after main relay when ON > 16V
• Faulty charging system
Diagnostic Time • 30 sec.

Mil On Condition • 2 Driving Cycles

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 378 of 417

Diagnostic Circuit Diagram

cardiagn.com
Signal Waveform & Data

Fig 1) Open circuit in Main relay control of the PCM harness terminal : Approx. 0.2V(Battery voltage parameter)

Monitor DTC Status

If any codes relating to system voltage(P0563) is stored, do ALL REPAIRS associated with those codes before proceeding
with troubleshooting

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode

2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 379 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

System Inspection
1. Start the engine and raise the engine speed to 2,500~3,000 RPM
2. Turn ON all electrical loads by turning on the headlamps, and by turning on the high blower motor, etc
3. Monitor the battery(ignition) voltage parameter on the Scantool data list
Specification :

Ambient temperature °C(°F) Reference Voltage(V)

-20(-4) Approx. 14.2~15.4
20(68) Approx. 14.0~15.0
60(140) Approx. 13.7~14.9
80(176) Approx. 13.5~14.7

4. Is the battery voltage within the specification?

▶ Go to next step as below

▶ Possibility of charging system malfunction. Repair or replace alternator and battery. Refer to Charging
System group in Workshop manual. And then go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 380 of 417

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Engine Control System > P0605 Internal Control Module Read Only Memory
(ROM) Error
Component Location

General Description
A malfunction is detected by using a checksum technique for verifying data. The digital data is composed of zeros and ones. A
checksum is the total of all ones in a string of data. By comparing the checksum value with a stored value, a malfunction can be
detected.

DTC Description
The PCM monitors RAM areas and communication connections between microcontroller and output drivers and sets DTC P0605
if failure is detected.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Check RAM Area / Communication connections

Enable Conditions •-
• Contact resistance in connectors
Threshold Value • RAM test or checksum error
• Faulty PCM
Diagnostic Time • 100 msec.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 381 of 417

Mil On Condition • 2 Driving Cycles

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Terminal and Connector Inspection

■ Back Up Voltage Inspection
1. Ignition "OFF"
2. Disconnect PCM connector
3. Ignition "ON"
4. Are circuits remaining stable at battery voltage?

▶ Using a scan tool, check PCM software version and upgrade as necessary. If version is the newest one,
check PCM for contamination, deterioration, or damage. Substitute with a known-good PCM and check for
proper operation. If the problem is corrected, replace PCM and then go to "Verification of Vehicle Repair"
procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 382 of 417

It is necessary to perform the TPS adaptation procedure with Scan tool when the throttle body
assembly or PCM is replaced.
■ TPS adaptation procedure
1. Erase previous TPS adaptation value using Scan tool.
2. Ignition "OFF" and then "ON" without cranking. Wait for 10 seconds under enable conditions
- Enable conditions : Battery >10V & Intake Air Temp. >5.3°C(41.5°F) & 5.3°C(41.5°F) <Engine
CoolantTemp. <99.8°C(211.6°F)
3. After TPS adaptation, the system normality should be confirmed by reading out "FMY" on the Scan
Tool

▶ If voltage fluctuates, check circuit for loose, bent or corroded terminals, Repair as necessary and go to
"Verification of Vehicle Repair" procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .

cardiagn.com
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0630 VIN Not Programmed or Incompatible-ECM/PCM
General Description
Regulations require that all 2005 and subsequent model year vehicles shall have the Vehicle Identification Number(VIN) available
in a standardized format through the standardized data link connector in accordance with SAE J1979 specifications. Using a scan
tool, PERFORM "VIN WRITING" procedure after replacing or reflashing a PCM.

DTC Description
The PCM monitors ROM areas and sets DTC P0630 if there is no Vehicle Identification Number(VIN) information.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Check whether VIN is exist

Enable Conditions •-
• PCM is Virgin(not programmed)
Threshold Value •-
status
Diagnostic Time •-

Mil On Condition • Immediate

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 383 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

System Inspection
1. Was the PCM just replaced or reflashed?

▶ Using a scan tool, perform "VIN WRITING" procedure. Refer to the latest Reference manual for scan
tool and go to "Verification of Vehicle Repair" procedure
▶ Using a scan tool, read VIN information.
If there is no proper VIN information, perform "VIN WRITING" procedure.
If VIN information exists, substitute with a known-good PCM and check for proper operation. If the
problem is corrected, replace PCM.
And go to "Verification of Vehicle Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 384 of 417

Fuel System > Engine Control System > P0650 Malfunction Indicator Lamp (MIL) Control Circuit
General Description
The Malfunction Indicator Lamp (MIL), which is located in the instrument cluster, comes on to notify the driver that there may be a
problem with the vehicle and that service is needed. Immediately after the ignition switch turns on, the malfunction indicator lamp
is lit to indicate that the MIL operates normally and goes off after starting

DTC Description
PCM sets DTC P0650 if the PCM detects that the MIL control line is open or short circuit to ground or battery line.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check
• Open or short between MIL and
Enable Conditions • 10V < Battery voltage < 16V
PCM
Threshold Value • Short to ground or battery or line break • Poor connection or damaged
harness
Diagnostic Time • 10 sec.
• Burned out MIL bulb
Mil On Condition •-

cardiagn.com
Diagnostic Circuit Diagram

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 385 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Terminal and Connector Inspection

■ Control Circuit Inspection
1. Ignition "OFF"
2. Disconnect PCM connector
3. Ignition "ON" & Engine "OFF"
4. Using a suitable wire, jumper the terminal 92 of the PCM harness connector to chassis ground.
5. Is MIL bulb illuminated?

▶ Go to next step as below

▶ Remove instrument cluster and inspect MIL bulb. If it is burned out, replace bulb. If bulb is okay, locate
source of open between bulb and Meter Fuse. Repair as necessary and go to "Verification of Vehicle
Repair" procedure

6. Remove wire from PCM harness connector

7. Does MIL bulb go out?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure
▶ Check for source of short to GND between bulb and PCM. Repair as necessary and go to "Verification
of Vehicle Repair" procedure

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 386 of 417

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P0700 Transmission Control System (MIL Request)
General Description
The TCM can request activation of the MIL lamp Via a communication line to the PCM. This is only a request from TCM to PCM
to turn the MIL on. The fault code is stored in the TCM. Select Transaxle system on the Scantool and monitor DTC related
automatic transaxle system.
DO ALL REPAIRS associated malfunction with A/T.

cardiagn.com
DTC Detecting Condition
Item Detecting Condition Possible Cause
DTC Strategy • TCU request via CAN

Enable Conditions •-

Threshold Value • Failure from TCU • Transaxle system

Diagnostic Time •-

Mil On Condition • Immediate

Monitor DTC Status

1. This is only a request from TCM to PCM to turn the MIL on. The fault code is stored in the TCM. The Freeze Frame Data is
stored in the PCM under the P0700 request code. Be sure to retrieve freeze frame data before clearing code P0700 from
PCM.
2. Check the transaxle system

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P1505 Idle Speed Control Actuator Signal Low of Coil
#1
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 387 of 417

General Description
The Idle Speed Control Actuator(ISCA) is installed on the intake manifold and controls the intake airflow that is bypassed around
the throttle plate to keep constant engine speed when the throttle valve is closed. The function of the ISCA valve is to maintain
idle speed according to various engine loads and conditions, and also to provide additional air during starting. The ISCA valve
consists of an opening coil, a closing coil, and a permanent magnet. Based on information from various sensors, the PCM
controls both coils by grounding their control circuits. According to the control signals from the PCM, the valve rotor rotates to
control the by pass airflow into the engine.

cardiagn.com
DTC Description
PCM sets DTC P1505 if the PCM detects that the ISCA(OPEN) control circuit is open or short to ground.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check
• Open or short to ground in
Enable Conditions • 10V < Battery voltage < 16V
harness
Threshold Value • Short to ground or line break • Poor connection or damaged
harness
Diagnostic Time • 2 sec.
• Faulty ICA valve
Mil On Condition • 2 Driving Cycles

Specification
Temperature Opening Coil(Ω) Closing Coil(Ω)
20°C(68°F) 11.1~12.7 14.6~16.2

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 388 of 417

cardiagn.com
Signal Waveform & Data

Fig 1) The above waveforms are the voltage signals generated when the ISCA operates. This ISCA is a duty type and the time
opened determines the duty amount. The left side is the waveform of the ISCA Opening coil during idle.
The right side is the waveform of the ISCA Closing coil during idle.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 389 of 417

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect ISCA valve connector
3. Measure resistance between Open control terminal and power terminal of ISCA connector(Component side).
Specification

Temperature Opening Coil(Ω)

20°C(68°F) 11.1~12.7

4. Is resistance within the specification?

▶ Go to next step as below

▶ Check ISCA for contamination, deterioration, or damage. Substitute with a known-good ISCA and check
for proper operation. If the problem is corrected, replace ISCA and then go to "Verification of Vehicle
Repair" procedure.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 390 of 417

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of ISCA harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the Specification?

▶ Go to next step as below.

▶ Check for an open or short to ground in the power supply circuit between the ISCA valve and main
relay. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Signal circuit inspection

1. Measure voltage between Open control terminal of ISCA harness connector and chassis ground.

Specification : Approx. 2~4V

2. Is voltage within the Specification?

▶ Go to next step as below.

cardiagn.com
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Thoroughly check for poor connection between PCM and component: backed out terminal, improper
mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of
Vehicle Repair" procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P1506 Idle Speed Control Actuator Signal High of Coil
#1
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 391 of 417

General Description
The Idle Speed Control Actuator(ISCA) is installed on the intake manifold and controls the intake airflow that is bypassed around
the throttle plate to keep constant engine speed when the throttle valve is closed. The function of the ISCA valve is to maintain
idle speed according to various engine loads and conditions, and also to provide additional air during starting. The ISCA valve
consists of an opening coil, a closing coil, and a permanent magnet. Based on information from various sensors, the PCM
controls both coils by grounding their control circuits. According to the control signals from the PCM, the valve rotor rotates to
control the by pass airflow into the engine.

cardiagn.com
DTC Description
PCM sets DTC P1506 if the PCM detects that the ISCA(OPEN) control circuit is short to battery.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

Enable Conditions • 10V < Battery voltage < 16V • Short to battery in harness
• Poor connection or damaged
Threshold Value • Short to battery
harness
Diagnostic Time • 2 sec. • Faulty ICA valve
Mil On Condition • 2 Driving Cycles

Specification
Temperature Opening Coil(Ω) Closing Coil(Ω)
20°C(68°F) 11.1~12.7 14.6~16.2

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 392 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 393 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect ISCA valve connector
3. Measure resistance between Open control terminal and power terminal of ISCA connector(Component side).
Specification

Temperature Opening Coil(Ω)

20°C(68°F) 11.1~12.7

4. Is resistance within the specification?

cardiagn.com
▶ Go to next step as below

▶ Check ISCA for contamination, deterioration, or damage. Substitute with a known-good ISCA and check
for proper operation. If the problem is corrected, replace ISCA and then go to "Verification of Vehicle
Repair" procedure

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of ISCA harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the Specification?

▶ Go to next step as below

▶ Check for an open or short to ground in the power supply circuit between the ISCA valve and main
relay. Repair as necessary and go to "Verification of Vehicle Repair" procedure

Signal circuit inspection

1. Measure voltage between Close control terminal of ISCA harness connector and chassis ground.

Specification : Approx. 1~2V

2. Is voltage within the Specification?

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 394 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Thoroughly check for poor connection between PCM and component: backed out terminal, improper
mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of
Vehicle Repair" procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P1507 Idle Speed Control Actuator Signal Low of Coil

cardiagn.com
#2
Component Location

General Description
The Idle Speed Control Actuator(ISCA) is installed on the intake manifold and controls the intake airflow that is bypassed around
the throttle plate to keep constant engine speed when the throttle valve is closed. The function of the ISCA valve is to maintain
idle speed according to various engine loads and conditions, and also to provide additional air during starting. The ISCA valve
consists of an opening coil, a closing coil, and a permanent magnet. Based on information from various sensors, the PCM
controls both coils by grounding their control circuits. According to the control signals from the PCM, the valve rotor rotates to
control the by pass airflow into the engine.

DTC Description
PCM sets DTC P1507 if the PCM detects that the ISCAV(CLOSE) control line is open or short to ground.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check
• Open or short to ground in
Enable Conditions • 20% < PWM output < 80%
harness
Threshold Value • Short to ground or line break • Poor connection or damaged
harness
Diagnostic Time • 2 sec.
• Faulty ICA valve
Mil On Condition • 2 Driving Cycles

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 395 of 417

Specification
Temperature Opening Coil(Ω) Closing Coil(Ω)
20°C(68°F) 11.1~12.7 14.6~16.2

Diagnostic Circuit Diagram

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 396 of 417

5. Is parameter displayed "History(Not Present) fault"?

cardiagn.com
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect ISCA valve connector
3. Measure resistance between Close control terminal and power terminal of ISCA connector(Component side).
Specification

Temperature Opening Coil(Ω)

20°C(68°F) 14.6~16.2

4. Is resistance within the specification?

▶ Go to next step as below.

▶ Check ISCA for contamination, deterioration, or damage. Substitute with a known-good ISCA and check
for proper operation. If the problem is corrected, replace ISCA and then go to "Verification of Vehicle
Repair" procedure.

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of ISCA harness connector and chassis ground.

Specification : Approx. B+

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 397 of 417

3. Is voltage within the Specification?

▶ Go to next step as below

▶ Check for an open or short to ground in the power supply circuit between the ISCA valve and main
relay. Repair as necessary and go to "Verification of Vehicle Repair" procedure

Signal circuit inspection

1. Measure voltage between Close control terminal of ISCA harness connector and chassis ground.

Specification : Approx. 1~2V

2. Is voltage within the Specification?

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

cardiagn.com
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Thoroughly check for poor connection between PCM and component: backed out terminal, improper
mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of
Vehicle Repair" procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > P1508 Idle Speed Control Actuator Signal High of Coil
#2
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 398 of 417

General Description
The Idle Speed Control Actuator(ISCA) is installed on the intake manifold and controls the intake airflow that is bypassed around
the throttle plate to keep constant engine speed when the throttle valve is closed. The function of the ISCA valve is to maintain
idle speed according to various engine loads and conditions, and also to provide additional air during starting. The ISCA valve
consists of an opening coil, a closing coil, and a permanent magnet. Based on information from various sensors, the PCM
controls both coils by grounding their control circuits. According to the control signals from the PCM, the valve rotor rotates to
control the by pass airflow into the engine.

cardiagn.com
DTC Description
PCM sets DTC P1508 if the PCM detects that the ISCA(CLOSE) control circuit is short to battery.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Electrical check

• 10V < Battery voltage < 16V

Enable Conditions
• 20% < PWM output < 80% • Short to battery in harness
Threshold Value • Short to battery • Poor connection or damaged
harness
Diagnostic Time • 2 sec. • Faulty ICA valve
Fail Safe • ECM controls idle speed with predetermined value

Mil On Condition • 2 Driving Cycles

Specification
Temperature Opening Coil(Ω) Closing Coil(Ω)
20°C(68°F) 11.1~12.7 14.6~16.2

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 399 of 417

cardiagn.com
Monitor DTC Status
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

5. Is parameter displayed "History(Not Present) fault"?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 400 of 417

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Disconnect ISCA valve connector
3. Measure resistance between Close control terminal and power terminal of ISCA connector(Component side).
Specification

Temperature Opening Coil(Ω)

20°C(68°F) 14.6~16.2

4. Is resistance within the specification?

cardiagn.com
▶ Go to next step as below

▶ Check ISCA for contamination, deterioration, or damage. Substitute with a known-good ISCA and check
for proper operation. If the problem is corrected, replace ISCA and then go to "Verification of Vehicle
Repair" procedure

Power Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between power terminal of ISCA harness connector and chassis ground.

Specification : Approx. B+

3. Is voltage within the Specification?

▶ Go to next step as below

▶ Check for an open or short to ground in the power supply circuit between the ISCA valve and main
relay. Repair as necessary and go to "Verification of Vehicle Repair" procedure

Signal circuit inspection

1. Measure voltage between Close control terminal of ISCA harness connector and chassis ground.

Specification : Approx. 1~2V

2. Is voltage within the Specification?

▶ Go to next step as below

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 401 of 417

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Thoroughly check for poor connection between PCM and component: backed out terminal, improper
mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of
Vehicle Repair" procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > U0001 High Speed CAN Communication Bus off

cardiagn.com
General Description
A communication line exists between the Engine Control Module(PCM) and the Transaxle Control Module(TCM). The
communication is through a Control Area Network(CAN). Without CAN communication, an independent pin and wiring is needed
to receive a sensor information from a PCM. The more information to be communicated, the more wirings is required. In case of
CAN communication type, all the information need to be communicated among control modules such as PCM and ABS control
module use CAN lines.

DTC Description
The PCM determines CAN communication error and sets DTC U0001 if communication with other control devices (e.g. ABS) via
CAN is impossible or PCM detects that communication time via CAN exceeds threshold value.

DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy • Check CAN message transfer status

• Battery voltage >10V

Enable Conditions • Engine speed >32rpm • Open or short in CAN line
• Delay time >0.5 sec. • Poor connection or damaged
harness
Threshold Value •-
• Faulty PCM
Diagnostic Time • 20 wrong messages received by PCM

Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 402 of 417

cardiagn.com
Signal Waveform & Data

Fig 1) Normal waveform with ignition ON

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 403 of 417

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Check CAN communication line for open

1. Ignition "OFF"
2. Disconnect PCM harness connector
3. Measure resistance between High signal terminal and Low signal terminal of PCM harness connector.

Specification : Approx. 110~130Ω

4. Is resistance within the specification?

▶ Go to next step as below

▶ Check for open in wiring related to the CAN communication(PCM, EPS, MTS and vertical resistor at the
junction box). Repair as necessary and then go to "Verification of Vehicle Repair" procedure

Vertical Resistor Resistance : Approx. 110~130Ω

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 404 of 417

Check CAN communication line for short to ground

1. Measure resistance between High signal terminal of PCM harness connector and chassis ground.
2. Measure resistance between Low signal terminal of PCM harness connector and chassis ground

Specification : Infinite(above 10kΩ)

3. Is resistance within the specification?

▶ Go to next step as below.

▶ Repair CAN communication line for a short to ground. And then go to "Verification of Vehicle Repair"
procedure.

Check CAN communication line for short to battery

1. Disconnect the connectors related to the CAN communication
2. Ignition "ON" & Engine "OFF"
3. Measure voltage between High signal terminal of PCM harness connector and chassis ground.
4. Measure voltage between Low signal terminal of PCM harness connector and chassis ground.

Specification : Approx. 0V

cardiagn.com
5. Is voltage within the specification?

▶ Go to next step as below.

▶ Repair CAN communication line for a short to battery. And then go to "Verification of Vehicle Repair"
procedure.

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to next step as below

Component Inspection
1. Ignition "OFF"
2. Measure resistance between High signal terminal and Low signal terminal of PCM connector(PCM side).

Specification : Approx. 110~130Ω

3. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure
▶ Check PCM for contamination, deterioration, or damage. Substitute with a known-good PCM and check
for proper operation. If the problem is corrected, replace PCM and then go to "Verification of Vehicle
Repair" procedure.

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 405 of 417

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.

2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

Fuel System > Engine Control System > U0101 Lost Communication With TCM
General Description
A communication line exists between the Engine Control Module(PCM) and the Transaxle Control Module(TCM). The
communication is through a Control Area Network(CAN). Without CAN communication, an independent pin and wiring is needed
to receive a sensor information from a PCM. The more information to be communicated, the more wirings is required. In case of
CAN communication type, all the information need to be communicated among control modules such as PCM and ABS control
module use CAN lines.

DTC Description
The PCM determines CAN communication error and sets DTC U0101 if no message received from TCM

cardiagn.com
DTC Detecting Condition
Item Detecting Condition Possible Cause
DTC Strategy • No Message coming from TCU

• Battery voltage >10V

Enable Conditions • Engine speed >32rpm
• Poor connection or damaged
• Delay time >0.5 sec. harness
Threshold Value • Time exceeded with no Message > 1 sec. • Faulty PCM

Diagnostic Time • 1 sec.

Mil On Condition • 2 Driving Cycles

Diagnostic Circuit Diagram

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 406 of 417

cardiagn.com
Signal Waveform & Data

Fig 1) Normal waveform with ignition ON

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 407 of 417

Monitor DTC Status

1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame
data or enable conditions.
4. Read "DTC Status" parameter.

cardiagn.com
5. Is parameter displayed "History(Not Present) fault"?

- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

▶ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and
PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
▶ Go to next step as below.

Component Inspection
1. Ignition "OFF"
2. Measure resistance between High signal terminal and Low signal terminal of PCM connector(PCM side).

Specification : Approx. 110~130Ω

3. Is resistance within the specification?

▶ Check for poor connection between PCM and component: backed out terminal, improper mating, broken
locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair"
procedure
▶ Check PCM for contamination, deterioration, or damage. Substitute with a known-good PCM and check
for proper operation. If the problem is corrected, replace PCM and then go to "Verification of Vehicle
Repair" procedure.

Terminal and Connector Inspection

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 408 of 417

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Check for continuity in wiring related to the CAN communication line(PCM, EPS, MTS and vertical
resistor at the junction box.). Repair as necessary and then go to "Verification of Vehicle Repair"
procedure

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted
in the freeze frame data or enable conditions .
3. Read "DTC Status" parameter .
4. Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC

▶ Go to the applicable troubleshooting procedure.

cardiagn.com
Fuel System > Fuel Delivery System > Components and Components Location
Component Location

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 409 of 417

cardiagn.com
1. Fuel Tank 8. Ventilation Hose
2. Fuel Pump 9. Canister
3. Fuel Filter (Included Fuel Pump) 10. Fuel Tank Pressure Sensor (FTPS)
4. Fuel Pressure Regulator 11. Canister Close Valve (CCV)
5. Fuel Pump Plate Cover 12. Fuel Level Sensor (FLS)
6. Fuel Filler Hose 13. Fuel Tank Air Filter
7. Leveling Hose 14. Separator

Fuel System > Fuel Delivery System > Repair procedures

Fuel Pressure Test

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 410 of 417

cardiagn.com

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 411 of 417

cardiagn.com

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 412 of 417

cardiagn.com
Fuel System > Fuel Delivery System > Fuel Tank > Repair procedures
Removal
1. Preparation
(1) Remove the rear seat cushion (Refer to "Seat" in BD group).
(2) Open the service cover (A).

(3) Disconnect the fuel pump connector (A).

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 413 of 417

(4) Start the engine and wait until fuel in fuel line is exhausted.
(5) After engine stalls, turn the ignition switch to OFF position.

2. Disconnect the fuel feed quick-connector (A), the vapor vacuum tube quick-connector (B), and the canister close valve
connector (C).

cardiagn.com
3. Lift the vehicle and support the fuel tank with a jack.
4. Disconnect the fuel filler hose (A), the leveling hose (B) and the vapor hose (C).

5. Unscrew the fuel tank band mounting nuts (A) and remove the fuel tank (B).

Installation
Installation is reverse of removal.

Fuel tank band installation nut:

39.2 ~ 53.9 N.m (4.0 ~ 5.5 kgf.m, 28.9 ~ 39.8 lb-ft)

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 414 of 417

Fuel System > Fuel Delivery System > Fuel Pump > Repair procedures
Removal
1. Preparation
(1) Remove the rear seat cushion (Refer to "Seat" in BD group).
(2) Open the service cover (A).

(3) Disconnect the fuel pump connector (A).

cardiagn.com
(4) Start the engine and wait until fuel in fuel line is exhausted.
(5) After engine stalls, turn the ignition switch to OFF position.

2. Disconnect the fuel feed tube quick-connector (A), the vapor tube quick-connector (B), and the canister close valve connector
(C).

3. Remove the rubber cover (D).

4. Remove the fuel pump plate cover (A) with the special service tool (SST No.: 09310-2B200), and then remove the fuel pump
assembly

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 415 of 417

cardiagn.com
Installation
Installation is reverse of removal.

Fuel Pump Plate Cover Tightening :

78.5 ~ 98.1 N.m (8.0 ~ 10.0 kgf.m, 57.9 ~ 72.4lb-ft)

When installing the fuel pump module, be careful not to get the seal-ring entangled.

Fuel System > Fuel Delivery System > Fuel Filter > Repair procedures
Replacement
1. Remove the fuel pump (Refer to “Fuel Pump” in this group).
2. Disconnect the electric pump & sender wiring connector (A) and remove the regulator cap (B).

3. Disconnect the electric pump wiring connector (A) from the pump.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 416 of 417

4. Disconnect the feed tube connector (A).

cardiagn.com
5. Remove the cushion pipe fixing clip (B) after pressing the head assembly (C).
6. Separate the head assembly (C) from the fuel pump & filter assembly after disengaging the three fixing hooks (D).
7. Separate the fuel filter (A) from the fuel pump assembly (B) after disengaging the three fixing hooks (C).

Fuel System > Fuel Delivery System > Filler-Neck Assembly > Repair procedures
Removal
1. Disconnect the fuel filler hose (A), the leveling hose (B) and the ventilation hose (C).

2. Open the fuel filler door and unfasten the filler-neck assembly mounting screws (A).

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011
 Page 417 of 417

3. Remove the rear-LH wheel, tire, and the inner wheel house.
4. Remove the bracket mounting bolt (A) and remove the filler-neck assembly.

cardiagn.com
Installation
1. Installation is reverse of removal.

http://www.hmaservice.com/viewer/toc_print.asp?vehicletype=Passenger&mfrcode=H... 3/04/2011