2007 INFINITI QX56 Factory Service Manual

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Page 1153 of 3061

INFINITI QX56 2007 Factory Service Manual EC-70
< SERVICE INFORMATION >
ON BOARD DIAGNOSTIC (OBD) SYSTEM
<Driving Pattern A>
• The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
• The A counter will be

Page 1154 of 3061

INFINITI QX56 2007 Factory Service Manual BASIC SERVICE PROCEDURE
EC-71
< SERVICE INFORMATION >
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BASIC SERVICE PROCEDURE
Basic InspectionINFOID:0000000003531609
1.INSPECTION START
1. Check service records for an

Page 1155 of 3061

INFINITI QX56 2007 Factory Service Manual EC-72
< SERVICE INFORMATION >
BASIC SERVICE PROCEDURE
2. Rev engine (2,000 to 3,000 rpm) two or three times under no
load, then run engine at idle speed for about 1 minute.
3. Read idle speed in “DA

Page 1156 of 3061

INFINITI QX56 2007 Factory Service Manual BASIC SERVICE PROCEDURE
EC-73
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1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with

Page 1157 of 3061

INFINITI QX56 2007 Factory Service Manual EC-74
< SERVICE INFORMATION >
BASIC SERVICE PROCEDURE
13.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-78, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r

Page 1158 of 3061

INFINITI QX56 2007 Factory Service Manual BASIC SERVICE PROCEDURE
EC-75
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1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a ra

Page 1159 of 3061

INFINITI QX56 2007 Factory Service Manual EC-76
< SERVICE INFORMATION >
BASIC SERVICE PROCEDURE
2. Check ignition timing.
Method B
1. Remove ignition coil No.1.
2. Connect ignition coil No.1 and spark plug with suitable high-ten-
sion wire as

Page 1160 of 3061

INFINITI QX56 2007 Factory Service Manual BASIC SERVICE PROCEDURE
EC-77
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Procedure After Replacing ECMINFOID:0000000003531611
When replacing ECM, the following procedure must be performed

BASIC SERVICE PROCEDURE
EC-77
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Procedure After Replacing ECMINFOID:0000000003531611
When replacing ECM, the following procedure must be performed.
1. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs.
Refer to BL-117, "
ECM Re-communicating Function".
2. Perform EC-77, "
VIN Registration".
3. Perform EC-77, "
Accelerator Pedal Released Position Learning".
4. Perform EC-77, "
Throttle Valve Closed Position Learning".
5. Perform EC-78, "
Idle Air Volume Learning".
VIN RegistrationINFOID:0000000003531612
DESCRIPTION
VIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced.
NOTE:
Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).
OPERATION PROCEDURE
With CONSULT-II
1. Check the VIN of the vehicle and note it. Refer to GI-46.
2. Turn ignition switch ON and engine stopped.
3. Select “VIN REGISTRATION” in “WORK SUPPORT” mode.
4. Follow the instruction of CONSULT-II display.
Accelerator Pedal Released Position LearningINFOID:0000000003531613
DESCRIPTION
Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.
Throttle Valve Closed Position LearningINFOID:0000000003531614
DESCRIPTION
Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON.
PBIB2242E

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