2011 INFINITI QX56 service

P1089, P1092 VVEL CONTROL SHAFT POSITION SENSOR
EC-389
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
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Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace.
8.REPLACE VVEL CONTROL MODULE
1. Replace VVEL control module.
2. Perform additional service when replacing VVEL control module. Refer to EC-144, "
Work Procedure".
>> GO TO 9.
9.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure. See EC-387, "
DTC Logic".
Is the DTC P1089 or P1092 displayed again?
YES >> GO TO 10.
NO >> INSPECTION END
10.REPLACE VVEL ACTUATOR LADDER ASSEMBLY
Replace VVEL actuator ladder assembly. Refer to EM-75, "
Removal and Installation".
>> INSPECTION END
Revision: 2010 May2011 QX56

P1090, P1093 VVEL ACTUATOR MOTOREC-391
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
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4. Also check harness for short to ground and power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
 Harness for open or short between VVEL actuat or motor assembly and VVEL control module
 Loose or poor connection for each connector and harness
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK VVEL ACTUATOR MOTOR ASSEMBLY
Refer to EC-392, "
Component Inspection (VVEL ACTUATOR MOTOR ASSEMBLY)".
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.REPLACE VVEL ACTUATOR MOTOR ASSEMBLY
Replace VVEL actuator motor assembly. Refer to EM-75, "
Removal and Installation".
>> INSPECTION END
5.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace.
6.REPLACE VVEL CONTROL MODULE
1. Replace VVEL control module.
2. Perform additional service when replacing VVEL control module. Refer to EC-144, "
Work Procedure".
>> GO TO 7.
7.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure. See EC-390, "
DTC Logic".
Is the DTC P1090 or P1093 displayed again?
YES >> GO TO 8.
NO >> INSPECTION END
8.CHECK VVEL ACTUATOR HOUSING ASSEMBLY
Refer to EC-392, "
Component Inspection (VVEL ACTUATOR MOTOR ASSEMBLY)".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 9.
9.REPLACE VVEL ACTUATOR HOUSING ASSEMBLY
Replace VVEL actuator housing assembly. Refer to EM-75, "
Removal and Installation".
>> INSPECTION END
10.CHECK VVEL LADDER ASSEMBLY
Refer to EM-77, "
Inspection".
Revision: 2010 May2011 QX56

P1091 VVEL ACTUATOR MOTOR RELAYEC-395
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Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair or replace.
9.REPLACE VVEL CONTROL MODULE
1. Replace VVEL control module.
2. Perform additional service when replacing VVEL control module. Refer to EC-144, "
Work Procedure".
>> GO TO 10.
10.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure. See EC-393, "
DTC Logic".
Is the DTC P1091 displayed again?
YES >> Replace ECM. Refer to EC-535, "Removal and Installation".
NO >> INSPECTION END
Component Inspection (VVE L Actuator Motor Relay)INFOID:0000000006217902
1.CHECK VVEL ACTUATOR MOTOR RELAY
1. Turn ignition switch OFF.
2. Remove VVEL actuator motor relay.
3. Check the continuity between VVEL actuator motor relay termi- nals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace VVEL actuator motor relay.
Terminal Condition Continuity 3 and 5 12V direct current supply between
terminals 1 and 2
Existed
No current supply Not existed
JMBIA0876ZZ
Revision: 2010 May2011 QX56

P2A00, P2A03 A/F SENSOR 1EC-489
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
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4. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK A/F SENSOR 1 HEATER
Refer to EC-182, "
Component Inspection (A/F Sensor 1 Heater)".
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 10.
9.CHECK INTERMITTENT INCIDENT
Perform GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair or replace malfunctioning part.
10.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1. Refer to EX-5, "
Exploded View".
CAUTION:
 Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
 Before installing new A/F senso r, clean exhaust system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).
Will CONSULT-III be used?
YES >> GO TO 11.
NO >> GO TO 12.
11 .CONFIRM A/F ADJUSTMENT DATA
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select “A/F ADJ-B1” and “A/F ADJ-B2” in “DATA MONITOR” mode with CONSULT-III.
3. Check that “0.000” is di splayed on CONSULT-III screen.
Is
“0.000” displayed?
YES >> INSPECTION END
NO >> GO TO 12.
12.CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE
Clear the mixture ratio self-learning value. Refer to EC-152, "
Work Procedure".
Will CONSULT-III be used?
YES >> GO TO 13.
NO >> INSPECTION END
13.CONFIRM A/F ADJUSTMENT DATA
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select “A/F ADJ-B1” and “A/F ADJ-B2” in “DATA MONITOR” mode with CONSULT-III.
3. Check that “0.000” is di splayed on CONSULT-III screen.
>> INSPECTION END
DTC A/F sensor 1 ECM
Continuity
Bank Connector Terminal Connector Terminal
P2A00 1 F67 6 F11094
Existed
P2A03 2 F68 6 74
Revision: 2010 May2011 QX56

EC-530
< PERIODIC MAINTENANCE >[VK56VD]
IDLE SPEED
PERIODIC MAINTENANCE
IDLE SPEED
InspectionINFOID:0000000006218030
1.CHECK IDLE SPEED
WITH CONSULT-III
Check idle speed in “DATA MONITOR” mode with CONSULT-III.
WITH GST
Check idle speed with Service $01 of GST.
>> INSPECTION END
Revision: 2010 May2011 QX56

EC-532
< PERIODIC MAINTENANCE >[VK56VD]
EVAP LEAK CHECK
EVAP LEAK CHECK
InspectionINFOID:0000000006267340
CAUTION:
 Do not use compressed air or a high pressure pump.
 Do not exceed 4.12 kPa (0.042 kg/cm
2, 0.6 psi) of pressure in EVAP system.
NOTE:
 Do not start engine.
 Improper installation of EVAP service port adapter (com mercial service tool) to the EVAP service port may
cause a leak.
WITH CONSULT-III
1. To locate the EVAP leak, install EVAP service port adapter (com- mercial service tool) and pressure pump to EVAP service port.
2. Turn ignition switch ON.
3. Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT-III.
4. Touch “START”. A bar graph (Pressure indicating display) will appear on the screen.
5. Apply positive pressure to the EVAP system until the pressure indicator reaches the middle of the bar graph.
6. Remove EVAP service port adapter (commercial service tool) and hose with pressure pump.
7. Locate the leak using a leak detector (commercial service tool). Refer to EC-45, "
EVAPORATIVE EMISSION SYSTEM : System
Diagram".
WITHOUT CONSULT-III
1. To locate the EVAP leak, install EVAP service port adapter (com-
mercial service tool) and pressure pump to EVAP service port.
2. Apply battery voltage between the terminals of EVAP canister vent control valve to ma ke a closed EVAP system.
3. To locate the leak, deliver positive pressure to the EVAP system until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to
0.028 kg/cm
2, 0.2 to 0.4 psi).
4. Remove EVAP service port adapter (commercial service tool) and hose with pressure pump.
SEF462UA
SEF200U
SEF462UA
Revision: 2010 May2011 QX56

EVAP LEAK CHECKEC-533
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5. Locate the leak using a leak detector (commercial service tool).
Refer to EC-45, "
EVAPORATIVE EMISSION SYSTEM : System
Diagram".
SEF200U
Revision: 2010 May2011 QX56

ECM
EC-535
< REMOVAL AND INSTALLATION > [VK56VD]
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REMOVAL AND INSTALLATION
ECM
Removal and InstallationINFOID:0000000006218034
REMOVAL
1. Remove the battery and battery tray. Refer to
PG-164, "Removal and Installation".
2. Disconnect ECM harness connectors (1) as shown in the figure.
3. Remove ECM bracket bolts (A).
4. Separate ECM (2) and ECM bracket (3).
INSTALLATION
Install in the reverse order of removal.
CAUTION:
Must be perform additi onal service when replacing ECM. Refer to EC-143, "
Work Procedure".
JSBIA0307ZZ
Revision: 2010 May2011 QX56