2011 INFINITI QX56 display

P050E COLD START CONTROLEC-363
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
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Perform
EC-148, "Work Procedure".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 2.
NO >> Follow the instruction of Idle Air Volume Learning.
2.CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.
 Crushed intake air passage
 Intake air passage clogging
 Clogging of throttle body
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace malfunctioning part
3.CHECK FUEL INJECTION SYSTEM FUNCTION
Perform DTC Confirmation Procedure for DTC P0171, P0174. Refer to EC-263, "
DTC Logic".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Proceed to EC-264, "
Diagnosis Procedure" for DTC P0171, P0174.
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure. See EC-362, "
DTC Logic".
Is the 1st trip DTC P050E displayed again?
YES >> GO TO 5.
NO >> INSPECTION END
5.REPLACE ECM
Replace ECM. Refer to EC-535, "
Removal and Installation".
>> INSPECTION END
Revision: 2010 May2011 QX56

EC-364
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0524 ENGINE OIL PRESSURE
P0524 ENGINE OIL PRESSURE
DTC LogicINFOID:0000000006288342
DTC DETECTION LOGIC
NOTE:
If DTC P0524 is displayed with DTC P0075 or P0081,
perform trouble diagnosis for DTC P0075 or P0081
first. Refer to EC-193, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING-I
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confi rm that battery voltage is between 10 V and 16 V at
idle.
>> GO TO 2.
2.PRECONDITIONING-II
Check oil level and oil pressure. Refer to LU-7, "
Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Proceed to LU-7, "
Inspection".
3.PERFORM DTC CONFIRMATION PROCEDURE
WITH CONSULT-III
1. Select “DATA MONITOR” mode with CONSULT-III.
2. Maintain the following conditions for at least 20 consecutive seconds.
CAUTION:
Always drive at a safe speed.
3. Check 1st trip DTC.
WITH GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES >> Proceed to EC-365, "Diagnosis Procedure"
DTC No.Trouble diagnosis name
(Trouble diagnosis content) Detecting condition Possible cause
P0524 ENGINE OIL PRESSURE
(Engine oil pressure too low) Engine oil pressure is low because
there is a gap between angle of target
and phase-control angle.  Engine oil pressure or level too low
 Crankshaft position sensor
 Camshaft position sensor
 Intake valve timing control solenoid valve
 Accumulation of debris to the signal pick-up por-
tion of the camshaft
 Timing chain installation
 Foreign matter caught in the oil groove for intake valve timing control
ENG SPEED More than 1,700 rpm
COOLAN TEMP/S More than 70 °C (158 °F)
Selector lever 1st or 2nd position
Driving location uphill Driving vehicle uphill
(Increased engine load will help maintain the driving
conditions required for this test.)
Revision: 2010 May2011 QX56

P0603 ECM POWER SUPPLYEC-375
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
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Refer to
GI-40, "Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness or connectors.
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure. See EC-374, "
DTC Logic".
Is the 1st trip DTC P0603 displayed again?
YES >> GO TO 5.
NO >> INSPECTION END
5.REPLACE ECM
Replace ECM.
>> INSPECTION END
Revision: 2010 May2011 QX56

EC-376
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0605 ECM
P0605 ECM
DTC LogicINFOID:0000000006217875
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROC EDURE FOR MALFUNCTION A AND D
1. Turn ignition switch ON.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-376, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds, and then turn it ON.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-376, "Diagnosis Procedure".
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds, and then turn it ON.
3. Repeat step 2 for 32 times.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-376, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006217876
1.INSPECTION START
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure. See EC-376, "
DTC Logic".
Is the 1st trip DTC P0605 displayed again?
YES >> GO TO 2.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0605 Engine control module A) ECM calculation function is malfunctioning.
ECM
B) ECM EEP-ROM system is malfunctioning.
C) ECM self shut-off function is malfunctioning.
D) ECM temperature sensor is malfunctioning.
Revision: 2010 May2011 QX56

EC-378
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0607 ECM
P0607 ECM
DTC LogicINFOID:0000000006217877
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-378, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006217878
1.INSPECTION START
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure. See EC-378, "
DTC Logic".
4. Check DTC.
Is the DTC P0607 displayed again?
YES >> Replace ECM. Refer to EC-535, "Removal and Installation".
NO >> INSPECTION END
DTC No. Trouble diagnosis name
(Trouble diagnosis content) DTC detecting condition Possible cause
P0607 ECM
(CAN communication bus) When detecting error during the initial diagnosis
of CAN controller of ECM.
ECM
Revision: 2010 May2011 QX56

P0611 ECM PROTECTIONEC-379
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P0611 ECM PROTECTION
DescriptionINFOID:0000000006288344
This DTC is detected when the ECM protective functi
on is activated due to an extreme temperature increase
in ECM, resulting from severe conditions such as heavy load driving.
DTC LogicINFOID:0000000006288345
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
This DTC is displayed as protection function history. If no malfunction is detected after the diagnosis, the cus-
tomer must be informed of the activation of the protection function.
>> Proceed to EC-379, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006288346
1.INSPECTION START
1. Perform DTC confirmation procedure. Refer to EC-379, "
DTC Logic".
2. Check 1st trip DTC.
Is DTC P0605 detected?
YES >> Proceed to EC-376, "Diagnosis Procedure".
NO >> Explain the customer about the ac tivation of the protection function.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0611 ECM PROTECTION ECM overheat protection control is activated. ECM overheated
Revision: 2010 May2011 QX56

EC-380
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P062B ECM
P062B ECM
DescriptionINFOID:0000000006217879
This DTC is detected when the ECM-integrated injector dr
iver unit has a malfunction. For injector driver unit,
refer to EC-23, "
ECM".
DTC LogicINFOID:0000000006217880
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine and keep the engine speed at idle for 30 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-380, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006217881
1.CHECK FUEL INJECTOR
Perform fuel injector. Refer to EC-498, "
Component Function Check".
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace error-detected parts.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC cfirmation procedure again. Refer to EC-380, "
DTC Logic".
4. Check 1st trip DTC.
Is the DTC P062B displayed again?
YES >> Replace ECM. Refer to EC-535, "Removal and Installation".
NO >> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P062B Internal control module fuel injector
control performance Injector driver unit is malfunctioning.  Harness and connectors
(Injector circuit is open or
shorted)
 Battery power supply
 ECM (injector driver unit)
Revision: 2010 May2011 QX56

EC-386
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P1087, P1088 VVEL SYSTEM
P1087, P1088 VVEL SYSTEM
DTC LogicINFOID:0000000006217892
DTC DETECTION LOGIC
NOTE:
If DTC P1087 or P1088 is disp
layed with DTC P1090 or P1093.
Perform the trouble diagnosis for DTC P1090 or P1093. Refer to EC-390, "
DTC Logic".
Diagnosis ProcedureINFOID:0000000006217893
If DTC P1087 or P1088 is displayed with DTC P1090 or P1093.
Perform the trouble diagnosis for DTC P1090 or P1093. Refer to EC-390, "
DTC Logic".
DTC No.Trouble diagnosis name
(Trouble diagnosis content) DTC detecting condition Possible cause
P1087 VVEL SYSTEM-B1
[VVEL small event angle malfunction
(bank 1)]
The event angle of VVEL control
shaft is always small. Harness or connectors
(VVEL actuator motor assembly
circuit is open or shorted.)
 VVEL actuator motor assembly
 VVEL actuator housing assembly
 VVEL ladder assembly
 VVEL control module
P1088
VVEL SYSTEM-B2
[VVEL small event angle malfunction
(bank 2)]
Revision: 2010 May2011 QX56