Infiniti QX56 (Z62). Manual — part 549
EC-174
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
U0113, U1003 CAN COMM CIRCUIT
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace.
4.
REPLACE VVEL CONTROL MODULE
Replace VVEL control module. Refer to
EC-536, "Removal and Installation"
.
>> GO TO 5.
5.
PERFORM DTC CONFIRMATION PROCEDURE
WITH CONSULT-III
1.
Reconnect all harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Select “SELF DIAGNOSTIC RESULT” mode with CONSULT-III.
4.
Touch “ERASE”.
5.
Perform DTC Confirmation Procedure.
See
WITH GST
1.
Reconnect all harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Select Service $04 with GST.
4.
Perform DTC Confirmation Procedure.
See
Is the DTC U0113 or U1003 displayed again?
YES
>> GO TO 6.
NO
>> INSPECTION END
6.
REPLACE ECM
Replace ECM. Refer to
EC-535, "Removal and Installation"
>> INSPECTION END
U1024 CAN COMM CIRCUIT
EC-175
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
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EC
N
P
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U1024 CAN COMM CIRCUIT
DTC Logic
INFOID:0000000006217770
DTC DETECTION LOGIC
NOTE:
If DTC U1024 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607.
Refer to
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 10 V or more at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 3 seconds.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006217771
1.
CHECK VVEL CAN COMMUNICATION CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect VVEL control module harness connector.
4.
Check the continuity between ECM harness connector and VVEL control module harness connector.
5.
Also check harness for short to ground and short to 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 ECM 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.
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
U1024
VVEL CAN COMM CIRCUIT
(VVEL CAN communication)
• When VVEL control module cannot transmitting
or receiving CAN communication signal with
ECM for 2 seconds or more.
• When detecting error during the initial diagnosis
of CAN controller of VVEL control module.
• Harness or connectors
(CAN communication line is
open or shorted)
• ECM
• VVEL control module
ECM
VVEL control module
Continuity
Connector
Terminal
Connector
Terminal
E80
161
F56
24
Existed
166
11
EC-176
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
U1024 CAN COMM CIRCUIT
3.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace.
4.
REPLACE VVEL CONTROL MODULE
1.
Replace VVEL control module.
2.
Perform additional service when replacing VVEL control module. Refer to
.
>> GO TO 5.
5.
PERFORM DTC CONFIRMATION PROCEDURE
WITH CONSULT-III
1.
Reconnect all harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Select “SELF DIAGNOSTIC RESULT” mode with CONSULT-III.
4.
Touch “ERASE”.
5.
Perform DTC Confirmation Procedure.
See
WITH GST
1.
Reconnect all harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Select Service $04 with GST.
4.
Perform DTC Confirmation Procedure.
See
Is the DTC U1024 displayed again?
YES
>> GO TO 6.
NO >> INSPECTION
END
6.
REPLACE ECM
1.
Replace ECM.
2.
Perform additional service when replacing ECM. Refer to
>> INSPECTION END
P0011, P0021 IVT CONTROL
EC-177
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
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P0011, P0021 IVT CONTROL
DTC Logic
INFOID:0000000006217772
DTC DETECTION LOGIC
NOTE:
If DTC P0011 or P0021 is displayed with DTC P0075 or P0081, first perform the trouble diagnosis for
DTC P0075, P0081. Refer to
.
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-I
WITH CONSULT-III
1.
Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
2.
Start engine and warm it up to the normal operating temperature.
3.
Maintain the following conditions for at least 6 consecutive seconds.
Hold the accelerator pedal as steady as possible.
4.
Let engine idle for 25 seconds.
5.
Check 1st trip DTC.
WITH GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-II
WITH CONSULT-III
1.
Select “DATA MONITOR” mode with CONSULT-III.
2.
Maintain the following conditions for at least 20 consecutive seconds.
DTC No.
Trouble diagnosis
(Trouble diagnosis con-
tent)
Detecting condition
Possible cause
P0011
INT/V TIM CONT-B1
[Intake valve timing control
performance (bank 1)]
There is a gap between angle of target
and phase-control angle degree.
• Crankshaft position sensor
• Camshaft position sensor
• Intake valve timing control solenoid valve
• Accumulation of debris to the signal pick-up
portion of the camshaft
• Timing chain installation
• Foreign matter caught in the oil groove for in-
take valve timing control
P0021
INT/V TIM CONT-B2
[Intake valve timing control
performance (bank 2)]
ENG SPEED
Less than 2,000 rpm (A constant rotation is maintained.)
COOLAN TEMP/S
More than 70
°
C (158
°
F)
Selector lever
P or N position
ENG SPEED
1,500 - 3,175 rpm (A constant rotation is maintained.)
COOLAN TEMP/S
More than 70
°
C (158
°
F)
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