Infiniti QX56 (Z62). Manual — part 602
EC-386
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P1087, P1088 VVEL SYSTEM
P1087, P1088 VVEL SYSTEM
DTC Logic
INFOID:0000000006217892
DTC DETECTION LOGIC
NOTE:
If DTC P1087 or P1088 is displayed with DTC P1090 or P1093.
Perform the trouble diagnosis for DTC P1090 or P1093. Refer to
Diagnosis Procedure
INFOID:0000000006217893
If DTC P1087 or P1088 is displayed with DTC P1090 or P1093.
Perform the trouble diagnosis for DTC P1090 or P1093. Refer to
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)]
P1089, P1092 VVEL CONTROL SHAFT POSITION SENSOR
EC-387
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P1089, P1092 VVEL CONTROL SHAFT POSITION SENSOR
DTC Logic
INFOID:0000000006217894
DTC DETECTION LOGIC
NOTE:
If DTC P1089 or P1092 is displayed with DTC P1608, first perform the trouble diagnosis for DTC P1608.
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 10 V or more at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006217895
1.
VVEL CONTROL SHAFT POSITION SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect VVEL control shaft position sensor harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between VVEL control shaft position sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1089
VVEL POS SEN/CIRC-B1
[VVEL control shaft position sen-
sor (bank 1) circuit]
• An excessively low voltage from the sensor
is sent to VVEL control module.
• An excessively high voltage from the sensor
is sent to VVEL control module.
• Rationally incorrect voltage is sent to VVEL
control module compared with the signals
from VVEL control shaft position sensor 1
and VVEL control shaft position sensor 2.
• Harness or connectors
(VVEL control shaft position sen-
sor circuit is open or shorted.)
• VVEL control shaft position sen-
sor
• VVEL control module
P1092
VVEL POS SEN/CIRC-B2
[VVEL control shaft position sen-
sor (bank 2) circuit]
DTC No.
VVEL control shaft position sensor
Ground
Voltage (V)
Bank
Connector
Terminal
P1089
1
F72
3
Ground
Approx. 5
6
P1092
2
F70
3
6
EC-388
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P1089, P1092 VVEL CONTROL SHAFT POSITION SENSOR
• Harness for open or short between VVEL control shaft position sensor 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 CONTROL SHAFT POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect VVEL control module harness connector.
3.
Check the continuity between VVEL control shaft position sensor harness connector and VVEL control
module harness connector.
4.
Also check harness for short to ground and power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between VVEL control shaft position sensor 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.
5.
VVEL CONTROL SHAFT POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between VVEL control shaft position sensor harness connector and VVEL control
module harness connector.
2.
Also check harness for short to ground and power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between VVEL control shaft position sensor 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.
7.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
DTC No.
VVEL control shaft position sensor
VVEL control module
Continuity
Bank
Connector
Terminal
Connector
Terminal
P1089
1
F72
2
F56
6
Existed
5
19
P1092
2
F70
2
4
5
17
DTC No.
VVEL control shaft position sensor
VVEL control module
Continuity
Bank
Connector
Terminal
Connector
Terminal
P1089
1
F72
1
F56
3
Existed
4
16
P1092
2
F70
1
5
4
18
P1089, P1092 VVEL CONTROL SHAFT POSITION SENSOR
EC-389
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
.
>> GO TO 9.
9.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON.
2.
Erase DTC.
3.
Perform DTC Confirmation Procedure.
See
.
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
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