Infiniti QX56 (Z62). Manual — part 463
DLN-52
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ATX90A]
P1807 OUT PUT SHAFT SPEED SENSOR
P1807 OUT PUT SHAFT SPEED SENSOR
DTC Logic
INFOID:0000000006222246
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Start the engine and drive at 30 km/h (19 MPH) or more for approximately 1minute.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P1807” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006222247
1.
PERFORM TCM SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “TRANSMISSION”.
Is any DTCs detected?
YES
>> Check the DTC.
NO
>> GO TO 2.
2.
ERASE SELF-DIAGNOSTIC RESULT
With CONSULT-III
1.
Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2.
Start the engine and drive vehicle at 30 km/h (19 MPH) or more.
3.
Check that A/T CHECK indictor lamp turns OFF.
Does A/T CHECK indicator lamp turn OFF?
YES
>> GO TO 3.
NO
>> Refer to
3.
CHECK TERMINALS AND HARNESS CONNECTORS
Check transfer control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES
>> After turning the ignition switch OFF, perform DTC confirmation procedure again. When DTC
"P1807" is detected, Replace transfer control unit. Refer to
DLN-107, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
DTC
Display item
Malfunction detected condition
Possible cause
P1807
VHCL SPEED SEN-AT
• Malfunction is detected in output
speed signal that is output from TCM
through CAN communication.
• Improper signal is input while driving.
• Harness or connector (CAN communi-
cation line)
• TCM
- Internal malfunction of TCM
- Output speed signal error
P1808 WHEEL SPEED SENSOR
DLN-53
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ATX90A]
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P1808 WHEEL SPEED SENSOR
DTC Logic
INFOID:0000000006222248
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Start the engine and drive at 30 km/h (19 MPH) or more for approximately 1minute.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P1808” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006222249
1.
PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “ABS”.
Is any DTCs detected?
YES
>> Check the DTCs.
NO
>> GO TO 2.
2.
ERASE SELF-DIAGNOSTIC RESULT
With CONSULT-III
1.
Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2.
Start the engine and drive vehicle at 30 km/h (19 MPH) or more.
3.
Check that ABS warning lamp turns OFF.
Does ABS warning lamp turn OFF?
YES
>> GO TO 3.
NO
>> Refer to
BRC-122, "Diagnosis Procedure"
3.
CHECK TERMINALS AND HARNESS CONNECTORS
Check transfer control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES
>> After turning the ignition switch OFF, perform DTC confirmation procedure again. When DTC
"P1808" is detected, Replace transfer control unit. Refer to
DLN-107, "Removal and Installation"
.
NO
>> Repair or replace error-detected parts.
DTC
Display item
Malfunction detected condition
Possible cause
P1808
VHCL SPEED SEN-ABS
• Malfunction is detected in vehicle
speed signal that is output from ABS
actuator and electric unit (control unit)
through CAN communication.
• Improper signal is input while driving.
• Harness or connector (CAN communi-
cation line)
• Malfunction of ABS actuator and elec-
tric unit (control unit)
- Malfunction of ABS actuator and elec-
tric unit (control unit) circuit error
- Vehicle speed signal error
DLN-54
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ATX90A]
P180C SENSOR POWER SUPPLY (5V)
P180C SENSOR POWER SUPPLY (5V)
Description
INFOID:0000000006222250
Supplies power (5V) to transfer lock position sensor and transfer rotary position sensor.
DTC Logic
INFOID:0000000006222251
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P180C” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006222252
1.
CHECK TRANSFER LOCK POSITION SENSOR POWER SUPPLY (1)
1.
Turn the ignition switch OFF.
2.
Disconnect transfer lock position sensor harness connector and transfer rotary position sensor harness
connector.
3.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
4.
Check the voltage between transfer lock position sensor harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK TRANSFER LOCK POSITION SENSOR CIRCUIT
1.
Turn the ignition switch OFF.
2.
Disconnect transfer control unit harness connector.
3.
Check the continuity between transfer control unit harness connector and transfer lock position sensor
harness connector.
DTC
Display item
Malfunction detected condition
Possible cause
P180C
SEN POWER SUPPLY (5V)
When the sensor power supply (5V) volt-
age is lower or higher than normal.
• Malfunction of transfer lock position
sensor power supply circuit (open or
short)
• Malfunction of transfer rotary position
sensor power supply circuit (open or
short)
+
−
Voltage
Transfer lock position sensor
Connector
Terminal
F40
1
2
Approx. 5 V
P180C SENSOR POWER SUPPLY (5V)
DLN-55
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ATX90A]
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4.
Check the continuity between transfer lock position sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
3.
CHECK TRANSFER LOCK POSITION SENSOR POWER SUPPLY (2)
1.
Turn the ignition switch OFF.
2.
Connect transfer lock position sensor harness connector.
3.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
4.
Check the voltage between transfer lock position sensor harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace transfer lock position sensor. Refer to
DLN-119, "Removal and Installation"
4.
CHECK TRANSFER ROTARY POSITION SENSOR POWER SUPPLY (1)
1.
Turn the ignition switch OFF.
2.
Connect transfer control unit harness connector.
3.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
4.
Check the voltage between transfer rotary position sensor harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK TRANSFER ROTARY POSITION SENSOR CIRCUIT
1.
Turn the ignition switch OFF.
2.
Disconnect transfer control unit harness connector.
3.
Check the continuity between transfer control unit harness connector and transfer rotary position sensor
harness connector.
Transfer control unit
Transfer lock position sensor
Continuity
Connector
Terminal
Connector
Terminal
E59
17
F40
1
Existed
30
2
Transfer lock position sensor
—
Continuity
Connector
Terminal
F40
1
Ground
Not existed
+
−
Voltage
Transfer lock position sensor
Connector
Terminal
F40
1
2
Approx. 5 V
+
−
Voltage
Transfer rotary position sensor
Connector
Terminal
F41
1
2
Approx. 5 V
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