Infiniti QX56 (Z62). Manual - part 474

DLN-96

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX90A]

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace error-detected parts.

10.

CHECK 4WD SWITCH ASSEMBLY GROUND

1.

Turn the ignition switch OFF.

2.

Check the voltage between transfer control unit harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace error-detected parts.

4WD switch assembly

—

Voltage

Connector

Terminal

M54

20

Ground

Approx. 0 V

4WD WARNING LAMP

DLN-97

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX90A]

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4WD WARNING LAMP

Component Function Check

INFOID:0000000006222308

1.

CHECK 4WD WARNING LAMP FUNCTION 

1.

Turn the ignition switch OFF to ON.

2.

Check that 4WD warning lamp light up.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed diagnosis procedure. Refer to 

DLN-97, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006222309

1.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Perform the trouble diagnosis for power supply and ground circuit. Refer to 

DLN-64, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the error-detected parts.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is any DTC detected?

YES

>> Check the DTC.

NO

>> GO TO 3.

3.

CHECK 4WD WARNING LAMP SIGNAL

With CONSULT-III

1.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

2.

Check “4WD FAIL LAMP” of CONSULT-III “DATA MONITOR” for “ALL MODE AWD/4WD”.

Does the item on “DATA MONITOR” indicate “On”?

YES

>> Check combination meter. Refer to 

MWI-64, "COMBINATION METER : Diagnosis Procedure"

.

NO

>> Replace transfer control unit. Refer to 

DLN-107, "Removal and Installation"

.

DLN-98

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX90A]

4WD INDICATOR LAMP

4WD INDICATOR LAMP

Component Function Check

INFOID:0000000006222310

1.

CHECK 4WD MODE INDICATOR LAMP FUNCTION 

1.

Start the engine

CAUTION:

Never drive the vehicle.

2.

Turn the 4WD shift switch AUTO

⇒

4H

⇒

4LO

⇒

4H

⇒

AUTO.

3.

Check the 4WD shift switch position (“AUTO”, “4H” and “4L”) and the indication of the 4WD mode indica-
tor lamp mutually coincide.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to diagnosis procedure. Refer to 

DLN-98, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006222311

1.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Perform the trouble diagnosis for power supply and ground circuit. Refer to 

DLN-64, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the error-detected parts.

2.

CHECK 4WD WARNING LAMP SIGNAL

With CONSULT-III

1.

Strat the engine.

CAUTION:

Never drive the vehicle.

2.

Turn the 4WD shift switch AUTO

⇒

4H

⇒

4LO

⇒

4H

⇒

AUTO.

3.

Check “4WD MODE IND” of CONSULT-III “DATA MONITOR” for “ALL MODE AWD/4WD”.

Is the inspection result normal?

YES

>> Check combination meter. Refer to 

MWI-64, "COMBINATION METER : Diagnosis Procedure"

.

NO

>> Replace transfer control unit. Refer to 

DLN-107, "Removal and Installation"

.

Monitor item

Condition

Status

4WD MODE IND

4WD shift switch: AUTO

AUTO

4WD shift switch: 4H

4H

4WD shift switch: 4L

4L

HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS

DLN-99

< SYMPTOM DIAGNOSIS >

[TRANSFER: ATX90A]

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SYMPTOM DIAGNOSIS

HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS

Description

INFOID:0000000006222312

Heavy tight-corner braking symptom occurs when the vehicle is driven and the steering wheel is turned fully to
either side after the engine is started.
NOTE:
Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunction.

Diagnosis Procedure

INFOID:0000000006222313

1.

PERFORM ECM SELF-DIAGNOSIS

With CONSULT-III

Perform self-diagnosis for “ECM”.

Is any DTC detected?

YES

>> Check the DTC. Refer to 

EC-98, "DTC Index"

.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

DLN-29, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK TRANSFER INTERNAL FUNCTION

With CONSULT-III

1.

Remove transfer control actuator. Refer to 

DLN-114, "Removal and Installation"

.

2.

Turn the actuator shaft. Refer to 

DLN-114, "Inspection"

.

3.

Check “ROTARY POSI SEN” of CONSULT-III “DATA MONITOR” for “ALL MODE AWD/4WD”.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Transfer assembly is mechanical malfunction. Replace transfer assembly. Refer to 

DLN-121,

"Removal and Installation"

.

Monitor item

Condition

Status

ROTARY POSI SEN

Turn the actuator shaft.

Value is changing