Infiniti FX35, FX50 (S51). Manual - part 552

AWD WARNING LAMP DOES NOT TURN OFF

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AWD WARNING LAMP DOES NOT TURN OFF

Description

INFOID:0000000005249082

AWD warning lamp does not turn OFF several seconds after the engine started.

Diagnosis Procedure

INFOID:0000000005249083

1.

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 2.

2.

CHECK AWD WARNING LAMP

Perform the trouble diagnosis of the AWD warning lamp. Refer to 

DLN-30, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the error-detected parts.

3.

CHECK AWD CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

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

DLN-27, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> Check each harness connector pin terminal for malfunction or disconnection.

NO

>> Repair or replace the error-detected parts.

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HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS

HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS

Description

INFOID:0000000005249084

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:0000000005249085

1.

PERFORM ECM SELF-DIAGNOSIS

With CONSULT-III

Perform self-diagnosis for “ENGINE”.

Is any DTC detected?

YES

>> Check the DTC.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “U1000” detected?

YES

>> CAN specification chart. Refer to 

LAN-20, "Trouble Diagnosis Flow Chart"

.

NO

>> GO TO 3.

3.

CHECK TRANSFER FLUID TEMPERATURE SENSOR 

Perform the trouble diagnosis of the transfer fluid temperature sensor. Refer to 

DLN-22, "Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace the error-detected parts.

4.

CHECK AWD SOLENOID

Perform the trouble diagnosis of the AWD solenoid. Refer to 

DLN-16, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace the error-detected parts.

5.

CHECK ELECTRIC CONTROLLED COUPLING

1.

Turn the ignition switch OFF.

2.

Set the transmission to neutral. Release the parking brake.

3.

Lift up the vehicle.

4.

Rotate the rear propeller shaft.

5.

Hold the front propeller shaft lightly.

Does the front propeller shaft rotate?

YES

>> Replace electric controlled coupling for mechanical malfunction (clutch sticking etc.). Refer to

DLN-88, "VQ35HR : Exploded View"

 (VQ35HR), 

DLN-92, "VK50VE : Exploded View"

 (VK50VE).

NO

>> Check each harness connector pin terminal for disconnection.

VEHICLE DOES NOT ENTER AWD MODE

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VEHICLE DOES NOT ENTER AWD MODE

Description

INFOID:0000000005249086

Vehicle does not enter 4-wheel drive mode even though AWD warning lamp turned to OFF.

Diagnosis Procedure

INFOID:0000000005249087

1.

CHECK AWD WARNING LAMP

Turn the ignition switch ON.

Does AWD warning lamp turn ON?

YES

>> GO TO 2.

NO

>> Proceed to diagnosis procedure. Refer to 

DLN-30, "Diagnosis Procedure"

.

2.

CHECK PARKING BRAKE SWITCH SIGNAL

With CONSULT-III

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Proceed to diagnosis procedure. Refer to 

BRC-99, "Diagnosis Procedure"

.

3.

CRUISE TEST

Drive the vehicle for a period of time.

Does any symptom occur?

YES

>> Replace electric controlled coupling for mechanical malfunction (mechanical engagement of

clutch is not possible). Refer to 

DLN-88, "VQ35HR : Exploded View"

 (VQ35HR), 

DLN-92,

"VK50VE : Exploded View"

 (VK50VE).

NO

>> Check each harness connector pin terminal for disconnection.

Monitor Item

Condition

Status

P BRAKE SW

When the parking brake pedal is operation.

ON

When the parking brake pedal is not operation.

OFF

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AWD WARNING LAMP BLINKS QUICKLY

AWD WARNING LAMP BLINKS QUICKLY

Description

INFOID:0000000005249088

While driving, AWD warning lamp blinks 2 times in 1 second and it turns OFF after 1 minute.
• This symptom protects drivetrain parts when a heavy load is applied to the electric controlled coupling and

multiple disc clutch temperature increases. Also, optional distribution of torque sometimes becomes rigid
before lamp blinks quickly. Both cases are not malfunction.

• When this symptom occurs, stop vehicle and allow it to idle for some times. Blinking will stop and system will

be restored.