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Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1208 (Transfer Case) >> Trouble Diagnosis For Symptoms >> 4WD Warning Lamp Flashes Rapidly >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK TIRE 

    Check the following.

    • Tire pressure
    • Wear condition
    • Longitudinal tire size (There is no difference between longitudinal tires.)

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Repair or replace damaged parts.
  2. CHECK 4WD WARNING LAMP 

    Stop the vehicle and allow it to idle for a short period of time.

    Does flashing stop? 

    1. YES: Inspection End.
    2. NO: GO TO 3.
  3. CHECK TRANSFER FLUID TEMPERATURE 

    Perform trouble diagnosis for transfer fluid temperature system. Refer to "TRANSFER FLUID TEMPERATURE "

    OK or NG 

    1. OK: GO TO 4.
    2. NG: Repair or replace damaged parts.
  4. SYMPTOM CHECK 

    Check again.

    OK or NG 

    1. OK: Inspection End.
    2. NG: GO TO 5.
  5. CHECK TRANSFER CONTROL UNIT 

    Check transfer control unit input/output signal. Refer to "TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES ".

    OK or NG 

    1. OK: Inspection End.
    2. NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
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