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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 910 (Transfer Case) >> Symptom Diagnosis >> 4WD Warning Lamp Flashes Rapidly >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. 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.)

      Are the inspection results normal? 

      YES: GO TO 2.

      NO: 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? 

    YES: Inspection End.

    NO: GO TO 3.

  3. CHECK TRANSFER FLUID TEMPERATURE 

    Perform trouble diagnosis for transfer fluid temperature system. Refer to "DIAGNOSIS PROCEDURE ".

    Are the inspection results normal? 

    YES: GO TO 4.

    NO: Repair or replace damaged parts.

  4. SYMPTOM CHECK 

    Check again.

    Are the inspection results normal? 

    YES: Inspection End.

    NO: GO TO 5.

  5. CHECK TRANSFER CONTROL UNIT 

    Check transfer control unit input/output signal. Refer to "REFERENCE VALUE ".

    Are the inspection results normal? 

    YES: Inspection End.

    NO: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.