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Home >> Infiniti >> 2011 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Transfer Case (ATX90A)) >> DTC/Circuit Diagnosis >> 4WD Warning Lamp >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Perform the trouble diagnosis for power supply and ground circuit. Refer to "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 "COMBINATION METER : DIAGNOSIS PROCEDURE ".

      NO: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".