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Inspection Flow

WARNING: This page is about a different car, the 2008 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR SERVICE BULLETINS

    Check for any service bulletins.

    GO TO 2.

  2. CONFIRM SYMPTOM BY PERFORMING REAR AIR CONTROL (FRONT) AIR MIX DOOR MOTOR OPERATIONAL CHECK
    1. Start and run engine to operating temperature.
    2. Turn the rear blower motor to maximum speed from the rear air control (front).
    3. Turn rear air control (front) temperature control dial clockwise and then counterclockwise (REAR CTRL indicator off).
    4. Check for hot air at rear discharge air outlets in the maximum heat position and cold air at discharge air outlets in the maximum cold position.

    Does the rear air control (front) operate properly? 

    YES: GO TO 3.

    NO: Check rear air control (front). Refer to "AIR MIX DOOR MOTOR (REAR) DIAGNOSIS PROCEDURE ".

  3. CONFIRM SYMPTOM BY PERFORMING REAR AIR CONTROL (REAR) AIR MIX DOOR MOTOR OPERATIONAL CHECK
    1. Press the REAR CTRL switch on rear air control (front) to send control to the rear air control (rear).
    2. Turn rear air control (rear) temperature control dial slowly clockwise and then counterclockwise (REAR CTRL indicator on).
    3. Check for hot air at rear discharge air outlets in the maximum heat position and cold air at rear discharge air outlets in the maximum cold position.

    Does the rear air control (rear) operate properly? 

    YES: GO TO 4.

    NO: Check rear air control (rear). Refer to "REAR AIR CONTROL (REAR) DIAGNOSIS PROCEDURE #2 ".

  4. CONFIRM SYMPTOM BY PERFORMING REAR AIR CONTROL (FRONT) MODE OPERATIONAL CHECK
    1. Press the REAR CTRL switch on rear air control (front) (REAR CTRL indicator off).
    2. Press each mode switch and check for proper air discharge at the appropriate locations.

    Does the rear air control (front) operate properly? 

    YES: GO TO 5.

    NO: Check mode door motor (rear). Refer to "MODE DOOR MOTOR (REAR) DIAGNOSIS PROCEDURE ".

  5. CONFIRM SYMPTOM BY PERFORMING REAR AIR CONTROL (REAR) MODE OPERATIONAL CHECK
    1. Press the REAR CTRL switch on rear air control (front) to send control to the rear air control (rear).
    2. Press each mode switch and check for proper air discharge at the appropriate locations.

    Does the rear air control (rear) operate properly? 

    YES: System OK.

    NO: Replace rear air control (rear). Refer to "REMOVAL AND INSTALLATION ".

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