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Inspection Flow

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
    1. Press the AUTO switch.
    2. Turn temperature control dial (driver) counterclockwise until 18°C (60°F) is displayed.
    3. Check for cold air at discharge air outlets.

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

  2. CHECK FOR ANY SYMPTOMS

    Perform a complete operational check for any symptoms. Refer to "OPERATIONAL CHECK (FRONT) " or "OPERATIONAL CHECK (REAR) ".

    Does another symptom exist? 

    YES: Refer to "SYMPTOM MATRIX CHART ".

    NO: System OK.

  3. CHECK FOR SERVICE BULLETINS

    Check for any service bulletins.

    GO TO 4.

  4. PERFORM SELF-DIAGNOSIS

    Perform self-diagnosis Refer to "A/C AUTO AMP. SELF- DIAGNOSIS ".

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Refer to "A/C SYSTEM SELF-DIAGNOSIS CODE CHART ".

  5. CHECK DRIVE BELTS

    Check compressor belt tension. Refer to "CHECKING DRIVE BELTS " (VQ40DE) or "CHECKING DRIVE BELTS " (VK56DE).

    Is the inspection result normal? 

    OK: GO TO 6.

    NG: Adjust or replace compressor belt. Refer to "ADJUSTMENT ", "REMOVAL AND INSTALLATION " (VQ40DE) or "ADJUSTMENT ", "REMOVAL AND INSTALLATION " (VK56DE).

  6. CHECK AIR MIX DOOR OPERATION

    Check and verify air mix door mechanism for smooth operation. Refer to "AIR MIX DOOR MOTOR (DRIVER) COMPONENT FUNCTION CHECK " or "AIR MIX DOOR MOTOR (PASSENGER) COMPONENT FUNCTION CHECK ".

    Does air mix door operate correctly? 

    YES: GO TO 7.

    NO: Check air mix door motor circuit. Refer to "AIR MIX DOOR MOTOR (DRIVER) DIAGNOSIS PROCEDURE " or "AIR MIX DOOR MOTOR (PASSENGER) DIAGNOSIS PROCEDURE ".

  7. CHECK COOLING FAN MOTOR OPERATION

    Check and verify cooling fan motor for smooth operation.

    Does cooling fan motor operate correctly? 

    YES: GO TO 8.

    NO: Check cooling fan motor.

  8. CHECK WATER VALVE OPERATION (VK56DE ONLY)

    Check and verify water valve for smooth operation. Refer to "WATER VALVE DESCRIPTION (VK56DE) ".

    Does water valve operate correctly? 

    YES: GO TO 9.

    NO: Check water valve circuit. Refer to "WATER VALVE DIAGNOSIS PROCEDURE (VK56DE) ".

  9. CHECK RECOVERY/RECYCLING EQUIPMENT BEFORE USAGE

    Check recovery/recycling equipment before connecting to vehicle. Verify there is no pressure in the recovery/recycling equipment by checking the gauges. If pressure exists, recover refrigerant from equipment lines.

    GO TO 10.

  10. CHECK REFRIGERANT PURITY
    1. Connect recovery/recycling equipment to vehicle.
    2. Confirm refrigerant purity in supply tank using recovery/recycling and refrigerant identifier.

      Is the inspection result normal? 

      YES: GO TO 11.

      NO: Check contaminated refrigerant. Refer to "WORKING WITH HFC-134A (R-134A) ".

  11. CHECK FOR EVAPORATOR FREEZE UP

    Start engine and run A/C. Check for evaporator freeze up.

    Does evaporator freeze up? 

    YES: Perform diagnostic work flow. Refer to "DIAGNOSTIC WORK FLOW ".

    NO: GO TO 12.

  12. CHECK REFRIGERANT PRESSURE

    Check refrigerant pressure with manifold gauge connected. Refer to "PERFORMANCE CHART ".

    Is the inspection result normal? 

    YES: GO TO 13.

    NO: Perform diagnostic work flow. Refer to "DIAGNOSTIC WORK FLOW ".

  13. CHECK AIR DUCTS

    Check ducts for air leaks.

    Is the inspection result normal? 

    YES: System OK.

    NO: Repair air leaks.

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