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Inspection Flow

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. 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.

      Can the symptom be duplicated? 

      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) ".

    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 ".

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Adjust or replace compressor belt. Refer to "REMOVAL AND INSTALLATION ".

  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. Refer to COMPONENT INSPECTION .

    Does cooling fan motor operate correctly? 

    YES: GO TO 8.

    NO: Check cooling fan motor. Refer to DIAGNOSIS PROCEDURE .

  8. CHECK WATER VALVE OPERATION 

    Check and verify water valve for smooth operation. Refer to "DESCRIPTION ".

    Does water valve operate correctly? 

    YES: GO TO 9.

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

  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 "PRECAUTION FOR 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 performance test diagnoses. 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: Perform performance test diagnoses. Refer to "DIAGNOSTIC WORK FLOW ".

    NO: GO TO 13.

  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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