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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Heater & Air Conditioning Control System (Except Hybrid)) >> Symptom Diagnosis >> Insufficient Cooling >> Front Air Conditioner >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Perform self - diagnoses with CONSULT before performing symptom diagnosis. If any DTC is detected, perform the corresponding diagnosis.

  1. CHECK MAGNET CLUTCH OPERATION

    1. Turn ignition switch ON.
    2. Operate fan switch.
    3. Press A/C switch.
    4. Check that A/C indicator turns ON. Check visually and by sound that compressor operates.
    5. Press A/C switch again.
    6. Check that A/C indicator turns OFF. Check that compressor stops.

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Perform diagnosis of "COMPRESSOR DOES NOT OPERATE" in "SYMPTOM DIAGNOSIS". Refer to DIAGNOSIS PROCEDURE .

  2. CHECK DRIVE BELT

    Check tension of drive belt. Refer to CHECKING DRIVE BELTS .

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Adjust or replace drive belt depending on the inspection results.

  3. CHECK REFRIGERANT CYCLE

    Connect recovery/recycling recharging equipment to the vehicle and perform pressure inspection with gauge. Refer to SYMPTOM TABLE .

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace parts depending on the inspection results.

  4. CHECK AIR LEAKAGE FROM EACH DUCT

    Check duct and nozzle, etc. of the front air conditioning system for leakage.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace parts depending on the inspection results.

  5. CHECK AMBIENT TEMPERATURE DISPLAY

    Check that there is not much difference between actual ambient temperature and indicated temperature on information display in combination meter.

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Perform diagnosis for the A/C auto amp. connection recognition signal circuit. Refer to DIAGNOSIS PROCEDURE .

  6. CHECK SETTING OF TEMPERATURE SETTING TRIMMER (FRONT)

    1. Check setting value of temperature setting trimmer (front). Refer to TEMPERATURE SETTING TRIMMER (FRONT) .
    2. Check that temperature setting trimmer (front) is set to "+ direction".
      NOTE:

      The control temperature can be set with the setting of the temperature setting trimmer (front).

    3. Set difference between set temperature and control temperature to "0".

    Is inspection result normal?

    YES 

    Inspection End.

    NO 

    Replace A/C auto amp. Refer to REMOVAL AND INSTALLATION .

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