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Home >> Infiniti >> 2016 >> QX70 AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater & Air Conditioning System (Automatic Air Conditioner) (Symptom Diagnosis & Removal And Installation) >> Symptom Diagnosis >> Self-Diagnosis Cannot Be Performed >> Inspection Procedure

Inspection Procedure

  1. CHECK SELF-DIAGNOSIS FUNCTION

    1. Turn ignition switch ON.
    2. Set in self-diagnosis mode as per the following. Within 10 seconds after starting engine (ignition switch is turned ON.), press OFF switch for at least 5 seconds.
    NOTE:
    • If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a result, the system may generate an error even when operation is normal. Start engine before performing this diagnosis to avoid this.
    • Former STEP-1 (indicators and display screen are checked) does not exist in this self-diagnosis function.
    • OFF switch may not be recognized according to the timing of pressing it. Operate OFF switch after the intake switch indicators are turned ON.

    Does self-diagnosis function operate?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 2. 

  2. CHECK POWER SUPPLY AND GROUND CIRCUIT OF UNIFIED METER AND A/C AMP.

    Check power supply and ground circuit of unified meter and A/C amp. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    Replace unified meter and A/C amp.

    NO 

    Repair or replace malfunctioning part(s).

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