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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater & Air Conditioning Control System (Automatic Air Conditioning) >> DTC/Circuit Diagnosis >> Unified Meter And A/C Amp. >> Diagnosis Procedure

Diagnosis Procedure

  1. INSPECTION BY FAIL-SAFE FUNCTION 
    1. Turn the ignition switch ON.
    2. After approximately 30 seconds, check that the air conditioner is operated by the fail-safe function (the operation display of air conditioner is not performed). Refer to "FAIL-SAFE ".

      Is the fail-safe function operated? 

      YES: GO TO  3.

      NO: GO TO 2.

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

    Check unified meter and A/C amp. power supply circuit and ground circuit. Refer to "UNIFIED METER AND A/C AMP.: DIAGNOSIS PROCEDURE ".

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Repair or replace parts according to the inspection results.

  3. CHECK PRESET SWITCH 

    Check preset switch. Refer to "SYMPTOM TABLE " (WITHOUT NAVIGATION), "SYMPTOM TABLE " (WITH NAVIGATION).

    Is the inspection result normal? 

    YES: Replace unified meter and A/C amp.

    NO: Repair or replace malfunctioning part(s).

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