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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 >> Power Supply And Ground Circuit >> Unified Meter And A/C Amp. >> UNIFIED METER AND A/C AMP.: Diagnosis Procedure

UNIFIED METER AND A/C AMP.: Diagnosis Procedure

  1. CHECK FUSE 

    Check 10A fuses [Nos. 3, 6 and 19, located in the fuse block (J/B)].

    NOTE: Refer to "FUSE, CONNECTOR AND TERMINAL ARRANGEMENT ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Check harness for short circuit and replace fuse.

  2. CHECK POWER SUPPLY CIRCUIT FOR UNIFIED METER AND A/C AMP. 
    1. Disconnect unified meter and A/C amp. connector.
    2. Check voltage between unified meter and A/C amp. harness connector and ground.
      (+) (-) Voltage
      Unified meter and A/C amp. - Ignition switch position
      Connector Terminal OFF ACC ON
      M67 41 Ground Approx. 0 V Battery voltage Battery voltage
      53 Approx. 0 V Approx. 0 V Battery voltage
      54 Battery voltage Battery voltage Battery voltage

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair harness or connector.

  3. CHECK GROUND CIRCUIT FOR UNIFIED METER AND A/C AMP. 
    1. Turn ignition switch OFF.
    2. Check continuity between unified meter and A/C amp. harness connector and ground.
      Unified meter and A/C amp. - Continuity
      Connector Terminal
      M67 55 Ground Existed
      71

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Repair harness or connector.

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