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Home >> Infiniti >> 2015 >> Q50 Base, RWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater & Air Conditioning Control System (Exc Hybrid) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> A/C Auto Amp. >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE (IGNITION POWER SUPPLY)

    1. Turn ignition switch OFF.
    2. Check 10 A fuses [No. 12, located in fuse block (J/B)].
      NOTE:

      Refer to FUSE, CONNECTOR AND TERMINAL ARRANGEMENT .

    Is the inspection result normal?

    YES 

    GO TO STEP 2. 

    NO 

    Replace the blown fuse after repairing the affected circuit if a fuse is blown.

  2. CHECK A/C AUTO AMP. IGNITION POWER SUPPLY

    1. Disconnect A/C auto amp. connector.
    2. Turn ignition switch ON.
    3. Check voltage between A/C auto amp. harness connector and ground.
      + - Voltage
      A/C auto amp.
      Connector Terminal
      M88 23 Ground 11 - 14 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair harness or connector between A/C auto amp. and fuse.

  3. CHECK FUSE (ACCESSORY POWER SUPPLY)

    1. Turn ignition switch OFF.
    2. Check 10 A fuses [No. 1, located in fuse block (J/B)].
      NOTE:

      Refer to FUSE, CONNECTOR AND TERMINAL ARRANGEMENT .

    Is the inspection result normal?

    YES 

    GO TO STEP 4. 

    NO 

    Replace the blown fuse after repairing the affected circuit if a fuse is blown.

  4. CHECK A/C AUTO AMP. ACCESSORY POWER SUPPLY

    1. Disconnect A/C auto amp. connector.
    2. Turn ignition switch ACC.
    3. Check voltage between A/C auto amp. harness connector and ground.
      + - Voltage
      A/C auto amp.
      Connector Terminal
      M88 13 Ground 11 - 14 V

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair harness or connector between A/C auto amp. and fuse.

  5. CHECK FUSE (BATTERY POWER SUPPLY)

    1. Turn ignition switch OFF.
    2. Check 10 A fuse [No. 6, located in fuse block (J/B)].
      NOTE:

      Refer to FUSE, CONNECTOR AND TERMINAL ARRANGEMENT .

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Replace the blown fuse after repairing the affected circuit if a fuse is blown.

  6. CHECK A/C AUTO AMP. BATTERY POWER SUPPLY

    1. Disconnect A/C auto amp. connector.
    2. Check voltage between A/C auto amp. harness connector and ground.
      + - Voltage
      A/C auto amp.
      Connector Terminal
      M88 3 Ground 11 - 14 V

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair harness or connector between A/C auto amp. and fuse.

  7. CHECK A/C AUTO AMP. GROUND CIRCUIT FOR OPEN

    1. Turn ignition switch OFF.
    2. Check continuity between A/C auto amp. harness connector and ground.
      A/C auto amp. - Continuity
      Connector Terminal
      M88 2 Ground Existed
      22
      37
      54
      56

    Is the inspection result normal?

    YES 

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

    NO 

    Repair harness or connector.

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