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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 333 (Meter, Warning Lamp & Indicator (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Unified Meter And A/C Amp. >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX70. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK FUSE

    Check for blown fuses.

    Power source Fuse No.
    Battery 6
    Ignition switch ACC or ON 19
    Ignition switch ON or START 3

    Is the inspection result normal?

    YES 

    GO TO STEP 2. 

    NO 

    Be sure to eliminate cause of malfunction before installing new fuse.

  2. CHECK POWER SUPPLY CIRCUIT

    Check voltage between unified meter and A/C amp. harness connector and ground.

    Terminals Ignition switch position Value (Approx.)
    (+) (-)
    Unified meter A/C amp. Terminal Signal name
    M67 54 Battery power supply Ground OFF Battery voltage
    41 ACC power supply ACC Battery voltage
    53 Ignition power supply ON Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 3. 

    NO 

    Check harness between unified meter and A/C amp. and fuse.

  3. CHECK GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect unified meter and A/C amp. connector.
    3. Check continuity between unified meter and A/C amp. harness connector and ground.
      Unified meter A/C amp. Ground Continuity
      Connector Terminal
      M67 55 Existed
      71 Existed

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Repair harness or connector.

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