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Home >> Infiniti >> 2021 >> Q50 Signature Edition, AWD >> Repair and Diagnosis >> Electrical >> Gauges >> Meter, Warning Lamp & Indicator (Diagnostics) >> Component/Circuit Diagnosis >> Power Supply And Ground Circuit (Combination Meter) >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE 

    Check for blown fuses.

    Power source

    Fuse No.

    Battery

    6

    Ignition switch ON or START

    11

    Ignition switch ON or ACC

    1

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

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

  2. CHECK POWER SUPPLY CIRCUIT 

    Check voltage between combination meter harness connector and ground.

    Terminals

    Ignition switch position

    Voltage

    (Approx.)

    (+)

    (-)

    Combination meter

    Ground

    Connector

    Terminal

    M58

    45

    OFF

    Battery voltage

    M57

    14

    ACC

    M58

    46

    ON

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Check harness between combination meter and fuse.

  3. CHECK GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector.
    3. Check continuity between combination meter harness connector and ground.

      Combination meter

      Ground

      Continuity

      Connector

      Terminal

      M57

      1

      Existed

      M58

      52

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair harness or connector.