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Home >> Infiniti >> 2018 >> QX80 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter, Warning Lamp & Indicator (Diagnostics) >> Component Parts /Circuit Diagnosis >> Trip Computer Switch Signal Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK COMBINATION METER INPUT SIGNAL 
    1. Turn ignition switch ON.
    2. Measure voltage between the following terminals of the combination meter.

      (+)

      (-)

      Condition

      Voltage

      (Approx.)

      Combination meter

      Ground

      Connector

      Terminals

      M34

      11

      When enter switch is pressed

      0 V

      Other than the above

      5 V

      12

      When select switch is pressed

      0 V

      Other than the above

      5 V

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 2.

  2. CHECK TRIP COMPUTER SWITCH SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector and trip computer switch connector.
    3. Check continuity between combination meter harness connector and trip computer switch harness connector.

      Terminals

      Continuity

      Combination meter

      Trip computer switch

      Connector

      Terminal

      Connector

      Terminal

      M34

      11

      M84

      3

      Existed

      12

      4

    4. Check continuity between combination meter harness connector and ground.

      Combination meter

      Ground

      Continuity

      Connector

      Terminal

      M34

      11

      Not existed

      12

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair harness or connector.

  3. CHECK TRIP COMPUTER SWITCH GROUND CIRCUIT 

    Check continuity between trip computer switch connector and ground.

    Trip computer switch

    Ground

    Continuity

    Connector

    Terminal

    M84

    6

    Existed

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair harness or connector.