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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Navigation System - With Amplifier) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Audio Amp. >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to the appropriate Wiring Diagram .

  1. CHECK FUSE 

    Check that the following fuses are not blown.

    Terminal No.

    Signal name

    Fuse No.

    1

    Battery power supply

    12 (15A)

    17

    Battery power supply

    11 (15A)

    Are the fuses blown?

    YES

    Replace the blown fuse after repairing the affected circuit.

    NO

    GO TO 2 .

  2. CHECK POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect audio amp. connector M112.
    3. Check voltage between audio amp. connector M112 and ground.

      Audio amp.

      Ground

      Condition

      Voltage

      (Approx.)

      Connector

      Terminal

      M112

      1

      -

      Ignition switch: OFF

      Battery voltage

      17

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    Repair or replace harness or connectors.

  3. CHECK GROUND CIRCUIT 

    Check continuity between audio amp. connector M112 and ground.

    Audio amp.

    Ground

    Continuity

    Connector

    Terminal

    M112

    4

    -

    Yes

    20

    Is the inspection result normal?

    YES

    Inspection End.

    NO

    Repair or replace harness or connectors.