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Nissan Sentra B18 (2020-2025) Service Manual: Power Supply and Ground Circuit

A/c Auto Amp.

Diagnosis Procedure

Diagnosis Procedure

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

      1. Ignition switch OFF.

      2. Disconnect A/C auto amp. connector.

      3. Check continuity between A/C auto amp. harness connector and ground.

        A/C auto amp.

        —

        Continuity

        Connector

        Terminal

        M34

        58

        Ground

        Yes

    Is the inspection result normal?

    YES>>

    GO TO 2.

    NO>>

    Repair harness or connector.

  2. CHECK FUSE

    1. Check that the following fuse is not blown (open):

      Component

      Location

      Fuse No.

      Capacity

      A/C auto amp.

      Fuse block (J/B)

      6

      10 A

    Is the fuse blown (open)?

    YES>>

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

    NO>>

    GO TO 3.

  3. CHECK A/C AUTO AMP. POWER SUPPLY

      1. Connect A/C auto amp. connector.

      2. Ignition switch ON.

      3. Check voltage between A/C auto amp. harness connector terminals.

        +

        -

        Voltage

        (Approx.)

        A/C auto amp.

        Connector

        Terminal

        M34

        60

        Ground

        Battery voltage

    Is the inspection result normal?

    YES>>

    Replace A/C auto amp. Refer to Removal and Installation.

    NO>>

    Repair the A/C auto amp. accessory power supply circuit.

A/c Switch Assembly

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

      1. Ignition switch OFF.

      2. Check that the following fuse is not blown (open):

        Component

        Location

        Fuse No.

        Capacity

        A/C switch assembly

        Fuse block (J/B)

        6

        10 A

    Is the fuse blown (open)?

    YES >>

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

    NO >>

    GO TO 2.

  2. CHECK A/C SWITCH ASSEMBLY POWER SUPPLY

      1. Disconnect A/C switch assembly connector.

      2. Ignition switch ON.

      3. Check voltage between A/C switch assembly harness connector and ground.

        +

        −

        Voltage

        (Approx.)

        A/C switch assembly

        Connector

        Terminal

        M59

        5

        Ground

        Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair harness or connector between A/C switch assembly and fuse.

  3. CHECK A/C SWITCH ASSEMBLY GROUND CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Check continuity between A/C switch assembly harness connector and ground.

        A/C switch assembly

        —

        Continuity

        Connector

        Terminal

        M59

        7

        Ground

        Yes

    Is the inspection result normal?

    YES >>

    Replace A/C switch assembly. Refer to Removal and Installation.

    NO >>

    Repair harness or connector.

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