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Nissan Sentra B18 (2020-2025) Service Manual: Dtc/circuit Diagnosis

Power Supply and Ground Circuit

Av Control Unit

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE

    1. Check that the following fuse is not blown:

      Terminal No.

      Signal name

      Fuse No.

      Capacity

      19

      Battery power supply

      40

      20 A

    Is the fuse blown?

    YES >>

    Replace the blown fuse after repairing the affected circuit.

    NO >>

    GO TO 2.

  2. CHECK POWER SUPPLY CIRCUIT

      1. Ignition switch OFF.

      2. Disconnect AV control unit connector.

      3. Check voltage between AV control unit connector and ground.

        AV control unit

        —

        Condition

        Voltage

        (Approx.)

        Connector

        Terminal

        M92

        19

        Ground

        Ignition switch: OFF

        Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair or replace harness or connectors.

  3. CHECK GROUND CIRCUIT

      1. Disconnect AV control unit connector.

      2. Check continuity between AV control unit connector and ground.

        AV control unit

        —

        Continuity

        Connector

        Terminal

        M92

        20

        Ground

        Yes

        M93

        29

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Repair or replace harness or connectors.

Rear View Camera Image Signal Circuit

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK CAMERA POWER SUPPLY CIRCUIT CONTINUITY

      1. Ignition switch OFF.

      2. Disconnect AV control unit connector and rear view camera connector.

      3. Check continuity between AV control unit connector and rear view camera connector.

        AV control unit

        Rear view camera

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M93

        39

        B30

        1

        Yes

      4. Check continuity between AV control unit connector and ground.

        AV control unit

        —

        Continuity

        Connector

        Terminal

        M93

        39

        Ground

        No

    Is inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Repair or replace harness or connectors.

  2. CHECK CAMERA POWER SUPPLY VOLTAGE

      1. Connect AV control unit connector and rear view camera connector.

      2. Ignition switch ON.

      3. Shift the selector lever to R (reverse).

      4. Check voltage between AV control unit connector and ground.

        AV control unit

        (−)

        Condition

        Voltage

        (Approx.)

        (+)

        Connector

        Terminal

        M93

        39

        Ground

        Selector lever is in “R”.

        6.0 V

    Is inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Replace AV control unit. Refer to Removal and Installation.

  3. CHECK CAMERA IMAGE SIGNAL CIRCUIT CONTINUITY

      1. Ignition switch OFF.

      2. Disconnect AV control unit connector and rear view camera connector.

      3. Check continuity between AV control unit connector and rear view camera connector.

        AV control unit

        Rear view camera

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M93

        40

        B30

        3

        Yes

      4. Check continuity between AV control unit connector and ground.

        AV control unit

        —

        Continuity

        Connector

        Terminal

        M93

        40

        Ground

        No

    Is inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace harness or connectors.

  4. CHECK CAMERA GROUND CIRCUIT CONTINUITY

    1. Check continuity between AV control unit connector and rear view camera connector.

      AV control unit

      Rear view camera

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M93

      59

      B30

      2

      Yes

    Is inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Repair or replace harness or connectors.

  5. CHECK CAMERA IMAGE SIGNAL

      1. Connect AV control unit connector and rear view camera connector.

      2. Ignition switch ON.

      3. Shift the selector lever to R (reverse).

      4. Check signal between AV control unit connector and ground.

        AV control unit

        (−)

        Condition

        Reference value

        (+)

        Connector

        Terminal

        M93

        40

        Ground

        Camera image displayed.

    Is inspection result normal?

    YES >>

    Replace AV control unit. Refer to Removal and Installation.

    NO >>

    Replace rear view camera. Refer to Removal and Installation.

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