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Nissan Sentra B18 (2020-2025) Service Manual: Combination Switch Input Circuit. Diagnosis Procedure

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK INPUT 1 - 6 CIRCUIT FOR OPEN

      1. Ignition switch OFF.

      2. Disconnect BCM connector and combination switch connector.

      3. Check continuity between BCM harness connector and combination switch harness connector.

        Combination switch signal

        BCM

        Combination switch

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        INPUT 1

        M83

        67

        M28

        1

        Yes

        INPUT 2

        68

        3

        INPUT 3

        69

        4

        INPUT 4

        70

        6

        INPUT 5

        71

        8

        INPUT 6

        72

        13

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Repair harness or connectors.

  2. CHECK INPUT 1 - 6 CIRCUIT FOR SHORT

    1. Check for continuity between BCM harness connector and ground.

      Combination switch signal

      BCM

      —

      Continuity

      Connector

      Terminal

      INPUT 1

      M83

      67

      Ground

      No

      INPUT 2

      68

      INPUT 3

      69

      INPUT 4

      70

      INPUT 5

      71

      INPUT 6

      72

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair harness or connectors.

  3. CHECK COMBINATION SWITCH INPUT VOLTAGE

      1. Connect BCM connector.

      2. Ignition switch ON.

      3. Check voltage between BCM harness connector and ground.

        Combination switch signal

        (+)

        (−)

        Voltage

        (Approx.)

        BCM

        Connector

        Terminal

        INPUT 1

        M83

        67

        Ground

        Refer to Reference Value.

        INPUT 2

        68

        INPUT 3

        69

        INPUT 4

        70

        INPUT 5

        71

        INPUT 6

        72

    Is the inspection result normal?

    YES >>

    Replace combination switch. Refer to Removal and Installation.

    NO >>

    Replace BCM. Refer to Removal and Installation.

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