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Nissan Sentra B18 (2020-2025) Service Manual: Tail Lamp Circuit

Component Function Check

Component Function Check

  1. CHECK TAIL LAMP OPERATION

    1. CONSULT

      1. Select “TAIL LAMP” in “Active Test” mode of “IPDM E/R”.

      2. With operating the test item, check that the tail lamp is turned ON.

        On

        : Tail Lamp ON

        Off

        : Tail lamp OFF

    Is the inspection result normal?

    YES>>

    Tail lamp circuit is normal.

    NO>>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK TAIL LAMP BULB

    1. Check the tail lamp bulb. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Rear combination lamp (body side): Replace corresponding rear combination lamp (body side) bulb. Refer to Bulb Replacement.

    NO >>

    Rear combination lamp (trunk lid side): Replace corresponding rear combination lamp (trunk lid side) bulb. Refer to Removal and Installation.

  2. CHECK TAIL LAMP OUTPUT VOLTAGE

    1. CONSULT

      1. Ignition switch ON.

      2. Turn lighting switch 1st.

      3. Select “TAIL LAMP” in “Active Test” mode of “IPDM E/R”.

      4. With operating the test item, check voltage between IPDM E/R harness connector and ground.

        +

        -

        Test item

        Voltage

        (Approx.)

        IPDM E/R

        Connector

        Terminal

        RH

        E47

        17

        Ground

        TAIL LAMP

        On

        Battery voltage

        Off

        0V

        LH

        4

        On

        Battery voltage

        Off

        0V

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 5.

  3. CHECK TAIL LAMP POWER SUPPLY CIRCUIT (OPEN)

      1. Ignition switch OFF.

      2. Turn lighting switch OFF.

      3. Disconnect the following connectors:

        • IPDM E/R

        • Rear combination lamp LH (body side)

        • Rear combination lamp LH (trunk lid side)

        • Rear combination lamp RH (body side)

        • Rear combination lamp RH (trunk lid side)

        • License plate lamp LH

        • License plate lamp RH

      4. Check continuity between IPDM E/R harness connector and each rear combination lamp harness connector.

        Body side

        IPDM E/R

        Rear combination lamp (body side)

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        RH

        E47

        17

        B42

        2

        Yes

        LH

        4

        B25
        Trunk lid side

        IPDM E/R

        Rear combination lamp (trunk lid side)

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        RH

        E47

        17

        B75

        1

        Yes

        LH

        4

        B88

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace harness.

  4. CHECK TAIL LAMP GROUND CIRCUIT

    1. Check continuity between each rear combination lamp harness connector and ground.

      Body side

      Rear combination lamp (body side)

      —

      Continuity

      Connector

      Terminal

      RH

      B42

      4

      Ground

      Yes

      LH

      B25
      Trunk lid side

      Rear combination lamp (trunk lid side)

      —

      Continuity

      Connector

      Terminal

      Terminal

      RH

      B75

      4

      Ground

      Yes

      LH

      B88

    Is the inspection result normal?

    YES >>

    Rear combination lamp (body side): Replace corresponding rear combination lamp (body side) bulb. Refer to Bulb Replacement.

    YES >>

    Rear combination lamp (trunk lid side): Replace corresponding rear combination lamp (trunk lid side) bulb. Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

  5. CHECK TAIL LAMP POWER SUPPLY CIRCUIT (SHORT TO GROUND)

      1. Ignition switch OFF

      2. Turn lighting switch OFF.

      3. Disconnect the following connectors:

        • IPDM E/R

        • Rear combination lamp LH (body side)

        • Rear combination lamp LH (trunk lid side)

        • Rear combination lamp RH (body side)

        • Rear combination lamp RH (trunk lid side)

        • License plate lamp LH

        • License plate lamp RH

      4. Check continuity between IPDM E/R harness connector and ground.

      IPDM E/R

      —

      Continuity

      Connector

      Terminal

      RH

      E47

      17

      Ground

      No

      LH

      4

    Is the inspection result normal?

    YES >>

    Replace IPDM E/R. Refer to Removal and Installation.

    NO >>

    Repair or replace harness.

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