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Nissan Sentra B18 (2020-2025) Service Manual: Headlamp (hi) Circuit

Component Function Check

Component Function Check

  1. CHECK HEADLAMP (HI) OPERATION

    1. CONSULT

      1. Select “HEADLAMP (HI)” in “Active Test” mode of “IPDM E/R”.

      2. Turn lighting switch 2ND.

      3. With operating the test item, check that the headlamp (HI) is turned ON.

        On

        : Headlamp (HI) ON

        Off

        : Headlamp (HI) OFF

    Is the inspection result normal?

    YES>>

    Headlamp (HI) circuit is normal.

    NO>>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK HEADLAMP (HI) BULB

    1. Check the headlamp (HI) bulb. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Replace corresponding headlamp (HI) bulb. Refer to Bulb Replacement.

  2. CHECK HEADLAMP (HI) OUTPUT VOLTAGE

    1. CONSULT

      1. Ignition switch ON.

      2. Turn lighting switch 2nd.

      3. Select “HEADLAMP (HI)” 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

        E48

        54

        Ground

        HEADLAMP (HI)

        On

        Battery voltage

        Off

        0V

        LH

        E44

        59

        On

        Battery voltage

        Off

        0V

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 5.

  3. CHECK HEADLAMP (HI) POWER SUPPLY CIRCUIT (OPEN)

      1. Ignition switch OFF.

      2. Turn lighting switch OFF.

      3. Disconnect IPDM E/R connector and front combination lamp connector.

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

        IPDM E/R

        Front combination lamp

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        RH

        E48

        54

        E20

        3

        Yes

        LH

        E44

        59

        E21

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace harness.

  4. CHECK HEADLAMP (HI) GROUND CIRCUIT

    1. Check continuity between front combination lamp harness connector and ground.

      Front combination lamp

      Continuity

      Connector

      Terminal

      RH

      E20

      2

      Ground

      Yes

      LH

      E21

    Is the inspection result normal?

    YES>>

    Replace corresponding headlamp (HI) bulb. Refer to Bulb Replacement.

    NO>>

    Repair or replace harness.

  5. CHECK HEADLAMP (HI) POWER SUPPLY CIRCUIT (SHORT TO GROUND)

      1. Ignition switch OFF.

      2. Turn lighting switch OFF.

      3. Disconnect IPDM E/R connector, front combination lamp RH connector and front combination lamp LH connector.

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

      IPDM E/R

      Continuity

      Connector

      Terminal

      RH

      E48

      54

      Ground

      No

      LH

      E44

      59

    Is the inspection result normal?

    YES >>

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

    NO >>

    Repair or replace harness.

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