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Home >> Nissan-Datsun >> 2021 >> Sentra S >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Exterior Lighting System - Led Headlamp (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> DTC B20E3-96: Led Headlamp LH >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK HEADLAMP (LO) LH OPERATION 

    SYMBOL CONSULT

    1. Ignition switch ON.
    2. Select "HEADLAMP (LO)" in "Active Test" mode of "IPDM E/R".
    3. With operating the test items, check that the headlamp (LO) LH is turned ON.

      On

      : Headlamp (LO) LH ON

      Off

      : Headlamp (LO) LH OFF

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Perform the headlamp (LO) LH circuit diagnosis. Refer to Diagnosis Procedure .

  2. CHECK HEADLAMP WARNING LH SIGNAL 

    +

    -

    (Approx.)

    Front combination lamp LH

    Connector

    Terminal

    E37

    7

    Ground

    Battery voltage

    Is the inspection result normal?

    YES

    Replace front combination lamp LH. Refer to Removal and Installation .

    NO

    GO TO 3.

  3. CHECK HEADLAMP WARNING LH SIGNAL CIRCUIT 
    1. Ignition switch OFF.
    2. Disconnect IPDM E/R connector and front combination lamp LH connector.
    3. Check continuity between front combination lamp LH harness connector and IPDM E/R harness connector.

      Front combination lamp LH

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E37

      7

      E48

      53

      Yes

    4. Check continuity between front combination lamp LH and ground.

    Front combination lamp LH

    --

    Continuity

    Connector

    Terminal

    E37

    7

    Ground

    No

    Is the inspection result normal?

    YES

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

    NO

    Repair or replace harness.