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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Exterior Lighting System (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> Headlamp (Hi) Circuit >> Diagnosis Procedure - For USA

Diagnosis Procedure - For USA

  1. CHECK HEADLAMP (HI) FUSES 
    1. Ignition switch OFF.
    2. Check that the following fuses are not open.

    Unit

    Location

    Fuse No.

    Capacity

    Headlamp HI (LH)

    IPDM E/R

    35

    10A

    Headlamp HI (RH)

    IPDM E/R

    34

    10A

    Is the fuse open?

    YES

    Replace the fuse after repairing the affected circuit.

    NO

    GO TO 2.

  2. CHECK HIGH BEAM BULB 

    Check the applicable high beam bulb to be sure the proper bulb standard is in use and the bulb is not open.

    Is the bulb OK?

    YES

    GO TO 3.

    NO

    Replace the bulb.

  3. CHECK HEADLAMP (HI) OUTPUT VOLTAGE 
    1. Disconnect the front combination lamp connector.
    2. Ignition switch ON.
    3. Turn the high beam headlamps ON.
    4. With the high beam headlamps ON, check the voltage between the front combination lamp connector and ground.

    (+)

    (-)

    Voltage

    (Approx.)

    Front combination lamp

    Connector

    Terminal

    LH

    E11

    1

    Ground

    Battery voltage

    RH

    E107

    1

    Is battery voltage present?

    YES

    GO TO 9.

    NO

    GO TO 4 (front combination lamp LH).

    GO TO 5 (front combination lamp RH).

  4. CHECK HEADLAMP (HI) CIRCUIT FOR OPEN 
    1. Ignition switch OFF.
    2. Disconnect IPDM E/R connector.
    3. Check continuity between the IPDM E/R harness connector and the front combination lamp LH harness connector.

    IPDM E/R

    Front combination lamp

    Continuity

    Connector

    Terminal

    Connector

    Terminal

    E123

    55

    E11

    1

    Yes

    Does continuity exist?

    YES

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

    NO

    Repair the harnesses or connectors.

  5. CHECK DAYTIME RUNNING LIGHT RELAY 2 TO FRONT COMBINATION LAMP RH CIRCUIT FOR OPEN 
    1. Disconnect daytime running light relay 2 connector.
    2. Check continuity between the daytime running light relay 2 harness connector and the front combination lamp RH harness connector.

    Daytime running light relay 2

    Front combination lamp RH

    Continuity

    Connector

    Terminal

    Connector

    Terminal

    E102

    5

    E107

    1

    Yes

    Does continuity exist?

    YES

    GO TO 6.

    NO

    Repair the harnesses or connectors.

  6. CHECK DAYTIME RUNNING LIGHT RELAY 2 VOLTAGE CIRCUIT 
    1. With the high beam headlamps ON, check the voltage between the daytime running light relay 2 connector and ground.

    (+)

    (-)

    Voltage

    (Approx.)

    Daytime running light relay 2

    Connector

    Terminal

    E102

    1

    Ground

    Battery voltage

    3

    Is battery voltage present?

    YES

    GO TO 7.

    NO

    GO TO 8.

  7. CHECK DAYTIME RUNNING LIGHT RELAY 2 GROUND CIRCUIT 

    Check continuity between the daytime running light relay 2 harness connector and ground.

    Daytime running light relay 2

    --

    Continuity

    Connector

    Terminal

    E102

    2

    Ground

    Yes

    Does continuity exist?

    YES

    Replace daytime running light relay 2.

    NO

    Repair the harness or connector.

  8. CHECK IPDM E/R TO DAYTIME RUNNING LIGHT RELAY 2 CIRCUIT FOR OPEN 
    1. Disconnect IPDM E/R connector.
    2. Check continuity between the daytime running light relay 2 harness connector and the IPDM E/R connector.

    Daytime running light relay 2

    IPDM E/R

    Continuity

    Connector

    Terminal

    Connector

    Terminal

    E102

    1

    E123

    56

    Yes

    3

    Does continuity exist?

    YES

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

    NO

    Repair the harnesses or connectors.

  9. CHECK FRONT COMBINATION LAMP (HI) GROUND CIRCUIT 

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

    Front combination lamp

    --

    Continuity

    Connector

    Terminal

    LH

    E11

    2

    Ground

    Yes

    RH

    E107

    2

    Does continuity exist?

    YES

    Replace malfunctioning lamp.

    NO

    Repair the harness or connector (front combination lamp LH).

    GO TO 10 (front combination lamp RH).

  10. CHECK FRONT COMBINATION LAMP RH TO DAYTIME RUNNING LIGHT RELAY 1 GROUND CIRCUIT 
    1. Disconnect daytime running light relay 1 connector.
    2. Check continuity between the daytime running light relay 1 harness connector and the front combination lamp RH harness connector.

    Daytime running light relay 1

    Front combination lamp RH

    Continuity

    Connector

    Terminal

    Connector

    Terminal

    E103

    3

    E107

    2

    Yes

    Does continuity exist?

    YES

    GO TO 11.

    NO

    Repair the harnesses or connectors.

  11. CHECK DAYTIME RUNNING LIGHT RELAY 1 GROUND CIRCUIT 

    Check continuity between the daytime running light relay 1 harness connector and ground.

    Daytime running light relay 1

    --

    Continuity

    Connector

    Terminal

    E103

    4

    Ground

    Yes

    Does continuity exist?

    YES

    Replace daytime running light relay 1.

    NO

    Repair the harness or connector.

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