Nissan Rogue (T33) 2021-Present Service Manual: B20a4-87 Headlamp (lh) Lin Communication

Nissan Rogue (T33) 2021-Present Service Manual / Driver Controls :: Exterior Lighting System / Led Headlamp :: Dtc/circuit Diagnosis / B20a4-87 Headlamp (lh) Lin Communication

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC detection condition
B20A4–87

Headlamp (LH) LIN communication

[Headlamp (left hand) local interconnect network communication] 		[MISSING MESSAGE] Diagnosis condition Ignition switch ON
Signal (terminal) Headlamp LH LIN communication
Threshold Detected headlamp LH LIN communication error
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

  • Harness or connector

  • Front combination lamp LH

    • LED headlamp control module

    • Harness

  • IPDM E/R

FAIL-SAFE

  • Transmits the headlamp warning signal (CAN communication) to the combination meter (when the ignition switch is placed ON, the headlamp warning is displayed on the information display of the combination meter).

  • Transmits the request signal (via LIN communication) to the both side LED headlamp control module, and turns ON the headlamp (LO) and parking lamp.

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

  2. Select “Self diagnosis result” mode of “IPDM E/R”.

  3. Check DTC.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK SELF-DIAG RESULT

CONSULT

  1. Ignition switch ON

  2. Select “Self diagnosis result” mode of “IPDM E/R”.

  3. Check if DTC "B20A4–87" is displayed with DTC "B20A2–87".

Is applicable DTC detected?

YES>>

GO TO 2.

NO>>

GO TO 3.

CHECK HEADLAMP LH LIN COMMUNICATION CIRCUIT 1

  1. Ignition switch OFF.

  2. Disconnect following connectors:

    • Front combination lamp RH

    • Front combination lamp LH

    • IPDM E/R

  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
    E109 2 E120 38 Yes

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

    IPDM E/R — Continuity
    Connector Terminal
    M120 38 Ground No

Is the inspection result normal?

YES>>

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

NO>>

Repair or replace harness.

CHECK HEADLAMP LH FUSE

  1. Ignition switch OFF.

  2. Check that the following fuse is not blown (open):

    Unit Location Fuse No. Capacity
    Battery power supply Fuse and fusible link box 1 J 15 A

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

NO>>

GO TO 4.

CHECK HEADLAMP LH POWER SUPPLY

  1. Disconnect front combination lamp LH connector

  2. Check voltage between front combination lamp LH harness connector and ground.

    + -

    Voltage

    (Approx.)
    Front combination lamp LH
    Connector Terminal
    E109 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace harness.

CHECK HEADLAMP LH GROUND CIRCUIT

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

Front combination lamp LH — Continuity
Connector Terminal
E109 6 Ground Yes

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair or replace harness.

CHECK HEADLAMP LH CONTROL SIGNAL

  1. Ignition switch ON.

  2. Check voltage between front combination lamp LH harness connector and ground.

    + -

    Voltage

    (Approx.)
    Front combination lamp LH
    Connector Terminal
    E109 5 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

GO TO 7.

CHECK HEADLAMP LH CONTROL SIGNAL CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect IPDM E/R 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
    E109 5 E217 50 Yes

Is the inspection result normal?

YES>>

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

NO>>

Repair or replace harness.

CHECK HEADLAMP LH LIN COMMUNICATION CIRCUIT 2

  1. Ignition switch OFF.

  2. Disconnect IPDM E/R 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
    E109 2 E120 38 Yes

Is the inspection result normal?

YES>>

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

NO>>

Repair or replace harness.

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