Nissan Sentra B18 (2020-2025) Service Manual / Driver Controls / Exterior Lighting System :: Led Headlamp / Dtc/circuit Diagnosis / Headlamp Warning Circuit

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

Component Function Check

Component Function Check

CHECK HEADLAMP WARNING OPERATION
1. 1. Ignition switch ON.
  2. Check that headlamp warning on combination meter is not displayed when lighting switch is turned 2ND.
Is the inspection result normal?
YES>>
Headlamp warning circuit is normal.
NO>>
Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

CHECK HEADLAMP WARNING LAMP SIGNAL CIRCUIT

Ignition switch OFF.
Disconnect front combination lamp connector.
Ignition switch ON.

Check voltage between front combination lamp harness connector and ground.

(+)			(–)	Voltage (Approx.)
Front combination lamp
Connector		Terminal	Ground	Battery voltage
RH	E38	7
LH	E37

Is the inspection result normal?

YES >>

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

NO >>

GO TO 2.

CHECK HEADLAMP WARNING LAMP SIGNAL CIRCUIT

Ignition switch OFF.
Disconnect IPDM E/R connector.

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	Continuity
RH	E44	60	E38	7	Yes
LH	E48	53	E37	7	Yes

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

IPDM E/R			(–)	Continuity
Connector		Terminal	(–)	Continuity
RH	E44	60	Ground	No
LH	E48	53	Ground	No

Is the inspection result normal?

YES>>

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

NO>>

Repair or replace harness.

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