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

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

Component Function Check

Component Function Check

CHECK HEADLAMP (HI) OPERATION

CONSULT

Select “HEADLAMP (HI)” in “Active Test” mode of “IPDM E/R”.
Turn lighting switch 2ND.

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

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.

CHECK HEADLAMP (HI) OUTPUT VOLTAGE

CONSULT

Ignition switch ON.
Turn lighting switch 2nd.
Select “HEADLAMP (HI)” in “Active Test” mode of “IPDM E/R”.

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
RH	E48	54			Off	0V
LH	E44	59			On	Battery voltage
LH	E44	59			Off	0V

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

GO TO 5.

CHECK HEADLAMP (HI) POWER SUPPLY CIRCUIT (OPEN)

Ignition switch OFF.
Turn lighting switch OFF.
Disconnect IPDM E/R connector and front combination lamp 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	E48	54	E20	3	Yes
LH	E44	59	E21	3	Yes

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

Repair or replace harness.

CHECK HEADLAMP (HI) GROUND CIRCUIT

Check continuity between front combination lamp harness connector and ground.

Front combination lamp			—	Continuity
Connector		Terminal	—	Continuity
RH	E20	2	Ground	Yes
LH	E21	2	Ground	Yes

Is the inspection result normal?

YES>>

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

NO>>

Repair or replace harness.

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

Ignition switch OFF.
Turn lighting switch OFF.
Disconnect IPDM E/R connector, front combination lamp RH connector and front combination lamp LH connector.
Check continuity between IPDM E/R harness connector and ground.

IPDM E/R			—	Continuity
Connector		Terminal	—	Continuity
RH	E48	54	Ground	No
LH	E44	59	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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