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

Component Function Check

1. CHECK HEADLAMP (HI) OPERATION

   1. CONSULT

      1. Select “HEADLAMP (HI)” in “Active Test” mode of “IPDM E/R”.

      2. Turn lighting switch 2ND.

      3. 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

1. 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.

2. CHECK HEADLAMP (HI) OUTPUT VOLTAGE

   1. CONSULT

      1. Ignition switch ON.

      2. Turn lighting switch 2nd.

      3. Select “HEADLAMP (HI)” in “Active Test” mode of “IPDM E/R”.

      4. 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
         					Off	0V
         LH	E44	59			On	Battery voltage
         					Off	0V

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   GO TO 5.

3. CHECK HEADLAMP (HI) POWER SUPPLY CIRCUIT (OPEN)

   1. 1. Ignition switch OFF.

      2. Turn lighting switch OFF.

      3. Disconnect IPDM E/R connector and front combination lamp connector.

      4. 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
         RH	E48	54	E20	3	Yes
         LH	E44	59	E21

   Is the inspection result normal?

   YES >>

   GO TO 4.

   NO >>

   Repair or replace harness.

4. CHECK HEADLAMP (HI) GROUND CIRCUIT

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

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

   Is the inspection result normal?

   YES>>

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

   NO>>

   Repair or replace harness.

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

   1. 1. Ignition switch OFF.

      2. Turn lighting switch OFF.

      3. Disconnect IPDM E/R connector, front combination lamp RH connector and front combination lamp LH connector.

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

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

   Is the inspection result normal?

   YES >>

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

   NO >>

   Repair or replace harness.

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