Nissan Sentra B18 (2020-2025) Service Manual: B1231-11 Dtrl Rh Pwr Sply Circ

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)		DTC detection condition
B1231–11	DTRL RH PWR SPLY CIRC (Daytime running light right hand power supply circuit)	[CIRCUIT SHORT TO GROUND]	Diagnosis condition	When daytime running light ON conditions are satisfied (Smart FET inside IPDM E/R is ON)
			Signal (terminal)	Daytime running light RH power supply circuit
			Threshold	Overcurrent is detected
			Diagnosis delay time	1 second or less

POSSIBLE CAUSE

• Harness or connector

• Front combination lamp RH

  • LED (parking lamp/daytime running light)

  • Harness

• IPDM E/R

FAIL-SAFE

Shuts off the power supply to the daytime running light RH power supply circuit until the daytime running light ON conditions are no longer satisfied.

Dtc Confirmation Procedure

DTC Confirmation Procedure

1. PRECONDITIONING

   1. CONSULT

      1. Ignition switch ON.

      2. Select “DTRL (RH) circ malfunctn” in “Data Monitor” mode of “IPDM E/R”.

      3. Check the monitor status.

         Monitor item	Monitor status
         DTRL (RH) circ malfunctn	0
         	1

   What is the monitor status?

   “0”>>

   GO TO 2.

   “1”>>

   A short circuit is detected multiple times in the daytime running light RH power supply circuit, and damage accumulates at the Smart FET inside the IPDM E/R. For this reason, IPDM E/R does not turn ON the Smart FET. Because the DTC cannot be reproduced in this state, refer to DTC Diagnosis Procedure and replace IPDM E/R after the malfunctioning part is repaired. Refer to Removal and Installation.

2. PERFORM DTC CONFIRMATION PROCEDURE

   1. CONSULT

      1. Ignition switch OFF.

      2. Start the engine.

      3. Select “Self Diagnostic Result” mode of “IPDM E/R”.

      4. Check DTC.

   Is DTC detected?

   YES >>

   Refer to DTC Diagnosis Procedure.

   NO >>

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

   NO >>

   Confirmation after repair: Inspection End.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

1. CHECK DAYTIME RUNNING LIGHT RH POWER SUPPLY CIRCUIT (SHORT)

   1. 1. Ignition switch OFF.

      2. Disconnect IPDM E/R connector and front combination lamp RH connector.

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

         IPDM E/R		—	Continuity
         Connector	Terminal
         E44	58	Ground	No

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Repair or replace harness.

2. CHECK DAYTIME RUNNING LIGHT RH POWER SUPPLY

   1. CONSULT

      1. Connect IPDM E/R connector.

      2. Ignition switch ON.

      3. Turn lighting switch 1ST.

      4. Select “DAYTIME RUNNING LIGHT” in “Active Test” mode of “IPDM E/R”.

      5. With operating the test item, check voltage between front combination lamp RH harness connector and ground.

         +		-	Test item		Voltage (Approx.)
         Front combination lamp RH
         Connector	Terminal
         E38	5	Ground	DAYTIME RUNNING LIGHT	On	Battery voltage
         				Off	0V

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

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

3. CHECK DAYTIME RUNNING LIGHT RH

   1. Check the daytime running light RH. Refer to Component Inspection.

   Is the inspection result normal?

   YES >>

   Inspection End.

   NO >>

   Repair or replace the malfunctioning part.