Nissan Pathfinder: Defogger - Symptom Diagnosis

• Defogger System Symptoms
• Rear Window Defogger and Door Mirror Defogger Do Not Operate.
• Rear Window Defogger Does Not Operate but Both of Door Mirror Defogger Operate.
• Both Doors Mirror Defogger Dont Operate but Rear Window Defogger Operates
• Driver Side Door Mirror Defogger Does Not Operate.
• Rear Window Defogger Switch Does Not Light, but Rear Window Defogger Operates
• Heated Washer Nozzles Do Not Operate, but Rear Window Defogger Operates

Defogger System Symptoms Nissan Pathfinder 5th Gen

Symptom Table

Symptom	Reference page
Rear window defoggers and door mirror defoggers do not operate.	Refer to Diagnosis Procedure.
Rear window defoggers do not operate but both of the door mirror defoggers operate.	Refer to Diagnosis Procedure.
Both door mirror defoggers don’t operate but rear window defoggers operate.	Refer to Diagnosis Procedure.
Driver side door mirror defogger does not operate.	Refer to Diagnosis Procedure.
Passenger side door mirror defogger does not operate.	Refer to Diagnosis Procedure.
Rear window defogger switch does not light, but rear window defogger operates.	Refer to Diagnosis Procedure.
Heated washer nozzles do not operate, but rear window defogger operates.	Refer to Diagnosis Procedure.

Rear Window Defogger and Door Mirror Defogger Do Not Operate. Nissan Pathfinder Fifth generation

Diagnosis Procedure

CHECK REAR WINDOW DEFOGGER SWITCH

Check rear window defogger switch.

Refer to Component Function Check.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace the malfunctioning parts.

CHECK REAR WINDOW DEFOGGER RELAY

Check rear window defogger relay.

Refer to Component Function Check.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace the malfunctioning parts.

CHECK REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT

Check rear window defogger power supply and ground circuit.

Refer to Component Function Check.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace the malfunctioning parts.

CHECK DOOR MIRROR DEFOGGER

Check door mirror defogger.

Refer to Diagnosis Procedure (LH), or Diagnosis Procedure (RH).

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Repair or replace the malfunctioning parts.

Rear Window Defogger Does Not Operate but Both of Door Mirror Defogger Operate. Nissan Pathfinder 2025

Diagnosis Procedure

CHECK REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT

Check rear window defogger power supply and ground circuit.

Refer to Component Function Check.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Repair or replace the malfunctioning parts.

Both Doors Mirror Defogger Dont Operate but Rear Window Defogger Operates Nissan Pathfinder SUV

Diagnosis Procedure

CHECK DOOR MIRROR DEFOGGER FUSE

Check if the following fuse in fuse block (J/B) is blown:

Location	Fuse No.	Capacity
Fuse block (J/B)	2	10 A

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace the blown fuse after repairing the affected circuit.

CHECK DOOR MIRROR DEFOGGER CIRCUIT

1. Ignition switch OFF.

2. Disconnect the following harness connectors:

   • Fuse block (J/B)

   • Door mirror LH

   • Door mirror RH

3. Check continuity between fuse block (J/B) harness connector and door mirror defogger harness connectors.

   Fuse block (J/B)		Door mirror			Continuity
   Connector	Terminal	Connector		Terminal
   B33	5Q	LH	D28	3	Yes
   		RH	D128

4. Check continuity between fuse block (J/B) harness connector and ground.

   Fuse block (J/B)		—	Continuity
   Connector	Terminal
   B33	5Q	Ground	No

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK DOOR MIRROR DEFOGGER

Check door mirror LH.

Refer to Component Function Check.

Check door mirror RH.

Refer to Component Function Check.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Repair or replace the malfunctioning parts.

Driver Side Door Mirror Defogger Does Not Operate. Nissan Pathfinder 5th Gen

Diagnosis Procedure

CHECK DOOR MIRROR DEFOGGER LH

Check door mirror defogger LH.

Refer to Component Function Check.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Repair or replace the malfunctioning parts.

Rear Window Defogger Switch Does Not Light, but Rear Window Defogger Operates Nissan Pathfinder Fifth generation

Diagnosis Procedure

CHECK A/C AND AV SWITCH ASSEMBLY (REAR WINDOW DEFOGGER SWITCH)

Check that A/C and AV switch assembly (rear window defogger switch) is operating normally.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Check rear window defogger switch. Refer to Diagnosis Procedure.

Heated Washer Nozzles Do Not Operate, but Rear Window Defogger Operates Nissan Pathfinder R53

Diagnosis Procedure

CHECK HEATED WASHER NOZZLES FUSE

Check if the following fuse in fuse block (J/B) is blown:

Location	Fuse No.	Capacity
Fuse block (J/B)	3	10 A

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace the blown fuse after repairing the affected circuit.

CHECK HEATED WASHER NOZZLES CIRCUIT

1. Ignition switch OFF.

2. Disconnect the following harness connectors:

   • Fuse block (J/B)

   • Heated washer nozzles

3. Check continuity between fuse block (J/B) harness connector and heated washer nozzles harness connectors.

   Fuse block (J/B)		Heated washer nozzles		Continuity
   Connector	Terminal	Connectors	Terminal
   B33	4Q	E227	1	Yes

4. Check continuity between fuse block (J/B) harness connector and ground.

   Fuse block (J/B)		—	Continuity
   Connector	Terminal
   B33	4Q	Ground	No

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK HEATED WASHER NOZZLES

Check heated washer nozzles. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Repair or replace the malfunctioning parts.