Rear Window Defogger Circuit Check

Check if any of the following fuses for IPDM E/R are blown.

OK or NG 

• OK: GO TO 2.
• NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) ".

1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger connector D404 terminal + and ground.
   CONNECTOR TERMINAL CONDITION VOLTAGE CHART
   
   

   Connector	Terminals		Condition	Voltage (V) (Approx.)
   	(+)	(-)
   D404	+	Ground	Rear window defogger switch ON.	Battery voltage
   			Rear window defogger switch OFF.	0

OK or NG 

• OK: GO TO 3.
• NG: GO TO  4.
  Fig 1: Checking Rear Window Defogger Power Supply Circuit

  Courtesy of NISSAN MOTOR CO., U.S.A.

1. Turn ignition switch OFF.
2. Check continuity between rear window defogger connector D604 terminal - and ground.

   - Ground: Continuity should exist. 

OK or NG 

• OK: Check filament. Refer to "FILAMENT CHECK ".
  • If filament is OK.

    Check the condition of the harness and the connector.

  • If filament is NG.

    Repair filament.

• NG: Repair or replace harness.
  Fig 2: Checking Rear Window Defogger Ground Circuit

  Courtesy of NISSAN MOTOR CO., U.S.A.

Check voltage between IPDM E/R and ground.

OK or NG 

• OK: Repair or replace harness.
• NG: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".
  Fig 3: Checking Voltage Between IP DM E/R And Ground

  Courtesy of NISSAN MOTOR CO., U.S.A.