Rear Window Defogger Circuit Inspection

Check if any of the following fuses in 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.

1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger connector and ground.

   Connector	Terminals		Condition	Voltage (V) (Approx.)
   	(+)	(-)
   B50	1	Ground	Rear window defogger switch ON	Battery voltage
   			Rear window defogger switch OFF	0

   Fig 1: Checking Rear Window Defogger Power Supply Circuit

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: GO TO 3.

   NG: GO TO  4.

1. Turn ignition switch OFF.
2. Check continuity between rear window defogger connector B63 terminal 2 and ground.

   2 - Ground: Continuity should exist  .

   Fig 2: Checking Rear Window Defogger Ground Circuit

   Courtesy of NISSAN NORTH AMERICA, INC.

   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. Refer to , "FILAMENT REPAIR ".

   NG: Repair or replace harness.

1. Disconnect IPDM E/R.
2. Check continuity between rear window defogger connector (A) and IPDM E/R connector (B).

   A		B		Continuity
   Connector	Terminal	Connector	Terminal
   B50	1	E48	60	Yes

3. Check continuity between rear window defogger connector (A) and ground.

   A		Ground	Continuity
   Connector	Terminal
   B50	1		No

   Fig 3: Checking Harness Continuity

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: GO TO 5.

   NG: Repair or replace harness.

1. Connect IPDM E/R.
2. Turn ignition switch ON.
3. Check voltage between IPDM E/R connector and ground.

   Connector	Terminals		Condition	Voltage (V) (Approx.)
   	(+)	(-)
   E48	60	Ground	Rear window defogger switch ON	Battery voltage
   			Rear window defogger switch OFF	0

   Fig 4: Checking Rear Window Defogger Relay Output Signal

   Courtesy of NISSAN NORTH AMERICA, INC.

   OK or NG 

   OK: Check condition of harness and connector.

   NG: Replace IPDM E/R. Refer to , "REMOVAL AND INSTALLATION OF IPDM E/R ".