Rear Window Defogger Power Supply Circuit Check

• Check 10A fuse [No. 12, located in fuse block (J/B)]
• Check 20A fuse (No.75, located in the IPDM E/R)
• Check 20A fuse (No.80, located in the IPDM E/R)
  NOTE: Refer to COMPONENT PARTS AND HARNESS CONNECTOR LOCATION  .

  OK or NG

1. OK: GO TO 2.
2. NG: If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse, refer to POWER SUPPLY ROUTING CIRCUIT.

1. Turn ignition switch OFF.
2. Remove rear window defogger relay.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger relay connector and ground.
   Fig 1: Checking Rear Window Defogger Power Supply Circuit

   Courtesy of NISSAN MOTOR CO., U.S.A.
   REAR WINDOW DEFOGGER RELAY VOLTAGE
   
   

   Connector	Terminals (Wire color)		Voltage (V) (Approx.)
   	(+)	(-)
   E13	1 (OR)	Ground	Battery voltage
   	3(W)
   	6(R)

OK or NG

1. OK: GO TO 3.
2. NG: Repair or replace harness between fuse block (J/B) and rear window defogger relay.

Fig 2: Checking Rear Window Defogger Relay

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

Check continuity between rear window defogger terminals 3 and 5, 6 and 7.

OK or NG

1. OK: GO TO 4.
2. NG: Replace rear window defogger relay.

1. Turn ignition switch OFF.
2. Installation rear window defogger relay.
3. Turn ignition switch ON.
4. Check voltage between IPDM E/R connector and ground.
   Fig 3: Checking Rear Window Defogger Relay Ground Circuit

   Courtesy of NISSAN MOTOR CO., U.S.A.
   REAR WINDOW DEFOGGER VOLTAGE
   
   

   Connector	Terminals (Wire color)		Condition	Voltage (V) (Approx.)
   	(+)	(-)
   E9	52 (G)	Ground	When rear window defogger switch ON	0
   			When rear window defogger switch OFF	Battery voltage

OK or NG

1. OK: Rear window defogger power supply circuit is OK.
2. NG: GO TO 5.

1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and rear window defogger relay.
3. Check continuity between IPDM E/R connector E9 terminal 52 and rear window defogger relay connector E13 terminal 2.
   Fig 4: Checking Rear Window Defogger Harness Continuity

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

   52 (G) - 2 (G): Continuity should exist. 

OK or NG

1. OK: GO TO 6.
2. NG: Repair or replace harness between IPDM E/R and rear window defogger relay.

1. Connect IPDM E/R and rear window defogger relay.
2. Turn ignition switch ON.
3. Check voltage between IPDM E/R connector E9 terminal 52 and ground.
   Fig 5: Checking Rear Window Defogger Output Signal

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

   52 (G) - Ground: Battery voltage 

OK or NG

1. OK: Replace IPDM E/R.
2. NG: Check condition of harness and connector.