Check rear Window Defogger Power Supply Circuit

CHECK FUSE
- Check 10A fuse [No.12, located in the 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

OK : GO TO 2.

NG : If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse, refer to "POWER SUPPLY ROUTING CIRCUIT ".
CHECK POWER SUPPLY 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 E13 terminals 1, 3, 6 and ground.
  1 (OR) - Ground : Battery voltage
  
  3 (W) - Ground : Battery voltage
  
  6 (R) - Ground : Battery voltage
  
  Fig 1: Identifying Voltage Between Rear Window Defogger Relay Connector E13 Terminals 1, 3, 6 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 3.

NG : Repair or replace harness.

CHECK REAR WINDOW DEFOGGER RELAY

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

TERMINALS CONTINUITY CHART

Terminal		Condition	Continuity
3	5	12V direct current supply between terminals 1 and 2	Yes
3	5	No current supply	No
6	7	12V direct current supply between terminals 1 and 2	Yes
6	7	No current supply	No

Fig 2: Identifying Continuity Between Rear Window Defogger Terminals 3 And 5, 6 And 7

G04077437

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

OK or NG

OK : GO TO 4.

NG : Replace rear window defogger relay.

CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT

Turn ignition switch OFF.
Installation rear window defogger relay.
Turn ignition switch ON.

Check voltage between IPDM E/R connector and ground.

TERMINALS VOLTAGE CHART

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

Fig 3: Identifying Voltage Between IPDM E/R Connector Terminal 52 And Ground

G04077438

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

OK or NG

OK : Rear window defogger power supply circuit is OK.

NG : GO TO 5.

CHECK HARNESS CONTINUITY
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.
  52 (G) - 2 (G) : Continuity should exist.
  
  Fig 4: Identifying Continuity Between IPDM E/R Terminal 52 And Rear Window Defogger Relay Terminal 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 6.

NG : Repair or replace harness.
CHECK REAR WINDOW DEFOGGER RELAY OUTPUT SIGNAL
1. Connect IPDM E/R connector and rear window defogger relay.
2. Turn ignition switch ON.
3. Check voltage between IPDM E/R connector E9 terminal 52 and ground.
  52 (G) - Ground : Battery voltage
  
  Fig 5: Identifying Voltage Between IPDM E/R Connector E9 Terminal 52 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : Check condition of harness and connector.

NG : Replace IPDM E/R.