Check Rear Window Defogger Switch Circuit.

With CONSULT-II 

Check rear window defogger switch "REAR DEF SW" in the "DATA MONITOR" mode with CONSULT-II, Refer to , "DATA MONITOR ".

When rear window defogger switch ON 

REAR DEF SW: ON 

Fig 1: Consult-II Display - Data Monitor

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

With out CONSULT-II 

1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.
   CONNECTOR SPECIFICATION CHART
   
   

   Connector	Terminal (Wire color)		Condition of rear window defogger switch	Voltage [V] (Approx)
   	(+)	(-)
   M4	10 (BR)	Ground	ON	0
   			OFF	5

   Fig 2: Checking Voltage Between BCM Connector And Ground

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

OK or NG 

• OK: Rear window defogger switch is OK.
• NG: GO TO 2

1. Turn ignition switch OFF.
2. Disconnect BCM and multifunction switch (rear window defogger switch) connectors.
3. Check continuity between BCM connector M4 terminal 10 and multifunction switch (rear window defogger switch) connector M83 terminal 5.

   10 (BR) - 5 (BR): Continuity should exist 

   Fig 3: Checking Rear Window Defogger Switch Signal Circuit

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between BCM harness connector M4 terminal 10 and ground

   10 (BR) - Ground: Continuity should not exist 

OK or NG 

• OK: GO TO 3.
• NG: Repair or replace harness.

Check continuity between multi-function switch (rear window defogger switch) connector M83 terminal 2 and ground.

2 (B) - Ground: Continuity should exist 

Fig 4: Checking Continuity Between Multi-Function Switch (Rear Window Defogger Switch) Connector M83 Terminal 2 And Ground

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

OK or NG 

• OK: Replace multi function switch.
• NG: Repair or replace harness.