Rear Window Defogger Switch Circuit Check.

With CONSULT-II 

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

1. When rear window defogger switch ON 
2. REAR DEF SW: ON 
   Fig 1: Rear Window Defogger (Multifunction) Switch Inspection With CONSULT-II

   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.
   Fig 2: BCM Connector And Ground Voltage Specifications

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 3: Rear Window Defogger (Multifunction) Switch Inspection Without CONSULT-II

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

   OK or NG

   1. OK: Rear Window defogger switch is OK.
   2. NG: GO TO 2

1. Turn ignition switch OFF.
2. Disconnect BCM and multifunction switch (rear window defogger with) connectors.
3. Check continuity between BCM connector M4 terminal 10 and multifunction switch (rear defogger switch) connector M83 terminal 5.
   1. 10 (G/R) - 5 (G/R): Continuity should exist 
4. Check continuity between BCM harness connector M4 terminal 10 and ground
   1. 10 (G/R) - Ground: Continuity should not exist 

   OK or NG

   1. OK: GO TO 3.
   2. NG: Repair or replace harness between BCM and multifunction switch (rear window defogger switch).

Fig 4: Checking Rear Window Defogger Switch Signal Circuit

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

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

1. 2 (B) - Ground: Continuity should exist 

OK or NG

1. OK: Replace multi function switch.
2. NG: Repair or replace harness between multifunction switch (rear window defogger switch) and ground.

Fig 5: Checking Multifunction (Rear Window Defogger) Switch Ground Harness

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