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: Data Monitor - Display

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With CONSULT-II 

1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.
   Fig 2: Terminal Wire Color Specification

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   Fig 3: Checking Voltage Between BCM Connector And Ground

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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 switch) connectors.
3. Check continuity between BCM connector M4 terminal 10 and multifunction switch (rear window 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.

Fig 4: Inspecting 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.

Fig 5: Checking Continuity Between Multi-Function Switch (Rear Window Defogger Switch) Connector M83 Terminal 2 And Ground

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