Rear Window Defogger Switch Circuit Check

With CONSULT-II

Check ("REAR DEF SW", "IGN ON SW") in DATA MONITOR mode with CONSULT-II.

1. When rear window defogger switch is turned to ON 
2. REAR DEF SW: ON 
3. When ignition switch is turned to ON 
4. IGN ON SW: ON 
   Fig 1: CONSULT-II - Identifying "REAR DEF SW" And "IGN ON SW"

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

Without CONSULT-II

1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.
   Fig 2: Rear Window Defogger Switch Connector M18 Terminal 9 Voltage Specification

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

OK or NG

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

Fig 3: Checking Voltage Between BCM Connector And Ground

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

1. Turn ignition switch OFF.
2. Disconnect BCM and front air control.
3. Check continuity between BCM connector M18 terminal 9 and front air control connector M49 terminal 11.
   1. 9 (Y/B) - 11 (Y/B): Continuity should exist. 
4. Check continuity between BCM connector M18 terminal 9 and ground
   1. 9 (Y/B) - Ground: Continuity should not exist. 

OK or NG

1. OK: GO TO 3.
2. NG: Repair or replace harness.

Fig 4: Checking Continuity Between BCM Connector M18 Terminal 9 And Front Air Control Connector M49 Terminal 11

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

1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M18 terminal 9 and ground.
   1. 9 (Y/B) - Ground: Approx. 5 

OK or NG

1. OK: Replace front air control. Refer to "FRONT AIR CONTROL ".
2. NG: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".

Fig 5: Checking Voltage Between BCM Connector M18 Terminal 9 And Ground

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