Open Switch Check

1. Turn ignition switch OFF.
2. Check the signal between back door closure control unit connector and ground with oscilloscope.
   Fig 1: Connector Terminal Reference Chart

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

OK or NG 

1. OK : Open switch is OK.
2. NG : GO TO 2.

Fig 2: Checking Signal Between Back Door Closure Control Unit Connector And Ground With Oscilloscope

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

1. Disconnect back door closure control unit and back door closure motor connector.
2. Check continuity between back door closure control unit connector D106 terminal 9 and back door closure motor connector D109 terminal 4.
   1. 9 (P) - 4 (P) : Continuity should exist. 
3. Check continuity between back door closure control unit connector D106 terminal 9 and ground.
   1. 9 (P) - Ground : Continuity should not exist. 

OK or NG 

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

Fig 3: Checking Continuity Between Back Door Closure Control Unit Connector D106 Terminal 9 And Ground

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

Check continuity between back door closure motor connector D109 terminal 8 and ground.

1. 8 (B) - Ground : Continuity should exist. 

OK or NG 

1. OK : GO TO 4. 
2. NG : Repair or replace harness. 

Fig 4: Checking Continuity Between Back Door Closure Motor Connector D109 Terminal 8 And Ground

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

1. Connect back door closure control unit connector.
2. Check voltage between back door closure control unit connector D106 terminal 9 and ground.
   1. Back door is closed 
   2. 9 (P) - Ground : Battery voltage 

OK or NG 

1. OK : Replace back door lock assembly. 
2. NG : Replace back door closure control unit. 

Fig 5: Checking Voltage Between Back Door Closure Control Unit Connector D106 Terminal 9 And Ground

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