Check Back Door Switch

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BACK DOOR SWITCH INPUT SIGNAL
Check voltage between BCM connector and ground.

Fig 1: Connector Terminal Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : Back door switch circuit is OK.
2. NG : GO TO 2.
Fig 2: Checking Voltage Between BCM Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and back door closure motor connector.
3. Check continuity between BCM connector B14 terminal 58 and back door closure motor connector D109 terminal 7.
  1. 58 (L) - 7 (L) : Continuity should exist.
4. Check continuity between BCM connector B14 terminal 58 and ground.
  1. 58 (L) - Ground : Continuity should not exist.
OK or NG
1. OK : GO TO 3.
2. NG : Repair or replace harness.
Fig 3: Checking Continuity Between BCM Connector B14 Terminal 58 And Back Door Closure Motor Connector D109 Terminal 7
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND CIRCUIT
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.
CHECK BACK DOOR SWITCH
Check continuity between back door closure motor D109 terminals 7 and 8.

Fig 5: Connector Terminal Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : GO TO 5.
2. NG : Replace back door closure motor.
Fig 6: Checking Continuity Between Back Door Closure Motor D109 Terminals 7 And 8
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK BCM OUTPUT SIGNAL
1. Connect BCM connector.
2. Check voltage between BCM connector and ground.
  1. 58 (L) - Ground : Approx. 9V
OK or NG
1. OK : Check condition of harness and connector.
2. NG : Replace BCM.
Fig 7: Checking Voltage Between BCM Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.