Check Back Door Switch

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BACK DOOR SWITCH INPUT SIGNAL

With CONSULT-III

Check ("BACK DOOR SW") in "DATA MONITOR" mode with CONSULT-III.

BACK DOOR SWITCH INPUT SIGNAL (WITH CONSULT-III)

Monitor item	Condition	DATA MONITOR
BACK DOOR SW	OPEN ↓ CLOSE	ON ↓ OFF

Without CONSULT-III

Check voltage between BCM connector and ground.

Fig 1: Identifying Voltage Between BCM Connector Ground

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

BACK DOOR SWITCH INPUT SIGNAL (WITHOUT CONSULT-III)

Connector	Terminals (Wire color)		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
B14	58 (L)	Ground	OPEN	0
B14	58 (L)	Ground	CLOSE	9

OK or NG

OK: Back door switch circuit is OK.

NG: GO TO 2.

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.
  58 (L) - 7 (L) : Continuity should exist.
4. Check continuity between BCM connector B14 terminal 58 and ground.
  58 (L) - Ground : Continuity should not exist.
  
  Fig 2: Identifying Continuity Between BCM Connector B14 Terminal 58 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 3.

NG: Repair or replace harness.
CHECK GROUND CIRCUIT
Check continuity between back door closure motor connector D109 terminal 8 and ground.

8 (B) - Ground : Continuity should exist.

Fig 3: Identifying Continuity Between Back Door Closure Motor Connector D109 Terminal 8 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 4.

NG: Repair or replace harness.

CHECK BACK DOOR SWITCH

Check continuity between back door closure motor D109 terminals 7 and 8.

Fig 4: Identifying Continuity Between Back Door Closure Motor D109 Terminals 7 And 8

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

BACK DOOR SWITCH

Terminals		Back door condition	Continuity
7	8	Open	Yes
7	8	Close	No

OK or NG

OK: GO TO 5.

NG: Replace back door closure motor.

CHECK BCM OUTPUT SIGNAL
1. Connect BCM connector.
2. Check voltage between BCM connector and ground.
  58 (L) - Ground : Approx. 9V
  
  Fig 5: Identifying Voltage Between BCM Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Check condition of harness and connector.

NG: Replace BCM.