Door Switch Check

CHECK DOOR SWITCHES INPUT SIGNAL

With CONSULT-III

Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR") in DATA MONITOR mode with CONSULT-III. Refer to "CONSULT-III FUNCTION (BCM) ".

When any doors are open:
DOOR SW-DR : ON

DOOR SW-AS : ON

DOOR SW-RL : ON

DOOR SW-RR : ON
When any doors are closed:
DOOR SW-DR : OFF

DOOR SW-AS : OFF

DOOR SW-RL : OFF

DOOR SW-RR : OFF

Without CONSULT-III

Check voltage between BCM connector M18 or M19 terminals 12, 13, 47, 48 and ground.

VOLTAGE SPECIFICATION

Connector	Item	Terminals		Condition	Voltage (V) (Approx.)
Connector	Item	(+)	(-)	Condition	Voltage (V) (Approx.)
M19	Front door switch LH	47	Ground	Open ↓ Closed	0 ↓ Battery voltage
M19	Rear door switch LH	48
M18	Front door switch RH	12
M18	Rear door switch RH	13

Fig 1: Checking Voltage Between BCM Connector M18, M19 Terminals 12, 13, 47, 48 And Ground

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

OK or NG

OK: Door switch circuit is OK.

NG: GO TO 2.

CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between door switch connector B21 (Front LH), B28 (Front RH), B26 (Rear LH), B41 (Rear RH) terminal 2 and BCM connector M18, M19 terminals 12, 13, 47 and 48.
  2 - 47 : Continuity should exist.
  
  2 - 12 : Continuity should exist.
  
  2 - 48 : Continuity should exist.
  
  2 - 13 : Continuity should exist.
4. Check continuity between door switch connector B21 (Front LH), B28 (Front RH), B26 (Rear LH), B41 (Rear RH) terminal 2 and ground.
  
  Fig 2: Checking Continuity Between Door Switch Connector B21, B28, B26, B41, Terminal 2 And BCM Connector M18, M19 Terminals 12, 13, 47 And 48
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  2 - Ground : Continuity should not exist.
  
  OK or NG
  
  OK: GO TO 3.
  
  NG: Repair or replace harness.

CHECK DOOR SWITCHES

Check continuity between door switch terminals.

CONTINUITY CHART

Door switch (front or rear)	Terminals	Condition	Continuity
	2 - Ground	Pressed	No
	2 - Ground	Released	Yes

OK or NG

OK: GO TO 4.

NG: Replace door switch.

Fig 3: Checking Continuity Between Door Switch Terminals

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

CHECK BCM OUTPUT VOLTAGE
1. Reconnect BCM connectors.
2. Check voltage between BCM connector M18, M19 terminals 12, 13, 47, 48 and ground.
  12 - Ground : Battery voltage
  
  13 - Ground : Battery voltage
  
  47 - Ground : Battery voltage
  
  48 - Ground : Battery voltage
  
  Fig 4: Checking Voltage Between BCM Connector M18, M19 Terminals 12, 13, 47, 48 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  
  OK: Door switch circuit is OK.
  
  NG: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".