April 5, 2026: LEMON Manuals is launched! Read the announcement.

Door Switch Check

CHECK DOOR SWITCHES INPUT SIGNAL

With CONSULT

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

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

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 Door Switches Input Signal

G04895665

Courtesy of NISSAN NORTH AMERICA, INC.

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.
  2 - Ground: Continuity should not exist .
  
  Fig 2: Checking Door Switch Circuit
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  OK or NG
  
  OK: GO TO 3.
  
  NG: Repair or replace harness.

CHECK DOOR SWITCHES

Check continuity between door switch terminals.

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

Fig 3: Checking Door Switch

G04912708

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: GO TO 4.

NG: Replace door switch.

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 BCM Output Voltage
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  OK or NG
  
  OK: Door switch circuit is OK.
  
  NG: Replace BCM. Refer to , "REMOVAL AND INSTALLATION OF BCM ".