Seat Belt Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WARNING CHIME OPERATION
1. With key removed from the ignition and the front door LH open, turn the lighting switch to 1st or 2nd position.
2. Return lighting switch to OFF position, and insert key into ignition.
Does warning chime sound for both steps?
1. YES: GO TO 2.
2. NO: Go to ALL WARNING CHIMES DO NOT OPERATE .
CHECK SEAT BELT WARNING LAMP OPERATION
Turn ignition switch ON. Buckle and unbuckle driver seat belt while watching seat belt warning lamp.
1. When seat belt is fastened: Warning lamp OFF
2. When seat belt is unfastened: Warning lamp ON
Fig 1: Data Monitor Display (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: Replace the BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
2. NG: GO TO 3.

CHECK COMBINATION METER INPUT SIGNAL

Turn ignition switch ON.
Check voltage between combination meter harness connector M24 terminal 4 (W/L) and ground.

Fig 2: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 4 (W/L) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

VOLTAGE CHART

Terminals			Condition	Voltage (V) (Approx.)
(+)		(-)
Connector	Terminal
M24	4 (W/L)	Ground	Seat belt is fastened	Battery voltage
			Seat belt is unfastened	0

OK or NG

OK: Replace the combination meter. Refer to REMOVAL AND INSTALLATION OF COMBINATION METER
NG: GO TO 4.

CHECK SEAT BELT BUCKLE SWITCH

Turn ignition switch OFF.
Disconnect seat belt buckle switch LH connector.
Check continuity between seat belt buckle switch LH harness connector B12 terminals 1 and 2.

CONTINUITY CHART

Terminals		Condition	Continuity
1	2	Seat belt is fastened	Yes
1	2	Seat belt is unfastened	No

OK or NG

OK: GO TO 5.
NG: Replace the seat belt buckle switch LH.

Fig 3: Checking Continuity Between Seat Belt Buckle Switch LH Harness Connector B12 Terminals 1 And 2
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
1. Disconnect combination meter connector.
2. Check continuity between combination meter harness connector M24 terminal 4 (W/L) and seat belt buckle switch LH harness connector B12 terminal 1 (O).
  1. Continuity should exist.
3. Check continuity between combination meter harness connector M24 terminal 4 (W/L) and ground.
  1. Continuity should not exist.
  OK or NG
  1. OK: Check seat belt buckle switch ground circuit.
  2. NG: Repair harness or connector.
  Fig 4: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 4 (W/L) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.