Seat Belt Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2004 Nissan Maxima. 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 BCM INPUT SIGNAL
With "SEAT BELT ALM" on the data monitor, confirm "SEAT BELT SW" when the seat belt buckle switch is operated.
1. Select "METER A/C AMP".
2. With "DATA MONITOR" of "METER A/C AMP", confirm "SEAT BELT W/L" status changes with the operation of the seat belt.
When seat belt is fastened: SEAT BELT W/L OFF

When seat belt is unfastened: SEAT BELT W/L ON

Fig 1: Data Monitor Display
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.
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 1 (O) and ground.

CONNECTOR TERMINALS VOLTAGE CONDITION

Terminals			Condition	Voltage (V) (Approx.)
(+)		(-)
Connector	Terminal
M24	1(O)	Ground	Seat belt is fastened	Battery voltage
			Seat belt is unfastened	0

Fig 2: Checking Combination Meter Input Signal

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

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.

Fig 3: Checking Seat Belt Buckle Switch
Courtesy of NISSAN MOTOR CO., U.S.A.

CONNECTOR TERMINALS CONTINUITY CONDITION

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

OK or NG

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

CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
1. Disconnect combination meter connector.
2. Check continuity between combination meter harness connector M24 terminal 1 (O) and seat belt buckle switch LH harness connector B12 terminal 1 (O).
  Continuity should exist.
3. Check continuity between combination meter harness connector M24 terminal 1 (O) and ground.
Continuity should not exist.

Fig 4: Checking Seat Belt Buckle Switch Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: Check seat belt buckle switch ground circuit.
2. NG: Repair harness or connector.