Seat Belt Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2007 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?

Yes: GO TO 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.

NOTE: While performing this test, the front passenger seat must be unoccupied.

When seat belt is fastened : Warning lamp OFF

When seat belt is unfastened : Warning lamp ON

OK or NG

OK: Replace the BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".

NG: GO TO 3.

CHECK COMBINATION METER INPUT SIGNAL

Check voltage between combination meter harness connector M24 terminal 24 and ground.

VOLTAGE CHART

Terminals			Condition	Voltage (V) (Approx.)
(+)		(-)
Connector	Terminal	(-)
M24	24	Ground	Seat belt is fastened	Battery voltage
M24	24	Ground	Seat belt is unfastened	0

Fig 1: Checking Voltage Between Combination Meter Harness Connector M24 Terminal 24 And Ground

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

OK or NG

OK: Replace the combination meter. Refer to "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 terminals 1 and 2.

CONTINUITY REFERENCE CHART

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

Fig 2: Checking Continuity Between Seat Belt Buckle Switch LH Terminals 1 And 2

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

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 24 and seat belt buckle switch LH harness connector B12 terminal 1.
  Continuity should exist.
3. Check continuity between combination meter harness connector M24 terminal 24 and ground.
  Continuity should not exist.
OK or NG

OK: Check seat belt buckle switch ground circuit.

NG: Repair harness or connector.

Fig 3: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 24 And Seat Belt Buckle Switch LH Harness Connector B12 Terminal 1, And Between Connector M24 Terminal 24 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.