Seat Belt Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2005 Nissan Frontier. 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
1. Turn ignition switch ON.
2. Buckle and unbuckle the driver seat belt while watching seat belt warning lamp.
  When seat belt is fastened: Warning lamp OFF
  
  When seat belt is unfastened: Warning lamp ON
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 24 and ground.

VOLTAGE CHECK CONDITION

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

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 B12.

Check continuity between seat belt buckle switch LH terminals 1 and 2.

CONTINUITY CHECK 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.

Fig 2: Checking Continuity Between Seat Belt Buckle Switch LH 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 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
1. OK: Check seat belt buckle switch ground circuit.
2. NG: Repair harness or connector.
  
  Fig 3: Checking Continuity Between Combination Meter Connector M24 Terminal 24 And Seat Belt Buckle Switch LH Connector B12 Terminal 1
  Courtesy of NISSAN MOTOR CO., U.S.A.