Seat Belt Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2008 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?

YES: GO TO 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 LH 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 LH is fastened: SEAT BELT W/L OFF
  
  When seat belt LH is unfastened: SEAT BELT W/L ON
OK or NG

OK: Replace the BCM. Refer to "BCM ".

NG: GO TO 3.

CHECK COMBINATION METER INPUT SIGNAL

Turn ignition switch ON.

Check voltage between combination meter harness connector M24 terminal 1 and ground.

COMBINATION METER INPUT SIGNAL

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

Fig 1: Checking Voltage Between Combination Meter Connector M24 Terminal 1 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.

SEAT BELT BUCKLE SWITCH

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 1 and seat belt buckle switch LH harness connector B403 terminal 1.
  Continuity should exist.
3. Check continuity between combination meter harness connector M24 terminal 1 and ground.
  Continuity should not exist.
Fig 3: Checking Continuity Between Combination Meter Harness Connector M24 Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Check seat belt buckle switch LH ground circuit.

NG: Repair harness or connector.