Seat Belt Warning Chime Does Not Operate

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WARNING CHIME OPERATION
Check the chime under conditions in exception of seat belt warning chime operation.

Does warning chime sound?
- YES : GO TO 2.
- NO : Go to "ALL WARNINGS ARE NOT OPERATED ".
CHECK BCM INPUT SIGNAL
1. Select "BCM" on CONSULT-II.
2. With "DATA MONITOR" of "BUZZER", confirm "SEAT BELT SW" when the seat belt buckle switch is operated.
  - "SEAT BELT SW"
  - When seat belt is fastened : OFF
  - When seat belt is unfastened : ON
OK or NG
- OK : Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
- NG : GO TO 3.
Fig 1: Scan Tool Display "Data Monitor"
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between combination meter harness connector M19 terminal 1 (BR/Y) and ground.
  - 1 (BR/Y) - Ground
  - When seat belt is fastened : Approx. 12 V
  - When seat belt is unfastened : Approx. 0 V
OK or NG
- OK : Replace combination meter.
- NG : GO TO 4.
Fig 2: Combination Meter Harness Connector M19 Terminal 1 (BR/Y) & Ground Voltage Test
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK SEAT BELT BUCKLE SWITCH
1. Turn ignition switch OFF.
2. Disconnect seat belt buckle switch (driver side) connector.
3. Check continuity between seat belt buckle switch (driver side) harness connector B8 terminals 1 and 2.
  - 1 - 2
  - When seat belt is fastened : Continuity should not exist.
  - When seat belt is unfastened : Continuity should exist.
  Fig 3: Seat Belt Buckle Switch (Driver Side) Harness Connector B8 Terminals 1 & 2 Continuity Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK : GO TO 5.
- NG : Replace seat belt buckle switch (driver side).
CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
1. Disconnect combination meter connector.
2. Check harness continuity between combination meter harness connector M19 terminal 1 (BR/Y) and seat belt buckle switch (driver side) harness connector B8 terminal 1 (BR).
  - 1 (BR/Y) - 1 (BR) : Continuity should exist.
3. Check harness continuity between combination meter harness connector M19 terminal (BR/Y) and ground.
  - 1 (BR/Y) - Ground : Continuity should not exist.
  Fig 4: Combination Meter Harness Connector M19 Terminal 1 (BR/Y) & Seat Belt Buckle Switch (Driver Side) Harness Connector B8 Terminal 1 (BR) & Ground Continuity Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK : Check seat belt buckle switch ground circuit.
- NG : Repair harness or connector