Nissan Altima 2007-2012 Service Manual: Seat belt warning chime

System Diagram

System Description

DESCRIPTION

With ignition switch turned ON and driver seat belt unfastened, seat belt warning chime will sound for approximately 6 seconds.

• BCM receives seat belt buckle switch signal from combination meter with CAN communication line.

• BCM detects ignition switch turned ON and seat belt buckle switch LH ON. And then transmits buzzer output signal (seat belt warning chime) to combination meter with CAN communication line.

• When combination meter receives buzzer output signal (seat belt warning chime), it sounds the buzzer.

WARNING OPERATION CONDITIONS

If all of the following conditions are fulfilled

• Ignition switch OFF→ON

• Seat buckle switch LH is ON (driver seat belt not fastened)

WARNING CANCEL CONDITIONS

Cancels the warning if any of the following conditions is fulfilled.

• Ignition switch OFF

• Seat buckle switch LH is OFF (driver seat belt fastened)

• 90 seconds have passed since the start of the warning

Component Parts Location

1. Combination meter M24

2. Combination switch (lighting switch) M28

3. Seat belt buckle switch LH B202

4. Door switch LH B8

5. BCM M16, M17, M18, M19 (view with instrument panel removed)

6. ABS actuator and electric unit (control unit) E26

7. Parking brake switch M73 (sedan with M/T or coupe) (view with center console removed)

8. Parking brake switch E35 (sedan with CVT) [view with instrument panel lower cover (LH) removed]

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