SEAT BELT WARNING LIGHTSM2760521
SEAT BELT WARNING LIGHT

id092200022900


Purpose

• The seat belt warning light warns the driver that a seat belt is not fastened.

Function

• The instrument cluster flashes/turns on the seat belt warning light based on the following signals:

Signal name

Sending module/part name

Communication method

Vehicle speed signal
PCM
HS-CAN
Driver's side/passenger's side buckle switch signal
SAS control module
Passenger seat status signal
Occupant classification sensor
Rear buckle switch signal (with rear seat belt warning light)
Rear body control module (BCM)
MS-CAN


Driver's side/passenger's side seat belt warning light display function

• The driver's side/passenger's side seat belt warning light has a warning for when the vehicle is stopped, while the vehicle is being driven, and subsequent warnings while the vehicle is being driven.
Warning while vehicle is stopped
• When all of the following conditions are met, the light turns on.
― Ignition is switched ON (engine off or on)
― Driver's side/passenger's side buckle switch on signal (seat belt unfastened) is detected
― Occupancy sensor on signal (occupant in passenger seat) is detected (passenger's side seat belt warning light only)
Warning while vehicle is driven
• When all of the following conditions are met, the light flashes/turns on.
― Vehicle speed is 20 km/h {12 mph} or more
― Driver's side/passenger's side buckle switch on signal (seat belt unfastened) is detected
― Occupancy sensor on signal (occupant in passenger seat) is detected (passenger's side seat belt warning light only)
• The warning while vehicle is driven flashes/turns on in the pattern shown in the figure.
am2zzn00004343
Subsequent warning while vehicle is driven
• When all of the following conditions are met, the light flashes/turns on.
― Vehicle speed is 20 km/h {12 mph} or more
― Occupancy sensor on signal (occupant in passenger seat) is detected (passenger's side seat belt warning light only)
― After warning while vehicle is being driven operates, buckle switch off signal (seat belt fastened) to on signal (seat belt unfastened) is detected
• The subsequent warning while vehicle is driven flashes/turns on in the pattern shown in the figure.
am2zzn00004344


Rear seat belt warning light display function (with rear seat belt warning light)

• The rear seat belt warning light illuminates in green to indicate seat belts are fastened, and it illuminates in red to indicate a seat belt is not fastened.
• The rear seat belt warning light has an initial warning and a subsequent warnings.
Initial warning
― When the ignition is switched ON (engine off or on), it illuminates for approx. 33 s.
Subsequent warning
― When the following conditions are met, the light flashes.
• When the fastened seat belt is unfastened
• Rear buckle switch on signal (seat belt unfastened) is detected


Construction

• The driver's side seat belt warning light is built into the instrument cluster.
am2zzn00004345
• The passenger's side seat belt warning light is built into the indicator unit. For details on the passenger's side seat belt warning light, refer to [INDICATOR UNIT]. (See INDICATOR UNIT.)

Operation


Driver's side seat belt warning light

1.When the ignition is switched ON (engine off or on), the instrument cluster receives (1) a vehicle speed signal from the PCM, driver's side buckle switch signal from the SAS control module via CAN communication.

2.The instrument cluster turns the transistor on (2) intermittently for flashing and continuously for illumination based on each signal.

3.When the transistor turns on intermittently, the driver's side seat belt warning light flashes (3), when it turns on continuously, the driver's side seat belt warning light turns on (3).

am2zzn00004346


Passenger's side seat belt warning light

• For the passenger's side seat belt warning light operation, refer to [INDICATOR UNIT]. (See INDICATOR UNIT.)


Rear seat belt warning light (with rear seat belt warning light)

• For the rear seat belt warning light operation, refer to [INDICATOR UNIT]. (See INDICATOR UNIT.)


Fail-safe

• Not applicable