Seat Belt Reminder Lamp: Description and Operation
SEAT BELT WARNING LIGHT
GENERAL DESCRIPTION CONCERNING THE SEAT BELT WARNING LIGHT
The ECU related to the seat belt warning light function is as follows.
Seat Belt Warning Light Function:

SEAT BELT WARNING LIGHT FUNCTION
If any of the following conditions is met with the ignition switch at "ON" or "ST", the ETACS-ECU illuminates or extinguishes the seat belt indicator by using the driver's seat belt switch signal and the vehicle
speed signal.
- The seat belt switch is turned on (driver's seatbelt is not fastened) with IG1 at "ON" or "ST".
- Flashes the indicator 11 cycles (after 0.5 seconds) if any of the following conditions is met when sixty seconds or more have elapsed since IG1 is turned "ON", and then illuminates it for 8 seconds. One cycle consists of five-second "on" and then three-second "off".
a. The vehicle speed has reached 8 km/h (5 mph) while the seat belt switch is turned on (driver's seat belt is not fastened) with IG1 switch "ON.
b. The seat belt switch has been turned on (driver's seat belt has not been fastened) for at least ten seconds while IG1 has been turned "ON" and the vehicle speed has been 8 km/h (5 mph) or more.
NOTE: Once this timer operation has been activated, it will not be activated again until the vehicle speed reduces to 3 km/h (2 mph) or less.
- The indicator stops illuminating if IG1 or the seatbelt switch is turned off (the driver's seat belt is fastened) while the timer operation is active.