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Home >> Lexus >> 2012 >> LS 460 AWD V8-4.6L (1UR-FSE) >> Repair and Diagnosis >> Restraints and Safety Systems >> Seat Belt Systems >> Description and Operation >> Seat Belt Warning System >> System Description

System Description





SEAT BELT: SEAT BELT WARNING SYSTEM: SYSTEM DESCRIPTION

1. SEAT BELT WARNING SYSTEM DESCRIPTION

If a seat belt is not fastened, this system flashes the seat belt warning light or sounds the seat belt warning buzzer as a reminder.

(a) Driver side seat belt warning light:

When the driver seat belt is not fastened with the engine switch on (IG), the driver side seat belt warning light on the No. 1 meter ECU comes on to inform the driver. The center airbag sensor detects the driver seat belt status and sends signals to the No. 1 meter ECU using CAN.

(b) Front passenger side seat belt warning light:

When the passenger seat belt is not fastened with the engine switch on (IG) and the passenger seat occupied, check that the passenger side seat belt warning light on the integration control and panel*1 (display and navigation module display*2) blinks. The No. 1 meter ECU displays the passenger seat belt status and whether the passenger seat is occupied.

(c) Seat belt warning buzzer:

When the vehicle is driven at approximately 25 km/h (16 mph) or more while the driver or front passenger seat belt is not being fastened, the seat belt warning buzzer in the No. 1 meter ECU sounds at an interval of 1.2 seconds for 30 seconds.

2. FUNCTION OF MAIN COMPONENT

The following functions are available.





* *1: w/o Multi-display

* *2: w/ Multi-display

3. SYSTEM OPERATION

(a) Driver side seat belt warning light

(1) When the driver seat belt is not fastened with the engine switch on (IG), the driver side seat belt warning light on the No. 1 meter ECU comes on to inform the driver. The center airbag sensor detects the driver seat belt status and sends signals to the No. 1 meter ECU using CAN.

(b) Front passenger side seat belt warning light

(1) When the passenger seat belt is not fastened with the engine switch on (IG) and the passenger seat occupied, check that the front passenger side seat belt warning light on the integration control and panel*1 (display and navigation module display*2) blinks. The No. 1 meter ECU displays the passenger seat belt status and whether the passenger seat is occupied.

* *1: w/o Multi-display

* *2: w/ Multi-display
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