Seat Belt Systems: Description and Operation

SEAT BELT SYSTEM DESCRIPTION AND OPERATION

CAUTION: Replace belts, retractors, and hardware In use in ail but a minor collision. Also, restraint systems should be replaced and anchorages properly repaired if they were in areas damaged by a collision, whether the belt was in use or not. If there Is any question, replace the belt system. Damage, whether visible or not, could result In serious personal injury in the event Of an accident.

1. The seat belt system includes a driver and/or passenger seat belt retractor and buckle.
2. The driver's seat belt system, includes a seat belt switch in the driver seat belt buckle which sends a signal to the audio alarm module. When the driver seat belt is buckled, the driver's door is closed, and the ignition is ON, the following events will occur:
^ The audio alarm will not operate.
^ The fasten safety belts indicator will not operate.
3. When the driver's seat belt is unbuckled, the driver's door is closed, and the ignition is ON, the following events will occur:
^ The audio alarm will operate for 4 to 8 seconds and then go OFF.
^ The fasten safety belts indicator will operate for 20 seconds, until the driver seat belt is buckled.
^ The fasten safety belts indicator will flash for an additional 55 seconds before going OFF. To diagnose a failure of the fasten safety belts indicator or audio alarm, refer to Symptoms - Seat Belts and Symptoms in Instrument Panel, Gauges and Warning Indicators. Testing and Inspection

SAFETY BELT INDICATOR
The audio alarm module generates a fasten safety belts warning for 4 to 8 seconds and illuminates the fasten safety belts indicator when both of the following conditions occur:
^ The ignition is ON.
^ The driver seat belt is unbuckled.

When the ignition is ON, voltage is applied to the audio alarm module ignition 1 voltage input. With the driver seat belt unbuckled, ground is applied to the audio alarm module through the seat belt switch signal. The audio alarm module applies voltage to the instrument cluster to illuminate the fasten safety belts indicator. The fasten safety belts indicator remains ON for approximately 70 seconds or until the driver seat belt is buckled.

If the driver seat belt is buckled before the ignition is turned ON, the fasten safety belts indicator will not illuminate.