Seat Belt Indicator

The seat belt switch is a discrete input to the BCM which opens when you insert the seat belt into the buckle. The BCM commands the instrument cluster to illuminate the red seat belt indicator under either of the following conditions:
^ The seat belt switch is active when Ignition 1 changes from inactive to active
^ While Ignition 1 is active and the seat belt input changes from inactive to active.

Upon either transition, the seat belt indicator glows steady for 20 seconds and then flashes at 1 Hz for 55 seconds. The indicator turns off when any one of the following conditions becomes true:
^ At the end of the 75 seconds
^ If the seat belt input becomes inactive
^ If Ignition 1 becomes inactive

If a Class 2 data link fails, the seat belt indicator does not illuminate unless the indicator was illuminated prior to the Class 2 data link failure.