Operation

OPERATION

The seat belt switch is designed to provide a status signal to the seat belt switch sense input of the Body Control Module (BCM) indicating whether the driver side front seat belt is fastened. The BCM uses the seat belt switch input to determine the status of the driver side front seat belt. The BCM then sends electronic messages to the Instrument Cluster to control the seat belt indicator based upon the status of the seat belt switch input.

The BCM does not set DTC for a faulty switch - they are normally open and are therefore undiagnoseable. Use the scan tool to read switch state. For proper diagnosis of the seat belt switch, a scan tool and the appropriate diagnostic information is required.