BCM Functions

The Body Control Module (BCM) performs multiple body control functions. The BCM can control devices directly connected to its outputs based on input information obtained from two sources:
^ Sensors and switches that are directly connected to the BCM
^ By receiving information from other vehicle systems connected to the class 2 serial data link.

The BCM evaluates this information and controls certain body control systems by commanding outputs on or off

The BCM is also capable of controlling other vehicle systems that are not directly wired to the BCM. The BCM does this by sending specific messages on the class 2 serial data link. The vehicle system capable of performing a required function will respond to the BCM message.

The BCM controls these functions:
^ Audible warnings, refer to Audible Warnings Description and Operation in Instrument Panel, Gauges and Warning Indicators.
^ Interior lighting, refer to Interior Lighting and Horns Description and Operation in Lighting and Horns.
^ Automatic door locks, refer to Power Door Locks Description and Operation in Doors.
^ Automatic headlamp control, refer to Exterior Lighting and Horns Description and Operation in Lighting and Horns.
^ keyless entry (AUO option), refer to Keyless Entry System Description and Operation in keyless Entry.
^ Passlock Sensor theft deterrent, refer to Vehicle Theft Deterrent (VTD) Description and Operation in Antitheft and Alarm Systems
^ Retained Accessory Power (RAP), refer to Retained Accessory Power (RAP) Description and Operation in Accessory Delay Module.


"For a description of the RPO Code(s) shown in this article or any of the images therein, refer to the RPO Code List found at Vehicle/Application ID". RPO Codes