Body Control Module Functions

The Body Control Module (BCM) performs multiple body control functions. BCM can control devices directly connected to its outputs based on input information. BCM evaluates this information and controls certain body control systems by commanding outputs on or off. BCM control inputs can be:

• Class 2 serial data received from other vehicle systems connected to class 2 serial data link.
• Sensors and switches that are directly connected to BCM.

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

BCM controls following functions.

• Audible Warnings
• Automatic Headlight Control
• Interior Lighting
• Power Door Locks
• Remote Keyless Entry
• Retained Accessory Power
• Vehicle Theft Deterrent (PASS-Key(R) II)

Components on the class 2 serial data link are.

• Body Control Module
• Electronic Brake Control Module/Electronic Brake Traction Control Module
• Heater-A/C Control Module
• Instrument Panel Cluster
• Powertrain Control Module
• Supplemental Inflatable Restraint System Sensing & Diagnostic Module
• Vehicle Interface Unit