Body Control Module Diagnostic System Check: Description

The BCM controls different body systems by obtaining information from various sensors and switches, then uses this information to command the output to each body system over class 2 serial data circuit. Three different types of BCM are available: Type-2, Type-3 and Type-4. BCM Type-2 controls the following systems:

• Automatic power door lock and unlock.
• Chime/warning.
• Interior illumination control.
• Retained accessory power.
• Exterior illumination control.
• Automatic power door locks.

BCM Type-3 provides the same features as BCM Type-2, and includes functions that allow BCM to receive Remote Keyless Entry (RKE) system. BCM Type-4 provides the same features as BCM Type-2 and BCM Type-3, and includes Content Theft Deterrent (CTD) system functions.