Body Control Modules: Description

The body control system consists of the following modules:

• Dash Integration Module (DIM).
• Instrument Panel Module (IPM).
• Rear Integration Module (RIM).

Each of these modules integrate a number of functional systems under the control of a single module. Modules are connected to the class 2 serial data circuit. Many control signals are implemented by class 2 messages. Class 2 serial data circuit is configured as a ring with discrete lines entering and leaving each module. This allows communication on the ring if one of the 2 discrete circuits is open.

The following modules communicate on the class 2 serial data circuit:

• DIM.
• Driver Door Module (DDM).
• Electronic Brake Control Module (EBCM).
• Head Up Display (HUD).
• HVAC Control Module.
• Sensing and Diagnostic Module (SDM).
• Instrument Panel Cluster (IPC).
• IPM.
• Memory Seat Module (MSM).
• Powertrain Control Module (PCM).
• Radio.
• RIM.
• Remote Control Door Lock Receiver (RCDLR).
• Remote Playback Device - CD Changer.
• Vehicle Theft Deterrent (VTD) Control Module.
• Vehicle Interface Unit (VIU).

The following modules have only one communication line connection to the class 2 data circuit:

• DDM.
• HUD.
• MSM.
• VIU.