Class 2 Serial Data Line

Class 2 serial data line 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. Control modules on the class 2 serial data line can include the following:

• Climate Control Panel (CCP).
• Compact Disc Changer (CDX).
• Dash Integration Module (DIM).
• Driver's Door Module (DDM).
• Electronic Brake Control Module (EBCM).
• Heads Up Display (HUD) module.
• Inflatable Restraint Sensing and Diagnostic Module (SDM).
• Instrument Panel Cluster (IPC).
• Instrument Panel Module (IPM).
• Memory Seat Module (MSM).
• Pass-Key(R) III Vehicle Theft Deterrent (VTD) module.
• Powertrain Control Module (PCM).
• Radio.
• Rear Integration Module (RIM).
• Remote Function Actuator (RFA).

DDM, HUD module, MSM and the Data Link Connector (DLC) have only one communication line connection to the class 2 serial data line.