This table identifies which serial data link that a particular module uses for in-vehicle data transmission. Some modules may use more than one data link to communicate. Some modules may have multiple communication circuits passing through them without actively communicating on that data link. This table is used to assist in correcting a communication malfunction. For the description and operation of these serial data communication circuits refer to Body Control System Description and Operation.
Control Module | Data Link Type | Diagnostic Procedure | ||||
|---|---|---|---|---|---|---|
Schematic Reference: Body Control System Description and Operation | ||||||
Active Front Steering (AFS) Module w/ JL7 | High Speed GMLAN | |||||
Audio Amplifier | Low Speed GMLAN | |||||
Vehicle Communication Interface Module (OnStar) |
| Scan Tool Does Not Communicate with High Speed GMLAN Device Scan Tool Does Not Communicate with Low Speed GMLAN Device | ||||
Digital Radio Receiver (DRR) Module | Low Speed GMLAN | |||||
Distance Sensing Cruise Control (DSCC) Module | High Speed GMLAN | |||||
Driver Door Module (DDM) | Low Speed GMLAN | |||||
Driver Door Switch (DDS) | Low Speed GMLAN | |||||
Dynamic Headlamp Leveling (DHL) Module, w/ TR7 | High Speed GMLAN | |||||
Driver Position (Memory Seat) Module | Low Speed GMLAN | |||||
Electronic Brake Control Module (EBCM) | High Speed GMLAN | |||||
Electronic Suspension Control (ESC or MRRTD) Module | High Speed GMLAN | |||||
Engine Control Module (ECM) | High Speed GMLAN | |||||
Head Up Display (HUD) | Low Speed GMLAN | |||||
Climate Control Panel (CCP) Module | Low Speed GMLAN | |||||
Instrument Panel Cluster (IPC) | Low Speed GMLAN | |||||
Instrument Panel Module (IPM) |
| Scan Tool Does Not Communicate with High Speed GMLAN Device Scan Tool Does Not Communicate with Low Speed GMLAN Device | ||||
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | |||||
Left Rear Door Module (LRDM) | Low Speed GMLAN | |||||
Passenger Door Module (PDM) | Low Speed GMLAN | |||||
Radio | Low Speed GMLAN | |||||
Rear Integration Module (RIM) | Low Speed GMLAN | |||||
Remote Control Door Lock Receiver (RCDLR) | Low Speed GMLAN | |||||
Right Rear Door Module (RRDM) | Low Speed GMLAN | |||||
Side Blind Zone Alert (SBZA) Module, left | Low Speed GMLAN | |||||
Side Blind Zone Alert (SBZA) Module, right | Low Speed GMLAN | |||||
Steering Column Lock Control Module (SCLM), w/ UA2 | Low Speed GMLAN | |||||
Supervisory Control Module (SCM) w/ JL7 | High Speed GMLAN | |||||
Television Tuner Module, w/ YQ6 or YQ7 | Low Speed GMLAN | |||||
Transmission Control Module (TCM) | High Speed GMLAN | |||||
Vehicle Direction Alert Alarm (Lane Departure) Warning Module | Low Speed GMLAN | |||||
