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 Data Link Communications Description and Operation .
Control Module | Data Link Type | Diagnostic Procedure | ||||
|---|---|---|---|---|---|---|
Schematic Reference: Data Link Connector Schematics | ||||||
Amplifier | Low Speed GMLAN | |||||
Body Control Module (BCM) |
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Communication Interface Module (OnStar), w/UE1 |
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Digital Radio Receiver (DRR), w/U2K | Low Speed GMLAN | |||||
Driver Door Module (DDM)/Driver Door Switch Assembly (DDSA) | Low Speed GMLAN | |||||
Electronic Brake Control Module (EBCM) | High Speed GMLAN | |||||
Electronic Suspension Control (ESC) Module w/FE1, F55 | High Speed GMLAN | |||||
Engine/Powertrain Control Module (ECM/PCM) | High Speed GMLAN | |||||
Front and Rear Object Alarm Module w/UD7 | Low Speed GMLAN | |||||
Front Passenger Door Module (FPDM) | Low Speed GMLAN | |||||
HVAC Control Module | Low Speed GMLAN | |||||
Inside Rearview Mirror | Low Speed GMLAN | |||||
Instrument Panel Cluster (IPC) | Low Speed GMLAN | |||||
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | |||||
Memory Seat Module (MSM)/Driver Position Module (DPM) | Low Speed GMLAN | |||||
Passenger Presence System (PPS) | Low Speed GMLAN | |||||
Radio | Low Speed GMLAN | |||||
Remote Function Actuator (RFA) | Low Speed GMLAN | |||||
Transmission Control Module (TCM) | High Speed GMLAN | |||||
Vehicle Theft Deterrent (VTD) Control Module | Low Speed GMLAN | |||||
