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 Communication Schematics | ||||||
Automatic Level Control (ALCM) Module | High Speed GMLAN | |||||
Audio Amplifier | Low Speed GMLAN | |||||
Body Control Module (BCM) |
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Climate Control Seat Module (CCSM) w/KB6 | Keyword 2000 | |||||
Digital Radio Receiver (DRR) Module | Low Speed GMLAN | |||||
Driver Door Module (DDM) | Low Speed GMLAN | |||||
Driver Position (Memory Seat) Module | Low Speed GMLAN | |||||
Electronic Brake Control Module (EBCM) | High Speed GMLAN | |||||
Electronic Suspension Control (ESC) Module | High Speed GMLAN | |||||
Engine/Powertrain Control Module (ECM/PCM) | High Speed GMLAN | |||||
Front Passenger Door Module (FPDM) | Low Speed GMLAN | |||||
HVAC Control Module | Low Speed GMLAN | |||||
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | |||||
Inside Rearview Mirror | Low Speed GMLAN | |||||
Instrument Panel Cluster (IPC) | Low Speed GMLAN | |||||
Passenger Presence System (PPS) Module | Low Speed GMLAN | |||||
Radio (IRC) | Low Speed GMLAN | |||||
Remote Control Door Lock Receiver (RCDLR) | Low Speed GMLAN | |||||
Side Blind Zone Alert (SBZA) Module, left | Low Speed GMLAN | |||||
Side Blind Zone Alert (SBZA) Module, right | Low Speed GMLAN | |||||
Theft Deterrent Module (TDM) | Low Speed GMLAN | |||||
Transmission Control Module (TCM) | High Speed GMLAN | |||||
Universal Park Assist (UPA) Module | Low Speed GMLAN | |||||
Vehicle Communication Interface Module (OnStar) |
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Vehicle Direction Alert Alarm (Lane Departure) Warning Module | Low Speed GMLAN | |||||
