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 Headlamp Levelling Control Module | High Speed GMLAN | |||||
Bluetooth Module | Non-GMLAN | -- | ||||
Body Control Module (BCM) |
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Electronic Brake Control Module (EBCM) | High Speed GMLAN | |||||
Electronic Suspension Control Module | High Speed GMLAN | |||||
Engine Control Module (ECM) | High Speed GMLAN | |||||
HVAC Control Module | Low Speed GMLAN | |||||
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | |||||
Instrument Panel Cluster (IPC) | Low Speed GMLAN | |||||
Memory Mirror Module | Non-GMLAN | -- | ||||
Memory Seat Module (MSM) | Non-GMLAN | -- | ||||
Navigation Unit | Non-GMLAN | -- | ||||
Navigation Interface Module | Low Speed GMLAN | |||||
Object Alarm Module | Low Speed GMLAN | |||||
Rear Seat Entertainment Interface Module | Low Speed GMLAN | |||||
Remote Function Actuator (RFA) | Low Speed GMLAN | |||||
Secondary Information Centre | Low Speed GMLAN | |||||
Seat Interface Module | Low Speed GMLAN | |||||
Steering Angle Sensor | High Speed GMLAN | |||||
Theft Deterrent Control Module | Low Speed GMLAN | |||||
Transmission Control Module (TCM) | High Speed GMLAN | |||||
Telematics Module | Low Speed GMLAN | |||||
