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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 | ||||
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Schematic Reference: Data Communication Schematics | ||||||
Body Control Module - Auxiliary | Low Speed GMLAN | |||||
Body Control Module |
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Electronic Brake Control Module |
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Engine Control Module | High Speed GMLAN | |||||
Front and Rear Parking Assist Control Module | Low Speed GMLAN | |||||
Fuel Pump Control Module | High Speed GMLAN | |||||
Headlamp Levelling Control Module | Keyword Data Line | |||||
HVAC Control Module | Low Speed GMLAN | |||||
Immobiliser Control Module | Low Speed GMLAN | |||||
Inflatable Restraint Sensing and Diagnostic Module | Low Speed GMLAN | |||||
Info Display Module |
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Instrument Panel Cluster | Low Speed GMLAN | |||||
Mobile Telephone Control Module | Mid Speed GMLAN | |||||
Navigation Control Module | Low Speed GMLAN | |||||
Handbrake Control Module | High Speed GMLAN | |||||
Power Steering Control Module | Keyword Data Line | |||||
Radio | Mid Speed GMLAN | |||||
Rear Differential Clutch Control Module | High Speed GMLAN | |||||
Remote Control Door Lock Receiver | Low Speed GMLAN | |||||
Steering Angle Sensor | Chassis High Speed GMLAN | |||||
Transmission Control Module | High Speed GMLAN | |||||
Yaw and Lateral Accelerometer Sensor | Chassis High Speed GMLAN | |||||
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