Data Link References

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

This table identifies which serial data link that a particular module uses for in-vehicle data transmission and communication with the scan tool. Some modules may use more than one data link to communicate. Some modules may use different circuits for functional and diagnostic communication. Use the schematic reference link in the table for additional information. 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 Communications Description and Operation
Body Control Module (BCM)	Class 2 CAN	Scan Tool Does Not Communicate with Class 2 Device
Communication Interface Module (OnStar)	Class 2	Scan Tool Does Not Communicate with Class 2 Device
Digital Radio Receiver	Low Speed GMLAN	Scan Tool Does Not Communicate with Low Speed GMLAN Device
Electronic Brake Control Module (EBCM)	Keyword Data Line CAN	Scan Tool Does Not Communicate with Keyword Data Line
Engine Control Module (ECM), with L61	Keyword Data Line CAN	Scan Tool Does Not Communicate with Keyword Data Line
Inflatable Restraint Sensing and Diagnostic Module (SDM)	Class 2	Scan Tool Does Not Communicate with Class 2 Device
Instrument Panel Cluster (IPC)	Class 2	Scan Tool Does Not Communicate with Class 2 Device
Power Steering Control Module (PSCM)	Class 2	Scan Tool Does Not Communicate with Class 2 Device
Powertrain Control Module (PCM), with L66	Keyword Data Line CAN	Scan Tool Does Not Communicate with Keyword Data Line
Radio	Low Speed GMLAN	Scan Tool Does Not Communicate with Low Speed GMLAN Device
Transmission Control Module (TCM), with L61	Keyword Data Line CAN	Scan Tool Does Not Communicate with Keyword Data Line