Data Link References
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. Additionally, these modules may utilize communication circuits not accessible from the data link connector (DLC), 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 Connector Schematics | ||
Body Control Module (BCM) | Class 2 | |
Digital Radio Receiver | Low Speed GMLAN | Refer to Scan Tool Does Not Communicate with Low Speed GMLAN Device |
Electronic Brake Control Module (EBCM) | Keyword Data Line | Refer to Scan Tool Does Not Communicate with Keyword Data Line |
Engine Control Module (ECM) (L61) | Keyword Data Line | Refer to Scan Tool Does Not Communicate with Keyword Data Line |
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Class 2 | |
Instrument Panel Cluster (IPC) | Class 2 | |
Power Steering Control Module (PSCM) | Class 2 | |
Powertrain Control Module (PCM) (L66) | Keyword Data Line | Refer to Scan Tool Does Not Communicate with Keyword Data Line |
Radio | Low Speed GMLAN | Refer to Scan Tool Does Not Communicate with Low Speed GMLAN Device |
Transmission Control Module (TCM) (L61) | Keyword Data Line | Refer to Scan Tool Does Not Communicate with Keyword Data Line |
Vehicle Communication Interface Module (VCIM) | Class 2 | |
