Important:
• For DTC U1500, refer to
DTC U1500
in
Cellular Communication. • For DTC U0107, refer to
DTC U0107
in
Engine Controls - 3.4L
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 Link Connector Schematics | ||||||
Body Control Module (BCM) |
| |||||
Digital Radio Receiver (DRR), w/U2K | Class 2 | |||||
Electronic Brake Control Module (EBCM), w/JM4 | High Speed GMLAN | |||||
Instrument Panel Cluster (IPC) | Class 2 | |||||
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Class 2 | |||||
Powertrain Control Module (PCM) | High Speed GMLAN | |||||
Power Steering Control Module (PSCM) | Class 2 | |||||
Radio | Class 2 | |||||
Transmission Control Module (TCM) | High Speed GMLAN | |||||
Vehicle Communication Interface Module (VCIM), w/UE1 |
| |||||
