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. 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 .
Data Link References
| Control Module | Data Link Type | Diagnostic Procedure |
|---|---|---|
| Schematic Reference: Data Communication Schematics | ||
| Audible Alert Control Module (CHIME) (w/UL5) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Auxiliary Heater Control Module (FOH) (w/K08, Coolant Heater) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Body Control Module (BCM) |
|
|
| Digital Radio Receiver | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Electronic Brake Control Module (EBCM) (W/JL4, JL9, LU3) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Engine Control Module (ECM) |
|
|
| Fuel System Control Module (FSCM) (W/LMF) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Glow Plug Control Module (GPCM) (W/LMM) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Instrument Panel Cluster (IPC) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Nitrogen Oxides Sensor 1 (w/LML/LGH) | Powertrain High Speed GMLAN | DTC U0074 |
| Nitrogen Oxides Sensor 2 (w/LML/LGH) | Powertrain High Speed GMLAN | DTC U0074 |
| Passenger Presence System (PPS) (w/o YF7) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Radio w/o UL5 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Reductant Sensor Module (w/LML/LGH) | Powertrain High Speed GMLAN | DTC U0074 |
| Remote Compass Module (RCM) | Local Interconnect Network (LIN) | DTC U1500, U1511, U1512 or U1513 |
| Remote Control Door Lock Receiver (RCDLR) W/AUO | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Roll Over Sensor (ROS) (w/o YF7) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Transmission Control Module (TCM) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Vehicle Communication Interface Module (VCIM) |
|
|
| Vehicle Theft Deterrent (VTD) Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |