Data Link References
WARNING: This page is about a different car, the 2008 Cadillac DTS. 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. 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 Communication Schematics | ||
| Air Suspension Control Module (ASCM) w/F38 | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Amplifier w/UQA | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Auxiliary HVAC Control Module w/CJ4 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Body Control Module (BCM) |
|
Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Climate Control Seat Module (CCSM) w/KB6 | Keyword 2000 | Scan Tool Does Not Communicate with Keyword Data Line |
| Communication Interface Module (OnStar), w/UE1 |
|
Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Digital Radio Receiver (DRR), w/U2K | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Distance Sensing Cruise Control (DSCC) Module w/K59 | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Driver Door Module (DDM)/Driver Door Switch Assembly (DDSA) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Local Interconnect Network (LIN) | DTC U1500, U1511, U1512, or U1513 | |
| Electronic Brake Control Module (EBCM) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Electronic Suspension Control (ESC) Module w/FE1, F55 | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Engine/Powertrain Control Module (ECM/PCM) | High Speed GMLAN | Scan Tool Does Not Communicate with High Speed GMLAN Device |
| Front and Rear Object Alarm Module w/UFR | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Front Passenger Door Module (FPDM) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Local Interconnect Network (LIN) | DTC U1500, U1511, U1512, or U1513 | |
| HVAC Control Module CJ4/CJ2/C67 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Inside Rearview Mirror | 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 |
| Inflatable Restraint Sensing and Diagnostic Module (SDM) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Memory Seat Module (MSM)/Driver Position Module (DPM) w/A45 or w/AM3 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Passenger Presence System (PPS) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Radio | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Heated Seat Control Module - Rear w/KA6 | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Remote Function Actuator (RFA) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Side Object Detection Module - Left (SOD - L) | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Side Object Detection Module - Right (SOD - R) | 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 Theft Deterrent (VTD) Control Module | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Video Display w/U3Q | Low Speed GMLAN | Scan Tool Does Not Communicate with Low Speed GMLAN Device |
| Window Motors (all) | Local Interconnect Network (LIN) | DTC U1500, U1511, U1512, or U1513 |