Important: There are modules in this vehicle that communicate on a controller area network (CAN) serial data link. This CAN serial data link is not connected to the data link connector (DLC), and the scan tool cannot communicate on this link. Communication DTCs for this CAN Serial data link may be set by the module acting as an interface to the other serial data links. Refer to Data Link Connector Schematics for CAN serial data circuits. The following DTCs may be set when the interface module detects a loss of communication with a module on the CAN serial data link. Diagnose these DTCs as directed in the DTC Table:
• | DTC U0100, U0101, U0105 or U0106--Refer to DTC U0100-U0299 |
• | DTC U1800, U2105 or U2106--Refer to DTC U1800, U2105, U2106, or U2108 |
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. This table is used to assist in correcting a communication malfunction between the control module and the scan tool. 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 | ||||||
Audio Amplifier | Class 2 | |||||
Body Control Module (BCM) | Class 2 | |||||
CD Player (CDX) | Class 2 | |||||
Digital Radio Receiver (DRR) | Class 2 | |||||
Driver Door Module (DDM) | Class 2 | |||||
Driver Seat Module | Class 2 | |||||
Electronic Brake Control Module (EBCM) | Class 2 | |||||
Energy Storage Control Module (ESCM) | High Speed GMLAN | Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device | ||||
Front Passenger Door Module (PDM) | Class 2 | |||||
HVAC Control Module | Class 2 | |||||
Hybrid Control Module (HCM) |
| |||||
Inflatable Restraint Sensing and Diagnostic Module (SDM) | Class 2 | |||||
Instrument Panel Cluster (IPC) | Class 2 | |||||
Electro-Hydraulic Power Steering (EHPS) Module | High Speed GMLAN | Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device | ||||
Powertrain Control Module (PCM) |
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Radio | Class 2 | |||||
Rear Seat Audio (RSA) Controller | Class 2 | |||||
Rear Seat Entertainment (RSE) | Class 2 | |||||
Rear Wheel Steering Control Module (RWSCM) | Class 2 | |||||
Starter/Generator Control Module (SGCM) | High Speed GMLAN | Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device | ||||
Transfer Case Shift Control Module (TCSCM) | Class 2 | |||||
Transmission Control Module (TCM) | Class 2 | |||||
Vehicle Communication Interface Module (VCIM) | Class 2 |