Data Communication System
- Specifications
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- Control Module U Code List
- DTC B1000: Electronic Control Unit
- DTC B1001: Option Configuration
- DTC B101D: Electronic Control Unit Hardware
- DTC B101E: Electronic Control Unit Software
- DTC C056D: Electronic Control Unit Hardware
- DTC C056E: Electronic Control Unit Software
- DTC P0601-P0606, P060A, P062F or P262B: Control Module
- DTC U0001: High Speed CAN Communication Bus
- DTC U0020: Low Speed CAN Bus
- DTC U0073 or U2100: Control Module Bus Communication
- DTC U0074: Control Module Communication Bus B (Chassis Expansion Bus)
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC U0074: Control Module Communication (Powertrain Expansion Bus)
- DTC U0077: Control Module Communication Chassis Expansion CAN Bus
- DTC U0078: Control Module Communication Low Speed CAN Bus
- DTC U0100 - U02FF: Control Module (except U010E, U029D, U029E or U02A3)
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC U0100 - U02FF: Control Module (U010E, U029D, U029E or U02A3 only)
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- Repair Verification
- DTC U0300 - U0336: Control Module
- DTC U0400 - U05FF: Control Module
- DTC U1500-U15FF: Control Module
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC U1814: Powertrain Wake-Up Communication Circuit
- DTC U18B9-U18BF: Primary/Secondary High Speed CAN Bus Subnet
- DTC U2099: High Speed Communication Enable Circuit
- DTC U2101: CAN Bus Maximum List of Control Modules
- Symptoms - Data Communications
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device
- Diagnostic Instructions
- Diagnostic Fault Information
- Circuit/System Description
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Notes
- Testing the Serial Data Circuits for a Short to Voltage
- Testing the Serial Data Circuits for a Short to Ground
- Testing the Serial Data Circuits for a Short between the Circuits
- Testing the Serial Data Circuits for an Open/High Resistance (Data Bus Diagnostic Tool)
- Testing the Serial Data Circuits for an Open/High Resistance (Digital Multimeter)
- Testing the Device Circuits
- Repair Instructions
- Scan Tool Does Not Communicate with High Speed GMLAN Device
- Diagnostic Instructions
- Diagnostic Fault Information
- Circuit/System Description
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Notes
- Testing the Serial Data Circuits for a Short to Voltage
- Testing the Serial Data Circuits for a Short to Ground
- Testing the Serial Data Circuits for a Short between the Circuits
- Testing the Serial Data Circuits for an Open/High Resistance (Data Bus Diagnostic Tool)
- Testing the Serial Data Circuits for an Open/High Resistance (Digital Multimeter)
- Testing the Device Circuits
- Repair Instructions
- Scan Tool Does Not Communicate with Low Speed GMLAN Device
- Data Link References
- Repair Instructions
- Description and Operation