Data Communication System
- Specifications
- Schematic Wiring Diagrams
- Data Communication Wiring Schematics
- Low Speed GMLAN
- High Speed GMLAN (1 of 2) (except CZ2)
- High Speed GMLAN (2 of 2) (except CZ2)
- High Speed GMLAN (CZ2)
- Powertrain High Speed GMLAN (LEA/LTG/LAF/LDK)
- Chassis Expansion Bus (except CZ2)
- Chassis Expansion Bus (CZ2)
- GMLAN Communications Enable (except CZ2)
- GMLAN Communications Enable (CZ2)
- Linear Interconnect Network (except CZ2)
- Local Interconnect Network (LIN) Bus (1 of 2) (CZ2)
- Local Interconnect Network (LIN) Bus (2 of 2) (CZ2)
- Most 50 Bus (except CZ2)
- Most 50 Bus (CZ2 with UDD)
- Most 50 Bus (CZ2 with UHS/UQS)
- Body Control System Wiring Schematics
- Data Communication Wiring Schematics
- 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-P0607, P060A-P060C, P0610, P062F, P16E9-P16F0, or P262B: Control Module
- DTC U0001: High Speed CAN Communication Bus Malfunction
- DTC U0020: Low Speed CAN Bus
- DTC U0028: MOST 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
- Repair Verification
- DTC U0029: MOST Bus Performance
- DTC U0073 or U2100: Control Module Communication Bus A Off/CAN Bus Communication
- DTC U0074: Control Module Communication Bus B Off (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 CAN Bus Off Malfunction (Powertrain Expansion Bus)
- DTC U0077: Control Module Communication Chassis Expansion CAN Bus Off
- 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 U0078: Control Module Communication Low Speed CAN Bus Off
- DTC U0100 - U02FF: Control Module U Code List
- 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 U0300 - U0336: Control Module U Code List
- DTC U0400 - U05FF: Control Module U Code List
- DTC U1500-U15FF: Control Module U Code List
- 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 U1833: Lost Communication with Electronic Brake Control Module on Chassis Expansion CAN 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 U18A2: Lost Communication with Fuel Pump Driver Control Module
- Diagnostic Instructions
- DTC Descriptors
- 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 U18A6: Lost Communication with Right Object Detection Control Module on Dedicated Bus 1
- 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
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC U18B9-U18BF: Primary/Secondary High Speed CAN Bus Subnet Configuration List
- DTC U2098: MOST Communication Enable
- DTC U2099: High Speed Communication Enable Circuit
- DTC U2101: CAN Bus Maximum List of Control Modules
- DTC U2160-U2231: Control Module U Code List
- 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 U2616: Fuel Pump Driver Control Module Lost Communication with ECM
- Diagnostic Instructions
- DTC Descriptors
- 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
- Symptoms - Data Communications
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device
- Scan Tool Does Not Communicate with High Speed GMLAN Device
- Scan Tool Does Not Communicate with Low Speed GMLAN Device
- Data Link References
- Repair Instructions
- Description and Operation
- Body Control System Description and Operation
- Data Link Communications Description and Operation
- Notes
- Circuit Description
- High Speed GMLAN Circuit Description
- Chassis High Speed GMLAN Circuit Description
- Powertrain High Speed GMLAN Circuit Description
- Media Oriented Systems Transport (MOST) Circuit Description
- Low Speed GMLAN Circuit Description
- Local Interconnect Network (LIN) Circuit Description
- Communication Enable Circuit Description
- Data Link Connector (DLC)
- Serial Data Reference
- Special Tools and Equipment