Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2014EQUINOX LS, FWD, GAS/ETHANOLREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISDATA COMMUNICATION SYSTEM
2014 Chevrolet Equinox LS, FWD, Gas/Ethanol
Data Communication System
2014 Chevrolet Equinox LS, FWD, Gas/EthanolSECTION Data Communication System
- Schematic Wiring Diagrams
- Data Communication System Wiring Schematics
- Low Speed GMLAN (1 of 2) Wiring Schematics
- Low Speed GMLAN (2 of 2) Wiring Schematics
- High Speed GMLAN (1 of 2) Wiring Schematics
- High Speed GMLAN (2 of 2) Wiring Schematics
- Enable Serial Data Wiring Schematics
- BCM Linear Interconnect Network (LIN) Bus 1, 2, 3, 4, and Memory Seat LIN Bus Wiring Schematics
- Radio/HVAC Linear Interconnect Network (LIN) Bus and CAN Graphical Interface Wiring Schematics
- Chassis Expansion Bus Wiring Schematics
- Powertrain Expansion Bus Wiring Schematics
- Body Control System Wiring Schematics
- Data Communication System Wiring Schematics
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Control Module U Code List
- DTC B1000: Electronic Control Unit
- DTC B1001: Option Configuration
- DTC B101D: Option Configuration
- 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 Memory
- DTC U0001: High Speed CAN Communication Bus Malfunction
- DTC U0020: Low Speed CAN Bus
- DTC U0073 or U2100: Control Module Communication
- DTC U0074 (Chassis Expansion Bus): Control Module Communication Bus B 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 U0074 (Powertrain Expansion Bus): Control Module Communication Powertrain Expansion CAN Bus Off Malfunction
- DTC U0078: Control Module Communication Low Speed CAN Bus Off
- DTC U0100 - U02FF: 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 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 U1826 or U1827: Lost Communication with Sensor Module on Powertrain Expansion CAN Bus
- 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 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 U18B9-U18BF: High Speed CAN Bus Subnet Configuration List
- DTC U2099: High Speed Communication Enable Circuit
- 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
- DTC U2101: CAN Bus Maximum List of Control Modules
- DTC U2105-U2199: 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 U3000: CC 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
- 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
- Object High Speed GMLAN Circuit Description
- Media Oriented Systems Transport (MOST) Circuit Description
- CAN Graphical Interface (CGI) Circuit Description
- Mid Speed GMLAN Circuit Description
- Low Speed GMLAN Circuit Description
- Local Interconnect Network (LIN) Circuit Description
- Communication Enable Circuit Description
- Data Link Connector (DLC)
- Serial Data Reference
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.