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U0060 Vehicle Communication Bus D (-) Open

The OBD2 code U0060 indicates a communication issue where the Vehicle Communication Bus D (-) is open, meaning there is a disruption in the data transmission on that specific communication line

Definition

The OBD2 code U0060 indicates a communication issue where the Vehicle Communication Bus D (-) is open, meaning there is a disruption in the data transmission on that specific communication line

Common causes

  • Faulty wiring or connectors in the communication bus
  • Open circuit in the CAN bus wiring
  • Faulty or damaged control modules
  • Poor ground connections
  • Short circuits in the wiring
  • Corroded connectors
  • Interference from aftermarket devices
  • Software issues in control modules

Common misdiagnoses

  • Faulty ECM (Engine Control Module)
  • Faulty TCM (Transmission Control Module)
  • Bad wiring or connectors
  • Faulty CAN bus
  • Faulty sensors
  • Battery issues
  • Grounding problems
  • Faulty diagnostic tool or scanner

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context about the issue

  2. 2. Inspect Wiring and Connectors

  3. 3. Visually inspect the wiring and connectors associated with the communication bus. Look for any signs of damage, corrosion, or loose connections

  4. 4. Pay special attention to the D- line and ensure it is not broken or shorted to ground

  5. 5. Test the Communication Bus

  6. 6. Use a multimeter to check the resistance and continuity of the D- line. It should have a specific resistance value (usually close to 0 ohms) when the circuit is intact

  7. 7. If you have access to an oscilloscope, you can check the signal on the communication bus to see if it is transmitting data correctly

  8. 8. Check Ground Connections

    Ensure that all ground connections related to the communication bus are secure and free of corrosion. A poor ground can cause communication issues

  9. 9. Inspect Modules

  10. 10. Check the modules connected to the communication bus for any signs of failure. This includes the Engine Control Module (ECM), Transmission Control Module (TCM), and any other modules that may be on the bus

  11. 11. If possible, try disconnecting and reconnecting the modules to reset them

  12. 12. Look for Interference

    Sometimes, aftermarket accessories or modifications can interfere with the communication bus. If any recent changes have been made to the vehicle, consider reverting them to see if the issue resolves

  13. 13. Check for Short Circuits

    Use a multimeter to check for any short circuits between the D- line and ground or other wires. This can help identify if there is a short causing the open circuit

  14. 14. Scan Tool Communication

    Ensure that your OBD-II scanner is functioning properly and can communicate with the vehicle. Sometimes, the issue may be with the scanner itself

  15. 15. Replace Faulty Components

    If you identify any damaged wiring, connectors, or modules, replace them as necessary

  16. 16. Clear Codes and Test Drive

    After performing repairs, clear the trouble codes and take the vehicle for a test drive to see if the code returns. If the issue persists after following these steps, it may be necessary to consult a professional mechanic or technician who has experience with vehicle communication systems. They may have specialized tools and knowledge to diagnose more complex issues