WOMS
U code network Medium severity

U1713 U1713: Transmission Control Module Communication Error

The OBD2 code U1713 indicates a communication error between the Transmission Control Module (TCM) and other control modules in the vehicle, suggesting a possible issue with wiring, connectors, or the TCM itself

Definition

The OBD2 code U1713 indicates a communication error between the Transmission Control Module (TCM) and other control modules in the vehicle, suggesting a possible issue with wiring, connectors, or the TCM itself

Common causes

  • Faulty Transmission Control Module (TCM)
  • Damaged wiring or connectors
  • Poor electrical connections
  • Faulty Engine Control Module (ECM)
  • Software issues or bugs
  • Low transmission fluid levels
  • Corroded terminals
  • Malfunctioning sensors related to transmission
  • Issues with the vehicle's CAN bus system
  • Aftermarket modifications or installations affecting communication

Common misdiagnoses

  • Faulty Transmission Control Module (TCM)
  • Wiring issues or damaged connectors
  • Faulty Engine Control Module (ECM)
  • Low transmission fluid levels
  • Transmission solenoid issues
  • Faulty sensors (e.g., speed sensors)
  • Software or firmware issues in the TCM
  • Grounding problems
  • Battery or charging system issues
  • Corrupted data or communication errors in the CAN bus system

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues affecting the TCM

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors related to the TCM for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent or corroded

  4. 4. Check Power and Ground

    Verify that the TCM is receiving the correct voltage and ground. Use a multimeter to check the power supply and ground connections to the TCM

  5. 5. Inspect the TCM

    If the wiring and connections are intact, consider inspecting the TCM itself for any signs of damage or failure. This may involve removing the TCM and checking for physical damage

  6. 6. Check for Communication Issues

    Use a scan tool to monitor communication between the TCM and other modules. Ensure that the TCM is communicating properly with the Engine Control Module (ECM) and other relevant modules

  7. 7. Perform a Hard Reset

    Disconnect the vehicle's battery for a few minutes to reset the vehicle's computer systems. Reconnect the battery and see if the code reappears

  8. 8. Update Software/Firmware

    Check if there are any software updates available for the TCM or other related modules. Sometimes, communication issues can be resolved with a software update

  9. 9. Check for Environmental Factors

    Ensure that there are no environmental factors affecting the TCM, such as moisture or extreme temperatures

  10. 10. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the specific make and model of your vehicle. Manufacturers may have issued guidance on common issues related to the U1713 code

  11. 11. Replace the TCM (if necessary)

    If all other troubleshooting steps fail and the TCM is determined to be faulty, consider replacing it. Ensure that the replacement TCM is compatible with your vehicle.1

  12. 12. Professional Diagnosis

    If you are unable to resolve the issue, it may be best to consult a professional mechanic or technician who has experience with transmission control systems.Conclusion Always remember to take safety precautions when working on your vehicle, and if you're unsure about any step, it's best to seek professional assistance