WOMS
U code network High severity

U2713 refers to a communication issue related to the transmission control module (TCM) in a vehicle

The OBD2 code U2713 indicates a communication issue between the transmission control module (TCM) and other control modules in the vehicle, suggesting a potential fault in the data transmission or connection

Definition

The OBD2 code U2713 indicates a communication issue between the transmission control module (TCM) and other control modules in the vehicle, suggesting a potential fault in the data transmission or connection

Common causes

  • Faulty Transmission Control Module (TCM)
  • Damaged or corroded wiring/connectors
  • Poor ground connection
  • Failed or malfunctioning sensors (e.g., speed sensors)
  • Software issues or outdated firmware
  • Issues with the vehicle's power supply
  • Faulty transmission components
  • Intermittent electrical connections

Common misdiagnoses

  • Faulty Transmission Control Module (TCM)
  • Wiring issues or damaged connectors
  • Faulty Transmission Range Sensor
  • Low transmission fluid levels
  • Faulty Engine Control Module (ECM)
  • Incorrectly calibrated or programmed TCM
  • Faulty vehicle speed sensor
  • Issues with the CAN bus system
  • Faulty or corroded ground connections
  • Malfunctioning transmission solenoids

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, corroded, or damaged

  4. 4. Check Power and Ground

    Power Supply: Verify that the TCM is receiving the correct voltage. Use a multimeter to check the power supply to the TCM

  5. 5. Ground Connections

    Ensure that the ground connections for the TCM are secure and free of corrosion

  6. 6. Inspect the TCM

    Physical Condition: Check the TCM for any signs of physical damage or water intrusion

  7. 7. Reprogramming

    If applicable, consider reprogramming or updating the TCM software, as a software glitch can sometimes cause communication issues

  8. 8. Scan for Communication Issues

    CAN Bus Communication: Use a scan tool to check the communication on the CAN bus. Ensure that the TCM is communicating with other modules (like the Engine Control Module)

  9. 9. Bus Voltage

    Measure the voltage on the CAN bus to ensure it is within the expected range

  10. 10. Check for Intermittent Issues

    Wiggle Test: While monitoring the TCM communication, perform a wiggle test on the wiring harness to see if the communication drops out, indicating a possible intermittent connection issue

  11. 11. Test the TCM

    If all other checks are satisfactory, consider testing the TCM itself. This may involve swapping it with a known good unit if available

  12. 12. Consult Technical Service Bulletins (TSBs)

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

  13. 13. Professional Diagnosis

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis. They may have specialized tools and knowledge to address complex issues

  14. 14. Clear Codes and Test Drive

    After performing repairs or adjustments, clear the codes and take the vehicle for a test drive to see if the code returns. By following these steps, you can systematically diagnose and address the communication issue related to the TCM indicated by the U2713 code