WOMS
U code network Medium severity

U0499 Invalid Data Received From Telematic Control Module

The OBD2 code U0499 indicates that the vehicle's control module has received invalid or corrupted data from the Telematic Control Module, which may affect communication between modules

Definition

The OBD2 code U0499 indicates that the vehicle's control module has received invalid or corrupted data from the Telematic Control Module, which may affect communication between modules

Common causes

  • Faulty Telematic Control Module (TCM)
  • Communication issues between modules
  • Corrupted software or firmware in the TCM
  • Damaged wiring or connectors
  • Low battery voltage or power supply issues
  • Faulty sensors or inputs related to the TCM
  • Interference from aftermarket devices or modifications

Common misdiagnoses

  • Faulty Telematic Control Module (TCM)
  • Wiring issues or short circuits
  • Faulty Engine Control Module (ECM)
  • Communication issues with other control modules
  • Software glitches or outdated firmware
  • Sensor malfunctions
  • Battery or power supply problems
  • Incorrectly configured aftermarket devices or accessories

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 and help identify related issues

  2. 2. Inspect Wiring and Connectors

    Examine the wiring and connectors associated with the Telematic Control Module. Look for signs of damage, corrosion, loose connections, or frayed wires that could affect communication

  3. 3. Clear the Code

    Clear the U0499 code using an OBD-II scanner and see if it returns after a short drive. If the code reappears, it indicates a persistent issue

  4. 4. Check Power and Ground

    Ensure that the Telematic Control Module is receiving proper power and ground. Use a multimeter to check voltage and ground connections

  5. 5. Inspect the Telematic Control Module

    If the wiring and connections are intact, the Telematic Control Module itself may be faulty. Check for any visible damage or signs of failure

  6. 6. Update Software/Firmware

    Sometimes, the issue can be resolved by updating the software or firmware of the Telematic Control Module. Check with the manufacturer for any available updates

  7. 7. Perform a Network Test

    Use a scan tool to perform a network test to ensure that the communication between the Telematic Control Module and other modules is functioning correctly

  8. 8. Check for Interference

    If the vehicle has aftermarket devices installed (like GPS trackers, alarms, etc.), they may interfere with the Telematic Control Module's operation. Temporarily disconnect these devices to see if the issue resolves

  9. 9. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the U0499 code for your specific vehicle make and model. Manufacturers may have issued guidance on known issues and fixes

  10. 10. Professional Diagnosis

    If the problem persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership for a more in-depth diagnosis. They may have specialized tools and knowledge to address complex issues. By following these steps, you can systematically troubleshoot the U0499 code and identify the underlying cause of the problem