WOMS
U code network Medium severity

U0514 Invalid Data Received From Mirror Control Module

The OBD2 code U0514 indicates that the vehicle's control module has received invalid or corrupted data from the mirror control module, which may affect the functionality of the mirrors

Definition

The OBD2 code U0514 indicates that the vehicle's control module has received invalid or corrupted data from the mirror control module, which may affect the functionality of the mirrors

Common causes

  • Faulty mirror control module
  • Wiring issues or damaged connectors
  • Communication network problems (CAN bus issues)
  • Software glitches or outdated firmware
  • Corroded terminals or poor ground connections
  • Malfunctioning body control module (BCM)
  • Interference from aftermarket accessories or modifications

Common misdiagnoses

  • Faulty mirror control module
  • Wiring issues or short circuits
  • Faulty body control module (BCM)
  • Software glitches or updates needed
  • Faulty power supply or ground connections
  • Incorrectly configured or incompatible aftermarket mirrors
  • Issues with the vehicle's communication network (CAN bus)

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. Sometimes, multiple codes can provide more context for the issue

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring and connectors related to the mirror control module 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. Test the Mirror Control Module

    Functionality Test: If possible, test the mirror control module to ensure it is functioning correctly. This may involve using a multimeter to check for proper voltage and ground

  5. 5. Replacement

    If the module is suspected to be faulty, consider replacing it with a known good unit

  6. 6. Check for Short Circuits or Open Circuits

    Use a multimeter to check for continuity in the wiring harness. Look for any shorts to ground or open circuits that could be causing communication issues

  7. 7. Inspect the CAN Bus

    Since the mirror control module communicates over the CAN bus, check for any issues with the bus itself. Look for

  8. 8. Faulty modules on the bus

  9. 9. Termination resistors that may be damaged or missing

  10. 10. Intermittent connections

  11. 11. Update or Reprogram the Module

    If the vehicle has had recent software updates or changes, ensure that the mirror control module is updated or reprogrammed as necessary

  12. 12. Check for Environmental Factors

    Sometimes, environmental factors such as moisture or extreme temperatures can affect module performance. Inspect for any signs of water intrusion or damage

  13. 13. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  14. 14. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the mirror control module for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  15. 15. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis. By following these steps, you should be able to identify the root cause of the U0514 code and take appropriate action to resolve the issue