WOMS
U code network Medium severity

U1370 Invalid Data Received from Vehicle Control Module

The OBD2 code U1370 indicates that the vehicle's control module has received invalid or corrupted data from another control module, suggesting a communication issue within the vehicle's network

Definition

The OBD2 code U1370 indicates that the vehicle's control module has received invalid or corrupted data from another control module, suggesting a communication issue within the vehicle's network

Common causes

  • Faulty Vehicle Control Module (VCM)
  • Poor or damaged wiring/connectors
  • Corrupted software or firmware in the VCM
  • Communication issues between modules
  • Grounding issues
  • Interference from aftermarket devices
  • Low battery voltage or power supply issues

Common misdiagnoses

  • Faulty Vehicle Control Module (VCM)
  • Wiring issues or short circuits
  • Faulty sensors (e.g., wheel speed sensors)
  • Communication issues between modules
  • Corrupted software or firmware in the VCM
  • Battery or power supply problems
  • Faulty diagnostic tools or incorrect code reading

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing related codes can help pinpoint the issue

  2. 2. Inspect Wiring and Connectors

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

  4. 4. Pay special attention to the wiring harnesses that connect the modules involved in the communication

  5. 5. Check for Ground Issues

    Ensure that all control modules have a good ground connection. Poor grounding can lead to communication errors

  6. 6. Inspect Control Modules

  7. 7. If possible, check the specific control module that is reporting the U1370 code. Look for any signs of physical damage or water intrusion

  8. 8. If you have access to a known good module, consider swapping it to see if the problem persists

  9. 9. Test Communication Lines

  10. 10. Use a multimeter or an oscilloscope to test the communication lines (CAN bus) between the control modules. Look for proper voltage levels and signal integrity

  11. 11. Check for short circuits or open circuits in the communication lines

  12. 12. Check for Software Updates

    Sometimes, control modules may require software updates to resolve communication issues. Check with the manufacturer for any available updates

  13. 13. Clear Codes and Test Drive

    After performing inspections and repairs, clear the trouble codes and take the vehicle for a test drive to see if the code reappears

  14. 14. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the U1370 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  15. 15. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized diagnostic tools and experience with your vehicle. By following these steps, you can systematically diagnose and potentially resolve the U1370 code