WOMS
U code network Medium severity

U0184 Lost Communication With Radio

The OBD2 code U0184 indicates a loss of communication between the vehicle's control module and the radio system, suggesting a potential issue with the wiring, connectors, or the radio unit itself

Definition

The OBD2 code U0184 indicates a loss of communication between the vehicle's control module and the radio system, suggesting a potential issue with the wiring, connectors, or the radio unit itself

Common causes

  • Faulty radio unit
  • Damaged wiring or connectors
  • Poor ground connection
  • Malfunctioning CAN bus
  • Software issues or glitches
  • Battery voltage issues
  • Corroded terminals or connectors

Common misdiagnoses

  • Faulty radio unit
  • Wiring issues
  • Faulty CAN bus
  • Defective control module
  • Software glitches
  • Poor ground connections
  • Battery or power supply issues

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any additional 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 radio and the vehicle's communication network. Look for 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 the Radio Unit

    Power Supply: Verify that the radio is receiving power. Check the fuses related to the radio and replace any that are blown

  5. 5. Ground Connection

    Ensure that the radio has a good ground connection

  6. 6. Functionality

    If possible, test the radio unit in another vehicle or replace it temporarily to see if the issue persists

  7. 7. Inspect the CAN Bus

    The radio communicates over the Controller Area Network (CAN) bus. Check for any issues with the CAN bus wiring or other modules that may be affecting communication

  8. 8. Look for any signs of short circuits or open circuits in the CAN bus wiring

  9. 9. Check for Software Issues

    Updates: Ensure that the vehicle's software and the radio firmware are up to date. Sometimes, software glitches can cause communication issues

  10. 10. Reset

    Try resetting the radio or the vehicle’s computer system (ECU) to see if that resolves the communication issue

  11. 11. Inspect Other Modules

    Other modules in the vehicle may also affect communication with the radio. Check for any issues with related modules, such as the infotainment system, body control module, or any other modules that communicate with the radio

  12. 12. Perform a Network Test

    If you have access to advanced diagnostic tools, perform a network test to check the communication between modules. This can help identify if the issue is isolated to the radio or if it’s part of a larger communication problem

  13. 13. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to your vehicle make and model that might address known issues with the radio or communication errors

  14. 14. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized tools and knowledge to diagnose and repair the issue effectively.Conclusion By following these troubleshooting steps, you can systematically identify and address the cause of the U0184 code. Always ensure safety precautions are taken when working with vehicle electronics