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U code network Medium severity

U0196 Lost Communication With Rear Seat Entertainment Control Module

The OBD2 code U0196 indicates a loss of communication with the rear seat entertainment control module, suggesting that the vehicle's diagnostic system is unable to communicate with this specific module

Definition

The OBD2 code U0196 indicates a loss of communication with the rear seat entertainment control module, suggesting that the vehicle's diagnostic system is unable to communicate with this specific module

Common causes

  • Faulty Rear Seat Entertainment Control Module
  • Damaged wiring or connectors
  • Poor ground connection
  • Blown fuse
  • Corroded terminals
  • Software issues or glitches
  • Faulty communication network (CAN bus)

Common misdiagnoses

  • Faulty rear seat entertainment control module
  • Wiring issues or damaged connectors
  • Faulty body control module (BCM)
  • Software glitches or updates needed
  • Issues with the main vehicle communication network (CAN bus)
  • Faulty power supply or ground connections
  • Problems with the front entertainment system or head unit

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 about the issue

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors leading to the Rear Seat Entertainment Control Module (RSECM) 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. Check Power and Ground

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

  5. 5. Ground Connection

    Ensure that the ground connection for the RSECM is secure and functioning properly

  6. 6. Inspect the Rear Seat Entertainment Control Module

    Module Condition: Check the RSECM for any physical damage or signs of failure

  7. 7. Re-seat the Module

    If applicable, disconnect and reconnect the module to ensure a good connection

  8. 8. Check for Communication Issues

    CAN Bus Communication: The RSECM communicates over the CAN bus. Use a scan tool to check if other modules on the bus are functioning correctly

  9. 9. Bus Integrity

    Inspect the CAN bus wiring for shorts, opens, or other issues that could disrupt communication

  10. 10. Perform a Hard Reset

    Disconnect the vehicle's battery for a few minutes to reset the modules. Reconnect and see if the code reappears

  11. 11. Update Software/Firmware

    Check if there are any software updates available for the vehicle’s modules. Sometimes, communication issues can be resolved with a software update

  12. 12. Test the Module

    If you have access to a known good RSECM, consider swapping it out to see if the issue persists. This can help determine if the module itself is faulty

  13. 13. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the RSECM or communication issues for your specific vehicle make and model. Manufacturers may have specific fixes or recommendations

  14. 14. Seek Professional Help

    If the issue persists after performing these steps, it may be best to consult a professional mechanic or dealership for further diagnosis. They may have specialized tools and knowledge to address complex communication issues. By following these steps, you should be able to identify the cause of the U0196 code and take appropriate action to resolve it