FixItFor.Us
U code network Medium severity

U1165 SCP (J1850) Invalid or Missing Data for Tuner / Receiver

The OBD2 code U1165 SCP (J1850) indicates that there is invalid or missing data being received from the tuner or receiver module in the vehicle's communication network

Definition

The OBD2 code U1165 SCP (J1850) indicates that there is invalid or missing data being received from the tuner or receiver module in the vehicle's communication network

Common causes

  • Faulty tuner/receiver module
  • Poor or damaged wiring/connectors
  • Corrupted software or firmware in the tuner/receiver
  • Communication issues between the tuner/receiver and the vehicle's network
  • Low battery voltage or power supply issues
  • Interference from aftermarket audio equipment
  • Faulty or missing ground connections

Common misdiagnoses

  • Faulty tuner/receiver
  • Wiring issues or damaged connectors
  • Faulty or corroded ground connections
  • Software or firmware issues in the audio system
  • Incorrectly configured audio settings
  • Malfunctioning vehicle control modules
  • Interference from aftermarket accessories
  • Low battery voltage or power supply issues

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 harness and connectors related to the tuner/receiver 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 Tuner/Receiver

    If possible, test the tuner/receiver unit itself. This may involve swapping it with a known good unit to see if the problem persists

  5. 5. Check Power and Ground

    Verify that the tuner/receiver is receiving the correct voltage and ground. Use a multimeter to check for proper voltage at the connector

  6. 6. Inspect the SCP (J1850) Communication Bus

    Bus Integrity: Check the integrity of the SCP communication bus. Look for shorts, opens, or high resistance in the wiring

  7. 7. Signal Quality

    Use an oscilloscope to check the signal quality on the J1850 bus. Look for any irregularities in the waveform

  8. 8. Scan Tool Communication

    Ensure that the scan tool can communicate with the vehicle’s modules. If there are communication issues with other modules, it may affect the tuner/receiver

  9. 9. Check for Software Updates

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

  10. 10. Reset the System

    Clear the trouble codes using the OBD-II scanner and see if the code returns after a short drive. This can sometimes reset temporary issues

  11. 11. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued guidance on common issues related to the tuner/receiver

  12. 12. 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 the problem more effectively.Conclusion Troubleshooting OBD-II code U1165 involves a systematic approach to check for wiring issues, component functionality, and communication integrity. By following these steps, you can narrow down the potential causes and work towards a resolution