WOMS
U code network Medium severity

U1162 SCP (J1850) Invalid or Missing Data for Digital Audio Tape

The OBD2 code U1162 SCP (J1850) indicates that there is invalid or missing data related to the Digital Audio Tape system in the vehicle's communication network

Definition

The OBD2 code U1162 SCP (J1850) indicates that there is invalid or missing data related to the Digital Audio Tape system in the vehicle's communication network

Common causes

  • Faulty wiring or connectors
  • Malfunctioning Digital Audio Tape (DAT) unit
  • Issues with the vehicle's audio system
  • Corrupted data communication between modules
  • Software or firmware issues in the audio system
  • Low battery voltage or power supply issues
  • Interference from aftermarket audio equipment
  • Faulty or damaged vehicle control modules

Common misdiagnoses

  • Faulty audio system components
  • Wiring issues or shorts in the audio system
  • Malfunctioning vehicle communication network
  • Incorrectly configured audio settings
  • Defective or incompatible aftermarket audio equipment
  • Issues with the vehicle's battery or power supply
  • Software glitches in the vehicle's control modules

Troubleshooting steps

  1. 1. Check for Additional Codes

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

  2. 2. Inspect the Wiring and Connectors

    Visual Inspection: Check the wiring and connectors related to the audio system and the SCP (Serial Communication Protocol) bus. Look 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 Digital Audio Tape (DAT) Unit

    If the vehicle is equipped with a Digital Audio Tape unit, ensure that it is functioning properly. Test the unit to see if it plays audio correctly and responds to commands

  5. 5. Check the SCP Communication

    Use a scan tool to monitor the SCP communication. Check if the audio system is communicating properly with the vehicle’s network

  6. 6. Look for any interruptions or irregularities in the data being transmitted

  7. 7. Inspect the Audio System

    If the vehicle has an aftermarket audio system, ensure that it is compatible with the vehicle’s communication protocols. Incompatible systems can cause communication errors

  8. 8. If possible, revert to the factory audio system to see if the code persists

  9. 9. Check for Software Updates

    Check if there are any software updates available for the vehicle’s audio system or the vehicle’s ECU (Engine Control Unit). Sometimes, manufacturers release updates to fix known issues

  10. 10. Clear the Codes

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

  11. 11. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U1162 code or the audio system for your specific vehicle make and model. Manufacturers may have issued guidance on how to address this issue

  12. 12. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or an automotive technician who specializes in electrical systems. They may have access to advanced diagnostic tools and resources

  13. 13. Check for Ground Issues

    Ensure that all ground connections related to the audio system and the SCP bus are secure and free of corrosion. By following these troubleshooting steps, you should be able to identify the root cause of the U1162 code and take appropriate action to resolve the issue