WOMS
U code network Medium severity

U1200 SCP (J1850) Invalid or Missing Data for Seat Motion / Control

The OBD2 code U1200 SCP (J1850) indicates that there is invalid or missing data related to the seat motion or control system, which may affect the operation of the seat adjustment features in the vehicle

Definition

The OBD2 code U1200 SCP (J1850) indicates that there is invalid or missing data related to the seat motion or control system, which may affect the operation of the seat adjustment features in the vehicle

Common causes

  • Faulty seat position sensor
  • Damaged wiring or connectors
  • Malfunctioning seat control module
  • Communication issues in the SCP network
  • Corroded or loose electrical connections
  • Software glitches in the control module
  • Power supply issues to the seat control system

Common misdiagnoses

  • Faulty seat position sensor
  • Wiring issues or shorts in the seat control circuit
  • Malfunctioning body control module (BCM)
  • Incorrectly calibrated or faulty power seat motor
  • Issues with the vehicle's CAN bus communication
  • Faulty connectors or terminals related to the seat control system
  • Software glitches in the vehicle's control modules
  • Problems with the seat control switch or panel

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 the Wiring and Connectors

    Visual Inspection: Look for any damaged, frayed, or corroded wires and connectors related to the seat control system

  3. 3. Connector Integrity

    Ensure that all connectors are securely attached and free of corrosion or dirt

  4. 4. Check the Seat Control Module

    Functionality: Verify that the seat control module is functioning properly. This may involve testing the module with a scan tool or replacing it if it is suspected to be faulty

  5. 5. Power and Ground

    Ensure that the seat control module is receiving proper power and ground signals

  6. 6. Test the Seat Position Sensors

    If the vehicle is equipped with seat position sensors, check their functionality. These sensors provide data to the control module, and if they are malfunctioning, it can trigger the U1200 code

  7. 7. Inspect the SCP (J1850) Communication Network

    Network Integrity: Check the integrity of the SCP communication network. Look for any shorts, opens, or other issues in the wiring that could affect communication

  8. 8. Scan Tool Communication

    Use a scan tool to check if other modules on the SCP network are communicating properly. If other modules are also having communication issues, it may indicate a problem with the network itself

  9. 9. Check for Software Updates

    Sometimes, manufacturers release software updates for the vehicle’s control modules. Check if there are any updates available that address known issues with the seat control system

  10. 10. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the scan tool and 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 U1200 code or seat control issues for your specific vehicle make and model. TSBs can provide valuable information on known issues and fixes

  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 access to specialized diagnostic tools and resources. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the U1200 code. Always refer to the vehicle’s service manual for specific procedures and specifications