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

The ODBII 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.

The severity of ODBII code U1200 SCP (J1850) Invalid or Missing Data for Seat Motion / Control is generally considered moderate.

Common Causes For: U1199 SCP (J1850) Invalid or Missing Data for External Access (Doors)

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

• 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

Common Troubleshooting Steps

When dealing with OBD-II code U1200, which indicates “Invalid or Missing Data for Seat Motion/Control” on a vehicle using the SCP (J1850) protocol, there are several common troubleshooting steps you can take to diagnose and potentially resolve the issue. Here’s a structured approach:

• 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.
• Inspect the Wiring and Connectors: **Visual Inspection: Look for any damaged, frayed, or corroded wires and connectors related to the seat control system.
• **Connector Integrity: Ensure that all connectors are securely attached and free of corrosion or dirt.
• 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.
• **Power and Ground: Ensure that the seat control module is receiving proper power and ground signals.
• 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.
• 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.
• **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.
• 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.
• 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.
• 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.
• 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.