u1204 scp j1850 invalid or missing data for steering column
OBD2 Code: U1204
Description: SCP (J1850) Invalid or Missing Data for Steering Column
Definition: This code indicates that there is a communication issue on the SCP (Standard Corporate Protocol) network, specifically related to the steering column. The data being received from the steering column module is either invalid or not present.
Typical Severity: Medium
Common Causes
Common causes of this OBD2 code include:
- Malfunctioning steering column control module
- Wiring issues in the steering column circuit
- Communication errors between modules on the SCP (Standard Corporate Protocol) network
Common Misdiagnosis
Description: SCP (J1850) Invalid or Missing Data for Steering Column
Common Misdiagnosis: Replacing the steering column control module without verifying the integrity of the wiring and connections.
Common Diagnostic Steps
OBD2 Code: U1204
Description: SCP (J1850) Invalid or Missing Data for Steering Column
Common Diagnostic Steps:
- Verify the code using an OBD2 scanner to ensure it is active.
- Inspect the wiring and connectors related to the steering column for any signs of damage, corrosion, or disconnection.
- Check the power supply and ground connections to the steering column control module.
- Test communication lines (SCP/J1850 bus) for continuity and proper voltage levels.
- Use a multimeter to measure resistance in relevant circuits; compare with manufacturer specifications.
- Examine other modules on the network for additional codes that might indicate a broader communication issue.
- If applicable, update or reprogram the steering column control module software as per manufacturer guidelines.
- If no faults are found in wiring or connections, consider replacing the steering column control module after verifying all other components are functioning correctly.