Possible causes include:
- Faulty wiring or connections between the ECM and the ACC
- Failure of the ACC module itself
- Incorrect calibration or programming of the ECM or ACC
To troubleshoot this issue, you should:
- Check the wiring and connections between the ECM and ACC for any damage or corrosion.
- If no issues are found with the wiring, you may need to have the ACC module tested or replaced.
- If the ACC module checks out fine, you may need to have the ECM recalibrated or reprogrammed.
It's recommended to have these checks and repairs performed by a qualified technician or mechanic to ensure proper diagnosis and resolution of the issue.
