Hi everyone,
I’m looking for help with a cruise control retrofit on my Ford Focus MK3 1.6 Ti-VCT (manual transmission).
I retrofitted cruise control using the steering wheel / cruise buttons (swapped the steering wheel, mechanically/electrically plug & play). I enabled cruise control in the BCM, and the cluster shows the cruise control indicator normally.
Symptoms:
* Cruise control can be switched on and works at first.
* I can press SET and it holds the speed.
* But after about 4 seconds the car goes into limp mode.
Diagnostics (FORScan):
The main fault stored in the PCM is:
* P061B:47-2C – Torque calculation: internal fault
* Text mentions something like “monitoring/safety µC fault”
* Status: intermittent
* Freeze frame shows e.g. (see screenshot): module voltage ~14.5 V, closed loop, speed ~33 km/h, etc.
Important: The fault only happens when I activate cruise control.
If I drive normally and don’t use cruise control, it does not go into limp mode.
Additional info:
* In FORScan under “Configuration and Programming”, the PCM only shows AS BUILT (no easy/plain-text configuration menu) – see screenshot.
* Adapter: VLinker (should be stable).
Has anyone seen this before or has an idea where to start?
I suspect something related to clutch signal / brake signal / plausibility checks when cruise control is active, but I’m not sure what to check first (e.g. clutch switch present/adjusted correctly? brake switch A/B?).
Thanks a lot!