I recently installed cruise control using a complete kit from a German supplier, the installation went well considering the entire dashboard had to come out in order to access pin 10 on the ECU plug and only one spare screw!

Anyway whilst driving to Edinburgh the cruise worked perfectly until I was crossing the moors in southern Scotland at night, as soon as the outside temperature dropped to 4°C the frost alarm on the dash flashed up and the chime sounded, this also triggered the loss of cruise control, the ASR light came on and the revs dropped to idle and would not respond to any throttle input. I coasted to a halt and turned the engine off, pulled the key then restarted it. Everything ok again.

Has anyone else ever come across this weird behaviour before, if so how did you fix it? Cruise worked perfectly again the next day on the drive back to Brighton.

Wonder for some resason cruise control kit is being disabled due to low temp signal. Sounds like a safety feature to stop you belting on on icy roads. Not sure why car would go to idle though unless itrs confusing the ECU.

Alasdair