Was driving home last night with family in car IS200 2001 my little boy said he was cold, my wife undid her seat belt took off her cardigan and placed it over him. At the time we where doing 70 mph on cruise, at exactly the same time as my wife undid her seatbelt the cruise control let the speed drop, the green light stayed on but the speed setting was lost. What ever i did i could not get the cruise control to set again, also the "D" gear indicator went off.
Switch off and restart all is well but it does not like pasenger undoing seat belt whilst on cruise control.
Regards
Russell.