Car is a 2015 XF AWD SC. Shortly after I purchased it two years ago I disconnected the small battery as per various posts to render the stop start system inoperable. Two days ago the system has come back to life. Small battery is still disconnected. Battery voltage on large batter is 12.4 v measure by a volt meter. Now I must once again use the eco button each time I start the car to turn this function off.

anyone have any ideas?

regards
Dennis

 

Surprised that with over 100 views no one has any suggestions as to how this might be possible. Anyone have a wiring diagram to see what might be in place on this circuit? Stuck relay?

regards
dennis