Ecutek: Manual cars can change maps while driving. Automatic cars have to be stopped to change maps or they can use the app to change maps while driving.
Car can be running or key in on position.
Hold the CANCEL button until tachometer needle points to 1. Then adjust the cruise control switch up or down, and the tachometer needle will point to the map number selected (1-4).
UpRev: Both automatic and manual cars can change maps while driving.
Hold cruise control switch DOWN while tapping CANCEL the amount of times corresponding to the map number. You will see SET blink on the dash.