DIY Cruise Control FAQ (2006-2010 Yaris)

[magnum23]

Ok, I checked again and there is no voltage reading, I tried the same with another plug in the wiring and got a 12v reading, I think there is no voltage getting to the CC switch thorugh the plug.

[CTScott]

Originally Posted by magnum23

Ok, I checked again and there is no voltage reading, I tried the same with another plug in the wiring and got a 12v reading, I think there is no voltage getting to the CC switch thorugh the plug.

OK. The next thing to check is if the ECM pin is actually there for the blue cruise control wire. You can remove the connector (you press in on the gray part and then lift it to release the connector). If you look in the hole side of the connector, you will see that some holes have metal visible and others do not. Check the pin circled below (note that the connector in this photo does not have visible metal, so it is lacking the pin for cruise control):

Conn A21 - Photo.jpg