Track light on

Hi SKOOTER24,

We can help you with this information. (Engine size do you mean 1.5?) On the Yaris you have a switch make sure it is not in the off position. Check out the diagrams (below).
Let us know what happens and please upload pictures or videos of the problem.
(you will have to scan systems for codes) I am glad to help you, If there is anything else we can help you with please contact us again. This guide can help you with the codes.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Thank you for choosing 2CarPros. Cheers, Nick

I tried pressing it and it did nothing.

Okay, SKOOTER24,

You started vehicle running and pressed traction control button and light stays on regardless.
Now you have to scan to read any trouble codes in system (scan ABS system as well)
Check out the diagrams (below).
Let us know what happens and please upload pictures or videos of the problem.
Cheers, Nick

Okay, so I need to unhook the traction control switch and test those pins?

The first thing is to scan systems for codes (if you don't have a scanner parts stores read it for you for free, if there is a code snap a picture with your phone, do not erase)
Let us know what happens and please upload pictures or videos of the problem.
If there is no codes you have to remove switch and measure to verify if it is working.
Cheers, Nick