I had this same issue at one time happen to me. When I took into the shop, the way it was explained to me was that the Indicator acts like a fuse. If the light is not on, then the ECT is not working, cause the system dosent know that the button is pushed in. Hope this helps.


'02 Taco stepside SR5 x-cab
2.7 4 banger
3" cornfed lift
16x8 ASA trs w/ 285 Dueller's
Gibson cat-back exhaust
4" Deckplate w/ K&N filter


YEA, I SAID IT!