Ecu

Reprogamming an ECU. Whats involved? Hows it done? Can it be done at home in my garage or does it need to be done at a dealer?

 

you would need an obd 2 can b pass through device and laptop .about 5000 bux for a cheapie, and the software subscription through toyota is 1800 a year last time i checked. i have one but only have gm, ford and dodge subscriptions. take it to the dealer, 75 to 100 bux for a reflash.so to answer directly. yes it can be done at home.is it worth it? nope. second question. how is it done? the dealer downloads the latest software versions directly to there pass through scanner. straight from toyotas service website. its usualy by vin number as there are different emisions standards and equipment form truck to truck of the same years,ie federal versus california emisions. or auto versus manual.you get the point.anyway that software is then transfered to you ecu thru there scanner with the new paramiters and fuel mapping.the pcm is then automaticaly placed into a learn mode.so when you get it back it will act strange.the computer is trying to relearn cam/crank position. and also adjust to the way you drive. the more you drive it the better it will get.