How to check for Tune

That post is a little hard to follow, but if you are implying I'd change to the stock ECU before taking my truck to the dealership if I'm worried there is a problem, then yes. That would be the plan.

 

You stated you don't understand why people would be concerned with failing emissions, and are more concerned about denied warranty work for a blown engine. The answer is:

because failing emissions is far more likely, even inevitable for some, to happen than blowing an engine. If someone wanted to conduct empirical research, we'd learn that outside the introduction of outside variables (i.e., supercharger), aftermarket tunes have proven to be reliable, and an outcome of blown engine has been statistically insignificant, possibly even non-existent.

My implication that you could just swap the ECU prior to taking your truck in for warranty work just states that the solution to both problems is the same, so no need to rank either of the potential scenarios as more likely or not. But just answering your question anyways. Failing emissions is more likely, that's why people are concerned.

 

My point is only you can retake the emissions test so the most you'll be out is money and your time and effort. You can't retake the "warranty test", so while less likely the consequences are much more severe. If all I'm worried about is emissions I'm not getting a second ECU, at least not until I fail the test.

 

I think both sides have solid arguments but are saying two different things. Your point is just as valid as the people saying it’s far more likely to fail an emissions test….but they are entirely different points being made.

 

That's actually worse. The ECU does have a small event log (so many miles since... x number of engine starts...etc) If you bring in a warranty issue that requires a dealer to investigate the ECU history, they will be asking questions when they find a blank slate, especially if the section that doesn't clear with your consumer-level reader is also empty.

And if your warranty issue is a simple non-trouble code repair (which will be 99.5% of the time) then they have no reason to be digging into the ECU.

Its a mountain out of a molehill. Until documented cases of not-supercharged tunes borking the engine start showing up (in ANY Toyota/Lexus, not just the Tacoma), dealers aren't even looking for it. They don't care.

 

Don't have KDMax (OTT here) and just passed emissions earlier this month up in Washoe County

 

Why would a used ECU be blank?

 

Colorado adopted the California Air Resources Board emission testing standards. Part of that adopted standard is a certification of an approved ECU tune. If a tuner gets their tune CARB certified then any state that adopted CARB standards will pass that tune.

 

I think both scenarios are valid points to be clear. I was just answering your question. People don't want to be out time and effort, and emissions testing is inevitably coming for some people; that's why they're concerned. If you fear denial of warranty claim, you should be equally as concerned, whether its likely to happen or not. Getting a 2nd ECU doesn't sound like the ideal solution for either scenario to me honestly, but it seems it was the only option for OP at the time. Hopefully the tuning community will adopt some workarounds to be able to flash back to stock everything, leaving no trace of any ECU changes, but its probably going to take a lot more cases coming up before that happens. As we sit right now, the majority of the market doesn't have to deal with emissions concerns.

 

Is that in CO or CA?

 

NV, I was just answering a question about testing in southern NV

 

Yes I know, I didn't think I needed to give a step by step process

 

Sorry, it just seemed like you didn't know.

 

So how does one know what the “stock CVN” is?
Is there a list?

 

In my other thread Adam, my tuner, says he could possibly find it but it would take some digging.

The other option is you find a stock ECU running the same program as yours and pull it.

 

I looked up my “CVN number”
What I’m asking is how does one find out what it should be of the truck hasn’t been tuned

 

You could try to find a truck similar to yours, that you know is stock, plug into the OBD, pull the CVN, and compare it to yours. That is a surefire way to verify that your CVN is stock. Other than that you could try hitting up a local tuner who might know.

Unfortunately, unless Toyota decides to release its CVN database, this info seems to be pretty hard to find.

 

I understand now. Thanks. Mine does have an OTT tune…..was curious what it would read if not tuned.

I found the CVN number, rather easily with a scanner,

 

E2EB5C1C for your truck.

 

I don't care about emissions testing since I dont live in a nanny state. I do however care about having a major issue and then a dealer denying me for a warranty claim due to a tune that I don't realize I have. I'm just going to assume I don't have one since there is no good way to tell evidently.