ECUTek DTC/Readyness Analysis....
 

Very simple analysis. If you have an ECUTek tune, does your car report at least one readyness check as incomplete? You have to make sure you've driven at least 100 miles since your last ECU reset, flash, or battery disconnection.

Reason for this is that inspection stations will check the readyness of the ECU systems as part of the emissions testing. If one system is reported as incomplete, you won't get a sticker.

The way to test for this is with an OBDII scanner. Torque has a "gauge" for showing this information in real time. I believe ECU scanning software for the OBDII also have ways of showing this as well.

So let us know in the poll above if you have this issue. Please also designate which vendors tune you have. I'll separate them out as best I can off the top of my head.

Pictures of your readout are also welcome!

I should note, this doesn't mean you have a check engine light. This is a separate check. Just because no lights come on, doesn't mean you don't have this issue.

I think last time I did a DTC check on EcuTek no codes came up. I will verify tonight before voting.

Will heck my torque after work

Using Visconti's latest pumpgas tune since it came out, Torque Pro claims that my Evaporative Sys readiness is incomplete.

I'll switch to Perrin's latest Stage 2 tune and report back this weekend when I have a chance to do that.

Curious about this for when it comes to smog time. 5 years, but still...


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Make sure to use a j2534 connector and tis to get all the codes. There are tons of things regular obd2 scanners don't show you.

Yea I'm more concerned with Readyness. My car personally shows O2 System as incomplete.

I find it weird that people on the same tune have it show ready and not ready, like its random then?

very concerned about this. I will not be buying a tune until this is cleared up?

ill def check this out for you because im due for an inspection soon but i do have a cat thats deleted. I know on torque everything reads ready but 02 something and evap system but i just did a reset yesteday and ive only drive about 60 miles. I wonder if e70 will affect this tho

make sure to follow the parameters for an obd2 drive cycle:

http://www.aa1car.com/library/us796obd.htm

in my old car, I drove hundreds of miles after a reset and there were two parameters that were still not ready. on the way to the inspection station, i forced myself to drive at 55mph and it ended up passing.

Lots of beautiful places to live in Florida. jussayin.

I'm not sure where that drive cycle came from (maybe some service manual somewhere). Every diagnostic monitor is different. Some are continuous monitors, like misfire, and some aren't, like the evaporative monitor. The requirements under which they must run vary with model years. A few people behind closed doors negotiate details with CARB officials. The ones that show up on the scantool are a tiny portion of all the ones inside the ECU. Most of these are handled directly by communication between CARB and the manufacturer. The customer never deals with them. Here are some examples of monitors you see on a universal scantool:

Typically an evaporative monitor might work in two ways. It looks at changes in pressure across the gas tank as fuel temperature changes (passively looking for leaks). This can happen while the engine is running or when it shuts off. The second way is when the vehicle has a pump to see if the tank holds pressure or not. I'd have to look in the service manual to see if the FA20 uses a pump. Evap monitors often have very specific entry conditions to work, based on fuel temperature & engine run time.

The Catalyst monitor uses an oxygen storage capacity model to see how much oxygen the cat stores as the mixture switches from rich to lean. It uses the rear o2 sensor to calculate the storage capacity. Storage capacity & catalyst efficiency decreases linearly with thermal aging. If the modeled value falls below criteria, you need to force step changes in the target AFR to test the oxygen storage capacity. If it fails the second test, the monitor will throw a code. When one or both of these tests run, the monitor will complete.

Fuel system monitors might look at fuel trims under different conditions.

O2 sensor, MAF sensor, and other sensor rationality checks typically compare the sensor value to some modeled value.

Misfire is a continuous monitor. Usually it calculates crankshaft acceleration. If that's erratic enough times, it sets a code.

Here's something to consider. The diagnostic monitors are tested on a specific drive cycles (EPA Highway mode, Unified mode, etc). How often they run in the real-world is a separate but related issue that causes friction between the OEM's and CARB. If the monitor runs too often or is too sensitive, it will diagnose incorrectly and throw codes. That will really piss off customers. For example, a misfire monitor is sensitive to rough pavement. O2 sensor monitors depend greatly on rpm and load. There are things called "monitor performance ratios." A performance ratio is basically the number of times the monitor ran vs the number of times it "should have" run. If the ratio is too low, CARB will pursue action and could fine the OEM.

If you took two stock cars with stock tunes and reset the monitors, they would still complete at different times depending on ambient conditions and the driving style. It's not necessarily an issue with aftermarket tunes... maybe changing the MAF scaling might or might not affect certain monitors but I wouldn't get too worked up about this.

@arghx7

I didn't even know you were still reading this board. It's good to see you.

And thanks for making a post I can understand. :)

Good post @arghx7

400+ views and 8 people voted haha....

Ah crap you just reminded me I needed to try my Perrin flash. I'll do that now and put on some miles to get a sufficient read tomorrow.

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Not tuned yet, but interested in seeing the results.

How did it go?

Only got to drive for around 20 miles, and my gas tank was full - I believe the Evap Sys readiness only works when gas level is between 1/4 and 3/4 so I'll check later in the week. I'll also check at cold start, since that's apparently when the Evap Sys readiness is performed.

That said, I read up on NY Inspection requirements and I'll need two incompletes before I'd get a fail. MA probably has a similar deal?

I believe they don't allow any.... MA is a CARB state.

NY as well. Just found this - http://www.vehicletest.state.ma.us/m...emissions.html

You're ok with one incomplete for MY2001+

Still, I'd like to find out why some of us have these incompletes, even after following a proper drive cycle procedure. Which one is incomplete for you?

O2 System.

I have not voted yet... I'm on BRZedit Personal Tune..

I have not voted because I'm not sure about what i am seeing with techstream using the generic OBDII readiness check screen. It seems like evap never flips to complete and catalyst monitor toggles back and forth... I have not checked to see what difference engine on vs off makes.

I never get any CEL's and it should only take 2 drive cycles to complete all checks.

Also, A drive cycle is defined in the service manual as 30 seconds of idle, and 5 minutes of driving at 25mph or more. Speed can drop bellow 25mph during the test.. total time just needs to be 5 minutes or more.

You can also force the ecu into fast test mode (with techstream) that will complete all tests in a single drive cycle.

You also need to be between 1/4 and 3/4 of a tank for fuel in order for the evap readiness to complete. If you are outside of that range, it'll stay incomplete. Waiting to burn off some fuel this week before testing it out on my second tune, but I definitely was at half tank when I performed the test with my first one.

I flashed back to stock ROM, problem went away. Everything clears.

On Perrin's stage 2 pump gas tune. All clear and complete.

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The O2 sensor monitoring is also used for the Catalyst monitoring. Having the O2 saying "NOT READY" will result in a Catalyst system "NOT READY" as well. With 2 systems not ready, there is zero chance of passing in most states.

I like that this thread was started @2forme.

I'm wondering if it makes any difference as to which type of tune people are using whether it be NA or FI... If you check off YES could you post which kind of tune you are using?

I have a Visconti n/a pump gas tune and all my monitors are complete.

@2forme, Visconti boosted tune, all show either complete or unavailable, NONE show incomplete.

never had this problem.

After taking my wife's car (2004 camry with low km's) for an emissions test in Ontario (Canada, not California) and having it fail with 4 systems not ready then pass 48 hours later after nothing more than a simple drive I bet most of these not ready symptoms are because of driving conditions, not the tune.

Her car was "not ready" on O2, catalyst, evap and something else. She drives it every day, but all city streets and only about 5km each way to work. I took it out, did the 2.5 minutes of idling in drive with AC/defroster on, about 5km on the highway then city streets back, took it back the next day and it passed on all sensors.

Ontario lets cars have a conditional readiness pass if they fail two tests 24+ hours and 30+ km's apart with the same sensors (or less) not ready. If you're selling the car they still do a two speed idle tailpipe test. Any DTC codes or MIL are an automatic fail, even if it passes the readiness test and two speed idle tailpipe test.

I'd suggest anyone getting sensors not ready do similar drive cycle and see if it helps. No clue how to do the idle in drive thing in a manual, and the techs doing the test had no idea either.

I'm not too concerned on my car because Ontario doesn't require testing until the car is 7 years old (or being sold), but it might help people in the states that require more frequent testing.

I've seen these issues on a car driven more than 700 miles since reset. If that's not enough of a drive cycle, I don't know what is....

Why not just reflash back to stock ROM before taking car in for emissions? Am I missing something?

Well that would mean no catless headers for just one example.



This is a big issue in general. Many areas require a clean OBDII check yearly (mines due in 4 months), paying $900+ for a tune and failing emissions will not make many happy customers.

Can you imagine if a guy bought a tuner $5k Vortech kit and fails emissions with no CEL or visual inspection, just from a scan station?

It doesn't matter how many miles it was driven, certain conditions have to be met before the ECU will even check the readiness state.

My wife's car is driven at least 20km daily, never sits longer than over night without being driven and still failed on four not ready sensors.

Idling with the AC/defrost on then a 5 minute highway drive got it through with all sensors passing.

If you have techstream I believe you can force it to check all sensors on the next drive, but I'm not positive.

Reviving an old thread! Since my car never came with an inspection sticker when I bought it, I got pulled over yesterday and a warning about it. I went to the Toyota dealership not thinking at all about my Ecutek stg 2 tune from FA20club and I failed the emissions test, lol. Catalyst: NOT READY, Evap Sys: NOT READY, O2 Sensor: NOT READY. That would be a fail on both the car and my part for not flashing back to stock.

I hope there is a solution for when we go with a catless header. I don't think swapping the header on and off is a great long term solution for inspections.

I've got an FA20club tune on my car currently as well and I have O2 sensor not ready, Evap Sys not ready, but the last time I had this issue with other tuners, it went away after prolonged driving, so I'll check this again once my tune is completely dialed in and I've had a chance to drive it a while.

How long has your tune been on the car?

About a week, and its the first initial tune Toni sent me. I haven't even gotten my revised one yet. I'm just flashing back to stock and going back to Toyota today and it should be fine. I've still got the stock header, but that will be changing soon.

I was less than a quarter of a tank of gas during that inspection. Thankfully the dealer is stupid and didn't pick up on the Ecutek tune. I said I'll have my "aftermarket" parts checked.