Techstream and 04B33

You should really read the entire thread that discusses the TSB & ECU Flash procedures before you begin.. There is a note about disabling Wifi before you update and a few other tips. Go back to page 1 : https://www.tacomaworld.com/threads/ecu-tsb-update.562550/. and expand the spoiler for

. Scroll to Step 27. Hopefully that will help.

 

I did it. Hurray. Nerve racking waiting for it but it’s updated to 04B33

 

Congrats! It is indeed nerve racking, I agree. Did you reset the DTC, LV, and AT? Follow those screen shots exactly, and you should find the settings. The truck runs really weird for the first 10 minutes, but it smooths out. The weird shifting mostly goes away with 04B33.

 

No I didn’t reset those. Am I screwed now

 

And I just drove it 5 miles

 

No not at all. I made a similar mistake and missed the LV Reset. What it does is tells the computer to forget everything it "learned" about how to run and shift. It will re-learn based on your driving how to behave. This was also noted in the TSB Bulletin from Toyota to perform these resets. Just hook it back up and follow the screenshots from the ECU thread.

 

Oh thank goodness. So just open techstream and the cuw file again?

 

No, you dont need the CUW file anymore. Just open techstream, connect to your truck, and find the screens shown in the ECU thread in Spoiler: DTC, Learned Value, and AT Resets

 

Ok thank you soooo much

 

This is just an assumption but I don’t have to do the whole routine again, Battery maintainer, all accessories off ect, do I?

 

Probably not the maintainer for the reset. But you do need the ignition set to ON, engine not running, and for good measure, I would have the heater/blower, radio, headlights all turned off.

 

Sounds good. Going out to do it now

 

I can’t find where to reset

 

See the screenshots.

 

Found it. Engine and transmission?

 

Yup. Just take your time. Click Transmisison, then the green arrow at the bottom. It should load the Tranmission Live tab. From there, you should see the "Reset Memory" Higlight it and click the green arrow. Then do the same for Engine Live, following the screenshots.

 

I did it but it’s been idling for 5 minutes and I’m not getting a rough idle

 

Take for it a short spin, it may shift clunky and weird. Drive it for at least 15 minutes, at various speeds, starts and stops.

 

I think I need to go in again and reset everything. I never got those symptoms plus

 

Under engine it says DTC’s incomplete although it let me clear them even though it was blank