ECU TSB Update

No problem! I was surprised to see that release. Now, the 2016 through 2018 ATs need to get their due.

 

Tried doing the update but my battery was 0.1 volts under the requirement . Guess I’ll throw the tender on and try later.

 

I have had that a few times.

Just start and let the engine run for a minute or two. Be sure that your headlights and seat heaters are off. Those resistive drains seem to affect the battery the most. Low speed fan and radio don't seem to bother it at all, but could help if you're close.

With the 11.8v requirement in V14 and the 12.0v requirement in V15, it just completely assures that there will be enough capacity to get through the 10min flash on the ATs.

 

Was right after I drove it home for lunch. Turned everything off, I’ll try again tonight.

 

Just having your lights on or seat heaters at shutdown is enough to boot it below the limit. It's touchy, but helpful considering the alternative.

 

Yeah def be sure stuff is all turned off, fans, lights, radio, etc.

 

Been lurking for a few weeks after purchasing a 2019 DCLB TRD OR with 11k miles. I purchased VF Tuner pack from OV Tuning but was hesitant to just dive in so I have been absorbing as much info as I can. Yesterday I decided it was time to flash my ECU from 04B31 to 04B33. I had downloaded V14 of Techstream along with the CUW file. At first attempt my battery was below the 11.8v threshold. I let the battery charge a few minutes I tried again and the flash was successful. Thank you to those that have contributed to this forum...sure has been a big help!

 

You're welcome!

Enjoy the new tunes!

 

@tonered, not sure how often that map is updated and can’t see that I can update it on my phone but Jones Junction Toyota didn’t give me any issues when I asked for The 92-20 TSB for my 20 (under warranty), they also did an alignment with numbers I asked for. Here is the address
1508 Belair Rd
Bel Air,MD21014

 

I have 04B04 do I need to update with the new tsb on the 1st page ?

 

Ok sometimes I get confused lol

 

Wonder what the next tsb for my truck will be 04B05 ??? Maybe lol

 

We’ve been wondering when that’ll come out since the 16-17 MT got a new one last year lol

 

Unless it’s safety related, I could see Toyota not bothering with updating 04B04. The updates for the MT’s were a safety risk. 2016/2017 Trucks are 4-5 years old and most are probably out of the factory warranties and many on second owners by now. Why invest the time and $ if you’re a corporation unless there is a safety/liability risk?

 

i guess we will see if they are gonna discontinue the tsb updates for 2016\2017 AT then then need to send out a notice so we all aint twittling our fingers wondering

 

If you’re Toyota, wouldn’t you rather have the customer buy a newer truck with the updates vs. handing out freebies? Unless there is a safety/liability risk, I bet there will be no update.

 

yeah kinda feels like it has come to a end but never know thats why we call em surprises lol

 

Can anyone confirm the latest ECU version for 2020 ATs? I thought it should be 04B81 from TSB-0092-20, but I notice the latest VFTuner includes 04C20 in the 2020 ECU folder.

 

04c20 is a 2021 ecu

 

That's what I thought. Thank you.