ECU TSB Update

The official USA market 2019/2020 ECU update TSB is T-SB-0092-20

https://static.nhtsa.gov/odi/tsbs/2020/MC-10181772-9999.pdf

Just hit nhtsa website today.

 

Thanks for posting that up. It will get that added to the 1st Post also.

 

The 1st Post was updated.

-- Added 2019 / 2020 US TSB.
-- Added A/M HU and Maestro warning.
-- Added TS Critical Update fix (shut off wifi).​

Thanks for all the help!

 

I am pretty comfortable with this stuff but I have a question about AT Calibration ID. I see it referenced above as "04A60 updated to 04A61" when applying the TSB update. When I pulled the ECU IDs for my truck I got 896650401100 for my Transmission Calibration ID. My Engine cal ID looks more familiar, ending in 04B0100 so I expected the transmission cal ID to be similar format. Is there more to this?

 

04B0100 is 04b01 which is a super early 2016 calibration. Definitely upgrade to 04b04

 

Yes, I assumed that it was probably the factory calibration from original manufacture. I am more concerned about the transmission cal ID. Will flashing this file, for example, update both the Engine and the Transmission ECU software to the latest ECU ID 04B04 & 04A61?:

I think that maybe I do not understand how the Engine and Transmission ECU Cal ID's are related.

 

There isn’t a trans specific cal. Much of the trans is controlled by the ecu. 04b04 is the latest for your truck. 04a61 is a newer model year and incompatible.

 

Ah, so there is no separate transmission cal ID update file to flash? I don't know why/how I got the idea in my head that there was two ECU cal ID's to update per vehicle, one engine and one transmission. When I saw that the updated .CUW file for 2016-2018 AT trucks was 04B04 & 04A61, I thought that meant the 2016-2018 trucks had an Engine ECU ID of 04B04 and transmission ECU ID of 04A61 (if updated). I understand now that there are two different ECU ID's for different ECU's on MY2016-2018 based on what ECU they have in them, assuming that the later year(s) have the 04A61 cal ID (if updated). If I am wrong, hopefully someone will correct me.

@Shellshock thanks for the replies and getting me straightened out. Appreciate it!

 

these are what we know about. There’s also a 04b33 and a couple foreign calibrations not in my list.

2016 / 2017:
04B04
04B14

2018:
04A61
04A70
04A71

2019:
04B30
04B31
04B40
04B41

2020:
04B80
04B81
04B90
04B91

 

And the 2021s.

 

Can't connect. Win10, Tactrix cable, 2020 Tacoma OR.

 

Did you select the interface in techstream?

 

Does 2020 require Techstream ver 15?

 

No, I have a 2020 and have no issues.

 

I did now, thanks.

 

Install the Tactrix drivers and select the Tactrix interface in the Setup menu.

 

Am I blind or is the TSB file for the 2016 MT missing? I see the PDF...???

 

^^ That guy?

 

HAHA, thanks.

 

I just double-checked the laptop I used to flash and that file is a match. I'm no TS expert though so I'm just assuming since you're '16 OR MT you should be g2g with that. It seemed to work for me, though, coming from 04B11 based on this post.
Remember to reset DTC and LV too.