Can we do a software update after EGR cleaning job with TechStream

I don't know did it work I'm not understanding what's messing up here If you have a two-day license I guess you should be able to access the necessary files from TIS to upgrade everything in your car needs upgrading as far as computers and software goes I would think I've never had a TIS account or bought one so I don't know

 

Be careful. If not done correctly you may brick the ecu.

Never have done this myself but the help file suggests:

Calibration Update Check
Press the ECU Reprogramming button on the System Select display.

The Calibration Update Check screen displays whether or not there is a Calibration ID and update for vehicles with ECU's designed for Reprogramming. If there is an update, a link to TIS is displayed. TIS can be displayed by clicking the link.

And on step 4 of the next page

To perform reprogramming, click
the link to start TIS. When the target Calibration File on the TIS site is clicked, the file will be downloaded and the Calibration Update Wizard will start.

See attached

 

I think you are breaking new ground using the Techstream replacement software from Toyota. It seems to be just a few months ago Toyota announced the upcoming changeover to GTS+ Global Techstream Plus.

You should call Toyota support again.

 

Are you saying Toyota is not supporting ecu flashing for anyone using Techstream but the GTS+ software should work?

 

What we know for sure is that the TSB that was issued saying "if you have rough running in these circumstances, install this revised EGR valve" also says "and install this newer firmware revision too".

So it's clear Toyota thinks both things are worth doing if you have rough running in those circumstances, but that could be because the revised valve and revised firmware "need" each other, or just because Toyota expects both revisions to have some benefit to rough running in those circumstances.

One reason I tend to think it's the latter is that there's a different TSB too, seeking to address a different rough-running complaint in different circumstances, and that one said "use this revised intake manifold", and also said to install the (same) newer firmware version, too.

If you followed that TSB, you'd have the new manifold, old valve, and new firmware. If you followed the other TSB, you'd have the old manifold, new valve, and new firmware. If you happened to have had both complaints and followed both TSBs, you'd have the new manifold and the new valve and the new firmware.

And neither the manifold nor the valve identifies itself to the ECM as being the old or the new kind (the manifold has no electrical connections to the ECM, and the connections on the valve are only ECM outputs controlling the valve, no communication back). So the firmware doesn't know whether it's dealing with a new or old manifold or a new or old valve, and has to be able to work ok with either.

I actually asked Toyota to flash that firmware version for me on its own (because I was guessing it might include other improvements too, like a water pump control change that there's a European TSB about; I have no idea whether my guess was true). The only different behavior I've noticed with the revised firmware is the engine's initial idle RPM is a little higher when it's cold, and then drops to the usual idle speed once the coolant hits 30℃. Kind of like the "fast idle cam" old automatic chokes used to have. Which is a reasonable thing to do if you've got some roughness on cold startup, 'cause it'll probably be less rough at a little higher RPM, and for all I know there might not be any other magic in the firmware update besides that.

 

I meant did Toyota tell you Techstream no longer works for flashing ecus?

 

I'm guessing they don't want to help anybody using Techstream for anything now that they have GTS+ and it's presumably more resistant to bootlegging.

 

Are you still sure that it's not worth the $250 to let Toyota do your ECU update?

 

Yes, that's sort of the minimum precaution. At a Toyota dealer, they will have the battery connected, not to a typical battery charger, but to one of these, and it won't be set to charge mode but to "power supply mode", where it could try to hold the car at a stable 13.5 volts on its own if it had to:



Also, Toyota keeps issuing newer and newer TSBs like this one (I'm not even sure this is the latest), with longer and longer checklists of things to do to make sure there won't be any power glitches during the reprogramming. In this one, I'm talking about the red box on page 10:

https://static.nhtsa.gov/odi/tsbs/2019/MC-10164330-9999.pdf

If I remember right, there's a Prius-specific version that adds even more to the checklist, like pumping the brakes beforehand until the pump runs (so it'll be less likely to run during the reflash), and pulling a few key fuses. When I take mine to the dealer for any reflash, I pull fuses to any of my mods myself, since the dealer won't know about them.

Because Toyota puts all of that thought into checklists of precautions to avoid bricking the car, I still take mine to the dealer and pay the hour of shop time whenever there's a reflash I want. I'd just rather let any possible brickage be their problem.

 

I haven't seen any real new updates for the 2013 and the 2010 I think has all the same firmware updates is the 2013 so there's always that I guess all this other stuff is for these lot newer versions or are all these updated checklist what people need to do to like a 2010 that hasn't been done ever spending the garage all its life or on the road and never seen the dealer for anything No one knew it needed it and now when we go to flash it we have four pages of stuff that has to be done? Where before there was only a half a page and how many of those cars got bricked probably actually quite rare but it is interesting how they keep upping the antie on all the safety precautions..

 

I just replaced EGR valve on 2011 Prius (with genuine new Toyota part). Called local Toyota service department and asked if the new EGR valve needed to be updated (firmware, programming, or whatever). They put me on hold for a few minutes and then came back and said nothing was needed.

 

I don’t wanna waste my time on reading all the above but I hope you’re not gonna use that fleabay $20 knockoff cable. You can break your Ecu like 50% guaranteed.

$70 spent on techstream could buy you official egr firmware flush from willing Toyota dealership.