It's more likely a quirk of the version of Techstream I'm using, or the cable, or both. (Do a search for a thread titled Prius Alarm.) I suspect that in the worst case scenario Toyota has found a way to lock that option to make it harder for car owners with Techstream to reprogram it, I doubt they removed it. Some gen 2 users here have gotten their alarm systems up and running using Techstream, and it seems to work in Gen 3. RMB: My understanding of the situation is that Toyota generally installs the same tech in all trims of a given model, but only activates the alarm system (and some other features) in higher end trims to encourage you to buy a more expensive car. All you get is the Techstream installation file, no notepad with the key number, no cracked main menu file to install and replace the original main menu with, nothing that will actually make it function. I did note that the (theoretical) Xhorse cable had access to more features than the Tactrix cable does.īad news regarding trying an older version of Techstream: all downloads of versions prior to v12 or so-the ones that are easy to find at least-have been gutted. I'll share some screenshots that will hopefully be helpful. In my case it didn't: the interface was the same as the newer version with no customization button, and the Tactrix cable had the same limited access.

I started out using Techstream v.12.20.024, and then based on reading a thread in a Sienna forum I switched over to v.12.10.019, because several users said that that version restored the customization button. There is no customization button on Techstream, it entirely refuses to access the anti-theft system ECU, there is no customization button, and my access to all other functions is purely passive: all I can do is look for error codes. I downloaded the driver for the Tactrix cable in Windows, and it connects to Techstream and is usable.sort of. (The head of the cable is brand new and in perfect shape, by the way.) I have a Macbook, so I also installed VirtualBox where I'm running Windows 7 (32 bit) so I can run Techstream. I recently bought a Tactrix cable so I could turn on the anti-theft system.

Tactrix openport 2.0 revisions