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fredmertz · 02-12-2006, 02:54 PM

Has anyone here used a hand-held tester to change the Prius electronic system settings? If so, which one has worked for you?

jeromep · 02-13-2006, 03:51 PM

A good question, however the reality of Prius ownership is that there are very few things you can do with the programming of the vehicle. Aside from various user editable things, such as the backup beep, seatbelt warning and some others, which are documented here if you search, the rest of the vehicle is basically not accessible to the owner.

Only Toyota service departments with the Toyota Handheld Tester (THHT) have access to the computers directly. Even then, there are limits to what they can do.

All software updates that Toyota publishes are installed into the Tester and then the tester interfaces with the vehicle to perform the update. It isn't all that different from flashing a modem with new software, however if done improperly, the results are just as disasterous and a whole lot more expensive.

Would you be willing to share your intentions?

02-13-2006, 03:51 PM	#2
jeromep Join Date: Dec 2004 Location: Eastern Washington State Posts: 821 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	A good question, however the reality of Prius ownership is that there are very few things you can do with the programming of the vehicle. Aside from various user editable things, such as the backup beep, seatbelt warning and some others, which are documented here if you search, the rest of the vehicle is basically not accessible to the owner. Only Toyota service departments with the Toyota Handheld Tester (THHT) have access to the computers directly. Even then, there are limits to what they can do. All software updates that Toyota publishes are installed into the Tester and then the tester interfaces with the vehicle to perform the update. It isn't all that different from flashing a modem with new software, however if done improperly, the results are just as disasterous and a whole lot more expensive. Would you be willing to share your intentions? __________________ It has been said: Hybrid drivers come in 3 flavors, greenie, techie and cheapie. Pick any 2. 2005 Prius, Millenium Silver over gray, package 5 (AI)

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02-12-2006, 02:54 PM	#1
fredmertz Join Date: Feb 2006 Posts: 77 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Has anyone here used a hand-held tester to change the Prius electronic system settings? If so, which one has worked for you?