Firmware updates require new download every time?

hdrygas · 03-21-2006, 09:55 PM

Quote:

Originally posted by galaxee@Mar 21 2006, 05:17 PM
yes. that's it. insanely slow thht

[snapback]228154[/snapback]

Ifixem said that he was getting a new "scanner" next year much faster. He wishes he had a CAN-View!

hobbit · 03-21-2006, 10:15 PM

Does the reflash clear the learned fuel maps or other parameters?
If so, the car might drive a little funny until it re-adapts to
your style and random variances in the sensors.
.
I'm very glad to hear they're going to rework TIS. Hopefully they
won't make it worse than it is now. Someone over at Snap-On needs
to learn that all the world is not internet exploder.
.
_H*

Jaymanva · 03-22-2006, 08:10 PM

The THHT only holds 2 software updates. The engine ECU update is the same for '04 and '05 but the HV ECU update is year specific. So if the last one that was done was an '05 and yours is an '04 they would have to download the '04 version into the THHT before starting the update on your Prius. Toyota also has other flash updates on other vehicles that my have been on the THHT and that would require downloading both the engine and HV updates before starting yours. Another possibility is that the tech had to wait for another tech to finish before starting your update.

JaymanVA

**efusco** · 03-22-2006, 10:58 PM

Quote:

Originally posted by Jaymanva@Mar 22 2006, 07:10 PM
The THHT only holds 2 software updates. The engine ECU update is the same for '04 and '05 but the HV ECU update is year specific. So if the last one that was done was an '05 and yours is an '04 they would have to download the '04 version into the THHT before starting the update on your Prius. Toyota also has other flash updates on other vehicles that my have been on the THHT and that would require downloading both the engine and HV updates before starting yours. Another possibility is that the tech had to wait for another tech to finish before starting your update.

JaymanVA

[snapback]228749[/snapback]

Ok, and I bet they do the download for every car just to make sure they don't accidently install the wrong info. Thanks for that clarification.

KTPhil · 03-22-2006, 11:45 PM

"Does the reflash clear the learned fuel maps or other parameters?"

Yup, I've read it does. It has taken 4-5 tanks for my mileage to return to its former value, but it has now recovered.

03-22-2006, 08:10 PM	#13
Jaymanva Join Date: Feb 2006 Location: Northern Virginia Posts: 7 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	The THHT only holds 2 software updates. The engine ECU update is the same for '04 and '05 but the HV ECU update is year specific. So if the last one that was done was an '05 and yours is an '04 they would have to download the '04 version into the THHT before starting the update on your Prius. Toyota also has other flash updates on other vehicles that my have been on the THHT and that would require downloading both the engine and HV updates before starting yours. Another possibility is that the tech had to wait for another tech to finish before starting your update. JaymanVA __________________ 2006 Super White #7 Factory Interactive XM Tuner GT Seat Covers

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03-21-2006, 10:15 PM	#12
hobbit Senior Member Join Date: Mar 2005 Location: Bahstahn Posts: 3,626 My Car: Model: Package: Thanks: 0 Thanked 216 Times in 118 Posts Friends: 0	Does the reflash clear the learned fuel maps or other parameters? If so, the car might drive a little funny until it re-adapts to your style and random variances in the sensors. . I'm very glad to hear they're going to rework TIS. Hopefully they won't make it worse than it is now. Someone over at Snap-On needs to learn that all the world is not internet exploder. . _H*

03-22-2006, 11:45 PM	#15
KTPhil Senior Member Join Date: Jan 2005 Posts: 1,313 My Car: Model: Package: Thanks: 0 Thanked 2 Times in 2 Posts Friends: 0	"Does the reflash clear the learned fuel maps or other parameters?" Yup, I've read it does. It has taken 4-5 tanks for my mileage to return to its former value, but it has now recovered.