Speed Sensor Defeat Update

If anyone wants to build these, I'm sure we could set up a group buy. I would be first for sure!!!!:bounce:

 

Has there been any effort at defeating the BT/nav lockouts by patching the software?

 

I have been trying to decide on the best way to do this mod with the functionality I want. I'd like to condense it to one switch which will be installed next to my interior lighting dimmer. The functions I'd want would be to have both the NAV and BT circuits broken, the NAV on and BT off, and both on. I'm not too familiar with wiring, but I'm curious if a DPDT w/ center off (On-Off-On) would work. Basically, the bottom position would be NAV on/BT off, the center would be both off, and the top would be both on. Any takes on if this is possible?

 

Is it me, or are many of the links posted here (namely http://www.priuschat.com/forums/viewtopic....p?p=24399#24399) dead?

 

Thought thats how everyone does it...you get the newer nav disc and inject it with the older patched firmware...I cant confirm because my Prii doesnt have nav but i see the discs out there

 

Just how would one 'inject' the older firmware? I'd like to do this rather than the switch option.

Thanks

 

Taken from a Tundra Forum:

Ok Guys, I heard it was impossible, but with enough research i was able to figure it out. I have been looking for a way to unlock the Navigation while driving without have cut wires or do anything too major. Well here it is, It took me a few tries, but I now can drive and have my wife enter a destination or do anything else that is locked normally when in motion.

Ok In short here is the process that I used. It is hybrid of a few others i have read.

You will need a dual layer DVD +R (I used Memorex) and DVD burner that can burn Dual Layer disks.

1. Get v6.1 NavDVD's out and make sure they are clean. If not, wash them with warm soap and water and use a soft towel to DAB the extra water away.

2. Make a folder on your computer called "v6.1" and copy the contents of the v6.1 DVD to that folder.

3. Download v5.1 loading.kwi and replace the one that is in v6.1 folder with this one. You can get the file here Override for Navi - v5.1 LOADING.KWI File [archive]


4. Download and install ImgBurn,( The Official ImgBurn Website )set mode to "Build" Select source and point it to the backup directory of the NAV disc that is on your hard disk (refer to steps 1-3). Tell it YES that it is the root directory for the image content.,
Verify that file system under the options tab is ISO9660 + UDF, and recurse subdirs.

Add the UDF label to name the disc under the lables tab.

Press button to "build" ISO image. Give it a name.

Use NERO or other software to burn image on to DVD+R DL disk with book type of DVD-ROM. Book type for nero can be set under "Choose Recorder", Options, Book type settings.

Test disc in NAV system without pulling power yet. The NAV system will be able to read all the data on disc and give you POI's and new locations. The updated disc is now readable.

5. Next you pull fuse or neg battery cable for the 5 min. Then re-attach. Nav should pull new firmware and boot.

Turn on the car, and perform the following on your Naviagtion.
6. Press Menu
(menu screen appears)

Press Volume
(volume screen appears)

Press upper left corner
Press lower left corner
Press upper left corner
Press lower left corner

(Service Menu will appear)

Press and hold Over Ride for a few seconds


NOTE: If you are unable to get the SERVICE MENU up w/ the above procedure, this means you are still running v06.1 firmware ... please disconnect your NEGATIVE BATTERY TERMINAL & let the car sit for about 5 minutes ... then reconnect. This will clear out the NAVI's memory & when it comes back on, it will have to reload the firmware from your newly burned DVD, then the procedure should work!!

The above process worked for me. I got most of my information from the below link. Good Luck

 

AWESOME
thank you for the good info!!!!

So, this was successful on your 2008? You have the new v7 software (like me)?

 

I dont have nav, Ive just helped others do it....

 

I live in a Mac world and wouldn't be able to recreate the DVD you laid out in your post. Is there any way you can make copies of the combined firmware, ect., and sell them? Or is this against rules that I am not aware of...
I'm sure there are many of us out there that would cherish a copy!!

 

No, you're not dead. It is the links...

 

Like this one? (I used it for automatic headlights)

 

Alright.....

I have the circuit diagrams, and can get the parts but have one question: On the upper right side of both diagrams, there are two logic devices (BT only diagram shows two NAND gates while the BT-NAV combo shows one AND gate and one OP-Amp (I think)). What do those do and where do they go?

If i'm missing something, feel free to poke fun at me because I am an EET major and have looked at this with two other engineers. Kind of embarrassing.

 

Those are just unused NAND gates and comparators. The inputs should be tied to something to avoid surprises, but the outputs don't go anywhere nor do anything.

 

Thanks to all especially Mike and Evan for you assistance! I ordered parts last night and will post pictures / results when I get the device built.

I can already imagine having the nice green keypad while driving up I-294!

 

Do you think that using this technique to lay the old US firmware onto a UK map DVD will allow me to run the override key sequence on my UK Prius?

 

So here's the prototype. Not very pretty on a breadboard though. It's past my bedtime and I don't want to go to sleep sad so I will be testing tomorrow / this weekend. If all works, I should have finished pics coming soon! I opted for the phone only version since I don't mind the NAV maintenance mode thing on my '05.

 

Hi Brian,
Just noticed that the BT only schematic doesn't mention how to set the 2 variable resistors. Hopefully you noticed the equivalent on the dual-auto-defeat schematic. But in case not, here's what you need:
1.20V on pin 6 of U3B
2.27V on pin 3 of U3A
First adjust the lower 47KOhm variable resistor until you achieve the 1.20V value Then adjust the upper 47KOhm variabl resistor to get the 2.27V. Then double check that both voltages are still OK and retune if needed.