Give all credit to Ducati Boy's source here

http://www.avic411.com/forum/viewtopic.php?t=6331

***quick note***(You do not need to be moving to flip the switch, you can do it while stopped/parked)

Lemme run this down for you guys.

First you will need a toggle switch(any from radioshack will do)

-Take the light green wire from the radio harness and connect it onto one side of the switch

-Take a wire and connect it to the other side of the switch and the end of that wire into ground

-Turn car on, go into NAV, Settings, Hardware, Installation Status.

Flip the switch til you see ON for Parking Brake.

-When ON use a small tool to press the RESET button around the V button.

-The unit will reboot(EQ settings will be gone and NAV will be uncalibrated).

-Insert a DVD and start playing it. Give it about 30 seconds of playing.

-Now turn off the car and flip your switch

-Wait a couple of seconds now turn your car back on. The radio should no longer display the parking brake error message.

BUT WAIT...theres audio playing from your DVD but no VIDEO...

Flip your switch and voila!

If the above happened, you just bypassed your Z2.

Start driving, DVD still plays above 5 MPH and all NAV functions work!!!

-Very Important Note-Make sure when you turn off your car that you flip your switch to the off position and when you turn on your car flip it to the on position.--Hopefully someone can make a pac switch or something for this.

-Also, if you notice, your NAV wont work for about 5 mins. But will then recalibrate itself.

THANK YOU to whoever discovered this and I am in no way taking credit, just wanted to pass on my instructions and hope you all enjoy your new bypassed Z2's!!!!

It's not a bypass. As Ducati said it's more of a back door. A true bypass wouldn't require constant resetting of the unit.

I don't think this needs constant resetting, or maybe I don't get this hack. I don't have a Z2 to test with, but I thought that you only needed to reset to make sure there wasn't a parking brake error.

The way I see it thought. The sensors will recalibrate eventually and you'll have to reset the thing again. But I guess that's out of our hands since neither or us have a z2 to try it on.

I would have thought so too... but maybe we need more testing. Maybe the "back door" or bypass is that you have to wait 20 seconds after starting the car before you flip on the parking brake, and then it's unlocked till you turn it off. They have used a wait time then check for action bypass before, maybe this is just a different one.... maybe.

luckily i had to drive from chicago to wisconsin yesterday and everything works fine!

you do not need to reset and my status is on hybrid right now

GPS is working fine

this is truly a backdoor bypass

So do you need to start moving before you trip it or can you flip the switch after 15 or 20 seconds or whatever?

ive been flipping the switch as soon as I turn on the car and it works fine

From what Ive seen you do not need to be moving.

I did pass this info on to Ducatiboy and I thank him for crediting me in the prior topic. A few words about this "backdoor."

1) I agree that you don't have to be moving before switching the e-brake but you do need to wait until the unit has fully booted and some source is available.

2) I believe as another member previously mentioned in a different topic that this unit isn't different than the overseas (European, Asian) in regards to hardware but I could be proven wrong.

3) I think this bypass is only half the full thing. The other half of the bypass I feel from what we have learned from harddrive swapping, etc. is based in the software/flashmem.

4) The software difference is that foreign markets just need to see the e-brake on fully at all times, the US version detects if the e-brake is on and the vehicle is moving (by VSS, GPS, int. gyros) during boot-up. If you WAIT to flip the switch until after boot-up you are fine.

5) With #4 being TRUE and PROVEN this should eliminate the need to try and add resistors or mess with any other electrical wiring unless I'm missing the boat here. i.e., don't buy any ebay crap as it 99% won't work (unless it's a software patch

6) Nissan07 and I should be near the same point in callibration I assume. I think everyone will want to know if the backdoor is still open once the int. gyros are callibrated. My unit will not 3D callibrate I think b/c the VSS is disconnected. I'm not sure about that, I don't understand why there would be a connection between the two.

7) Please, no one be critical of me. These are just my thoughts, testing, and observations thus far. I didn't post originally as fear that being a newbee people wouldn't believe or accept my post. However, now that it can be reproduced by others, I feel more confident that this knowledge can lead us to the final bypass we would all like to see.

Thanks.

Beachdoc

"You will always find what you seek in the last place you look."

being a newbie does get you looked at and often times publicly noted, if the information pans out and works as it seems then the record is set straight. So, as the testing goes on, its good to see that the masses are actually trying to figure things out, and not being spoon fed.

just tried it in my truck...no luck...my vss is connected, Im assuming that neither of yours is

It did take a bit longer for the warning message to appear..25mph vs 5

Yes, please disconnect the VSS, and reset the unit as previously described. It should work.

Thanks.

Beachdoc

mine is now fully calibrated and still working.

Nissan07,

When you say fully callibrated can you elaborate? Full distance, right turns, left turns, and 3D? Mine doesn't seem to callibrate the 3D or at least not as yet, maybe that's the last thing to callibrate on the unit. What exactly does the info screen on your's say?

If this is true, the int. gyros are not going to affect this bypass, and a simple timing switch on the e-brake may be the final solution vs. attempting to modify the HDD/OS, etc.

Thanks.

Beachdoc

Nissan07,

You also mentioned that your status on the info screen said "Learning....Simple Hybrid" as well. Do you have a Hybrid vehicle or I wonder what is meant by the word Hybrid on the unit. I would hate to think this bypass only works on hybrid vehicles. That would add a whole new dimension to this bypass as our engines don't "kick-on" until after we're moving above 5mph. However, I turn my switch on with the engine running so I doubt that's it. Hopefully, it's not some weird electrical solution we have with hybrids.

Beachdoc

It will not learn 3D calibration without the VSS connected. Not a big deal unless you are in an area without satellite reception (bridge, downtown area with tall buildings, etc.)

Nissan07,

 

When you say fully callibrated can you elaborate? Full distance, right turns, left turns, and 3D? Mine doesn't seem to callibrate the 3D or at least not as yet, maybe that's the last thing to callibrate on the unit. What exactly does the info screen on your's say?

 

If this is true, the int. gyros are not going to affect this bypass, and a simple timing switch on the e-brake may be the final solution vs. attempting to modify the HDD/OS, etc.

 

Thanks.

 

Beachdoc

Hybrid is just terminology that Pioneer uses. Has nothing to do with hybrid vehicles

Nissan07,

 

You also mentioned that your status on the info screen said "Learning....Simple Hybrid" as well. Do you have a Hybrid vehicle or I wonder what is meant by the word Hybrid on the unit. I would hate to think this bypass only works on hybrid vehicles. That would add a whole new dimension to this bypass as our engines don't "kick-on" until after we're moving above 5mph. However, I turn my switch on with the engine running so I doubt that's it. Hopefully, it's not some weird electrical solution we have with hybrids.

 

Beachdoc

Yes, please disconnect the VSS, and reset the unit as previously described. It should work.

 

Thanks.

 

Beachdoc

think ill put a dpdt switch in for both the vss and the parking brake lead...so that when one is off the other is on

seems like it will give the best of both worlds

Except that if the VSS is ever hooked up it might give you a problem when you switch it out, either it won't work again for a long while till it re-calibrates, or when you switch the VSS wire back it, the combination of it in and disconnected will mess up how it works when it is connected or it might even screw with this "bypass" when you switch it in and out. Just something to keep in mind. If the bypass is important to you and it works better with it disconnected, it might be better leaving it permanently disconnected.

I agree with Ducatiboy. Leave the VSS completely disconnected. Just put a toggle on the e-brake. If you get everything working fine ( several people are having a hard time reproducing this as is....) and it callibrates, then you could try the switch on the e-brake first which might be an option for a perm solution. I think messing with the VSS on a timing switch will just cause you problems and confuse the unit. Just my thoughts.

Beachdoc

In my mind, this is still not a full bypass if it requires the absence of the VSS wire. The goal is normal function of the GPS and all the features that get locked to be available while moving. The true answer is still eluding us, but if you guys are happy with what you've got, have at it. At least people are trying!

ok i did it and if you disconnect the vss wire your vehicle dynamics go away and also once my z2 calibrated about 10 miles it shut the movie off and then told me the whole warning while driving crap we all hate but he is truely on to something now we just need to perfect it

Titos,

Keep driving and using the bypass. The int. gyros are not fully callibrated. My vehicle dynamics screen works fine. Initially, it didn't, but sometime between the reset and 200 miles it started working perfectly.

Yes, I get the video warning screen too, but it disappears quickly. After you switch the e-brake on, the video should pop on. I think some people trying this method are a little "trigger happy" with the e-brake switch. Start the DVD without video, see the warning screen, press enter to restart the video where it previously left off, hear the sound, then flip the switch and the video will come on and stay on as long as the car is running. Just remember to flip the switch back off when you turn the car off.

Also, everyone should make sure they are using a 2 way switch not 3 way, and that it's properly grounded. This unit is very finicky when detecting the e-wire on boot.

I know this isn't the perfect solution, and I don't even use the mod everyday. But, it does come in handy on long trips or when you really don't know where you're going.

As previously mentioned, the e-brake check is probably embedded on the HDD or in flash memory. That may be hard to change without insider info.

Beachdoc

Also, everyone should make sure they are using a 2 way switch not 3 way, and that it's properly grounded. This unit is very finicky when detecting the e-wire on boot.

Beachdoc

I currently have the Avic Z2 harness e-brake wire connected to the vehicle's e-brake wire. Should I disconnect the Avic harness e brake wire and connect it to one side of the toggle switch and the other to ground?

The toggle switch is a SPST switch, right?

Yep...that's what works for me.

All of the functions including speedometer work for me. In fact, my Pioneer dynamics screen is more accurate than my speedometer. All with the VSS disconnected. I think Nissan got the same thing.

Perhaps there is a difference between starting to use the mod switch before and after the GPS callibrates. That would be my only guess as to why people are getting variable results.

Beachdoc

"Hey, I just fool around with this stuff, I didn't design it."