If it was a show car, all you had to do was ground the parking brake wire. I doubt he's gonna be driving around while he's showing it off. Like someone else said, this type of bypass is just not practical. If he wanted video while he drives, you would have been better off just looping the video output into the rearview camera input. Now he's gonna have to get a new GPS antenna when the real bypass is figured out...unless he wants to risk getting a weak signal. Just my two cents.

he has the backup camera and the company i work for is big so switching the ant. out is not a problem. As far as the signal loss, i think some one on a different forum tested it and said that it was slight.

In the mean time whilst we patiently wait for the super geneouses to figure this one out, how do u use the reverse camera by-pass to watch dvd video?

what are the advantages of hooking up the VSS wire? im not sure there really are any.

I know the advantages of the parking break. could any tell me if there is any fr the VSS cable?

Thanks

It allows it to use dead reckoning....so it is much more accurate with it hooked up...i can drive around in an underground parking garage and it still knows where I am based on the Gyros and the VSS

what are the advantages of hooking up the VSS wire? im not sure there really are any.

Try driving into a long tunnel during rush hour traffic. I was driving through the Holland tunnel, using a tom tom, and got slowed down/stopped inside the tunnel. The Tom Tom didn't know I had stopped and thought I was stll doing 40 or so. So the indicator made it into Manhattan way before I did (I think I was still on the Jersey side). I would assume that the AVIC would have still known exactly where I was).

what are the advantages of hooking up the VSS wire? im not sure there really are any.

Try driving into a long tunnel during rush hour traffic. I was driving through the Holland tunnel, using a tom tom, and got slowed down/stopped inside the tunnel. The Tom Tom didn't know I had stopped and thought I was stll doing 40 or so. So the indicator made it into Manhattan way before I did (I think I was still on the Jersey side). I would assume that the AVIC would have still known exactly where I was).

That really depends. The other side of the coin is that inertial sensors like gyroscopes drift over time. The inertial sensors in one of these units are going to be fairly cheap - a really good gyro costs upwards of $70k. So, what happens is the GPS portion is constantly calibrating the gyro, and correcting for its drift. The VSS measurement doesn't drift. In these circumstances, I would expect the AVIC would understand that the car slowed down. However, depending on how -long- you spent in the tunnel, it may have had the car start drifting to the right or to the left of your actual location.

One neat thing about having inertial sensor, and the VSS, and the parking brake is that they will make the GPS portion more accurate. To do a 3D fix, the GPS unit needs four satellites to calculate X, Y, Z, and Time. It is four equations and four unknowns. What typically happens is that the receiver can pick up 8 to 10 satellites. Doing this gives 8 to 10 equations and four unknowns by means of a least square fit. Doing this gives more accuracy to the solution because more information is fed to the problem. The same thing goes with inertial sensors. You might have 8 to 10 satellites plus two or three gyros plus a speed sensor. That could yield fourteen equations and four unknowns, yielding a solution with less noise and more accuracy.

What your Tom Tom receiver did was assume the same vector as it tried to re-aquire the satellites. It kept you going at the last known speed and direction. It probably should have stopped reporting an updated location after just a couple of seconds. It is hard to guess what the user wants to do in those situations.

i never hook up the vss wire on pioneer units. It is very accurate with all 8 satellites. And the vehicle dynamics is dead accurate on the speed of the car without the vss. Just a preference for me.

Just laziness for me

We operate a shop/distributor in Florida and would like to make an offer to anyone whose been waiting on the AVIC-Z2 unit to come out in order to test it.

Any hackers/moders wishing to purchase an AVIC-Z2 unit we will give to them at 1650.00 shipped. We've tried and tried to bypass these units in our retail store with no luck so we're reaching out to the community and selling these units at our cost.

WE ARE AUTHORIZED PIONEER DEALERS so the unit will come with a full warranty (providing of course you dont void it).

I'm not sure if the moderators will allow this post, but if they do its an excellent deal for anyone whose been wishing to upgrade to a Z-2 and start playing with the bypass features.

Also, you CANNOT simply copy the harddrive from the Z2 to the Z1. They have a security feature built into it that require a check back pin number of some sort. This came directly from a personal friend of ours in Pioneers Technical Support, however even he wasn't aware of a BYPASS to date.

Contact us in PM if you wish to take this offer. We aren't trying to make money or sell merchandise here. We're trying to offer people a cheap deal and hopefully get this darn bypass licked completely!

so, once again with my original question. In the mean time whilst we patiently wait for the super geneouses to figure this one out, how do u use the reverse camera by-pass to watch dvd video? Thanks everyone for the info. Its been really helpfull!

All you have to do is put a switch on the Reverse wire of the unit itself so that you can manually flip a switch to turn reverse camera on and off.

Then using an RCA cable use your VIDEO out on the Z2 unit and loop it back into your REAR CAMERA INPUT wire.

This will give you a video bypass while having a notice across the screen saying its the camera an objects may appear reversed, ETC.

I am beginning to think this thing can't be bypassed

Any thoughts

There certainly is a bypass. It's just a matter of time. Pioneer would significantly lose market share if there wasn't a method of 'testing' or installing on RV/MOTORHOMES. This we HAVE been assured of through our sales channels.

Why would you think that? EVERY Pioneer nav ever has been bypassable. The N2 took months and months before it leaked. Be patient, don't spread the "unbypassable" word for no reason

I am beginning to think this thing can't be bypassed

sorry just frustrated hopefully ducatiboy will figure this thing out and save the day.

according to this ebay auction the avic-z2 bypass has been figured out!?

http://cgi.ebay.com/AVIC-Z2-Video-Lockout-Bypass_W0QQitemZ150111201309QQihZ005QQcategoryZ47103QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

anyone know if this is true?

sorry just frustrated hopefully ducatiboy will figure this thing out and save the day.

Sorry, but I have been so busy and I don't have a Z2 so I have not even spent any time on it. I've just been giving people ideas to try.

according to this ebay auction the avic-z2 bypass has been figured out!?

 

http://cgi.ebay.com/AVIC-Z2-Video-Lockout-...

 

anyone know if this is true?

Most likely it's just a switch to disconnect the nav antenna and VSS wire and ground the parking brake. Anything else, I would believe it when I see it.

according to this ebay auction the avic-z2 bypass has been figured out!?

 

http://cgi.ebay.com/AVIC-Z2-Video-Lockout-...

 

anyone know if this is true?

Most likely it's just a switch to disconnect the nav antenna and VSS wire and ground the parking brake. Anything else, I would believe it when I see it.

Out of curiousity I emailed the guy and asked if the bypass did just that. I'm awaiting his response but will let you guys know.

It is always possible, but not probable that the Z2 is using velocity based GPS calculations and blocking based on that. You can calculate a position based on psuedo range measurements, and you can also calculate a velocity vector based on pseudo range differences using the exact same code path (least squares, or weighted least squares, a Kalman Filter solution would probably be different). A Stand-alone GPS unit can't tell when you are at a dead stop, but it can certainly put in a theshold of 10mph or something. Let's hope that isn't the case, as you won't be able to hack it via a pull-up resistor or something.

Here is something you can try without using a multimeter or an oscilloscope.

Is the AVIC-Z2 blocked when you release the parking brake and the foot brake, but have the car in neutral with the engine off? What if the parking brake, foot brake are off, the car is in neutral, and the engine is on? I'm not remembering here if there was an ignition sensor with the brake sensor or not - can someone clarify that?

Is it blocked when you are crawling down the road at 2mph (as slow as possible), or something similar? If you can do that, then I would guess it is based on the GPS Velocity vector, and not the VSS or brake signals.

Does it work when you are driving slowly, but with a coffee can or something metal covering the antenna?

I don't have one of these yet, I am waiting to get a double-DIN face plate for my '06 Volvo V70. I am trying to decide if I should go with a Z1, or a Z2 right now, and thus, can't tinker around.

It locks you out of certain functions unless the parking brake is on. That's

the first step in accessing the features that are not supposed to be accessed while in motion.

As soon as you disengage the parking brake (moving or not) those get locked out again.

If you have the parking brake slightly on (so the Avic thinks it's on but not

so much it's stopping the vehicle from moving or the wire just grounded)

and then move, it can sense the motion and lock you out anyway.

It seems to take

1. The GPS signal into account (15 mph or more)

2. The VSS wire (if the GPS wire is not getting a good signal, 15 mph or more)

3. The internal gyros to sense any motion (if the first 2 are not connected)

If any of those sense motion, it will lock you out and then say your parking

brake is not connected properly.

Let me get this straight. If you are -not- moving, it locks you out when you disengage the parking brake? You can fake the unit in thinking the parking brake is engaged though.

If the parking brake is engaged (real or fake), it will lock you out if you are going more than 15mph? The gyro is probably only reporting directions.

If you are less than 15mph and take a right hand turn, does it cut off? That might tell you if it is blocking based on the gyro.

Does it do this stuff with either the GPS antenna disconnected, or if the GPS antenna is covered with something metal? This should be checked with -and- without the vss signal connected.

It would be interesting to know if it is looking at the vss signal, or the GPS signal, or both. Doing those tests should make that clear.

This could turn out to be difficult to hack.

hey every1 im new to the site and to a z2.. its getting installed as we read this..

From reading all the post there isnt any hack for the z2.. makes me wanna jus change my mind and get the z1. .But im sure something will come threw...

Jus a question for ducatiboy = would u b willing to try ur bypass ideas on my z2 if i come by ur neck of the woods?

Jus a question for ducatiboy = would u b willing to try ur bypass ideas on my z2 if i come by ur neck of the woods?

I have had a couple offers but I think I would need a couple weeks with it, with the amount of free time I had lately. So I would most likely need my own. But thanks for the offer.