I have noticed after recently having my z1 installed that on the vehicle dynamics, when I am going fast (70+), the speedo and acceleration start to screw up. They don't reflect my speed and they freeze up and stop adjusting the information. When I am going slow (city driving), it works just fine. Has anyone seen this problem or know what might be causeing it? It's installed on a 2005 Jeep GC.
Thanks.
do you have the vss hooked up? If not, maybe the unit screws up using only the estimates based on moving coordinates?
Where in the country is it legal to go over 70? 
LOL j/k
Where in the country is it legal to go over 70?
Apparently in some parts of Texas:
Yes, the VSS is hooked up and it was installed professionally. I took it back to them today and had them look at it and the guy said it was pulsing correctly.
Any other ideas?
Oh, and umm... I'm driving this at over 70mph on a closed track..... yeah.... that's it...... 
So, after driving around some more today, it actually starts messing up above about 35 mph. The speed is off by between 3-15 mph and it is really slow to update the speed. Below 35 mph, it works as it should. I reset the hybrid 3D info and pulse info and it is still doing the same thing. Any ideas anyone?
Thanks.
well, pioneer will tell you that the vehicle dynamics arent perfect. your cars speedometer will likely be the best for accuracy when compared to the z1.
I'm not so much concerned that the speedo is off and not updating as quickly as it should as I am about if affecting the navigation.
My location doesn't seem to be accurate either. When I stop at a stop sign, it shows me about 15 -20 feet away from the stop sign still. This is a problem because when the hot navi check tells me to turn, I have already turned.
????
I'm about to throw this thing in the trash I'm getting so frustrated with it.
sounds like you have a problem more related to the navi itself and not the vss connection. Maybe servicing it will help
I'm not so much concerned that the speedo is off and not updating as quickly as it should as I am about if affecting the navigation.
My location doesn't seem to be accurate either. When I stop at a stop sign, it shows me about 15 -20 feet away from the stop sign still. This is a problem because when the hot navi check tells me to turn, I have already turned.
????
I'm about to throw this thing in the trash I'm getting so frustrated with it.
I just installed mine in an 07 Jeep and noticed the same problem. I am standing at a intersection waiting for the light to turn and I am at least 50 ft off. Today, I also had my PDA with iGuidance running and that one had me right on the intersection.
Something is off with nav system.
At least I'm not the only one having this issue, then again, sorry that you are having this issue. What kind of Jeep do you have?
Look to the left of this text 
07 Unlimited X 4x4
you know what... maybe vss is tripping out the avic, try disconnecting the vss.. see how your positioning is.. it should only be about 3 ft off without the vss connected. Speed and such with the vehicle dynamics wont work but see if the navi is better, if so, then it is probably the vss connection, maybe a different vss connection is needed
you know what... maybe vss is tripping out the avic, try disconnecting the vss.. see how your positioning is.. it should only be about 3 ft off without the vss connected. Speed and such with the vehicle dynamics wont work but see if the navi is better, if so, then it is probably the vss connection, maybe a different vss connection is needed
Well, today I tried it, I cut the VSS wire and just in case, I put quick connectors on.
I started driving, the map moved, but no cursor. 
I stopped, reconnected the wire and all is well again. Go figure.
Well, today I tried it, I cut the VSS wire and just in case, I put quick connectors on.
I started driving, the map moved, but no cursor.
I stopped, reconnected the wire and all is well again. Go figure.
Hmm... very interesting....
Does your speedo work properly in the vehicle dynamics mode? I noticed that it also shows the same speed indicator under the Hardware Information where it shows the 3D info.
Due to problems like these, Pioneer should really provide the Z2 upgrade for free to registered owners, or at least a sustantial discount.
Pioneer, you listening! 
naa, not really. You cant expect the aftermarket unit to be compatible with all vehicles, It goes to reason that it has an input or signal sense wire and then translates that into something visual in regards to say speed. There are many manufacturers and different 'ways' of making that signal sense wire do its thing... you would have to establish a standard for all vehicles then you could blame pioneer.
Hmm... very interesting....
Does your speedo work properly in the vehicle dynamics mode? I noticed that it also shows the same speed indicator under the Hardware Information where it shows the 3D info.
I am still trying to get to know this unit and what do you mean by "vehicle dynamics mode? ... 3D info?"
All I know is that in the Hardware section I do get a "Pulse" display, where do I see the rest?
I am still trying to get to know this unit and what do you mean by "vehicle dynamics mode? ... 3D info?"
All I know is that in the Hardware section I do get a "Pulse" display, where do I see the rest?
If you go into map mode and hit the map button, one of your options should be Vehicle Dynamics. Press that to view your speedo. Is your speedo accurate at speeds above 40mph?
If you go into the hardware area you should see the number of pulses increasing as you drive. Is that number increasing? Above that, you should see a little picture of a car and a slope indicator. It should also show the current speed there. Is that accurate? That will be the same that the speedo shows under vehicle dynamics.
Thanks, I will get back on this later.
Alright, I found it all and I am happy to say the pulse and pulse bar go up and down in relation to the speed
The dynamics panel seem to work properly also, I was only able to go 45 in a 25 mph zone 
only long enough to compare speeds.
The numbers are dead on.