I have a Z1 that has been navigating fine for a year. I ordered a replacement hard disk on eBay, plugged it in, and reset my position so it wasn't in California any more. That was easy.

Ever since the upgrade, the Z1 has been getting lost. Drive around the block, and it thinks you're in the woods. Exit the freeway for gas and get back on, and it thinks you're parallelling the freeway, driving through lakes and small towns. "Turn right! Make a U turn!" It tries to get you back over to where it thinks the freeway is.

Has anybody else had the same trouble? The hardware hasn't changed, and the antenna is right where it's always been. It looks like an issue with the new software.

That's because you have to reset all your 3d calibration settings after installing it.

Thanks for the tip. The manual says nothing about resetting the 3D calibration, but there are only three buttons, so what the hey - I reset them all.

After driving for about 45 minutes, stopping for a while, and driving 20 more, the map still shows me parked in my driveway. The learning status is still calibrating, as it has been since the reset.

I've killed it. Now what?

Then perhaps it was only using 3d sensors after the upgrade, and with them reset, now there's nothing to go on. Obviously the GPS antenna should be sufficient alone.

Check your GPS connection in hardware settings. My guess is it's NOK / disconnected. Check the connection as well. Once it's getting signal, it should relearn 3D calib.

The connection screen shows the GPS antenna is connected.

I called Pioneer, and they advised a hard reset (Hold the Map button while booting). That will force me to reconfigure everything - camera, screen, Bluetooth, etc., but should make the thing able to navigate again. I'll report back on how it goes.

Did the reset fix your problem?

When I first moved to Denver my Z-1 got lost but after that it's been pretty reliable.