2010 Prius Navigation System getting lost

garmin?

 

Under what conditions does it get lost? Wide open spaces, or are there obstructions to the GPS signals? Large buildings, mountains, trees, overpasses, tunnels.

 

garage?

 

I have a 2012 with navigation package, no satellite radio. This has also happened to me. The only way I've been able to remedy is to turn the car off and then back on. (I know it's not ideal when you trying to get somewhere.) To answer the other questions, this has always happened while I'm driving on regular, populated roads, not in my garage or a tunnel. For whatever reason, my GPS can't locate where I'm driving.

I know that's not a huge help, but just letting you know it has happened to someone else.

 

Could it be the GPS antennae ? It is located in the instrument panel according to the Nav manual.

Have you done any front window tinting? There is a caution in the Nav manual against window tinting since the metal in the tinting will interfere with the GPS signals.

 

My nav continues tracking in parking garages and tunnels (underground and mountain). The Garmin loses contact.

 

Have you tried cleaning the map DVD? I don't expect it to help but like chicken soup, it can't hurt.

If it is a weak connection somewhere why does rebooting the car restore functionality?

I'm sorry I don't have any other bright ideas. Troubleshooting an intermittent problem is a real PITA.

To be fair, the dealer & mechanic don't want to get involved because diagnostics don't pay and you aren't going to want to pay an hourly rate for someone to pull the car apart to find the problem.

 

Sorry to hear about your troubles. Not sure if I know of any solutions other than defaulting to a smartphone GPS app. I debated whether the factory navi was worth the extra $1500 between the II and the III. Then again, sometimes google maps also tends to go hay-wire...