Quote:
Originally Posted by louis
Does anyone know if the roof antenna is the sat antenna or just terrestrial? I went from a pioneer nav in my tC and that thing would lock almost instantly... it would also keep navigation going (using what I believe is called dead reckoning) under the tunnels of Boston.
The subaru nav sucks. I sat in my driveway for 3 minutes this morning. It gets a signal, then as soon as a I make a 90 degree turn onto the highway, it's lost for the duration of my 25 minute drive. WTF.
I absolutely love this car. But the nav is awful. When it gets a signal, it works well, but I just don't know why it would take more than 30 seconds.
Anxious to see Crutchfield's writeup of the internal wiring and such.. may just drop one of the pioneer units in there but I don't want to have to re-install phone mic/usb/aux ports and sat. antenna.
-- oh, forgot to add... the nav traffic also does not work. It will say no issues, yet there will be stopped traffic/construction.. you name it. I've used a late model garmin with FM traffic and it actually does work.
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If you check the other thread I linked above I list where I have discovered a few things. First I think the roof antenna is just for the radio: XM and FM. I think the GPS antenna is in the same place as in the Impreza- behind the head unit just under the dash. The combination of this location in the BRZ and the performance of the antenna+receiver of the GPS seems fairly poor compared with all other GPS units I have used. More info on what is going on in the nav unit can be seen in the service menu. You can get into the service menu by pressing at the same time: first the map button, then the speech command button, then the audio button and holding them a few seconds. (You can go back to normal operation by pressing and holding the volume nob like you do to shut off the audio.) From there I see that the speedo input to the nav unit reads 64 MPH when the car is really going 41 MPH. I think this error is at least a problem for the dead-reckoning the unit does when it doesn't have a satellite fix. It might also interfere with getting a GPS lock when moving if the software tries to make the fit agree with the speedo value. The poor dead reckoning could also slow down the initial lock after driving by causing the unit to start its initial guess for your location in the wrong place.