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Navigation system not working properly

77095 Views 31 Replies 28 Participants Last post by  Joe Sienna
I have a 2007 Sienna.

A couple of days ago the Navigation system stopped working. It would come on for a little while . . .then stop working . .. then come on for a short while . . .then stop working again. It has been intermittent. My mechanic says there are no loose wiring connections and that it's the unit. I trust this guy but I went looking for other advice. It has been suggested that maybe it's the power supply.

Before I go and try to replace the unit, I'd like to make sure what the problem is. It's important not only for the GPS but it has the radio, CD and phone which I like.

Does anyone have a similar experience with the Navigation system cutting out intermittently? Any advice would be appreciated.


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I have a 2006 Sienna the navigation/stereo/backup camera sputtered out a lot like the ones described here and now does not work at all. The radio came on and off for a few minutes for a few days, though I could not control it. Now the button back lights on that unit (not the screen) come on and off. I took it in to Toyota today and they could not fix it, said I could get a refurbished one installed for $2900. Any ideas? The car has 106,000 miles.
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