On my new RX the location symbol appears to stall and after a second or so jumps ahead to the correct location. I have a LS and it works smoothly.
Going to dealer, but it looks to me like the speedo cable input is failing and the GPS fix corrects the location.
Anyone having a similar problem and fix?

 

I do see this from time to time on our Nav screen ('10 RX). I don't see why the spedometer cable would affect this as it is based on GPS. The only thing I can come up with is CPU stall. I haven't checked but I am curious to see if having multiple items like iPod, XM, Bluetooth phone, etc. slows the CPU down.

 

Perhaps one of our resident engineers will answer with more authority, but I wouldn't think the speedometer would have anything to do with "Nav Sys jump" or even all the different audio sources wouldn't slow down the CPU. I would think it would be more a matter your GPS receiver isn't seeing all of the needed satellites.
Engineers???

 

In some car nav systems (don't know about the RX), when the system loses satellite data the software uses car speed to 'dead reckon' the location on the map.

So in these cases the speedo info is used by the nav system.

 

At the dealer, I was told that since the nav is DVD based it will not be as smooth as the LS system using a hard disc drive. A tech checked the system and said it was working and no repairs were necessary

 

Do you have the correct size tires for your car? We had a customer that had the same issue on his LS and that was his problem. They were shorter than normal and throwing the speed sensors off.

 

If the nav is consistently jumping, this would imply to me at least, that the problem is not the speedo information. Rather something else is failing and falling back on speedo information.

We haven't heard how 'big" the jump is. Although I'm not sure quantity of jump would help indicate the problem. Is the jump equal to the "normal" error of a GPS or is the jump a mile or two?

 

the 3gen RX is NOT DVD based. Either you have a 2gen RX, or your dealership is incompetent.