Navigation system jumping

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Jun 13, 2011 | 08:27 AM

marco5570

Thread Starter

Driver School Candidate

Joined: Apr 2011

Posts: 4

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From: FL

Navigation system jumping

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?

Jun 13, 2011 | 10:35 AM

k9shelly1

Driver

Joined: Aug 2010

Posts: 195

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From: TX

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.

Jun 13, 2011 | 05:40 PM

DunWkg

Racer

Joined: Nov 2009

Posts: 1,626

Likes: 27

From: Iowa

Quote:

Originally Posted by k9shelly1

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???

Jun 14, 2011 | 05:34 AM

RA122022

Driver School Candidate

Joined: Aug 2009

Posts: 25

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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.

Jun 16, 2011 | 06:19 AM

marco5570

Thread Starter

Driver School Candidate

Joined: Apr 2011

Posts: 4

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From: FL

Just to complete the post

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

Jun 16, 2011 | 06:30 AM

The X Men

Lexus Test Driver

Joined: Feb 2010

Posts: 1,315

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From: MA

No jumping on my Navi.

Last edited by The X Men; Jun 16, 2011 at 12:52 PM.

Jun 16, 2011 | 06:47 AM

offroad200

Instructor

Joined: Jul 2010

Posts: 905

Likes: 176

From: SC

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.