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NAV Speed indicator

By vthee · May 18, 2014in NEX Series💬 23 posts👁️ 6,163 views
Posted May 18, 2014 · 04:55 UTC#1

My cars speedometer matches up with my NEX 8000 nav speed pretty much until it hits 70 mph... then after that my NAV speed occasionally moves up while i'm going much faster than 70mph.  Once i go down past 70 mph it tracks pretty much the same again.

 

Basically anything above 70-73 mph it doesnt accurately track my speed on the head unit.   Is this a bug or something? 

Posted May 19, 2014 · 18:39 UTC#2

the only time i have any trouble with mine is if i floor it if i have the speedo screen on and i floor the car it will jump 7 to 12 digits at a time. i think its more because the car is faster then the unit can handle...lol

Posted May 20, 2014 · 17:42 UTC#3

Do you have Vss connected ? That's one of the things it's usefull for. If you don't have Vss connected, speed and distance is calculated from the GPS positioning data, which is less accurate and takes time to process

Posted May 20, 2014 · 23:13 UTC#4

What is VSS? and is it part of the install?  If its part of the install i'm assuming it was installed... 

Posted May 21, 2014 · 09:38 UTC#5

VSS stands for VEHICLE SPEED SENSOR. Also known a a speed pulse. If your vehicle has a bad wire. You should connected to it for a more accurate reading. It's part of the pioneer harness. In most cars it's part of the OEM harness. In my vehicle it was part of just connect the wires to aftermarket harness to the radio.

Posted May 21, 2014 · 17:13 UTC#6

I don't speed sensor could be the problem since it tracks accurately up to 72-73.  I've the speed warning option set... perhaps it turns off when you go over the speed limit?  I'll look into it more.  I figure if it works accurately up to 72-72 there shouldn't be anything wrong.

 

thanks.

Posted May 21, 2014 · 19:36 UTC#7

My vehicle's stock radio (Rockford Fosgate) used the VSS wire to adjust the volume.  As the vehicle speed increased so did the volume.  If these NEX units had a similar feature it would be the icing on the cake.

Posted May 22, 2014 · 12:47 UTC#8

they do have that feature you can even adjust how loud it turns up with the speed...lol

Posted May 22, 2014 · 21:47 UTC#9

My vehicle's stock radio (Rockford Fosgate) used the VSS wire to adjust the volume.  As the vehicle speed increased so did the volume.  If these NEX units had a similar feature it would be the icing on the cake.

Yes the nex can do it, I believe it's called ASL, you can enable or disable the feature it's in the settings

Posted May 23, 2014 · 16:58 UTC#10

Confirming, and it works quite well.

Posted May 23, 2014 · 19:43 UTC#11

Yes the nex can do it, I believe it's called ASL, you can enable or disable the feature it's in the settings

 

Hmm...

 

I have the 4000NEX

 

And I didn't see ASL in the manual.  But maybe it's on the other models.  I'll double check the settings tonight when I head out.

 

Thanks

Posted May 23, 2014 · 21:34 UTC#12

go to settings > SPEAKER ICON> SCROLL TO THE BOTTOM. IT SHOULD BE THE LAST ONE ON THE LIST

Posted May 24, 2014 · 00:21 UTC#13

That worked on my 5000 to turn it on....was set to 'off'.  Only question, will it work with the speed sensor wire not connected?  Will try it tomorrow.

Posted May 24, 2014 · 00:42 UTC#14

go to settings > SPEAKER ICON> SCROLL TO THE BOTTOM. IT SHOULD BE THE LAST ONE ON THE LIST

Thanks. I'll go back out and check sometime after the rain.

Posted May 24, 2014 · 07:49 UTC#15

I don't speed sensor could be the problem since it tracks accurately up to 72-73.  I've the speed warning option set... perhaps it turns off when you go over the speed limit?  I'll look into it more.  I figure if it works accurately up to 72-72 there shouldn't be anything wrong.

 

thanks.

It can still be the problem... At higher speeds, the processor has less time available to calculate the speed from the GPS data. Using speedpulse this is not a problem, as it involves hardly any calculation.

Posted May 24, 2014 · 16:13 UTC#16

It can still be the problem... At higher speeds, the processor has less time available to calculate the speed from the GPS data. Using speedpulse this is not a problem, as it involves hardly any calculation.

Is the speedpulse you're referring to the VSS?  I'm assuming it was installed because thats how it tracks vehicle speed right?  

Posted May 24, 2014 · 18:08 UTC#17

Is the speedpulse you're referring to the VSS?  I'm assuming it was installed because thats how it tracks vehicle speed right?  

Yes, speedpulse is same as Vss

However, if the Vss is not connected, and/or whilst the unit has not completed calibration yet, the unit will use the GPS signal to calculate distance and speed.

For info on how to check Vss and calibration, see manual pages 159 and 160 (http://www.pioneerelectronics.com/StaticFiles/Manuals/Car/AVIC-8000NEX_OperationManual030714.pdf )

 

The indicated speedpulse (manual page 160, item 4) should increase proportional to actual speed......

 

B.t.w., page 203 etc.explain why you should connect the Vss ... 

Edited May 24, 2014 by jwq
Posted May 26, 2014 · 15:43 UTC#18

Yes, speedpulse is same as Vss

However, if the Vss is not connected, and/or whilst the unit has not completed calibration yet, the unit will use the GPS signal to calculate distance and speed.

For info on how to check Vss and calibration, see manual pages 159 and 160 (http://www.pioneerelectronics.com/StaticFiles/Manuals/Car/AVIC-8000NEX_OperationManual030714.pdf )

 

The indicated speedpulse (manual page 160, item 4) should increase proportional to actual speed......

 

B.t.w., page 203 etc.explain why you should connect the Vss ... 

Thanks again... i'll check that out.

Posted May 29, 2014 · 13:55 UTC#19

go to settings > SPEAKER ICON> SCROLL TO THE BOTTOM. IT SHOULD BE THE LAST ONE ON THE LIST

 

Sorry for the late follow-up but this menu item / feature wasn't available on my 4000nex.

 

Just FYI

Posted May 30, 2014 · 00:56 UTC#20

My $60 Garmin tracks speed very well and without delay. This reminds me of the saying "jack of all trades, master of none"

Posted May 30, 2014 · 13:11 UTC#21

How well does your Garmin work in a tunnel? ;)

Posted Jun 04, 2014 · 16:03 UTC#22

I don't frequent tunnels, but when I do I am not worried about what my speed is indicating on a GPS. If I spent my days going through tunnels I am pretty sure would have no use for a GPS, they are pretty linear.

Posted Jul 09, 2014 · 18:43 UTC#23

I need some clarification on this...

 

Where is this speed sensor connecting to?

 

I will check the settings options mentioned above but what I'm experiencing is that anything over 30mph, the HU will show me  as +3mph over.