View Full Version : GPS Speed display in RNS510?
BlackSuperb
08-10-2009, 09:07 AM
How do I get the RNS510 to display the the GPS speed on the screen? I've read the manual but just can't seem to find it. I know it will be something really obvious, but I'm stumped.
I have a new black Superb with the factory fitted nav system, I think it's an RNS510. How do I find out the model and the map database version?
Thanks. :confused:
Swallowtail
08-10-2009, 09:31 AM
I don't think that you can... anyone else chip in?
Re model and map version, you will need to enable the "hidden" menu.
http://www.my-gti.com/1078/entering-setup-on-the-rns-510-with-recent-firmware
NicZA
08-10-2009, 11:44 AM
How do I get the RNS510 to display the the GPS speed on the screen? I've read the manual but just can't seem to find it. I know it will be something really obvious, but I'm stumped.
I have a new black Superb with the factory fitted nav system, I think it's an RNS510. How do I find out the model and the map database version?
Thanks. :confused:
I don't think it's an option, my MFD2(Predecessor to RNS510/MFD3) doesn't have it. Might be some sort of manufacturer requirement, along the lines of why the GPS speed doesn't match what the Speedometer displays.
BlackSuperb
08-10-2009, 12:52 PM
Thanks for the replies.
It's the first time I've had a GPS that was integral in the car, previously relying on TomTom on a mobile phone or PDA for nav. I'm missing the GPS speed readout. All the cars that I have driven were over reading the speed on the speedo by quite a bit (except a Commodore believe it or not).
I'll just crank up the old mobile phone to compare speedo/GPS on the new car and will calibrate my driving on the new Superb from there.
At least it's easier to read the RNS510 than a 2.5" mobile phone - but a pain in the butt to load 15 gigs of music!
Graybags
08-10-2009, 02:47 PM
I know with our mkv golf if you push the econ and Up vent buttons together you have access all the ecu parameters including digital speed display. The Golf has a big difference between digital(true) speed to that shown on the dial.
Not sure if Skoda's have the same thing available.
-gt
NicZA
08-10-2009, 05:52 PM
I know with our mkv golf if you push the econ and Up vent buttons together you have access all the ecu parameters including digital speed display. The Golf has a big difference between digital(true) speed to that shown on the dial.
Not sure if Skoda's have the same thing available.
-gt
That they do, alternatively my E-MFA add on displays those values on the MFD, much easier to see than down at the climate controls :P
woofy
08-10-2009, 07:58 PM
Thanks for the replies.
It's the first time I've had a GPS that was integral in the car, previously relying on TomTom on a mobile phone or PDA for nav. I'm missing the GPS speed readout. All the cars that I have driven were over reading the speed on the speedo by quite a bit (except a Commodore believe it or not).
Not so unbelievable, Commos and Falcons are calibrated bang on, I've found Mazdas are usually 5km/hr exactly overreading, probably Mazda avoiding trouble there, and the Skoda is over as well, from memory you can adjust it via the MFD menu though.
BlackSuperb
09-10-2009, 07:44 AM
That they do, alternatively my E-MFA add on displays those values on the MFD, much easier to see than down at the climate controls :P
I'm going to have to brush up on my acronyms here, not sure what the E-MFA is?
However, I believe the digital spead display via the MFD (that's the Multi Function Display between the tacho and speedo I'm guessing) is only a digital version of the same speed as displayed by the speedo rather than GPS speed?
Transporter
09-10-2009, 07:55 AM
I'm going to have to brush up on my acronyms here, not sure what the E-MFA is?
However, I believe the digital spead display via the MFD (that's the Multi Function Display between the tacho and speedo I'm guessing) is only a digital version of the same speed as displayed by the speedo rather than GPS speed?
Look in E-MFA installation sticky thread. :) It is add on.
Graybags
09-10-2009, 03:33 PM
I'm going to have to brush up on my acronyms here, not sure what the E-MFA is?
However, I believe the digital spead display via the MFD (that's the Multi Function Display between the tacho and speedo I'm guessing) is only a digital version of the same speed as displayed by the speedo rather than GPS speed?
No its not a GPS speed but the true speed the car sensors its doing before they add the offset to indicate a slower speed on the dial, I think its mandatory but could be wrong. Ours is digital display is pretty much spot on to tomtom gps speed, and shows same as speed detector on Calder hwy as well. At 119kmh on digital display and tomtom speedo shows 110kmh.
Swallowtail
09-10-2009, 04:35 PM
I tested mine this morning -
At an indicated 101 / 102 on the speedometer the MFD digital readout said I was doing 100 (and the cruise control was set to 100). The display in the AC controls (press up vent and AC buttons and the same time, then roll the left hand temp dial so it reads 19, then the right hand display show speed) was reading 92 / 93.
To me that is too much - at an indicated 102 I'd be fine with actually doing 98 or so, not 92. Just as likely to have people trying to climb up my rear on the freeway cos I'm going too slow.
You can change the margin of overreading in VAGCOM I believe. I need to do some digging...
dazag
10-10-2009, 09:06 AM
I remember reading a post in www.briskoda.net that suggested how you could adjust the speedo calibration via the MFD - Does anyone have a link to that?? I've like to re-adjust mine to be more in line with the GPS, and also correctly set up the Fuel Economy settings to match.
Fuel economy is based on distance travelled and fuel consumed not speed. Generally the odometers on cars are accurate (way more accurate than the speedos) so your fuel economy readings should not be affected by a speedo that is optimistic.
Transporter
10-10-2009, 05:38 PM
I remember reading a post in www.briskoda.net that suggested how you could adjust the speedo calibration via the MFD - Does anyone have a link to that?? I've like to re-adjust mine to be more in line with the GPS, and also correctly set up the Fuel Economy settings to match.
I don't know how to do it in MFD but you can also adjust both independently in VCDS (vag-com).
Swallowtail
10-10-2009, 06:17 PM
I tested mine this morning -
At an indicated 101 / 102 on the speedometer the MFD digital readout said I was doing 100 (and the cruise control was set to 100). The display in the AC controls (press up vent and AC buttons and the same time, then roll the left hand temp dial so it reads 19, then the right hand display show speed) was reading 92 / 93.
To me that is too much - at an indicated 102 I'd be fine with actually doing 98 or so, not 92. Just as likely to have people trying to climb up my rear on the freeway cos I'm going too slow.
You can change the margin of overreading in VAGCOM I believe. I need to do some digging...
OK, found the bit in VCDS to change it. The scale is from 0 to 7. Mine was already set to 6! :eek: So I set it to 7 and we went for a drive this morning. It's a little better - now an actual 100 is an indicated 105 / 106.
So that's an improvement at least.
Did a couple of other bits in VCDS while I had it connected - set emergency braking to activate flashers (common in Europe), and fixed up my rain sensing auto-close sunroof / windows.
Fuel economy you can set within a range of 85 to 115%. Comes from factory at 100%. SO if you work out that it is wrong you can adjust it using VCDS.
gregozedobe
10-10-2009, 06:21 PM
Fuel economy is based on distance travelled and fuel consumed not speed. Generally the odometers on cars are accurate (way more accurate than the speedos) so your fuel economy readings should not be affected by a speedo that is optimistic.
True, but the fuel consumption reading on the MFD is (usually) also optimistic, and can be adjusted too (separately). But to be fair, Skoda readings seem to be a lot more accurate than VWs.
dazag
11-10-2009, 07:43 AM
Fuel economy is based on distance travelled and fuel consumed not speed. Generally the odometers on cars are accurate (way more accurate than the speedos) so your fuel economy readings should not be affected by a speedo that is optimistic.
Strange, I thought you're odometer is tied to your speedo. So if I sit on 110km/h on the freeway for an hour, my odometer should read that I've traveled 110km over that hour. So what you're saying is I can sit on 110km/h but my odometer will be reading the speed different to be more accurate?? I don't think so, unless they receieve different speed signals?
Or you saying the fuel Economy readout should be accurate knowing that the Speedo is out a little it compensates??
What's the deal with the VAGCOM, please explain??
Swallowtail
11-10-2009, 09:14 AM
The car gets the speed and has that internally. That can be seen through the Air con display. The odometer is driven from that. Then a variable is introduced for the speedo, so that it will never under-read. That is called the distance impulse. It is modifiable within a certain range using VAGCOM - www.ross-tech.com.
Gav23
11-10-2009, 11:16 AM
Are all German cars speedo's this far out, or just VW's? I can't imagine I'd be impressed if I spent $150K on a Merc and it's speedo was out 10%! :eek: If Falcadore's and Hyundai's can have speedo's accurate within 2km (well the ones I've driven anyway), why can't VW?
Taking 10% off isn't difficult, but it is an unnecassary distraction to your driving, especially in busy city traffic.
Graybags
11-10-2009, 02:03 PM
The speedo being out isnt a fault, just tweeked to indicate slower speed to stop people being fined, just that they are overly cautious in their tweeking.
gregozedobe
11-10-2009, 06:00 PM
IIRC the story is that manufacturers are covering themselves for the scenario when an owner fits tyres that are nominally the same size as std but actually have a larger rolling diameter, so the speedo now reads slow. If the speedo was accurate before, they could now be driving along with the speedo indicating right on the spped limit, but their car is actually travelling 3kmh over so they get booked, blame the manufacturer and then sue the manufacturer for causing it. (if in doubt - blame lawyers and the legal system :banana: )
Gav23
11-10-2009, 07:22 PM
If getting sued for speeding because of driving tyres other than the standard ones that come on the vehicle, why don't they just put a clause or warning in the owner's manual instead? And if getting sued is such a great concern, why doesn't every other car manufacturer have such a massive gap in odometer speed and actual speed?
BlackSuperb
11-10-2009, 09:19 PM
I believe the NSW RTA limits for a calibrated speedo is a maximum of 9% over read and 0% under read.
Anything above or below those limits and you need to renew/recalibrate your speedo.
Speedo calibration is covered by Australian Design Rules not state based road transport authorities. If that is what the NSW RTA are saying then it will be an Australian Standard.
I actually thought they were moving to a +5% allowable error, the previous one was +10%.
Edit:
A quick Google just found this ADR (click for link) (http://rvcs-prodweb.dot.gov.au/files/ADR%201803.pdf). I'm not sure whether it's the current standard but if you want to read through on about page 10 you will find this;
"5.3. The speed indicated shall not be less than the true speed of the vehicle. At the test speeds specified in paragraph 5.2.5. above, there shall be the following relationship
between the speed displayed (V1 ) and the true speed (V2).
0 ≤ (V1 - V2) ≤ 0.1 V2 + 4 km/h"
along with a detailed list of the test procedure requirements.
Maverick
12-10-2009, 06:49 PM
Speedo calibration is covered by Australian Design Rules not state based road transport authorities. If that is what the NSW RTA are saying then it will be an Australian Standard.
The ADR is based on UNECE 39/00 (Rev 1).
I actually thought they were moving to a +5% allowable error, the previous one was +10%.
It used to be +/- 10%. Victoria and NSW IIRC "overrode" this and only allowed a car to be ~3% under despite cars being allowed under the ADR to be 10% under hence the 3kph leeway in Victoria for speed cameras.
A quick Google just found this ADR (click for link) (http://rvcs-prodweb.dot.gov.au/files/ADR%201803.pdf). I'm not sure whether it's the current standard but if you want to read through on about page 10 you will find this;
"5.3. The speed indicated shall not be less than the true speed of the vehicle. At the test speeds specified in paragraph 5.2.5. above, there shall be the following relationship
between the speed displayed (V1 ) and the true speed (V2).
0 ≤ (V1 - V2) ≤ 0.1 V2 + 4 km/h"
along with a detailed list of the test procedure requirements.
That is the current standard.
I have some info here including how to adjust it using Vagcom/VCDS - Volkswagen Speedometer Error Correction (http://www.my-gti.com/140/).
Graybags
12-10-2009, 07:56 PM
Excuse my ignorance but how do you access VAGCOM? Do you need a cable? Laptop?
-Gt
Swallowtail
12-10-2009, 08:09 PM
Excuse my ignorance but how do you access VAGCOM? Do you need a cable? Laptop?
-Gt
It's a combination of software and a special cable - www.ross-tech.com will enlighten you... :D
It used to be +/- 10%. Victoria and NSW IIRC "overrode" this and only allowed a car to be ~3% under despite cars being allowed under the ADR to be 10% under hence the 3kph leeway in Victoria for speed cameras.
That's not quite correct.
The ADR is still the ADR and vehicles must comply with the ADR.
What Vic and NSW did was to stop accepting the ADR as a defence for speeding so you can be happily driving in one of those states with your speedo showing exactly 100kph but if you are actually travelling at 105kph because your speedo is (legally) reading slow you will get booked and you have no defence.
Also in Victoria at least the allowance is 3kph not 3%. If you are doing 53 in a 50 zone you are okay, 54 and it costs you $146.00, if you are doing 103 in a 100 zone okay but 104 costs you $146.00
Maverick
12-10-2009, 10:36 PM
That's not quite correct.
The ADR is still the ADR and vehicles must comply with the ADR.
What Vic and NSW did was to stop accepting the ADR as a defence for speeding so you can be happily driving in one of those states with your speedo showing exactly 100kph but if you are actually travelling at 105kph because your speedo is (legally) reading slow you will get booked and you have no defence.
Also in Victoria at least the allowance is 3kph not 3%. If you are doing 53 in a 50 zone you are okay, 54 and it costs you $146.00, if you are doing 103 in a 100 zone okay but 104 costs you $146.00
Except you do have a defence, if you have you car tested to show that it's reading within the ADR's this is a valid defence. What you can't do is show up in court and claim your speedo can be + or - 10% and expect it to be accepted.
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