Speedometer Error?

[MadMax]

Has anyone with stock tires on their Yaris ever checked their speedometer against a GPS? If so, what was the difference?

Just looking for GPS versus speedo info.

Cheeers! M2

[Tamago]

do you have ABS or no?

[MadMax]

Errr...no, but I am looking to find out what the speedometer error is on a stock Yaris. I don't know how ABS would factor into that, but I am interested if it does...

Cheers! M2

[Tamago]

Errr...no, but I am looking to find out what the speedometer error is on a stock Yaris. I don't know how ABS would factor into that, but I am interested if it does...

Cheers! M2


if you have ABS, the ECU senses speed thru an average taken from each wheel speed sensor.


generally the ABS cars are more accurate speed-wise (plastic gear in transmission can become worn/inaccurate)

and sorry, i'm no help on what the accuracy is.


crap, my post is useless

[ddongbap]

if you have ABS, the ECU senses speed thru an average taken from each wheel speed sensor.


generally the ABS cars are more accurate speed-wise (plastic gear in transmission can become worn/inaccurate)

and sorry, i'm no help on what the accuracy is.


crap, my post is useless

God, your signature makes me laugh out loud, because according to some, YOU CANT.

[cfiimei]

Mine is balls-on accurate to the GPS. No ABS.

[ka0sx]

I don't use GPS but speed traps read accurately.

[500snakz]

I have a tom-tom and the speedo reads 2 mph faster than the gps.

[Shroomster]

I'm still trying to figure out how the max speed achieved on my GPS reads 158 mph ....

[PetersRedYaris]

if you have ABS, the ECU senses speed thru an average taken from each wheel speed sensor.


generally the ABS cars are more accurate speed-wise (plastic gear in transmission can become worn/inaccurate)

and sorry, i'm no help on what the accuracy is.


crap, my post is useless

Yes, your post is useless. Stop spreading incorrect information... Do you just make this shit up?

Do you honestly believe Toyota uses two seperate systems for measuring speed based on ABS or no ABS? Do you also believe non ABS cars have a speedometer cable running all the way to the guage cluster. :laugh:

Oh, and the Yaris speedo is very accurate, provided stock sized tires are installed....

[Tamago]

Yes, your post is useless. Stop spreading incorrect information... Do you just make this shit up?

Do you honestly believe Toyota uses two seperate systems for measuring speed based on ABS or no ABS? Do you also believe non ABS cars have a speedometer cable running all the way to the guage cluster. :laugh:

Oh, and the Yaris speedo is very accurate, provided stock sized tires are installed....

no.


there is a gear and sensor mounted to the differential portion of of your non-abs equipped yarii transmission

in abs equipped cars the car also monitors speed from the wheel sensors. whether or not the ECU uses this information i'm not sure... most cars yes.. the yaris lol probably not

do you know what you're talking about or are you just trying to sound smart?

have you ever actually worked on a yaris or echo or scion transmission?

[PetersRedYaris]

...there is a gear and sensor mounted to the differential portion of of your non-abs equipped yarii transmission

in abs equipped cars the car also monitors speed from the wheel sensors. whether or not the ECU uses this information i'm not sure... most cars yes.. the yaris lol probably not...

Now your correct... Engine ECU and ABS ECU are usually seperate systems.

...do you know what you're talking about or are you just trying to sound smart?

Funny you should say that, how do you spell hipocrite? I can't seem to remember.

[ChinoCharles]

Hypocrite. :laugh: S'nuff.

My speedo and GPS get about 1 MPH off at high speeds. (65+ MPH)

[Tamago]

Now your correct... Engine ECU and ABS ECU are usually seperate systems.



Funny you should say that, how do you spell hipocrite? I can't seem to remember.

funny that you avoided my question about the C5X transmissions


i've swapped a non-abs trans into an abs equipped chassis ;) i've seen the different wiring harnesses

[ChinoCharles]

S'nuff!

[ddongbap]

Who needs a speedo? I just close my eyes on the freeway, and just FEEL the speed.

[Bob_VT]

Speedo ------ scan gauge --------- GPS all basically the same exact speed. The GPS lags a bit but all give the same readings.

[Tamago]

Who needs a speedo? I just close my eyes on the freeway, and just FEEL the speed.

i'm surprised the yaris came with a speedo actually, since the non-S units are sans-tachometer

[daf62757]

Has anyone with stock tires on their Yaris ever checked their speedometer against a GPS? If so, what was the difference?

Just looking for GPS versus speedo info.

Cheeers! M2

I know that when my GPS says 70 MPH. the speedometer is about 72. I have 15 inch stock wheels...although I had aftermarket mags put on.