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ecc_33
03-08-2011, 04:03 PM
I put 195/65/r15 tires on my yaris to make it roll better on the freeway bring the rpms down. My speedo is off about 3 mph and the local dealer said they can't adjust it. Does anyone know if they are feeding me a line or am i screwed
CTScott
03-08-2011, 04:11 PM
They are correct - The Yaris does not have any way of adjusting the speedometer other than changing the gear in the sender unit (and there are only two options - one for the 15" wheels and one for the 14" wheels).
yaris2010RS
03-08-2011, 05:19 PM
its actually not as easy as it just being off by 3mph, its more likely off by between 3 and 5% if u cannot live with the 3mph issue, take the cover off and move the needle 3mph up on the scale. but ur slow speed measurements will be off
ecc_33
03-08-2011, 05:38 PM
na I can live with it. Just wondered if the guy was blowing smoke or not. Thanks guys
ecc_33
03-08-2011, 07:47 PM
just curious but I think I already know the anwser. The scan gauge and ultra gauge reads off the same sensor the gauge cluster does. So my only true hope is my gps. Not a big deal just thinking out loud
CTScott
03-08-2011, 08:33 PM
just curious but I think I already know the anwser. The scan gauge and ultra gauge reads off the same sensor the gauge cluster does. So my only true hope is my gps. Not a big deal just thinking out loud

Correct.