Perhaps it has something to do with the japanese model having smaller tires? Maybe somthing wrong with the conversion to USDM models? Just a thought. :?

 

Yes, if the odometer were calibrated for smaller tires, then the odometer would read too low with the xb's 15 inch tires.

 

I beleive all Scion's (well at least xA's and xB's) come with a port inspection. One of the items on there is ODO readings... maybe someone left something out on the inspection proceedureals...

 

Nope, the speedo and odo don't have the same error. My speedo reads about 2% high, while my odo reads 4.5% low.

These are common errors in production cars. The manufacturers don't want to be blamed for speeding tickets, or for attempting to defraud owners on warranties, so the errors are almost always the same, speedo reading high, odo reading low.

George

 

The JDM bB has 185/65R15 tires. The US market 185/60R15 tires are smaller in diameter than the JDM tires!

George

 

Wow! I didn't even check. I just assumed... silly me :oops:

 

I think I know the answer:

The Echo has 175/65/14 as standard tires. The Scion's 185/60/15 tires are 3.4% larger than the Echo tires in diameter.

I bet Toyota went cheap and just used the Echo calibration for the odometer?

 

Any solutions to this dilemma? i have a customer that put 20's on his xB and would like to correct the speedo. He has called all of the local tire shops and even a speedometer shop. Anyone have any resources?

 

Unfortunately most of the speedometer recalibration devises do not work on cars with certain types of ABS. I was going to order one called the Yellow Box, but the technician from the company told me that it probably wouldn't work on our rides. Here's a link to the product. The tech told me it might work, but no guarantee.
http://www.ricks2k.com/products/yellowbox.php

 

Thanks...I'll Pass it on!!

 

xA has same problem...or is it a problem?

 

okay, not to be a nerd , but if the mileage is reading 5% low, then the mpg should increase by MORE than 5%. Why?

Because if you actually travel 100 miles but the odo shows only 95 (a 5% low reading). You would have calculated your mpg using the 95 figure which is 5% lower than it should be. SO, to correct and calculate the corrected mpg, assuming the 5% error value is constant and accurate, you would multiply the incorrect mpg value by 5/95, which is an increase in the mpg of 5.26%, not 5%.

:-)

 

I'm glad that someone else thinks of these details!

George

 

vv

 

??

 

what????.....

 

well i may have the same prob. i called service center and told them i dont get the estimated mpg. they said i will see the estimated after 10k miles. so if the odo is off this may be also a prob. i usualy get 245 miles at 1.5 or 2 gallons left in the tank