Issues with navigation mileage differing from odometer - JeepForum.com
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post #1 of 18 Old 09-11-2012, 11:25 AM Thread Starter
musclezmarinara
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Issues with navigation mileage differing from odometer

My 2012 arctic Liberty is having issues with the oem navigation and the odometer not matching mileage.

The navigation system shows
10,890

The odometer shows 10,350

The dealer has no idea why it's not matching.

Only idea was that the larger tires are causing the mileage to be off?

Jeepcares can you assist?

Anyone shed some light?


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post #2 of 18 Old 09-11-2012, 12:36 PM
matteagle
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If you have larger than factory tires that's certainly what's causing it. The odometer calculates off tire spin based on size.

I THINK they can starscan it to the correct size. Your nav would be the correct number of miles. I'm not sure if they can change the odometer (I assume yes)

-Matt

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post #3 of 18 Old 09-11-2012, 01:47 PM
tjkj2002
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Yep the non-stock sized tires are your issue.

'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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post #4 of 18 Old 09-11-2012, 01:53 PM
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Educated guess - I agree with matteagle. When you're driving, is your speedometer registering right?

The nav would be right because it uses satellites to determine positioning.
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post #5 of 18 Old 09-11-2012, 09:30 PM Thread Starter
musclezmarinara
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Quote:
Originally Posted by JeepCares
Educated guess - I agree with matteagle. When you're driving, is your speedometer registering right?

The nav would be right because it uses satellites to determine positioning.
Speedo is correct ... Verified by outside gps.... Also dealer said they couldn't change tire size I will have them check it again when I go back for the break boot replacement and weatherstrip

Thanks guys sad to know I have more mileage than I thought lol

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post #6 of 18 Old 09-11-2012, 11:17 PM
matteagle
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what tire size did you replace the stock 235/60s with

-Matt

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post #7 of 18 Old 09-12-2012, 01:54 AM
marlon_jbt
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The navigation is getting its estimated miles from a GPS signal.
The odometer is getting it from the wheels.

You have oversized tires. GPS isn't 100% accurate all the time. A bad signal will cause errors in speed and distance. My Jeep has WAY more miles on it than it actually says because I've been running oversized tires on it since almost new.

There's no actual problem here.

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post #8 of 18 Old 09-12-2012, 02:19 AM
S8NNG8
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Quote:
Originally Posted by marlon_jbt
The navigation is getting its estimated miles from a GPS signal.
The odometer is getting it from the wheels.

You have oversized tires. GPS isn't 100% accurate all the time. A bad signal will cause errors in speed and distance. My Jeep has WAY more miles on it than it actually says because I've been running oversized tires on it since almost new.

There's no actual problem here.
Actually, your mileage is correct if you think in terms of maintenance. Regardless of tire size, your axle shafts and gears have turned that many times. But, as we all know, the weight of the larger tires tears things up, so it's all in how you wanna look at it. I say it's close, get over it.

D3<!L!>3D
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post #9 of 18 Old 09-12-2012, 06:48 AM
Eagle112199
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Where do you check to see what the NAV system has for mileage? I wasn't aware it kept a secondary record.

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post #10 of 18 Old 09-12-2012, 05:02 PM
tjkj2002
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Quote:
Originally Posted by marlon_jbt View Post

GPS isn't 100% accurate all the time. .
I can vouch for that comment.



Notice the max speed? And yes that is in miles per hour.

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post #11 of 18 Old 09-12-2012, 07:13 PM
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Warp speed Scotty
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post #12 of 18 Old 09-12-2012, 08:43 PM Thread Starter
musclezmarinara
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Its in the NAV portion under " view map " click the spot bottom most box and the screen will appear Ill post a pic.

Close enough is good enough in the jeep world

the tires are 245/75/16 nothing to crazy

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post #13 of 18 Old 09-13-2012, 12:47 AM
matteagle
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Quote:
Originally Posted by musclezmarinara View Post
Its in the NAV portion under " view map " click the spot bottom most box and the screen will appear Ill post a pic.

Close enough is good enough in the jeep world

the tires are 245/75/16 nothing to crazy
well this is weird, i just took the rev/mile and compared the ratio between the two to your miles and it was a bigger difference. hmm

-Matt

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post #14 of 18 Old 09-13-2012, 06:23 AM Thread Starter
musclezmarinara
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Here u go



image-3348718334.jpg



image-2531452537.jpg

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post #15 of 18 Old 09-13-2012, 10:32 PM
fairmont1998
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I can't access that page on my 2012 :S
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