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What's the deal with the 2 odometer readings on "my" Columbia?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Powell-Peralta, Jun 26, 2010.

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  1. Jun 26, 2010 #1
    Powell-Peralta

    Powell-Peralta Road Train Member

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    i'm trying to find out what is the deal with 2 different odometer readings on "my" (assigned) freightliner columbia?

    Sometimes if you scroll through odometer--trip odometer--and hours driven, the next odometer reading is different. Sometimes it is the same and if you shut the engine down and start it back up, you'll again get the 2nd odometer reading?
     
    Powell-Peralta, Jun 26, 2010
    Powell-Peralta, Jun 26, 2010
    #1
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  3. Jun 26, 2010 #2
    Katz

    Katz Medium Load Member

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    One of the Columbias I was assigned to started to show two different odometer readings after a new instrument gauge cluster was put in.
     
    Katz, Jun 26, 2010
    Katz, Jun 26, 2010
    #2
  4. Jun 26, 2010 #3
    Injun

    Injun Road Train Member

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    Is one of the a "leg" odometer and the other a "trip" odometer? I have both on the Cascadia as you scroll through them.
     
    Injun, Jun 26, 2010
    Injun, Jun 26, 2010
    #3
  5. Jun 26, 2010 #4
    Powell-Peralta

    Powell-Peralta Road Train Member

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    That's a possibility, but there are three readings----two different odometer readings and one trip reading. The trip reading can be reset at anytime.
     
    Powell-Peralta, Jun 26, 2010
    Powell-Peralta, Jun 26, 2010
    #4
  7. Jun 27, 2010 #5
    3408

    3408 Light Load Member

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    Mesa, Az
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    Back in the olden days we had hubodmeters and odometers. They rarely if ever displayed the same per trip, or, per shift milage.
     
    3408, Jun 27, 2010
    3408, Jun 27, 2010
    #5
  8. Jun 29, 2010 #6
    Powell-Peralta

    Powell-Peralta Road Train Member

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    Ok, so upon scoping out the owner's manual there appears to be odometer miles and "engine miles" whatever that means?


    Need some freightliner help.


    P.S. it's a detroit if that makes a s...t.
     
    Powell-Peralta, Jun 29, 2010
    Powell-Peralta, Jun 29, 2010
    #6
  9. Jul 3, 2010 #7
    Smalltruck

    Smalltruck Light Load Member

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    The 2 readings are the odometer and the engine computer. The truck OD shows how many miles the truck odometer has gone and the other shows how many miles the engine has gone. And as you noticed they aren't always the same
     
    Smalltruck, Jul 3, 2010
    Smalltruck, Jul 3, 2010
    #7
  10. Jul 3, 2010 #8
    Powell-Peralta

    Powell-Peralta Road Train Member

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    But what is the difference between odometer miles and "engine miles?" Especially when you consider that the ECM is recording and calculating both(i think so, at least?)

    i understand that when you shift, the trans goes into neutral for about a second, but this would not account for an a 80 mile difference between the two? Or would it? NOTE: the truck has approx 336,000 miles on it presently.

    That would be ALOT of coasting...........
     
    Powell-Peralta, Jul 3, 2010
    Powell-Peralta, Jul 3, 2010
    #8
  11. Jul 4, 2010 #9
    Smalltruck

    Smalltruck Light Load Member

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    Even though they are both reading the same data the calibration between the speedo and ECM is what makes the difference. By that I mean they are not calibrated the same
     
    Smalltruck, Jul 4, 2010
    Smalltruck, Jul 4, 2010
    #9
  12. Jul 4, 2010 #10
    otherhalftw

    otherhalftw R.I.P.

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    The engine reading could maybe be what they used to call HOBB hours...it tracks the total time the engine is running, no matter sitting idle, at a light, or cruising the highway.
    since they don't put HOBBS meters on the rigs, they use the ECM computer to track the issue. Just cause your not racking up miles, you are still racking up time on the engine...part of the stats they are watching.
     
    otherhalftw, Jul 4, 2010
    otherhalftw, Jul 4, 2010
    #10
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