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Re: Correcting speedo error
That would be odd, but there 'could' be two different calibrations in
the computer program. I doubt anyone here has a factory manual for a Liberty to tell you for sure. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) budman@frozenorth.ca wrote: > A GPS is as accurate at calculating your vehicle speed as is a 'certified' > speedo in a police car. So when the speedometer in my 2006 Liberty was > registering 107 kph when the GPS was showing 120 kph, I mentioned this at my > next service interval. The mechanic came up with a relatively easy fix. He > re-programmed the computer to make it think I had different sized tires on the > car. He got it dead on. However, the odometer still registers less kilometers > than the GPS records. I have verified the GPS odometer with the markers along > the highway. > > Can anyone confirm that electronically altering the speedometer reading would > not necessarily change the odometer as well? > > Thanks > |
Re: Correcting speedo error
That would be odd, but there 'could' be two different calibrations in
the computer program. I doubt anyone here has a factory manual for a Liberty to tell you for sure. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) budman@frozenorth.ca wrote: > A GPS is as accurate at calculating your vehicle speed as is a 'certified' > speedo in a police car. So when the speedometer in my 2006 Liberty was > registering 107 kph when the GPS was showing 120 kph, I mentioned this at my > next service interval. The mechanic came up with a relatively easy fix. He > re-programmed the computer to make it think I had different sized tires on the > car. He got it dead on. However, the odometer still registers less kilometers > than the GPS records. I have verified the GPS odometer with the markers along > the highway. > > Can anyone confirm that electronically altering the speedometer reading would > not necessarily change the odometer as well? > > Thanks > |
Re: Correcting speedo error
That would be odd, but there 'could' be two different calibrations in
the computer program. I doubt anyone here has a factory manual for a Liberty to tell you for sure. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) budman@frozenorth.ca wrote: > A GPS is as accurate at calculating your vehicle speed as is a 'certified' > speedo in a police car. So when the speedometer in my 2006 Liberty was > registering 107 kph when the GPS was showing 120 kph, I mentioned this at my > next service interval. The mechanic came up with a relatively easy fix. He > re-programmed the computer to make it think I had different sized tires on the > car. He got it dead on. However, the odometer still registers less kilometers > than the GPS records. I have verified the GPS odometer with the markers along > the highway. > > Can anyone confirm that electronically altering the speedometer reading would > not necessarily change the odometer as well? > > Thanks > |
Re: Correcting speedo error
Steve wrote:
> Mike wrote: >> <budman@frozenorth.ca> wrote in message >> news:v7l4d3dda000p6j2ttiaec9b7chpl6srql@4ax.com... >>> A GPS is as accurate at calculating your vehicle speed as is a >>> 'certified' >>> speedo in a police car. So when the speedometer in my 2006 Liberty was >>> registering 107 kph when the GPS was showing 120 kph, I mentioned >>> this at my >>> next service interval. The mechanic came up with a relatively easy >>> fix. He >>> re-programmed the computer to make it think I had different sized >>> tires on the >>> car. He got it dead on. However, the odometer still registers less >>> kilometers >>> than the GPS records. I have verified the GPS odometer with the >>> markers along >>> the highway. >>> >>> Can anyone confirm that electronically altering the speedometer >>> reading would >>> not necessarily change the odometer as well? >>> >>> Thanks >>> >> >> Of course it would alter the odometer too > > And that would be illegal no? > > Steve > Why? You want the odo to be 'real' miles. My CJ7 with 33" tires has an odo gear to make them match the speedometer exactly in 'real' miles. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Correcting speedo error
Steve wrote:
> Mike wrote: >> <budman@frozenorth.ca> wrote in message >> news:v7l4d3dda000p6j2ttiaec9b7chpl6srql@4ax.com... >>> A GPS is as accurate at calculating your vehicle speed as is a >>> 'certified' >>> speedo in a police car. So when the speedometer in my 2006 Liberty was >>> registering 107 kph when the GPS was showing 120 kph, I mentioned >>> this at my >>> next service interval. The mechanic came up with a relatively easy >>> fix. He >>> re-programmed the computer to make it think I had different sized >>> tires on the >>> car. He got it dead on. However, the odometer still registers less >>> kilometers >>> than the GPS records. I have verified the GPS odometer with the >>> markers along >>> the highway. >>> >>> Can anyone confirm that electronically altering the speedometer >>> reading would >>> not necessarily change the odometer as well? >>> >>> Thanks >>> >> >> Of course it would alter the odometer too > > And that would be illegal no? > > Steve > Why? You want the odo to be 'real' miles. My CJ7 with 33" tires has an odo gear to make them match the speedometer exactly in 'real' miles. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Correcting speedo error
Steve wrote:
> Mike wrote: >> <budman@frozenorth.ca> wrote in message >> news:v7l4d3dda000p6j2ttiaec9b7chpl6srql@4ax.com... >>> A GPS is as accurate at calculating your vehicle speed as is a >>> 'certified' >>> speedo in a police car. So when the speedometer in my 2006 Liberty was >>> registering 107 kph when the GPS was showing 120 kph, I mentioned >>> this at my >>> next service interval. The mechanic came up with a relatively easy >>> fix. He >>> re-programmed the computer to make it think I had different sized >>> tires on the >>> car. He got it dead on. However, the odometer still registers less >>> kilometers >>> than the GPS records. I have verified the GPS odometer with the >>> markers along >>> the highway. >>> >>> Can anyone confirm that electronically altering the speedometer >>> reading would >>> not necessarily change the odometer as well? >>> >>> Thanks >>> >> >> Of course it would alter the odometer too > > And that would be illegal no? > > Steve > Why? You want the odo to be 'real' miles. My CJ7 with 33" tires has an odo gear to make them match the speedometer exactly in 'real' miles. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Correcting speedo error
Steve wrote:
> Mike wrote: >> <budman@frozenorth.ca> wrote in message >> news:v7l4d3dda000p6j2ttiaec9b7chpl6srql@4ax.com... >>> A GPS is as accurate at calculating your vehicle speed as is a >>> 'certified' >>> speedo in a police car. So when the speedometer in my 2006 Liberty was >>> registering 107 kph when the GPS was showing 120 kph, I mentioned >>> this at my >>> next service interval. The mechanic came up with a relatively easy >>> fix. He >>> re-programmed the computer to make it think I had different sized >>> tires on the >>> car. He got it dead on. However, the odometer still registers less >>> kilometers >>> than the GPS records. I have verified the GPS odometer with the >>> markers along >>> the highway. >>> >>> Can anyone confirm that electronically altering the speedometer >>> reading would >>> not necessarily change the odometer as well? >>> >>> Thanks >>> >> >> Of course it would alter the odometer too > > And that would be illegal no? > > Steve > Why? You want the odo to be 'real' miles. My CJ7 with 33" tires has an odo gear to make them match the speedometer exactly in 'real' miles. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Correcting speedo error
budman wrote:
Looks at subject, pictures Borat in a green thong/speedo. Pokes eyes with pen. > A GPS is as accurate at calculating your vehicle speed as is a > 'certified' speedo in a police car. So when the speedometer in my > 2006 Liberty was registering 107 kph when the GPS was showing 120 > kph, I mentioned this at my next service interval. The mechanic came > up with a relatively easy fix. He re-programmed the computer to make > it think I had different sized tires on the car. He got it dead on. > However, the odometer still registers less kilometers than the GPS > records. I have verified the GPS odometer with the markers along the > highway. > > Can anyone confirm that electronically altering the speedometer > reading would not necessarily change the odometer as well? Depends on what got reprogrammed. Sometimes there are different offset values for the spedometer and odometer, both need to be changed. I don't have the manual for your Jeeps computer, so I can't tell you if it has two locations. -- DougW |
Re: Correcting speedo error
budman wrote:
Looks at subject, pictures Borat in a green thong/speedo. Pokes eyes with pen. > A GPS is as accurate at calculating your vehicle speed as is a > 'certified' speedo in a police car. So when the speedometer in my > 2006 Liberty was registering 107 kph when the GPS was showing 120 > kph, I mentioned this at my next service interval. The mechanic came > up with a relatively easy fix. He re-programmed the computer to make > it think I had different sized tires on the car. He got it dead on. > However, the odometer still registers less kilometers than the GPS > records. I have verified the GPS odometer with the markers along the > highway. > > Can anyone confirm that electronically altering the speedometer > reading would not necessarily change the odometer as well? Depends on what got reprogrammed. Sometimes there are different offset values for the spedometer and odometer, both need to be changed. I don't have the manual for your Jeeps computer, so I can't tell you if it has two locations. -- DougW |
Re: Correcting speedo error
budman wrote:
Looks at subject, pictures Borat in a green thong/speedo. Pokes eyes with pen. > A GPS is as accurate at calculating your vehicle speed as is a > 'certified' speedo in a police car. So when the speedometer in my > 2006 Liberty was registering 107 kph when the GPS was showing 120 > kph, I mentioned this at my next service interval. The mechanic came > up with a relatively easy fix. He re-programmed the computer to make > it think I had different sized tires on the car. He got it dead on. > However, the odometer still registers less kilometers than the GPS > records. I have verified the GPS odometer with the markers along the > highway. > > Can anyone confirm that electronically altering the speedometer > reading would not necessarily change the odometer as well? Depends on what got reprogrammed. Sometimes there are different offset values for the spedometer and odometer, both need to be changed. I don't have the manual for your Jeeps computer, so I can't tell you if it has two locations. -- DougW |
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