Can You Get an Odometer Reading When Battery Is Dead

Digital machine odometer-> What happens if the bombardment dies?

• Thread starter JEDI
• Start appointment Dec 12, 2002

Sep 25, 2001

27,701

1,516

126

• #1

My car has a digital odometer. where does it draw it'south power? and what happens if it loses that power? will information technology reset to 000000?

THX

• #two

Aye, and your new car warranty is reset back to twenty-four hour period one likewise.

Nothing happens to the odometer. The mileage is kept in some kind of EEPROM that gets overwritten west/every new mile you drive, but doesn't get erased if it loses power. <--maybe non the nearly technically correct explanation, but it gets the job done.

Then, no; you cannot disconnect the battery on your 1991 Hyundai and sell the car equally new.

• #3

Originally posted past: XFILE
My car has a digital odometer. where does it draw it'south power? and what happens if it loses that ability? will information technology reset to 000000?

THX

I call back it gets reset back to 1960

• #4

Ever heard of something called retentivity ?

• #5

Nope, but if you bulldoze around long plenty to hit all 9'due south, then the car will recollect it's the year 1900 and cease to function.

• #6

My machine has a digital odometer and it never resets when I d/c the battery. I believe that data is stored in the motorcar's computer on an eeprom chip.

Jun 13, 2000

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• #vii

The information is saved in the computer of the car.

• #8

Funny but a customer that hauls pizzas had a buick that was digital and when it hit 200K it reset it self back to 0 and put a little notch on the nuance beside the mileage.

Don't know how loftier any other Digital cars become?

• #9

Originally posted by: XFILE
My automobile has a digital odometer. where does information technology draw it's ability? and what happens if it loses that power? volition it reset to 000000?

THX

Really, I can do better than guessing. My motorcar's got a digital odo.

I'll go out in a couple hours, disconnect the battery, wait a infinitesimal or ii, then mail pics of the outcome

• #x

The information is not saved in the ECM of the vehicle, the digital odometer has it'southward own retention.
Yes there are tools out in that location to reset/modify the mileage, but I'grand not going to tell y'all where, it is illegal to change the actual mileage of a vehicle without doing the proper DMV paperwork.

• #11

Originally posted past: b0mbrman

Originally posted past: XFILE
My car has a digital odometer. where does it draw information technology's power? and what happens if it loses that power? will information technology reset to 000000?

THX

Actually, I can exercise better than guessing. My car's got a digital odo.

I'll get out in a couple hours, disconnect the battery, wait a minute or 2, then postal service pics of the result

If you accept a BMW I hope you lot saved your secret codes for your radio because you'll need them.

<=== Drove around for weeks without a radio bc he couldn't find the security codes for his car after changing the battery.

• #12

Originally posted past: Roger
The data is non saved in the ECM of the vehicle, the digital odometer has information technology'southward own memory.
Yes there are tools out in that location to reset/change the mileage, but I'm not going to tell you where, it is illegal to alter the actual mileage of a vehicle without doing the proper DMV paperwork.

Thats right, merely like when you replace a dash y'all have to have th old one turned in and put the milage either back into the new dash or list it as being changed.

I of the reasons I don't take a car with a Dig. dash. Always agape its going to leave. And a new/reman nuance is not cheap.

• #xiii

Originally posted by: Doggiedog

Originally posted by: b0mbrman

Originally posted past: XFILE
My motorcar has a digital odometer. where does it draw it's power? and what happens if it loses that power? will information technology reset to 000000?

THX

Really, I can do better than guessing. My car'due south got a digital odo.

I'll leave in a couple hours, disconnect the battery, wait a infinitesimal or two, then mail pics of the result

If you have a BMW I promise you saved your secret codes for your radio because you'll need them.

<=== Drove around for weeks without a radio bc he couldn't discover the security codes for his motorcar later changing the bombardment.

Hmmm...I just got a crappy, erstwhile Honda...but I'll check the manuals about taking the proper precuations earlier I pull this petty experiment for XFILE

Sep 25, 2001

27,701

1,516

126

• #15

i know that disconnectin the main battery wont do anything.

i'm assuming that the digital odometer has it'due south own powersource, much similar a figurer's bios.

then it'south burned into eprom huh? hm..where'southward my eprom writer?

• #16

Yous may beable to reset your odometer but the reckoner in the automobile keeps rail of your miles. Heard about someone that used a switch to turn off thier instrumentation cluster (ie no gas guage, no speedo, no odo, etc.). It worked when the switch was off the odom didnt register. However, when they went to turn in the motorcar the dealership was giving it the in one case over they used 1 of thoes little handy computer things to bank check out the cars computer and the odoms didnt lucifer. They allow him keep the car rather than sending him to jail.

• #18

Originally posted by: deftron
Ever heard of something called memory ?

nope

• #19

its stored in an eeprom, probably within the judge cluster itself. If you desire to reset your odometer, you'd accept to pull out that eeprom and do some hacking.

Aug thirty, 2000

26,497

282

126

• #22

Originally posted by: Marlin1975
Funny just a customer that hauls pizzas had a buick that was digital and when it hit 200K it reset information technology cocky back to 0 and put a little notch on the nuance beside the mileage.

Don't know how high any other Digital cars go?

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Source: https://forums.anandtech.com/threads/digital-car-odometer-what-happens-if-the-battery-dies.943681/#:~:text=Yes%2C%20and%20your%20new%20car,erased%20if%20it%20loses%20power.

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