Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

true mileage

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Old Jun 7, 2006 | 02:19 AM
  #1  
t.d.'s Avatar
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Default true mileage

Noticing while researching 850s that the odomoeter seems to break quite often. Whats the trick to pull the true mileage off the ECU?

Thanks
 
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Old Jun 7, 2006 | 12:45 PM
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Default RE: true mileage

Try this


http://volvospeed.com/vs_forum/index...howtopic=23540

Glenn
 
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Old Jun 7, 2006 | 01:06 PM
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Default RE: true mileage

Procedures for ODB-I (model years 1993-1995 and some 1996) r213faq

http://www.matthewsvolvosite.com/cha...pic.php?t=6731
As long as you have the DTC boxes up under the hood ('93-'95).

1. Switch ignition on

2. Connect the fly wire to socket - A7

3. Push button 5 times

4. When LED comes on and stays on, enter code 1-1-1 as follows:
- press the button once when LED is still on
- wait for LED to go out and come on again
- press the button once when LED is still on
- wait for LED to go out and come on again
- press the button once when LED is still on
- read off response, which will be the last three digits of the odometer miles

5. Repeat steps #3-4, but enter code 1-1-2 (that is, press the button twice on the last step); read off the response, which will be the first three digits of the odometer miles. If you have less than 100,000 miles, the first digit will read as 10 blinks.
http://volvospeed.com/vs_forum/index...howtopic=23540
I had printed out. Figured it was worth keeping and credit goes to Gerald C who had provided it:

1. Switch ignition on.
2. Plug wire to module A, terminal 7.
3. Push button 5 times.
4. When LED comes on and before it goes out, enter code 1-1-1 as follows:
- press button once while LED is still on
- wait for LED to go out and come on again
- press button once while LED is still on
- wait for LED to go out and come on again
- press button once while LED is still on
- wait for LED to go out and come on again
- read off the response, which will be the last three digits of the odometer miles or km
5. Repeat steps 3 to 4 but enter code 1-1-2 (that is, press the button twice on the last step); read off the response, which will be the first three digits of the odometer miles or km. Numbers that are zeros will read as 10 blinks.
Procedures for ODB-II (model years 1996 and 1997)

Must have ODB-II DTC Reader with ability to read ECU's stored parameters in memory.
--Edit--
mileage data is stored in odometer gauge cluster
--Edit--
 
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Old Jun 7, 2006 | 08:50 PM
  #4  
tech's Avatar
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Default RE: true mileage

For the OBDII cars the Scanner will have to be able to Read the Instrument cluster. Thats where the milage is calculated.
 
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Old Jun 7, 2006 | 11:50 PM
  #5  
t.d.'s Avatar
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Default RE: true mileage

Awesome info. Thanks alot everyone. So for late 96 and all 97's you MUST have the OBD II scanner to pull the mileage? Was the odometer failure issue primarily in the early model 850's?
 
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Old Jun 7, 2006 | 11:55 PM
  #6  
tech's Avatar
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Default RE: true mileage

It was a problem in all the 850's from 1993 to 1997.
 
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Old Jun 8, 2006 | 10:09 PM
  #7  
t.d.'s Avatar
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Default RE: true mileage

hate to sound completely ignorant here, but where is the "fly wire" located in proximity to the DTC? Is it a pretty obvious testing wire?
 
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Old Jun 8, 2006 | 10:11 PM
  #8  
tech's Avatar
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Default RE: true mileage

It comes out of the A box it is a black wire it should be stuck in the A cap.
 
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