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How to read your actual miles from the ECU

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Re: How to read your actual miles from the ECU

Postby lovl850 » 06 May 2011, 01:52

Update: I had to clear a code on the A2 socket before reading again. The ECU now reads 168,808 miles and I have 168,817 on the odometer, that's close enough! :)
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Re: How to read your actual miles from the ECU

Postby maverickbna » 03 Jun 2011, 16:02

Is there any way to get the actual mileage from an OBD-II ECU? I have a '96 850 base model, and the odometer's stuck at 51,723. I just got stuck with a 'not actual' branded title, and now that I know that it's a broken odometer gear, I'd like to get my local Volvo repair shop to get it fixed!

I wouldn't mind repairing other stuff, but this sounds a little too complicated to do the odometer repair!
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Re: How to read your actual miles from the ECU

Postby Swedish Chef » 03 Jun 2011, 16:09

Here's the lnk to retrieving the milage: http://www.brickboard.com/AWD/index.htm?id=680941
I just did it on my '95 obdII so it should work on your '96. good luck!
OOOPS i just noticed its the same as the first thread!
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Re: How to read your actual miles from the ECU

Postby Rudyp213 » 06 Aug 2011, 18:39

Where can i get the Wire that plugs into A7, And where exactly is A7?
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Re: How to read your actual miles from the ECU

Postby Ozark Lee » 06 Aug 2011, 19:17

Welcome to MVS,

The flywire came with the car and the DTC boxes are located just behind the windshield washer fluid filler.

This is specific to port A-2 but it is all the same for the other ports. Once you remove the cover you will see the numbers.

http://volvospeed.com/CheckEngine.php

...Lee
'94 850 N/A
'96 850 N/A
'96 Platinum Edition Turbo
'98 S70 T5
'99 V70XC - RIP Killed by a drunk driver.
Previous: 1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe
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Re: How to read your actual miles from the ECU

Postby 850James23 » 30 Sep 2011, 04:07

More info on getting the mileage for an 850 (mine '94). 2 small covered connector boxes between the washer fluid port and the hood latch. Remove cover to the left box (A), I used a flathead screwdriver from the top, between the boxes, to loosen the clip for the cover. The Flywire is attached to the connector and its metal tip is held in the cover. Pull tip out of the cover and insert into A2 to read codes, A7 for mileage. I plugged wire in, then turned ignition on (to position II), read codes, cleared them, turned ignition off, plugged in to A7, ignition on, read mileage as described.
DO IT, it is VERY easy and so helpful! Odometer broke at 133004 3 years ago and I finally found the energy to fix it, 185,216!. P.N. 13800 from IPD is a little plastic gear ($30) to replace in the back of the instrument pod - also easy, IPD includes DVD with great instructions.
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Re: How to read your actual miles from the ECU

Postby jtwerp » 01 Oct 2011, 17:15

Should the fly wire, have a solid end on it? Mine is a frayed wire, it should still work, right? This is on a 95 850 turbo wagon.
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Re: How to read your actual miles from the ECU

Postby Ozark Lee » 01 Oct 2011, 18:07

Most of the flywires have the frayed insulation but so long as the wire is still hooked up to the plug it should work. Be gentle with it.

...Lee
'94 850 N/A
'96 850 N/A
'96 Platinum Edition Turbo
'98 S70 T5
'99 V70XC - RIP Killed by a drunk driver.
Previous: 1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe
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Re: How to read your actual miles from the ECU

Postby tjts1 » 01 Oct 2011, 22:55

maverickbna wrote:Is there any way to get the actual mileage from an OBD-II ECU? I have a '96 850 base model, and the odometer's stuck at 51,723. I just got stuck with a 'not actual' branded title, and now that I know that it's a broken odometer gear, I'd like to get my local Volvo repair shop to get it fixed!

I wouldn't mind repairing other stuff, but this sounds a little too complicated to do the odometer repair!

I may have something on that in the next few days.
Ambitious but rubbish
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Re: How to read your actual miles from the ECU

Postby petek153 » 02 Oct 2011, 02:37

On 1995 and earlier, you can read the ECU mileage from the diagnostic port as follows:

1. Select module A terminal 7
2. Switch ignition on
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.
92 940 turbo
93 850 GLT sold
94 850 GLT
95 850 GLT
96 850 GLT my parts car (:
96 850 T_BONED ):
97 850 BASE
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Re: How to read your actual miles from the ECU

Postby ERO1 » 24 Oct 2011, 23:22

tjts1 wrote:
maverickbna wrote:Is there any way to get the actual mileage from an OBD-II ECU? I have a '96 850 base model, and the odometer's stuck at 51,723. I just got stuck with a 'not actual' branded title, and now that I know that it's a broken odometer gear, I'd like to get my local Volvo repair shop to get it fixed!

I wouldn't mind repairing other stuff, but this sounds a little too complicated to do the odometer repair!

I may have something on that in the next few days.


Hi guys, I am having the same issue...how to find out the mileage from the OBD II....I took it to my local mechanic and although he could read the codes he did not know how to read the mileage. Neither did a mechanic who specializes in "foreign" cars, nor my Volvo dealership. The dealership told me that they could not retrieve that info on older than '98 model OBD II's. If anyone can tell me how to read the codes it would be very much appreciated! I have no problem fixing the odometer, the tutorial is great and I already have the gears....just would like to be able to set the mileage correctly.....Thanks!
White 1996 850GLT first Volvo.... loving it! :D
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Re: How to read your actual miles from the ECU

Postby dwd » 24 Feb 2012, 02:58

ERO1 (and others), did you figure out a way to get the mileage from the OBD-II ECU?
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Re: How to read your actual miles from the ECU

Postby ERO1 » 24 Feb 2012, 22:47

viewtopic.php?f=1&t=43723

Check this thread as Jimmy57 has the procedure and the tech at my Volvo dealer said that is correct......I did finally find a dealer who could do it for a nominal fee...not many out there.... Good Luck!
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Re: How to read your actual miles from the ECU

Postby 9394volvo850s » 17 Jun 2012, 01:46

i tried this in my 93 5speed 850 and it said there was 157 miles less on the cluster then on the ECU 320K. maybe it broke at one point? lol, my 94 turbo says 190k but ecu says 193k. i bought the 94 from a younger volvo tech so maybe he replaced the gear. also i had that ecu tuned and i used it in my old 95 850 turbo while i was making upgrades to the 94, so maybe thats where some of the miles came from. I cannot get an accurate reading on my T5R wagon. i know the odo was broken on it from the previous owner. odo says 138k he said about 180k actual. i put 3k on the car since ive had it and i just got a possible 184k from the ecu. wich would have ment 181k when i got it so pretty close.
93 850 5spd 320k (the daily)
94 850 T5 190K (race car)
95 T-5R wagon yellow (summer wag)
90 745 5spd 295k (winter wag)
67 122 2 door 4spd 69k :))
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