To Determine the mileage on a Volvo 850 if the odometer doesn’t work….



The answer depends on year. For '93-'95 models with the diagnostic ports under the hood near the ECU box, the answer is yes. Follow this procedure:

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.




This is how to determine the true mileage on the Volvos with the underhood DTC boxes. I have not seen the '96 and newer ones able to do this through the OBDII port.



Mike
'95 850T