mileage on computer

[solo.cab]

Is it possible to calibrate the trip computer so that it gives realist mpg rather than the reading I am getting which going from brim to brim are about 4mpg to much,23 computer 18.5 brim to brim.
Mal

[David3807]

Yes its possible. This thread should tell all :lol:

http://www.the75andztclub.co.uk/foru...er+Calibration

Having said that I re calibrated my saloons MPG display by trial and error but when I got the tourer I just found out the difference between actual and display (which was about 3 MPG) and now just knock off 3 from the display '

Lazy way of course but I have always had trouble getting into the IPK diagnostics

[robwijnstok]

Like in David's link, it is easy to do.
Best way is to make an Excel sheet and calculate at every refuel your correction factor, but not change it yet in your OBC yet!! After 10 calculated factors, take the average of those factors, and use that in your OBC. The more calculations you average, the more precise it will be.

Yesterday I was changing mine again because of cam belt change (engine is more economically now). While I was playing with the Excel sheet I saw that my OBC, after I had changed the correction factor more than a year ago, was on average exact what it should be.

Edit;
For opening the OBC you can try to put your key in position one. Then push the trip button, and just hold it for 5 or 6 seconds, and the "test" message will be displayed. Then follow the instructions in the link of David. After changing or watching the features of your OBC you can close the OBC again by switching off with your key, or press the trip button again for 5 or 6 seconds.