1. Set ignition switch to position 2
  1. Press Set/Reset and Clock simultaneously to enter service mode – display reads 1
  2. Press stalk switch to reach required function 1 to 5:
1 – 12/24 hour clock operation
2 - Display test – all segments operate
3 – MPG adjustment
4 – Acoustic warning test
5 – Temperature indication in F or C

(4) These functions are adjusted by the Clock button, and stored by the Set/Reset button. As an example, I selected option 3 to trim the fuel consumption reading.

(5) Display reads (factory setting) 1000

(6) Press Clock to change reading upwards to 1250. Keep pressing to reach 750 and count upwards to a new setting. I found that on 245-40 X 17 inche rear tyres a setting of 1021 gives a readout within plus/minus 1 or 2 mpg when compared to a calculated figure.

(7) Press Set/Reset to save new setting.

(8) Turn off ignition to return to normal operation.