I have a 2004 MCS that is completely stock. My question is the gas mileage. On the OBC shown on the tach is always 5 to 6 mpg higher than the actual mileage. I fill up the car and divide the miles by the gallons purchased. I'm using the divide the mileage by the gallons as the actual mileage. Can I adjust the OBC to reflect the actual mileage while driving? Thanks for the help.

 

Is this down to the difference between an Imperial and US gallon? Sounds about right for the difference, but I'm too tired to figure out if that makes sense logically at the moment.

 

I came across this recently, and I book marked it in one of my computers. -can't remember which one, but I plan to find it again.

The thread may have been unrelated, about resetting the ecu, and this thing about how to add a Factor to the OBC's calculation of MPG was at the bottom of the list of things to do in tEST mode.

 

Here, this might work. It's option #20

Let me know if it works, I have not tried it but may do so tomorrow time permitting.

I've been wanting to try this.

 

After option 20 ?

 

How to Reset the ECU:

1. With the key in the ignition, but in the off position, press and hold down the odometer reset button with one hand, while holding the button down, switch the key in the ignition to position 1 (first click) with the other hand. The screen will have a number and the word “tESt”. Scroll through the numbers by pressing the odometer rest button, through to 19 and wait a moment. (Note: the number order is: 1,2,10,19) The message will say 19 "L i-off", flash to "L i-on", and back to "L i-off" again. When "log i-off" appears, press the odometer rest button again. You are now in the system. Scroll through to 21. tESt and wait a moment. 21.0 rESEt will come up. Press the button once.
2. Your gauges will now make some sounds and movements.
3. Once the lights come back on start your car. You have now reset your ECU and your MINI is now ready to relearn the new mods and your driving style.

Here is a list of all the tests on your MINI:
1.0 Chassis number
1.1 Kilometer count
1.2 Parts number
1.3 Coding-, Diagnostic- and Bus-index
1.4 Production Date (Calendar week/year)
1.5 Hard- and Software status
1.6 Injector status, Cylinder count, Engine factor.
2.0 Comb system Test
3.0 Service interval counter
4.0 Actual fuel consumption in l/100km. eg.0154 = 15,4 liters/100kms.
4.1 Consumption in liters/100kms.
5.0 Distance consumption in l/100kms.
5.1 Actual rest distance with available fuel in Kms.
6.0 Actual amount of fuel in tank. eg. 123321 =12,3liters left 32,1 liters right
6.1 Total amount of fuel in tank.
6.2 Show value of Fuel gauge.
1= both senders OK, 2= sender failure, 3=ti signal implausible (no reading)
7.0 Actual coolant temp.
7.1 Actual outside temp.
7.2 Actual engine revs.
7.3 Actual speed
8.0 Hexadecimal readings of menu 7.0 to 7.3
9.0 Actual on board voltage (Battery)
10.0 Land codes
11.0 Unit codes
12.0 No function
13.0 Gong test
14.0 - 14.4 On board diagnostic codes. eg 000000 = no failures
15.0 - 18.0 No function
19.0 On/Off for Test menu.
20.0 Correction factor for Fuel consumption Formula for correction:
Shown consumption x 1000 / user defined consumption
Push the trip reset button to begin the correction. Numbers count up from 0-9, when correct number shows push trip reset button.
20.1 Sets 10ths. for consumption factor
20.2 Sets 100ths. and 1000ths. For consumption factor
20.3 saves the new consumption factor and shows new value
21.0 Software reset. (Same as disconnecting battery) __________________

 

Lol,.. Forgot to paste the link. Thanks for fixing that Braminator. ::smile

 

 

Thanks to everyone! I'll give it a try.
Tosa Mini