Service Interval System - Can it be recoded?

[thrillcat]

Having a strange behavior with my SIS. I had the oil changed a couple months ago, about 1000 miles. At the time, the Service Interval System was reset.

It's already down to the yellow and telling me to think about having my oil changed again... It's done the same thing twice now, after both oil changes I've had done.

I had it changed right away when I purchased it, because I didn't know how long it had been and the SIS was indicating a need. I took it to a quickie place because it was the only place open. Used 100% synthetic but didn't plan on going the full time before having it changed again. About 2000 miles later, the SIS was indicating a need again, and I just had my indy change it out while it was in getting some other things taken care of. Now it's already yellow again...

Any ideas? Could a previous owner have re-coded the SIS? Is it simply faulty?

[Qsilver7]

Here's a link that should answer your question (from back in 2011). I'm not that up on which aftermarket software can do what...but the OP at the link only mentions BMW DIS...but I'm sure one of the aftermarket set-ups may be able to access this info so you can change the interval. Good luck.

Click here: http://www.xoutpost.com/bmw-sav-foru...play-leds.html

[thrillcat]

Excellent, thank you!

[powerstrokenstang]

Lol those thing are crazy ive changed my oil 3 times in the 17000 miles ive had it and it started one bar down and still is only in the yellow.

[Qsilver7]

Originally Posted by powerstrokenstang

Lol those thing are crazy ive changed my oil 3 times in the 17000 miles ive had it and it started one bar down and still is only in the yellow.

If I'm interpreting what you wrote correctly...you started with 4 green LED illuminated...you've driven aprrox 17K miles and the SI display now has the yellow LED illuminated (which means you should have an OIL SERV or INSPECTION light illuminated, too).

Since SIA III uses fuel consumption as the factor as to how the lights LEDs go out. Each of the 5 green LEDs represent 20% of whatever the fuel consumption integer is for your engine/model. If you look at or calculate your average MPG & fuel consumption while watching the mileage of your SI display...your 4.4 V8 probably has a SI interval between 14K-18K miles....so it appears to be pretty close to whatever the setting for the interval should be.

If you've UNLOCKED your OBC...you can run TEST 3 to see what your mileage (in kilometers) was sinc the last SI reset. Or if you rn through the instrument cluster SI display reset procedure but stop before resetting the display...it should jump to the end display and you can see the amount of fuel left to consume (in liters) before the SI display will illuminate for a service.

Since you say that the yellow LED is illuminated...you should see a negative number (example SIA END -XXXX "L")...btw the last digit may look like this "1"...it is many times incorrrectly thought of as a one "1" but it actually a small case "L" and stands for "liters".

You can see some of the info that is revealed when youenter the instrument cluster SI display reset in this pic below from a Blubee thread. The image at the top shows that the yellow & red LEDs are illuminated...thus service is overdue....and the amount of consumed fuel is showing negative numbers (-1136 liters) because of this. But after resetting the display to all green LEDs..the amount of fuel to consume until the next reset changes to a positive number (2575 liters)...again each green LED will represent 20% of the calculated amount of fuel for the interval for her 6 cylinder 530i: