<E-30> OBC range PS

[Michiel van Wessem <jmvw@xxxxxxxxx>]

I ran low on fuel yesterday and the orange light came on. The OBC 1000 + 1
display read 5.0 l, not 11.5 l as I said before. So 5.0 liter is probably
what it should be adjusted to.

Michiel

>Hi (Terry/Mike ?)
>
>It's two days since you posted your message, so maybe you've found the
>answer already, but I had the same problem. There's a little adjustment
>dial (variable resistor or capacitor) in the bottom left or right corner of
>the OBC. There's a little round plastic cover over it with a small hole in
>the center. You can pry it out with a paperclip or needle or something and
>then you can insert a small screwdriver. Drive the car until the orange
>fuel tank empty light comes on and then adjust the thing. First press the
>1000 and 1 button on the OBC simultaneously so that it will display how
>many liters of gas the OBC thinks are in the tank. Then adjust the thing
>until it displays something like 11.5 liter (I think, or whatever else is
>supposed to be there when the orange light comes on).
>
>That fixed it (to my surprise). The range display still isn't really
>precise on my car, but it does work. Maybe your OBC is a newer version and
>they got more accurate. On my car, it's just kind of a gimmick.
>
>Good luck,
>
>Michiel (87 325es <http://www.monmouth.com/~jmvw/cars/BMW/> )
>
>At 06:44 PM 2/10/00 EST, Terrymikeath@domain.elided wrote:
>>The OBC on my 88 325iS works perfectly except for the range function (miles 
>>till empty).  It registers correctly when the tank has been filled, and 
>>begins to decrement down (registering less miles till empty) as I drive.
At 
>>approx. 1/2 tank, the countdown slowly tapers off, and the indicator
remains 
>>at about 220 miles from then on, no matter how much further I drive, or how 
>>low the tank gets.  Fuel gauge works fine, and no, I haven't just driven on 
>>to see if I have entered a time warp and been gifted with a BMW that will
>run 
>>forever without refill.  I have disconnected the battery and completely
>reset 
>>the OBC several times to no avail.  Anyone with an answer?  Thanks, Mike t. 

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