[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: on-board computer fueling around

>Phil.....I am looking at the on-board computer dip switch page in my
Bentley, for 1984-87.
>You are right saying that it shows 6 permutations of the switches, for
three positive corrections and 3 negative corrections. 
 ALSO, The Bentley shows the "all down" picture in a general overview of
the cluster, that serves to orient the reader as to the location of the dip
switches on the card. The NEXT picture addresses the six permutations. 

SO...I would try the ALL DOWN setting, which is implied by the orientation

>Hope this applies to your later model.
>86 4kcsq
>At 11:09 PM 11/18/97 EDT, you wrote:
>>>Date: Tue, 18 Nov 1997 09:36:25 +0200
>>>From: Gerard <gerard@poboxes.com>
>>>Subject: Re: "Out Of Fuel" warning lamp...progress, I think...
>>>I've got that 1990 (or 1989) 200T with the out of fuel warning signal
>>>coming on t over 1/3 tank. I've made some progress on this. There
>>>are 3 (not 4 as I previously mentioned) dip switches on the back of
>>>the instrument cluster. These fix/adjust fuel consumption figures.
>>>Last week I removed the instrument cluster and slapped all 3 of them
>>>to the opposite settings. The out of fuel signal now does not
>>>come on. Yesterday I removed the cluster again once I had learnt that
>>>the switches were actually for fuel consumption adjustment instead
>>>of for fixing the level at which the out of fuel signal triggers.
>>>I then switches all 3 of the switches back to their original position.
>>>So now I have 0% correction on the fuel consumption and mileage
>>>readings. My tank is under 1/4 tank left now. The amazing thing is
>>>that the out of fuel warning has disappeared. It seems to have been
>>>cured I think.
>>Well, recall that I had mentioned the possibility that your multipin
>>(instrument cluster) connector might be giving a poor contact at the pins
>>that provide the fuel level information. Perhaps in disconnecting and then
>>reconnecting the unit, you inadvertantly improved (cleaned) that
>>As to the FCF (fuel consumption) adjustment via the 3 switches: I am
>>perplexed by the paucity of info given in Bentley. It shows a total of 6
>>combinations of switch positions (out of 8 combinations possible for 3
>>binary switches). These are labelled +5, +10, +15; -5, -10, -15%. Well and
>>good, except...what comination is used to give the null
>>correction??????????   Do you recall what was the "original position" of
>>these switches in your car? Does anyone know the correct switch combination
>>for a "null" FCF correction?
>>'89 100
>>'91 200q
>>         **********************************************
>>         *  Phil & Judy Rose     E-mail:              *
>>         *                       pjrose@servtech.com  *
>>         **********************************************