[urq] Need to Get a Specific Electronic Speed Signal From an UrQ Speedo......

[Martin Pajak]

Hi Guys,

Yes, trip computer worked just fine using DigiDash and 3B computer signal.
I believe it's pin #3 from memory.
THe 7A signal does not work with the Digi.  Don't know if it's the signal
or lack there of, but I tried two computers and two Digis and no luck.

Thank you
-- 
Martin Pajak

http://www.quattro.ca

1982 Audi Ur-quattro, SQ project
1983 Audi 80 quattro, Euro 2-Tür
1986 Audi 4000cs quattro, 2,5 TDI mit 6 gang
1987 Audi 4000s quattro, wintervagen mit 7A und 5 bolt :)



> Steve Eiche
> Patrick,
> On the MB and RR the diff lock, and radio GALA ARE definitely connected
> in parallel.   It is on the RR and MB schematics and connected that why
> in the factory RR harnesses that I have.  I'm not sure why you saw the
> behavior that you have.  ETKA says that there is only one diff lock
> module - 893 919 173, that is shared by all the cars with electronically
> controlled diff locks.
>
> I have no BTDT on the 7A ECU signals.  All I know is the I5 turbos and
> later ME5 cars.
>
> The fuel consumption signal on the RR (and I would bet 3B as well, as it
> is virtually the same ECU), goes directly to the dash.  It is a DC level
> I believe, that mimics the behavior of the old throttle plate pot
> wiper.  I believe Martin P. confirmed that the 3B ECU fuel signals
> worked with the CGT digi on his Euro '85.  I don't know much about the
> 7A signals, but I bet that they would be the same.
>
> Hope you guys all wrote this stuff down.
>
> Steve Eiche
> Shade Tree Software, LLC
> http://www.shadetreesoftware.com
> seiche at shadetreesoftware.com
> 800.419.6896 ext. 902
> 303.940.2468
>
>
>
> Patrick Carlier wrote:
>> Steve ,
>>
>> Interesting stuff you send here .
>>
>> I do agree that the diff lock , radio GALA , CC etc are in parallel .
>> But the VSS signal is coming from the instrument cluster , not
>> from the speed sensor . That is according to the wiring diagrams I have
>> .
>>
>> I can also agree that the reed contact should be capable of driving
>> the digital dash .
>> If it's internally pulled up to 12V . Quite possible .
>> Maybe I should have tested it before I modified my six speed gearbox
>> to receive the old sensor .
>> Never bothered , as the mechanical conversion was easy enough .
>>
>> About the dif lock .
>> I tried feeding the ur-q speedsensor signal directly to the diff lock
>> unit .
>> Diff lock unit was taken from a late 20Vcoupe quattro , not from an
>> ur-q !
>> And that gave the behaviour I described .
>> Possably , if there's an ur-q diff lock unit available , wich I didn't
>> knew ..
>> Maybe it is a different part number then the 20V unit I'm using  .
>> I know for sure the cc controller is different for the early and later
>> style cars and I
>> assumed it had to to with the difference in speed signals . .
>> Didn't have the lock switch input wrong , can't be cause the switch
>> itself is still functioning .
>>
>> And on my ecu ( 7A ) the VSS doesn't seem to influence performance .
>> Except for an occasional stall when I return home from a high speed
>> drive .
>>
>> Do you know what teh fuel consumption signal from an ecu ( 7A or 3B )
>> looks like ?
>> I have the fuel consumption gauge on my digidash not functioning causi
>> I rpalced the k-jetted engine
>> with a 7A . And I don't have the K-jet metering plate sensor anymore .
>> And I didn't dare connectiong
>> the ecu signal directly to the dash input . Any btdt on that one ?
>>
>> Pat
>> 1981 Ur-q 100% original , full option
>> 1981 Ur-q 3B and Six spd .
>> 1986 Coupe Quattro 7A and Six speed , daily driver .
>>
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