[urq] 3B swap or 200 20VT - relay j49 - necessary?

[Martin Pajak]

Alex,

Never seen J49 in wiring diagram on the S2... what ECU pins are actually
connected to J49?  Can you see what it does (inputs/outputs).
Following might help.. no J49...

http://www.s2central.net/motronic_pinout_3B.html
http://www.s2central.net/images/wee_3B_overview.GIF

Let me know
Cheers

-- 
Martin Pajak

http://www.quattro.ca

1982 Audi Ur-quattro (50,000 mi) new project
1983 Audi Ur-quattro (85,000 mi) Concourse d'Elegance
1985 Audi Ur-quattro (212,000 km) Euro spec. import mit 3B :)
1987 Audi 4000s quattro (205,000 km) wintervagen mit 7A :)




> alexander stickler
> I am just about to fire up my UrQ after the 3B swap
> (finally - I said that 2 months ago).
>
> Questions:
>
> 1991 200 TQ wiring diagram lists an ECU power supply
> relay, 'J49.'  It seems to be fairly rare and the
> dealer wasn't quite sure what part it actually was -
> what he pulled up was $700.00! With the wiring
> diagram, there is a note that says it was not
> installed on all vehicles.
>
> 1. Does this mean that I can drive around merrily
> without it?
> 2. If it wasn't installed on all vehicles, what is its
> purpose?
> 3. Is the harness the same with and without?
>
> I drove the car to the shop that pulled the engine,
> trans, and harness for me, so I don't know if it was
> there or not.
>
> 4. Part number - anyone have one for this?
> 5. Is J49 a unique ID? - I googled 'J49 Audi relay'
> and got a hit for Audi A8L's Fuel Pump Relay 2.  Would
> this be the same part?
>
>
> Any comments would be greatly appreciated.
>
> Alex Stickler
>
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