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Re: MC ECU codes in 4kq/Ur-q.
Take the yellow wire out of the harness from the ECU. Splice in a wire and
connect it to a momentary switch. With the cold side of the switch run it
to a seatbelt warning light socket. Put the socket in the check engine
blank in the instrement cluster. Then ground the other side. What you will
do to check codes is simply push the momentary switch for 5 seconds. That
will trigger the ECU to send the codes to the light.
86 4000csq turbo, 2 1/2 cat back, H&R-Boge, MC and loving it. Drilled and
stopping it. Koenig Cobra 16x7 with Yokohama A520's turning it, K&N and
84 4000sq AKA: The beater.
95 subaru legacy
> Just wondering, for all of people who have swapped MC engines into
> 4kq/Urq how do you read codes.
> I know that you need to supply the yellow wire 4 seconds of 12+ but then
> which output (12+ or ground) do you use with the LED?
> Scott M's excellent site does not cover the converted cars.
> Martin Pajak
> 1983 Audi Ur-quattro (225,000 km)
> 1986 Audi 4000 S Quattro (415,000 km) with 5 bolt pattern