Idle stabilization control unit pinout?
antti.piirainen at iki.fi
Tue Jan 27 16:29:35 EST 2004
a4kcstq at comcast.net wrote:
> You've got them correct so far. I've added some info below. This is reading from the '86 5kqt diagram out of Bentley.
I spent tonight measuring and testing the different ISV circuits, and
meanwhile learned a lot from the control unit's operation. The problem,
by the way, was a dislocated spring in the ISV itself, causing it to
open wide at the threshold voltage (which apparently was around 1,6
volts), when it should have not.
> I'm not sure about your control unit. I thought they used 2 relay sockets, not 3.
Physically it does. However it's three units wide, and while actually
connecting to relay plates 8 and 9 in my car, it takes up the space for
the non-existing plate 7 on the relay map, thus marked "7-9".
> What type of car is it from?
An '87 Coupe quattro with a naturally aspirated KV engine, ie. CIS,
vacuum controlled advance, no cat and no lambda. Thus, no ECU.
More information about the quattro