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Re: ISV circuit
In message <email@example.com> Phil Rose writes:
> >As a general rule - if you break into an ISV circuit you _MUST_ switch
> >the engine off and on again before making any measurements. Most Audi
> >(VDO) ISV controllers go on permanent strike if they see an open
> >circuit to the ISV itself. This situation can _ONLY_ be remedied by
> >ignition cycling.
> One exception appears to be the '91 200q (an exception to lots of things
> except frequency-of-repair statistics). Pulling the plug on the ISV buggers
> the idle speed but plugging it in again brings the idle right back to spec.
> No ignition recycling needed.
Yes - Motronic 2.4 - same applies to the ur-quattro 20V.
UK Audi quattro Owners Club
Phone: 0385 302803 Fax: 0870 0883933