need help in electrical measurements(ISV)

[Richard J Lebens]

Does your meter have separate fuzes for the different ranges and are
they ok?

--- Konstantin Bogach <kbogach at comcast.net> wrote:
> I forgot to mention that I tried to do it on a cold engine rather
> then 80C
> as recommended.  It is not that I forgot about it  but just tried to
> measure
> the current first on a cold engine.  Just curiosity.  Does it help to
> find
> explanation for 0L. reading?
>
> Thanks.
>
> Konstantin.
>
>
> Konstantin Bogach wrote:
>
> > Hi listers.
> >
> > Lately 200 '89 MC1started to  idle rough.  I tried to check IS
> system
> > using SJM's instructions.  What I can not understand is why ISV
> buzzes
> > only if I use mA range on DMM?  If I use A or microA it does not
> buzz
> > and DMM shows nothing (.002 as with open circuit).
> > Another question:
> > When I use mA range ISV buzzes and DMM shows 0L. which I interpret
> as
> > infinity.
> > SJM covers 0 reading but does not cover infinity reading.  I am
> pretty
> > weak in electronics.  Can someone help to interpret this reading?
> ISV
> > control unit outputs high current beyond mA range can show?  Why
> can't I
> > measure it in A range?
> > Temp sensor is fine.
> >
> > Thanks a lot.
> >
> > Konstantin Bogach.
>

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