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rules of duty
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Description: some DC voltmeters can work but about 1/2 do not;.
connected directly to ISC 2 pins.(back probed.
but the FSM shows, connecting the he DLC
ok sure,, but, facts are :
that meter in the book is not sold. anywhere.
the suzuki meter is a current sourcing meter (crazy idea sure)
worse yet, some ECU have no drive signal there.
its just and open drain(collector) transistor,
, but what does work most the time, (every)
is a DMM with a knob that states DUTY.
and connected directly tot he ISC works,

the 1996+ cars in USA do source current for duty on the DLC
and all voltmeters work , as the FSM stated.
but not earlier.



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Posted by: fixkick 03-20-2016


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