ASV schematics/pinout

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Eliminateur

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Does anyone with ELSA access has the electrical diagram for the ASV valve?, the 4 pin one

Also, what are the expected I/O signals?

aaaand i know this is probably impossible, but the schematics for the control circuitry inside the ASV would be a plus
 
many thanks, i've found the wiring schematics ( Autotecnic2000.com )
but i don't know HOW is it controlled, what kind of signal is sent to/from the ASV unit
 
Pin 1 is -/ground
Pin 2 is +/12v
Pin 3 and 4 is analoug signal for directional and opening/closing level. Probably +/-5v regulating like a servo.

Not 100% sure thou.
What does this valve do?

God luck
 
but which one of 3 and 4 is input and output?, both of them can't be inputs has a simple PWM input can be used to set the desired opening level in %
the ASV it has 2 functions: antishudder on stop (and preventing a engine runaway as well if it's happening) and modulating the air intake ammount to optimize EGR "suction" (i.e.: closes the air intake so the engine sucks more EGR gases)

engine is perfectly "functional" without it(other than the CEL light turning on and violent shudder on shutdown) and it's quite an expensive ****** so i want to fix it myself
 
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