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vol96

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Discussion starter · #1 ·
I have taken my ISC apart to see how it works. (Lots of engineering went into this small part.) While apart (just three small phillips screws hold the coil case to the plunger case), I turned the magnet shaft to fully extend the plunger. I then disconnected the pos battery terminal, put ignition key in and turned it to on position. Then connected the ISC plug to the ISC but did not have the ISC mounted to the TB. Now, by touching the pos cable to the battery I can watch the ISC operate.

What it did was retract smoothly until it was fully retracted, clicked a few times then stopped clicking and remained in the fully retracted position.

The entire travel from fully extended to fully retracted was 5mm. Each coil had resistance of 30ohms +_ .5ohms

Is that how its supposed to work? I did this several times with the same results.

PS - Its late, I'm tired.....I hope the above made sense.
 
Sounds about right, the ohm ratings are still within specs. It's also suppose to revert and retract. My guess would be that it retracts when the powers on then when the cars running it'll adjust like its suppose to.
 
Discussion starter · #3 ·
After thinking about it some more, I remember that when I had it apart, I turned the magnet by hand to get full extension and retraction and measured the travel. Then compared it to the travel when connected using the above procedure and the travel was the same.

I thought the ecu was supposed to position the plunger in the middle of the range on start up, as I have read in some posts. Or if the ecu does that when pin 1 of the diagnostic connection is grounded (which I didnt test).
 
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