Idle speed control valve

[zpiloto]

Originally Posted by ELF

My car will not run with the wire disconected, It will run if I keep pushing on the throttle but soon as I let up the engine dies.

If it's a motor and not a solenoid you need to disconnet with the engine running at the idle speed you want it to be at. If you disconnet with the engine off you'll get those results.

[cfg83]

skewbe-

Originally Posted by skewbe

typo, impirical evidence and physical examinations shared here all point to it being a motor, and a rather goofy one at that.

I think we're both right. This is from the "Identifying Wiring Diagram Symbols" table in my electronic Saturn manual :



This is a picture of what the idle control valve is from an electrical standpoint :



What the image above implies to me is two solenoids controlling a motor. The blue wires control the "A" solenoid and the green wires control the "B" solenoid.

Hypothesis : If we knew the amount of volts/amps to send thru the green or blue wires at any one time, we could take FULL independent control of the Saturn idle air control valve .

Does this make sense ?

CarloSW2

[skewbe]

Quick Quiz

Is this (assuming it works and is turning) a solenoid or a motor?




P.S. Yes, it is quite possible to put a manual control on the idle speeed motor, look at what voltages the computer is sending on what wires for a starting point.

[jwxr7]

Is this (assuming it works and is turning) a solenoid or a motor?

I would call that a solenoid. It just has a linear to rotary converter on the end, but a solenoid at heart.

This is a picture of what the idle control valve is from an electrical standpoint :

That looks like a step motor symbol to me. A 2 phase stepper to be exact, thats why there are two winding sets with iron bars in the symbol. A step motor is well suited to that kind of positioning job. Kind of like the ones in computer printers.

[cfg83]

jwxr7 -

Originally Posted by jwxr7

I would call that a solenoid. It just has a linear to rotary converter on the end, but a solenoid at heart.

That looks like a step motor symbol to me. A 2 phase stepper to be exact, thats why there are two winding sets with iron bars in the symbol. Kind of like the ones in computer printers.

So it probably is a stepper motor after all. That makes sense to me, since it "sits in place" when the juice is off. Other people said it needs more than 4 (5?) wires to be a stepper motor.

CarloSW2

[jwxr7]

Other people said it needs more than 4 (5?) wires to be a stepper motor.

Not necessarily, most of the ones I deal with only have four wires because they are two phase . there are some with three or more phases, which would require more wires .

[cfg83]

skewbe -

Originally Posted by skewbe

Quick Quiz

Is this (assuming it works and is turning) a solenoid or a motor?




P.S. Yes, it is quite possible to put a manual control on the idle speeed motor, look at what voltages the computer is sending on what wires for a starting point.

Where does the hamster fit in? How can it turn without a hamster spinning the wheel? Is the wheel the multiple ovals above the "-" sign?

CarloSW2

[skewbe]

Originally Posted by jwxr7

I would call that a solenoid. It just has a linear to rotary converter on the end, but a solenoid at heart....

ok then, what is this device, motor or solenoid?

[diamondlarry]

Originally Posted by skewbe

ok then, what is this device, motor or solenoid?

I'll probably post this somewhere else but, I just picked up a complete set of Saturn factory service manuals. I'll see what they call the Saturn part in there.

[diamondlarry]

Below is a quote from the service manual:

The PCM controls a two-coil stepper motor which controls the bypass air intake into the throttle body to decrease or increase engine idle speed.