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tips, technology, tools and techniques related to vehicle driveline components

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en
ian jenkins
Mississauga Ont canada
(67 posts)

Registered:
12/27/2010 11:06AM

Main British Car:
77 tr7

Rover 14cux idle bypass valve
Posted by: en
Date: October 06, 2011 10:50PM

I believe i understand the theory of the stepper valve that controls the by pass air valve.
But how does it work?
Appears to have two windings. Is one an open, the other a close winding?
Or does the ECU reverse polarity to drive the valve open and closed?
I ask because i have tried two used valves and neither seem to react to voltage input from ECU.
I'd like to know if ECU is sending correct signal to valve
Thank you
ian


pcmenten
Paul Menten

(242 posts)

Registered:
10/08/2009 10:40AM

Main British Car:
Re: Rover 14cux idle bypass valve
Posted by: pcmenten
Date: October 07, 2011 07:01PM

Stepper? Is is a rotary actuator? A stepper motor moves one 'step' at a time, in discrete steps measured in degrees of rotation. For example, a step might be 2 degrees or 4 degrees of rotation. That would require two windings and at least four wires.


en
ian jenkins
Mississauga Ont canada
(67 posts)

Registered:
12/27/2010 11:06AM

Main British Car:
77 tr7

Re: Rover 14cux idle bypass valve
Posted by: en
Date: October 07, 2011 11:02PM

i've heard it refered to as a stepper motor. It does
have 4 wires
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