04-27-2018, 07:21 AM
Thanks for the link popgun, looks pristene inside that throttle body.
That is something i had not considered doc, current sensing.
I think that can be simulated by holding the shaft and see if it the ecm stops prematurely on over current.
Something else that crossed my mind is; what would happen if two of the wires are reversed somehow?
remember some tail lights have the green and pink/blue wires the wrong way.
It may be a good idea to check the color of the wires in the 4 pole iacv connector and at the ecm if they are the right way around.
on the ecm;
black/yellow---a6----iacv1a
black/orange--a7----iacv2a
black/blue------a16--iacv1b
black/red--------a17--iacv2b
and on the iacv connector in the following order;
black/yellow
black/red
black/blue
black/orange
You can see that the inside pair is coil b and outside pair is coil a on the iacv.
It may well be that one side of the coils is connected to dc volts or ground and can be measured with a voltmeter for correct polarity at the disconnected iacv connector ( at any time ).
link for wiring diagram http://cb1100forum.com/forum/showthread....#pid199015 and click on " here " at bottom of post.
Dave may know how much torque is produced by the stepper motor and if the shaft can rotate freely or is held in place if not energized?
If it was me i would not apply grease on the piston, dust may stick to it over time and probably too much friction inside the barrel when cold.
as far as i can tell it only makes contact in the groove of the piston so maybe a tiny amount of oil inside that groove only, remember it gets hot in there and any excess would run off, collect at the bottom of the barrel and just sit there collecting filtered dust.
And thanks for the check of the piston material Dave, when the iacv initialises does it move the piston away from the stepper motor ( out ) and then reverse toward it or the other way round?
At the end of the day Dave will have the only faulty iacv in captivity in the world.
That is something i had not considered doc, current sensing.
I think that can be simulated by holding the shaft and see if it the ecm stops prematurely on over current.
Something else that crossed my mind is; what would happen if two of the wires are reversed somehow?
remember some tail lights have the green and pink/blue wires the wrong way.
It may be a good idea to check the color of the wires in the 4 pole iacv connector and at the ecm if they are the right way around.
on the ecm;
black/yellow---a6----iacv1a
black/orange--a7----iacv2a
black/blue------a16--iacv1b
black/red--------a17--iacv2b
and on the iacv connector in the following order;
black/yellow
black/red
black/blue
black/orange
You can see that the inside pair is coil b and outside pair is coil a on the iacv.
It may well be that one side of the coils is connected to dc volts or ground and can be measured with a voltmeter for correct polarity at the disconnected iacv connector ( at any time ).
link for wiring diagram http://cb1100forum.com/forum/showthread....#pid199015 and click on " here " at bottom of post.
Dave may know how much torque is produced by the stepper motor and if the shaft can rotate freely or is held in place if not energized?
If it was me i would not apply grease on the piston, dust may stick to it over time and probably too much friction inside the barrel when cold.
as far as i can tell it only makes contact in the groove of the piston so maybe a tiny amount of oil inside that groove only, remember it gets hot in there and any excess would run off, collect at the bottom of the barrel and just sit there collecting filtered dust.
And thanks for the check of the piston material Dave, when the iacv initialises does it move the piston away from the stepper motor ( out ) and then reverse toward it or the other way round?
At the end of the day Dave will have the only faulty iacv in captivity in the world.