NEED HELP Secondary air injection valve pin out
- Thread starter MPB
- Start date
Mooseman
Moderator
Did you check in the manuals, either mine (link in my signature) or at https://charm.li/ ? I know that @mrrsm has some pinouts too.
I looked in charm and the Chilton manual at McDowell County library, Couldn’t even find anything on the valve itself let alone the pin out.
Blckshdw
Moderator
Exported the attached from GMSI. Scroll down to pages 22 and 23 
Maybe this??
Air Injection Vacuum Control Solenoid Valve: Diagrams — 2006 Chevrolet TrailBlazer 4WD L6-4.2L VIN S Service Manual | Operation CHARM
Detailed repair manual for the 2006 Chevrolet TrailBlazer 4WD L6-4.2L VIN S.
charm.li
And like 10 or 11 sketches down here..
Electrical Diagrams — 2006 Chevrolet TrailBlazer 4WD L6-4.2L VIN S Service Manual | Operation CHARM
Detailed repair manual for the 2006 Chevrolet TrailBlazer 4WD L6-4.2L VIN S.
charm.li
Yeah you’re right, I use it quite often and pretty much find what I’m looking for, once in a while not so much, guess I was looking under the wrong sub category.
As far as this valve I think it’s toast, unless I’m testing it wrong, I’m grounding pin 4 and supplying power to pin 6, all I’m getting is a clicking sound like it’s seized?
You’re right, thought I’d at least see that piston and shaft go up or down or something
Attachments
BUT... how do you know what you are doing by providing just a "supply voltage" and ground.... why would they put a "control" line in the connector if all you need was the first two...
BUT... how do you know what you are doing by providing just a "supply voltage" and ground.... why would they put a "control" line in the connector if all you need was the first two...
There seems to be some ambiguity at least in my mind as to the function of that "control" connection.
This portion of the diagram shows what appears to be an OUTPUT to that "control" rather than an input ?? I cannot see what an input control would be connected to a 5 volt reference and a low reference. These sorts of circuits are generally outputs.
It looks to me like that control is an output indicating the position of the valve??
OK... but how do you know that anything has not happened IF you are only putting a voltage on AND listening... what are you looking for? Isn't that what a reading of the control line will "tell" you. Of course, I have never seen one of these in operation... so I don't know what you physically look at to determine its operation.
Same here, never seen one and don't have one to look at.
Looking at the OPs photos I would speculate that thin shaft should move longitudinally when the solenoid is energized.