Is a PO1 PCM capable of controlling the fans through the pressure transducer? Setting is set for 254PSI but isn't turning on the fans.
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Is a PO1 PCM capable of controlling the fans through the pressure transducer? Setting is set for 254PSI but isn't turning on the fans.
Unless you added a transducer you have a pressure switch.
We have a transducer in the system.
Well no one knows what you did with it so good luck figuring it out.
Yes it can, and indeed does on F and Y bodies (I own an F-body, so I know first hand lol). It should be wired as such (diagram attached). What I do not know however, is whether the truck OS' (I am assuming that is what you are using??) can "see" the transducer by default.
Attachment 160489
I think you either need a late truck OS or a Car OS to do this.
Agreed. The early truck OS will not correctly run the dual efan setup. I generally use the 2002 O/S as it will run the e-fans correctly and has other changes like knock sensor changes that reduce the tendency to throw false knock.Quote:
Originally Posted by Alvin
Are you satisfying the pressure requirement?
Yes. High side reached 275.Quote:
Originally Posted by abc
Cobra30689. Thank you. I'll go back and check the year that this is. I've used them to control fans via temperature on the early ones but not by pressure.
Fast4.7, thank you.
Alvin, I have both, I'll try that.
Question I have a 2003 Tahoe that I just put E-fan on. I can command the fans to cut on with hptuners and they work normal but the don?t turn on with the A/C on or go into high speed. I'm using pins 42 in the blue connector and 33 in the green connector with a 3 relay harness off of Amazon. Did I miss something in the tune or do I need to do something else?
I'm not sure i've seen a ebay/amazon harness work out of the box.
Post the tune file so we can double check your work.