Quote:
Originally Posted by pacecarta
D2 is for low speed fan control , its not power, its only a ground for the low speed fan relay ,
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That was the OP's original question, "fan control".
Quote:
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the A/C pin at ecm is for 12v in, its for telling the ecm that a/c is requested to be on so it can adjust the base idle rpm
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You're refering to pin B8.
I knew that, that's why I didn't direct him to pin B8.
But thanks for posting the schematic, that'll make his search much easier.
Quote:
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the high speed fan is turned on with a/c but its done via a pressure switch on the pressure line behind the a/c compressor , if A/C sytem is on and operational ( charged) the high speed fan is engaged
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