E40 PCM ac wiring help.
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TECH Fanatic
Joined: May 2010
Posts: 1,081
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From: Atlanta, Ga
E40 PCM ac wiring help. The plan is to trigger the PCM when the AC is switched on to step up the idle and activate the fan.
I see 3 pins in the blue connector referenced.
Pin 26 = A/C pressure signal
Pin 30 = A/C pressure +5
Pin 55 = A/C pressure signal
I have 2 terminals on the pressure switch, #1 12v in, #2 12 v to compressor. I understand that I need to use the #2 terminal for the signal. To which PCM pin do I connect?
My guess is not Pin 30, what do Pin 26 and Pin 55 control?
I see 3 pins in the blue connector referenced.
Pin 26 = A/C pressure signal
Pin 30 = A/C pressure +5
Pin 55 = A/C pressure signal
I have 2 terminals on the pressure switch, #1 12v in, #2 12 v to compressor. I understand that I need to use the #2 terminal for the signal. To which PCM pin do I connect?
My guess is not Pin 30, what do Pin 26 and Pin 55 control?
The plan is to trigger the PCM when the AC is switched on to step up the idle and activate the fan.
I see 3 pins in the blue connector referenced.
Pin 26 = A/C pressure signal
Pin 30 = A/C pressure +5
Pin 55 = A/C pressure signal
I have 2 terminals on the pressure switch, #1 12v in, #2 12 v to compressor. I understand that I need to use the #2 terminal for the signal. To which PCM pin do I connect?
My guess is not Pin 30, what do Pin 26 and Pin 55 control?
I see 3 pins in the blue connector referenced.
Pin 26 = A/C pressure signal
Pin 30 = A/C pressure +5
Pin 55 = A/C pressure signal
I have 2 terminals on the pressure switch, #1 12v in, #2 12 v to compressor. I understand that I need to use the #2 terminal for the signal. To which PCM pin do I connect?
My guess is not Pin 30, what do Pin 26 and Pin 55 control?
