Quote:
Originally Posted by sweetbmxrider
Did you try jumping the pressure sensor/switch?
I think its pin 43, not 34, for relay ground from pcm. And you don't have the ground signal, correct?
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You mean jump the 5 volt reference to the signal input to the ECM? I tested the 5VDC, ground continuity, and the output of the sensor. I put my meter on the output, and I put compressed air into the AC system and watched the output of the sensor rise, then when I jumped the relay and forced the compressor I could see the voltage rise again.
When I have the 12VDC on the request pin I do not have ground continuity on pin 43 for the relay.