Quote:
Originally Posted by Rversteeg
I am not quite sure that this is correct. The AC compressor clutch is fed in series with a low pressure switch and a high pressure switch. The ECU only gets a signal that the AC is engaged to prepare the idle speed control system for the additional load. It also does something to the cooling fan control,
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Spot on - the engine ECU only has an INPUT from the ECC/MCC, it does not have an OUTPUT to the MCC/ECC.