Grand Voyager L4-2.4L DOHC (1996)
A/C Signal: Description and Operation
PURPOSE
Powertrain Control Module (PCM) monitors engine load and A/C system pressure, and cycles the A/C compressor clutch accordingly.
CONDITIONS
A/C or Defrost switch ON.
Combination valve, A/C low pressure and high pressure switches are closed.
OPERATION
Powertrain Control Module (PCM) receives an A/C selected signal.
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PCM engages A/C compressor clutch (by grounding clutch relay).
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PCM cycles compressor clutch depending on engine load and A/C system pressure.
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PCM maintains correct engine idle speed, through the Idle Air Control (IAC) Motor.
