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Home >> Ford >> 2000 >> Contour SVT >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Manual A/C-Heater Systems >> Description & Operation >> Powertrain Control Module (Pcm)

Powertrain Control Module (Pcm)

PCM indirectly controls power to compressor clutch coil. When PCM receives an A/C request signal, it grounds coil circuit of A/C WOT relay. Contacts in A/C WOT relay close, allowing power to A/C compressor clutch.

PCM shuts off compressor clutch during engine starting, high engine speed, heavy acceleration, high engine coolant temperature, or low engine idle (about 200 RPM less than specification). PCM indirectly controls power to cooling fan motor(s) through low-speed and high-speed cooling fan relays

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