Mazda CT-L1005, Руководство по обучению

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A/C System Basic Climate Control
•
Once the driver activates the A/C, the climate control unit sends a signal to the PCM. If
the pressure in the system is neither too low nor too high, the PCM in turn energizes the
A/C relay that supplies power to the magnetic clutch.
•
The PCM uses a variety of signals to determine if the compressor should be turned on.
For example under certain operating conditions such as high engine load, high coolant
temperature or high engine speed the PCM will not turn the compressor on.
•
The magnetic clutch is equipped with a thermal protector switch to protect the
compressor against excessive temperature. If the temperature of the compressor
becomes too high, the switch opens and the magnetic clutch is de-energized.
Wiring Diagram
L1005_049
1 PCM 4 A/C relay
2 Thermal protector switch 5 Medium-pressure switch
3 Magnetic clutch 6 Low-/High-pressure switch
03-22 Curriculum Training