Compressor
At low pressure, the A/C compressor is disengaged at 1.75 bar and engages at 2.0 bar. This is equivalent to an ambient temperature of 0°C.
At high pressure, the A/C compressor disengages at 28 bar and engages at 22 bar.
The radiator fan starts at low speed if the compressor is active and any one of the following is true
- ambient temperature is above 22°C
- car speed is below 38 km/h and A/C pressure is above 9 bar
The radiator fan starts at high speed if the compressor is active and the A/C pressure is above 18 bar.
The pressure sensor is connected to the DICE in the following way
| Pin 54 (DICE) | Ground, pressure sensor (620) A |
|---|---|
| Pin 38 (DICE) | +5 V power supply, pressure sensor (620) B |
| Pin 9 (DICE) | Sensor output, pressure sensor (620) C, 0.25-4.75 V |
A/C PRESSURE SENSOR SPECIFICATION