The injection system control unit and the air conditioning control unit are functionally connected to each other.
On signal «AC OUT» A signal is sent from the injection system control unit to the air conditioning system control unit to allow or prohibit the start of the air conditioning compressor.
On signal «AC ON» The air conditioning control unit requests permission from the injection control unit to control the air conditioning compressor.
When the air conditioner is turned on, the engine idle speed increases from 800 min-1 to a maximum value of 875 min-1.
In some engine operating modes, the injection system control unit prohibits the operation of the air conditioning compressor.
The air conditioning compressor operation is prohibited when the engine is started for 5 seconds.
If there is a significant change in the position of the accelerator pedal, when the engine speed is less than 3000 min-1 and the vehicle speed is less than 110 km/h, the compressor is turned off for 5 seconds.
If the accelerator pedal potentiometer position is greater than 50%, the engine speed is less than 2250 min-1 and the vehicle speed is less than 20 km/h, the compressor is turned off for 5 seconds.
If the position corresponding to the released accelerator pedal is not recognized and the engine speed is less than 675 min-1, the compressor is turned off. It turns on after 5 seconds if the engine speed increases.
The air conditioning compressor does not turn on if the coolant temperature is more than 112°C.
The compressor switches on after switching off at 110°C. The coolant temperature indicator light comes on at a temperature of 120°C and goes out at 115°C.