Control of climatic installation is exercised by several EBU.

As EBU of system of injection enters:

– management of refrigerating capacity on the basis of inquiries from salon and value of pressure in a contour;

– definition by the consumed power conditioner compressor proceeding from value of pressure in a contour;

– delivery of permissions to control of the engine cooling system electric fan depending on the speed of the car and pressure in a contour;

– delivery of permission and prohibition on turning on of the compressor.

At turning on of the conditioner, the control panel of climatic installation requests permission to turning on of the compressor of the conditioner.

EBU of system of injection resolves or does not resolve:

– operation of the compressor of the conditioner;

– operation of the electric fan of the cooling system of the engine;

– transition of the engine to idling.

The operating commands for turning on of the electric fan of the cooling system of the engine and the compressor arrive from EBU of system of injection on multiplex network. Teams are developed on the basis of information on work of climatic installation, and also taking into account temperature of cooling liquid and speed of the car.

Supply voltage moves on the electric fan and the compressor from the block of protection and switching.

Information used by EBU of climatic installation is transferred on multiplex network:

– contact 4 AA – the line of multiplex network "CAN HIGH";

– contact 3 AA – the line of multiplex network "CAN LOW".

EBU of system of injection obtains information from the coolant pressure sensor on contacts:

– in J3 a coolant pressure sensor signal;

– in J2 "+" of power supply of 5 V of the sensor of pressure of coolant;

– in K2 "mass" of the sensor of pressure of coolant.