"a" battery
"b" ignition switch
"c" on
"d" starting
"e" ignition system 1
"f" ignition system 2
"g" ignition controlled +
"h" locking
"j" computer; air conditioning compressor
"k" engine ECU
"l" air conditioning compressor relay
"m" magnetic clutch
"n" air conditioning compressor refrigerant temperature switch
"p" air conditioning compressor
"q" compressor relay control - heating/ventilation
"r" excited
"s" not excited
The engine ECU puts the power transistor under voltage following the entry of the air conditioning start signal coming from the air conditioning ECU (CAN communication)
The air conditioning compressor relay energises and activates the air conditioning compressor
When the vehicle is driving under high load conditions (fast acceleration) the engine management ECU cuts the relay of the air-conditioning compressor for a predetermined period
Cutting the load of the air-conditioning compressor for a predetermined period gives the maximum engine power