- engine speed;
- throttle adjustment;
- signal from air pressure sensor;
- battery voltage;
- signal from the air temperature sensor;
- signal from the knock sensor;
- coolant temperature;
- throttle position;
- signal from lambda probe;
- additional signals.
During the first phase of engine starting, the injectors are controlled simultaneously, after starting, a sequence occurs.
The fuel pump relay is located in the relay and fuse box. This relay supplies power to the injectors, fuel pump and lambda probe heater. The fuel pump relay is activated when the control unit is turned on. After the ignition is turned on, the relay closes the circuit for about 1.6 seconds to create the required fuel pressure. If the control unit has not received a signal from the speed sensor, which means that the engine has not been started, the relay circuit will open. Almost 1.5 seconds after the last ignition pulse or when the ignition is turned off, the relay opens immediately. This prevents the lack of fuel supply when the ignition is on and the engine is not running. If for some reason the relay cannot be turned on, the engine will not start.