- engine speed;
- throttle setting;
- signal from the air pressure sensor;
- battery voltage;
- signal from the air temperature sensor;
- signal from the knock sensor;
- coolant temperature;
- position of the throttle valve adjuster;
- signal from the lambda probe;
- additional signals.
During the first phase of starting the engine, the injectors are controlled simultaneously, after starting, a sequence occurs.
The fuel pump relay is located in the relay and fuse box. From this relay, power is supplied to the injectors, the fuel pump and to heat the lambda probe. 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 approximately 1.6 seconds to generate the required fuel pressure. If the control unit did not receive a signal from the speed sensor, which means that the engine was not started, the relay will open the circuit. 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.