Automobile Engineering in ME
The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to

Enable the pump's fault diagnosis function to operate
Warm up and lubricate the pump
Pressurise the fuel system before the engine is started
Supplies a large amount of fuel and thereby creates a choke effect

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Automobile Engineering in ME
The main function of a master cylinder is to

Adjust the extent of brake pedal free play
Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
Boost the force applied to brake pedal
Convert brake pedal force into hydraulic pressure

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