What is the use of fuel injector What is the use of fuel pump Do all Toyota corolla 2000 have fuel injector?

Yes, all 2000 Toyotas have fuel injectors.

Backwards from the point of explosion:

The fuel injector sprays the gas into the cylinder where it is ignited.

The fuel rail delivers the gas to the fuel injector.

The fuel pump moves gas from the tank into the fuel line, and to the fuel rail on the engine.

Per the fuelinjectorwhse.com lookup system, there is only one for all models.

Year: 2000Make: TOYOTAModel: COROLLAEngine: 1.8L - L4Fuel Injector Part Number: 1432903Fuel Type: GASPart Prefix: FI

URL for associated part lookup:

http://www.fuelinjectorwhse.com/carinjectors.php?make=Toyota&model=COROLLA&mn=833