How does an immobilizer function on a Renault truck?

An immobilizer on a Renault truck functions as a security system that prevents the engine from starting without the correct key or fob. It uses an electronic chip embedded in the key, which communicates with the vehicle's onboard computer. If the signal from the key is not recognized, the immobilizer disables critical components, such as the fuel pump or ignition system, effectively preventing the vehicle from being stolen. This system enhances vehicle security by ensuring that only authorized users can operate the truck.