An immobilizer cuts power to the starter, or the ignition and in most cases the fuel supply.
The immobilizer can only be deactivated by transponder which sends a signal to the immobilizer
unit and allows the vehicle to start. The immobilizer controls electricity in your vehicle’s fuel system,
started and ignition. The transponder in your key signals the immobilizer to activate them.
In some immobilizers, the transponder is imbedded right in the key. In other ones,
it is located in a fob that hangs from your keychain.
Without the transponder immobilizer would not allow power to flow to the starter, fuel supply and ignition.
If someone tries to steal your car, it would not start.
The immobilizers are the best protection against vehicle theft.
You can hear that some vehicles with factory installed and after market immobilizers are being stolen.
That is because some immobilizers do not meet all requirements of the ULC S338 Canadian standard.
This kind of an immobilizers may only disable two systems in a vehicle, or may not use a transponder based security system.
Immobilizers disable three vehicle systems, use transponder technology,
and can withstand prolonged attacks. When installed according to national standards,
these immobilizers can not been defeated by auto thieves.