Immobilizer System: Notes

WARNING: This page is about a different car, the 2004 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.

The immobilizer system consists of the ignition key, the key ring antenna, immobilizer-ECU, and the PCM. The ignition key has a built-in transponder. The key ring antenna is installed on the steering lock key cylinder. Only the registered ignition key permits the engine to start, therefore, the engine can never be started by means of a forged key or by connecting the ignition wiring directly. The system is significantly safe and reliable against theft. In addition, the driver has only to turn the ignition switch to the "ON" position to activate the immobilizer system. If the requirements for starting the engine are not satisfied, the engine will be immobilized. If a registered ignition key is lost, all your ignition keys need to be registered again using scan tool MB991958 (MUT-III Sub Assembly) to ensure security (Refer to HOW TO REGISTER ENCRYPTED CODE ). An additional ignition key can be registered as follows (only if no ignition keys are lost):

Using scan tool MB991958 (MUT-III Sub Assembly) (Refer to HOW TO REGISTER ENCRYPTED CODE ).
By operating two ignition keys that have been already registered (Refer to HOW TO REGISTER ENCRYPTED CODE ).