Immobilizer System Description
The vehicle is equipped with an immobilizer system that will disable the vehicle unless a programmed ignition key is used.
This system consists of a transponder located in the ignition key, an immobilizer-keyless control unit, an indicator, and the ECM/PCM.
When the key is inserted in the ignition switch and turned to the ON (II) position, the immobilizer-keyless control unit sends power to the transponder in the ignition key. The transponder then sends a coded signal back through the immobilizer control unit-receiver to the ECM/PCM. The code is a rolling type embedded in the receiver instead of the ECM/PCM.
A communication agreement with the HDS is required at the ECM/PCM after repair or replacement. When replacing the immobilizer-keyless control unit, all keys are required to be registered into the new control unit. Any keys that were not registered in the control unit will not start the vehicle.
If a programmed key has been used, the immobilizer indicator will come on for about 2 seconds, then go off.
When the ignition switch is turned to LOCK (0), the indicator will blink for about 5 seconds to signal that the unit has been set correctly, then the indicator will go off.
If the wrong key has been used whose code was not received or recognized by the unit, the indicator will come on for about 2 seconds, then it will blink until the ignition switch is turned to LOCK (0).