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.
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If a programmed key has been used, the immobilizer indicator will come on for about 2 seconds, then go off.
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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.
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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).