Immobilizer Description And Operation: Notes

The immobilizer system functions are provided by the body control module (BCM). When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the immobilizer antenna amplifier surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the immobilizer antenna amplifier and then sent to the BCM.

The components of the immobilizer system are as follows:

• Immobilizer antenna amplifier
• BCM
• Ignition key (Transponder)
• Security indicator