INTRUDER SENSOR OPERATION [KEYLESS ENTRY SYSTEM]

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1.  When the theft-deterrent system is armed, the intruder sensor outputs ultrasonic waves in the passenger compartment. The intruder sensor detects phase differences in the ultrasonic waves (reflected waves) that are output and bounced off a target object.

2.  When a phase difference in reflected waves occurs by movement in the vehicle (intruder), the CPU calculates the level of phase difference.

3.  If the level of phase difference is higher than specified, the intruder sensor sends a detection signal to the theft-deterrent control module.

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