Ultrasonic Motion Sensor


If the "Alarm Fault" communication is displayed on the Message Center, the most possible cause is failure of the ultrasonic sensor module mounted on the headliner. This device monitors the inner of the automobile for intruders when the automobile is in the "superlocked" state. Alternate of the sensor is easy and, if you are lucky, will solve the problem. A Scientific Repair dispatch was issued on the subject, stating the problem is most commonly found on 1998 models. After this is a better version of the sensor was issued.


The most basic part in a car alarm method is the access alarm. When you open the front hood, trunk or any door on a fully protected car, the head triggers the alarm scheme. Mainly automobile alarm systems use the switching mechanism that is already built into the doors. Here recent cars, opening a door or trunk turns on the inside lights. The button that makes this work is like the system that controls the light in your refrigerator.

All you have to do to set up door sensors is add a new element to this pre-wired circuit. With the new wires in place, opening the door sends an electrical current to the brain in addition to the inside lights. When this current flows, it causes the mind to sound the alarm.

As an overall caring measure, new alarm systems naturally monitor the voltage in the car's entire electrical circuit. If there is a drop in power in this circuit, the brain knows that someone has interfered with the electrical system. Turning on a light, messing with electrical wires under the hood or removing an attached trailer with an electrical link would all cause such a drop in voltage.


Door sensors are extremely effective, but they offer rather limited safety. There are other ways to get into the car, and thieves don't actually need to break into your car to steal it from you. In the next pair of sections, we'll look at some of the higher car alarm systems that protect against craftier criminals.