Component Operation

Cylinder, Tamper And Door Jamb Switches:

SYSTEM COMPONENTS


Controller


The heart of the system is the solid state electronic controller. The controller contains the electronic components and power relays to operate the system.

Door Jamb Tamper Switches:

Door Jamb Switches

As stated before, the system operates in two stages:
the system must first be armed before the alarm can be activated. The theft deterrent system uses door jamb or tamper switches to activate the alarm. Each of the doors uses a two-terminal door jamb switch, which activates the alarm when the system is armed and any door is opened. One terminal is for the operation of the dome and courtesy lights, and the other connects to the controller to activate the alarm. Since one terminal of the switch on the driver's door also operates the key warning alarm, a diode is used to separate the circuits.

Loose, corroded, or poorly adjusted jamb switches can cause the system to activate intermittently. Check jamb switches for corrosion and replace as necessary. Check and adjust the switches to ensure that they remain in the OFF position when the car doors are fully closed. Door jamb switches can be adjusted by turning the adjustment nut located at the base of switch. With either lock cylinder or jamb switches, check ground wires for corrosion and repair or replace as necessary.

Cylinder Tamper Switches - Typical:

Lock Cylinder Tamper Switches

The driver and passenger doors and the trunk lid are equipped with cylinder tamper switches which are activated by movement of the lock cylinders. Rotation of a cylinder, or the in-and-out movement that would be caused by forced entry, will activate the lock cylinder tamper switches.

Mechanical and corrosion factors on both types of tamper switches can cause the system to activate intermittently. If this happens, check the lock cylinders for looseness. Any movement of cylinders equipped with tamper switches could cause the switch to activate the alarm. One possible cause for this problem may be a retainer that does not lock firmly to the cylinder. To correct this problem, reinstall the retainer or replace it with a new one.

Door Lock Cylinder Tamper Switches - Typical:

Lock Cylinder Switch

The front door lock cylinders are equipped with switches to disarm the theft deterrent system. When the lock cylinder is turned to unlock the door, the switch grounds the disarm input to the controller.