Theft alarm system – circuit operation

THEFT ALARM SYSTEM – CIRCUIT OPERATION

Perimetric Protection

The system is perimetrically armed whenever the vehicle is manually central door locked using the driver’s door key. A lock request from the handset will volumetrically arm the theft alarm.

Volumetric Protection

Using the handset transmitter will turn On and Off volumetric protection. In volumetric mode all doors, tailgate, and bonnet are protected against unauthorised entry, and the Ignition Switch is protected from being switched on. In addition, the vehicle interior is protected using the Alarm Sensor (X213).

Theft Alarm Disarming (Perimetric and Volumetric Modes)

The theft alarm can only be disarmed with the handset (or EKA code). NOTE: The theft alarm system cannot be disarmed using the driver’s door key.

Partially Armed Mode

The system will enter the “partially armed” mode whenever one of the following conditions is valid during theft alarm arming: movement takes place inside the vehicle within
15 seconds of the lock signal being received a door, tailgate, or bonnet is open.
The engine will be immobilised and cranking is inhibited. The alarm will sound if ignition is turned to start position. The alarm will protect the following: If any of the doors caused partial arming, then
opening the tailgate or bonnet will sound the alarm. If the tailgate caused partial arming, then the
opening of any doors or the bonnet will sound the alarm. If the bonnet caused partial arming, then the
opening of any doors or tailgate will sound the alarm. Volumetric protection is also armed. If two of the above cause partial arming, then the
third is still protected. If the doors, tailgate or bonnet is subsequently closed, after a 5 second delay, the system will fully arm.

Engine Cranking

It is only possible to crank the engine when ignition is ON and alarm disabled.

Alarm Sounder

When an intrusion is detected, the Alarm Sounder (Z171) will sound and the hazard lamps flash (where territorial regulations allow) for 30 seconds. The alarm must be retriggered before the Alarm Sounder will sound again. Two different types of Alarm Sounders are available: 1. Normal Alarm Klaxon (Alarm Sounder (Z171)) 2. Battery Backed Up Alarm Sounder (Z272) The Battery Backed Up Alarm Sounder (Z272) is an alarm sounder which contains its own internal battery. When the Ignition is on, the internal battery is charged via an Ignition feed. If either the connector is removed or the wires to it are cut, then the sounder will sound for 3 minutes. To disconnect the Battery Backed Up Alarm Sounder (Z272): Turn Ignition On (Pos. II)
Turn Ignition Off
Disconnect within 15 seconds
To silence if triggered: Connect
Disarm Alarm
Turn Ignition On (Pos. II)