Security Functions

Security Functions

In addition to monitoring the door, trunk and hood switches, and the intrusion sensing system, the security system supplies a number of ether features.

Passive arming (automatic arming)
The security system will automatically arm if the vehicle is left with the ignition off, the doors, trunk and hood closed for more than 30 seconds. The doors will not lock when the system passively arms. To disarm a passively armed vehicle requires that the transmitter be pressed or the ignition switched on. Passive arming is a dealer-programmable convenience feature.

Alarms and warning tones
The system provides several warnings and alarms:

ERROR TONE The error tone is a high pitched tone emitted when the transmitter is pressed to arm the system while one or more of the following conditions exist:
^ a door or doors are open: the trunk is open; the hood is open
^ the ignition is on
^ the driver's door has not been closed since the ignition was switched off.

DOOR UNLOCK WARNING The door unlock warning is a repeated chirping tone emitted if a door is unlocked using the key after the system has been actively armed, or if the central locking fails.

ESCALATING RESPONSE An alarm tone that gradually gets louder over its seven-second duration is the second warning that the system is actively armed and a door is opening. If the system is not disarmed during this seven second period, the system will activate the full alarm.

AUDIBLE TICKING A ticking tone that has a 15 second duration is the equivalent to the escalating response when the system has been passively armed. If the system is not disarmed during this 15 second period, the system will activate the full alarm.

FULL ALARM The full alarm is the combined audible and visual alarm.

Emergency disarm
If the transmitter is inoperative or is lost, the system can be disarmed by cycling the ignition switch ON/OFF three or more times within 15 seconds of a door being opened.

Alarm restart
If, while the system is armed, the battery is disconnected during or after a full alarm, the system will automatically rearm (shutting down the CPU) and reinstate the full alarm when the battery is reconnected. The system then must be disarmed using either the transmitter or the emergency disarm procedure. This feature prevents defeat of the system by disconnection of the battery.

Anti-scan
If the system receives more than 10 different RF transmissions within a short period of time (approximately one minute, the security system will not disarm for approximately one hour. This feature prevents defeat of the system by thieves employing frequency scan.

Quiescent current shutdown
If the security system remains armed for an extended period, the system will initiate a two-phase shutdown to reduce quiescent current and extend the life of the battery. After 72 hours, the ECU will switch off the intrusion sensing system. After 28 days, the ECU will switch off the RF receiver. The vehicle must then be unlocked manually. When the driver returns to the vehicle, the manual unlocking of the vehicle will cause the RF receiver to be reinstated and allow the system to be disarmed using the transmitter.