Alarm Siren

ALARM SIREN







The siren is located in the vehicle cowl on the driver's side of the vehicle. This location provides a secure position with loud acoustic output.

The siren contains electronic circuitry for producing the warning tone when the alarm is triggered. The siren also contains a rechargeable battery that is used to power the siren when the alarm is triggered.







The rechargeable battery will allow the siren to sound if it or the vehicle's battery is dis-connected. The siren battery is recharged, from the vehicle's battery when DWA is not in the armed state.

The siren has four wires connecting it to the system; KL 30, KL 31,

Signal STDWA (arm/disarm signal from GM), and Signal NG (activate siren output signal to the GM)

The arm/disarm output signal from the GM (STDWA) is provided to the Tilt sensor, FIS sensor and the siren simultaneously. The arm/disarm signal is a switched ground that signals the components of DWA armed/disarmed status.







The activate siren signal (NC) is high whether DWA is armed or disarmed. If a monitored input activates the alarm, the high signal to the siren is switched to a 50% duty cycle at the GM. The control circuitry in the siren activates the siren driver. If the DWA is armed and the battery is disconnected the siren recognizes the normally high "NC" signal as suddenly going low, the siren is also activated.

DWA ARMING/DISARMING
- The DWA is armed every time the vehicle is locked from the outside with the door lock cylinder or FZV key.
- The LED in the rear view mirror flashes as an acknowledgment along with the exterior lights and a momentary chirp from the siren.
- The GM monitors all required input signals for closed status (door closed, tailgate closed, etc.) The inputs must be in a closed status for a minimum of 3 seconds for the GM to include them as an activation component. If after 3 seconds any input signal not in the closed status is excluded (this is acknowledged by the DWA LED) preventing false alarm activation's.
- If the DWA is armed a second time within 10 seconds, the tilt sensor and interior protection sensor are also excluded as alarm activation components. This function is useful if the vehicle is transported on a train or flat bed truck to prevent false alarm activation's.
- While armed the tailgate can be opened with out the alarm being triggered as follows:
- If opened with the tailgate remote button via the FZV, the GM prevents the alarm from activating. (This feature is customizable under the Car Memory function).
- If opened with the key at the tailgate lock cylinder the tailgate key position switch signals the GM and in the same manner prevents the alarm from activating.

In either case, when the tailgate is returned to the closed position, it is no longer considered as an activation signal.

Panic Mode Operation: When the tailgate button is pressed and held, the GM is signaled to activate the siren for the Panic Mode. The panic mode will function with either an armed or disarmed DWA system.

EMERGENCY DISARMING
Emergency disarming occurs automatically if a key is used to turn the ignition switch on and the EWS III accepts it. The EWS III signals the GM to unlock the doors and deactivate the DWA.