LED (Light Emitting Diode): Self-diagnosis
WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
Whenever the alarm is armed, a self-diagnosis is carried out during the delay time (10 seconds) while the LED is lit continuously. If a fault is found, a diagnostic trouble code (DTC) is stored in the control module and the LED does not flash. The other functions of the alarm are not affected.