Scan Tool Diagnostics
The anti-theft alarm control module communicates with the Intelligent Saab Tester (ISAT) scan tool via pin 19. The communication is two-way and as such is both input and output signal.
The ISAT scan tool can communicate with the theft alarm when the ignition is in the "ON" position (+15), but communication normally takes place with the ignition "OFF".
Communication between the ISAT scan tool and the anti-theft alarm is not possible if the alarm is armed.