Control module: Diagnostics
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.
The control module monitors its own internal functions as well as the components of the TC/ABS system.
If an internal fault occurs in the control module, diagnostic trouble code C1605 will be set, the TCS and ABS functions will be disabled, and the warning lamps for ABS, brakes, and TCS OFF will light up as well as the central warning lamp.