Direction Indicators
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.
When the direction indicators are activated, DICE sends a message to SID to produce an acoustic signal and to MIU (main instrument unit) to display a lamp signal. The flashing frequency is 90 flashes per second. When a lamp has failed the flashing frequency is doubled to 180 flashes per second.