Ignition System - BOSCH Hall Effect: Description
The Bosch Hall Effect electronic ignition system consists of a breakerless Hall Effect distributor, a Hall (ignition) control unit, ignition coil, ignition switch, and battery. The idle stabilizer replaces the distributor in sending signals to the ignition control unit when engine speeds fall below 940 RPM.
NOTE:
Saab models do not use an idle stabilizer.
The Hall Effect distributor has normal centrifugal and vacuum advance mechanisms. See Figure.