Electronic control module: Notes
The control module is integrated into the SID unit. The SID unit has a 22-pin connector. The control module receives information from its own sensors and switches as well as from other systems.
The information is processed and used to activate the horn, control the instrument and display lighting, display CHECK messages and calculate trip computer functions. SID sends certain information to the bus.
The SID unit is supplied with +30 and is adapted for voltages of between 9 and 16 V when driving. When the ignition is ON, the control module is activated and the display lights up. Text from systems connected to the bus can still be presented on the SID unit's display even when the ignition is OFF.
The SID unit is active in the following situations:
- With the ignition in the +15 position, all functions of the SID unit will be turned on except timer programming for the parking heater (accessory).
- With the ignition OFF, the SID unit is turned on by information on the bus as follows:
- Remains on for 20 minutes if turned on by DICE.
- Kept active by audio system to show settings on the display.
- Can communicate with Tech 2 if the SID unit is turned on via the bus.
- The timer for the parking heater can be programmed and started.
- With the ignition OFF, the parking heater and clock can still be activated and the anti-theft alarm sensors disabled.
If a fault occurs, the control module stores the diagnostic trouble codes. When the SID unit is replaced, it must be ordered for the car concerned and programmed by Saab Automobile.
When handling the control module, it is important to ground yourself first by touching the car body, for example. Avoid touching the pins in the SID unit connector.