Electro-hydraulic system
The position the soft top is in is detected by sensors integrated in the hydraulic system, soft top mechanism and windscreen frame. Information from each sensor is received by the STC. The soft top is controlled sequentially, which means that each soft top movement must be completed before the next one can start.
The soft top opens in the following steps:
- Sixth bow opens
- The first bow is unlocked and the soft top cover opens
- Sixth bow lowered
- Soft top lowered
- Soft top cover latches
Soft top closes in reverse order.
STC, which controls the pump and the valves, must receive confirmation of the different movements from sensors and switches within a certain time period. When one such condition is not fulfilled, all movement will cease and STC will generate an error message sent via the bus and shown on SID (Saab Information Display), e.g. "CHECK SOFT TOP".
STC also used bus messages from other control modules. If the information does not correspond to default values, STC will no allow the soft top to be operated. STC then sends an error message on the bus that is shown on SID (Saab Information Display), e.g. "Battery voltage too low".
The automatic soft top operation is carried out sequentially and is described in the following tables. The movements will be carried out after pressing the soft top button. Soft top movement is controlled by the STC control module (Soft Top Controller).