SOFTWARE DOWNLOADING
New software can be downloaded into the steering wheel angle sensor module (SAS). When ordering software, the hardware and the software in the car is compared to the information in the Volvo central database. If the comparison is OK the software is downloaded to the control module. If the comparison between the car and Volvo central database is not OK, the database is updated with the car configuration. When this is complete the software is downloaded.
Scheme 69
- The steering wheel angle sensor module (SAS) is integrated in the steering wheel module (SWM)
- Steering wheel angle sensor.
Only cars equipped with DSTC (dynamic stability and traction control) have a steering wheel angle sensor module (SAS). The easiest way to determine if a car is equipped with DSTC (Dynamic stability and traction control) is to search for a switch, marked DSTC, positioned in the panel on the climate control module (CCM).
The steering wheel angle sensor module (SAS) is integrated in the steering wheel module (SWM). The only function of the steering angle sensor module (SAS) is to process the signals from the steering wheel angle sensor. The signals used by the DSTC system. The steering wheel angle sensor is installed on the steering wheel module (SWM). The sensor is directly connected to the steering wheel angle sensor module (SAS). The steering wheel angle sensor module (SAS) transmits signal information, via the high speed side of the controller area network (CAN), to the brake control module (BCM) and suspension module (SUM).
If a fault occurs, the steering wheel angle sensor module (SAS) detects this and a diagnostic trouble code (DTC) is stored. The DSTC function is switched off.
Diagnostic trouble codes (DTCs) stored in the steering wheel angle sensor module (SAS). This information can be read off using VIDA via the data link connector (DLC) in the vehicle.
The table below summarizes input and output signals to and from the steering wheel angle sensor module (SAS). The signal types are divided into directly connected signals, serial communication and controller area network (CAN) communication.
| Input signals | Output signals |
|---|---|
| Directly connected | Directly connected |
| The steering wheel angle sensor (7/91). Provides the steering wheel angle sensor module (SAS) with relevant information about the steering wheel angle from the straight ahead position, the speed of the steering wheel movements and about which direction the steering wheel is turned. | |
| Via Controller Area Network (CAN) communication | Via Controller Area Network (CAN) communication |
| Brake control module (BCM) (4/16). The steering wheel angle sensor module (SAS) provides the brake control module (BCM) with information about the steering wheel angle from the straight ahead position, the speed of the steering wheel movements and about which direction the steering wheel is turned Suspension module (SUM) (4/84). The steering wheel angle sensor module (SAS) provides the suspension module (SUM) with information about the position of the steering wheel and the speed at which it is turned. |
Scheme 70
The steering wheel buttons control functions and menu selection for
- Traffic information (option)
- Audio (option)
- Carphone (option)
- Cruise control (option).
The signals from the steering wheel buttons are transmitted via serial communication.
The steering wheel buttons are connected in series to the steering wheel module (SWM) via contact reel in the steering wheel hub. The steering wheel buttons are connected in the following order, counted from the contact reel
- Cruise control
- Audio /carphone
- Traffic information.
There are diagnostics for the steering wheel buttons.
This function can be used to continuously read off the status of the control module's input and output signals.
For further information about parameters, see DESCRIPTION OF PARAMETERS .