9-5 Sport Wagon (9600) L4-2.3L Turbo (B235) (2003)
/l4-2.3l_turbo_(b235)/Page-2900030.png)
General
The steering wheel control consist of 3 units (9 switches) integrated in the steering wheel and airbag module. The steering wheel control provides SID
information as to which of the switches is activated.
SID supplies +5 V to the steering wheel control via pin 22 and grounds it via pin 9.
The 9 steering wheel switches consist of 9 resistors connected in series. When a button is pressed, the relevant switch is grounded; see table.
When a connector is pressed, the total resistance in the circuit changes, as does the voltage value which SID then reads.
The horn switch (41) is connected in parallel with the steering wheel switches. When it is pressed, pin 22 is grounded directly to pin 9.
The table shows the correlation between the voltage on pin 22 and the switch that is activated.
