Turn signal/high beam switch
The turn indicators and the high-beam headlight are controlled by turn signal/high beam switch on the steering column switch cluster (SZL). The signal from the turn signal/high beam switch is transmitted both via FlexRay protocol and through a separate line to ensure functional redundancy. This increases system availability in the event of a fault. The turn indicator lights continue to operate, even if the information fails to reach the footwell module (FRM) through the bus system. This redundant data-transmission is also employed for one-touch flashing function and for the headlight flasher.
The steering column switch cluster (SZL) transmits the signal from the turn signal/high beam switch via FlexRay. The central gateway module (ZGM) transmits the signal to K CAN2. This is how the footwell module (FRM) receives the signals from the turn signal/high beam switch.
| Item | Explanation |
|---|---|
| 1 | High beam assistant button |
| 2 | On-board computer button |
| 3 | High-beam headlight |
| 4 | One-touch flashing, right |
| 5 | Continuous flashing, right |
| 6 | Headlight flasher |
| 7 | One-touch flashing, left |
| 8 | Continuous flashing, left |