Turn Signal/Headlight Dipping Switch

Turn Indicator Low Beam Switch

Brief description of components

Turn indicator low beam switch
The steering column lever to the left of the steering wheel switches the functions
- Turn indicator (one-touch flashing or continuous flashing left or right) with terminal R On,
- Parking light left or right: with terminal R OFF, over press the switch beyond the engaging point, as for continuous flashing.
- High beam and headlight flasher.

The steering column lever no longer engages in the switch positions. The functions are operated by
- Touching the switch to move it forwards or backwards: high beam and low beam
- Touching the switch to move it to the right or left: one-touch indicating
- Over pressing the engaging point: continuous flashing

If the driver operates the steering column lever
- a message is transmitted to the light module. Signal path: From the SZL (steering column switch center) via the data bus BYTEFLIGHT to the SIM (Safety and Information Module); from SIM via the data bus BYTEFLIGHT to the ZGM (Central Gateway Module); from the ZGM via the data bus K-CAN SYSTEM to the LM (light module).
- At the same time, the light module evaluates a direct signal from the steering column lever. This signal is transmitted across a separate cable, making it independent of the K-CAN SYSTEM data bus.

Function limitation in the case of failure of the data buses:
- High beam and headlight flasher only run if the steering column lever is held.
- The indicator light only runs if the steering column lever is held. no continuous flashing, no automatic reset
- No hazard warning lights in the event of a crash and when arming the antitheft alarm.