Turn Signal, High Beam, BC And CC Switch
The turn signal and high beam switch is a button (momentary switch) that is used to operate the high beam, direction indicators and to switch on the parking lights.
The turn signal switch incorporates two axial (push button) switches for the On-Board Computer displays.
The top switch (2) activates the board computer display on the instrument cluster below the tachometer. This shows information such as average fuel consumption and average speed. The lower switch (1) activates the On-Board Computer display on the instrument cluster below the speedometer. This shows information such as fuel level and range.
Automatic cancelling of the turn signals is controlled by the signal from the steering angle sensor. The SZL sends the command via the bus system to the light module (LM) where it is converted.
Brief operation of the turn signals can be accomplished by touching the stalk as far as (but not beyond) the point of resistance.
The parking light function is switched on by pressing the stalk beyond the point of resistance when the ignition is off. The function is cancelled by pressing the stalk in the opposite direction
To switch the high beam "ON", the stalk is tapped forwards, and to switch high beam "OFF" or flash the headlights, it is tapped backwards. When the driver operates the turn signal or high beam switch, a message is sent to the light module.
The signal travels from the SZL via the byteflight bus to the SIM. From there is passes to the ZGM and onto the K-CAN SYSTEM and the light module (LM).
The light module simultaneously analyzes a redundant back-up signal from the SZL. This is transmitted via a separate lead. This means that the signal is independent of the K-CAN SYSTEM and the byteflight bus.
The purpose of this duplication is to ensure vehicle safety. Even if the bus systems fail, the functions can still be operated.