Turn indicator
The turn indicators are activated by the footwell module (FRM). Depending on the requirements, either all turn indicators or just the turn indicators on a single side are activated.
The footwell module (FRM) receives many input signals that cause the turn indicators to be switched on. The input signals are read directly into the footwell module (FRM) or are received via K CAN2
The front turn indicators are part of the headlights. The rear turn indicators are fitted in the outer elements of the rear lights.
The side turn indicators are fitted in the front side wall on each side, shown here on the F10 (optionally available in the exterior mirrors from 07/2012).
| Item | Explanation |
|---|---|
| 1 | Side-mounted turn indicator |
| 2 | two-pin plug connection |
| 3 | Turn indicator |
| 4 | Cover for side turn indicators |
The front and rear turn indicators and the side-mounted turn indicators are available for activation as soon as "Terminal R" is under power. The turn indicators are operated by the 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 light remain operational even when the information fails to reach the footwell module (FRM) through the bus system. This redundant data-transmission is also employed for activating the one-touch flashing function.
A fault with the front or rear turn indicators will cause the turn indicators to flash at twice their usual rate. All turn indicators are equipped with light-emitting diodes.
During one-touch flashing the turn indicators are activated once. The number of flashes can be set to once or three times in "Personal Profile".
A visual and acoustic indication of turn indicator status is supplied by the instrument panel (KOMBI). The footwell module (FRM) transmits the information to the instrument panel (KOMBI) via the K-CAN2, and the instrument panel responds by activating the acoustic sensor and the indicator lights simultaneously with the turn indicators. The acoustic signal and visual display in the instrument panel (KOMBI) are deactivated when the vehicle's central locking system is engaged while the hazard warning flashers are operating.