Activation of rear lights

As the master control unit, the Front Electronic Module (FEM) is responsible for the functions of the vehicle lights. It decides which lighting functions need to be activated or deactivated and transmits this information to the Rear Electronic Module (REM) via K-CAN2. In turn, the Rear Electronic Module (REM) reports the status of the respectively activated function to the Front Electronic Module (FEM).

The switch-on signal for the brake lights is transmitted to the Front Electronic Module (FEM) by the Dynamic Stability Control (DSC) via FlexRay. The Front Electronic Module (FEM) transmits the signal to the Rear Electronic Module (REM) on the K-CAN2. For increased safety, there is an additional line between Front Electronic Module (FEM) and Rear Electronic Module (REM). The Rear Electronic Module (REM) evaluates the signal automatically for activation of the brake lights.

The lighting functions in the rear light are:

• Tail light
• Number-plate light
• Turn indicator
• Brake light
• Side marker light
• Rear fog light
• Reversing lights