Pedal assembly

Pedal assembly

The DDE control unit requires a number of signals from the pedal assembly.

Brief description of components

The following components are described for the pedal assembly:

Brake-light switch

Two switches are built into the brake-light switch: the brake-light switch and the brake-light test switch (redundancy for safety reasons). The signals indicate to the DDE control unit whether the brake pedal has been pressed.

Function

The brake-light switch connects to earth, the brake-light test switch to positive. Both signals are checked for plausibility.

The following table shows how the signals behave:

Clutch module

On vehicles with manual gearboxes, the clutch module at the clutch pedal picks up the clutch position (clutch pressed: clutch switch open; clutch not pressed, clutch switch closed). The clutch module consists of a clutch switch and an electronic evaluation unit.

Accelerator pedal module

The accelerator pedal module detects the position of the accelerator pedal. The DDE control unit uses this to calculate the required position of the throttle valve, taking account of other factors.