Accelerator pedal module

The accelerator pedal module detects the position of the accelerator pedal. Using this information, the DME control unit calculates the required position of the throttle valve while taking other criteria into account.

Fig 1: Identifying Accelerator Pedal Module And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

The accelerator pedal module works according the principle of magnetic resistance. Two Hall effect sensors (rotational angle) are used to enable monitoring and fault detection. The two Hall effect sensors are supplied separately with 5 Volts and earth by the DME. Transmission of the sensor signals is also separate. The signals are transmitted as analogue. The DME monitors the two input signals of the Hall effect sensors and compares them for plausibility.