Accelerator pedal module

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

Fig 1: Identifying Accelerator Pedal Module And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

The accelerator pedal module works according to the magneto-resistive principle. Two Hall sensors (rotational angle) are deployed to enable monitoring and fault recognition.

The two Hall sensors are supplied separately with 5 Volts and ground by the DME. The sensor signals are also transferred separately. The signals are transferred as analog.

The DME monitors the two input signals of the Hall sensors and compared these for plausibility.