Throttle Position Sensor (PWG)

The PWG provides two separate variable voltage signals to the MS S52 control module for determining the request for EDR operation. The MS S52 monitors the changing signal ranges of both circuits as the pedal is pressed from idle to full throttle.

PWG Pot #1. = 0.5V to 4.5V.

PWG Pot #2. = 0.5V to 2.0V

PWG Pot signal #1. is the primary input for throttle opening request. The signal from Pot #2. is used primarily for plausibility checking. If the signal ranges are incorrect, The MS S52 will activate an emergency operating program based on the specific fault recognized.

Fig 1: Throttle Position Sensor Circuit Schematic

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Throttle Position Sensor Check Sheet

Courtesy of BMW OF NORTH AMERICA, INC.