Component description Drive stage selection Function The drive stage selection device transfers driver’s requests in the form of voltages to the control unit. The control unit then derives the corresponding engine speed or volumetric charge from these voltages. Block diagram Pin 13 Pin 39 Pin 13 Pin 27 Pin 45 U = Reference voltage, approx. 5 V from the EDC control unit u = Setpoint Pedal travel sensor simulation values Lower idle speed: 257–539 mV / upper idle speed: 2944–4501 mV Empty fuel switch:
switch-on point at 569–976 mV (typically 800 mV) top idle speed lower idle speed 257 mV 976 mV 2944 mV 4501 mV [ mV ] 539 mV 569 mV Fault registration Empty fuel switch range (typically 880 mV) Exceptionally, the voltage “u” is produced electronically as drive position selection, or the setpoint selection (drive position selection) takes place via the CAN bus. 16