ME-SFI electronic accelerator, function - GF30.20-P-3012KE

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ENGINE 271.921 in MODEL 203

ENGINE 271.940 in MODEL 203, 209

ENGINE 271.941 in MODEL 211

ENGINE 271.944 in MODEL 171

ENGINE 271.946 in MODEL 203

ENGINE 271.948 in MODEL 203

ENGINE 271.955 in MODEL 209

ENGINE 271.956 in MODEL 211

Fig 1: ME-SFI Electronic Accelerator Function Diagram - Engine 271.948

The electronic accelerator function is integrated and controlled in the ME electronics control unit depending upon the driver input and the operating condition, the opening angle of the throttle valve and the air recirculation flap.

Input signals for the electronic accelerator pedal:

Accelerator pedal position
Brake actuation (via the ESP control unit)
Cruise control operation (up to 05/05 shift signals via the steering column module; from 06/05 via the ESP control unit)
Reduction of the engine torque (from ESP control unit)
Drive position (via the ETC [EGS] control unit) (for transmission 722)
Clutch operating system (for transmission 716)

The position of the accelerator pedal and the speed at which the position of the accelerator pedal changes are transmitted to the sensor located on the accelerator pedal mechanically.

The Hall sensor in the accelerator pedal sensor sends an appropriate voltage signal to the ME control unit. It evaluates the voltage signal and controls the throttle valve actuator and the recirculated air flap actuator dependent on the performance map.

The opening angles of the throttle valve and the recirculated air flap are altered by the actuator motors in the actuators according to actuation of the ME-SFI [ME] control unit.

The actual value potentiometers in the actuators notify the current throttle valve and the recirculated air flap position to the ME control unit.

The second potentiometer in the actuators (throttle valve and air recirculation flap) and the second Hall sensor in the accelerator pedal sensor deliver the reference values for plausibility checking of the input signals to the ME-SFI [ME] control unit.

Any detected faults are stored in the fault memory and can be read out and deleted using STAR DIAGNOSIS.

Additional functions of the electronic accelerator pedal:

Idle speed control
Cruise control (CC [TPM])
Torque reduction (e.g. for acceleration slip regulation mode)
Emergency mode
Data transfer over CAN

If the brake pedal is operated, this always means idle speed input.

Crankshaft position sensor, component description	L5		GF07.04-P-6010KE
Coolant temperature sensor, component description	B11/4		GF07.04-P-6040KE
ME-SFI [ME] control unit, component description	N3/10		GF07.61-P-6000KE
Air recirculation flap actuator, component description	M16/7		GF09.50-P-2100KE
Clutch pedal switch, component description	S40/3	With transmission 716	GF29.10-P-2200KE
Accelerator pedal sensor, component description	B37		GF30.20-P-2010KE
Throttle valve actuator, component description	M16/6		GF30.20-P-2020KE
CC [TPM] switch, component description	S40/4		GF30.20-P-2100KE
Stop lamp switch, component description	S9/1	Model 203, 209, 211	GF42.10-P-2010PE