Component description for the accelerator pedal sensor - GF30.20-P-2010AMG

ENGINE 156.982 in MODEL 209

ENGINE 156.983 in MODEL 211, 219

ENGINE 156.984 in MODEL 216, 221

Location on model 164, 251

Fig 1: Identifying Accelerator Pedal Sensor - Model 164, 251

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The accelerator pedal sensor is located at top right of accelerator pedal module.

Location for model 209, 211, 216, 219, 221

Fig 2: Identifying Accelerator Pedal Sensor - Model 209, 211, 216, 219, 221

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The accelerator pedal sensor is located at top right of accelerator pedal module.

Task

The accelerator pedal sensor converts the mechanical operation input by accelerator pedal into an electrical voltage corresponding to the accelerator pedal position.

Design of accelerator pedal module for model 164, 251

Fig 3: Identifying Kickdown Simulator And Desolator Pedal Sensor Model 164, 251

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The kickdown simulator is not an electrical component. It is designed to enable the driver to sense with his foot the point at which the accelerator pedal is fully depressed (full load position).

The accelerator pedal sensor can only be replaced completely by an accelerator pedal module.

Design of accelerator pedal module, model 209, 211, 216, 219, 221

Fig 4: Identifying Accelerator Pedal Sensor And Kickdown Simulator Model 209, 211, 216, 219, 221

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The kickdown simulator is not an electrical component. It is designed to enable the driver to sense with his foot the point at which the accelerator pedal is fully depressed (full load position).

The accelerator pedal sensor can only be replaced completely by an accelerator pedal module.

Body (internal circuit)

Fig 5: Identifying Internal Circuitry Of Pedal Value Sensor

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function

The accelerator pedal sensor consists of a shaft with a ring magnet. The ring magnet rotates in a printed circuit board with stator in the two fixed Hall elements. This produces a change in the voltage. The supply voltage of 5 V is performed by the ME-SFI [ME] control unit.N3/10 The supply voltage in the accelerator pedal sensor is halved for sensor 2.

Information from the accelerator pedal position is fed in the form of two signal voltages to the ME-SFI [ME] control unit.

If there is a fault on Signal 1 (sensor 1) the system switches over to Signal 2 (sensor 2) and limp-home is activated.

Signal 1 ranges are defined as percentages of the supply voltage (approx. 5 V) as follows:

<4.0% is the signal caused by short circuit to ground - too small
4.0 to 9.4% - idle range
9.4 to 81.0% - partial load range
81.0 to 96.0% - full load range
>96.0% the signal is too high due to a short-circuit to positive.

Kickdown recognition takes place by the ME-SFI [ME] control unit if the accelerator pedal sensor prescribes full load for a certain time.