Specifications

26
Sensors
The accelerator pedal module is located on the
pedal cluster and consists of
● the accelerator pedal
● the accelerator pedal position sender G79
and
● the accelerator pedal position sender 2 G185.
Both senders are sliding contact potentiometers
located on a common shaft.
Every change in the accelerator pedal position
changes the resistance of the sliding contact
potentiometers and consequently the voltage
transmitted to the engine control unit.
The accelerator pedal module
The signals from the accelerator pedal position
senders serve to communicate the driver’s input
to the engine control unit and also as kickdown
information for the automatic gearbox.
If a sender fails, the pedal value is limited to a
defined value. At full load, the output is
increased slowly. If the signals between G79 and
G185 implausible, the lower value is used.
The EPC (electronic power control) warning lamp
indicates a fault.
If both senders fail, the engine will run only at
idle and does not respond to the accelerator
pedal.
The EPC (electronic power control) warning lamp
indicates a fault.
Effects of signal failureUse of signal
No separate switch is used for kick-
down information. A mechanical pres-
sure point is integrated in the gas
pedal module which communicates
the „kickdown feeling“ to the driver.
Senders
S249_035
S249_034
For further information, please refer to
SSP 210 „Electronic Power Control“.