Volkswagen Workshop Manuals
New Beetle L4-2.0L (AZG) (2003)
Sensors and Switches > Sensors and Switches - Powertrain Management > Sensors and Switches - Computers and Control Systems > Accelerator Pedal Position Sensor > Component Information > Testing and Inspection > Accelerator Pedal Position Sensor, Checking > Page 989
Accelerator Pedal Position Sensor: Testing and Inspection
Electronic Power Control (EPC) System, Checking
In the EPC or "E-Gas" system, the throttle valve is not operated via a cable from the accelerator pedal. There is no mechanical connection between the
The position of the accelerator pedal is communicated to the engine control module via two sensors for accelerator pedal position (changeable
The position of the accelerator pedal (driver's intention) is a main input value for the Engine Control Module (ECM).
Operation of the throttle valve occurs throughout the entire RPM and load range via an electric motor (throttle valve actuator) in the throttle valve
The throttle valve is operated by the throttle valve actuator according to the specifications of the Engine Control Module (ECM).
With the engine at standstill and the ignition switched on, the Engine Control Module (ECM) activates the throttle valve actuator exactly according to
With the engine running (under load), the Engine Control Module can open and close the throttle valve independently of the accelerator pedal position
In this way, the throttle valve can already be completely open, even though the accelerator pedal has only been depressed half way. This is
It would be wrong to assume that "E-Gas" consists of only one or two components. E-Gas is much more of a system containing all components that
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