PRE-RELEASE
Pedal request
| Pedal request |
The voltage from sensor 1 is connected to control module pin 8(B) and increases when the pedal is depressed, approx. 0.5-4.5V.
The voltage from sensor 2 is connected to control module pin 24(B) and increases when the pedal is depressed, approx. 0.3-2V.
The control module uses the value from sensor 1 as an indicator of the driver's torque request. The value is converted into requested air mass/consumption and constitutes the most important input signal for air mass control.
The value from potentiometer 2 is used to check potentiometer 1. Unless these values agree, a DTC will be generated and the pedal sensor will go to limp-home mode. When the pedal is fully released, the control module will adapt the voltage from sensor 1.
With the accelerator pedal fully released, the requested air mass/combustion = 0 and if also vehicle speed = 0, idle speed control will be activated. The lowest value from sensor 1 is adapted as fully released pedal and consequently gives idling speed.
