APP sensor (accelerator pedal position) along with the throttle valve is used to implement the principle of control by wire. This sensor is resistive. Sensors in the accelerator pedal are designed to register the driver's requests to accelerate, slow down or maintain vehicle speed. These signals are input to the ECM and the throttle is opened by a motor built into the throttle body to change the angle.
APP sensor signals (accelerator pedal position) tested for absolute value and validity. The pedal is supplied with two different reference voltages. In case of failure of one sensor, the signal of the second one can be used in the emergency control mode.
The wires connecting the ground and signal circuit of both potentiometers to the EMS are twisted into two twisted pairs, which made it possible to avoid the use of a shield.
When an incorrect ECM signal is received (the engine control unit) switches to emergency mode. APP sensor (accelerator pedal position) mounted on the accelerator pedal.
APP Sensor Connector C0787 Pin Table (accelerator pedal position)
contact no | Purpose | Input signal / output signal |
1 | Sensor weight 2 | - |
2 | Sensor control signal 1 | Output signal |
3 | Sensor weight 1 | - |
4 | Not used | - |
5 | Sensor control signal 2 | Output signal |
6 | Power supply 2 5 V | Input signal |
7 | Power supply 1 5 V | Input signal |
8 | Not used | - |
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