Electronic throttle pedal position sensor
Category:Brake system foundation - Date:2016-04-02
Introduction of electronic accelerator pedal position sensor
the electronic throttle pedal position sensor is an important component in the electronic throttle system. Through the electronic throttle pedal position sensor, the throttle transmits the throttle to tread the depth and speed of the signal. This signal will be received and read by the ECU, and then the control instruction is sent to the throttle to open quickly or gently. It should open the angle.
electronic throttle system is mainly composed of accelerator pedal, electronic accelerator pedal position, ECU, data bus, servo motor and throttle actuator.
position of electronic accelerator pedal position sensor.
the electronic throttle pedal position sensor is installed inside the accelerator pedal, and it monitors the position of the accelerator pedal at any time. When the height position of the accelerator pedal is changed, the information will be sent to ECU in a moment, and the data is processed by ECU. A control signal is calculated, the servo motor relay is sent through the line, the servo motor drives the throttle actuator and the data bus is responsible. Communication between system ECU and other ECU.
electronic throttle position sensor wiring and pin location.
The working principle of the electronic throttle position sensor vehicle maintenance technology network / potentiometer accelerometer position sensor works on the principle of divider circuit, and ECU supplies 5V voltage of sensor circuit. The electronic throttle pedal is connected by the rotating shaft of the rotor and the sliding rheostat inside the sensor. When the position of the accelerator pedal position sensor is changed, the voltage of the brush and the grounding end changes, and the ECU changes the voltage to the position signal of the accelerator pedal. The accelerator pedal position sensor outputs two sets of signals to ECU at the same time, which ensures the reliability of output signal.
Potentiometer type acceleration pedal position sensor
Repair of electronic throttle position sensor (1) inspection of external lines Reference map, the resistance of the multimeter is used to measure the resistance values between the terminals of the electronic throttle position sensor APPS and the corresponding ECU terminals, to determine whether there is a short circuit and a fault in the circuit.
Each connection of the electronic throttle position sensor
2) sensor voltage measurement Turn off the ignition switch, pull out the electronic throttle position sensor APPS sensor plug, ignition switch ON, measure the line bundle side plug 1#, 2# terminal and the overlap between the voltage value should be 5V voltage, 3#, 5# terminal voltage 0V.
3) sensor resistance measurement Turn off the ignition switch and pull out the electronic throttle position sensor APPS sensor plug. The resistance of the sensor side 5# and 6# terminals is 1.2 + 0.4 K Omega, and the resistance between the 1# and 5# terminals is 1.7 + 0.8 K Omega.4) data flow detection the data flow of the engine system is read with the "X-431 fault diagnosis instrument". There are 3 data streams involving the acceleration pedal position sensor: "acceleration pedal 1 potentiometer voltage value", "acceleration pedal 2 potentiometer voltage value", "pre filter accelerator pedal opening". Access diagnostic instrument, ignition switch ON (engine OFF), read engine system data flow. Do not step on the accelerator pedal, "acceleration pedal 1 potentiometer voltage value" should be about 0.7V, "acceleration pedal 2 potentiometer voltage value" is about 0.35V, "pre filter accelerator pedal opening" should be 0%. Slowly stepping on the accelerator pedal, the above 3 data streams should be changed at the same time. The rule of the change is as follows: "the speed of the accelerator pedal opening before filtering" should gradually increase to 100%; the "acceleration pedal 1 potentiometer voltage value" should be increased at the same time as the "acceleration pedal 2 potentiometer voltage value", but the instantaneous value of the former is equal to 2 of the latter. Times.
5) precautions for inspection and maintenance Inspection should be paid attention to whether the building material accelerator pedal can step on the full open position, whether the carpet is too thick or unsuitable for the seat under the car seat to mark the pedal, and can not step on the position of 100%.
influence of electronic throttle position sensor failure on vehicle.1, an unmeasured location signal of the throttle Cause: line break between ECU and sensor.2, engine acceleration weakness Reason: the 2 resistors inside the sensor can not be detected each other, ECU can not get the correct position of the current accelerator pedal, and the engine accelerates the failure phenomenon; a set of resistance failure in the potentiometer causes the ECU to receive the wrong signal.3, engine can't accelerate Cause: failure of potentiometer in electronic accelerator pedal or circuit breakage.
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