What is the detection method for the accelerator pedal sensor?

[JulianLee]

Detection method: Remove the accelerator pedal assembly; locate the accelerator pedal position sensor; identify the signal output circuit corresponding to the accelerator pedal position sensor; use a multimeter in resistance mode to measure this circuit; operate the accelerator pedal while observing whether the multimeter readings change to determine if there is a fault; depending on the vehicle model, follow the specific measurement standard steps (refer to the repair manual). Inspection of the accelerator pedal position sensor: 1. External circuit inspection. Use the resistance mode of a multimeter to measure the resistance between each terminal of the APPS and the corresponding ECU terminal to determine if there are any short circuits or open circuits in the external wiring. 2. Sensor voltage measurement. Turn off the ignition switch, unplug the APPS sensor connector, turn the ignition switch to ON, and measure the voltage between terminals 1# and 2# of the harness-side connector and ground, which should be 5V, while terminals 3# and 5# should read 0V. 3. Sensor resistance measurement. Turn off the ignition switch, unplug the APPS sensor connector, and measure the resistance between terminals 5# and 6# on the sensor side, which should be 1.2±0.4KΩ, and between terminals 1# and 5#, which should be 1.7±0.8KΩ. 4. Data stream detection. Use the "X-431 fault diagnostic tool" to read the engine system data stream, which includes three data streams related to the accelerator pedal position sensor: "Accelerator Pedal 1 Potentiometer Voltage Value", "Accelerator Pedal 2 Potentiometer Voltage Value", and "Accelerator Pedal Opening Before Filtering".