What Causes the Voltage Mismatch Between Throttle Pedal Signal 1 and 2?
1 Answers
The reason for the voltage mismatch between throttle pedal signal 1 and 2 may be a fault in the electronic throttle sensor. The electronic throttle pedal contains two ICs, serving as the primary/secondary pedal sensors. The reference voltage values provided by the factory data can be used as benchmarks: when the pedal is not pressed, the reference voltage for the primary IC should be around 800mV, and approximately 4900mV when fully depressed. If the throttle pedal data deviates from these reference voltages—being either too high or too low—it indicates a potential fault in the electronic throttle pedal. How Electronic Throttle Works: The electronic throttle uses position sensors to transmit signals indicating the depth and speed of pedal depression. These signals are received and interpreted by the ECU, which then issues control commands. The throttle valve adjusts its opening angle accordingly, either quickly or gradually. Symptoms of Electronic Throttle Pedal Failure: If the electronic throttle pedal is damaged, the dashboard warning light will illuminate. The car's throttle pedal may become stiff, produce unusual noises when pressed, or fail to return to its original position after being depressed. Additionally, a faulty electronic throttle pedal can cause the throttle pedal sensor to malfunction, preventing the ECU from detecting the throttle position. This can lead to unstable idling, throttle sticking, unresponsiveness to acceleration, and ultimately render the vehicle inoperable.
