What are the reasons for the voltage inconsistency between throttle pedal signal 1 and 2?
2 Answers
Throttle pedal signal 1 and 2 voltage inconsistency may be caused by electronic throttle sensor failure. The electronic throttle pedal contains two ICs, serving as the primary/secondary pedal sensors. The factory-provided status voltage reference values can be considered as the reference voltage. When the pedal is not pressed, the primary IC reference voltage should be around 800mv, and approximately 4900mv when fully depressed. If the throttle pedal data deviates from the reference voltage (either too high or too low), it indicates potential electronic throttle pedal malfunction. Working principle of electronic throttle: The electronic throttle transmits signals indicating pedal depth and speed through position sensors. These signals are received and interpreted by the ECU, which then issues control commands. The throttle valve adjusts its opening angle accordingly, either rapidly or gradually. Symptoms of electronic throttle pedal failure: When the electronic throttle pedal is damaged, the dashboard warning light will illuminate. The car's throttle pedal may become stiff, produce abnormal noises when pressed, or fail to return to its original position after being depressed. Additionally, a damaged electronic throttle pedal can cause the throttle position sensor to malfunction, preventing the ECU from detecting throttle input. This may result in unstable idle speed, throttle sticking, unresponsive acceleration, and other issues that render the vehicle inoperable.
As an experienced auto mechanic, I often encounter inconsistent throttle pedal signal voltage issues in my daily work. Generally speaking, this is usually caused by sensor aging or damage. Those sensors tend to wear out after prolonged use, resulting in mismatched output voltages between signal 1 and 2. Wiring is another common problem area - loose connections or corroded terminals may cause short circuits or open circuits, thereby affecting voltage readings. Additionally, unstable power supply can sometimes be the culprit; if there's an issue with the vehicle's power circuit, the sensor won't receive stable input. I recommend that upon detecting such anomalies, first inspect the connectors and wiring for obvious wear or looseness, replacing components if necessary. Ignoring this problem may lead to acceleration lag or sudden stalling, seriously compromising driving safety - it's best to seek repairs promptly to prevent accidents. Having technicians check the sensors during routine maintenance is a smart practice to prevent minor issues from escalating into major troubles.
