What does it mean when the throttle position sensor 1-2 is unreasonable?
1 Answers
An unreasonable position between sensor 1 and 2 is generally caused by the throttle. If the throttle has been replaced with an original equipment manufacturer (OEM) part, it is recommended to check whether the wiring from the throttle connector to the engine control unit (ECU) connector is damaged. Use a diagnostic tool to check the signal voltage of the throttle position sensor. In such cases, cleaning the throttle and performing a reset can be attempted. If the issue persists, replacing the throttle may be necessary. The functions of the throttle position sensor are as follows: 1. Detecting operating conditions: The throttle position sensor, also known as the throttle opening sensor or throttle switch, primarily detects whether the engine is in idle, load, acceleration, or deceleration conditions. It essentially consists of a variable resistor and several switches, installed on the throttle body. 2. Two contacts: The resistor's rotating shaft is linked to the throttle and has two contacts: a full-open contact and an idle contact. When the throttle is in the idle position, the idle contact closes, sending an idle condition signal to the ECU. When the throttle is in other positions, the idle contact opens, outputting a voltage signal corresponding to the throttle's rotation angle. The ECU uses this signal voltage to determine the engine's load and identifies acceleration or deceleration based on the rate of change in the signal voltage over time. The ECU uses this information to adjust fuel injection or perform fuel cut-off control.
