How to solve the problem related to the throttle position sensor 1 2

The sensor must be broken. The electronic throttle is an important control component of the automobile engine. The basic structure of the electronic throttle system consists of the following parts:

1, engine 2, speed sensor 3, throttle position sensor 4, throttle actuator 5, throttle 6, accelerator pedal position sensor 7, vehicle speed sensor 8, transmission 9, accelerator pedal 10, throttle electronic control unit (ECU).

The throttle position sensor is a device that detects the state of the engine.

A throttle position sensor, also known as a throttle opening sensor or throttle switch, is a device used to detect the status of an engine. Its main function is to detect whether the engine is in idle or load condition, acceleration or deceleration condition. It is essentially a variable resistor and several switches, which are mounted on the throttle body, and the shape and internal structure are shown in the figure below.

The shaft of the resistor is linked to the throttle, and it has two contacts: a fully open contact and an idle contact. When the throttle is in the idle position, the idle contact is closed, and the idle condition signal is output to the computer; When the throttle is in other positions, the idle contact is opened, and the voltage signal is output relative to the different angles of the throttle, and the travel calculator will identify the load of the engine according to the signal voltage value.

According to the change rate of signal voltage in a certain period of time, the increase or decrease rate is determined whether it is an acceleration or deceleration condition. Based on this information, the computer can be used to correct the amount of fuel injected or to control the oil cut-off.

What does the throttle position sensor detect:

Throttle position sensors detect structures and circuits. Switching output throttle position sensors are also known as throttle switches. It has two sets of contacts, the idle contact IDL and the full-load contact PSW.

A cam coaxial to the throttle controls the opening and closing of the two switch contacts.

When the throttle is in the fully closed position, the idle contact IDL is closed, and the ECU determines that the engine is in the idle condition according to the closing signal of the idle switch, so as to control the amount of fuel injection according to the requirements of the idle condition. When the throttle is opened, the idle contact opens, and the ECU uses this signal to control the fuel injection in the transition from idle to low load.

When the throttle is opened to a certain angle, the full-load contact begins to close, and sends a code to the ECU to signal that the engine is in full load operation, and the ECU carries out full load concentration control according to this signal. A switch-output throttle position sensor for the Toyota 1G-EU engine electronic control system.