What happens when the throttle position sensor is unplugged?

It is a device to detect the state of the engine, and it will be impossible to detect whether the engine is in idle or load condition if the plug is unplugged.

The throttle position sensor is a throttle opening sensor or a throttle switch, and its main function is to detect whether the engine is in idle or load state, acceleration or deceleration state. It is essentially a variable resistor and several switches installed on the throttle body.

When the throttle valve is in other positions, the idle contact is opened, and voltage signals with different angles relative to the throttle valve are output, and the computer identifies the engine load according to the signal voltage value; According to the change rate of signal voltage in a certain period of time, whether it is an acceleration state or a deceleration state is identified. According to these working conditions, the computer corrects the fuel injection quantity or controls the fuel cut-off.

Extended data:

Use of throttle position sensor:

1. When the throttle is fully closed, the idle contact IDL should be turned on; When the throttle valve is fully open or nearly fully open, the full load contact PSW should be opened; At other openings, both contacts should be non-conductive.

2. The accelerator of the automobile engine is controlled by the driver through the accelerator pedal, which changes the air intake of the engine, thus controlling the operation of the engine. Different throttle opening marks different working states of the engine.

3. In order to meet the requirements of different working conditions, the electronically controlled gasoline injection system is equipped with a throttle position sensor on the throttle body. It can convert the throttle opening into an electrical signal and send it to ECU as the basis for ECU to judge the working condition of the engine.

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