The air pressure sensor on the EFI gasoline car usually contains four lines, and its function and corresponding color can be as follows:
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1. Power supply or power line (usually red or black) : This line is connected to the positive terminal of the power supply and provides power to the sensor.
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2. Ground wire (usually black) : This wire is connected to the ground point of the vehicle (usually the body) and provides ground for the sensor.
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3. Signal line (usually green or blue) : This line is used to transmit the air pressure signal or data measured by the sensor to the vehicle's computer system.
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4. Temperature compensation line (usually yellow or white) : This line is used to transmit the ambient temperature information measured by the sensor for temperature compensation in order to more accurately measure air pressure.
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Please note that different models of vehicles and sensors may vary slightly, so specific colors and features may vary. To ensure accuracy, it is best to refer to your vehicle's technical manual or consult a professional automotive mechanic.
The four-wire air pressure sensor is a collection of pressure and temperature, respectively, a 5V power supply, 3.8V signal line 2, a pressure and a temperature, a total of four iron wire, generally installed behind the throttle. transducer (transducer) refers to a device or device that can feel a specified measure and convert it into a usable signal according to a certain law, usually consisting of a sensor and a conversion element. It is a detection device that can feel the measured information, and can transform the detected information into an electrical signal or other required form of information output according to a certain law to meet the requirements of information transmission, processing, storage, display, recording and control. It is the primary link to realize automatic detection and automatic control. The sensor is a measuring device that converts the measured quantity into a certain physical quantity which has definite relationship with it and is convenient for application with certain precision and law.