All the wires are connected to the car computer.Ī four-wire throttle valve sensor contains two potentiometers, so it uses two signal wires to read the output of each potentiometer.
The electronic control unit Supplies 5 volts of power (reference voltage) to the throttle sensor via a “hot power” wire.
The two signal wires are responsible for transmitting the throttle position data to the ECU, while the other two wires are used for grounding and power. A four-wire throttle valve sensor has four wires, two are the signal wires, and two are earth and hot.Ī four-pin throttle valve sensor has two potentiometers inside which have common earth and hot wires. These kinds of sensors are used in cable-operated throttle bodies.Ĥ Pin Throttle Position Sensor Wiring Diagram 4 Pin Throttle Sensor Harness SchematicsĪ throttle valve sensor is a type of sensor used in automotive applications to monitor the position of the throttle. The ECU monitors the signal wire and uses it to calculate the engine’s throttle position. The sensor’s signal output wire should, ideally, be close to 0V when the throttle is closed and close to 5V when the throttle is wide open. This wire can generate a 0 to 5-volt signal. This wire offers ground to the sensor.Ī third wire is a signal wire which sends the information (signal) from the sensor to the engine control unit through this wire. The ground wire is additionally taken from the ECU. This reference potential means that the auto ECU Provides 5-volt power to the throttle sensor through this wire. The hot wire is a feed source that is taken from the automotive electronic control unit. Hot Power Wire (Reference voltage comes from the ECU)Īll the wires are connected to the electronic control unit.As the wiper moves along the resistor track, it varies the amount of voltage applied to the component.ģ Wire Throttle Position Sensor Wiring Diagram 3 Wire Throttle Sensor SchematicĪ three-pin throttle valve sensor has three wires: The signal wire is connected to the car computer. The potentiometer is usually connected as part of a voltage divider circuit, with one end of the divider connected to the earth (ground) and the other end connected to some higher voltage. In each case, the potentiometer’s resistance varies as the wiper moves along the resistor track.Ī potentiometer consists of three wires, earth, hot power, and a signal wire (wiper). Rotary potentiometers are used in a wide range of applications, from volume controls on stereo equipment to the sensors that determine the air-fuel mixture in an engine. This voltage is sent to the ECU, which uses it to make its calculations. It is usually a potentiometer, which creates a voltage based on the position of the throttle. The voltage is typically used by the engine management system to control fuel injection, ignition timing, and other engine parameters. The sensor is usually a variable resistor that produces an output voltage proportional to the throttle plate’s position. Throttle Position Sensor Wiring Diagram The Throttle Sensor Is Located On The Shaft Of The Butterfly ValveĪ throttle position sensor is a sensor used to monitor the position of the throttle plate in an internal combustion engine. Electronic Throttle Body Wiring Diagram.8 Pin Throttle Position Sensor Wiring Diagram.6 Pin Throttle Position Sensor Wiring Diagram.5 Pin Throttle Position Sensor Wiring Diagram.4 Pin Throttle Position Sensor Wiring Diagram.3 Wire Throttle Position Sensor Wiring Diagram.Throttle Position Sensor Wiring Diagram.
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