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A throttle position sensor (TPS) is a sensor used to monitor the throttle body valve position for the ECU of an engine. The sensor is usually located on the butterfly spindle/shaft, so that it can directly monitor the position of the throttle. More advanced forms of the sensor are also used. For example, an extra "closed throttle position ...
The throttle position sensor(s) are continually read and then the software makes appropriate adjustments to reach the desired amount of engine power. There are two primary types of Throttle Position Sensor (TPS): a potentiometer or a non-contact sensor Hall Effect sensor (magnetic device).
These later Digifant versions have 38-pin ECUs with Rapid Data Transfer and permanent DTC memory. All Eurovans with Digifant also have rapid data transfer and permanent DTC memory. These systems use a throttle plate potentiometer to track throttle plate position in place of the idle and full throttle switches used on earlier systems.
Throttle potentiometer: Swings 0.29 to 5.00 VDC 21 yellow/black to yellow/green: Air conditioner compressor load: Input 22 blue/red: MAF sensor (idle trim) - 23 unk: Left lambda sensor: Blue shielded 24 unk: Right lambda sensor: Blue shielded 25 red/black: Sensor ground: Ground side of coolant, fuel, MAP, and TP sensors 26 green/white: Air ...
2.3 Throttle position sensor (TPS) 2.4 Turbine speed sensor (TSS) 2.5 Transmission fluid Temperature sensor (TFT) 2.6 Kick down switch. 2.7 Brake light switch.
The driver requests the torque or engine speed requirements via accelerator pedal potentiometer thereby sending a signal to the engine ECU which then, depending on its mapping and data collected from various sensors, calculates in real time the quantity of injected fuel required, thus altering the fuel rack to the required position.