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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 ECM is a type of electronic control unit (ECU), which is an embedded system that employs software to determine the required throttle position by calculations from data measured by other sensors, including the accelerator pedal position sensors, engine speed sensor, vehicle speed sensor, and cruise control switches.
An engine control unit (ECU), also called an engine control module (ECM), [1] is a device that controls various subsystems of an internal combustion engine. Systems commonly controlled by an ECU include the fuel injection and ignition systems.
Throttle position; Fuel temperature; Exhaust oxygen content (narrowband) Road speed; The intake air mass is measured with a "hot-wire" mass airflow sensor: drawn in by intake manifold vacuum, air moves past an electrically heated wire filament, and the degree to which the filament is cooled indicates the mass of the airstream.
Tunable pulses output for Hall sensor or tachometer; Embedded stroboscope function (it is possible to use any free output) Output and input functions remapping; Determine throttle gate position by TPS sensor; Processing and writing to log file signals from 2 additional inputs (e.g. Oxygen sensor can be connected)
The ECU continuously corrects the injection duration so that Lambda=1 is always met. To be able to function the oxygen sensor needs to be hot, this requirement is meet by electrically pre heat the sensor. The pre heating element is fed by B+ via fuse 38 and the main relay, the sensor is grounded in the ECU via pin 50.