Toyota Corolla Quiz
Emission Control System

Throttle Position Sensor (TPS)

In this manual: Emission Control System
Owner's Manual — 7Controls and Instruments — 49Engine Starting and Vehicle Operation — 5Actions if the Engine Does Not Start — 18Maintenance — 30Gasoline Engines - Repair Procedures Without Engine Removal from Vehicle — 17Gasoline Engines - Removal and Overhaul — 21Diesel Engine — 26Engine Electrical Equipment — 13Cooling and Heating Systems — 17Fuel and Exhaust Systems — 14Emission Control System — 19Manual transmission — 6Automatic transmission — 9Clutch and Axle Shafts — 11Brake System — 20Suspension and Steering — 24Body — 29Electrical System — 24Wiring Diagrams — 24
~1min read

The throttle position sensor is located on the end of the throttle valve shaft (see subsection 5.12.).

By monitoring the sensor output voltage, the electronic control unit can adjust fuel delivery according to the throttle valve opening angle.
An open circuit or loose connections in the throttle position sensor circuit may cause fuel to inject from the injector spontaneously, resulting in rough idle, because the control unit "interprets" the changing signal as throttle valve movement.

For the procedures for testing and installing the sensor, refer to subsection 5.12.

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