Testing Procedure for Throttle Position Sensor

[DeKylie]

Throttle position sensor is also known as throttle opening sensor or throttle switch. The testing procedure for throttle position sensor is as follows: 1. Read data stream. When reading the data stream of TPS, slowly press and release the accelerator pedal for observation to prevent floor mats from obstructing the opening or closing of the throttle, which may lead to inaccurate test data. 2. Measure the voltage of throttle position sensor. The signal voltage of throttle position sensor increases with the opening of throttle. When the throttle is fully opened, its signal voltage is close to 5V, and when the throttle is closed (idle), its signal voltage is about 0.5V. 3. Test by unplugging the sensor connector. For cars equipped with automatic transmission, if it is suspected that the abnormal throttle position sensor (TPS) causes the automatic transmission to shift impact, the TPS plug can be unplugged for test driving, and manual shifting can be used. If the upshift and downshift are smooth at this time, it means that the mechanical part of the automatic transmission is normal, the problem lies in the control part, and the TPS may be faulty.