How to Test a Throttle Position Sensor?
TPS are manufactured using switch, potentiometer and combination designs. If the TPS is not adjustable then it becomes mandatory that you check throttle stop and throttle cable adjustments. Their improper functioning could cause symptoms such as, poor startup of the car, inefficient response of the throttle of the car, or idle stop. Switch and combination TPS are tested with ohmmeters. In order to test a non-adjustable TPS such as potentiometer TPS, a voltmeter is used and the following list, describes the steps involved in it. • You need to disconnect the throttle sensor harness. • Open the throttle valve manually and check the resistance between the terminal 1 and 2 changes. • Check the resistance in three different positions of the accelerator pedal. • You may record a resistance of approximately 10-ohms when the accelerator is fully, 2 to 10-ohms partially depressed and 2-ohms when completely released. It is good idea to go through the manual for specific information which may info
