How does the throttle position sensor determine the idle contact?

Test the supply voltage Pull off the plug on the throttle position sensor. Turn on the ignition switch and measure the voltage between Vcc and idle contact, Vcc and full throttle contact respectively, which should be 4.55.5V V. If it does not meet the requirements, check the ECU connection circuit. If the voltage value meets the requirements, check the resistance of the throttle potentiometer.

Throttle position sensor detection method

Resistance detection: unplug the throttle potentiometer and measure the resistance between Vcc and idle contact. The resistance between Vcc and VTH should be1.52.6kΩ, and slowly turn the throttle lever to the full open position of 0.751.3k. At this time, the resistance of the potentiometer should rise to the maximum value of 3.6kω. If one item does not meet the requirements, the throttle position sensor is faulty.

The throttle position sensor should be replaced. The throttle position sensor is also called throttle opening sensor or throttle switch. Its main function is to detect whether the engine is in idle or load state, acceleration or deceleration state. Essentially, it is a variable resistor and several switches installed on the throttle body.