Rough Idle? Bad Engine RPM? Weak Acceleration? Diagnose a Throttle Body

In this video I explain how to test and diagnose the throttle body. Having a faulty throttle position sensor can cause rough idle, weak acceleration or limited engine RPM. So, in this video I explain everything you need to diagnose throttle position sensors. I start by explaining the sensor’s wiring diagram, then we identify all wires on the sensor, and after that we check the throttle body with scan tool and the next step is to check the sensor with multimeter. Those who do have or DON’T have scan tool can use this diagnostic video. I perform this diagnostic on a Ford Fiesta 2010.