Sensor

Throttle Position Sensor (potentiometer)

Checking the Throttle position 
what type of TPS is this
Linear sensor TPS switch type 3 wire


Explain its internal operation and why your voltage changes
Because when pushing the accelerator harder your reading or voltage is going up ,so its mean low accelerator
low voltage high accelerator high voltage

NOTE: Always use a 5V supply

Throttle angle	Voltage output
0 Degree  or  close	1.023 Volt
20  Degree	2.6 Volt
40 degree	2.8 Volt
60 Degree	3.00 Volt
80 Degree	3.3 Volt
90 Degree	4.57 Volt