Day 2 - Throttle postion sensor

What is a TPS?
Throttle position sensor is a sensor used to monitor the position of the throttle in an internal combustion engine.

Explain its internal operation and why your voltage changes.
The throttle position sensor indicates position of the throttle valve. The TPS(Throttle postion sensor) is mounted on the throttle body and converts the throttle valve angle into an electrical signal. As the throttle opens, the signal voltage increases. Inside the TPS there is a resistor and a wiper arm.The arm is always contacting the resistor. At the point of contact, the availabe voltage is the signal voltage and this indicates throttle valve postion.

VCC: 5V reference voltage
VTA: Voltage Throttle Angle
IDL: Idle switch
E2: Earth

Measurements

Throttle angle	Voltage output
0	0.631V
25%	1.726V
50%	2.288V
75%	3.127V
100%	3.938V

Graph