The Throttle Position Sensor (TPS) provides a voltage signal that changes relative to the throttle blade. Signal voltage will vary from about 0.5 at idle to about 5 volts at wide open throttle.
The TPS signal is one of the most important inputs used by the ECM for fuel control and for most of the ECM control inputs.
A Scantool reads throttle position in volts. It should read less than 1.25 volts with throttle closed and ignition on or at idle. Voltage should increase at a steady rate as throttle is moved toward WOT.
An open or short to ground in CKT's 416 or 417 will result in a Code 22.
Throttle closed.
Does scantool display TPS 0.2 volts (200mV) or below?