Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the logical successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la
Throttle Position Sensor: Testing and Inspection
A "Scan" tool displays throttle position in volts. Voltage should increase at a steady rate as throttle is moved toward wide open throttle. The Electronic Control Module
(ECM) has the ability to auto-zero the
Throttle Position Sensor (TPS) voltage. Auto-zero can be described as the ability of the ECM to determine a closed throttle position at anytime the TPS voltage is within a specified range. A failure in the TPS or circuit should set a Code 21 or 22. Refer to
System Diagnosis / Diagnostic Charts / Diagnostic Trouble Codes.
Testing and Inspection