Test NTC-17: Checking Throttle Position (TP) Sensor Calibration
- Ensure ignition is off. Check throttle cable, cruise control cable (if equipped) and throttle valve on throttle body for binding. If no binding exists, go to next step. If binding exists, repair or replace components as necessary. Perform TEST VER-2A .
- Turn ignition on with engine off. Using scan tool, monitor TP sensor voltage while slowly moving throttle from closed position to fully open position. If TP sensor voltage changes smoothly, go to next step. If TP sensor voltage does not change smoothly, replace TP sensor. Perform TEST VER-2A .
- Close throttle. Ensure throttle is fully closed and against throttle stop screw. Using scan tool, read TP sensor voltage with throttle fully closed. If TP sensor voltage is 1.5 volts or less with throttle fully closed, go to next step. If TP sensor voltage is more than 1.5 volts with throttle fully closed, replace TP sensor. Perform TEST VER-2A .
- Fully open throttle. Using scan tool, read TP sensor voltage with throttle fully open. If TP sensor voltage is at least 3.4 volts with throttle fully open, TP sensor is operating properly. Test is complete. If TP sensor voltage is not at least 3.4 volts with throttle fully open, replace TP sensor. Perform TEST VER-2A .