Test NTC-17: Checking Throttle Position 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. Ensure throttle is fully closed and against throttle stop screw. Using scan tool, monitor throttle position sensor voltage while slowly moving throttle from closed position to fully open position. If throttle position sensor voltage is at least 3.4 volts with throttle fully open, go to next step. If throttle position sensor voltage is not at least 3.4 volts with throttle fully open, replace throttle position sensor. Perform TEST VER-2A .
- Turn ignition on with engine off. Using scan tool, monitor throttle position sensor voltage while slowlymoving throttle from closed position to fully open position. If throttle position sensor voltage changes smoothly, go to next step. If throttle position sensor voltage does not change smoothly, replace throttle position sensor. Perform TEST VER-2A .
- Turn ignition on with engine off. Ensure throttle is fully closed and against throttle stop screw. Using scan tool, read throttle position sensor voltage. If throttle position sensor voltage is 1.5 volts or less with throttle fully closed, throttle position sensor is operating properly. Test is complete. If throttle position sensor voltage is more than 1.5 volts with throttle fully closed, replace throttle position sensor. Perform TEST VER-2A .