Test NTC-18: Checking TP Sensor Calibration
NOTE:
Possible causes are: Throttle Position (TP) sensor voltage less than 3.4 volts at Wide Open Throttle (WOT), TP sensor voltage change not smooth, throttle cable binding or TP sensor voltage more than 1.5 volts with throttle closed.
- Turn ignition off. Check throttle cable for binding. Also check speed control cable (if equipped). If cables are okay, go to next step. If cables are not okay, repair or replace as necessary. Perform TEST VER-2A: ROAD TEST FOR NON-OBD II .
- Turn ignition on with engine off. Using scan tool, read TP sensor voltage. Make sure throttle is fully closed and against throttle stop. Monitor TP sensor voltage while slowly opening throttle to WOT. If maximum voltage is at least 3.4 volts, go to next step. If maximum voltage is not at least 3.4 volts, replace TP sensor. Perform TEST VER-2A: ROAD TEST FOR NON-OBD II .
- Using scan tool, read TP sensor voltage. Make sure throttle is fully closed and against throttle stop. Monitor TP sensor voltage while slowly opening throttle to WOT. If voltage change was smooth, go to next step. If voltage change was not smooth, replace TP sensor. Perform TEST VER-2A: ROAD TEST FOR NON-OBD II .
- Using scan tool, read TP sensor voltage. Make sure throttle is fully closed and against throttle stop. If voltage is 1.5 volts or less, test is complete. If voltage is not 1.5 volts or less, replace TP sensor. Perform TEST VER-2A: ROAD TEST FOR NON-OBD II .