Diagnostic Aids
Scan tool displays throttle position in volts. Voltage should be about .45-.85 volt with throttle closed and ignition on or at idle. Voltage should steadily increase as throttle is moved toward wide open throttle. Scan tool throttle angle percentage will display as zero percent with closed throttle and 100 percent with wide open throttle. Check connector and sensor terminals for moisture or corrosion. Clean and replace as necessary. If corrosion is found, check connector seal and repair or replace as necessary. If DTC is intermittent, see TESTS W/O CODES article.