Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1997 GMC Yukon, 1997 GMC Suburban, 1997 GMC Pickup, 1997 GMC Cab & Chassis, and 1997 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
Scan tool displays throttle position in volts. Voltage should be about .45-.85 volt with throttle closed and ignition on. 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 the TESTS W/O CODES article.