Throttle Position Sensor: Service and Repair

Throttle Body And Related Components:

1. Disconnect the Idle Speed Control By-Pass Air (ISC-BPA) valve assembly connector from the wiring harness.
2. Remove the two ISC-BPA retaining bolts.
3. Remove the ISC-BPA valve and gasket.
4. Disconnect the Throttle Position (TP) sensor electrical connector.
5. Remove the two TP sensor retaining bolts, TP sensor, and gasket.
6. Position the TP sensor and gasket on the throttle body. Make sure that the rotary tangs on the TP sensor are aligned with the throttle body.
CAUTION: Slide rotary tangs into position over the throttle shaft blade, then rotate the TP sensor CLOCKWISE to the installed position. Failure to install the TP sensor in this manner may result in excessive idle speeds.
7. Install the two TP sensor retaining bolts, torquing to 25-33 lb. in. (2.8-3.8 N-m).
8. Clean the ISC-BPA gasket mating surfaces.
NOTE: If scraping is necessary, use care not to damage ISC-BPA valve or throttle body gasket surfaces, or drop material into the throttle body.
9. Install the gasket and ISC-BPA valve on the throttle body.
10. Install the ISC-BPA retaining screws, torquing them to 71-102 lb. in. (8-11 N-m).
11. Connect the electrical connectors for the ISC-BPA valve and the TP sensor.
NOTE: The TP sensor is not adjustable.