The TPS is a variable resistor. As the accelerator pedal is depressed and released, the resistance inside the sensor changes. The computer uses this reading to determine proper air/fuel mixture and ignition timing settings.
Removal & Installation
- Disconnect the negative battery cable.
- Remove the necessary air intake components to access the TPS.
- Detach the electrical wire harness plug from the sensor.
- Paint an alignment mark on the sensor housing to the throttle body.
- Remove the sensor attaching bolts.
- Remove the sensor from the throttle body.
- Installation is the reverse of the removal procedure.
- Verify that the throttle valve is at the closed throttle position.
- Disengage the wiring harness connector from the TP sensor.
- Using a Digital Volt-Ohmmeter (DVOM) set on ohmmeter function, probe terminals C and D on the TP sensor.
- Insert a 0.020 inch (0.50mm) feeler gauge between the throttle adjusting screw and the throttle lever. Verify that there is no continuity.
If there is no continuity, adjust the TPS as follows:
- Loosen the TPS mounting screws.
- Insert a feeler gauge between the throttle adjusting screw and the throttle lever.
- There should be continuity when inserting a 0.006 inch (0.15mm) feeler gauge and there should be NO continuity when inserting a 0.020 inch (0.50mm) feeler gauge.
- Tighten the mounting screws.
- Replace the TPS if not as specified.