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The sensor is just behind the throttle body, attached to the shaft.
To test, start the engine and verify the high idle condition exists currently. Shut it off, and detach the ECU from its bracket on the right of your passenger's feet. Remove the connector and then remove the cover on the connector (one Phillips and slide it back. Reconnect the plug to the ECU after locating pin 2 (numbers on the sides) where the yellow/white wire enters.
Start the motor and use your multimeter in voltage mode between ground (ECU bracket is OK) and the pin at the end of the yellow/white wire. Look for zero volts (less than 0.5) while the condition persists.
If the voltage is high (like 5.0V), adjust the TPS switch (sensor) at the throttle body by loosening its mounting screws and rotating it until it clicks reliably each time the throttle is closed. Re-check at the ECU pin. If you can't get it to zero volts reliably each time the pedal is let up, you may need to replace the TPS.
If adjustment solved it, consider the throttle body may need cleaning and its throttle stop screw adjusted.
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Art Benstein near Baltimore
Hospitality is the art of making guests feel like they're at home when you wish they were.
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