Honda 8-17106-680-0 Sensor, Driver Side

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The Throttle Position (TP) sensor is located on the throttle body, on the end of the throttle valve shaft. It is a variable potentiometer that varies its output voltage in proportion to the angle of the throttle valve. This output signal is monitored by the PCM, which uses this data to help determine the correct amount of fuel metered into the engine by the injectors. A broken or loose TP sensor can cause intermittent bursts of fuel from the injectors and an unstable idle because the PCM thinks the throttle valve is moving. Any problems in the TP sensor or its circuit will set a diagnostic trouble code. The first test checks the signal voltage from the TP sensor. Backprobe the GROUND wire and the SIGNAL wire on the backside of the electrical connector with a digital voltmeter. Turn the ignition switch to ON (engine not running). The TP sensor should produce between 0.50 and 1.0 volt at closed throttle. Have an assistant depress the accelerator pedal to simulate full throttle and note the indicated voltage. The TP sensor should increase its voltage output to 4.0 to 5.0 volts. If the TP sensor output voltage is incorrect, replace the TP sensor. The second test checks the TP sensor reference voltage. Backprobe the REFERENCE wire and the GROUND wire. With the ignition key turned to ON (engine not running), there should be about 5.0 volts from the PCM to the TP sensor. To replace the TP sensor, disconnect the negative battery cable, disconnect the electrical connector from the TP sensor, remove the two TP sensor retaining screws and separate the TP sensor from the throttle body. Install the new TPS leaving the mounting screws loose. Connect a voltmeter to the signal and ground wires. Rotate the sensor until the voltmeter reading is about 0.25 volt. Tighten the screws securely.

To check the throttle valve switch, begin by installing an ohmmeter to terminals I and P and check the resistance with the throttle closed. It should be O ohms. Check the mid-throttle and wide-open throttle positions. If readings are incorrect, replace the switch by removing the two screws and separating it from the throttle body, and install the new switch. Connect an ohmmeter to terminals I and P, rotating the switch until it reads O ohms, then tighten the screws.

Begin by relieving system fuel pressure, detaching the negative battery cable, and removing the air cleaner housing assembly, adapter, and gaskets.