Toyota 89452-33030 Sensor, Throttle Position

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On 1999 through 2003 models, the TP sensor is located on the throttle body, while on 2004 and later models, the TP sensor is an integral part of the electronic throttle body and is not removable. Disconnect the cable from the negative battery terminal. If necessary, remove the engine cover. Disconnect the TP sensor electrical connector by depressing the release tab and pulling off the connector. Then, remove the two sensor mounting screws and the sensor, this process is the same for both four-cylinder and V6 engines. When removing the TP sensor from the throttle body, especially on V6 models, be aware of limited space between the TP sensor and the firewall. If it's difficult to loosen the sensor screws, consider removing the throttle body and trying again. For installation, position the TP sensor 30 to 60-degrees counterclockwise from its installed position, then rotate it clockwise until the mounting holes in the TP sensor align with those in the throttle body. Complete the installation by following the removal procedure in reverse.

Locate the Throttle Position Sensor (TPS) on the end of the throttle shaft to check it. Verify the reference voltage located on the Powertrain Control Module (PCM). Disconnect the TPS electrical connector and touch the probes of a volt meter to terminal number 1 and ground. With the ignition key turned ON, it should be 4.5 to 5.5 volts. If it is out of range or if there is no reference voltage, have the PCM checked. Next, check the TPS signal voltage. Reconnect the electrical connector to the TPS. Back pin terminals 2 and 3 of the TPS electrical connector. With the ignition key turned to ON and the throttle fully closed, the voltage should read 0.3 to 1.0 volts. Then, slowly open the throttle to increase it. If the indicated readings are below or above the specified range, replace the TPS. To remove it, make sure the ignition key is in the OFF position. Disconnect the electrical connector from the TPS. Remove the screws that retain the TPS to the throttle body and remove the TPS. Installation is the reverse of removal.

Problems with the TPS or motor can lead to intermittent bursts of fuel from the injectors and an unstable idle, as the Powertrain Control Module (PCM) may incorrectly interpret that the throttle is moving.

Problems with the TPS or motor can lead to intermittent bursts of fuel from the injectors and an unstable idle, as the Powertrain Control Module (PCM) may incorrectly interpret that the throttle is moving.