Toyota 84540-0E010 Switch Assy, Neutral Start

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The Park/Neutral Position switch is responsible for the Park/Neutral function, backup light switch, and transmission gear position information. It sends this information to the PCM and prevents the engine from starting in any gear other than Park or Neutral. To replace the switch on 2009 and earlier four-cylinder models, raise the front of the vehicle, disconnect the electrical connector, remove the manual lever retaining nut and lock plate, remove the switch retaining bolts, and then remove the switch. For all V6 models and 2010 and later four-cylinder models, remove the engine cover, air filter housing, transaxle cable bracket clip, transaxle control cable retaining nut, wiring harness clamp, and electrical connector from the switch. Then remove the control shaft lever nut washer and lever from the switch assembly, remove the switch retaining bolts, and clean any dirt from the switch area before removing the switch. To adjust the switch on 2009 and earlier four-cylinder models, loosen the switch retaining bolts, rotate the switch until the groove and neutral basic line are aligned, and then tighten the bolts. For all V6 models and 2010 and later four-cylinder models, loosen the switch retaining bolts, rotate the switch until the protrusion on the hub is aligned with the protrusion on the switch body, and then tighten the bolts.

Even though the Society of Automotive Engineers (SAE) has recommended since 1996 that all manufacturers use the term Transmission Range (TR) sensor instead of Park/Neutral Position (PNP) switch, Toyota continues to refer to it as the PNP switch.

On early models, the TR sensor is located on the front of the transaxle, while on later models it's on the top and is referred to as the Park/Neutral switch assembly. Begin by disconnecting the cable from the negative battery terminal. Raise the vehicle and support it securely. Disconnect the electrical connector from the TR sensor and detach the shift control cable from the control shaft lever. Proceed to remove the control shaft lever from the manual valve shaft and take off the manual valve shaft nut by prying open the lockplate tabs. Take out the TR sensor mounting bolts and the TR sensor itself. Remove the air filter housing. For Toyota models, rotate the locking clip counterclockwise to remove, while on Lexus models, take off the nut and disconnect the control cable. Detach the Park/Neutral switch electrical connector, followed by the control shaft retaining nut, shaft, and locking washer. Remove the switch assembly from the manual shaft. For installation, position the TR sensor on the manual valve shaft, attach it with loose bolts, and install a new lockplate. Align the control shaft lever with the Neutral position, set the lockplate pointer accordingly, and secure the manual valve shaft nut. The rest of the procedure involves placing the manual shift lever in Neutral, setting up the Park/Neutral switch on the manual shaft, adjusting the control shaft arm, and verifying alignment. Once everything is properly aligned and secured, complete the installation by following the removal steps in reverse order.