Lexus 84540-0E010 Switch Assy, Neutral Start

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.

If the BTSI system doesn't operate as described, try adjusting it as outlined in the replacement section.

Once everything is properly aligned and secured, complete the installation by following the removal steps in reverse order.

Disconnect the cable from the negative terminal of the battery.