Lexus 84540-0E010 Switch Assy, Neutral Start

2015 and later RX 330 models added two solenoid systems. A key lock system and a Shift Lock Module near the brake pedal and transmission sensor control the shift lock solenoid under the console. From 2015 onwards the traditional shift lock solenoid and module have been replaced by a steering lock electronic control unit and its connected actuator. When you switch the key to LOCK the shift lock module blocks movement from PARK until you press the brake pedal first. You must also return the lever to PARK before locking the ignition again. Check that you must press the brake pedal to move the shift lever out of PARK and that the ignition key can only be pulled from the PARK position. Also ensure the ignition key changes to LOCK from OFF only in PARK and the shift lever cannot move from PARK when the ignition key is in OFF, RUN, START, ACC or LOCK mode. Our team will need to make repairs when any problem occurs with BTSI system functions. Unplug the negative battery cable to get to the key lock solenoid under the steering column trim. Disconnect the solenoid and unscrew its mounting screws afterwards. To get to the shift lock module want you to disconnect all the parts that sit above: shift lever assembly, console bulb connector, position indicator slide cover, and lower housing before separating the harness pins and unplugging the module from its base. When the transmission range sensor detects Park/Neutral position it blocks engine start and prevents turning the key in other gears. Adjustments are necessary when the engine starts unexpectedly in gear other than Park or Neutral. When BTSI stops working you can take control of the vehicle by pressing the override button next to the shift lever but only when ignition is in the LOCK position. Beginning with 2015 models you must pry open a protective cap to use this feature.

For Lexus RX300, RX330, and RX350 models, begin by disconnecting the cable from the negative battery terminal. Raise the vehicle and secure it on jackstands. Disconnect the electrical connector from the TR sensor, then remove the nut securing the shift control cable to the control shaft lever and disconnect the cable. Remove the nut and washer securing the control shaft lever to the manual valve shaft, then pry open the lockplate tabs and remove the manual valve shaft nut. Next, remove the TR sensor mounting bolts and take out the TR sensor. Remove the air filter housing, then disconnect the control cable from the control shaft. Disconnect the Park/Neutral switch electrical connector, remove the control shaft retaining nut, shaft, and locking washer, and lift the switch assembly off the manual shaft. For installation, slide the TR sensor onto the manual valve shaft and loosely install the mounting bolts. Install a new lockplate and the manual valve shaft nut, then install the control shaft lever on the manual valve shaft, turning it counterclockwise through the gears until it stops, then clockwise two clicks to reach the Neutral position. Align the pointer on the lockplate with the Neutral basic line, install a new lockplate, tighten the manual valve shaft nut securely, and bend the lockplate tabs against the nut. Place the manual shift lever in the Neutral position, install the Park/Neutral switch onto the manual shaft, and temporarily install the mounting bolts. Place the control shaft arm onto the manual shaft, rotate it clockwise until it stops, then counterclockwise two clicks. Verify the pointer on the lockplate aligns with the neutral basic line and tighten the bolts securely. Install the control shaft, washer, and nut, tightening the nut securely. Rotate the control shaft clockwise until it stops, then counterclockwise two clicks, and install the control cable and retaining clip. Complete the installation by reversing the removal steps.

1. Remove the shift lever assembly. 2. Remove the console bulb connector. 3. Remove the position indicator slide cover. 4. Remove the position indicator lower housing. 5. Separate the harness pins from the main connector. 6. Remove the shift lock module mounting screws and separate the shift lock module from the assembly. 7. Installation is the reverse of removal.