Subaru 31918AA090 Inhibitor Switch Neutral Safety

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Disconnect the cable from the negative terminal of the battery, put the shift lever in Neutral, raise the vehicle and support it securely on jackstands, remove the center exhaust pipe section and on later models the front part of the exhaust system, disconnect the electrical connector from the TR sensor, disconnect the shift cable from the manual lever and from the transaxle, remove the TR sensor mounting bolts, shift the manual lever to the Park position and remove the TR sensor, drive out the roll pin from the end of the shift shaft, slide the shift arm off of the shaft, slide the sensor off of the shaft, place the sensor in position and loosely install the TR sensor bolts, insert a 5/32-inch drill bit through the alignment holes in the ends of the manual and sensor levers, and into the alignment hole in the sensor body, and tighten the sensor bolts securely. Installation is the reverse of removal.

The vehicle needs to be raised and securely supported on jackstands. On turbo models, the inter cooler needs to be removed.

Raise the vehicle and support it securely on jackstands.

After raising the vehicle and securely placing it on jackstands, remove the center exhaust pipe section. On later models, you might also have to remove the front part of the exhaust system.

Put the transaxle into reverse and check for continuity (zero or low resistance) for the back-up light switch.

Replace it by unscrewing and removing the old switch, installing the new switch (make sure the washer is installed) and tightening it to the torque. Then plug in the electrical connector and verify that the new switch works properly.