Toyota Highlander Service Manual: Sliding roof/convertible

Engine immobilizer system

REGISTRATION 1. DESCRIPTION OF CODE REGISTRATION (a) When adding master keys and sub-keys (additional registration).  Register the key code (immobilizer code) in the transponder key ECU. ...

Sliding roof system

...

More about Toyota Highlander:

Engine (ignition) switch (vehicles without a smart key system)
Starting the engine Check that the parking brake is set. Check that the shift lever is set in p. Firmly depress the brake pedal. Turn the engine switch to the “start” position and start the engine. Changing the engine switch positions “Lock” the steering wheel is locked ...