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

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More about Toyota Highlander:

Folding down the third seats
Before folding down the third seats Stow the third seat belt buckles. Pass the outer seat belts through the seat belt hangers and secure the seat belt plates. This prevents the shoulder belts from being damaged. Make sure that the seat belts are removed from the hangers ...