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:

Initialization
The following items must be initialized for normal system operation after such cases as the battery being reconnected, or maintenance being performed on the vehicle: Item When to initialize Power back door* After reconnecting or changing the battery ...