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:

Terminals of ECU
1. CHECK SLIDING ROOF DRIVE GEAR SUB- ASSY (SLIDING ROOF ECU) (a) Disconnect the sliding roof ECU connector, and check the voltage or continuity of each terminal of the wire harness side connector. If the result is not as specified, there may be a malfunction on the wire harness. ...