TOYOTA 2011 Sienna - Manual (Page 200)

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1-6. Theft deterrent system
1
Before driving
CAUTION
■ Certifications for the immobilizer system
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
NOTICE
■ To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper
operation of the system cannot be guaranteed.