Toyota provides direct assistance in the event you are having difficulties with your TIS account. Customer support representatives are available at the toll-free number below to answer your questions on the use and operation of TIS.
1-877-762-7666 | 8:00AM to 7:00PM Central Time | Monday through Friday
Please note this is not a technical assistance hotline. TIS customer service representatives will not comment on questions related to any vehicle or service operation/repair issues.
Email Support Form:
Source: https://techinfo.toyota.com/techInfoPortal/appmanager/t3/ti?_nfpb=true&_pageLabel=ti_contact_us
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