TSB: REVISION NOTICE June 17, 2019 Rev1: ? Applicability has been updated to include 2019 ? 2020 model year Corolla Hatchback, RAV4, and RAV4 Hybrid and 2020 model year Corolla and Corolla Hybrid vehicles. ? The Required Tools & Equipment section has been updated. Any previous printed versions of this bulletin should be discarded. The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system and to add and/or remove a key. NOTICE When performing a Smart Code Reset, ALL registered keys are erased and CANNOT be used again on ANY vehicle. For Undesignated Key Permanent Erasure utility, ONLY the keys that are NOT present will be removed. ANY keys that are NOT present can never be reused.