The ADC2021 adds to Advanced Diagnostics' extensive coverage of Toyota models, allowing programming of replacement proximity keys for popular models like the RAV4 and the Yaris equipped with a BA system and DST-AES or Hitag-AES transponders.

The ADC2021 bypass cable connects directly to the immobilizer control unit (Certification Unit) and then works with the Smart Pro and Advanced Diagnostics ADS2328 software to duplicate replacement keys. If all keys are lost, an emulator cable (ADC2015 or ADC2020) is needed to substitute the function of a working key.