2019 Toyota Prius C

2019 Toyota Prius C Smart Key Programming Instructions Keyless Entry Remote Fob –

Step-by-Step Process Important Notice: The 2019 Prius C does not support onboard programming for smart key fobs. Any new or replacement remote must be programmed using a professional-grade scan tool capable of communicating with Toyota’s Smart Key system.

Programming Procedure:

  • Step 1: Ensure the vehicle is in Park, with the ignition OFF and all doors securely closed. It’s recommended to have the original key present if available.
  • Step 2: Connect a Toyota-compatible diagnostic scan tool to the OBD-II port beneath the steering column. This interface will enable secure access to the vehicle’s immobilizer and smart entry system.
  • Step 3: Initiate the programming function using the scan tool. The system may prompt for a verification code or a registered key if one is available.
  • Step 4: Begin the registration process for the new smart key. The system will communicate with the Body Control Module and the Smart Key ECU to authorize the new remote.
  • Step 5: If the vehicle currently has no working smart key, the ECU may require an initialization sequence before accepting a new fob. This may include a timed security delay or authentication step.
  • Step 6: Once the smart key has been successfully registered, the tool will display confirmation. The technician should now test the smart key’s lock/unlock features, proximity detection, and push-button ignition.
  • Step 7: Exit the programming mode using the scan tool. Disconnect from the OBD-II port and turn the vehicle OFF. Wait a few moments before verifying the full functionality of the programmed key.

Additional Information:

  • The 2019 Prius C smart key system is only available on trims equipped with push-button start. A maximum of four smart keys can be stored in the vehicle’s memory. If all keys are lost, an immobilizer reset may be required, which can take additional time and may involve identity verification. Always test the key’s remote functions, proximity unlock, and engine start after programming. It’s advisable to store a backup remote in a safe location in case of future key loss.