2012 Toyota Prius Plug-In

2012 Toyota Prius Plug-In Smart Key Programming Instructions Keyless Entry Remote Fob

Step-by-Step Guide Important Notice: The 2012 Prius Plug-In is equipped with a Smart Key System and does not support onboard programming for remote fobs. Programming requires specialized diagnostic tools capable of interfacing with Toyota’s immobilizer and smart entry control units.

Programming Procedure:

  • Step 1: Ensure the vehicle is in Park with the ignition OFF, and all doors are closed. Position any existing key fobs away from the vehicle to prevent interference.
  • Step 2: Using a Toyota-compatible diagnostic tool, connect to the OBD-II diagnostic port located beneath the dashboard, just below the steering column.
  • Step 3: Power on the diagnostic tool and select the Smart Key/Immobilizer programming option. Follow the prompts to begin the registration process for a new smart key.
  • Step 4: The system may prompt for verification using a registered master key. If a valid key is available, place it close to the engine start/stop button as instructed by the tool.
  • Step 5: Initiate the “Add a Key” or “All Keys Lost” procedure depending on whether a working key is present. This step will register the new smart key with the vehicle’s ECU.
  • Step 6: Once registration is completed, the system will confirm successful programming. Proceed to test the new key’s remote functions and verify the smart entry system is responsive.
  • Step 7: Exit programming mode via the diagnostic tool, then remove the OBD-II connection. Wait at least 30 seconds before attempting a full functionality check.

Additional Information:

  • The 2012 Prius Plug-In can store up to five smart keys in the vehicle’s ECU. If all keys are lost, the immobilizer system may require a security reset that takes additional time. After programming, confirm that the new key can: Lock and unlock the doors remotely Activate the panic alarm (if equipped) Start the vehicle using the push-button ignition Trigger the Smart Entry feature when approaching the vehicle For added security, keep one programmed key in a safe place in case of emergency or future replacement needs.