2005 Mercury Mountaineer

Programming Guide for 2005 Keyless Entry Remote Fob

Important Notice: The 2005 Mercury Mountaineer includes onboard programming capability for remote keyless entry fobs. All remotes must be programmed during the same session. Any remotes not included in the process will be erased and must be reprogrammed.

Programming Instructions:

  • Step 1: Sit in the driver’s seat and ensure all vehicle doors are completely closed.
  • Step 2: Have all remote fobs you intend to program ready before beginning. Each remote must be programmed during this session.
  • Step 3: Insert the key into the ignition switch. Do not start the engine.
  • Step 4: Within 10 seconds, turn the ignition from the OFF position to the RUN position eight times, ending with the key in the RUN position on the eighth cycle. This step must be performed quickly and smoothly.
  • Step 5: After the eighth cycle, the door locks will automatically lock and unlock, confirming the vehicle has entered programming mode.
  • Step 6: Within 20 seconds, press any button on the first remote fob. The door locks will cycle again to confirm that the remote has been successfully programmed.
  • Step 7: If programming a second remote, press any button on that remote within 20 seconds of the previous step. The locks will cycle again, confirming successful programming.
  • Step 8: Repeat Step 7 for any additional remotes, ensuring each one is programmed within 20 seconds of the last.
  • Step 9: Once all remotes have been programmed, turn the ignition key to the OFF position.
  • Step 10: The door locks will cycle one final time, confirming that the programming session has ended.
  • Step 11: Remove the key from the ignition and test each remote to ensure that the lock and unlock functions operate correctly.

Additional Considerations: All remotes must be programmed together. Remotes not included in the session will no longer function and must be reprogrammed. Adhere strictly to timing requirements. Exceeding the limits for ignition cycles or remote programming will cause the system to exit programming mode. Check the condition of each remote’s battery before starting the procedure to prevent programming issues.