2003 Toyota Tundra

2003 Toyota Tundra Keyless Entry Remote Fob Programming Guide

Important Notice: These instructions apply to factory-installed keyless entry systems. Timing is critical—each action must be completed within the specified window. If steps are not completed as directed, the system will cancel programming mode and require a full restart.

Step-by-Step Programming Instructions

  • Step 1: Prepare the vehicle. Remove the key from the ignition. Ensure the driver’s door is open and unlocked. All other doors must remain closed throughout the process.
  • Step 2: Begin initial key insertions – Complete within 5 seconds. Insert the key into the ignition (do not turn it), then remove it. Repeat: insert the key a second time (do not turn), then remove it again. These actions must be done quickly within 5 seconds.
  • Step 3: Perform door cycling – Complete within 40 seconds. Close and reopen the driver’s door once. Close and reopen the driver’s door a second time. Insert the key into the ignition again (do not turn it), then remove it.
  • Step 4: Complete final preparation steps – Complete within 40 seconds. Close and reopen the driver’s door. Repeat: close and reopen the driver’s door again. Insert the key into the ignition and leave it in place. Close the driver’s door. Turn the ignition to the ON position (do not start the engine), then return it to OFF. Remove the key from the ignition.
  • Step 5: Confirm entry into programming mode. Within 3 seconds of removing the key: The power door locks should lock and then unlock once. This indicates that the vehicle is now in programming mode. If the locks do not cycle, return to Step 1 and restart the procedure. Programming the Remote Fob(s)
  • Step 6: Program each remote – Complete within 40 seconds per remote. Press and hold the LOCK and UNLOCK buttons on the remote simultaneously for approximately 1.5 seconds. Release both buttons, then press and hold the LOCK button alone for 2 seconds. The door locks should cycle once (lock and unlock) to confirm the remote has been successfully programmed. If the locks cycle twice, the remote was not accepted. Repeat Step 6 for that remote.
  • Step 7: Program additional remotes (if needed). Repeat Step 6 for each remote you wish to add. Up to four remotes can be programmed during a single session.
  • Step 8: Exit programming mode. Open the driver’s door to complete the programming process and return the system to normal operation.
  • Final Check Step 9: Test all remotes. From outside the vehicle, test each programmed remote: Confirm the lock and unlock functions operate correctly. Check other features such as panic alarm if available.