1. Gather Information:
Before starting the programming, collect the vehicle identification number (VIN) and the key information. You'll need both for the scan tool programming.
2. Connect Scan Tool:
Connect the scan tool or the MUT-III to the diagnostic port of your vehicle. The port is usually located under the dashboard.
3. Turn Ignition On:
Turn the ignition of the vehicle to the "ON" position, but do not start the engine.
4. Access Programming Mode:
Using the scan tool, navigate to the "Immobilizer" or "Key Programming" section in the ECU options. Follow the on-screen instructions to enter the programming mode.
5. Erase Previous Keys:
Some vehicles may require erasing previously programmed keys before adding new ones. Follow the prompts on your scan tool to erase the old keys.
6. Program New Keys:
Insert the new ignition key you want to program into the ignition switch. Follow the prompts on your scan tool to start the programming process.
7. Finish Programming:
Once the programming process is complete, your scan tool will prompt you to save the changes. Follow the instructions on the tool to save the new key into the system.
8. Test New Keys:
Turn off the ignition and then try using the newly programmed keys to turn the ignition and start the engine. If successful, the engine should start smoothly.
9. Save Changes:
After testing, use your scan tool to save the changes permanently to the vehicle's ECU.
10. Disconnect Scan Tool:
Once the programming process is complete and you've saved the changes, disconnect the scan tool from the vehicle's diagnostic port.
11. Test Again:
To ensure successful programming, try using the new keys to turn the ignition and start the engine again. Both keys should work smoothly.
Remember that programming ignition keys can vary slightly depending on the model and year of the vehicle. If you encounter difficulties or have doubts, it's advisable to consult a locksmith or a qualified automotive technician.
