For 1990-2009 cars only
- Install the immobilizer control unit cartridge in the scan tool.
- Turn OFF the ignition.
- Connect the scan tool.
- Turn ON the ignition with the key to be coded.
- Enter the 4-digit password that enables service personnel to use the scan tool for key coding.
- A lost key can be deleted only by deleting all keys and reauthorizing the remaining keys as new keys. If a key is lost, go to the next step. If no keys have been lost but an additional key is desired, go to step 8.
- Use the scan tool command DELETE ALL KEY CODES.
- Use the scan tool command AUTHORIZE ONE ADDITIONAL KEY.
- Repeat steps 4, 5, and 6 until the immobilizer control unit has recorded all of the new keys or, after a deletion, has reauthorized all of the remaining keys. The immobilizer control unit can record a maximum of 5 keys.
- Return the system to the normal mode.
- Turn OFF the ignition.
- Turn ON the ignition.
- Crank to start the engine.
