After 3-5 seconds remove the second key from ignition. The Security light may blink indicating it has accepted the key. Insert the second transponder key into ignition lock cylinder for registration DO NOT TURN ON. Security light should remain on indicating you're still in programming mode.ģ. After 3-5 seconds remove the first key from the ignition. Insert the first transponder key into ignition lock cylinder for registration DO NOT TURN ON. The security light should illuminate and remain on.Ģ. Briefly insert any key into ignition lock cylinder and remove immediately. When reconnected to the car, the ECU will be in auto-programming mode and will accept new keys as per the procedure below:ġ. Here’s the setup, with the computer connected to the ECU via the EEPROM circuit on a prototype breadboard. If you do have problems reading and writing from the chip, you have to short the crystal on the board. However the clip doesn’t have a good grip on the SMD chip so I chose to solder wires directly to the leads of the chip. Using a test clip helped a lot during prototyping. Note: This is the same circuit for programming the odometer’s EEPROM: To connect the 8-pin EEPROM chip to the computer you'll either have to solder hook-up wires to the pins or get a Test Clip for onboard programming. The components required are fairly basic, three 4.7K ohm resistors, three 5V zener diodes, and a computer with a serial port. In my case, I made my own, using this EEPROM circuit. You can either buy a USB programmer from eBay or make your own to communicate to the serial port. The Lincoln Mark VIII is the only Ford vehicle in the United States that used the Steering Column Illumination Module or SCIL system and a typically un-readable Motorola Chip inside of the key.įor more on-board key programming procedures like these visit is where you need to get a programmer to connect the chip to your PC. Second Note: Although it is not on the Ford PATS 1 system list, the 1997 Lincoln Mark VIII has been reported to have the exact same key learning procedures. It is easy to get distracted while doing procedures like this, we advise you to set a timer (like the one that is standard on most smart phones) for 15 minutes to alert you so you do not miss your opportunity and have to start all over again. It is strongly advised to connect to a secondary power source such as a trickle charger to power the battery for this procedure. Note: This process takes a minimum of 45 minutes to complete. All other keys have been erased out of the system. Turn the key to the OFF position and back to ON and verify that the security light goes out.
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