Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLINCOLN2008NAVIGATOR 4WD V8-5.4LREPAIR AND DIAGNOSISBODY AND FRAMELOCKSKEYLESS ENTRYTESTING AND INSPECTIONSPARE KEY PROGRAMMINGUSING DIAGNOSTIC EQUIPMENT
2008 Lincoln Navigator 4WD V8-5.4L
Using Diagnostic Equipment
2008 Lincoln Navigator 4WD V8-5.4LSECTION Using Diagnostic Equipment
SPARE KEY PROGRAMMING - USING DIAGNOSTIC EQUIPMENT
Special Tool(s)
NOTE:
- This procedure is used when a customer needs to have an additional key programmed into the vehicle without erasing stored key codes, but does not have 2 programmed keys available. This procedure is also useful when attempting to determine if an ignition key is damaged, as a new key can be installed without erasing keys or without having 2 programmed keys available.
- Before programming, the new key must have the correct mechanical cut for the ignition lock cylinder.
- If 8 keys are already programmed, this procedure does not allow any more passive anti-theft system (PATS) keys to be programmed. The number of keys that are programmed into the PATS can be determined by viewing the IC (IC) PID N_KEYCODE.
1. Turn the unprogrammed PATS key from the OFF position to the ON position.
2. From the scan tool, follow the on-screen instructions to ENTER SECURITY ACCESS.
3. NOTE: Make sure the selection made is "PROGRAM". If the "ERASE" selection is made, all of the keys will be erased from the system.
From the scan tool menu select: "Program additional ignition key" and press the tick mark.
4. Turn the key to the OFF position and disconnect the scan tool.
5. Start the vehicle with the new PATS key. The vehicle will now start with the new PATS key and also with the original PATS keys.
Special Tool(s)
Special Tool(s):
NOTE:
- This procedure is used when a customer needs to have an additional key programmed into the vehicle without erasing stored key codes, but does not have 2 programmed keys available. This procedure is also useful when attempting to determine if an ignition key is damaged, as a new key can be installed without erasing keys or without having 2 programmed keys available.
- Before programming, the new key must have the correct mechanical cut for the ignition lock cylinder.
- If 8 keys are already programmed, this procedure does not allow any more passive anti-theft system (PATS) keys to be programmed. The number of keys that are programmed into the PATS can be determined by viewing the IC (IC) PID N_KEYCODE.
1. Turn the unprogrammed PATS key from the OFF position to the ON position.
2. From the scan tool, follow the on-screen instructions to ENTER SECURITY ACCESS.
3. NOTE: Make sure the selection made is "PROGRAM". If the "ERASE" selection is made, all of the keys will be erased from the system.
From the scan tool menu select: "Program additional ignition key" and press the tick mark.
4. Turn the key to the OFF position and disconnect the scan tool.
5. Start the vehicle with the new PATS key. The vehicle will now start with the new PATS key and also with the original PATS keys.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.