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.
Disabling Unlimited Key Mode
2009 Mercury Mariner Hybrid, AWDSECTION Disabling Unlimited Key Mode
NOTE:
By disabling the unlimited key mode, the previous access code no longer operates the vehicle.
- From the scan tool, enter TOOLBOX. Select BODY-SECURITY-PATS Functions and follow the on-screen instructions to ENTER SECURITY ACCESS. For additional information, refer to ANTI-THEFT SECURITY ACCESS .
- Select: "unlimited key mode OFF" and follow the IDS on-screen instructions.
- Select: "Ignition Key Code Erase" and follow the IDS on-screen instructions.
- Disconnect the scan tool and turn the ignition switch to OFF.
- Insert the first PATS key into the ignition lock cylinder and turn the key to the ON position for 3 seconds (6 seconds if it is an IKT key).
- Remove the first PATS key from the ignition lock cylinder.
- Insert the next PATS key into the ignition lock cylinder and turn the key to the ON position for 3 seconds (6 seconds if it is an IKT key).
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NOTE: With the unlimited key mode turned off, a maximum of 8 keys can be programmed into the IC using the Key Programming Using Two Programmed Keys procedure. The PID SPAREKEY must be enabled.
If it is desired to program additional key(s), refer to KEY PROGRAMMING USING TWO PROGRAMMED KEYS for each additional key that needs to be programmed. The PID SPAREKEY must be enabled.
RENDER: 1.0x
NO RELATED
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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.