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 MANUALSMERCURY1999TRACER LS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 1391 (ANTI-THEFT SYSTEM - PASSIVE ANTI-THEFT SYSTEM (PATS) (HYBRID))GENERAL PROCEDURESSPARE KEY PROGRAMMING - UNLIMITED KEY MODEDISABLING UNLIMITED KEY MODE
1999 Mercury Tracer LS, 4D Sedan, Standard
Disabling Unlimited Key Mode
1999 Mercury Tracer LS, 4D Sedan, StandardSECTION Disabling Unlimited Key Mode
WARNING: This page is about a different car, the 2010 Mercury Milan and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
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 IDS 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 for 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 for an IKT key).
- 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.NOTE: With the unlimited key mode turned off, a maximum of 8 keys can be programmed into the IPC using KEY PROGRAMMING USING TWO PROGRAMMED KEYS procedure. The IPC PID SPAREKEY must be enabled.
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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.