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 MANUALSMERCURY2000MYSTIQUE GS, 2.0 3, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONCOMPUTER RELEARN PROCEDURESRELEARN PROCEDURESPASSIVE ANTI-THEFT SYSTEM (PATS)NOTES
2000 Mercury Mystique GS, 2.0 3, Automatic
Passive Anti-Theft System (Pats): Notes
2000 Mercury Mystique GS, 2.0 3, AutomaticSECTION Notes
Various models use different systems. To identify which programming procedures to use, identify which control module is used for PATS system. See PATS SYSTEM IDENTIFICATION table.
PATS SYSTEM IDENTIFICATION
| Application | System Type | Control Module |
|---|---|---|
| Continental | "C" | Instrument Cluster Module |
| Contour | "E" | PCM |
| Cougar | "E" | PCM |
| Crown Victoria | "B" | PATS Module |
| Excursion | "B" | PATS Module |
| Expedition | "C" | Instrument Cluster Module |
| Explorer | "B" | PATS Module |
| F150/F350 Pickup | "C" | Instrument Cluster Module |
| Focus | "E" | PCM |
| Grand Marquis | "B" | PATS Module |
| LS | "C" | Instrument Cluster Module |
| Mountaineer | "B" | PATS Module |
| Mustang | "C" | Instrument Cluster Module |
| Mystique | "E" | PCM |
| Navigator | "C" | Instrument Cluster Module |
| Ranger | "B" | PATS Module |
| Sable | "E" | PCM |
| Taurus | "E" | PCM |
| Town Car | "C" | Instrument Cluster Module |
| Windstar | "C" | Instrument Cluster Module |
NOTE:
This procedure is used when a customer needs keys programmed into system and does not have 2 programmed ignition keys available, or when programmed ignition keys have been lost and/or ignition switch assembly has been replaced. This procedure will erase all programmed ignition keys from memory and prevent vehicle from starting until 2 keys have been programmed. Ignition keys must have correct mechanical key cut for vehicle and must be an encoded key. If additional key(s) are to be programmed, perform KEY PROGRAMMING - USING 2 PROGRAMMED KEYS (TYPE "B"). If remaining keys are with customer and not with vehicle, instruct customer to see owner's manual to program spare key(s).
RENDER: 1.0x
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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.