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 MANUALSMERCURY1999MYSTIQUE GS, 2.0 3, AUTOMATICREPAIR AND DIAGNOSISGENERAL INFORMATIONCOMPUTER RELEARN PROCEDURESCOMPUTER RELEARN PROCEDURESCONTOUR & MYSTIQUEKEY PROGRAMMING - USING 2 PROGRAMMED KEYS
1999 Mercury Mystique GS, 2.0 3, Automatic
Key Programming - Using 2 Programmed Keys
1999 Mercury Mystique GS, 2.0 3, AutomaticSECTION Key Programming - Using 2 Programmed Keys
- Insert the first programmed ignition key into ignition lock cylinder. Turn ignition switch from LOCK to RUN position (ignition switch must stay in RUN position for one second). Turn ignition switch to LOCK position and remove ignition key from ignition lock cylinder.
- Within 5 seconds of turning ignition switch to LOCK position, insert second programmed ignition key into ignition lock cylinder. Turn ignition switch from LOCK to RUN position (ignition switch must stay in RUN position for one second). Turn ignition switch to LOCK position and remove second ignition key from ignition lock cylinder.
- Within 5 seconds of turning ignition switch to LOCK position, insert a NEW unprogrammed ignition key into ignition lock cylinder. Turn ignition switch from LOCK to RUN position (ignition switch must stay in RUN position for one second). Turn ignition switch to LOCK position and remove ignition key from ignition lock cylinder. The NEW ignition key should now be programmed. To program additional key(s), repeat key programming procedure from step 1).
NOTE:
This procedure is used when customer needs extra keys programmed and 2 programmed keys are not available, but system has 2 ignition keys programmed. A maximum of 8 keys can be programmed. If 8 keys are already programmed, this procedure will not allow any more keys to be programmed. The number of programmed keys can be determined by accessing PCM PID NUMKEYS with NGS tester.
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.