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 MANUALSMERCURY1998MOUNTAINEER 5.0 P, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONRESTRAINTSSUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM DEACTIVATION PROCEDURESFORD MOTOR CO.SYSTEM OPERATION CHECK
1998 Mercury Mountaineer 5.0 P, AWD
System Operation Check
1998 Mercury Mountaineer 5.0 P, AWDSECTION System Operation Check
- Turn ignition switch to RUN position. Observe AIR BAG indicator with air bags installed. If AIR BAG indicator comes on for approximately 6 seconds then goes out, air bag system is functioning properly and no fault codes exist.
- If a fault code is detected in air bag system during system check, AIR BAG indicator will fail to light, stay on continuously or flash.
- The AIR BAG indicator may not start flashing for approximately 30 seconds (16 seconds on Mark VIII) after ignition switch has been turned to RUN position. This time is required for diagnostic monitor to complete test air bag system.
- If AIR BAG indicator is inoperative and a system fault exists, an audible tone of 5 sets of 5 beeps will be heard. If this occurs, air bag system service is required.
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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.