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 MANUALSMERCURY1993SABLE GS, 4D SEDAN, 3.0 U, AXODEREPAIR AND DIAGNOSIS (SINGLE PAGE)RESTRAINTSAIR BAG, SRSAIR BAG RESTRAINT SYSTEMDIAGNOSTIC TESTSCODE 42, HIGH RESISTANCE OR OPEN FRONT IMPACT SENSOR CIRCUITPOSSIBLE CAUSES
1993 Mercury Sable GS, 4D Sedan, 3.0 U, AXODE
Possible Causes
1993 Mercury Sable GS, 4D Sedan, 3.0 U, AXODESECTION Possible Causes
Code 41 will set if there is an open in circuit No. 619 or 625. Code 41 will also set if there is an open left impact sensor (center front sensor on Sable and Taurus).
- Verify Condition - Turn ignition on. Check for fault codes. If Code 42 is flashing, go to step 2). If Code 42 is not flashing, check connectors, wiring and crimps for intermittent problem. DO NOT proceed with diagnostic test until code is flashing. Failure to do so will result in needless replacement of diagnostic monitor.
- Deactivate System - Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM. Set ohmmeter to AUTO or 200-ohm scale. Measure resistance between terminals No. 18 (Pink/White wire) and No. 6 (Yellow/Light Green wire) of diagnostic monitor connector. If resistance is less than 2 ohms, replace diagnostic monitor. If resistance is more than 2 ohms, go to step 3).
- Check Front Impact Sensor Resistance - Disconnect left impact sensor (center front sensor on Sable and Taurus). Measure resistance between Pink/White wire and Yellow/Light Green wire of sensor connector. If resistance is less than 2 ohms, locate and repair open in Pink/White wire or Yellow/Light Green wire. Also, check all connectors, terminals and crimps. Repair as necessary. If resistance is more than 2 ohms, replace impact sensor.
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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.