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 MANUALSFORD1997MUSTANG GT, 2D CONVERTIBLE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)RESTRAINTSAIR BAG, SRSSUPPLEMENTAL INFLATABLE RESTRAINT SYSTEMDIAGNOSTIC TESTSDTC B1914 - FRONT IMPACT SENSOR SHORTED TO GROUNDTEST PROCEDURE
1997 Ford Mustang GT, 2D Convertible, Standard
Test Procedure
1997 Ford Mustang GT, 2D Convertible, StandardSECTION Test Procedure
- Verify Condition
Connect NGS tester to DLC. Perform ON-DEMAND SELF-TEST . If DTC B1914 is retrieved, go to next step. If DTC B1914 is not retrieved, go to step 5). - Identify Shorted Circuit
Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM . Disconnect diagnostic monitor. Using an ohmmeter set to 200k/ohm scale or Auto, measure resistance between terminal C276-18, circuit 57 (Black wire) of air bag diagnostic monitor and terminal C276-15, circuit 619 (Pink/White wire) and C277-23, circuit 625 (Yellow/Light Green wire) of left front impact sensor, and terminal C276-16, circuit 617 (Pink/Orange wire) and C277-24, circuit 624 (Yellow/White wire) of right front impact sensor. If one or more resistance reading is not infinite, go to next step. If all resistance readings are infinite (open), replace diagnostic monitor. See DIAGNOSTIC MONITOR under REMOVAL & INSTALLATION. Reconnect, verify, and reactivate system. See DISABLING & ACTIVATING AIR BAG SYSTEM . - Determine If Sensor Or Wire Is Shorted
Disconnect impact sensor where resistance reading was not infinite in step 2). Measure resistance across normally open contacts of front impact sensor at sensor connector. If resistance reading is infinite (open), go to next step. If resistance reading is not infinite, replace front impact sensor. See FRONT IMPACT SENSORS under REMOVAL & INSTALLATION. Reconnect system and go to step 7). - Check For Shorted Sensor Circuit
Disconnect air bag diagnostic monitor. Using an ohmmeter connected to good ground, measure resistance to ground at terminal C276-15, circuit 619 (Pink/White wire) and C277-23, circuit 625 (Yellow/Light Green wire) of left front impact sensor, or terminal C276-16, circuit 617 (Pink/Orange wire) and C277-24, circuit 624 (Yellow/White wire) of right front impact sensor. If resistance is less than 1 Mohm, repair circuit 619 (Pink/White wire), circuit 617 (Pink/Orange wire), 624 (Yellow/White wire), or 625 (Yellow/Light Green wire). Reconnect, verify, and reactivate system. Go to step 7). If resistance is not as specified, repair short between circuit 619 (Pink/White wire), 625 (Yellow/Light Green wire), 620 (Pink/Light Blue wire), 617 (Pink/Orange wire), or 618 (Pink/Light Green wire). Reconnect, verify, and reactivate system. See DISABLING & ACTIVATING AIR BAG SYSTEM . Go to step 7). - Check For DTC Service
Deactivate system. See COMPLETE SYSTEM DEACTIVATION . If DTC B1914 has just been repaired, check fuse 4 (10-amp). Do not use substitutions. Reconnect system and go to step 7). If DTC B1914 has not just been repaired, go to next step. - Check Front Impact Sensors
Inspect circuits 617 (Pink/Orange wire), 624 (Yellow/White wire), 619 (Pink/White wire) and 625 (Yellow/Light Green wire) for pinched or chafed wires or other problems. If problems are noted, replace front impact sensor. Check fuse 4, go to next step. If no problems are noted, reexamine fault code and look for causes of intermittent shorts or resistance to ground. Attempt to recreate hard faults by driving vehicle, flexing wiring harnesses, etc. Repair intermittent problems and go to next step. - Check For Other DTCs
Connect NGS to DLC. If other DTCs are retrieved go to proper DTC test. If no other DTCs are retrieved, reactivate system and clear all DTCs. See DISABLING & ACTIVATING AIR BAG SYSTEM .
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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.