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 MANUALSSAAB1994900 BASE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)RESTRAINTSAIR BAG, SRSAIR BAG RESTRAINT SYSTEMDIAGNOSISTEST 8FAULT CODE B1331
1994 Saab 900 Base, Automatic
Fault Code B1331
1994 Saab 900 Base, AutomaticSECTION Fault Code B1331
- Record fault code, then erase code. Turn ignition off, then on again. Wait at least 40 seconds with ignition on. If code reoccurs, go to next step. If code does not reoccur, leave ignition on and move steering wheel, wiggle connectors and wires to check for loose contacts. If SRS light starts to flash again and code reoccurs, go to next step.
- Install Reference Resistor (84 71 153) to driver-side and passenger-side air bag module. See REFERENCE RESISTOR INSTALLATION under SELF-DIAGNOSTIC SYSTEM . Turn ignition on and erase fault code. Turn ignition off, then on again. Wait 40 seconds with ignition on. If fault code reoccurs, go to next step. If fault code does not reoccur, driver-side air bag module is defective.
- Turn ignition off. Remove reference resistor from driver-side air bag. Disconnect control module connector. Connect breakout box to harness side of connector. Turn ignition on and measure voltage between breakout box pin No. 6 and ground, and between pin No. 14 and ground. If battery voltage is present in either test, go to next step. If battery voltage is not present in either test, go to step 5).
- Turn ignition off. Disconnect driver-side air bag connector. Turn ignition on and measure voltage between breakout box pin No. 16 and ground, and between pin No. 14 and ground. If battery voltage is not present, replace clockspring. If one test shows battery voltage, repair wiring between air bag module connector and control module. Go to step 7).
- Turn ignition off. Measure continuity between breakout box pin No. 16 and ground, and between pin No. 14 and ground. If low resistance is present in either test, go to next step. If both tests show high resistance, go to step 7).
- Disconnect driver-side air bag connector. Measure resistance between breakout box pin No. 16 and ground, and between pin No. 14 and ground. If both tests show high resistance, replace clockspring. If one test shows low resistance, repair wiring between driver-side air bag connector and control module connector.
- Reconnect all connectors. Turn ignition on and erase fault code. Turn ignition off, then on again. Wait at least 40 seconds with ignition on. If code reoccurs, go to SRS LIGHT COMES ON AFTER IGNITION ON .
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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.