Steering Columns: Other Subaru SVX I

AIR BAG MODULE

The air bag module is located in center of the steering wheel and contains an air bag and inflator. When front impact sensor(s) close, signaling a front impact, the ignitor causes ignition of inflator gas generant. This ignition reaction combusts sodium azide/copper oxide gas generant in the inflator, producing nitrogen gas, which inflates air bag.

When air bag deploys, tear seams molded into steering wheel trim cover separate, allowing inflation of air bag assembly. Air bag module is not serviceable and must be replaced as complete assembly.

CLOCKSPRING

The steering column contains a clockspring contact assembly to transfer electrical signals from steering column wiring harness to air bag module. Clockspring is mounted to steering column between column and steering wheel.

AIR BAG ELECTRICAL SYSTEM

SRS is powered directly from battery and can function with ignition switch in any position, including OFF and LOCK. System can also function when driver and passenger seats are unoccupied. The 3 main functions performed by electrical subsystem are as follows: detecting an impact, switching electric power to inflator for air bag, and monitoring readiness of SRS system.

Scheme 1

AIR BAG SERVICE PRECAUTIONS

Observe following precautions when working with air bag systems

1. Disable SRS before servicing any SRS or steering column component. Failure to disable system could result in accidental air bag deployment and possible personal injury. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(ref-35099-S35610508142001011600000) .
2. Wait about 10 minutes after disconnecting negative battery cable before servicing SRS. System reserve capacitor maintains SRS voltage for about 10 minutes after battery is disconnected. Servicing SRS before 10 minutes may cause accidental air bag deployment and possible personal injury.
3. DO NOT use air bag parts from another vehicle. Replace air bag parts with new parts.
4. If steering wheel pad is dropped, or if there are cracks, dents or other defects in the case or connector, replace part.
5. DO NOT expose steering wheel pad to temperatures greater than 194°F (90°C).
6. Information labels are attached to air bag components. Follow all notices on labels.
7. After work on SRS is completed, check AIR BAG warning light to ensure system is functioning properly. See «SYSTEM OPERATION CHECK»(ref-35099-S00610680062001011600000) .
8. Always wear safety glasses when servicing or handling an air bag.
9. DO NOT check air bag module continuity with air bag removed from vehicle.
10. When placing a live air bag on a bench or other surface, always face air bag and trim cover up, away from surface. This will reduce motion of module if it is accidentally deployed.
11. When carrying a live air bag module, point trim cover away from your body to minimize injury in case of accidental deployment.
12. If SRS is not fully functional for any reason, vehicle should not be driven until system is repaired and again becomes operational. DO NOT remove bulbs, modules, sensors or other components or in any way disable system from operating normally. If SRS is not functional, park vehicle until it is repaired and functions properly.

DISABLING & ACTIVATING AIR BAG SYSTEM

To disable SRS, turn ignition switch to OFF position. Disconnect and shield negative then positive battery cables. After battery cables have been disconnected, wait about 10 minutes before servicing SRS. To activate SRS, reconnect positive and then negative battery cables. Check AIR BAG warning light to ensure system is functioning properly. See SYSTEM OPERATION CHECK .

Ensure wheels are in a straight-ahead position. With air bag module and steering wheel removed, turn clockspring pin clockwise until it stops. (Scheme 2) Then turn clockspring pin counterclockwise approximately 2 1/2 turns until word CENTER appears in indicator. Align arrow marks. (Scheme 2) Clockspring is now centered. Install steering wheel and air bag module. Turn steering wheel fully in both directions to ensure steering is normal.

Scheme 2