Before Starting Troubleshooting

Even if any part must be replaced as the result of troubleshooting, do not use an airbag part or pretensioner part from other vehicles. Always replace the defective parts with new parts.
When checking the airbag system, be sure to use a digital circuit tester. Use of an analog circuit tester may cause the airbag to activate erroneously due to a minimal current inside tester.

Fig 1: Caution For Checking Airbag System Module Using Digital Circuit Tester
Courtesy of SUBARU OF AMERICA, INC.
Do not allow water or oil to come in contact with the connector terminals. Also, do not touch the connector terminals directly.

Fig 2: Caution For Touching Airbag Module Connector Terminals
Courtesy of SUBARU OF AMERICA, INC.
When checking, use a test harness (1). Damage to connector terminal causes malfunction. Do not directly put the tester probe on airbag connector terminal.

Fig 3: Caution For Checking Airbag System Connector Terminal
Courtesy of SUBARU OF AMERICA, INC.
Do not check the continuity of the airbag modules and pretensioners.