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Inspection steps

WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Before performing the diagnosis, refer to the PRECAUTIONS .
  1. Check DTC
    1. Read the DTC for the occupant detection system.

      Criteria: No other DTC is detected.

      NG: Perform the diagnosis according to the DTC.

      OK: Go to Next Step

  2. Check poor contact of connectors.
    1. Check for poor contact of the connectors between the occupant detection control module and the airbag control module.

      Criteria: No fault is found.

      NG: Connect the connectors properly. In the case that the fault cannot be corrected, replace the airbag rear harness along with the body harness, or replace the front seat cushion ASSY RH.

      OK: Go to Next Step

  3. Check airbag rear harness.
    1. Turn the ignition switch to OFF, disconnect the battery ground terminal, and wait for 60 seconds or more.
    2. Disconnect the connector (G2) under the passenger's seat.
    3. Disconnect the connector B from the airbag control module, and connect the connector (1AH) in the test harness AH.
    4. Connect the connector (2AH) in the test harness AH and the connector (1AG) in the test harness AG.
    5. Measure the resistance between the terminals.
      NOTE: Connect the test harness AS to the connector (G2) and touch the test harness with the tester.
      RESISTANCE

      Inspection terminals Inspection conditions Standard value
      (G2) No. 2 - (5AG) No. 16 Always Less than 10 Ω
      (G2) No. 3 - (5AG) No. 5 Always Less than 10 Ω
      Fig 1: Checking Airbag Rear Harness
      G08557667Courtesy of SUBARU OF AMERICA, INC.

      Criteria: The same DTC is not displayed.

      NG: Replace the airbag rear harness along with the body harness.

      OK: Go to Next Step

  4. Check airbag rear harness.
    1. Measure the resistance between the terminals.
      RESISTANCE

      Inspection terminals Inspection conditions Standard value
      (5AG) No. 5 - chassis ground Always 1 MΩ or more
      (5AG) No. 16 - chassis ground Always 1 MΩ or more
      (5AG) No. 5 - (5AG) No. 16 Always 1 MΩ or more

      NG: Replace the airbag rear harness along with the body harness.

      OK: Go to Next Step

  5. Check occupant detection harness.
    1. Turn the ignition switch to ON.
    2. Measure the voltage between the terminals.
      VOLTAGE

      Inspection terminals Inspection conditions Standard value
      (G2) No. 1 - chassis ground IG ON 10 V or more

      NG: Replace front seat cushion ASSY RH.

      OK: Check the battery voltage and the fuses. If there is no faulty, replace the airbag rear harness along with the body harness.

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