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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Air Bag System (Diagnostics) >> SRS Airbag System >> DTC B16F1: Passenger's Seat Belt Warning Failure >> Inspection steps

Inspection steps

CAUTION: Before performing the diagnosis, refer to the PRECAUTIONS .
  1. Check airbag harness.
    1. Turn the ignition switch to OFF, disconnect the battery ground terminal, and wait for 60 seconds or more.
    2. Disconnect the connector (D27, G19, H32) from the airbag control module.
    3. Connect the battery ground terminal and turn the ignition switch to ON.

      Criteria: The passenger's seat belt warning light blinks for 6 seconds, then goes off.

    NG: Go to step  4.

    OK: Go to next step

  2. Check airbag harness.
    1. Turn the ignition switch to OFF.
    2. Connect the connector (1AG) in the test harness AG to the connector B.
    3. Connect the connectors (7AG) and (8AG) in the test harness AG.
    4. Turn the ignition switch to ON.

      Criteria: The passenger's seat belt warning light blinks for 6 seconds, then repeats illuminating and blinking.

      G12589658Courtesy of SUBARU OF AMERICA, INC.

    NG: Go to step  3.

    OK: Go to next step

    Replace the airbag control module.

  3. Check airbag harness.
    1. Turn the ignition switch to OFF.
    2. Disconnect the connectors (7AG) and (8AG) for the test harness AG in step 2.
    3. Disconnect the connector (D7) from the combination meter.
    4. Measure the resistance between the terminals.
    STANDARD VALUE RESISTANCE SPECIFICATION

    Inspection terminals Inspection conditions Standard value
    (2AG) No. 10 - (D7) No. 38 Always Less than 10 Ω
    G12589659Courtesy of SUBARU OF AMERICA, INC.

    NG: Replace the airbag main harness along with the body harness, or repair the bulkhead harness and the instrument panel harness.

    OK: Go to next step

    Replacement of the combination meter

  4. Check airbag harness.
    1. Turn the ignition switch to OFF.
    2. Connect the connector (1AG) in the test harness AG to the connector B.
    3. Measure the resistance between the connector (2AG) in the test harness AG and the chassis ground.
    STANDARD VALUE RESISTANCE SPECIFICATION

    Inspection terminals Inspection conditions Standard value
    (2AG) No. 10 - chassis ground Always 1 MΩ or more
    G12589660Courtesy of SUBARU OF AMERICA, INC.

    NG: Replace the airbag main harness along with the body harness, or repair the bulkhead harness and the instrument panel harness.

    OK: Go to next step

    Replacement of the combination meter

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