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Inspection steps

WARNING: This page is about a different car, the 2018 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Before performing troubleshooting, check the fuse for this circuit.
  1. Clearing diagnostic code
    1. Clear the diagnostic code using the SSM4. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )
  2. DTC check
    1. Use the SSM4 to confirm that diagnostic code B1011 is not being output again. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )
    RESULT DESCRIPTION

    Result Go to
    If the diagnostic code is being output again A
    If the diagnostic code is not output B

    B: Go to "How to simulate trouble phenomenon" (Refer to PROCEDURES FOR MALFUNCTION PHENOMENON SIMULATION )

    A: Go to next step

  3. Inspection of the wiring harness and connector (BMPX voltage)
    NOTE: For inspection procedures and precautions, refer to INSPECTION PROCEDURES FOR ELECTRICAL CIRCUITS AND HOW TO PERFORM .
    1. Disconnect the instrument panel junction block ASSY connector 3C.
    2. Measure the voltage between the terminals.
    VOLTAGE SPECIFICATION

    Inspection terminals Inspection conditions Standard value
    3C-19 - Chassis ground Always 11 to 14 V
    G12594702Courtesy of SUBARU OF AMERICA, INC.

    NG: Repair or replacement of wiring harness or connector

    OK: Go to next step

  4. Inspection of the wiring harness and connector (ECM ground)
    NOTE: For inspection procedures and precautions, refer to INSPECTION PROCEDURES FOR ELECTRICAL CIRCUITS AND HOW TO PERFORM .
    1. Disconnect the main body ECM (Network gateway computer) connectors D6 and A73.
    2. Disconnect the instrument panel junction block ASSY connector 3B.
    3. Measure the resistance between the terminals.
    STANDARD VALUE RESISTANCE SPECIFICATION

    Inspection terminals Inspection conditions Standard value
    D6-1 (GND) - Chassis ground Always Less than 1 Ω
    A73-4 (GND) - Chassis ground Always Less than 1 Ω
    3B-18 - Chassis ground Always Less than 1 Ω

    NG: Repair or replacement of wiring harness or connector

    OK: Go to next step

  5. Inspection of the instrument panel junction block ASSY itself
    1. Remove the instrument panel junction block ASSY. (Refer to REMOVAL )
    2. Remove the main body ECM (network gateway computer) from the instrument panel junction block ASSY.
      G12594703Courtesy of SUBARU OF AMERICA, INC.
    3. Measure the resistance between the terminals.
    STANDARD VALUE RESISTANCE SPECIFICATION

    Inspection terminals Inspection conditions Standard value
    3C-19 - MB-32 (BMPX) Always Less than 1 Ω
    3B-18 - MB-11 (GND) Always Less than 1 Ω

    NG: Replacement of the instrument panel junction block ASSY (Refer to REMOVAL )

    OK: Go to next step

    Replacement of the main body ECM (network gateway computer) (Refer to REMOVAL )

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