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Inspection steps

CAUTION:
  • The entry & start system has functions that use the CAN communication. Before performing troubleshooting, perform the inspection in "How to troubleshoot", and check that there are no communication problems. (Refer to HOW TO PROCEED WITH TROUBLESHOOTING )
  • Before replacing the collation ECM (smart key ECM ASSY) or the steering lock actuator ASSY (steering lock ECM), refer to "entry & start system (entry function)". (Refer to ENTRY & START SYSTEM (ENTRY FUNCTION) )
  • After repair, perform the [DTC output confirmation operation], and check that the DTC is not output again.
  • Before performing the following inspection steps, check the fuses related to this system.
NOTE: If the entry key indicator of the combination meter ASSY is lit up green, there is a possibility the steering lock bar is stuck.
  1. DTC check (LIN communication system)
    1. Check the output of diagnostic codes from the smart key ECM ASSY (collation ECM).

      Criteria: The diagnostic code B2785, which indicates a LIN communication malfunction, is not output.

      NOTE:
      • If the steering lock is being locked/unlocked, the engine switch will not turn on (IG), and you cannot start the engine.
      • If you cannot use the LIN communication, you cannot lock/unlock the steering lock.

      OK: Go to next step

      NG: See the diagnostic code B2785 (Refer to DTC B2785 LIN COMMUNICATION ERROR ).

  2. Reading the values using the SSM4 (steering unlock switch)
    1. Connect the SSM4 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM4.
    4. Enter the following menus: [Keyless Access(Power Supply ECM)] →[Data monitor]
    5. Based on the contents of the SSM4 display, read the [Data monitor].
      RANGE DESCRIPTION - POWER SOURCE CONTROL

      Tester display Measurement items/range Normal condition Notes for diagnosis
      [Steering unlock SW] Status of the steering lock sensor output from the steering lock actuator ASSY/OFF or ON OFF: The steering is locked. ON: The steering is unlocked.  
      • When the shift lever is in P(1), if a door is opened or closed with the engine switch off, the steering is locked.
      • If the electrical key transmitter SUB-ASSY is in the vehicle interior, and the engine switch is on (ACC) or on (IG), the steering is unlocked.
      • If the steering unlock signal is off, the engine will not start.
      (1) for automatic transmission
      RESULT DESCRIPTION

      Result Go to
      The [Data monitor] items do not change A
      The [Data monitor] items change B
      1. Go to next step
      2. Replacing the steering lock actuator ASSY (steering lock ECM)
  3. Checking the harnesses and connectors (power supply) (Refer to DTC B2274 ACC CIRCUIT ABNORMAL )

    OK: Go to next step

    NG: Repair or replacement of the harnesses or connectors of the circuits that connect to the power source

  4. Checking the harnesses and connectors (grounding) (Refer to DTC B2274 ACC CIRCUIT ABNORMAL )

    OK: Go to next step

    NG: Repair or replacement of the harnesses or connectors

  5. Inspection of the steering lock actuator ASSY (steering lock ECM)
    1. Reconnect the D59 connector of the steering lock actuator ASSY (steering lock ECM).
    2. Measure the resistance according to the following table.

      Voltage

      STANDARD VALUE SPECIFICATION

      Inspection terminals Inspection conditions Standard value
      Positive (+) tester examination →D59-4 (SLP)
      Ground (-) tester examination →chassis ground      		 The steering is locked.* 10 kΩ or more
      Positive (+) tester examination →D59-4 (SLP)
      Ground (-) tester examination →chassis ground      		 The steering is unlocked.* 1 Ω or less
      NOTE:
      • *: When the shift lever is in P*, if a door is opened or closed with the engine switch off, the steering wheel is locked. After that, if the engine switch turns on (ACC) or on (IG), the steering wheel is unlocked.
      • DTC B2285 may be output if there is a problem in the steering lock ECM (steering lock actuator ASSY). The steering lock position signal and the unlock position signal are sent from the steering lock ECM (steering lock actuator ASSY) to the collation ECM (smart key ECM ASSY).

        *: for automatic transmission

      G12589381Courtesy of SUBARU OF AMERICA, INC.
      RESULT DESCRIPTION

      Result Go to
      OK A
      NG B
      1. Go to next step
      2. Replacing the steering lock actuator ASSY (steering lock ECM)
  6. Checking the harnesses and connectors (collation ECM (smart key ECM ASSY) - steering lock actuator ASSY (steering lock ECM))
    1. Remove the D41 connector of the collation ECM (smart key ECM ASSY).
    2. Remove the D59 connector of the steering lock actuator ASSY (steering lock ECM).
    3. Measure the resistance according to the following table.
      STANDARD VALUE SPECIFICATION - RESISTANCE

      Inspection terminals Inspection conditions Standard value
      D41-26 (SLP) - D59-4 (SLP1) Always 1 Ω or less
      D41-26 (SLP) - chassis ground Always 10 kΩ or more

      OK: Go to next step

      NG: Repair or replacement of the harnesses or connectors

      Replacement of the collation ECM (smart key ECM ASSY)

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