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Inspection steps

CAUTION:
  • The steering lock system is equipped with functions that use multiplex communication. Firstly, please follow the directions in "How to troubleshoot" and then perform troubleshooting after confirming that there is no malfunction in the communication system.
  • After repair is completed, confirm that trouble symptoms do not reoccur.
  • Confirm that no diagnostic codes are output. (If diagnostic codes are output, firstly perform a diagnostic code flow chart check.)
  • When replacing the smart key computer ASSY (Collation ECM), the steering lock actuator ASSY (Steering lock ECM), or the ID code box (with the ID code box), please check the applicable precautions (Refer to ENTRY & START SYSTEM (ENTRY FUNCTION) ), and refer to the "Registration manual for immobilizer".
  • After replacing the steering lock actuator ASSY (Steering lock ECM), before starting the engine be sure to turn the steering mechanism to the left and right to confirm that the steering is not locked. If the steering is locked, perform the steering lock procedure (open and close any door when the vehicle is in the IG OFF state) and then unlock the steering (press the push button start switch). The engine cannot be started when the steering is locked.
  1. Read the SSM3 data (unlock request reception state)
    1. Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.
      SSM3 SCREEN: [EACH SYSTEM CHECK] →[KEYLESS ACCESS SYSTEM] →[COLLATION ECM] →[CURRENT DATA DISPLAY & SAVE]

      Item name Description/display range Normal value Remarks
      [Steering lock request reception status] Indicates the lock request signal reception state. Display range: OK/NG(Past) OK: When a lock request is received within 10 seconds after any one of the doors is opened while the shifter is in the P position (Transmission A/T) and the vehicle ignition is turned to IG OFF. NG(Past): Other than the above If "OK" is not displayed even if the steering lock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

      Criteria: After changing from IG ON to IG OFF, a lock request signal is received within 10 seconds after any of the doors are opened.

      NG: Go to Step  7.

      OK: Go to Next Step

  2. Inspect the steering lock actuator ASSY (Steering lock ECM)
    1. Measure the resistance between the terminals.
      RESISTANCE

      Inspection terminals Inspection conditions Standard value
      D59-1 (GND) - Chassis ground Always Less than 1 Ω
      CAUTION: If defective, check for ground point looseness.
    2. Measure the voltage between the terminals.
      VOLTAGE

      Inspection terminals Inspection conditions Standard value
      D59-7 (B) - Chassis ground Always 11 to 14 V
      Fig 1: Identifying Steering Lock ECM Connector B And GND Terminals
      G08555401Courtesy of SUBARU OF AMERICA, INC.

      NG: Repair or replacement of wiring harness or connector

      OK: Go to Next Step

  3. Inspect the steering lock actuator ASSY (Steering lock ECM)
    1. Use an oscilloscope to check the waveform between the terminals.
      Item Contents
      Inspection terminals D59-3 (SLR+) - D59-1 (GND)
      Equipment setting 2 V/DIV, 200 ms/DIV
      Inspection conditions Steering lock actuator motor stopped →Steering lock actuator motor running →Steering lock actuator motor stopped
      Fig 2: Identifying Steering Lock ECM Connector Terminals And Oscilloscope Waveform
      G08555402Courtesy of SUBARU OF AMERICA, INC.
      NOTE:
      • Lock motor stopped: No operation
      • Lock motor running:
        • Steering unlock: The electrical key transmitter SUB-ASSY (Electronic key) is being carried and the vehicle is set to ACC ON or IG ON.
        • Steering lock: The door is opened while the shifter is in the P position (Transmission A/T) and the vehicle is set to IG OFF and ACC OFF.

      NG: Go to Step  10.

      OK: Go to Next Step

  4. Read the SSM3 data (S code check)
    1. Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.
      SSM3 SCREEN: [EACH SYSTEM CHECK] →[KEYLESS ACCESS SYSTEM] →[COLLATION ECM] →[CURRENT DATA DISPLAY & SAVE]

      Item name Description/display range Normal value Remarks
      [S Code Check] Verification results between the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM)/OK or NG. OK: Confirmation results normal NG: Confirmation results abnormal If abnormal:
      • The ID code box (immobilizer code ECM) or the collation ECM (smart key ECM ASSY) ID codes are not registered, or they are malfunctioning.
      • The steering is not locked.
      • The steering is not unlocked. (The engine cannot be started.)

      Criteria: [S Code Check] is "OK".

      NG: Go to Step  12.

      OK: Go to Next Step

  5. Read the SSM3 data (L code check)
    1. Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.
      SSM3 SCREEN: [EACH SYSTEM CHECK] →[KEYLESS ACCESS SYSTEM] →[COLLATION ECM] →[CURRENT DATA DISPLAY & SAVE]

      Item name Description/display range Normal value Remarks
      [L Code Check] Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK NG: Collation results abnormal
      OK: Collation results normal
      • The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration.
      • Steering lock cannot be performed.
      • Steering unlock cannot be performed. (The engine cannot be started.)

      Criteria: [L code check] is "OK".

      NOTE: Collation fault causes
      • Steering lock actuator ASSY (Steering lock ECM) or smart key computer ASSY (Collation ECM) fault.
      • Communication malfunction between both ECMs.
      • One of the ECMs was replaced and is not yet registered.
      • When replaced with an ECM with a code that has already been written.

      NG: Go to Step  13.

      OK: Go to Next Step

  6. Replace the steering lock actuator ASSY (Steering lock ECM)
    1. Replace the steering lock actuator (Steering lock ECM) with a new part. (Refer to ASSEMBLY  )
    2. Perform registration. (Refer to the "Registration manual for immobilizer")
    3. Turn the ignition switch to ON.
    4. Operate the steering wheel to check the steering lock state.

      Criteria: The steering lock is released.

      NG: Go to Step  14.

      OK: Complete (Failure of the steering lock actuator ASSY)

  7. Read the SSM3 data (driver's door courtesy switch)
    1. Use the SSM3 to perform main body ECM (network gateway computer) data monitoring.
      SSM3 SCREEN: [EACH SYSTEM CHECK] →[INTEG. UNIT MODE] →[CURRENT DATA DISPLAY & SAVE]

      Item name Description/display range Normal value Remarks
      The driver's door courtesy switch State of the driver's door courtesy light switch.
      Display range: Closed/Open      		 Closed: Driver's door closed.
      Open: Driver's door open.      		 -

      Criteria: The data monitoring trend changes as the driver's door is opened and closed.

      NG: Carry out main body ECM fault diagnosis (Refer to ECM TERMINAL ARRANGEMENT )

      OK: Go to Next Step

  8. Inspect the smart key computer ASSY (Collation ECM)
    1. Disconnect the smart key computer ASSY (Collation ECM) connector D41.
    2. Disconnect the brake actuator ASSY (skid control computer) connector A5.
    3. Measure the resistance between the terminals.
      RESISTANCE

      Inspection terminals Inspection conditions Standard value
      D41-27 (SPD) - A5-2 (SPD) Always Less than 1 Ω
      D41-27 (SPD) or A5-2 (SPD) - Chassis ground Always 10 k Ωor more

      NG: Repair or replacement of wiring harness or connector

      OK: Go to Next Step

  9. Smart key computer ASSY (Collation ECM)
    1. Replace the smart key computer ASSY (Collation ECM) with a new part.
    2. Perform registration. (Refer to the "Registration manual for immobilizer")
    3. Turn the ignition switch to ON.
    4. Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.
      SSM3 SCREEN: [EACH SYSTEM CHECK] →[KEYLESS ACCESS SYSTEM] →[COLLATION ECM] →[CURRENT DATA DISPLAY & SAVE]

      Item name Description/display range Normal value Remarks
      [Steering lock request reception status] Indicates the lock request signal reception state. Display range: NG(Past)/OK OK: When a lock request is received within 10 seconds after any one of the doors is opened while the shifter is in the P position (Transmission A/T) and the vehicle ignition is turned to IG OFF.
      NG(Past): Other than the above      		 If "OK" is not displayed even if the steering lock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction.

      Criteria: After changing from IG ON to IG OFF, a lock request signal is received within 10 seconds after any of the doors are opened.

      NG: Replace the ID code box (immobilizer ECM)

      OK: Complete (Smart key computer ASSY (Collation ECM) fault)

  10. Inspect the wiring harness and connector (Smart key computer ASSY (Collation ECM) - Steering lock actuator ASSY (Steering lock ECM)).
    1. Disconnect the steering lock actuator (Steering lock ECM) connector D59.
    2. Disconnect the smart key computer ASSY (Collation ECM) connector D41.
    3. Confirm that there is no deformation or corrosion on the connector case and terminal.

      Criteria: There is no deformation or corrosion on the connector case and terminal.

    4. Measure the resistance between the terminals.
      RESISTANCE

      Inspection terminals Inspection conditions Standard value
      D41-29 (SLR+) - D59-3 (SLR+) Always Less than 1 Ω
      D59-3 (SLR+) - Chassis ground Always 10 k Ωor more

      NG: Repair or replacement of wiring harness or connector

      OK: Go to Next Step

  11. Replace the steering lock actuator ASSY (Steering lock ECM)
    1. Replace the steering lock actuator ASSY (Steering lock ECM) with a new part. (Refer to ASSEMBLY  )
    2. Perform registration. (Refer to the "Registration manual for immobilizer")
    3. Turn the ignition switch to ON.
    4. Operate the steering wheel to check the steering lock state.

      Criteria: The steering lock is released.

      NG: Replace the smart key computer ASSY (Collation ECM)

      OK: Complete (Failure of the steering lock actuator ASSY)

  12. Replace the ID code box (immobilizer ECM)
    1. Replace the ID code box (immobilizer ECM) with a new part.
    2. Perform registration. (Refer to the "Registration manual for immobilizer")
    3. Turn the ignition switch to ON.
    4. Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.
      SSM3 SCREEN: [EACH SYSTEM CHECK] →[KEYLESS ACCESS SYSTEM] →[COLLATION ECM] →[CURRENT DATA DISPLAY & SAVE]

      Item name Description/display range Normal value Remarks
      [S Code Check] Verification results between the collation ECM (smart key ECM ASSY) and the ID code box (immobilizer code ECM)/OK or NG. OK: Confirmation results normal NG: Confirmation results abnormal If abnormal:
      • The ID code box (immobilizer code ECM) or the collation ECM (smart key ECM ASSY) ID codes are not registered, or they are malfunctioning.
      • The steering is not locked.
      • The steering is not unlocked. (The engine cannot be started.)

      Criteria: [S Code Check] is "OK".

      NG: Replace the smart key computer ASSY (Collation ECM)

      OK: Complete (ID code box (immobilizer ECM) fault)

  13. Replace the ID code box (immobilizer ECM)
    1. Replace the ID code box (immobilizer ECM) with a new part.
    2. Perform registration. (Refer to the "Registration manual for immobilizer")
    3. Turn the ignition switch to ON.
    4. Use the SSM3 to perform smart key computer ASSY (Collation ECM) data monitoring.
      SSM3 SCREEN: [EACH SYSTEM CHECK] →[KEYLESS ACCESS SYSTEM] →[COLLATION ECM] →[CURRENT DATA DISPLAY & SAVE]

      Item name Description/display range Normal value Remarks
      [L Code Check] Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK NG: Collation results abnormal OK: Collation results normal
      • The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration.
      • Steering lock cannot be performed.
      • Steering unlock cannot be performed. (The engine cannot be started.)

      Criteria: [L code check] is "OK".

      NG: Replace the steering lock actuator ASSY (Steering lock ECM) (Refer to ASSEMBLY  )

      OK: Complete (ID code box (immobilizer ECM) fault)

  14. Replace the smart key computer ASSY (Collation ECM)
    1. Replace the smart key computer ASSY (Collation ECM) with a new part.
    2. Perform registration. (Refer to the "Registration manual for immobilizer")
    3. Turn the ignition switch to ON.
    4. Operate the steering wheel to check the steering lock state.

      Criteria: The steering lock is released.

      NG: Replace the ID code box (immobilizer ECM)

      OK: Complete (Smart key computer ASSY (Collation ECM) fault)

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