2020 Subaru BRZ Limited, Automatic TransFACTORY OEM SERVICE PROCEDURE

Checking/Clearing DTC

  1. Checking DTC (reading with SSM4)
    1. Connect the SSM4 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM4.
    4. Check diagnostic codes (current malfunction) using SSM4.
    5. Check diagnostic codes (temporary code) using SSM4.
    NOTE:
    Displayed items Contents
    [Present fault] DTCs that indicate the error
    [Temporary Diagnostic Code(s)]  
    • DTCs that indicate the temporary error
    • Indicates the possibility of error though the error is not confirmed.
    [Readiness code] Self-diagnostic status can be monitored concerning the given DTC.
    • After the test drive, check that the self-diagnosis for the target DTC is completed successfully by confirming [Readiness code], and then check [Present fault] or [Temporary Diagnostic Code(s)].
    • For DTCs (P0171, etc.) that detect error in two trips, the error occurred in the first trip is stored to the engine control computer as temporary error.
    • Present fault stores the freeze frame data.
  2. Clearing DTC using SSM4
    1. Connect the SSM4 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM4.
    4. Using the SSM4, select the following menu items, and clear the DTC: [Each System]/[Engine Control System]/[Clear Memory].
      CAUTION:
      • When the clearing DTC cannot be performed successfully, turn the ignition switch to OFF, and then retry the operation.
      • Do not clear the DTC using SSM4 until the cause of failure is identified.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.