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Home >> Subaru >> 2016 >> BRZ Series.HyperBlue >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnostics - Introduction >> EFI System (Fa20) >> How To Troubleshoot
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How To Troubleshoot

  1. Bring in the car

    Next

  2. Interview and phenomenon check

    Next

  3. Read DTC
    1. Check the DTC(s) related to engine and CAN communication system and the freeze frame data.
    2. When DTC is output or freeze frame data is displayed, store it.
      CAUTION: When clearing the DTC and/or freeze frame data, be sure to store the data before clearing it.

      Result

      Result Go to
      When DTC not related to CAN communication system is output. A
      When no DTC is output. B
      When DTC related to CAN communication system is output. C

      B: Go to Step  12.

      C: Go to CAN communication article. (Refer to HOW TO TROUBLESHOOT )

      A: Go to next step

  4. Check repeatability of malfunction
    1. Perform repeatability test, referring to the result of the interview.

      Result

      Result Go to
      When malfunction is repeated A
      When malfunction is not repeated B

      B: Go to Step  9.

      A: Go to next step

  5. List of diagnostic codes (main inspection parts) or troubleshooting for DTC
    1. Refer to list of diagnostic codes, and perform troubleshooting for DTC. (Refer to DTC TABLE  )

      Result

      Result Go to
      When faulty points are not determined. A
      When faulty points are determined. B

      B: Go to Step  7.

      A: Go to next step

  6. System circuit inspection
    1. If the faulty parts are not specified after the diagnosis according to the inspection procedure, refer to the inspection method of the electrical circuit, and perform the circuit inspection again. (For system circuit figure, refer to CIRCUIT FIGURE  .)

      Next

  7. Repair faulty points

    Next

  8. Read DTC (Refer to CHECKING/CLEARING DTC  )

    Next: Complete

  9. Inspection for problems that do not normally occur (Refer to CHECKING/CLEARING DTC  )

    Next

  10. Repair faulty points

    Next

  11. Read DTC (Refer to CHECKING/CLEARING DTC  )

    Next: Complete

  12. Check repeatability of malfunction
    1. Perform repeatability test, referring to the result of the interview.

      Result

      Result Go to
      When malfunction is repeated A
      When malfunction is not repeated B

      B: Go to Step  19.

      A: Go to next step

  13. Symptom table
    1. Estimate the location of the faulty points from the result of the interview, and perform necessary inspection. (Refer to SYMPTOM TABLE  )

      Result

      Result Go to
      Faulty points are not determined. A
      Faulty points are determined. B

      B: Go to Step  17.

      A: Go to next step

  14. Basic inspection
    1. Estimate the location of the faulty points from the result of the interview, and perform necessary inspection. (Refer to SYMPTOM TABLE  )

      Result

      Result Go to
      Faulty points are not determined. A
      Faulty points are determined. B

      B: Go to Step  17.

      A: Go to next step

  15. Inspection with SSM3
    1. Check [Current Data Display & Save], and perform [System Operation Check Mode]. (Refer to CURRENT DATA DISPLAY & SAVE/SYSTEM OPERATION CHECK MODE  )

      Result

      Result Go to
      Faulty points are not determined. A
      Faulty points are determined. B

      B: Go to Step  17.

      A: Go to next step

  16. System circuit inspection
    1. If any defective point is not located in the areas outside of the engine control computer after diagnosis according to the inspection procedure, refer to the inspection method of the electrical circuit, and perform the circuit inspection again. (For system circuit figure, refer to CIRCUIT FIGURE  .)

      Next

  17. Repair faulty points

    Next

  18. Check trouble phenomenon
    1. Perform driving test referring to the result of the interview, and check that the malfunction does not recur.

      Next: Complete

  19. Symptom table
    1. Estimate the location of the faulty points from the result of the interview, and perform necessary inspection. (Refer to SYMPTOM TABLE  )

      Result

      Result Go to
      Faulty points are not determined. A
      Faulty points are determined. B

      B: Go to Step  24.

      A: Go to next step

  20. Basic inspection
    1. Estimate the location of the faulty points from the result of the interview, and perform necessary inspection. (Refer to BASIC INSPECTION  )

      Result

      Result Go to
      When faulty points are not determined. A
      When faulty points are determined. B

      B: Go to Step  24.

      A: Go to next step

  21. Inspection with SSM3
    1. Check [Current Data Display & Save], and perform [System Operation Check Mode]. (Refer to CURRENT DATA DISPLAY & SAVE/SYSTEM OPERATION CHECK MODE  )

      Result

      Result Go to
      Faulty points are not determined. A
      Faulty points are determined. B

      B: Go to Step  24.

      A: Go to next step

  22. System circuit inspection
    1. If any defective point is not located in the areas outside of the engine control computer after diagnosis according to the inspection procedure, refer to the inspection method of the electrical circuit, and perform the circuit inspection again. (For system circuit figure, refer to CIRCUIT FIGURE  .)

      Next

  23. Inspection for problems that do not normally occur (Refer to CHECKING/CLEARING DTC  )

    Next

  24. Repair faulty points

    Next

  25. Check trouble phenomenon
    1. Perform driving test referring to the result of the interview, and check that the malfunction does not recur.

      Next: Complete

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