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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Lin Communication System (Diagnostics) >> Large-Scale Multiplex Communication System For Vehicle Body [LIN] >> Checking/Clearing Diagnostic Codes

Checking/Clearing Diagnostic Codes

  1. Checking diagnostic codes (reading with SSM4)
    1. DTC check for the main body ECM (Multiplex network body computer)
      1. Connect SSM4 to the data link connector with IG OFF.
      2. Turn IG to ON, and turn on the SSM4.
      3. Follow the instruction on SSM4 screen. Select [Each System] →[Body Control] →[DTC], and then read DTC.
      NOTE: If meaningless DTC is displayed, the main body ECM (Multiplex network body computer) may be defective.
    2. DTC check for the collation ECM (smart key computer ASSY)
      1. Connect SSM4 to the data link connector with IG OFF.
      2. Turn IG to ON, and turn on the SSM4.
      3. Follow the instruction on SSM4 screen. Select [Each System] →[Keyless Access(Collation ECM)] →[DTC], and then read DTC.
      NOTE:
      • Collation ECM (Smart key computer ASSY) also outputs DTCs for the steering lock ECM (Steering lock actuator ASSY) and ID code box (immobilizer code ECM)*.
      • If meaningless DTC is displayed, the collation ECM (Smart key computer ASSY) may be defective.

        *: The ID code box is included.

  2. Clearing diagnostic code records (Cleared by the SSM4)
    CAUTION: To permanently clear DTCs indicating lost connection, "Clear ECM connection history" function must be used.
    1. Clearing DTC for the main body ECM (Multiplex network body computer)
      1. Connect SSM4 to the data link connector with IG OFF.
      2. Turn IG to ON, and turn on the SSM4.
      3. Follow the instruction on SSM4 screen. Select [Each System] →[Body Control] →[Clear Memory], and then clear DTC.
      CAUTION:
      • If deletion is not possible, retry it after turning the ignition to IG OFF and then on again.
      • Do not use the SSM4 to delete diagnostic codes until the cause of the trouble has been identified.
    2. Clearing DTC for the collation ECM (Smart key computer ASSY)
      1. Connect SSM4 to the data link connector with IG OFF.
      2. Turn IG to ON, and turn on the SSM4.
      3. Follow the instruction on SSM4 screen. Select [Each System] →[Keyless Access(Collation ECM)] →[Clear Memory], and then clear DTC.
      CAUTION:
      • If deletion is not possible, retry it after turning the ignition to IG OFF and then on again.
      • Do not use the SSM4 to delete diagnostic codes until the cause of the trouble has been identified.
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