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Home › Subaru › 2015 › BRZ Series.Blue, Automatic Trans › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnostics (2 Of 3) › DTC P2158 Vehicle Speed Sensor "A" › Description of functions › Inspection steps

Inspection steps

NOTE: Read the freeze frame data using the SSM3. A part of the engine running conditions under which the engine trouble occurred is recorded in the freeze frame data, which is useful for troubleshooting.
  1. Reading SSM3 data (Vehicle speed)
    NOTE: Make sure that the speed meter operates normally.
    1. Connect the SSM3 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM3.
    4. Select the following menu items using the SSM3. [Inspection of BRZ]/[Each System Check]/[Engine Control System]/[Current Data Display & Save]/[Vehicle Speed]
    5. Perform test drive. (Refer to "TEST DRIVE " under "Description of functions")
      WARNING: When performing this driving test, always observe the applicable traffic laws such as the speed limit.
    6. Read the [Vehicle Speed] displayed on the SSM3.

      Standard value: The vehicle speed shown in current data display.save and the actual vehicle speed is the same

      NG: Go to Step 2.

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

  2. Read DTC (VSC system)
    1. Connect the SSM3 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM3.
    4. Follow the SSM3 on-screen instructions to check the DTC of the VSC system. (refer to CHECKING/CLEARING DIAGNOSTIC CODES )

      Result

      Result Go to
      No DTC is output. A
      DTC is output. B

      B: To corresponding DTC chart (refer to LIST OF DIAGNOSTIC CODES )

      A: Go to next step

  3. Clear DTC
    1. Connect the SSM3 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM3.
    4. Follow the SSM3 on-screen instructions to clear the DTCs. (Refer to CHECKING/CLEARING DTC )

      Next

  4. Perform test drive for operation check
    1. Perform test drive. (Refer to "TEST DRIVE " under "Description of functions")
      WARNING: When performing this driving test, always observe the applicable traffic laws such as the speed limit.
    2. Follow the SSM3 on-screen instructions to check the DTCs. (Refer to CHECKING/CLEARING DTC )

      Result

      Result Go to
      P2158 is not output. A
      P2158 is output. B

      B: Replacement of the engine control computer (refer to REMOVAL )

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

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