2018 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Check Si-Drive (SUBARU Intelligent Drive) System: Notes

Diagnosis:Β 

SI-DRIVE mode does not switch.

CAUTION: Note that SI-DRIVE system operates the following controls when it switches the modes.
  1. Cannot switch to S# (Sport Sharp) mode when the engine is cold, and S# (Sport Sharp) switch prohibition buzzer sounds.
  2. Switches to S (Sport) when turning the engine ON after turning the engine OFF in S# (Sport sharp) mode.
  3. Returns to the mode last selected when turning the engine ON after turning the engine OFF in S (Sport) or I (Intelligent) mode.
  4. Switches to S (Sport) when the malfunction indicator light illuminates while the engine is running. In this case, Cannot switch to S# (Sport Sharp) or I (Intelligent) mode.
  5. If there is a possible engine coolant or engine oil temperature overheat condition, it will not be possible to switch to the S# (Sport Sharp) mode. Switches to S (Sport) while driving in S# (Sport sharp) mode.
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When to See a Mechanic

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

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

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