2019 Subaru WRX STI Series.GrayFACTORY OEM SERVICE PROCEDURE

Diagnostics for Engine Starting Failure: Procedure

1. Check of the fuel amount
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2. CHECK IMMOBILIZER.
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3. Inspection of starter motor circuit Refer to ENGINE (DIAGNOSTICS) (STI)>DIAGNOSTICS FOR ENGINE STARTING FAILURE>STARTER MOTOR CIRCUIT .
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4. Inspection of ECM power supply and around line Refer to ENGINE (DIAGNOSTICS) (STI)>DIAGNOSTICS FOR ENGINE STARTING FAILURE>CHECK POWER SUPPLY AND GROUND LINE OF ENGINE CONTROL MODULE (ECM) .
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5. Inspection of ianition control system Refer to ENGINE (DIAGNOSTICS) (STI)>DIAGNOSTICS FOR ENGINE STARTING FAILURE>IGNITION CONTROL SYSTEM .
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6. Inspection of fuel pump circuit Refer to ENGINE (DIAGNOSTICS) (STI)>DIAGNOSTICS FOR ENGINE STARTING FAILURE>FUEL PUMP CIRCUIT .
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7. Inspection of fuel injector circuit Refer to ENGINE (DIAGNOSTICS) (STI)>DIAGNOSTICS FOR ENGINE STARTING FAILURE>FUEL INJECTOR CIRCUIT .
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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.