Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2020 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
General Scan Tool
WARNING: This page is about a different variant/trim than selected.
- Check that no DTC remains after clearing memory. Refer to ENGINE (DIAGNOSTICS) (STI)>CLEAR MEMORY MODE .
- Warm up the engine.
- Install the delivery mode fuse (A).CAUTION: Do not use any fuses that are installed on the vehicle.
- Connect the general scan tool to data link connector located in the lower portion of the instrument panel (on the driver's side).CAUTION: Do not connect the scan tools except for Subaru Select Monitor and general scan tool.
- Start the engine.NOTE: Depress the clutch pedal when starting engine.
- Turn the neutral position switch to ON using gear shift lever.
- Keep the engine speed in 2, 500 - 3, 000 rpm range for 40 seconds.
- Place the gear shift lever in 1st gear and drive the vehicle at 5 to 10 km/h (3 to 6 MPH).NOTE:
- For AWD model, release the parking brake.
- The rotating speed difference between front and rear wheels may illuminate the ABS warning light, but this does not indicate a malfunction. When engine control system diagnosis is finished, perform the VDC memory clearance procedure of self-diagnosis function. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>CLEAR MEMORY MODE .
- Using the general scan tool, check for DTC and record the result (s).NOTE:
- For detailed operation procedures, refer to the general scan tool operation manual.
- For details concerning DTC, refer to "List of Diagnostic Trouble Code (DTC)". Refer to ENGINE (DIAGNOSTICS) (STI)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .
Factory Service Tools
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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.
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