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.

2017 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

WASTEGATE Control Solenoid Valve

Check that the wastegate control solenoid valve has no deformation, cracks or other damages.

Check the resistance between the wastegate control solenoid valve terminals.

Fig 1: Measuring Resistance Between Knock Sensor Terminals

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Standard
1 and 2	24±3 Ω (when 20°C (68°F))

Check that air does not come out from (B) when air is blown into (A).

Fig 2: Checking Air Blown System
Courtesy of SUBARU OF AMERICA, INC.
Connect the battery positive terminal to the terminal No. 1 and the battery negative terminal to the terminal No. 2. Check that air is discharged from (B), when supplying air to (A).

Fig 3: Connecting Battery Positive Terminal To Terminal No. 1 And Battery Negative Terminal To Terminal No. 2

Courtesy of SUBARU OF AMERICA, INC.

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.