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.
2015 Subaru WRX STIFACTORY OEM SERVICE PROCEDURE
Camshaft Position Sensor (Method With Oscilloscope)
- Prepare an oscilloscope.
- Remove the glove box. <Ref. to REMOVAL , Glove Box.>
- Connect the probe to ECM connector.
- Intake camshaft position sensor
- Exhaust camshaft position sensor
Courtesy of SUBARU OF AMERICA, INC.
Camshaft position sensor Terminal No. Probe Intake RH 24 + LH 16 + Exhaust RH 23 + LH 29 + RH and LH 30 - - Start the engine and let it idle.
- Check the pattern is the same as the waveform and voltage shown below.
- After inspection, install the related parts in the reverse order of removal.
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.