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.
2016 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Light Control Sensor: Inspection
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
- Connect the connector.
- Turn the ignition switch to ON, and set the lighting switch to the AUTO position.
- Measure the voltage between connector terminals.
Terminal No. Inspection conditions Standard 2 (+) - 1 (-) Measure the voltage when the area around the auto light sensor, which was dark, becomes bright. Dark condition: Approx. 0.6 V or less Bright condition: Approx. 3 V or more - Replace the auto light sensor if the inspection result is not within the standard value.
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.