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

Check Manifold Temperature Sensor Unit

Measure the resistance between engine coolant temperature sensor terminals.

Fig 1: Measuring Resistance Between Engine Coolant Temperature Sensor Terminals

Courtesy of SUBARU OF AMERICA, INC.

Temperature	Terminal No.	Standard
-20°C (-4°F)	1 and 2	Approx. 14.7±2.2 kΩ
25°C (77°F)		Approx. 2.0±0.2 kΩ
60°C (140°F)		Approx. 0.59±0.09 kΩ

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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