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.
2021 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE
Control Valve Body: Inspection
- Check for oil leaks.
- Check that there is no deformation, cracks or other damages.
- Measure the resistance of each solenoid.NOTE: Measurement should be performed at 20°C (68°F).
Solenoid Terminal No. Standard Line pressure solenoid No. 1 - Control valve body 3.3 - 7.3 Ω Lock-up duty solenoid No. 2 - Control valve body 10 - 14.2 Ω F&R solenoid No. 3 - Control valve body 3.5 - 7.1 Ω Secondary solenoid No. 4 - Control valve body 3.3 - 7.3 Ω Oil pump ON/OFF solenoid No. 5 - Control valve body 12.5 - 19.5 Ω Primary DOWN solenoid No. 6 - Control valve body 10 - 14.2 Ω Primary UP solenoid No. 7 - Control valve body 10 - 14.2 Ω AWD solenoid No. 8 - Control valve body 3.3 - 7.3 Ω
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.