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 Volvo V90 T6 R-DesignFACTORY OEM SERVICE PROCEDURE
Power Steering Control Module (PSCM) (6/163) [2017-2022]: Description
The Power Steering Control Module (PSCM) consists of two parts:
- Electric motor:
The electric motor is fitted to the steering gear.
- Control module: The control module is integrated in the electric motor and contains all the logic and functioning for reading, writing, and storing DTC's. The control module also has a built-in NTC temperature sensor. The NTC temperature sensor allows the control module to diagnose, limit or disengage the power steering if there is excessive temperature and friction.
- Torque sensor: The torque sensor measures the force that the driver is using to steer.
The Power Steering Control Module (PSCM) is one unit. The control module, electric motor, and sensor are part of this unit.
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.