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.
Speed sensitive power steering
If the car has speed dependent power steering to control the steering assistance, there is a stepper motor which controls a hydraulic valve on the steering gear.
The stepper motor is operated by the central electronic module (CEM) and checked via four outputs in the central electronic module (CEM). Signals are transmitted from the central electronic module (CEM) to set the motor to the correct position for the speed of the car. The motor deploys the valve on the steering gear to the required degree and regulates the oil in the steering gear to reduce or increase the servo assistance. The steering assistance increases at lower speeds and is reduced at higher speeds.
There are diagnostics for the power steering.
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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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