* Power Steering Pump: This is the heart of the system, electrically driven by the engine and generating hydraulic pressure. It's located in the engine compartment, usually near the front of the engine.
* Power Steering Control Valve (or Rack and Pinion): This is the valve that directs the hydraulic fluid to move the steering rack. This is also in the engine compartment, integrated either into the power steering pump (less common in this era) or directly attached to the steering rack itself (more common in the 2001 SL2). It's usually close to the firewall. Finding the rack and pinion is the key here.
* Steering Rack: This converts the rotational motion of the steering wheel into linear motion to turn the wheels. The control valve is integrated with this.
* Electrical Connections: The electrical portion of the circuit involves wiring connected to the power steering pump from the vehicle's electrical system. This wiring will run from the pump through the engine bay to the car's fuse box and possibly other control modules. Faults might show up in blown fuses or relays.
To find the specific location of the control valve (most relevant part of the "circuit"), you'll need to:
1. Consult a repair manual: A Chilton's or Haynes repair manual specifically for a 2001 Saturn SL2 will have diagrams showing the exact location of the power steering components. This is the best approach.
2. Use an online parts diagram: Many online auto parts stores (like AutoZone, Advance Auto Parts) allow you to look up parts diagrams for your specific vehicle. Find the steering rack or power steering pump and it should show you the nearby components.
3. Visual Inspection (with caution): Carefully look in the engine compartment near the steering rack. The power steering pump is usually fairly large and easy to identify. The lines running from it, and the control valve, are often noticeable. Be extremely careful when working around the engine compartment; hot surfaces and moving parts present risks.
Remember that working on power steering systems can involve high pressure hydraulic fluid, so it's best left to experienced mechanics unless you're familiar with automotive hydraulic systems.
