8 Questions
What is the main advantage of EPS systems over hydraulic power steering systems?
Reduced vehicle weight and complexity
What are the two basic types of EPS systems?
Rack-mounted and column-mounted
What is the function of the EPS ECU in the EPS system?
To control the power steering motor
What is the difference between EPS systems that operate on 12 volts and those that operate on 42 volts?
The amount of power output
What type of power steering system is used on the Chevrolet/GMC parallel hybrid truck and the Mini Cooper?
Electrohydraulic power steering (EHPS
What is the main component that the PSCM controls in the EPS system?
The power steering motor
Can the steering shaft torque sensor and the steering wheel position sensor be serviced separately from each other or from the steering column assembly?
No
What type of faults can EPS systems generate diagnostic trouble codes (DTCs) for?
Chassis-related faults
Study Notes
- All HEV and EV vehicles use electric power steering (EPS) systems.
- EPS systems replace hydraulic components with an electric motor to provide power assist effort.
- There are two basic types of EPS systems: rack-mounted and column-mounted.
- EPS systems have advantages such as reduced vehicle weight and complexity, and improved cold weather starting.
- EPS systems include components such as the EPS ECU, steering torque sensor, and power steering motor.
- EPS systems can operate on 12 volts or 42 volts with an electronic controller and a brushless DC motor as an actuator.
- The PSCM controls the power steering motor and receives a vehicle speed message from the PCM.
- The steering shaft torque sensor and the steering wheel position sensor are not serviced separately from each other or from the steering column assembly.
- Electrohydraulic power steering (EHPS) is used on some vehicles, such as the Chevrolet/GMC parallel hybrid truck and the Mini Cooper.
- EPS systems can generate diagnostic trouble codes (DTCs) for chassis-related faults or data communication faults.
Test your knowledge on electric power steering systems with this informative quiz! From the types of EPS systems to their advantages and components, this quiz covers it all. See how much you know about EPS and EHPS, as well as diagnostic trouble codes and more. Whether you're an automotive technician or simply interested in learning more about EPS, this quiz is for you!
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