Exam 118: Power-Assisted Steering Operation and Service

A power steering pressure test is being performed, and the pressure is higher than specifications with the engine running and the steering wheel stationary in the straight ahead position. Technician A says that a restricted high pressure line could be the cause. Technician B says that internal leakage inside the steering gear or rack and pinion unit could be the cause. Which technician is correct?

What can cause hard steering on a vehicle equipped with a hydraulic power assisted steering system?

What type of motor is used in most electric power steering (EPS) systems?

If the steering column of an electric power steering system vehicle is replaced, what may have to be re-learned by the electric power steering control module?

The electrohydraulic power steering pump provides hydraulic power to the steering gear and ________.

Technician A says that one advantage of hydraulics compared to a mechanical linkage is that fluid has no fixed shape. Technician B says that hydraulics offer the opportunity to multiply the input force. Which technician is correct?

When pressure testing an hydraulic assisted power steering system, the highest pressures were greater that 50 PSI of each other. This indicates a problem with ________.

What law states that pressure on a confined fluid is transmitted equally in all directions and acts with equal force on equal areas?

Technician A says that some power assist systems use an external cooler for the power steering fluid. Technician B says that all variable assist systems are electrically actuated. Who is correct?

Electronically controlled variable assist power steering systems vary the amount of boost by ________.

A system flush is required when any major power steering repair is performed.

High pressure hoses have to be used on the high pressure side of the power steering system because pressures can reach as high as ________.

Which statement is TRUE regarding the flow control valve on a power steering pump?

Which of the following represent typical power steering pressures?

Technician A says that lifting the vehicle and turning the steering wheel may help bleed air out of some systems. Technician B says that if this procedure is used, the wheels should be turned from stop to stop. Which technician is correct?

Two technicians are discussing the proper procedure for bleeding air from a power steering system. Technician A says that the front wheels of the vehicle should be lifted off the ground before bleeding. Technician B says that the steering wheel should be turned left and right with the engine off during the procedure. Which technician is correct?

All power steering pumps have integral reservoirs.

Which type of variable effort steering design uses a variable bi-directional magnetic rotary actuator built into the steering rack?

Two technicians are discussing electric power steering (EPS) systems. Technician A says that some systems operate on 12 volts. Technician B says that some systems operate on 42 volts, such as on some hybrid electric vehicles. Which technician is correct?

What is the maximum pressure a power steering pump provides during low speed cornering?