Question

1. a vehicle equipped with hydraulic power steering has no assist.

technician a says that a stuck open power steering pressure relief valve could be the cause.
technician b says that a missing serpentine drive belt could be the cause.
who is right?
a. a only
b. b only
c. both a and b
d. neither a nor b

Explanation:

• For Technician A: If the power - steering pressure relief valve is stuck open, the pressure in the hydraulic system cannot build up properly. Hydraulic power steering relies on pressure in the system to provide assist. Without proper pressure (due to the stuck - open valve), there will be no assist.
• For Technician B: The serpentine drive belt is responsible for driving the power - steering pump. If the belt is missing, the power - steering pump will not operate. Since the pump is not working, there will be no hydraulic fluid circulation and pressure generation, resulting in no power - steering assist.

Answer:

C. Both A and B