ASE A4 Suspension and SteeringSteering System Diagnosis and RepairMedium
A customer reports that their vehicle's power steering system frequently makes a loud 'squawking' or 'squealing' noise, especially when turning the steering wheel rapidly or at full lock. The noise is intermittent and seems to coincide with increased steering effort. What is the MOST likely cause?
- AAir trapped in the power steering system.
- BInternal wear in the power steering pump.
- CA collapsed power steering return hose.
- DA loose or worn power steering pump drive belt.
Show answer & explanationAnswer & explanation
Correct answer: D. A loose or worn power steering pump drive belt.
A loud 'squawking' or 'squealing' noise, especially under increased load (like turning rapidly or at full lock) and coinciding with increased steering effort, is a classic symptom of a slipping power steering pump drive belt. The belt cannot transmit enough power, causing it to slip and generate noise.
Why the other options are wrong
- A. Air trapped in the power steering system usually causes a groaning or hissing noise and foaming fluid, not a distinct squawking/squealing from belt slip.
- B. Internal wear in the power steering pump typically causes a constant whine or groan, not a squawking/squealing specifically under load.
- C. A collapsed power steering return hose would restrict fluid flow, leading to increased effort and possibly a groaning noise, but not typically a loud squawking.
Power Steering Belt Slip
A loud squawking or squealing noise, especially when turning the steering wheel under load, is a key indicator of a slipping power steering pump drive belt.
- Noise under load (turning).
- Accompanied by increased steering effort.
- Caused by loose or worn belt.
Memory trick: Squawking steer? The belt's too loose, my dear!