Pinpoint Test D: Power Steering Moan

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

Test Step

D1 CHECK THE POWER STEERING SYSTEM
- Carry out the Vehicle Cold Soak Procedure. Refer to VEHICLE COLD SOAK PROCEDURE .
- Key in START position.
- Turn the steering wheel while the noise is occurring and listen for changes in sound pitch or loudness.
- Key in OFF position.
- Does the sound pitch or loudness change while turning the steering wheel?
  1. Yes : GO to D2.
  2. No : CONDUCT a diagnosis on other suspect accessory drive components.
D2 VERIFY THE SOURCE
- Key in START position.
- Place an EngineEAR probe near the power steering pump/reservoir while the noise is occurring. While an assistant turns the steering wheel, listen for changes in sound pitch or loudness.
- Key in OFF position.
- Does the sound pitch or loudness change while turning the steering wheel?
  1. Yes : VERIFY that the supply tube to the pump is unobstructed. CHECK the fluid condition and level. DRAIN the fluid and REFILL. REFER to STEERING SYSTEM . CARRY OUT the Vehicle Cold Soak Procedure and TEST the system for normal operation. Refer to VEHICLE COLD SOAK PROCEDURE .
  2. No : Normal system operation.