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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 932 (Noise, Vibration And Harshness -- F250-F550 Super Duty) >> Diagnostic Tests >> Noise, Vibration and Harshness (NVH) >> Pinpoint Tests >> Pinpoint Test D: Power Steering Moan

Pinpoint Test D: Power Steering Moan

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. D1 CHECK THE POWER STEERING SYSTEM 
    • Carry out the Vehicle Cold Soak Procedure in this article.
    • 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.
  2. 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 - GENERAL INFORMATION article. CARRY OUT the Vehicle Cold Soak Procedure and TEST the system for normal operation.
    2. NO  : Normal system operation.
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