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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1063 (Noise, Vibration And Harshness) >> 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 Lincoln MKX and 2007 Ford Edge. 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 .
    • 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 POWER STEERING . CARRY OUT the Vehicle Cold Soak Procedure  and TEST the system for normal operation.
    2. NO  : Normal system operation.
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