Steering System Noise Diagnosis

There is some noise in all power steering systems. One of most common is a hissing sound evident at standstill parking. Hiss is a very high frequency noise similar to that experienced while slowly closing a water tap. The noise is present in every valve and results from high velocity fluid passing valve orifice edges. There is no relationship between this noise and performance of vehicles steering system. Hiss may be expected when steering wheel is at end of its travel or slowly turning when vehicle is at a standstill.

Fig 1: Symptom Diagnosis & Testing - Power Steering (1 Of 2)

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Fig 2: Symptom Diagnosis & Testing - Power Steering (2 Of 2)

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Fig 3: Symptom Diagnosis & Testing - Binding Sticking Seized

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Fig 4: Symptom Diagnosis & Testing - Shake Shudder Vibration

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Fig 5: Symptom Diagnosis & Testing - Low Assist, No Assist, Hard Steering

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Fig 6: Symptom Diagnosis & Testing - Poor Return To Center

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Fig 7: Symptom Diagnosis & Testing - Loose Steering

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Fig 8: Symptom Diagnosis & Testing - Vehicle Leads To Side

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Fig 9: Symptom Diagnosis & Testing - Power Steering Fluid Leak

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Fig 10: Symptom Diagnosis & Testing - Foamy Or Milky Power Steering Fluid

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