Pinpoint Test D: Power Steering Moan

Test Step 

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. CARRY OUT the VEHICLE COLD SOAK PROCEDURE  and TEST the system for normal operation. REFER to POWER STEERING .
   2. No:  Normal system operation.