note | Inspection items for abnormal sound - Check of sound source and incoming route (radiated sound, propagation sound, resonance, etc.), and measurement at driver's seat, front passenger's seat, and rear passenger's seat
- Change of sound during cold and after warm up (Change of fluid, and hydraulic pressure)
- Change of sound with the engine speed (r/min order change)
- Change of sound with the vehicle speed (r/min order change, wind noise)
- Change of sound with the throttle valve opening (engine output change, hydraulic pressure change)
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