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Pinpoint Test L: Grinding/Moaning Noise - Continuous: Notes

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Normal Operation and Fault Conditions 

Some squealing noise from the brake system is acceptable under certain conditions such as cold start or low speed brake application. Under all other general driving conditions, the vehicle must come to a stop on brake application and the brake system operation must not create noise. A continuous grinding or moaning noise from the brake system on application of the brakes indicates a concern with the brake system.

Possible Sources