I thought you suspected a fault. If so just what keeps the fault from being unintended application of the solenoids. Guess I just don't get it. The pump was mentioned, do you envision a fault that operated the pump to be more likely than a fault that set the solenoids into the sound you describe. I can't envision the pump making the noise you describe.

You described the situation and I described a senario. Just what does movement have to do with it.

ASR uses the same reservoir as ABS. There is a pressure reservoir that isn't in a ABS version.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician