On my 2001, I hear a device periodically operating. Sounds like a vacume or compressor pump. What is it ? ...
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15 years ago
Motorized Device
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15 years ago
The water pump that stores the hot water from the engine after you turn it off?
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15 years ago
Peter Granzeau wrote in news: snipped-for-privacy@4ax.com:
That didn't appear until Gen2.
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15 years ago
Since the OP said "periodically" instead of "after startup", that pumplike noise might simply be the engine as it runs and stops. At speed, general noise masks it.
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15 years ago
Brake pressure accumulator.
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15 years ago
What is the ...
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15 years ago
In a conventional car the brake booster is powered by vacuum from the intake manifold and stored in the booster chamber via a check valve. There is no guarantee the ICE in the Prius will run or have recently run when the brake boost is needed so there is a pump that performs the equivalent function.
Mike
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15 years ago