Engine off brake booster leak diagnostic systems and methods

Measuring and testing – Brake testing

Reexamination Certificate

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Reexamination Certificate

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07878053

ABSTRACT:
A control system for evaluating a brake booster system is provided. The control system includes an engine evaluation module that detects an engine off condition. A pressure evaluation module monitors hydraulic brake line pressure and detects changes in brake booster pressure during the engine off condition. A fault reporting module selectively detects a brake booster fault based on the brake line pressure and the changes in brake booster pressure.

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