| The brake pedal must be depressed with the engine running and the vehicle stationary so that full vacuum support is guaranteed. |
| When brake pedal is fully depressed, a “click” must be audible in the brake servo; the mechanical brake assistant system is then activated. |
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| The brake pedal can now be released and actuated with less force. |
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| When the brake pedal is fully released, the brake assist system must release (no hydraulic pressure in the brake system). |
| The mechanical brake assist system cannot be repaired; the complete brake servo must be renewed. |
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