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Optimized Hydraulic Braking (3.0L All-Wheel Drive (AWD) and 3.5L only)

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

When the vacuum sensor in the booster indicates vacuum is below a predetermined level, a DTC is set in the ABS module. A low vacuum DTC is set after a pre-determined time, depending on driving conditions. It could take as long as 10 minutes to set the DTC with vehicle speed above 2 km/h and greater than 30% throttle. If the brake pedal is applied with low vacuum in the booster, the ABS module activates the pump motor in the HCU to assist with braking.

Refer to POWER BRAKE ACTUATION -- BRAKE BOOSTER article for sensor removal and installation information.

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