Power brakes function only when the engine is running

The power brakes utilize vacuum pressure which is only created when the engine is running. Never let the vehicle roll to a stop with the engine switched off.
If the power brakes are not working, considerably higher pressure will be required on the brake pedal to compensate for the lack of power assistance. This can happen for example when towing your vehicle or if the engine is switched off when the vehicle is rolling. The brake pedal feels harder than usual.
See also:
Trailer Stability Assist (TSA)
Trailer Stability Assist is a system designed to
help stabilize a vehicle that is towing a trailer
when the vehicle and trailer have begun to
sway and is part of the Dynamic Stability and
Trac ...
Advanced
In this mode, body sway in curves is minimal
and steering response is very direct. Gear shifting
is done at high rpm in each gear for
dynamic and active driving. ...
Tire Pressure Monitoring System (TPMS)
The tire pressure monitoring system1 uses sensors
mounted in the tire valves to check inflation
pressure levels. When the vehicle is moving
at a speed of approximately 20 mph
(30 km/h) or faster, ...
