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:
Integrated booster cushion
Volvo's own integrated booster cushion has
been specially designed to help safeguard a
child seated in the rear seat. When using an
integrated booster cushion, the child must be
secured with the ...
Anti-lock Brake System (ABS)
The ABS system in your vehicle performs a
self-diagnostic test when the vehicle first reaches
the speed of approximately 12 mph
(20 km/h). The brake pedal will pulsate several
times and a sound ma ...
Function
Function overview
1 - Warning light, braking by driver required 2 - Controls in steering wheel
3 - Radar sensor in front grille
Adaptive Cruise Control consists of:
A cruise control system ...