Anti-Lock Brake System - Volvo 2006 XC70 Owner's Manual

Anti-lock Brake System (ABS)
If the warning lamp lights up there is a malfunction of the ABS
system (the standard braking system will however function) and the
vehicle should be driven cautiously to a Volvo retailer for inspection.
The Anti-lock Braking System (ABS) helps to improve vehicle control
(stopping and steering) during severe braking conditions by limiting
brake lockup. When the system "senses" impending lockup, braking
pressure is automatically modulated in order to help prevent lockup,
which could lead to a skid.
The system performs a self-diagnostic test when the engine is started
and when the vehicle first reaches a speed of approximately 12 mph
(20 km/h). The brake pedal will pulsate several times and a sound may
be audible from the ABS control module. This is normal.
To obtain optimal effect from the ABS system, constant pressure
should be kept on the brake pedal. Do not pump the brake pedal.
The switching of the ABS modulator will be audible and the brake pedal
will pulsate during braking. Please be aware that ABS does not increase
the absolute braking potential of the vehicle. While control will be
enhanced, ABS will not shorten stopping distances on slippery surfaces.
ABS with EBD (Electronic Brake Force Distribution)
EBD is an integrated part of the ABS system. EBD regulates the
hydraulic pressure to the rear brakes to help provide optimal braking
capacity. The brake pedal will pulsate during braking, which is normal.
If the BRAKE and ABS warning lights come on at the same
time, this could indicate a fault in the brake system.
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Anti-lock Brake System (ABS)
WARNING!
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Emergency Brake Assistance (EBA)