Volvo 2001 S80 - Manual (Page 30)

2001 Volvo S80
the brakes will be subjected to greater load than is normal.
pg. 17 ANTI-lock Brake System (ABS)
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,
keep constant pressure 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 at this time. 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.
If the BRAKE and ABS warning lights come on at the same time, this could indicate a fault in the
brake system.
· Stop the car in a suitable place and switch off the engine.
· Restart the engine.
· If both warning lights go off, no further action is required.
· If both lights are still on after the engine has been restarted, switch off the engine again and check the
brake fluid level (see
page 116 for the location of the brake fluid reservoir).
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