Volvo S90 2019 Owner's Manual page 385

Brakes
The brake pedal is used to apply the vehicle's
regular brakes, which are part of the brake
system.
The vehicle is equipped with two brake cir-
cuits. If one brake circuit is damaged, the
brake pedal will go down further when
depressed. More pressure will then be
required from the driver for normal braking
effect.
The driver's pressure on the brake pedal is
enhanced by a power braking function.
WARNING
Power braking only functions if the engine
is running.
If the brake pedal is used when the engine is
turned off, the pedal will feel stiffer than usual
and greater pressure must be applied to brake
the vehicle.
In very hilly areas or when driving with a heavy
load, manual gear shifting can be used to aug-
ment the brakes with engine braking. Engine
braking is most effective if the same gear is
used both uphill and downhill.
2 Anti-lock Braking System
Anti-lock brakes
The vehicle is equipped with an Anti-lock
2
Braking System (ABS ), which helps prevent
the wheels from locking and helps maintain
steering control when braking. Vibrations may
be felt from the brake pedal when ABS is
operating, which is normal.
After the vehicle is started, a brief test of the
ABS system is automatically performed when
the driver releases the brake pedal. An addi-
tional automatic test of the system may be
performed when the vehicle is traveling at a
low speed. During the test, the brake pedal
may feel as though it is pulsating.
STARTING AND DRIVING
Symbols in the instrument panel
Symbol Meaning
Check the brake fluid level. If the
level is low, fill brake fluid and
check to determine the reason
for the loss of brake fluid.
A
B
Steady glow for 2 seconds after
the engine is started: Automatic
function check.
Steady glow for more than 2
A
seconds: Fault in the ABS sys-
tem. The vehicle's regular brake
system is still working, but with-
out the ABS function.
B
A In Canada.
B In the US.
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