water pump VOLVO S90 1998 Owners Manual

1998 Volvo S90
Chapter 4 (cont)
Brake system
pg. 67


If one of the brake
circuits should
malfunction, the red
warning light will come
on


The pedal stroke increases
slightly, the pedal feels softer
and extra pressure is required for
normal braking.
If the light comes on while
driving or braking, stop
immediately and check the brake
fluid level in the reservoir.

WARNING!
If the fluid level is below the
MIN mark in either section
of the reservoir: DO NOT
DRIVE. Tow the car to a
Volvo retailer and have the
brake system checked and
repaired.




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

The system performs a self-
diagnostic test when the vehicle
is started and at 4 mph (6 km/h).
The driver may detect one
pulsation of the brake pedal,
which is normal.
To obtain optimal effect from
the ABS system, constant
pressure should be kept on the
brake pedal while the system
is modulating the brakes. Do
not pump the brake pedal.
The switching of the ABS
modulator will be audible 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.

Moisture on brake
discs and brake pads
affects braking.


Driving in rain and slush or
passing through an automatic car
wash can cause water to collect
on the brake discs and pads.
This will cause a delay in
braking effect when the pedal is
depressed. To avoid such a delay
when the brakes are needed,
depress the pedal occasionally
when driving through rain, slush
etc. This will remove the water
from the brakes. Check that
Severe strain on the
brake system


The brakes will be subject to
severe strain when driving in
mountains or hilly areas or
towing. The speed is usually low
which means that the cooling of
the brakes is less efficient than
when driving on level roads. To
reduce the strain on the brakes it
is advisable not to use the brakes
excessively. Instead, shift into a
lower gear, position 3 or in some
cases L ,and let the engine help
with the braking.
Do not forget that, if you are
towing a trailer, the brakes will
be subjected to greater load than
is normal.

If the brake power-
assist does not
function


The power assist to the brakes
functions only when the engine
is running. When the car is
moving without the engine
running the brake pedal pressure
required to stop the car is
increased by 3-4 times.
The brake pedal feels stiff and
hard.
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