Volvo S90 Owner's Manual page 412

STARTING AND DRIVING
|| be felt in the brake pedal when this is engaged
and this is normal.
A short test of the ABS system is made automat-
ically after the car has been started when the
driver releases the brake pedal. A further auto-
matic test of the system may be made at low
speed. The test may be felt as pulses in the
brake pedal.
Symbols in the driver display
Symbol Specification
Check the brake fluid level. If the
level is low, fill with brake fluid and
check for the cause of the brake
fluid loss.
Constant glow for 2 seconds when
the engine is started: Automatic
function check.
Constant glow for more than 2
seconds: Fault in the ABS system.
The car's normal brake system is
still working, but without the ABS
function.
Brake Assist System
3
410
WARNING
If both the warning lamps for brake fault and
ABS fault illuminate at the same time, a fault
has occurred in the brake system.
If the level in the brake fluid reservoir is
•
normal at this stage, drive carefully to the
nearest workshop and have the brake
system checked - an authorised Volvo
workshop is recommended.
If the brake fluid is below the MIN level in
•
the brake fluid reservoir, do not drive fur-
ther before topping up the brake fluid.
The reason for the loss of brake fluid
must be investigated.
Related information
Brake assistance (p. 410)
•
Automatic braking when stationary (p. 415)
•
Help when starting on a hill (p. 416)
•
Braking on wet roads (p. 411)
•
Braking on gritted roads (p. 411)
•
Brake system maintenance (p. 411)
•
Brake lights (p. 158)
•
Brake assistance
3
The brake assist system (BAS ) helps to
increase brake force during braking, and can
thereby shorten the braking distance.
The system detects the way in which the driver
brakes and increases brake force where neces-
sary. The brake force can be boosted up to the
level when the ABS system is engaged. The
function is suspended when the pressure on the
brake pedal decreases.
NOTE
When BAS is activated the brake pedal low-
ers slightly more than usual, depress (hold)
the brake pedal as long as necessary.
When the brake pedal is released, all braking
ceases.
Related information
Foot brake (p. 409)
•