Starting and driving -> Brakes for Your Volvo Xc90 SUV 2020

STARTING AND DRIVING  
Brake functions  
Brakes  
Anti-lock brakes  
The vehicle is equipped with an Anti-lock  
Braking System (ABS2), 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.  
The vehicle's brakes are used to reduce  
speed or prevent the vehicle from rolling.  
In addition to the wheel brakes and parking  
brakes, the vehicle is also equipped with a  
number of automatic brake assist functions.  
These systems provide assistance by e.g. the  
driver not needing to depress the brake pedal  
at a traffic light, when starting up a hill or  
when driving down a hill.  
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.  
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.  
Depending on how the vehicle is equipped,  
the following brake assist functions may be  
included:  
The driver's pressure on the brake pedal is  
enhanced by a power braking function.  
Auto-hold brake function at a standstill  
(Auto Hold)  
WARNING  
Power braking only functions if the engine  
is running.  
Hill Start Assist (Hill Start Assist)  
Braking assist after a collision  
City Safety  
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.  
Hill Descent Control (Hill Descent  
Control)*  
Related information  
In very hilly areas or when driving with a heavy  
load, engine braking in manual gear should be  
used to augment the brakes. Engine braking is  
most effective if the same gear is used both  
uphill and downhill. Use the Off Road* drive  
mode to increase the engine braking effect  
when driving on steep downgrades at low  
speeds.  
Parking brake (p. 398)  
Auto-hold brakes (p. 401)  
Braking assist after a collision (p. 403)  
Hill Start Assist (p. 403)  
City Safety(p. 323)  
Hill Descent Control* (p. 425)  
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* Option/accessory. 395  
 
STARTING AND DRIVING  
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Symbols in the instrument panel  
Brake Assist System  
WARNING  
The brake enhancing system, (BAS3), helps  
increase braking force and can thereby  
reduce braking distance.  
Symbol Meaning  
If the warning symbols for both brake fault  
and ABS fault are lit simultaneously, there  
may be a fault in the brake system.  
Check the brake fluid level. If the  
level is low, fill brake fluid and  
check to determine the reason  
The system monitors the driver's braking hab-  
its and increases braking force when neces-  
sary. Braking force can be increased up to the  
point at which the ABS intervenes. The func-  
tion is deactivated when pressure on the brake  
pedal is decreased.  
If the brake fluid reservoir level is nor-  
mal when this occurs, drive carefully to  
the nearest workshop to have the  
brake system checked - an authorized  
Volvo workshop is recommended.  
for the loss of brake fluid.  
A
If the brake fluid has fallen below the  
MIN level in the brake fluid reservoir,  
the vehicle should not be driven until  
the brake fluid has been filled. The rea-  
son for the brake fluid loss must be  
checked.  
B
When BAS is activated, the brake pedal  
will go down slightly more than usual.  
Press (hold) down the brake pedal as long  
as necessary.  
Steady glow for 2 seconds after  
the engine is started: Automatic  
function check.  
Steady glow for more than 2  
When the brake pedal is released, all brak-  
ing ceases.  
Related information  
A
seconds: Fault in the ABS sys-  
tem. The vehicle's regular brake  
system is still working, but with-  
out the ABS function.  
Auto-hold brakes (p. 401)  
Related information  
Hill Start Assist (p. 403)  
B
A
In Canada.  
In the US.  
B
Brake lights (p. 161)  
2
Anti-lock Braking System  
Brake Assist System  
3
396  
 
STARTING AND DRIVING  
Braking on wet roads  
Braking on salted roads  
Maintenance of the brake system  
Regularly check the brake system compo-  
nents for wear.  
Prolonged driving in heavy rain without brak-  
ing may cause braking effect to be slightly  
delayed the first time the brakes are applied.  
This may also occur after washing the vehicle.  
It will then be necessary to apply greater pres-  
sure to the brake pedal. You should therefore  
maintain a greater distance to the vehicle  
ahead.  
When driving on salted roads, a layer of salt  
may form on the brake discs and brake pads.  
This could increase stopping distance. Main-  
tain an extra large safety distance to the vehi-  
cle ahead. Make sure to also:  
To keep the vehicle as safe and reliable as  
possible, follow the Volvo service schedule  
specified in the Warranty and Maintenance  
Records Information booklet. After replacing  
brake pads and brake discs, braking effect is  
not adapted until they are "broken in" by driv-  
ing a few hundred kilometers (miles). Com-  
pensate for the reduced braking effect by  
applying greater pressure to the brake pedal.  
Volvo recommends only using brake pads  
approved for your Volvo.  
Apply the brakes from time to time to help  
remove salt. Make sure braking does not  
pose a risk to any other road users.  
Firmly apply the brakes after washing the  
vehicle or driving on wet roads. This helps  
warm up the brake discs, enabling them to dry  
more quickly and protecting them against cor-  
rosion. Consider the current traffic situation  
when braking.  
Gently apply the brakes when you have  
finished driving and before driving again.  
Related information  
Related information  
The brake system's components should be  
regularly checked for wear.  
Contact a workshop for advice on how to  
do this or let a workshop perform the  
inspection - an authorized Volvo workshop  
is recommended.  
Related information  
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