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Volvo V90 Twin Engine (2018 year). Instruction - part 24

STARTING AND DRIVING

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413

Using jump starting with another

battery

If the starter battery is discharged then the car
can be started with current from another battery.

Charging point for jump-starting own car.

IMPORTANT

The car’s charging point is only intended for
jump-starting the car itself. The charging
point is not intended for jump-starting
another car. Using the charging point to jump
start another car may cause a fuse to blow,
which means the charging point will stop
working.

When a fuse has blown the message

12 V

Battery

Fuse failure Service required

shown in the driver display. Volvo recommends
that an authorised Volvo workshop is contacted.

When jump-starting the car, the following steps
are recommended to avoid short circuits or other
damage:

1. Set the car's electrical system in ignition

position 0.

2. Check that the donor battery has a voltage of

12 V.

3. If the donor battery is installed in another car

- switch off the donor car's engine and make
sure that the two cars do not touch each
other.

4. Connect one of the red jump lead's clamps

to the donor battery's positive terminal (1).

IMPORTANT

Connect the start cable carefully to avoid
short circuits with other components in the
engine compartment.

5. Open the positive jump-starting point's cover

(2).

6. Connect the red jump lead's other clamp

onto the car's positive jump-starting point
(2).

7. Connect one of the black jump lead's clamps

to the donor battery's negative terminal (3).

8. Connect the black jump lead's other clamp

onto the car's negative jump-starting point
(4).

9. Check that the jump lead clamps are affixed

securely so that there are no sparks during
the starting attempt.

10. Start the engine of the "donor car" and allow

it to run a few minutes at a speed slightly
higher than idle approx. 1500 rpm.

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11. Start your own car's engine. If the start

attempt fails then extend the charging time
to 10 minutes, and then make a new start
attempt.

NOTE

When starting the engine in normal condi-
tions the car's electric drive motor is priori-
tised - the petrol engine remains switched off.
This means that after the start knob is turned
clockwise, the electric motor has "started"
and the car is ready to drive. A started motor
is indicated by the driver display's indicator
lamps extinguishing and its preset theme illu-
minating.

IMPORTANT

Do not touch the connections between cable
and car during the starting attempt. There is a
risk of sparks forming.

12. Remove the jump leads in reverse order -

first the black and then the red.

Make sure that none of the black jump lead's
clamps comes into contact with the car's
positive jump-starting point/donor battery's
positive terminal or the clamp connected to
the red jump lead.

WARNING

•

The battery can generate oxyhydrogen
gas, which is highly explosive. A spark can
be formed if a jump lead is connected
incorrectly, and this can be enough for
the battery to explode.

•

Do not connect the jump leads to any
fuel system component or any moving
part. Be careful of hot engine parts.

•

The battery contains sulphuric acid, which
can cause serious burns.

•

If sulphuric acid comes into contact with
eyes, skin or clothing, flush with large
quantities of water. If acid splashes into
the eyes - seek medical attention imme-
diately.

•

Never smoke near the battery.

NOTE

The car cannot be started if the hybrid battery
is discharged.

Related information

•

Starter battery (p. 564)

•

Ignition positions (p. 409)

•

Starting the car (p. 410)

•

Opening and closing the bonnet (p. 553)

•

Charging the hybrid battery (p. 454)

Gearbox

The gearbox is part of the car's powertrain
(power transmission) between engine and drive
wheels. The function of the gearbox is to change
the gear ratio depending on speed and power
requirements.

The car has an eight-speed automatic gearbox,
and an electric motor for rear-wheel drive. The
number of gear changes means that the engine's
torque and power range can be used effectively.
Two of the gears are overdrive gears that save
fuel when driving at constant engine speed.
Using the steering wheel paddles

* it is possible

to shift up or down manually. The driver display
shows which gear position is currently in use.

IMPORTANT

To prevent damage to any drive system com-
ponents, the working temperature of the
gearbox is checked. If there is a risk of over-
heating, a warning symbol illuminates in the
driver display and a text message is shown -
follow the recommendation given.

Symbols in the driver display

If a fault should occur in the gearbox, the driver
display shows a symbol and a message.

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Symbol

Specification

Information or error message for
gearbox. Follow the recommenda-
tion given.

Hot or overheated gearbox. Follow
the recommendation given.

Reduced performance

Acceler-

ation performance reduced

In the event of a temporary power-
train fault, the car can go into a
Limp home mode with reduced
engine power to prevent damage
to the powertrain.

Related information

•

Gear positions for automatic gearbox
(p. 415)

•

Gear shift indicator

* (p. 418)

•

Changing gear with steering wheel paddles

(p. 419)

Gear positions for automatic

gearbox

With an automatic gearbox, the system chooses
the gear so that driving is optimal. The gearbox
also has a manual gearshift mode.

Gear positions in the driver display

The driver display shows the gear selector's posi-
tion:

During manual gear changing, the gear being
used is also shown (1-8).

Changing gear

The gear selector is the Shift-by-wire type where
gear changing is performed electronically rather
than mechanically. This means easier gear
changing and more distinct gear positions.

Change gear position by pressing the spring-loa-
ded gear selector forwards or backwards.

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416

Gear positions

Park position - P

The park position is activated via the P button
next to the gear selector.

Select the P position when the car is parked or
when starting the engine. The car must be sta-
tionary when the park position is selected.

To select another gear position when the park
position is selected, the brake pedal must be
depressed and the ignition position must be II.

The gearbox is mechanically blocked when the P
position is engaged. Apply the parking brake first
when the car is parked.

WARNING

Always use the parking brake when parking

on an inclined surface. Engaging a gear or the

automatic transmission's P position is not suf-

ficient to hold the car stationary in all situa-

tions.

NOTE

The gear selector must be in P position to
allow the car to be locked and alarmed.

Help functions:

The system will change to P position automati-
cally:

•

if the car is switched off in position D or R.

•

if the driver unfastens the seatbelt and opens
the driver's door when the engine is running
with the gear selector in a position other
than P.

Reverse position - R

Select position R to reverse. The car must be sta-
tionary when reverse position is selected.

Neutral position - N

No gear is engaged and the engine can be
started. Apply the parking brake if the car is sta-
tionary with the gear selector in N position.

To be able to change from the neutral position to
another gear position, the brake pedal must be
depressed and the ignition position must be II.

Drive position - D

D is the normal driving position. Shifting up and
down takes place automatically based on the
level of acceleration and speed. The car must be
stationary when changing gear from R position to
D position.

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Brake position - B

B can be selected at any time while driving. In the
B position the car brakes with the electric motor
when the accelerator pedal is released while the
hybrid battery is charging. This gives more oppor-
tunities for recharging the hybrid battery, since
charging also takes place without the driver using
the brake pedal.

B-position in the driver display.

From the B position it is possible to change gear
manually to lower gears. The driver display shows
which gear (1 - 8) is being used.

•

Press the gear selector backwards once to
change down to the next lower gear.

•

Press the gear selector backwards once
more to change down further.

To be able to change manually to a higher gear
requires that the car is equipped with steering
wheel paddles

•

Press the gear selector forwards to return to
the D position.

The gearbox automatically shifts down if the
speed decreases to a level lower than appropri-
ate for the selected gear, in order to avoid jerking
and stalling.

Kick-down

When the accelerator pedal is pressed all the
way to the floor (beyond the position normally
regarded as full acceleration) a lower gear is
immediately engaged. This is known as kick-
down.

If the accelerator is released from the kick-down
position, the gearbox automatically changes up.

Kick-down is used when maximum acceleration
is needed, such as for overtaking.

Safety function

To prevent over-revving of the engine, the gear-
box control program has a protective downshift
inhibitor.

The gearbox does not permit downshifting/kick-
down which would result in an engine speed high
enough to damage the engine. Nothing happens
if the driver still tries to shift down in this way at
high engine speed – the original gear remains
engaged.

When kick-down is activated the car can change
one or more gears at a time depending on
engine speed. The car changes up when the
engine reaches its maximum speed in order to
prevent damage to the engine.

Related information

•

Gearbox (p. 414)

•

Changing gear with steering wheel paddles

(p. 419)

•

Gear shift indicator

* (p. 418)

•

Gear selector inhibitor (p. 418)

•

Ignition positions (p. 409)

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418

Gear shift indicator

The gear shift indicator in the driver display
shows the current gear during manual gearshift-
ing and when it is appropriate to engage the
next gear for optimum fuel economy.

For eco-driving during manual gear changing, it is
important to drive in the right gear and to change
gear in good time.

The gear shift indicator shows the current gear in
the driver display and uses an up arrow to indi-
cate when shifting to a higher gear is recom-
mended. The gear shift indicator is shown in gear
position B.

Gear shift indicator in the driver display

Related information

•

Gearbox (p. 414)

•

Gear positions for automatic gearbox
(p. 415)

Gear selector inhibitor

The gear selector inhibitor prevents accidental
changing between different gear positions in an
automatic gearbox.

Automatic gear selector inhibitor

The automatic gear selector inhibitor has special
safety systems.

From park position - P

To be able to move the gear selector from the P
position, the brake pedal must be depressed and
the ignition position must be II.

From neutral position - N

If the gear selector is in the N position and the
car has been stationary for at least 3 seconds
(irrespective of whether the engine is running)
then the gear selector is locked.

To be able to move the gear selector from the N
position to another gear position, the brake pedal
must be depressed and the ignition position must
be II.

Message in the driver display

If the gear selector is inhibited, a message is
shown in the driver display, e.g.

Gear lever

Press brake pedal to activate gear lever

The gear selector is not inhibited mechanically.

The figure is schematic, the layout may vary depending on car model or updated software.

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419

Related information

•

Gear positions for automatic gearbox
(p. 415)

•

Ignition positions (p. 409)

Changing gear with steering wheel

paddles

The steering wheel paddles are a complement
to the gear selector and make it possible to
change gear manually without releasing hands
from the steering wheel.

Activating the steering wheel paddles

To be able to change gear with the steering
wheel paddles they must first be activated:

–

Pull one of the paddles toward the steering
wheel.
> A figure in the driver display indicates cur-

rent gear.

Driver display when changing gear with steering wheel

paddles.

Changing gear

To change gear one step:

–

Pull one of the paddles backwards - towards
the steering wheel - and release.

"-": Selects the next lower gear.

"+": Selects the next higher gear.

A gear change occurs at each pull of the paddle
provided that the engine speed does not leave
the permitted range.

After each gear change the figure in the driver
display changes to show the current gear.

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Deactivating the function

Manual deactivation in gear position D and B
–

Deactivate the steering wheel paddles by
pulling the right-hand paddle (+) toward the
steering wheel and holding in place until the
figure in the driver display for the current
gear extinguishes.
> The gearbox returns to gear position D

and B depending on the position selected
before the paddles were activated.

Automatic deactivation

In gear position D the steering wheel paddles are
deactivated after a short time if they are not used.
This is indicated by means of the figure for the
current gear extinguishing.

In gear position B there is no automatic deactiva-
tion.

Related information

•

Gear positions for automatic gearbox
(p. 415)

•

Gear shift indicator

* (p. 418)

Drive systems

Volvo's Twin Engine combines an internal com-
bustion engine that drives the front wheels with
an electric motor that drives the rear wheels.

Two drive systems

Depending on the driver-selected drive mode and
available electric energy, the two drive systems
can be used either individually or in parallel.

The electric motor is supplied its energy from a
hybrid battery fitted in the tunnel console. The
hybrid battery can be charged in a wall socket, or
in a special charging station. The internal com-
bustion engine can also charge the hybrid battery
with a special high-voltage generator.

Both the internal combustion engine and electric
motor can generate motive force directly to the
wheels. An advanced control system combines
the properties of both drive systems in order to
provide optimum driving economy.

Hybrid battery - The function of the hybrid
battery is to store energy. It receives energy
when charging from the mains power circuit,
during regenerative braking or from the high-
voltage generator. It provides energy for elec-
tric operation as well as for temporarily oper-
ating the electric air conditioning during the
preconditioning of the passenger compart-
ment.
Internal combustion engine - The internal
combustion engine starts when the energy
level in the hybrid battery is insufficient for
the engine power that the driver requests.
High voltage generator

- Charges the hybrid

battery. Starter motor for the internal com-
bustion engine. Can support the internal

CISG (Crank Integrated Starter Generator) - Combined high-voltage generator and starter motor.

STARTING AND DRIVING

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421

combustion engine with extra electrical
energy.
Electric motor - Powers the car in electric
operation. If necessary, provides extra torque
and power during acceleration. Provides
electrical all-wheel drive functionality. Recy-
cles brake energy to electrical energy.

Related information

•

General information about Twin Engine
(p. 55)

•

Drive modes (p. 421)

•

Starting and stopping the combustion engine
in Twin Engine (p. 443)

Drive modes

Selection of drive mode affects the car's driving
characteristics in order to enhance the driving
experience and facilitate driving in special situa-
tions.

Using the drive modes it is possible to quickly
have access to the car's numerous functions and
settings for different driving needs. The following
systems are adapted to obtain the best possible
driving characteristics in each respective drive
mode:

•

Steering

•

Engine/gearbox/all-wheel drive

•

Brakes

•

Shock absorption

•

Driver display

•

Climate settings

Select the drive mode that best suits the current
driving conditions. Remember that not all drive
modes are available in all situations.

Selecting drive mode

1. Press the drive mode control DRIVE MODE.

> A pop-up menu is opened in the centre

display.

2. Roll the wheel upward or downward until the

desired drive mode is highlighted.

3. Press the drive mode control or tap directly

on the touch screen to confirm the selection.
> The selected drive mode is indicated in

the driver display.

A message is shown when a drive mode is unse-
lectable.

For example:

•

Cannot be selected because gear is in
manual

•

Cannot be selected due to low battery

STARTING AND DRIVING

422

•

Cannot be selected due to low
temperature

•

Cannot be selected due to limitations

•

Cannot be selected because speed is
too high

Selectable drive modes

WARNING

Remember that the car does not emit any

engine noise when it is only powered by the

electric motor and may therefore be difficult

to notice by children, pedestrians, cyclists and

animals. This applies in particular at low

speeds, such as in car parks.

WARNING

Do not leave the car in an unventilated area

with activated drive mode and the fuel-driven

engine switched off - automatic engine start

occurs at low energy level in the hybrid bat-

tery, and the exhaust gases could then cause

serious injury to people and animals.

HYBRID

•

This is the car's normal mode where the
electric motor and internal combustion
engine work together.

When the car starts, it is in the Hybrid mode. The
control system uses both the electric motor and
internal combustion engine - individually or in

parallel - and calculates optimal use with regard
to performance, fuel consumption and comfort.
The capacity to run solely with the electric motor
depends on the hybrid battery's energy level and,
for example, the need for heating/cooling in the
passenger compartment.

If high power output is available, it is possible to
drive with electrical power alone. When the accel-
erator pedal is depressed, only the electric motor
is activated until a certain position is reached.
The internal combustion engine starts when this
position is exceeded and the energy level in the
battery is insufficient for the engine power that
the driver requests with the accelerator pedal.

At low energy level (hybrid battery almost empty)
the battery's energy level must be maintained,
leading to the internal combustion engine star-
ting more often. Charge the hybrid battery from a
230 VAC socket with the charging cable, or acti-
vate

Charge

in the function view in order to

restore the capacity to drive on electric power
alone, see the section "Maintain or increase the
hybrid battery's state of charge while driving".
The drive mode is designed for low energy con-
sumption with an optimised mix of the electric
motor and the internal combustion engine, with-
out compromising the climate comfort and driving
experience. When higher acceleration is required,
maximum additional power from the electric drive
line is used. The car also senses if the driving
conditions require all-wheel drive and automati-
cally engages it if necessary. All-wheel drive and

electric additional power are always available
regardless of the battery's state of charge.

Information in the driver display

When driving in hybrid mode the driver display
shows a hybrid gauge. The pointer in the hybrid
gauge indicates how much energy the driver
requests with the accelerator pedal. The marking
between the lightning bolt and the drop shows
how much energy is available. Read more about
the hybrid symbols in the section "Hybrid related
information in the driver display".

The driver display for propulsion with both the electric

motor and internal combustion engine.

The driver display also shows when
energy is returned to the battery
(regenerated) during light braking.
More information on regeneration is

available in the section "Foot brake".

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423

PURE

•

Drive the car with electric motor, with energy
consumption as low as possible and with
lowest possible carbon dioxide emissions.

The drive mode maximises driving on the hybrid
battery. This means, for example, that the output
of certain climate settings is reduced to provide
the longest possible mileage on electric power
alone.

The Pure mode is available when the hybrid bat-
tery has a sufficiently high energy level. The inter-
nal combustion engine also starts in the Pure
mode if the energy level in the battery falls too
low. The internal combustion engine also starts

•

if the speed exceeds 125 km/h (78 mph)

•

if the driver requests more motive force than
electric drive can provide

•

in the event of system/component limita-
tions, e.g. low outside temperature.

The drive mode is optimised for maximum range
with electric propulsion and especially developed
for urban traffic. Pure means lowest combustion
even when the hybrid battery is empty. The cli-
mate in the passenger compartment is regulated
to ECO climate, and in slippery driving conditions,
more wheel spin can be permitted before all-
wheel drive is activated automatically.

ECO climate control

In the

Pure

drive mode, ECO climate control is

activated automatically in the passenger com-
partment in order to reduce energy consumption.

NOTE

When the

Pure

drive mode is activated, sev-

eral parameters in the climate control sys-
tem's settings are changed, and several elec-
tricity consumer functions are reduced. Cer-
tain settings can be reset manually, but full
functionality is only regained by leaving

Pure

drive mode or adapting

Individual

drive mode

with full climate functionality.

In the event of difficulties due to misting, press
the button for max. defroster which has normal
functionality.

AWD

•

Improve the car's roadholding and traction
with enhanced all-wheel drive.

The drive mode locks the car in all-wheel drive.
An optimal distribution between the front and
rear axle torque gives the best traction, stability
and roadholding, for example on slippery roads,
when driving with a heavy trailer, or when towing.
AWD drive mode is always available regardless of
the battery's state of charge.

Both the internal combustion engine and electric
motor are engaged in order to drive all four

wheels, which results in increased fuel consump-
tion.

In the car's other drive modes, the car automati-
cally adapts the need for all-wheel drive to the
road surface, and can engage the electric motor
or start the internal combustion engine when
necessary.

POWER

•

Power mode means that the car has sportier
characteristics and faster response to accel-
erating.

The drive mode maximises the combined power
from the internal combustion engine and electric
motor by means of the car being driven by both
front and rear wheels. The gear changes become
faster and more distinct, and the gearbox prioriti-
ses a gear with greater traction. Steering
response is faster and shock absorption is
harder.

Both the internal combustion engine and electric
motor are engaged in order to drive all four
wheels, which results in increased fuel consump-
tion.
The drive mode is optimised for maximum per-
formance and response during acceleration. It
changes the internal combustion engine's accel-
erator pedal response, gear shift pattern and
boost pressure system. Chassis settings, steering
and brake response are also optimised. Power
drive mode is always available regardless of the
battery's state of charge.

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424

INDIVIDUAL

•

Adapting a drive mode according to individ-
ual preferences.

Select a drive mode to start from, and then adjust
the settings according to the desired driving cha-
racteristics. These settings are saved in an indi-
vidual driver profile.

An individual drive mode is only available if it is
first activated in the centre display.

Settings view

for individual drive mode.

1. Press

Settings

in the top view.

2. Press

My Car

Individual Drive Mode

and

select

Individual Drive Mode

3. In

Presets

, select a drive mode to start from:

Pure

Hybrid

Power

Possible adjustments apply to settings for:

•

Driver Display

•

Steering force

•

Powertrain Characteristics

•

Brake Characteristics

•

Suspension Control

•

ECO Climate

Using the internal combustion engine

An advanced control system determines the
extent to which the car is driven on internal com-
bustion engine, electric motor or both in parallel.

The primary function is to use the engine or
motor and the available energy in the hybrid bat-
tery as efficiently as possible, with regard to the
characteristics of the different drive modes as
well as the driver's request for power via the
accelerator pedal.

There are also cases where temporary limitations
in the system, or functions governed by legal
requirements aimed at maintaining a low level of
total emissions for the car, may use the internal
combustion engine to a greater extent.

The figure is schematic, the layout may vary depending on car model or updated software.

STARTING AND DRIVING

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* Option/accessory.

425

Related information

•

Speed-dependent steering force (p. 276)

•

Level control

* and shock absorption (p. 426)

•

Foot brake (p. 427)

•

All-wheel drive (p. 427)

•

Starting and stopping the combustion engine
in Twin Engine (p. 443)

•

Setting the time interval for the adaptive
cruise control

* (p. 302)

Maintain or increase the hybrid

battery's state of charge while

driving.

In some situations, it can be useful to be able to
control the hybrid battery's state of charge while
driving is in progress. The

Hold

and

Charge

functions are available in all drive modes.

"Hold" and "Charge" function buttons

These functions are activated in the centre dis-
play's function view.

Hold

Battery level sustained for
later use

The function maintains the
charge in the hybrid battery for
electric operation saves availa-
ble electrical energy for later

use, e.g. for driving in an urban environment or
through a residential area.

Hold

is available

regardless of the hybrid battery's state of charge.

The car works as for normal hybrid operation with
discharged battery where, in addition to re-using
brake-generated energy, for example, the car
starts the internal combustion engine more often
in order to maintain the charge in the battery.

Charge

Engine charges hybrid
battery

The function charges the hybrid
battery with support from the
internal combustion engine for
using increased electric opera-

tion at a later time. The function is not available
when the hybrid battery already has a high
charge level.

Symbol in the driver display

Hold

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* Option/accessory.

426

Charge

The

symbol is shown in the hybrid battery

gauge when

Hold

is activated and

when

Charge

is activated.

Related information

•

Economical driving (p. 442)

•

Drive modes (p. 421)

•

Electric operation range in urban environ-
ment (p. 444)

Level control

* and shock absorption

Level control and shock absorption are regula-
ted automatically in the car.

With rear level control, the car maintains the
same height at the rear regardless of load. Level
control can also occur even after the car has
been parked.

Shock absorption (Four-C)

The shock absorption is adapted according to the
selected drive mode and according to the speed
of the car. Shock absorption is normally set for
the best possible comfort and is regulated con-
tinuously depending on the road surface, the
car's acceleration, braking and cornering.

Settings for level control

Deactivation of air suspension and level
control

In certain cases, the function must be deacti-
vated, e.g. before the car is raised with a jack

The difference in level created by raising the car
with a jack can otherwise cause problems for the
air suspension.

Deactivating the function via the centre display:

1. Press

Settings

in the top view.

2. Press

My Car

Parking Brake and

Suspension

3. Select

Disable Leveling Control

During transport

During transport of the car on a ferry, train or
truck, the car must be lashed around the tyres
and not around other parts of the chassis.
Changes in the air suspension may occur during
transport, which could affect the lashing nega-
tively.

Related information

•

Drive modes (p. 421)

•

Recommendations for loading (p. 225)

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427

All-wheel drive

All-wheel drive, AWD (All Wheel Drive), means
that the car is driving all four wheels at the same
time, which improves traction.

The electric motor that drives the rear wheels
enables electric all-wheel drive functionality.

To achieve the best possible traction and prevent
wheel spin the motive force is distributed auto-
matically to the wheels with the best grip. The
system continuously calculates the need for tor-
que to the rear wheels, and can immediately
redistribute up to half of the motor's torque to the
rear wheels.

All-wheel drive also has a stabilising effect at
higher speeds. Under normal driving conditions,
the majority of power is transmitted to the front
wheels. When stationary, the all-wheel drive is
always engaged in preparation for maximum trac-
tion during acceleration.

All-wheel drive characteristics vary depending on
the selected drive mode.

Related information

•

Drive modes (p. 421)

Brake functions

The car's brakes are used to reduce the speed
or prevent the car from rolling.

Besides the foot brake and parking brake, the car
is equipped with several automatic brake assist
functions. These can assist the driver by not
needing to keep his/her foot on the brake pedal
when stationary at a traffic light, when starting on
an uphill gradient or when driving on a downhill
gradient.

Depending on the car's equipment, the following
auto braking functions are available:

•

Automatic braking when stationary (Auto
Hold)

•

Hill start assist (Hill Start Assist)

•

Auto braking after a collision

•

City Safety

Related information

•

Foot brake (p. 427)

•

Parking brake (p. 431)

•

Hill start assist (p. 434)

•

Automatic braking when stationary (p. 434)

•

Auto braking after a collision (p. 430)

Foot brake

The foot brake is part of the brake system.

The car is equipped with two brake circuits. If a
brake circuit is damaged, the brake pedal will
engage deeper. Higher pressure on the pedal will
therefore be needed to produce the normal brak-
ing effect.

WARNING

In a de-energised car with the electric motor

and fuel-driven engine switched off it is not

possible to brake the car.

In very hilly terrain or when driving with a heavy
load, the brakes can be relieved by using engine
braking in gear position B.

Anti-lock braking system

The car has anti-lock brakes, Anti-lock Braking
System (ABS), which can prevent the wheels
from locking while braking and allows maintained
steering control. Vibration may be felt in the
brake pedal when this is engaged and this is nor-
mal.

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.

STARTING AND DRIVING

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Light braking charges the hybrid battery

The electric motor's engine brake is used during
light braking. The car's kinetic energy is then
converted to electrical energy instead, which is
used to charge the hybrid battery. Battery charg-
ing with electric motor braking is indicated in the
driver display, see the section "Hybrid related
information in the driver display".

This function is active in the speed interval
150-5 km/h (93-3 mph). During heavier braking,
as well as outside the speed interval, braking is
supplemented by the hydraulic brake system. The
driver's display shows this by the indicator being
down in the red zone.

The driver display indicates charging during electric

motor braking.

Braking on wet roads

When driving for a prolonged period of time in
heavy rain without braking, the braking effect may

be delayed slightly when next using the brakes.
This may also be the case after a car wash. It is
then necessary to depress the brake pedal more
forcefully. You should therefore maintain a
greater distance to the vehicles in front.

Brake the car firmly after driving on wet roads or
using a car wash. This warms up the brake discs,
enabling them to dry faster and protecting them
against corrosion. Bear in mind the current traffic
situation when braking.

Braking on salted roads

When driving on salted roads, a layer of salt may
form on the brake discs and brake linings. This
may extend braking distance. You should there-
fore maintain a greater safety distance to vehi-
cles in front. In addition, make sure you do the
following:

•

Brake now and again to remove any layer of
salt. Make sure that other road users are not
put at risk by the braking.

•

Gently depress the brake pedal after finish-
ing driving and before starting your next trip.

Maintenance

To keep the car as safe and reliable as possible,
follow the Volvo service intervals as specified in
the Service and Warranty Booklet.

New and replaced brake linings and brake discs
do not provide optimal braking effect until they
have been "worn in" a few hundred kilometres.

Compensate for the reduced braking effect by
depressing the brake pedal harder. Volvo recom-
mends only fitting brake linings that are approved
for your Volvo.

IMPORTANT

The wear on the brake system's components
must be checked regularly.

Contact a workshop for information about the
procedure or engage a workshop to carry out
the inspection - an authorised Volvo work-
shop is recommended.

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.

Fault in pedal sensor.

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