Volvo S90 (2021 year). Manual in english — page 28

STARTING AND DRIVING

476

Checking and filling with AdBlue

®

Check the AdBlue level regularly and top up if
the message for low AdBlue level is shown in
the driver display.

The AdBlue consumption is dependent on
driving style, if the AdBlue tank is allowed to
drain completely then it will no longer be pos-
sible to start the car.

NOTE

Never run the AdBlue tank dry. Fill the tank
in good time before it is empty.

If the tank is run dry, it will not be possible
to start the engine after it is switched off –
not the regular way or using aids.

The only way to be able to restart after
driving the tank empty is to refill AdBlue of
specified quality, with the minimum being
the quantity shown in the driver display.

Checking AdBlue level

1.

Open the

Car Status

app in the app view.

2.

Press

Status

to show the AdBlue level.

Graphic for AdBlue level in the centre display.

Each cursor represents approx. 25% of a
full tank.

When less than 25 % of the tank remains
available, the colour of the remaining cur-
sor changes to amber, and at less than
10 % it turns red.

STARTING AND DRIVING

477

Filling with AdBlue

When the AdBlue level starts
to become low, a symbol illu-
minates in the driver display
and the

AdBlue level low

message is shown.

Do not overfill the tank. The amount of AdBlue
that can be filled is shown in the app

Car

Status

.

Use AdBlue of the correct quality

28

1. Open the fuel filler flap with a gentle press

on the rear of the flap.

2.

Open the blue cover for the smaller filler
pipe intended for AdBlue.

3. Fill slowly/in portions, in order to avoid air

pockets.

WARNING

When filling from the AdBlue pump at a fill-

ing station, it is advisable to use the pump

adapted for passenger cars. The AdBlue

pump for heavy vehicles can also be used.

IMPORTANT

Wipe away any spilled AdBlue.

Exercise caution to prevent AdBlue from
coming into contact with the car's paint-
work. If it does, rinse with plenty of water
since the fluid can affect the paintwork.

Related information

•

Handling AdBlue

®

(p. 475)

•

Symbols and messages for AdBlue

®

(p. 478)

•

Tank capacity for AdBlue

®

(p. 678)

28

ISO 22241

STARTING AND DRIVING

478

Symbols and messages for

AdBlue

®

29

The emission control system continuously
monitors the level, quality and dosage of
AdBlue. If something is wrong, a message is
shown in the driver display.

Symbol

Message

Specification

AdBlue level low

The AdBlue level is low and the tank needs to be topped up.

AdBlue dosing

and

AdBlue quality

The system does not function as it should. Contact a workshop

A

to check the function.

29

Registered trademark that belongs to Ver-band der Automobilindustrie e.V. (VDA)

STARTING AND DRIVING

479

Symbol

Message

Specification

Refill AdBlue

The AdBlue level is critically low and the tank needs to be topped up immediately.

Engine start prohibited

and e.g.:

Fill a minimum of 4.5

litres of AdBlue

The car cannot be started before AdBlue has been filled. Fill with AdBlue to the amount
specified in the driver display, or contact a workshop

A

.

Note that the car must be level for the level gauge to be able to correctly register the amount
of AdBlue filled.

When starting after filling AdBlue, follow the instructions regarding empty tank and diesel
engine.

Engine start prohibited

Service of AdBlue system nee-
ded to allow restart

The system does not function as it should. Contact a workshop

A

to check the function.

A

An authorised Volvo workshop is recommended.

Related information

•

Checking and filling with AdBlue

®

(p. 476)

•

Handling AdBlue

®

(p. 475)

•

Book service and repair (p. 605)

•

Empty tank and diesel engine (p. 472)

STARTING AND DRIVING

480

Overheating in the engine and

drive system

Under certain conditions, e.g. hard driving in
hilly terrain and hot climate, there is a risk
that the engine and drive system may over-
heat – in particular with a heavy load.

•

In the event of overheating, the engine's
power may be limited temporarily.

•

Remove any auxiliary lamps from in front
of the grille when driving in hot climates.

•

If the temperature in the engine's cooling
system becomes too high then a warning
symbol is illuminated and the driver dis-
play shows the message

Engine

temperature

High temperature Stop

safely

. Stop the car in a safe way and

allow the engine to run at idling speed for
several minutes and cool down.

•

If the message

Engine temperature

High temperature Turn off engine

or

Engine coolant

Level low, turn off

engine

is shown, stop the car and switch

off the engine.

•

In the event of overheating in the gearbox,
an alternative gear shift program will be
selected

30

. In addition, a built-in protec-

tion function is activated that, amongst
other things, illuminates a warning symbol
and the driver display shows the message

Transmission warm

Reduce speed to

lower temperature

or

Transmission hot

Stop safely, wait for cooling

. Follow the

recommendation given, reduce speed or
stop the car in a safe way and allow the
engine to run at idling speed for several
minutes to enable the gearbox to cool
down.

•

If the car overheats, the air conditioning
may be switched off temporarily.

•

Do not turn the engine off immediately
you stop after a hard drive.

NOTE

It is normal for the engine's cooling fan to
operate for a time after the engine has
been switched off.

Symbols in the driver display

Symbol Specification

High engine temperature. Follow
the recommendation given.

Low level, coolant. Follow the
recommendation given.

Gearbox hot/overheated/cooled.
Follow the recommendation
given.

Related information

•

Topping up coolant (p. 616)

•

Driving with a trailer (p. 487)

•

Preparations for a long trip (p. 465)

•

Gear shift indicator (p. 450)

30

Applies to automatic gearbox.

STARTING AND DRIVING

}}

481

Overloading the starter battery

The electrical functions in the car load the
starter battery to varying degrees. Avoid
using the ignition position

II

when the car is

switched off. Instead, use ignition position

I

-

which uses less power.

Also, be aware of different accessories that
load the electrical system. Do not use func-
tions which use a lot of power when the car is
switched off. Examples of such functions are:

•

ventilation fan

•

headlamps

•

windscreen wiper

•

audio system (high volume).

If the starter battery voltage is low, a message
is shown in the driver display. The energy-sav-
ing function then shuts down certain functions
or reduces certain functions such as the venti-
lation fan and/or audio system.

–

In which case, charge the starter battery
by starting the car and then running it for
at least 15 minutes - starter battery charg-
ing is more effective during driving than
running the engine at idling speed while
stationary.

Related information

•

Starter battery (p. 618)

•

Ignition positions (p. 430)

Using jump starting with another

battery

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

Attachment points for the jump leads. The appear-

ance in the engine compartment may vary depending

on car model and equipment level.

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 ter-
minal (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 ter-
minal (3).

8. Connect the black jump lead's other

clamp onto the car's negative jump-star-
ting point (4).

9. Check that the jump lead clamps are

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

||

STARTING AND DRIVING

482

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.

11. Start the engine in the car with the dis-

charged battery.

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

High voltage can be dangerous in the event

of incorrect intervention. Do not touch any-

thing on the batteries that is not clearly

described in the owner's manual.

•

48 V support battery must never be
used for jump-starting.

•

External electrical equipment must not,
under any circumstances, be con-
nected to the 48 V battery.

•

The 48 V battery may only be serviced
and replaced by a workshop – an
authorised Volvo workshop is recom-
mended.

WARNING

•

The battery can generate oxyhydrogen
gas, which is highly explosive. A spark
can be formed if a jump lead is con-
nected 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 immediately.

•

Never smoke near the battery.

STARTING AND DRIVING

}}

* Option/accessory.

483

NOTE

If the starter battery has been discharged
so much that the car has no normal electri-
cal functions and the engine is then jump-
started with an external battery or a battery
charger, the Start/stop function may con-
tinue to be activated. If the Start/stop
function then auto-stops the engine shortly
afterwards, there is a great risk that engine
auto-start will fail due to insufficient bat-
tery capacity, because the battery has not
had the time to recharge.

If the car has been jump-started, or if there
is insufficient time to charge the battery
with a battery charger, the Start/stop func-
tion is temporarily deactivated until the
battery has been recharged by the car. In
an outside temperature of approx. +15 °C
(approx. 60 °F), the battery needs to be
charged for at least 1 hour by the car. In a
lower outside temperature, the charging
time may increase to 3–4 hours. The rec-
ommendation is to charge the battery
using an external battery charger.

Related information

•

Starting the car (p. 428)

•

Ignition positions (p. 430)

•

Adjusting the steering wheel (p. 198)

•

Selecting ignition mode (p. 431)

•

Support battery (p. 620)

Towbar

*

The car can be equipped with a towbar that
makes it possible to tow e.g. a trailer behind
the car.

There may be different towbar variants availa-
ble for the car. Contact a Volvo dealer for more
information.

IMPORTANT

When the engine is switched off, the con-
stant battery voltage to the trailer connec-
tor can be switched off automatically so as
not to drain the starter battery.

IMPORTANT

The towball needs regular cleaning and
lubrication with grease in order to prevent
wear.

NOTE

When a hitch with a vibration damper is
used, the towball must not be lubricated.

This also applies when fitting a bicycle rack
that is clamped in around the towball.

NOTE

If the car is equipped with a towbar, there
is no rear mounting for a towing eye.

||

STARTING AND DRIVING

* Option/accessory.

484

Related information

•

Extendable and retractable towbar

*

(p. 485)

•

Driving with a trailer (p. 487)

•

Towbar-mounted bicycle rack

*

(p. 491)

•

Specifications for towbar

*

(p. 484)

Specifications for towbar

*

Dimensions and mounting points for towbar.

Dimensions, mounting points in mm
(inches)

A

1229 (48.4)

B

111.8 (4.4)

C

875 (34.4)

D

437.5 (17.2)

E

See the image above

F

310.5 (12.2)

G

Ball centre

Related information

•

Towbar

*

(p. 483)

•

Towing capacity and towball load
(p. 670)

STARTING AND DRIVING

}}

* Option/accessory.

485

Extendable and retractable

towbar

*

The retractable tow hook is easy to retract or
extend as required. In the retracted position,
the towbar is completely concealed.

WARNING

Follow the instructions for retracting and

extending the towbar carefully.

WARNING

Do not press the extend/retract button if a

trailer or accessory is attached to the tow

bar.

Extending the towbar

WARNING

Avoid standing close to the bumper in the

centre behind the car when extending the

towing hitch.

1.

Open the boot lid. A button for extending/
retracting the towbar is located on the
right-hand side at the rear of the cargo
area. An indicator lamp in the button must
illuminate with a constant orange glow for
the extension function to be active.

2. Press and release the button – extension

might not start if the button is pressed for
too long.

> The towbar extends out and down in an

unlocked position - the indicator lamp
flashes orange. The tow hook is ready
to continue moving to the locked posi-
tion.

||

STARTING AND DRIVING

486

3.

Move the towbar to its end position,
where it is secured and locked in place -
the indicator lamp illuminates with a con-
stant orange glow.
> The towbar is ready for use.

IMPORTANT

When the tow bar is activated by pressing
a key and has been placed in the unlocked
position:

Wait at least 2 seconds before the tow bar
is moved to the locked position. If the tow
bar does not remain in the locked position,
wait another few seconds and try again.

Do not kick the tow bar.

WARNING

Take care to secure the trailer's safety

cable in the intended bracket.

NOTE

Power save mode activates after a while
and the indicator lamp goes out. The sys-
tem is reactivated by closing and reopen-
ing the boot lid. This applies when retract-
ing or extending the towbar.

If the car detects a connected trailer elec-
trically, the indicator lamp stops illuminat-
ing with a constant glow.

Retracting the towbar

IMPORTANT

Make sure that there is no plug or adapter
in the electrical socket when retracting the
towbar.

1. Open the boot lid. Press and release the

button on the right-hand side at the rear of
the cargo area - retraction might not start
if the button is pressed for too long.
> The towbar automatically lowers in an

unlocked position - the indicator lamp
in the button flashes orange.

2.

Lock the towbar by moving it back to its
retracted position, where it is locked.
> The indicator lamp will now illuminate

with a constant glow if the towbar is
correctly retracted.

STARTING AND DRIVING

}}

* Option/accessory.

487

IMPORTANT

When the tow bar is activated by pressing
a key and has been placed in the unlocked
position:

Wait at least 2 seconds before the tow bar
is moved to the locked position. If the tow
bar does not remain in the locked position,
wait another few seconds and try again.

Do not kick the tow bar.

Related information

•

Driving with a trailer (p. 487)

•

Towbar

*

(p. 483)

Driving with a trailer

When driving with a trailer, there are a num-
ber of points that are important to think about
regarding the towbar, the trailer and how the
load is positioned in the trailer.

Payload depends on the car's kerb weight. The
total of the weight of the passengers and all
accessories, e.g. towbar, reduces the car's
payload by a corresponding weight.

The car is supplied with the necessary equip-
ment for towing a trailer.

•

The car's towbar must be of an approved
type.

•

Distribute the load on the trailer so that
the weight on the towbar complies with
the specified maximum towball load. Tow-
ball load is calculated as part of the car's
payload.

•

Increase the tyre pressure to the recom-
mended pressure for a full load.

•

The engine is loaded more heavily than
usual when driving with a trailer.

•

Do not tow a heavy trailer when the car is
brand new. Wait until it has been driven at
least 1000 km (620 miles).

•

The brakes are loaded much more than
usual on long and steep downhill slopes.
Downshift to a lower gear when shifting
manually and adjust your speed.

•

Follow the regulations in force for the per-
mitted speeds and weights.

•

Maintain a low speed when driving with a
trailer up long, steep ascents.

•

The maximum indicated trailer weight only
applies to heights up to 1000 metres
above sea level (3280 ft). At higher eleva-
tions, the engine output and the vehicle's
climbing ability are reduced due to the
reduced air density, and the maximum
trailer load must therefore be reduced. The
weight of the car and trailer must be
decreased by 10% for each additional
1000 m (3280 ft) or part thereof.

•

Avoid driving with a trailer on inclines of
more than 12%.

NOTE

Extreme weather conditions, driving with a
trailer or driving at high altitudes, in combi-
nation with poorer fuel quality than recom-
mended, are factors that considerably
increase the car's fuel consumption.

Trailer connector

An adapter is required if the car's towbar has a
13 pin connector and the trailer has a 7 pin
connector. Use an adapter approved by Volvo.
Make sure the cable does not drag on the
ground.

||

STARTING AND DRIVING

* Option/accessory.

488

IMPORTANT

When the engine is switched off, the con-
stant battery voltage to the trailer connec-
tor can be switched off automatically so as
not to drain the starter battery.

Trailer weights

WARNING

Follow the stated recommendations for

trailer weights. Otherwise, the car and

trailer may be difficult to control in the

event of sudden movement and braking.

NOTE

The stated maximum permitted trailer
weights are those permitted by Volvo.
National vehicle regulations can further
limit trailer weights and speeds. Towbars
can be certified for higher towing weights
than the car can actually tow.

Level control

*

The car's system for level control endeavours
to maintain a constant height regardless of
load (up to the maximum permissible weight).
When the car is stationary the rear of the car
lowers slightly, which is normal.

When driving in hilly terrain and hot
climates

Under certain circumstances, there may be a
risk of overheating when towing a trailer. If the
engine and drive system overheats, a warning
symbol comes on in the driver display and a
message is displayed.

The following applies for cars with automatic
gearbox:

The automatic gearbox adapts the gears
depending on load and engine speed.

Steep inclines

Do not lock the automatic gearbox in a higher
gear than the engine "can cope with" - it is not
always a good idea to drive at a high gear with
low engine speed.

Parking on a hill

1. Depress the brake pedal fully.

2. Activate the parking brake.

3. Select gear position

P

.

4. Release the brake pedal.

Block the wheels with chocks when parking a
car with hitched trailer on a hill.

Starting on a hill

1. Depress the brake pedal fully.

2. Select gear position

D

.

3. Releasing the parking brake.

4. Release the brake pedal and start driving

off.

Related information

•

Trailer stability assist

*

(p. 489)

•

Checking trailer lamps (p. 490)

•

Towing capacity and towball load
(p. 670)

•

Overheating in the engine and drive sys-
tem (p. 480)

•

Adverse driving conditions for engine oil
(p. 676)

•

Extendable and retractable towbar

*

(p. 485)

STARTING AND DRIVING

* Option/accessory.

489

Trailer stability assist

*

The function of trailer stability assist (TSA

31

),

which is included in the stability system
ESC

32

, is to stabilise cars towing trailers in

situations where they begin snaking. The
function is available with towbar installation,
contact a Volvo dealer for more information.

Reasons for snaking

The snaking phenomenon can occur with any
car/trailer combination. Snaking normally
occurs at high speeds. However, there is a risk
of it occurring at lower speeds if the trailer is
overloaded or the load is improperly distrib-
uted, e.g. too far back.

In order for snaking to occur, there must be a
triggering factor, e.g.:

•

Car with trailer subjected to a sudden and
powerful side wind.

•

Car with trailer drives on an uneven road
surface or in a pothole.

•

Sweeping steering wheel movements.

If snaking has started, it could be difficult or
even impossible to suppress. This makes the
car/trailer combination difficult to control and
there is a risk that you could, for example, end
up in the wrong lane or leave the carriageway.

Trailer stability assist function

The trailer stability assist function continually
monitors the car's movements, particularly lat-
eral movements. If snaking is detected, the
front wheels are individually braked. This
serves to stabilise the car/trailer combination.
This is often enough to help the driver regain
control of the car.

If snaking is not eliminated the first time that
trailer stability assist intervenes, the car/trailer
combination is braked with all wheels and
engine power is reduced. Once snaking has
been gradually suppressed and the car/trailer
combination is stable once again, the system
stops regulating and the driver once again has
full control of the car.

NOTE

The stability function is deactivated if the
driver chooses to activate

ESC Sport

Mode

via the menu system in the centre

display.

Trailer stability assist may fail to intervene if
the driver uses severe steering wheel move-
ments to try to rectify the snaking because in
such a situation the system cannot determine
whether it is the trailer or the driver causing
the snaking.

When Trailer Stability Assist
(TSA) is operating, the ESC
symbol flashes in the driver
display.

NOTE

Retrofitting a towbar requires an update of
the car's software, contact a Volvo dealer.

Related information

•

Driving with a trailer (p. 487)

•

Electronic stability control (p. 291)

31

Trailer Stability Assist

32

Electronic Stability Control

STARTING AND DRIVING

* Option/accessory.

490

Checking trailer lamps

When connecting a trailer - check that all the
trailer lamps work before departure.

Direction indicators and brake lights
on the trailer

If one or more of the trailer's direction indica-
tors or brake light bulbs is broken, the driver
display shows a symbol and a message. Other
lights on the trailer must be checked manually
by the driver before setting off.

Symbol Message

•

Trailer turn indicator

Right

turn indicator malfunction

•

Trailer turn indicator

Left

turn indicator malfunction

•

Trailer brake light

Malfunc-

tion

If any lamp for the trailer's direction indicators
is broken, the driver display symbol for direc-
tion indicators will also flash more quickly than
normal.

Rear fog lamp on trailer

When connecting the trailer, the rear fog lamp
may not light up on the car. In such cases, the
rear fog lamp function switches to the trailer.
Upon activation of the rear fog lamp, check

therefore that the trailer is equipped with a
rear fog lamp to travel safely.

Checking trailer lamps

*

Automatic checking

After a trailer is connected electrically, it is
possible to check that the trailer lamps are
working via an automatic lamp activation. The
function helps the driver check that the trailer
lamps are working before starting off.

The car must be switched off to perform the
check.

1. When a trailer is connected to the towbar,

the

Automatic Trailer Lamp Check

mes-

sage is shown in the driver display.

2. Confirm the message by pressing the

right-hand steering wheel keypad's

O

but-

ton.
> The lamp check starts.

3. Exit the car to check lamp functionality.

> All trailer lamps start to flash - then the

lamps are switched on one at a time.

4. Visually check that all lamps available on

the trailer are operational.

5. After a moment, all lamps on the trailer

flash again.
> The check is complete.

Switching off automatic checking

The automatic checking function can be
switched off in the centre display.

1. Press

Settings

in the top view.

2. Press

My Car

Lights and Lighting

.

3. Deselect

Automatic Trailer Lamp

Check

.

Manual checking

If the automatic checking is switched off then
it is possible to start the check manually.

1. Press

Settings

in the top view.

2. Press

My Car

Lights and Lighting

.

3. Select

Manual Trailer Lamp Check

.

> The lamp check starts. Exit the car to

check lamp functionality.

Related information

•

Driving with a trailer (p. 487)

STARTING AND DRIVING

* Option/accessory.

491

Towbar-mounted bicycle rack

*

When using a bicycle rack, the bicycle racks
that Volvo has developed are recommended.

This is in order to avoid damage to the car and
in order to achieve the maximum possible
safety during a journey. Volvo's bicycle racks
are available for purchase at authorised Volvo
dealers.

Carefully follow the instructions enclosed with
the bicycle rack.

•

Bicycle rack including load must weigh a
maximum of 75 kg (165 pounds).

•

The bicycle rack may be designed for a
maximum of three bicycles.

WARNING

Incorrect use of the bicycle rack may cause

damage to the towbar and car.
The bicycle rack can loosen from the tow-

bar if it

•

is incorrectly fitted on the towball

•

is overloaded, see the bicycle rack's
instructions for maximum load weight

•

is used for carrying something other
than bicycles.

The car's driving characteristics are affected
when a bicycle rack is fitted on the towbar.
For example due to:

•

increased weight

•

reduced acceleration capacity

•

reduced ground clearance

•

changed braking capacity.

Recommendations for loading
bicycles on the bicycle rack

The larger the distance between the load's
centre of gravity and the towball, the greater
the load on the towbar.

Load according to the following recommenda-
tions:

•

Fit the heaviest bicycle furthest in, closest
to the car.

•

Keep the load symmetrical and as close to
the centre of the car as possible e.g. by
loading the bicycles facing alternately if
several bicycles are loaded.

•

Remove loose objects from the bicycle for
transportation, e.g. bicycle basket, battery,
child seat. Partly to reduce the load on the
towbar and bicycle rack, and partly to
reduce the wind resistance, which affects
fuel consumption.

•

Do not use protective covers on the bicy-
cles. This may affect manoeuvrability,
impair visibility and increase fuel con-

sumption. It may also lead to an increased
load on the towbar.

Related information

•

Towbar

*

(p. 483)