Volvo XC90 Recharge Plug-in Hybrid (2021 year). Manual in english — page 37

MAINTENANCE AND SERVICE

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627

Coolant

The coolant helps ensure that excess heat is
distributed in the circuit in order to, for exam-
ple, warm up the start battery or provide
heating to the passenger compartment.

To avoid deterioration of the cooling system,
engine trouble, etc., only approved Volvo cool-
ant should be used.

Recommended grade:

Volvo-approved pre-

mixed coolant. If concentrated coolant is used,
mix with 50% water of acceptable quality (i.e.
not salt water, etc.). Consult a Volvo retailer if
you have any questions.

To avoid deterioration of the cooling system,
engine trouble, etc., only approved Volvo cool-
ant should be used.

WARNING

Coolant is hazardous if ingested and could

cause damage to organs (kidneys). The

product contains ethylene glycol, inhibitor,

water, etc.

Related information

•

Refilling coolant (p. 627)

Refilling coolant

When refilling coolant, follow the instructions
on the package. Never fill the cooling system
with only water. The risk of freezing is
increased with too low or too high amounts
of coolant.

If there is coolant under the vehicle, smoke
from the cooling system, or if more than
2 liters (about 2 quarts) of coolant has been
added to the system, there could be some-
thing wrong with the cooling system and star-
ting the vehicle could damage the engine. Call
a tow truck and do not attempt to start the
engine.

WARNING

The coolant may be very hot. Never

unscrew the cap when the coolant is hot. If

coolant must be filled, unscrew the expan-

sion tank cap slowly to relieve overpres-

sure.

Coolant expansion tank

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628

Lift the rubber strip by pressing it inward
into the engine compartment.

Remove the plastic cover by folding out
the catch and lifting the cover upward.

Unscrew the expansion tank cap and fill
coolant as needed. The level should be
between the

MIN

and

MAX

marks on the

expansion tank.

CAUTION

•

Do not ingest the contents. May cause
damage to organs (kidneys).

•

Use premixed coolant according to
Volvo's recommendations. If concen-
trated coolant is used, make sure that
the coolant mixture is 50% coolant
and 50% water of acceptable quality.

•

Do not mix different types of coolant.

•

To help ensure sufficient corrosion pro-
tection in the system, only use new
coolant when replacing larger compo-
nents in the cooling system.

•

Never run the engine unless the cool-
ing system is properly filled. An
improperly filled cooling system could
lead to high temperatures and cracks
in the cylinder heads.

•

High levels of chlorine, chlorides and
other salts may cause corrosion in the
cooling system.

Related information

•

Engine compartment overview (p. 623)

•

Coolant (p. 627)

MAINTENANCE AND SERVICE

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629

Starter battery

The starter battery is used to start the electri-
cal system and power electrical equipment in
the vehicle. The hybrid battery is used to start
the combustion engine.

The vehicle has a single-pole electrical system
that uses the chassis and engine mount as
conductors.

The starter battery is a 12 V AGM (Absorbed
Glass Mat) battery, dimensioned for regenera-
tive charging and to support the function of
the vehicle's various systems.

The service life and performance of the starter
battery are affected by factors such as driving
style, driving conditions, climate, battery dis-
charges, number of starts, etc.

•

Never disconnect the starter battery while
the engine is running.

•

Make sure the cables to the starter battery
are correctly connected and the clamps
are securely tightened.

WARNING

•

Batteries generate hydrogen gas,
which is flammable and explosive.

•

Do not connect the jumper cable to
any part of the fuel system or to any
moving parts. Avoid touching hot
manifolds.

•

Battery fluid contains sulfuric acid. Do
not allow battery fluid to contact eyes,
skin, fabrics or painted surfaces.

•

If contact occurs, flush the affected
area immediately with water. Obtain
medical help immediately if eyes are
affected.

•

Never expose the battery to open flame
or electric spark. Do not smoke near
the battery. Failure to follow the
instructions for jump starting can lead
to injury.

Starter battery service life and
capacity

The service life of the starter battery is affec-
ted by several factors, such as number of
starts, battery discharges, driving style, driving
conditions, climate, etc. The starting capacity
of the battery reduces gradually over time. The
battery must therefore be recharged if the
vehicle is not used for a long period of time or
if it is only driven short distances. Severe cold

further limits starting capacity. If the starter
battery becomes discharged too many times,
its service life will be shortened.

To help keep the starter battery in good condi-
tion, the vehicle should be driven at least
15 minutes per week or the battery should be
connected to a battery charger with automatic
trickle charging. A starter battery that is
always kept fully charged has the maximum
service life.

Location

The starter battery is located in the cargo compart-

ment.

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MAINTENANCE AND SERVICE

630

WARNING

If the starter battery is disconnected, the

function for automatic opening and closing

must be reset to function correctly. A reset

is required in order for the pinch protection

to work.

CAUTION

On certain models, the battery is secured
with a tensioning strap. Make sure that the
tensioning strap is always securely tight-
ened.

Specifications for starter battery

Battery type

H8 AGM

Voltage (V)

12

Cold start capacity

A

- CCA

B

(A)

850

Dimensions, L×W×H

353×175×190 mm (13.9×6.9×7.5 inches)

Capacity (Ah)

95

A

According to EN standard.

B

Cold Cranking Amperes.

Volvo recommends that batteries are replaced
by an authorized Volvo workshop.

CAUTION

If replacing the battery, make sure you
replace it with a battery of the same size,
cold start capacity and type as the original
battery (see the decal on the battery).

Related information

•

Battery symbols (p. 631)

•

Hybrid battery (p. 631)

•

Jump starting using another battery
(p. 472)

•

Reset procedure for pinch protection
(p. 171)

•

Battery recycling (p. 632)

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631

Hybrid battery

The vehicle's electric motor is powered by a
rechargeable, maintenance-free, lithium-ion
hybrid battery.

NOTE

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

If both the starter battery and the hybrid bat-
tery are discharged, both batteries must be
charged. In this situation, it is not possible to
first charge only the hybrid battery. The starter
battery must have a certain charge level in
order for the hybrid battery to be charged.

WARNING

Hybrid battery replacement may only be

performed by a workshop – an authorized

Volvo workshop is recommended.

Hybrid battery service life and
capacity

The capacity of the hybrid battery decreases
with age and use, which could result in
increased use of the combustion engine and
thereby higher fuel consumption and reduced
electric motor range.

Coolant

The hybrid battery's cooling system has its
own expansion tank.

CAUTION

Filling the hybrid battery coolant should
only be performed by a workshop – an
authorized Volvo workshop is recom-
mended.

Specifications for hybrid battery

Type:

Lithium-ion

Power reserve:

11.6 kWh.

Related information

•

Battery symbols (p. 631)

•

Starter battery (p. 629)

•

Charging the hybrid battery (p. 403)

•

Battery recycling (p. 632)

Battery symbols

There are warning symbols and information
on the batteries.

Wear protective goggles.

for additional information.

Keep batteries away from

children.

Batteries contain corro-

sive acid.

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632

Avoid smoking, open

flames, and/or sparks.

Risk of explosion.

Recycle properly.

Related information

•

Starter battery (p. 629)

•

Hybrid battery (p. 631)

•

Battery recycling (p. 632)

Battery recycling

Start batteries must be recycled in an envi-
ronmentally sound manner at the end of their
service life.

Consult a workshop if you are uncertain of
how to dispose of this type of waste

‒

an

authorized Volvo workshop is recommended.

Related information

•

Starter battery (p. 629)

•

Hybrid battery (p. 631)

•

Battery symbols (p. 631)

Fuses and fuseboxes

All electrical functions and components are
protected by a number of fuses in order to
protect the vehicle's electrical system from
damage by short circuiting or overloading.

WARNING

Never use a foreign object or a fuse with a

higher amperage than that specified to

replace a fuse. This could cause significant

damage to the electrical system and possi-

bly lead to a fire.

WARNING

Orange wiring may only be handled by

qualified personnel.

WARNING

A number of electrical components in Twin

Engine Plug-in Hybrid vehicles use high-

voltage current and can be extremely dan-

gerous if handled incorrectly.
Do not touch anything that is not clearly

If any electrical component or function is not
responding, the component may have blown a
fuse due to temporary overload. If the same
fuse blows repeatedly, there may be a prob-
lem with the component. Volvo recommends
contacting an authorized Volvo workshop to
have the component checked.

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633

Location of fuseboxes

The illustration is generic - appearance may vary

according to vehicle model.

Engine compartment

Under the glove compartment

Trunk/cargo compartment

Related information

•

Replacing fuses (p. 633)

•

Fuses in the cargo compartment (p. 647)

•

Fuses in the engine compartment
(p. 634)

•

Fuses under the glove compartment
(p. 641)

Replacing fuses

All electrical functions and components are
protected by a number of fuses in order to
protect the vehicle's electrical system from
damage by short circuiting or overloading.

1. Refer to the fuse diagram to locate the

fuse.

2. Pull out the fuse and examine it from the

side to determine if the curved metal wire
in the fuse is intact.

3. If the wire is broken, replace the fuse with

a new fuse of the same color and amper-
age.

WARNING

Never use a foreign object or a fuse with a

higher amperage than that specified to

replace a fuse. This could cause significant

damage to the electrical system and possi-

bly lead to a fire.

WARNING

Contact an authorized Volvo workshop for

assistance replacing fuses not listed in the

performed incorrectly, significant damage

can be caused to the electrical system.

Related information

•

Fuses and fuseboxes (p. 632)

•

Fuses in the cargo compartment (p. 647)

•

Fuses in the engine compartment
(p. 634)

•

Fuses under the glove compartment
(p. 641)

MAINTENANCE AND SERVICE

634

Fuses in the engine compartment

The fuses in the engine compartment help
protect electrical components such as engine
and brake functions.

MAINTENANCE AND SERVICE

}}

635

Fuse pliers are provided on the inside of the
fuse box cover to assist in removing and
inserting fuses.

There are also spaces for several extra fuses in
the fusebox.

Positions

There is a decal with a diagram of the loca-
tions of the fuses on the inside of the cover.

Function

Ampere

Type

–

–

Micro

–

–

Micro

–

–

Micro

Control module for actuator for engaging/changing gears, automatic transmission

5

Micro

High-voltage coolant heater control module

5

Micro

Control module for A/C; heat exchanger cut-off valve; cut-off valve for coolant through the climate system

5

Micro

Hybrid battery control module; high-voltage converter for combined high-voltage generator/starter motor with 500 V–
12 V voltage converter

5

Micro

–

–

Micro

Converter for controlling feed to rear axle electric motor

10

Micro

Hybrid battery control module; high-voltage converter for combined high-voltage generator/starter motor with 500 V–
12 V voltage converter

10

Micro

Charge module

5

Micro

Cut-off valve for hybrid battery coolant; coolant pump 1 for hybrid battery

15

Micro

Coolant pump for electric drive system

15

Micro

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MAINTENANCE AND SERVICE

* Option/accessory.

636

Function

Ampere

Type

Hybrid component cooling fan

25

MCase

A

–

–

MCase

A

–

–

MCase

A

–

–

MCase

A

Calculation module

5

Micro

–

–

Micro

–

–

Micro

–

–

Micro

–

–

Micro

Front USB port in tunnel console, front

*

7.5

Micro

12 V outlet in tunnel console, front

15

Micro

–

–

Micro

12 V outlet in trunk/cargo compartment

*

15

Micro

–

–

Micro

Driver-side headlight, LED

B

15

Micro

Passenger-side headlight, LED

B

15

Micro

–

–

Micro

MAINTENANCE AND SERVICE

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* Option/accessory.

637

Function

Ampere

Type

–

–

MCase

A

–

–

MCase

A

Headlight washers

*

25

MCase

A

Windshield washer

25

MCase

A

–

–

Micro

Horn

20

Micro

Alarm siren

*

5

Micro

Brake system control module (valves, parking brake)

30

MCase

A

Wipers

30

MCase

A

Rear window washer

25

MCase

A

–

–

MCase

A

Parking heater

*

20

MCase

A

–

–

MCase

A

–

–

MCase

A

–

–

MCase

A

Fed when ignition is on: Engine control module; transmission components, electrical power steering, central electrical
module

5

Micro

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MAINTENANCE AND SERVICE

638

Function

Ampere

Type

Exterior vehicle sound (certain markets)

5

Micro

Passenger-side headlight, LED

B

15

Micro

–

–

Micro

–

–

Micro

–

–

Micro

Airbags; Passenger weight sensor

5

Micro

Driver-side headlight, LED

B

15

Micro

Accelerator pedal sensor

5

Micro

Transmission control module; gear selector control module

15

Micro

Engine control module

5

Micro

–

–

Micro

–

–

Micro

–

–

Micro

–

–

Micro

Engine control module; actuator; throttle unit; turbo-charger valve

20

Micro

Solenoids, Fuel leakage control valve; Overpressure coupling

10

Micro

Vacuum regulator; Electric bypass valve: Ventilation valve

7.5

Micro

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639

Function

Ampere

Type

Spoiler damper control module; Cooler damper control module

Fuel leakage control pump

5

Micro

–

–

Micro

Heated oxygen sensor front and rear

15

Micro

Oil pump solenoid; A/C magnetic coupling; Heated oxygen sensor front, center and rear

15

Micro

–

–

Micro

Engine control module

20

Micro

Ignition coils; spark plugs

15

Micro

–

–

MCase

A

–

–

MCase

A

Transmission oil pump control module

30

MCase

A

–

–

MCase

A

–

–

MCase

A

–

–

MCase

A

–

–

MCase

A

–

–

MCase

A

A

This type of fuse should be replaced by a workshop. An authorized Volvo workshop is recommended.

B

LED (Light Emitting Diode)

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Related information

•

Fuses and fuseboxes (p. 632)

•

Replacing fuses (p. 633)

MAINTENANCE AND SERVICE

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641

Fuses under the glove

compartment

Fuses under the glove compartment provide
protection for e.g. electrical outlets, displays
and door modules.

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MAINTENANCE AND SERVICE

642

Fuse pliers are provided on the inside of the
fuse box cover to assist in removing and
inserting fuses.

There are also spaces for several extra fuses in
the

distribution box in the engine compart-

ment

.

Positions

There is a decal with a diagram of the loca-
tions of the fuses on the inside of the cover.