2020 VOLVO XC90 TWIN ENGINE engine

MAINTENANCE AND SERVICE
617
Hybrid battery The vehicle's electric motor is powered by a rechargeable, maintenance-free, lithium-ionhybrid battery.
NOTE
The vehicle cannot be started if the hybrid battery is discharged.
NOTE
If both the starter battery and the hybrid battery are discharged, both batteries
must be charged. In such cases, it is notpossible to charge only the hybrid batteryfirst. The starter battery must have a certain level of charge for it to be possible tocharge the hybrid battery.
WARNING
Hybrid battery replacement may only be performed by a workshop – an authorizedVolvo workshop is recommended.
CoolantThe hybrid battery's cooling system has its own expansion tank.
CAUTION
Filling the hybrid battery coolant should only be performed by a workshop – anauthorized Volvo workshop is recom-mended.
Specifications for hybrid batteryType: Lithium-ion
Power reserve: 11.6 kWh.
NOTE
The capacity of the hybrid battery decrea- ses with age and use, which could result inincreased use of the combustion engine,leading to higher fuel consumption andreduced electric motor range.
Related information
Battery symbols (p. 618)
Start battery (p. 613)
Charging the hybrid battery (p. 395)
Battery recycling (p. 618)

MAINTENANCE AND SERVICE
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619
Fuses and fuseboxes All electrical functions and components are protected by a number of fuses in order toprotect the vehicle's electrical system fromdamage by short circuiting or overloading.
WARNING
Never use a foreign object or a fuse with a higher amperage than that specified toreplace a fuse. This could cause significantdamage 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 described in the vehicle's Owner's Manual.
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 recommendscontacting an authorized Volvo workshop tohave the component checked.
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. 619)
Fuses in the cargo compartment (p. 634)
Fuses in the engine compartment (p. 621)
Fuses under the glove compartment(p. 628)
Replacing fuses
All electrical functions and components are protected by a number of fuses in order toprotect the vehicle's electrical system fromdamage 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 toreplace a fuse. This could cause significantdamage to the electrical system and possi-bly lead to a fire.
WARNING
Contact an authorized Volvo workshop for assistance replacing fuses not listed in theOwner's Manual. If fuse replacement isperformed incorrectly, significant damagecan be caused to the electrical system.

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MAINTENANCE AND SERVICE
620
Related information
Fuses and fuseboxes (p. 619)
Fuses in the cargo compartment (p. 634)
Fuses in the engine compartment (p. 621)
Fuses under the glove compartment(p. 628)

MAINTENANCE AND SERVICE
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621
Fuses in the engine compartment The fuses in the engine compartment help protect electrical components such as engineand brake functions.

MAINTENANCE AND SERVICE
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625
FunctionAmpere Type
Fed when ignition is on: Engine control module; transmission components, electrical power steering, central electrical module 5 Micro
Exterior vehicle sound (certain markets)
5 Micro
Passenger-side headlight, LED15 Micro
– – Micro
–– Micro
–– Micro
Airbags; Passenger weight sensor 5 Micro
Driver-side headlight, LED15 Micro
Accelerator pedal sensor 5 Micro
Transmission control module; gear selector control module15 Micro
Engine control module 5 Micro
–– Micro
–– Micro
–– Micro
–– Micro
Engine control module; actuator; throttle unit; turbo-charger valve20 Micro

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MAINTENANCE AND SERVICE
626
FunctionAmpere Type
Solenoids; Valve; Overpressure coupling 10 Micro
Vacuum regulator; Electric bypass valve: Ventilation valve7.5 Micro
Spoiler damper control module; Cooler damper control module 5 Micro
–– Micro
Heated oxygen sensor front and rear15 Micro
Oil pump solenoid; A/C magnetic coupling; Heated oxygen sensor front, center and rear15 Micro
– – Micro
Engine control module20 Micro
Ignition coils; spark plugs 15 Micro
– – MCase
–– MCase
Transmission oil pump control module30 MCase
– – MCase
Transmission actuator25 MCase
– – MCase

MAINTENANCE AND SERVICE
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629
Fuse pliers are provided on the inside of the fuse box cover to assist in removing andinserting fuses.There are also spaces for several extra fuses inthe
distribution box in the engine compart-
ment .PositionsThere is a decal with a diagram of the loca-tions of the fuses on the inside of the cover.

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MAINTENANCE AND SERVICE
* Option/accessory.
632
Function Ampere Type
Fuses in the trunk/cargo compartment 10 Micro
Control module for Internet-connected vehicle; Control module for Volvo On Call 5 Micro
–20
– Micro
Infotainment control module (amplifier)
40
MCaseA
Climate system blower module (rear)
* 40
MCaseA
Multi-band antenna module
5 Micro
Front seat massage function* 5 Micro
–
– Micro
Rear window wiper15 Micro
Fuel pump control module15 Micro
Relay coils in distribution box in engine compartment; Relay coil for transmission oil pump; Medium-voltage converter; Integrated start generator 5 Micro
Opening trunk/tailgate with foot movement
* 5 Micro
Driver's seat heating
15 Micro
Front passenger's seat heating15 Micro
Coolant pump7.5 Micro
– – Micro