2017 VOLVO XC90 service

MAINTENANCE AND SERVICING
488
Start battery
The vehicle's electrical system is single pole and uses the body and engine block as conductors. The start (main) battery is used to power the starter motor and other electrical componentsand systems. The start battery should only be replaced by a trained and qualified Volvo service technician.
The vehicle has an alternating current generator. The start battery is an Absorbed Glass Mat (AGM) 12-volt battery that is dimensioned foruse in vehicles to support electrical systems andfunctions and regenerative charging. The service life of a battery is affected by factors such as driving conditions/style, the number ofstarts, climate, etc. Extreme cold may also furtherdecrease the battery

MAINTENANCE AND SERVICING
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489
CAUTION
•The infotainment system's energy-saving feature may not function correctly or atall, and/or a message may be displayed ifa battery charger or jumper cables arenot connected properly.
• The negative terminal on the battery must never
be used to connect a jumper cable
or a battery charger. Only the ground point on the chassis may be used.
NOTE
• The service life of the start battery is shortened if it becomes dischargedrepeatedly.
• The service life of the start battery isaffected by factors such as driving condi-tions and climate. Extreme cold may alsofurther decrease the battery's startcapacity.
• Because the battery

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MAINTENANCE AND SERVICING
490
WARNING
In certain models, the battery is held in place by a strap. Ensure that this strap is alwayssecurely fastened and pulled taut.
• When replacing the start battery or support battery an Absorbed Glass Mat (AGM) mustbe used.
• When replacing the start battery, a new bat-tery with the same specifications and dimen-sions must be used. The battery should onlybe replaced by a trained and qualified Volvoservice technician.
Related information
•
Jump starting (p. 374)
• Support battery (p. 490)
• Battery symbols (p. 491)
Support battery Vehicles equipped with Start/Stop are equipped with two 12-volt batteries.
In addition to a heavy-duty start battery, models with Start/Stop also have a support battery thatprovides extra current during the Start/Stopfunction's start sequence.
The support battery is located in a box next to the spring strut in the engine compartment
The following table shows the specifications for the support battery:
Current (V) 12 Cold start capacity (Cold Cranking Amperes -CCA) (A) 170
Dimensions, L×W×H in. (mm)5.9×3.5×5.1
(150×90×130)
Capacity (Ah) 10
• When replacing the start battery or support battery in a vehicle with Start/Stop, anAbsorbed Glass Mat (AGM) must be used.
• The greater the current consumption in thevehicle, the more the generator has to oper-ate and the battery is charged. This increasesfuel consumption.
• When the start battery's charge is below theminimum permitted level, the Start/Stopfunction will be disabled.
When the Start/Stop function is temporarily disa-bled due to high current consumption:
• The engine will auto-start, even if the brakepedal is depressed.
The support battery does not normally requiredmore service than the start battery. If questionsarise, consult a Volvo retailer or trained and quali-fied Volvo service technician.

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MAINTENANCE AND SERVICING
492
Avoid smoking, open flames, and/or sparks.
Risk of explosion
Recycle properly
NOTE
A used battery should be disposed of in an environmentally responsible manner. Consultyour Volvo retailer or take the battery to arecycling station.
Related information
•Start battery (p. 488)
Fuses The fuses help protect the vehicle's electrical components from overloading or short circuits.
WARNING
Never use metal objects or fuses with higher amperage than those stated on the lists offuses. Doing so could seriously damage oroverload the vehicle's electrical system.
If an electrical component fails to function, this may be due to a blown fuse. If the same fuseblows repeatedly, this indicates a problem withthe component, which should be inspected by atrained and qualified Volvo service technician.
Location of the fuseboxes
Engine compartment
Under the glove compartment
Cargo compartment
Related information
• Replacing fuses (p. 493)
• Fuses in the cargo compartment (p. 502)
• Fuses in the engine compartment (p. 494)
• Fuses in the passenger compartment (p. 498)

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MAINTENANCE AND SERVICING
* Option/accessory.
496 •
Fuses 18–30, 35–37, 46–54 and 55–70 are called "Micro".
• Fuses 31–34, 38–45 and 71–78 are called"MCase" and should only be replaced by atrained and qualified Volvo service technician.
Function
A
– –
– –
– –
– –
– –
Front USB socket* 5
12-volt socket in the front tun- nel console 15
12-volt socket on the rear side of the tunnel console15
12-volt socket in the cargo com- partment15
– –
Driver's side headlight, certain LED models15
Passenger's side headlight, cer- tain LED models15
Function
A
– –
Heated windshield*, driver side Shunt
Heated windshield
*, driver side 40
Headlight washers
*25
Windshield washer 25
– –
Horn 20
Alarm siren 5
Brake system control module (valves, parking brake) 40
Windshield wipers 30
Tailgate window washer 25
Heated windshield
*, passenger
side 40
– –
Brake system control module (ABS pump)
40
– –
Function
A
Heated windshield*, passenger
side Shunt
Feed when ignition is switched on to: engine control module,transmission components, elec-trical power steering, centralelectrical module; Brake system control module 5
– –
Passenger side headlight Passenger's side headlight, cer- tain LED models
7.5
15
– –
– –
Battery connection control mod- ule 5
Air bags; Occupant Weight Sen- sor (OWS)5
Driver side headlight Driver's side headlight, certain LED models7.5
15
Accelerator pedal sensor 5

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MAINTENANCE AND SERVICING
* Option/accessory.
500
Positions
• Fuses 1, 3–21, 23–36, 39–53 and 55–59 are called "Micro".
• Fuses 2, 22, 37–38 and 54 are called"MCase" and should only be replaced by atrained and qualified Volvo service technician.
Function
A
– –
120-volt socket on the rear side of the tunnel console* 30
– –
Alarm system movement sensor
A
5
Media player 5
Instrument panel 5
Center console buttons 5
Sun sensor 5
– –
– –
Steering wheel module 5
Module for start knob and parking brake 5
Function
A
Heated steering wheel* module 15
– –
– –
– –
– –
Climate system control module 10
– –
On-board diagnostics (OBDII) 10
Center display 5
Climate system blower module (front) 40
– –
Instrument lighting; Courtesy light- ing; Auto-dim rearview mirror; Rainand light sensor; Rear tunnel con- sole keypad
*; Power front seats *;
Rear door control panels 7.5
Control module for driver support functions
5
Panorama roof and sun shade
*20
Function
A
Head-up display* 5
Courtesy lighting 5
– –
Ceiling console display (seat belt reminder, front passenger side air-bag indicator) 5
– –
Humidity sensor 5
Rear passenger-side door module 20
Fuses in the cargo compartment 10
Internet connection control module; Volvo On Call control module
5
Rear driver-side door module 20
Infotainment control module (amplifier)40
Climate system blower module (rear)
* 40
Multi-band antenna module 5
Front seat massage function 5
– –

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MAINTENANCE AND SERVICING
* Option/accessory.
504
Positions
• Fuses 13–17 and 21–36 are called "Micro".
• Fuses 1–12, 18–20 and 37 are called "MCase" and should only be replaced by atrained and qualified Volvo service technician.
Function
A
Heated rear window 30
– –
Pneumatic suspension* compressor 40
Rear auxiliary electric heater (pas- senger side) 30
– –
Rear auxiliary electric heater (driver side)
* 30
– –
– –
Power tailgate
* 25
Power front seat (passenger side)
*
module 20
Trailer hitch
* control module 40
Seat belt tensioner module (pas- senger side) 40
Function
A
Internal relay windings 5
– –
Foot movement detection module for opening the power tailgate*5
– –
Module for electrically folding third row seats
* 20
Trailer hitch
* control module 25
Power front seat (driver seat
* mod-
ule 20
Seat belt tensioner module (driver side)
40
Parking camera
* 5
– –
– –
– –
– –
Airbag and seat belt tensioner modules 5
– –
Function
A
Heated rear seat (driver side)*15
– –
Blind Spot Information (BLIS)
*5
– –
Seat belt tensioner modules 5
Emission system actuator 5
– –
All Wheel Drive control module
*15
Heated rear seat (passenger side)
*15
– –
Related information
•Replacing fuses (p. 493)
• Fuses (p. 492)
• Fuses in the passenger compartment (p. 498)
• Fuses in the engine compartment (p. 494)

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MAINTENANCE AND SERVICING
506
NOTE
•For information regarding any bulbs not mentioned in this section, please contactyour Volvo retailer or a trained andauthorized Volvo service technician.
• Always switch off the ignition before star-ting to replace a bulb.
• If an error message remains in the dis-play after a faulty bulb has been replaced,contact an authorized Volvo workshop.
• Condensation may form temporarily onthe inside of the lenses of exterior lightssuch as headlights, fog lights, or taillights.This is normal and the lights aredesigned to withstand moisture. Normally,condensation will dissipate after thelights have been on for a short time.
• The optional Active Bending Light bulbscontain trace amounts of mercury. Thesebulbs should always be disposed of by atrained and qualified Volvo service techni-cian.
CAUTION
Never touch the glass of bulbs with your fin- gers. Grease and oils from your fingers vapor-ize in the heat and will leave a deposit on thereflector, which will damage it.
WARNING
• The ignition should be switched off com- pletely (be in ignition mode
0) when
replacing bulbs.
• If the engine has been running just prior to replacing bulbs in the headlight hous-ing, please keep in mind that componentsin the engine compartment will be hot.
Front bulbs (vehicles with halogen headlights)
Low beam
High beam
Parking light/Daytime Running Light
Turn signal
Fog light with corner illumination (LED)