2020 VOLVO S90 brake

MAINTENANCE AND SERVICE
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553
Hood completely closed.
WARNING
Never drive with the hood open! If this symbol appears, or anything else indicatesthat the hood is not com-pletely closed while driv-ing, stop immediately and
close it properly.
Related information
Engine compartment overview (p. 553)
Door and seat belt reminders (p. 51)
Engine compartment overview
This overview shows some service-related components.
The layout of the engine compartment may vary depending on model and engine variant.
Coolant expansion tank
Brake fluid reservoir (located on the driv- er's side)
Washer fluid filler pipe 12
Fusebox
Air filter
Engine oil filler pipe
WARNING
Bear in mind that the cooling fan (located at the front of the engine compartmentbehind the radiator) may start or continuerunning automatically up to about6 minutes after the engine is turned off. Always entrust engine washing to a work- shop – an authorized Volvo workshop isrecommended. If the engine is hot, there isa risk of fire.
WARNING
The ignition system works with extremely high and dangerous voltages. The vehicleelectrical system should always be in igni-tion mode
0 when work in being per-
formed in the engine compartment. Do not touch any spark plugs or ignition coils when the vehicle electrical system isin ignition mode II or when the engine is
warm.
Related information
Opening and closing the hood (p. 552)
Filling washer fluid (p. 607)
Refilling coolant (p. 556)
Fuses in the engine compartment (p. 575)
12
Fill the washer fluid at regular intervals, e.g. when refueling.

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MAINTENANCE AND SERVICE
560
Rear bulbs
Fog light
Parking light (LED)
Turn signal19
Parking light (LED)
Brake light (LED)
Parking light (LED)
Backup light 19
Brake light
‒ central, high-mounted (LED)
Related information
Replacing bulbs (p. 558)
Bulb specifications (p. 566)
Lighting control and panel (p. 148)
Replacing the low beam headlight bulbs The low beam bulbs in the halogen head- lights can be changed without the help of aworkshop.
Before the bulbs can be replaced, the plastic covering over the headlight must be removed.
CAUTION
Never touch the bulb glass with your bare fingers. Grease and oils from your fingersvaporize in the heat and will leave adeposit on the reflector, which may dam-age it.
19
Contact a workshop for replacement ‒ an authorized Volvo workshop is recommended.

MAINTENANCE AND SERVICE
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571
Support battery Vehicles with the Start/Stop function are equipped with two batteries – a more power-ful 12 V start battery and a support batterythat provides stronger current during thefunction's start sequence.
The 12 V support battery is located in a box next to the spring strut in the engine compartment.
NOTE
The higher the current consumption in the vehicle, the more the alternator hasto work and the batteries have to becharged = increased fuel consumption.
When the starter battery capacity hasdropped below the lowest permissiblelevel, the Start/Stop function is disen-gaged.
When the Start/Stop function is temporarily reduced due to high current consumption: The engine will auto-start, even if the driver does not lift their foot from thebrake pedal.
The support battery does not normally requiremore service than the start battery. If you haveany questions or concerns, consult a work-shop ‒ an authorized Volvo workshop is rec-
ommended.
CAUTION
If the following is not observed, the Start/ Stop function may temporarily stop work-ing after connection of an external starterbattery or battery charger:
The negative battery terminal of thevehicle's starter battery must
never be
used to connect an external starterbattery or battery charger – only thevehicle's negative charging pointshould be used as a grounding point.
NOTE
If the starter battery has been discharged to the extent that the vehicle does not havenormal electrical functions and the enginemust then be jump-started with an externalbattery or a battery charger, the Start/Stopfunction may remain activated. If the Start/Stop function shortly thereafter auto-stopsthe engine, there is a huge risk that auto-start of the engine will fail due to insuffi-cient battery capacity since the battery hadnot had time to recharge. If the vehicle has been jump-started or if there has not been enough time for thebattery to be charged with a batterycharger, the Start/Stop function should betemporarily deactivated until the batteryhas been recharged by the vehicle. At anambient temperature of about +15°C(about 60°F), the battery must be chargedby the vehicle for at least one hour. Atlower ambient temperatures, the chargingtime can increase to 3-4 hours. It is advisa-ble to charge the battery with an externalbattery charger.
Specifications for support battery
Type AGM
Voltage (V) 12

MAINTENANCE AND SERVICE
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575
Fuses in the engine compartment The fuses in the engine compartment help protect electrical components such as engineand brake functions.

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MAINTENANCE AND SERVICE
* Option/accessory.
578
Function Ampere Type
Passenger-side headlight, LEDB
15 Micro
– – Micro
––
MCaseA
–
–
MCaseA
Headlight washers
* 25
MCaseA
Washer fluid pump
25
MCaseA
Transmission control module; Electric gear selector
15 Micro
Horn20 Micro
Alarm siren* 5 Micro
Brake system control module (valves, parking brake)
40
MCaseA
Brake control with 48 V battery 30
MCaseA
Wipers
30
MCaseA
–
–
MCaseA
–
–
MCaseA
–
–
MCaseA
Brake system control module (ABS pump)
40
MCaseA
–
–
MCaseA

MAINTENANCE AND SERVICE
579
FunctionAmpere Type
– –
MCaseA
Fed when ignition is on: engine control module, transmission components, electrical power steering, central electrical module, brake system control module 5 Micro
–
– Micro
Passenger-side headlight, LEDB
15 Micro
– – Micro
–– Micro
Battery connection control module 5 Micro
Airbags; Passenger weight sensor5 Micro
Driver-side headlight, LEDB
15 Micro
Accelerator pedal sensor 5 Micro
A
This type of fuse should be replaced by a workshop. An authorized Volvo workshop is recommended.
B LED (Light Emitting Diode)
Related information
Fuses and fuseboxes (p. 573)
Replacing fuses (p. 574)

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MAINTENANCE AND SERVICE
* Option/accessory.
582
Function Ampere Type
Medium voltage module 10 Micro
Electrical outlet in tunnel console between rear seats* 30
MCaseA
–
– Micro
Movement sensor* 5 Micro
–
– Micro
Instrument panel 5 Micro
Center console buttons5 Micro
Sun sensor5 Micro
–– Micro
–– Micro
Steering wheel module 5 Micro
Module for start knob and parking brake controls5 Micro
Heated steering wheel* module 15 Micro
–
– Micro
–– Micro
–– Micro
–– Micro

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MAINTENANCE AND SERVICE
* Option/accessory.
594
WARNING
Never use more than one inlay mat at a time on the driver's floor. If any othertype of floor mat is used, remove theoriginal mat from the driver's seat floorbefore driving. All types of mats mustbe securely anchored in the attach-ment points in the floor. Make sure thefloor mat does not impede the move-ment of the brake pedal or acceleratorpedal in any way, as this could be aserious safety hazard.
Volvo's floor mats are specially manu-factured for your vehicle. They must beproperly secured in the attachmentpoints in the floor to help ensure theycannot slide and become trappedunder the pedals.
Related information
Cleaning the interior (p. 591)
Cleaning the center display (p. 591)
Cleaning fabric upholstery and ceiling liner(p. 593)
Cleaning the seat belt (p. 593)
Cleaning leather upholstery
* (p. 594)
Cleaning the leather steering wheel(p. 595)
Cleaning interior plastic, metal and woodsurfaces (p. 595)
Cleaning leather upholstery
*
Only use cleaning agents and car care prod- ucts recommended by Volvo. Clean regularlyand treat stains immediately. It is importantto vacuum before using a cleaning agent.
Volvo's leather upholstery * is treated to pro-
tect its original appearance. Over time, sun- light, grease, dirt, etc. could break down theprotective layer. This could result in scratchesand cracking. Leather upholstery * is a natural product that
changes and acquires a beautiful patina over time. Regular cleaning and treatments arerequired to preserve the qualities and color ofthe leather. Volvo offers a comprehensiveproduct, Volvo Leather Care KitWipes, forcleaning and treating leather upholstery.When used as directed, it helps preserve theleather's protective coating. For optimal results, Volvo recommends clean- ing and applying protective cream one to fourtimes a year (or more often as needed). VolvoLeather Care Kit 951 0251 and Volvo LeatherSoftener 943 7429 are available for purchaseat Volvo retailers.
Cleaning the leather upholstery1. Apply the leather cleaner to a damp sponge and squeeze it until the cleanerfoams. 2. Move the sponge in circular motions to
apply the foam to the stain.
3. Dampen the stain thoroughly with the sponge. Let the sponge absorb the stainand do not rub.
4. Dry the stain using a soft towel and let the leather dry completely.
Protecting the leather upholstery1. Apply a small amount of leather protectorto a cloth and then apply the protector tothe leather using light circular movements.
2. Let it dry for approximately 20 minutes. > Protecting the leather upholsterymakes it better able to withstand sun-light's harmful UV rays.
Related information
Cleaning the interior (p. 591)
Cleaning the center display (p. 591)
Cleaning fabric upholstery and ceiling liner(p. 593)
Cleaning the seat belt (p. 593)
Cleaning floor mats and inlay mats(p. 593)
Cleaning the leather steering wheel(p. 595)
Cleaning interior plastic, metal and wood surfaces (p. 595)