2019 VOLVO S90 TWIN ENGINE lights

STARTING AND DRIVING
* Option/accessory.439
Hill Start Assist
The function for assisting when starting the vehi-cle on inclines, Hill Start Assist (HSA), helpsprevent the vehicle from rolling backward whenstarting on an uphill gradient. When backing upa hill, HSA helps prevent the vehicle from rollingforward.
The function retains pressure from the brakepedal in the brake system for several secondsafter the brake pedal has been released.
This temporary braking effect is released after afew seconds or when the driver begins driving.
Hill Start Assist is available even if the Auto-holdbrake function is switched off.

Related information
Auto-hold brakes (p. 437)
Brakes (p. 431)
Braking assist after a collision
In a collision in which the activation level isreached for the pyrotechnic seat belt tensionersor airbags, or if a collision with a large animal isdetected, the vehicle's brakes will be automati-cally activated. This function is intended to helpprevent or reduce the effects of any subsequentcollision.
After a serious collision, it may no longer be pos-sible to control and steer the vehicle. In order toavoid or mitigate a possible further collision witha vehicle or an object in the vehicle's path, thebrake assist system is activated automatically tohelp stop the vehicle safely.
The brake lights and hazard warning flashers areactivated during braking. When the vehicle hasstopped, the hazard warning flashers will con-tinue to flash and the parking brake will beapplied.
If braking is not appropriate, e.g. if there is a riskof being hit by passing traffic, the driver can over-ride the system by depressing the acceleratorpedal.
This function assumes that the brake system isintact after a collision.
Brake assist is part of the Rear Collision Warningand Blind Spot Information safety systems.
Related information
Rear Collision Warning (p. 346)
BLIS* (p. 347)
Brake functions (p. 430)

STARTING AND DRIVING
457

Charge
Engine charges hybridbattery.
This function charges thehybrid battery with the help ofthe combustion engine forincreased use of the electricmotor at a later time.

Symbols in the instrument panel
The symbol is displayed in the hybrid battery gaugewhen Hold is activated.
The symbol is displayed in the hybrid battery gaugewhen Charge is activated.

Related information
Using the electric motor only (p. 454)
Economical driving (p. 453)
Hybrid gauge (p. 83)
Preparing for a long trip
It is important to have the vehicle's systems andequipment checked carefully before driving longdistances.
Check that:
the engine is running properly and that fuelconsumption is normal
there are no leaks (fuel, oil or other fluid)
the brake pedal is functioning optimally
all lights are working ‒ adjust the headlightheight if the vehicle is carrying a heavy load
tire tread depth and air pressure are at cor-rect levels. Change to snow tires when driv-ing in areas where there is a risk of snowy oricy roads
the start battery is sufficiently charged
the wiper blades are in good condition

Related information
Checking tire pressure (p. 549)
Filling washer fluid (p. 635)
Winter driving (p. 458)
Economical driving (p. 453)
Vehicle modem settings (p. 527)
Loading recommendations (p. 580)
Pilot Assist (p. 308)
Speed limiter (p. 275)
Tire sealing system (p. 564)

STARTING AND DRIVING
465
Overheating of engine andtransmission
In demanding driving conditions, such as drivingin mountainous areas or hot weather, there is arisk of the engine or transmission overheating,especially when carrying heavy loads.
Engine power may be temporarily limited.
Remove any auxiliary lights mounted in frontof the grille when driving in hot weather.
If the temperature in the engine's coolingsystem becomes too high, a warning symbolwill appear in the instrument panel along withthe message Engine temperature Hightemperature Stop safely. Pull over to asafe location and let the engine idle for a fewminutes to cool down.
If the message Engine temperature Hightemperature Turn off engine or Enginecoolant Level low, turn off engine is dis-played, stop the vehicle and turn off theengine.
If the transmission begins to overheat, analternative gear shifting program will beselected. An integrated protective functionwill also be activated, the warning symbol willilluminate and the message Transmissionwarm Reduce speed to lowertemperature or Transmission hot Stopsafely, wait for cooling will be displayed inthe instrument panel. Follow the recommen-dations given by reducing speed or stopping
the vehicle safely and letting the engine idlefor a few minutes to let the transmissioncool.
If the vehicle begins to overheat, the air con-ditioning may be temporarily switched off.
After a prolonged period of driving indemanding conditions, do not turn off theengine immediately after stopping.

NOTE
It is normal for the engine's cooling fan tooperate for a short time after the engine isswitched off.

Symbols in the instrument panel
Symbol Meaning
High engine temperature. Followthe recommendations provided.
Low coolant level. Follow the rec-ommendations provided.
Transmission hot/overheated/cool-ing. Follow the recommendationsprovided.
Related information
Refilling coolant (p. 599)
Preparing for a long trip (p. 457)

STARTING AND DRIVING
466
Battery drain
The electrical functions in the vehicle drain thebattery to varying degrees. Avoid using ignitionmode II when the engine is switched off. Useignition mode I instead, as this uses less electri-cal current.
Note that certain accessories may also drainpower from the electrical system. Do not usefunctions that use a lot of electrical current whenthe engine is turned off. Examples of such func-tions are:
blower
headlights
windshield wipers
audio system (especially at high volume).
If the starter battery voltage is low, a message isshown in the driver display. The vehicle's energy-saving function will then turn off or reduce certainfunctions, such as the blower and/or the audiosystem.
–Charge the battery by starting the engineand let it run for at least 15 minutes (drivingcharges the battery faster than letting theengine idle).

Related information
Start battery (p. 601)
Ignition modes (p. 429)
Jump starting using another battery
If the start battery is discharged, current fromanother battery can be used to start the vehicle.
Jumper cable connecting points.
CAUTION
The charging point of the vehicle is onlyintended for jump starting the vehicle in ques-tion. The charging point is not intended forjump-starting another vehicle. Using thecharging point to start another vehicle couldcause a fuse to blow, which would cause thecharging point to stop working.
If a fuse has blown, 12 V Battery Fuse failureService required will be displayed in the instru-ment panel. Volvo recommends contacting anauthorized Volvo workshop.
To avoid short circuits or other damage, the fol-lowing steps are recommended when jump star-ting the battery:

STARTING AND DRIVING
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467
1.Put the ignition in mode 0.
2.Make sure the auxiliary battery (the batteryused to jump start the discharged battery)has a voltage of 12 volts.
3.If the auxiliary battery is in another vehicle,turn off that vehicle's engine and make surethat the vehicles are not touching each other.
4. Clamp the red jumper cable onto the auxiliarybattery's positive (+) terminal (1).

CAUTION
Connect the jump cable carefully to preventshort circuits with other components in theengine compartment.
5. Fold back the cover over your vehicle's posi-tive (+) jump start terminal (2).
6. Clamp the other end of the red jumper cableto your vehicle's positive (+) jump start termi-nal (2).
7.Clamp the black jumper cable onto the auxili-ary battery's negative (-) terminal (3).
8. Clamp the other end of the black jumpercable to your vehicle's negative (-) groundpoint (4).
9. Make sure the jumper cables are securelyattached to help prevent sparks while jumpstarting.
10. Start the engine of the assisting vehicle andlet it run for a few minutes at a higher idlingspeed than normal, about 1500 rpm.
11. Start your vehicle's engine. If the enginedoes not start, allow an additional 10minutes of charging time and then try to startthe engine again.
NOTE
When the engine is started under normalconditions, the vehicle's electrical drive motoris prioritized – the gasoline engine remainsoff. This means that the electric motor has"started" and the vehicle is ready to be drivenonce the start knob has been turned clock-wise. Start of the electric motor is indicatedby the indicator lights on the instrument panelgoing out and its preselected theme illuminat-ing.

CAUTION
Do not touch the connections between thecable and the vehicle during the start attempt.Risk of sparking.
12. Remove the jumper cables in the reverseorder ‒ first the black cables and then thered cables.
Make sure that none of the clamps of theblack jumper cables come into contact witheither vehicle's positive (+) jump start termi-nals or either of the red jumper cable's con-nected clamps.
WARNING
PROPOSITION 65 WARNING! Battery posts,terminals, and related accessories containlead and lead compounds, chemicals knownto the state of California to cause cancer andreproductive harm. Wash hands after han-dling.

WARNING
Batteries generate hydrogen gas, whichis flammable and explosive.
Do not connect the jumper cable to anypart of the fuel system or to any movingparts. Avoid touching hot manifolds.
Battery fluid contains sulfuric acid. Do notallow battery fluid to contact eyes, skin,fabrics or painted surfaces.

MAINTENANCE AND SERVICE
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585

Periodic maintenance helps minimize
emissions
NOTE
Refer to your Service and Warranty Book-let for a comprehensive service and main-tenance schedule up to 240,000 km(150,000 miles). This program containsinspections and services necessary forthe proper function of your vehicle andincludes components that affect vehicleemissions.
The Warranty and Service Records Infor-mation booklet also contains detailedinformation concerning the warrantiesthat apply to your vehicle.

On-board Diagnostic System
OBD II is part of your vehicle's computerizedengine management system. It stores diagnosticinformation about your vehicle's emission con-trols. It can light the Check Engine light (MIL) if itdetects an emission control "fault." A "fault" is acomponent or system that is not performingwithin an expected range. A fault may be perma-nent or temporary. OBD II will store a messageabout any fault.
Emission inspection readiness
How do states use OBD II for emission
inspections?
Many states connect a computer directly to avehicle's OBD II system. The inspector can thenread "faults." In some states, this type of inspec-tion has replaced the tailpipe emission test.

How can my vehicle fail OBD II emission
inspection?
Your vehicle can fail OBD II emission inspectionfor any of the following reasons:
If your Check Engine (MIL) light is lit, yourvehicle may fail inspection.
If your vehicle's Check Engine light was lit,but went out without any action on your part,OBD II will still have a recorded fault. Yourvehicle may pass or fail, depending on theinspection practices in your area.
If you had recent service that required dis-connecting the battery, OBD II diagnosticinformation may be incomplete and "notready" for inspection. A vehicle that is notready may fail inspection.

How can I prepare for my next OBD II
emission inspection?
If your Check Engine (MIL) light is lit or waslit but went out without service, have your
vehicle diagnosed and, if necessary, servicedby a qualified Volvo technician.
If you recently had service for a lit CheckEngine light, or if you had service thatrequired disconnecting the battery, a periodof driving is necessary to bring the OBD IIsystem to "ready" for inspection. Two half-hour trips of mixed stop-and-go/highwaydriving are typically needed to allow OBD II toreach readiness. Your Volvo retailer can pro-vide you with more information on planning atrip.
Maintain your vehicle in accordance with yourvehicle's maintenance schedule.
Owner maintenance
Periodic maintenance requirements and intervalsare described in your vehicle's Warranty andService Records Information booklet.
The following points can be carried out betweenthe normally scheduled maintenance services.

Each time the car is refueled:
Check the engine oil level.
Clean the windshield, windshield wipers,headlights, and taillights.

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MAINTENANCE AND SERVICE
* Option/accessory.600
Unscrew the cover in the plastic covering.
Unscrew the expansion tank cap and fillcoolant as needed. The level should notexceed the yellow MAX mark inside theexpansion tank.
Put the components back in place in the reverseorder.

CAUTION
Do not ingest the contents. May causedamage to organs (kidneys).
Use premixed coolant according to Vol-vo's recommendations. If concentratedcoolant is used, make sure that the cool-ant 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 cool-ant when replacing larger components inthe cooling system.
Never run the engine unless the coolingsystem is properly filled. An improperlyfilled cooling system could lead to hightemperatures and cracks in the cylinderheads.
High levels of chlorine, chlorides andother salts may cause corrosion in thecooling system.
Related information
Engine compartment overview (p. 596)
Coolant specifications (p. 647)
Replacing bulbs
Halogen headlights are not available on all mod-els and markets. Contact a Volvo retailer formore information.
LED14 bulbs must be replaced by a workshop.An authorized Volvo workshop is recommended.

NOTE
For information on lights not mentioned inthis article, contact a Volvo dealer or a certi-fied Volvo service technician.

NOTE
Exterior lighting such as headlights and tail-lights may develop temporary condensationon the inside of the lens. This is normal. Allexterior lighting is designed to resist this.Condensation is normally vented out of thelamp housing once the light has been lit forsome period of time.

NOTE
Bulbs for active curve lighting* contain tracesof mercury and should therefore always besubmitted to a certified Volvo service techni-cian.

MAINTENANCE AND SERVICE
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* Option/accessory.613
Fuse pliers are provided on the inside of the fusebox cover to assist in removing and insertingfuses.
There are also spaces for several extra fuses inthe distribution box in the engine compart-ment.

Positions
Fuses 1, 3-21, 23-36, 39-53 and 55-59 are"Micro" fuses.
Fuses 2-22, 37-38 and 54 are "MCase"fuses and should only be replaced by a work-
shop17.
FunctionAmpere
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Movement sensor*5
Instrument panel5
Center console buttons5
Sun sensor5
FunctionAmpere
Sensus control module20
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Steering wheel module5
Module for start knob andparking brake controls5
Heated steering wheel* mod-ule15
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Climate system control mod-ule10
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Data link connector OBD-II 10
Center display5
Climate system blower module(front)40
FunctionAmpere
USB HUB5
Instrument lighting; Interiorlighting; Rearview mirror auto-dim function*; Rain and lightsensors*; Rear tunnel consolekeypad, rear seat*; Power frontseats*; Rear door control pan-els; Climate system blowermodule left/right
7.5
Control module for driver sup-port functions5
Panoramic roof with sun cur-tain*20
Head-up display*5
Passenger compartment light-ing5
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Ceiling console display (seatbelt reminder/front passengerside airbag indicator)
5
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Humidity sensor5
17An authorized Volvo workshop is recommended.