2018 VOLVO XC90 warning light

STARTING AND DRIVING
431
•
High levels of condensation on the inside of the windows.
• the climate system settings and the actualclimate in the passenger compartment differ.
• Electrical current consumption is temporarilyhigh or the start battery's charge is below theminimum level.
• The brake pedal is pumped repeatedly.
• The hood is open.
• The vehicle begins to roll or increases speedslightly if the engine auto-stopped before thevehicle was at a standstill.
• The driver's seat belt is unbuckled with the gear selector in the
D or N positions.
• The gear selector is moved from
D to R or M
( ± ).
• The driver's door is opened with the gearselector in
D. An audible signal and a text
message informs the driver that the ignition is on.
WARNING
Do not open the hood if the engine has auto- stopped. Turn off the engine by switching offthe ignition before lifting the hood.
Related information
• Start/Stop function (p. 428)
• Driving with the Start/Stop function (p. 428) •
Temporarily deactivating the Start/Stop func- tion (p. 430)

STARTING AND DRIVING
* Option/accessory.437
Hill Descent Control *
The function for assisting when driving downhill, Hill Descent Control (HDC), is a low-speedfunction with increased engine braking. Thefunction makes it possible to increase ordecrease the vehicle's speed on steep downhillgradients by only using the accelerator pedal,without applying the brakes. In vehicles equipped with drive mode control *,
the function is included in the Off Road drive mode.
HDC is designed for driving on rough roads at low speeds and downhill gradients with slipperyor otherwise difficult road surfaces. The driverdoes not need to use the brake pedal but caninstead focus on steering.
WARNING
HDC is only intended to be a supplementary braking aid and it does not function in all sit-uations. The driver is always ultimately responsible for operating the vehicle in a safe manner.
FunctionHill Descent Control allows the vehicle to move forward or backward at very low speeds assistedby the brake system. The driver can increase thespeed by pressing the accelerator pedal. Whenthe accelerator pedal is released, the vehicle will return to very low speed regardless of how steepthe hill is and without the brakes needing to beapplied. The brake lights will illuminate when thefunction is activated. The driver can brake to stop or slow the vehicle at any time by depressing the brake pedal. HDC is activated along with Low Speed Control (LSC), which facilitates and improves traction andcontrol on rough and slippery surfaces. The sys-tem is intended to be used at low speeds, up toapproximately 40 km/h (25 mph).
To keep in mind when using HDC
•
If the function is switched off while driving ona steep downhill gradient, braking effect willbe gradually reduced.
• HDC can be used in gear positions
D and R,
and in manual gears 1 or 2.
• It is not possible to manually shift to thirdgear or higher when HDC is active.
NOTE
When LSC with HDC is activated, the feel of the accelerator pedal and engine responsewill change.
NOTE
This drive mode is not designed to be used for normal street driving.
NOTE
The function is deactivated when driving at high speeds and must be reactivated at lowerspeeds if so desired.
Related information
• Activating and deactivating Hill Descent Con- trol
* using the function button (p. 438)
• Changing drive mode
* (p. 425)
• Low Speed Control
* (p. 435)
• All Wheel Drive (AWD)
* (p. 423)

STARTING AND DRIVING
* Option/accessory.
446
Overheating of engine andtransmission
In demanding driving conditions, such as driving in 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 front of 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 with the message
Engine temperature High
temperature Stop safely. Pull over to a
safe location and let the engine idle for a few minutes to cool down.
• If the message
Engine temperature High
temperature Turn off engine or Engine
coolant Level low, turn off engine is dis-
played, stop the vehicle and turn off the engine.
• If the transmission begins to overheat, analternative gear shifting program will beselected. An integrated protective functionwill also be activated, the warning symbol will illuminate and the message
Transmission
warm Reduce speed to lower
temperature or Transmission hot Stop
safely, wait for cooling will be displayed in
the instrument panel. Follow the recommen- dations given by reducing speed or stopping the vehicle safely and letting the engine idle for 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 to operate for a short time after the engine isswitched off.
Symbols in the instrument panel
SymbolMeaning
High engine temperature. Follow the recommendations provided.
Low coolant level. Follow the rec- ommendations provided.
Transmission hot/overheated/cool- ing. Follow the recommendationsprovided.
Related information
• Refilling coolant (p. 590)
• Driving with a trailer (p. 449)
• Preparing for a long trip (p. 439)
• Gear indicator
* (p. 422)

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STARTING AND DRIVING
* Option/accessory.
450 •
Follow applicable regulations regarding per- mitted speed and weight.
• Drive slowly when towing a trailer up a longand steep incline.
• The maximum trailer weights given only applyto altitudes up to 1000 meters (3280 feet)above sea level. At higher altitudes, enginepower (and thus the vehicle's climbing ability)is decreased due to the reduced air density,and the maximum trailer weight must there-fore be reduced. The weight of the vehicleand trailer must be decreased by 10% foreach additional 1000 m (3280 feet) or partthereof.
• Avoid driving with a trailer on inclines of morethan 12%.
• Avoid overloading and other incorrect use.
• The trailer's brakes must be balanced withthe vehicle's brakes to help ensure safestops (follow applicable local regulations).
CAUTION
•Bumper-attached trailer hitches must not be used on Volvos, nor should safetychains be attached to the bumper.
• Trailer hitches attaching to the vehiclerear axle must not be used.
• Never connect a trailer's hydraulic brakesystem directly to the vehicle brake sys-tem, nor a trailer's lighting system directlyto the vehicle lighting system. Consultyour nearest authorized Volvo retailer forcorrect installation.
• When towing a trailer, the trailer's safetychains or wire must be correctly fastenedto the attachment points provided in thetrailer hitch on the vehicle. The safetychain or wire must never be fastened toor wound around the towing ball.
NOTE
The optional detachable trailer hitch may not be available in all markets or on all models.Consult your Volvo retailer.
NOTE
Extreme weather conditions, towing a trailer, driving at high altitudes and fuel quality arefactors that significantly increase a vehicle'sfuel consumption.
Trailer weights
WARNING
Please adhere to the recommendations provi- ded for trailer weight. If the recommendationsare not followed, the vehicle and trailer maybe difficult to control during evasive maneu-vers and braking.
NOTE
The specified maximum trailer weights are those permitted by Volvo. National vehicleregulations may set additional restrictions ontrailer weight and speed. The trailer hitchesmay be certified for higher towing weightsthan the vehicle is permitted to tow.
Self-leveling suspension
*The vehicle's self-leveling system attempts to keep the vehicle at a constant level, regardless ofload (up to the maximum permitted weight).When the vehicle is stationary, the rear end of thevehicle will be slightly lowered, which is normal.
Driving in hilly terrain or hot weatherIn certain conditions, there is a risk of overheat-ing when driving with a trailer. If overheating ofthe engine and drive system is detected, a warn-ing symbol will illuminate in the instrument panelalong with a message.

STARTING AND DRIVING
}}
453
Disabling the automatic check
The automatic light check can be disabled in the center display. 1.Tap
Settings in the Top view.
2. Tap
My CarLights and Lighting.
3. Deselect
Automatic Trailer Lamp Check.
Manual check
If the automatic check has been disabled, the check can be started manually. 1.Tap
Settings in the Top view.
2. Tap
My CarLights and Lighting.
3. Select
Manual Trailer Lamp Check.
> The light check will begin. Get out of the vehicle to perform the check.
Related information
• Driving with a trailer (p. 449)
Towing using a towline
This section refers to one vehicle being towed behind another using a towline.
Before towing another vehicle, check applicable speed limit regulations.
Preparations and towing
CAUTION
Note that the vehicle must always be towed with the wheels rolling forward.
• Do not tow a vehicle with automatictransmission at a speed greater than80 km/h (50 mph) or for a distancegreater than 80 km (50 miles).
WARNING
•
Ignition mode
II must be active – all air-
bags are deactivated in ignition mode I.
• Always have the remote key in the vehicle when it is towed.
WARNING
The brake and steering servos do not work when the engine is off – it takesabout 5 times more pressure on the brakepedal and steering requires much more effortthan normal. 1. Turn on the hazard warning flashers.
2. Attach the towline to the towing eyelet.3.
Put the vehicle in ignition mode II – without
pressing the brake pedal, turn the start knob clockwise and hold it there for about4 seconds. Release the knob, which willautomatically return to its original position.
4. Move the gear selector to neutral ( N) and
release the parking brake. If the battery charge level is too low, it may not be possible to release the parking brake.Connect an auxiliary battery to the vehicle ifthe battery is discharged.
> The towing vehicle can now start driving.
5. Keep the towline taut when the towing vehi- cle slows down by applying light pressure to the brake pedal. This will help avoid jarringmovements.
6. Be prepared to apply the brakes to stop the vehicle.
Jump startingDo not tow the vehicle to start the engine. Use anauxiliary battery if the start battery's charge levelis so low that the engine cannot be started.

STARTING AND DRIVING
}}
* Option/accessory.457
Programming HomeLink®
*12
Follow these instructions to program HomeLink ®
, reset all programming, or program
individual buttons.
NOTE
In some vehicles, the ignition must be on or in the "accessory position" before HomeLink ®
can be programmed or used. It can be a good idea to put new batteries in the remote con- trol being replaced by HomeLink ®
for faster
programming and better radio signal trans-mission. The HomeLink ®
buttons should be
reset before programming.
WARNING
While HomeLink ®
is being programmed, the
garage door or gate being programmed may be activated. Make sure that no one is nearthe door or gate during programming. Whenprogramming a garage door opener, it isadvised to park outside of the garage. 1.
Point the remote control at the HomeLink ®
button to be programmed and hold it about 2-8 cm (1-3 inches) from the button. Do not obstruct the HomeLink ®
indicator light.
Note: Some remote controls are more effec-
tive at programming HomeLink ®
from a dis-
tance of about 15-20 cm (6-12 inches). Try moving the remote control closer or furtheraway if you are experiencing any difficultiesprogramming.
2. Press and hold both the remote control but- ton and the HomeLink ®
button to be pro-
grammed.
3. Do not release the buttons until the indicator light has stopped flashing slowly (about oncea second) and either flashes quickly (about10 times a second) or glows steadily. >Steady glow: Indication that program-
ming is complete. Press the programmed button twice to activate. Flashing quickly: The device being pro-
grammed with HomeLink ®
may have a
security function that requires an extra step. Try pressing the programmed buttontwice to see whether the programmingworks. Otherwise, continue with the fol-lowing steps.
4. Locate the "training" button 13
on the
receiver for the e.g. garage door opener. It is usually located near the antenna bracket onthe receiver.
5. Press and release the "training" button once. Programming must be completed within 30seconds after pressing the button.
6. Press and release the HomeLink ®
button to
be programmed. Repeat the press/hold/release sequence a second time. For somereceivers, the sequence may need to berepeated a third time.
> Programming is now completed and the garage door, gate, etc. should now be activated when the programmed button ispressed.
If you experience any difficulties programming, please contact HomeLink ®
at:
12 Certain markets only.
13 The name and color of the button varies depending on the manufacturer.

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STARTING AND DRIVING
* Option/accessory.
458 www.HomeLink.com, www.youtube.com/ HomeLinkGentex or call 1-800-355-3515.
Programming individual buttons
To program an individual HomeLink
®
button:
1. Press and hold the desired button for about 20 seconds.
2. When the indicator light on HomeLink ®
starts flashing slowly, it is possible to pro-gram as usual. Note: If the button you are reprogramming
does not program with a new device, it will return to the previously saved programming.
Resetting the HomeLink ®
buttons
It is only possible to reset all HomeLink ®
buttons
at once. It is not possible to reset individual but-tons. Individual buttons can only be reprogram-med.
–Press and hold the outer buttons (1 and 3) on HomeLink ®
for about 10 seconds.
> When the indicator light goes from a steady glow to flashing, the buttons have been reset and are ready for reprogram-ming.
Related information
• Using HomeLink (p. 458)
• HomeLink ®
* (p. 456)
• Type approval for HomeLink ®
* (p. 459)
Using HomeLink
Once HomeLink ®
is programmed, it can be
used instead of the separate remote controls.
Press and hold the programming button. The garage door, gate, alarm system, etc. will be acti-vated (this may take several seconds). If the but-ton is held down for more than 20 seconds,reprogramming will begin. The indicator light willglow steadily or flash when the button has beenpressed. The original remote controls may be used concurrently with HomeLink ®
if desired.
NOTE
If the ignition is off, HomeLink ®
works for
30 minutes after the driver's door has been opened.
WARNING
• If you use HomeLink ®
to open a garage
door or gate, be sure no one is near the gate or door while it is in motion.
• Do not use HomeLink ®
with any garage
door opener that lacks safety stop andreverse features as required by US fed-eral safety standards (this includes anygarage door opener model manufacturedbefore April 1, 1982). A garage door thatcannot detect an object - signaling thedoor to stop and reverse - does not meetcurrent U.S. federal safety standards. Formore information, contact HomeLink at:www.homelink.com.
Related information
• HomeLink ®
* (p. 456)
• Programming HomeLink ®
* (p. 457)
• Type approval for HomeLink ®
* (p. 459)

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WHEELS AND TIRES
* Option/accessory.
540
NOTE
Always remember to calibrate the Tire Pres- sure Monitoring System when the wheelshave been changed or the tire inflation pres-sure has been corrected according to the tirepressure decal or tire inflation pressure table. If correct reference values have not been set, the system cannot issue low tire pressurealerts correctly. The vehicle must be stationary with the engine running to access the calibration but-ton and to start the calibration process.
WARNING
The exhaust gases contain carbon monoxide, which is invisible and odorless but very poi-sonous. For this reason, always perform thecalibration procedure outdoors or in a work-shop with exhaust gas evacuation equipment.
Related information
• Recommended tire pressure (p. 537)
• Adjusting tire pressure (p. 536)
• Viewing tire pressure status in the center display
* (p. 540)
• Action when warned of low tire pressure (p. 541)
• Tire pressure monitoring system
* (p. 537)
Viewing tire pressure status in the
center display *
With the system for tire pressure monitoring, Tyre Pressure Monitoring System (TPMS), tirepressure status can be viewed in the center dis-play.
Checking status1. Open the Car status app in App view.
2.Tap TPMS to display the status of the tires.
Status indicator light
The graphic in the center display shows the sta- tus of each tire 8
.
Green tire:
• Inflation pressure is above the warning threshold.
Yellow tire:
• The tire's inflation pressure is too low. Stopand check/inflate the tire as soon as possi-ble. Recalibrate the system after adjustingthe tire pressure.
All tires yellow:
• The inflation pressure is too low in one ormore tires. Stop and check/inflate the tiresas soon as possible. Recalibrate the systemafter adjusting tire pressure.
All tires gray: • Calibration in progress.
• Status unknown.
8
The illustration is generic. Layout may vary depending on vehicle model or software version.