warning light VOLVO XC90 TWIN ENGINE 2018 Repair Manual

STARTING AND DRIVING
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437
When shutting offIf the function is active and holding the
vehicle stationary using the normal
brakes (A symbol lit), the brake pedal
must be depressed while pressing the
button in order to deactivate Auto-hold. •
The function will remain off until it is reactiva-
ted.
• When Auto-hold is switched off, Hill Start
Assist (HSA) will remain active to help pre-
vent the vehicle from rolling backward when
starting up a hill.
Related information
•Auto-hold brakes (p. 436) Hill Start Assist
The function for assisting when starting the vehi-
cle on inclines, Hill Start Assist (HSA), helps
prevent the vehicle from rolling backward when
starting on an uphill gradient. When backing up
a hill, HSA helps prevent the vehicle from rolling
forward.
The function retains pressure from the brake
pedal in the brake system for several seconds
after the brake pedal has been released.
This temporary braking effect is released after a
few seconds or when the driver begins driving.
Hill Start Assist is available even if the Auto-hold
brake function is switched off.
Related information
• Auto-hold brakes (p. 436)
• Brakes (p. 429) Braking assist after a collision
In a collision in which the activation level is
reached for the pyrotechnic seat belt tensioners
or airbags, or if a collision with a large animal is
detected, the vehicle's brakes will be automati-
cally activated. This function is intended to help
prevent or reduce the effects of any subsequent
collision.
After a serious collision, it may no longer be pos-
sible to control and steer the vehicle. In order to
avoid or mitigate a possible further collision with
a vehicle or an object in the vehicle's path, the
brake assist system is activated automatically to
help stop the vehicle safely.
The brake lights and hazard warning flashers are
activated during braking. When the vehicle has
stopped, the hazard warning flashers will con-
tinue to flash and the parking brake will be
applied.
If braking is not appropriate, e.g. if there is a risk
of being hit by passing traffic, the driver can over-
ride the system by depressing the accelerator
pedal.
This function assumes that the brake system is
intact after a collision.
Brake assist is part of the Rear Collision Warning
and Blind Spot Information safety systems.

||STARTING AND DRIVING
454
NOTE
When LSC with HDC is activated in the OFF
ROAD drive mode, the feel of the accelerator
pedal and engine response will 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 lower
speeds if so desired.
Related information
•
Activating and deactivating Low Speed Con-
trol using the function button (p. 454)
• Changing drive mode (p. 449)
• Hill Descent Control (p. 454)
• All Wheel Drive (AWD) (p. 443) Activating and deactivating Low
Speed Control using the function
button
Vehicles that are not equipped with drive mode
controls in the tunnel console have a function
button for Low Speed Control with Hill Descent
Control in the center display's Function view.
Selecting Low Speed Control in the
center display's Function view
– Tap the Hill Descent Control button to
activate or deactivate the function. > An indicator light in the button will illumi-
nate when the function is activated.
When the engine is switched off, the function will
be automatically deactivated.
NOTE The function is deactivated when driving at
high speeds and must be reactivated at lower
speeds if so desired.
Related information
•
Low Speed Control (p. 453)
• Changing drive mode (p. 449) Hill Descent Control
The function for assisting when driving downhill,
Hill Descent Control (HDC), is a low-speed
function with increased engine braking. The
function makes it possible to increase or
decrease the vehicle's speed on steep downhill
gradients by only using the accelerator pedal,
without applying the brakes.
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 slippery
or otherwise difficult road surfaces. The driver
does not need to use the brake pedal but can
instead 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 assisted
by the brake system. The driver can increase the
speed by pressing the accelerator pedal. When
the accelerator pedal is released, the vehicle will
return to very low speed regardless of how steep

STARTING AND DRIVING
* Option/accessory.
468 Overheating of engine and
transmission
In demanding driving conditions, such as driving
in mountainous areas or hot weather, there is a
risk 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 cooling
system becomes too high, a warning symbol
will 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, an
alternative gear shifting program will be
selected. An integrated protective function
will 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 transmission
cool.
• If the vehicle begins to overheat, the air con-
ditioning may be temporarily switched off.
• After a prolonged period of driving in
demanding conditions, do not turn off the
engine immediately after stopping.
NOTE It is normal for the engine's cooling fan to
operate for a short time after the engine is
switched off.
Symbols in the instrument panel
Symbol
Meaning High engine temperature. Follow
the recommendations provided.
Low coolant level. Follow the rec-
ommendations provided.
Transmission hot/overheated/cool-
ing. Follow the recommendations
provided.
Related information
•
Refilling coolant (p. 612)
• Driving with a trailer (p. 472)
• Preparing for a long trip (p. 460)
• Gear indicator* (p. 442)

||STARTING AND DRIVING
470
1.
Put the ignition in mode 0.
2. Make sure the auxiliary battery (the battery used 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 sure
that the vehicles are not touching each other.
4. Clamp the red jumper cable onto the auxiliary battery's positive (+) terminal (1).
CAUTION Connect the jump cable carefully to prevent
short circuits with other components in the
engine 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 cable
to 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 jumper cable to your vehicle's negative (-) ground
point (4).
9. Make sure the jumper cables are securely attached to help prevent sparks while jump
starting. 10. Start the engine of the assisting vehicle and
let it run for a few minutes at a higher idling
speed than normal, about 1500 rpm.
11. Start your vehicle's engine. If the engine does not start, allow an additional 10
minutes of charging time and then try to start
the engine again.
NOTE When the engine is started under normal
conditions, the vehicle's electrical drive motor
is prioritized – the gasoline engine remains
off. This means that the electric motor has
"started" and the vehicle is ready to be driven
once the start knob has been turned clock-
wise. Start of the electric motor is indicated
by the indicator lights on the instrument panel
going out and its preselected theme illuminat-
ing.
CAUTION
Do not touch the connections between the
cable and the vehicle during the start attempt.
Risk of sparking. 12. Remove the jumper cables in the reverse
order ‒ first the black cables and then the
red cables.
Make sure that none of the clamps of the
black jumper cables come into contact with
either vehicle's positive (+) jump start termi-
nals or either of the red jumper cable's con-
nected clamps.
WARNING PROPOSITION 65 VARNING!WARNING!
Battery posts, terminals, and related accesso-
ries contain lead and lead compounds, chemi-
cals known to the state of California to cause
cancer and reproductive harm. Wash hands
after handling.
WARNING
•
Batteries generate hydrogen gas, which
is flammable and explosive.
• Do not connect the jumper cable to any
part of the fuel system or to any moving
parts. Avoid touching hot manifolds.
• Battery fluid contains sulfuric acid. Do not
allow battery fluid to contact eyes, skin,
fabrics or painted surfaces.

STARTING AND DRIVING
* Option/accessory.473
CAUTION•
Bumper-attached trailer hitches must not
be used on Volvos, nor should safety
chains be attached to the bumper.
• Trailer hitches attaching to the vehicle
rear axle must not be used.
• Never connect a trailer's hydraulic brake
system directly to the vehicle brake sys-
tem, nor a trailer's lighting system directly
to the vehicle lighting system. Consult
your nearest authorized Volvo retailer for
correct installation.
• When towing a trailer, the trailer's safety
chains or wire must be correctly fastened
to the attachment points provided in the
trailer hitch on the vehicle. The safety
chain or wire must never be fastened to
or 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 are
factors that significantly increase a vehicle's
fuel consumption.
Trailer weights
WARNING Please adhere to the recommendations provi-
ded for trailer weight. If the recommendations
are not followed, the vehicle and trailer may
be difficult to control during evasive maneu-
vers and braking.
NOTE
The specified maximum trailer weights are
those permitted by Volvo. National vehicle
regulations may set additional restrictions on
trailer weight and speed. The trailer hitches
may be certified for higher towing weights
than 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 of
load (up to the maximum permitted weight).
When the vehicle is stationary, the rear end of the
vehicle 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 of
the engine and drive system is detected, a warn-
ing symbol will illuminate in the instrument panel
along with a message.The automatic transmission selects the optimal
gear for the current load and engine speed.
Steep inclines
Do not lock the automatic transmission into a
higher gear than what the engine can handle ‒ it
is not always preferable to drive in high gears at
low rpm.
Parking on a hill
1. Depress the brake pedal.
2. Apply the parking brake.
3. Put the gear selector in P.
4. Release the brake pedal.
Put chocks behind the wheels when the vehicle
is parked on a hill with a trailer attached.
Starting on a hill
1. Depress the brake pedal.
2. Put the gear selector in D.
3. Release the parking brake.
4. Release the brake pedal and start driving.
Related information
• Trailer Stability Assist* (p. 474)
• Checking trailer lights (p. 475)
• Towing capacity and tongue weight (p. 660)
• Overheating of engine and transmission
(p. 468)

||STARTING AND DRIVING
* Option/accessory.
478
WARNING No person or object should be behind the tow
truck when the vehicle is lifted onto the bed
of the truck.
Related information
•
Attaching and removing the towing eyelet
(p. 476) HomeLink
®
*10
HomeLink ®11
is a programmable remote control,
integrated in the vehicle electrical system, that
can control up to three different devices (e.g.
garage door opener, alarm system, outdoor and
indoor lighting, etc.) and thereby replace the
remote controls for these.
General The illustration is generic – the design may vary.
Button 1
Button 2
Button 3
Indicator lightHomeLink
®
is delivered integrated in the rearview
mirror. The HomeLink ®
panel consists of three
programmable buttons and an indicator light in
the mirror.
For more information about HomeLink ®
, please
visit www.HomeLink.com, www.youtube.com/
HomeLinkGentex or call 1-800-355-3515.
Save the original remote controls for future pro-
gramming (e.g. for use in another vehicle). It is
also advisable to delete the button programming
if the vehicle is sold.
Related information
• Using HomeLink (p. 480)
• Programming HomeLink ®
* (p. 479)
• Type approval for HomeLink ®
* (p. 481) 10
Certain markets only.
11 HomeLink and the HomeLink house symbol are registered trademarks of Gent\
ex Corporation.

STARTING AND DRIVING
}}
* Option/accessory. 479
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 near
the door or gate during programming. When
programming a garage door opener, it is
advised 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 further
away if you are experiencing any difficulties
programming.
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 once
a second) and either flashes quickly (about
10 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 button
twice to see whether the programming
works. 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 on
the receiver.
5.

Press and release the "training" button once.
Programming must be completed within 30
seconds after pressing the button.
6. Press and release the HomeLink ®
button to
be programmed. Repeat the press/hold/
release sequence a second time. For some
receivers, the sequence may need to be
repeated a third time.
> Programming is now completed and the garage door, gate, etc. should now be
activated when the programmed button is
pressed.
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.

||STARTING AND DRIVING
* Option/accessory.
480 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. 480)
• HomeLink ®
* (p. 478)
• Type approval for HomeLink ®
* (p. 481) 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 will
glow steadily or flash when the button has been
pressed. 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 and
reverse features as required by US fed-
eral safety standards (this includes any
garage door opener model manufactured
before April 1, 1982). A garage door that
cannot detect an object - signaling the
door to stop and reverse - does not meet
current U.S. federal safety standards. For
more information, contact HomeLink at:
www.homelink.com.
Related information
• HomeLink ®
* (p. 478)
• Programming HomeLink ®
* (p. 479)
• Type approval for HomeLink ®
* (p. 481)

||WHEELS AND TIRES
* Option/accessory.
562
NOTE Always remember to calibrate the Tire Pres-
sure Monitoring System when the wheels
have been changed or the tire inflation pres-
sure has been corrected according to the tire
pressure decal or tire inflation pressure table.
If correct reference values have not been set,
the system cannot issue low tire pressure
alerts 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 the
calibration procedure outdoors or in a work-
shop with exhaust gas evacuation equipment.
Related information
•
Recommended tire pressure (p. 559)
• Adjusting tire pressure (p. 558)
• Viewing tire pressure status in the center
display* (p. 562)
• Action when warned of low tire pressure
(p. 563)
• Tire pressure monitoring system* (p. 559) Viewing tire pressure status in the
center display*
With the system for tire pressure monitoring,
Tyre Pressure Monitoring System (TPMS), tire
pressure 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. Stop
and check/inflate the tire as soon as possi-
ble. Recalibrate the system after adjusting
the tire pressure.
All tires yellow:
• The inflation pressure is too low in one or
more tires. Stop and check/inflate the tires
as soon as possible. Recalibrate the system
after 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.

WHEELS AND TIRES
}}
* Option/accessory. 565
Jack*
The jack can be used to lift the vehicle to e.g.
change a wheel. The illustration is generic – the design may vary.
CAUTION •
When not in use, the jack* should be kept
in its storage compartment under the
cargo compartment floor.
• The jack provided with your vehicle is
intended to be used only in temporary sit-
uations such as changing wheels in the
event of a flat tire. Only the jack that
came with your particular model should
be used to lift the vehicle. If the vehicle
needs to be lifted more frequently or for a
prolonged period, using a garage jack or
hoist is recommended. Always follow this
device's instructions for use. The jack needs to be cranked together to the
correct position in order to fit.
Models with leveling control*
If the vehicle is equipped with the optional pneu-
matic suspension, it must be turned off before
the vehicle is lifted on a jack.
Related information
•
Tool kit (p. 564) Wheel bolts
The wheel bolts hold the wheel in place on the
wheel hub.
CAUTION The wheel bolts should be tightened to
140 Nm (103 ft. lbs.). Over-tightening or
under-tightening could damage the threaded
joints.
Only use rims that have been tested and
approved by Volvo and are included in Volvo's
original product range.
Use a torque wrench to check that the wheel
bolts are tightened correctly.
Do not grease the wheel bolt threads.
WARNING
The wheel bolts may need to be tightened
again several days after a wheel change.
Temperature fluctuations and vibrations can
cause them to loosen slightly.
Locking wheel bolts*A tool for removing the locking wheel bolts is
located in the foam block under the cargo com-
partment floor.