brake sensor VOLVO XC90 TWIN ENGINE 2018 User Guide

||DRIVER SUPPORT
* Option/accessory.
324 The driver is responsible for ensuring that
the vehicle maintains a suitable distance
from such obstacles.
• The camera and radar sensors do not
have the capacity to detect all oncoming
objects and obstacles in traffic environ-
ments, e.g. potholes, stationary obstacles
or objects that completely or partially
block the route.
• Pilot Assist does not "see" pedestrians,
animals, etc.
• The recommended steering input is lim-
ited in force, which means that it cannot
always help the driver to steer and keep
the vehicle within the lane.
• Pilot Assist is switched off if the power
steering is working with reduced power -
e.g. during cooling due to overheating
(see section "Speed-dependent steering
force").
The driver can always correct or adjust steering
assistance provided by Pilot Assist by turning the
steering wheel to the desired position.
Steep roads and/or heavy loadsPilot Assist is primarily intended to be driven on
flat roads. The function may not be able to main-
tain the correct time interval to the vehicle ahead
when driving down steep hills. The driver should be extra attentive and prepared to apply the
brakes.
• Do not use Pilot Assist if the vehicle is carry-
ing a heavy load or towing a trailer.
NOTE Pilot Assist cannot be activated if a trailer,
bike carrier or similar is connected to the
vehicle electrical system.
Other limitations
•
The
Off Road drive mode cannot be
selected when Pilot Assist is activated.
NOTE The function uses the vehicle's camera unit,
which has some general limitations – see the
section "Camera unit limitations".
NOTE
The function uses the vehicle's radar unit,
which has some general limitations – see the
section "Radar unit limitations".
Related information
•
Pilot Assist (p. 311)
• Speed-dependent steering wheel resistance
(p. 272) Pilot Assist* symbols and messages
A number of symbols and messages relating to
Pilot Assist may be displayed in the instrument
panel and/or the head-up display*.

DRIVER SUPPORT
}}
335
Recommended maintenance for the
camera/radar sensor
In order for the camera/radar sensor to function
properly, the area of the windshield in front of the
unit must be kept free of dirt, ice, snow, etc. and
should be washed regularly with water and car
washing detergent.
NOTE
Dirt, ice and snow covering the camera and
radar unit reduce their function and can make
measurement impossible.
It could cause functions to be reduced, deac-
tivated completely or produce an incorrect
function response.
Related information
•
Camera (p. 331) City Safety™
City Safety can alert the driver with light, sound
and pulsations in the brake pedal to help the
driver detect pedestrians, cyclists, large animals
and vehicles that appear suddenly – the vehicle
will then attempt to automatically brake if the
driver does not act within a reasonable amount
of time. Location of the camera and radar sensor
75
.
City Safety can help prevent a collision or lower
the vehicle's speed at the point of impact.
City Safety is an aid intended to assist the driver
if a collision with a pedestrian, large animal,
cyclist or vehicle is imminent.
City Safety can help the driver avoid a collision
when e.g. driving in stop-and-go traffic, when changes in the traffic ahead and driver distraction
could lead to an incident.
The function assists the driver by automatically
applying the brakes if there is an imminent risk of
a collision and the driver does not react in time by
braking and/or steering away.
City Safety activates a brief, forceful braking in an
attempt to stop your vehicle immediately behind
the vehicle or object ahead.
City Safety is activated in situations in which the
driver should have applied the brakes much ear-
lier, which means that the system will not be able
to assist the driver in all situations.
City Safety is designed to be activated as late as
possible to help avoid unnecessary intervention.
Normally, the occupants of the vehicle will not be
aware of City Safety except when the system
intervenes when a collision is imminent.
75
Note: This illustration is general and details may vary depending on mod\
el.

DRIVER SUPPORT
}}
337
Large animals
If there is a risk of colliding with a large animal,
City Safety can help reduce your vehicle's speed
by up to 15 km/h (9 mph).
The braking function for large animals is primarily
intended to mitigate the force of a collision at
higher speeds. Braking is most effective at
speeds above 70 km/h (43 mph) and less effec-
tive at lower speeds.
City Safety sub-functions Function overview
76
. Audio-visual collision warning
Camera/radar sensor distance monitoring City Safety carries out three steps in the follow-
ing order:
1.

Collision warning
2. Brake assistance
3. Auto-brake
Descriptions of what happens in these three
steps are provided below.
1 - Collision warning
The driver is first alerted to the risk of an immi-
nent collision.
City Safety can detect pedestrians, cyclists or
vehicles that are stationary, are moving in the
same direction as your vehicle and are ahead of
your vehicle. City Safety can also detect pedes-
trians, cyclists or large animals that are crossing
the road in front of your vehicle.
If there is a risk of a collision with a pedestrian,
large animal, cyclist or another vehicle, or with a
vehicle described in the section "City Safety in
crossing traffic", the driver will be alerted with
light, sound and pulsations in the brake pedal. At
lower speeds, during hard braking or if the accel-
erator pedal is pressed, the brake pedal pulsation
warning will not be given. The intensity of the
brake pedal pulsations varies according to the
vehicle's speed.
2 - Brake assistance
If the risk of a collision increases after the colli-
sion warning, brake support will be activated.
If the system determines that the pressure the
driver is exerting on the brake pedal is insufficient
to prevent the collision, brake support will
increase pressure. 76
Note: This illustration is general and details may vary depending on mod\
el.

DRIVER SUPPORT
345
Other limitations
WARNING•
Warnings and brake interventions can be
triggered late or not at all if the traffic sit-
uation or external influences prevent the
camera and radar unit from properly
detecting pedestrians, cyclists, large ani-
mals or vehicles ahead of the vehicle.
• To be able to detect vehicles at night, its
front and rear lights must work and illumi-
nate clearly.
• The camera and radar unit have a limited
range for pedestrians and cyclists – the
system can provide effective warnings
and brake interventions if the relative
speed is lower than 50 km/h (30 mph).
For stationary or slow-moving vehicles,
warnings and brake interventions are
effective at vehicle speeds of up to
70 km/h (43 mph). Speed reduction for
large animals is less than 15 km/h
(9 mph) and can be achieved at vehicle
speeds over 70 km/h (43 mph). At lower
speeds, the warning and brake interven-
tion for large animals is less effective.
• Warnings for stationary or slow-moving
vehicles and large animals can be disen-
gaged due to darkness or poor visibility. •
Warnings and brake interventions for
pedestrians and cyclists are disengaged
at vehicle speeds over 80 km/h
(50 mph).
• Do not place, affix or mount anything on
the inside or outside of the windshield, or
in front of or around the camera and
radar unit – this could disrupt camera-
based functions.
• Objects, snow, ice or dirt in the area of
the camera sensor can reduce the func-
tion, disengage it completely or give an
improper function response.
NOTE The function uses the vehicle's camera unit,
which has some general limitations – see the
section "Camera unit limitations".
NOTE
The function uses the vehicle's radar unit,
which has some general limitations – see the
section "Radar unit limitations".
Market limitationsCity Safety is not available in all countries. If City
Safety is not shown in the center display's
Settings menu, your vehicle is not equipped with
this function. In the center display's Top view, tap:
• Settings My Car IntelliSafe
Related information
•
City Safety™ (p. 335)

DRIVER SUPPORT
382Park Assist front, rear and sides
Park Assist has different parameters depending
on which part of the vehicle is approaching an
obstacle.
Back Note: This illustration is general and details may vary
depending on model.
The rear sensors will be activated if the vehicle
begins rolling backward or if reverse gear is
engaged.
The distance monitored begins
approx. 1.5 meters (5 feet) behind the vehicle.
The rear sensors will be automatically deactivated
if the vehicle is backing up with a trailer attached.
NOTE When reversing with e.g. a trailer or bike car-
rier on the trailer hitch – without Volvo original
trailer cables – the Parking Assist system may
have to be turned off manually to prevent the
sensors from reacting to these.
Side sensors
Park Assist's side sensors are automatically acti-
vated when the engine is started. They are active
at speeds below 10 km/h (6 mph).
The distance monitored begins approx. 30 cm
(1 ft) from the sides. The audible signal for obsta-
cles along the sides of the vehicle is emitted
from the side speakers.
Front camera Note: This illustration is general and details may vary
depending on model.
Park Assist's front sensors are automatically acti-
vated when the engine is started. The front sen-
sors are active at speeds below 10 km/h
(6 mph).
The distance monitored begins approx. 80 cm
(2.5 ft) in front of the vehicle.
NOTE
The Parking Assist system is deactivated
when the parking brake is applied or when P
is selected on vehicles with automatic trans-
mission.

||DRIVER SUPPORT
* Option/accessory.
384
CAUTION Objects such as chains, thin and glossy poles
or low obstacles may end up in the "signal
shadow" and then go temporarily undetected
by the sensors – the pulsating tone may then
unexpectedly stop instead of becoming a
constant tone as expected.
The sensors cannot detect high objects, such
as protruding ramps.
• In such situations, pay extra attention and
maneuver/drive the vehicle very slowly or
stop the current parking maneuver –
there may be a high risk of damage to
the vehicle or other objects since infor-
mation from the sensors is not always
reliable in such situations.
CAUTION In some circumstances, the Park Assist Sys-
tem may produce false warnings due to exter-
nal sound sources with the same ultrasonic
frequencies as those the system works with.
Examples of such sources are horns, wet tires
on asphalt, pneumatic brakes, exhaust noise
from motorcycles, etc.
NOTE When a trailer hitch is configured with the
vehicle electrical system, the trailer hitch pro-
trusion is included when the function meas-
ures the distance to objects behind the vehi-
cle.
Related information
•
Park Assist* (p. 381) Recommended maintenance for
Park Assist
For Park Assist to function optimally, its sensors
must be cleaned regularly with water and car
washing detergent. Location of the Park Assist sensors
115
.
NOTE Dirt, ice and snow covering the sensors could
cause false warnings, reduced function, or no
function.
Related information
•
Park Assist* (p. 381) 115
Note: This illustration is general and details may vary depending on mod\
el.

DRIVER SUPPORT
* Option/accessory.
400 Park Assist Pilot* limitations
Park Assist Pilot PAP 127
may not be able to
detect all conditions in all situations and func-
tionality may therefore be limited.
WARNING •
The PAP function is supplementary driver
support intended to facilitate driving and
help make it safer – it cannot handle all
situations in all traffic, weather and road
conditions.
• Pay particular attention to people and
animals near the vehicle.
• Bear in mind that the front end of the
vehicle may swing out towards oncoming
traffic during the parking maneuver.
• Objects situated higher than the detec-
tion area of the sensors are not included
when the parking maneuver is calculated,
which could cause PAP to swing into the
parking space too early. Such parking
spaces should be avoided for this reason.
• PAP is not a substitute for the driver's
attention and judgment. The driver is
always responsible for ensuring the vehi-
cle is driven in a safe manner, at the
appropriate speed, with an appropriate
distance to other vehicles, and in accord-
ance with current traffic rules and regula-
tions.
The driver should be aware of the following limi-
tations for Park Assist Pilot:The parking sequence is cancelledA parking sequence will be cancelled if:
• the driver moves the steering wheel
• the vehicle's speed exceeds 7 km/h (4 mph)
• the driver taps
Cancel in the center display
• when the anti-lock brakes or the Electronic
stability control are engaged - e.g. when a
wheel loses grip on a slippery road
• when the power steering works at reduced
power - e.g. during cooling due to overheat-
ing (see section "Speed-dependent steering
force").
A message in the center display will explain why
the parking sequence was cancelled.
CAUTION Under certain circumstances, PAP may not be
able to find parking spaces – one reason may
be that the sensors are disrupted by external
sound sources that emit the same ultrasonic
frequencies that the system works with.
Examples of such sources include horns, wet
tires on asphalt, pneumatic brakes, exhaust
noise from motorcycles, etc.
127
Park Assist Pilot

||STARTING AND DRIVING
430
augment braking. This is indicated in the instru-
ment panel with the pointer down in the red area.
Symbols in the instrument panel
Symbol
Meaning A
B
Check the brake fluid level. If the
level is low, fill brake fluid and
check to determine the reason for
the loss of brake fluid. A
B
Fault in pedal sensor. Symbol
Meaning A
B
Steady glow for 2 seconds after
the engine is started: Automatic
function check.
Steady glow for more than 2 sec-
onds: Fault in the ABS system. The
vehicle's regular brake system is
still working, but without the ABS
function. If the message Brake pedal Cha-
racteristics changed Service
required is displayed, the "Brake-
by-wire" system is not functioning
properly. The brake pedal will go
down further than normal and
greater pressure will be needed on
the pedal to achieve braking effect. A
Canadian models.
B US models.
WARNING •
If both symbols illuminate at the same
time and the brake level is below the MIN
mark in the reservoir or if a brake system-
related message is shown in the instru-
ment panel: DO NOT DRIVE. Have the
vehicle towed to a trained and qualified
Volvo service technician and have the
brake system inspected.
• If both symbols illuminate at the same
time and the brake level is normal (not
below the MIN mark in the reservoir) or if
a brake system-related message is
shown in the instrument panel: drive the
vehicle carefully to an authorized Volvo
workshop and have the brake system
inspected by a trained and qualified Volvo
service technician.
Related information
• Brake Assist System (p. 431)
• Auto-hold brakes (p. 436)
• Hill Start Assist (p. 437)
• Braking on wet roads (p. 431)
• Braking on salted roads (p. 431)
• Maintenance of the brake system (p. 432)
• Brake lights (p. 160)

||MAINTENANCE AND SERVICE
* Option/accessory.
624 Function
AA 12 V outlet in trunk/cargo com-
partment*
USB ports for iPad holders
C15 –
––
––
––
–Heated windshield*, left side
ShuntHeated windshield*, left side
40Headlight washers*
25Windshield washer
25–
–Horn
20Alarm siren*
5Brake system control module
(valves, parking brake)
40Wipers
30Rear window washer
25 Function
AA Heated windshield*, right side
40 Parking heater*
20 Brake system control module
(ABS pump)
40 –
– Heated windshield*, right side
Shunt Fed when ignition is on: Engine
control module; transmission
components, electrical power
steering, central electrical mod-
ule
5 Exterior vehicle sound (certain
markets)
5 Right-side headlight
7.5
Right-side headlight, some mod-
els with LED D 15 –
– –
– –
– Airbags
5 Function
AA Left-side headlight
7.5
Left-side headlight, some mod-
els with LED D 15 Accelerator pedal sensor
5 Transmission control module;
gear selector control module
15 Engine control module
5 –
– –
– –
– –
– Engine control module; actuator;
throttle unit; turbo-charger valve
20 Solenoids; valve; engine cooling
system thermostat
10 Vacuum regulators; valve 7.5
Spoiler shutter control module;
radiator shutter control module
5 –
–

MAINTENANCE AND SERVICE
}}
* Option/accessory. 627
Fuse pliers are provided on the inside of the fuse
box cover to assist in removing and inserting
fuses.
There are also spaces for several extra fuses in
the 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-
shop 18
. Function
AA –
––
––
–Movement sensor*
5Media player
5Instrument panel
5Center console buttons
5Sun sensor
5 Function
AA –
– –
– Steering wheel module
5 Module for start knob and parking
brake controls
5 Heated steering wheel* module
15 –
– –
– –
– –
– Climate system control module 10
–
– Data link connector OBD-II 10
Center display
5 Climate system blower module
(front)
40 USB HUB
5 Function
AA Instrument lighting; Interior lighting;
Rearview mirror auto-dim function*;
Rain and light sensors*; Rear tun-
nel console keypad, second row of
seats* B
; Power front seats*; Rear
door control panels; Climate sys-
tem blower module left/right
Power rear seats C
; Display for rear
seat convenience functions C
; Rear
seat massage function C7.5 Control module for driver support
functions
5 Panoramic roof with sun curtain*
20 Head-up display*
5 Passenger compartment lighting 5
–
– Ceiling console display (seat belt
reminder/front passenger side air-
bag indicator)
5 –
– Humidity sensor
518
An authorized Volvo workshop is recommended.