2009 VOLVO S80 brake sensor

04 Comfort and driving pleasureAdaptive Cruise Control–ACC (option)
04168
WARNING
•
Only use a time interval that is suitable
in current traffic conditions.
•
A short time interval gives the driver lim-
ited reaction time if an unexpected sit-
uation occurs in traffic.
The number of bars indicating the selected
time interval are shown while the setting is
being made and for several seconds afterward.
A smaller version of the symbol is then shown
to the right in the display. The same symbol is
also displayed when Distance Alert is acti-
vated, see page 172 .Deactivating and resuming settingsCruise control is deactivated, either with a
short press on
, or by action taken by the
driver, such as braking, etc. The set speed, for
example 55 mph, is then shown in parenthe-
ses. Speed and time interval are resumed by
pressing
.
WARNING
There may be a significant increase in speed
after the
button has been pressed.
A short press on
in standby mode or a long
press in active mode deactivates cruise con-trol. The set speed is then cleared and cannot
be resumed.
When ACC is activated, the vehicle’s speed
increases by approximately 1 mph (1 km/h)
each additional time
is pressed.
Deactivation due to action by the driverACC is deactivated:•
when the brakes are applied
•
if the gear selector is moved to N
•
if the accelerator pedal is depressed for an
extended period.NOTE
If the accelerator pedal is only depressed for
a short time, such as when passing another
vehicle, ACC is deactivated temporarily and
is reactivated when the pedal is released.Automatic deactivationAdaptive cruise control is linked to other sys-
tems such as ABS, the stability and traction
control system (DSTC), and the Distance Alert
System. If any of these systems are not func-
tioning properly, adaptive cruise control is
automatically deactivated.
In the event of automatic deactivation a signal
will sound and the message
Cruise Control
Canceled
is shown in the display. The drivermust then intervene and adapt the vehicle's
speed to the surrounding traffic.
Automatic deactivation may be caused if:
•
the vehicle's speed falls below 20 mph
(30 km/h)
•
the wheels lose traction or if the anti-lock
brake system (ABS) is activated
•
brake temperature is high
•
engine speed (rpm) is too low
•
the radar sensor is obstructed by, for
example, wet snow or rain.
The radar sensor and its limitationsThe radar sensor is used by both Adaptive
Cruise Control and the Collision Warning Sys-
tem with Auto-brake. It is designed to detect
cars or larger vehicles driving in the same
direction as your vehicle.
WARNING
Accessories or other objects, such as extra
headlights, must not be installed in front of
the grille.
Modification of the radar sensor could make
its use illegal.The radar sensor's capacity to detect vehicles
ahead is impeded:

04 Comfort and driving pleasure
Adaptive Cruise Control–ACC (option)
04``169
•
if the radar sensor is obstructed and can-
not detect other vehicles, for example in
heavy rain, or if snow or other objects are
obscuring the radar sensor.NOTE
Keep the area in front of the radar sensor
clean.•
if the speed of vehicles ahead is signifi-
cantly different from your own speed.WARNING
The radar sensor has a limited field of vision.
In some situations it may detect a vehicle
later than expected or not detect vehicles at
all.
G021414
Radar sensor field of vision (gray)
In certain situations, the radar sensor can-
not detect vehicles at close quarters, for
example a vehicle that suddenly enters thelanes between your vehicle and the one
that the system has already detected.
Small vehicles, such as motorcycles, or
vehicles not driving in the center of the lane
may remain undetected.In curves, the radar sensor may detect the
wrong vehicle or lose a detected vehicle
from view.
Fault tracing and actionsIf the message
Radar blocked See manual
is
displayed, this means that the radar signals
from the sensor have been obstructed and that
a vehicle ahead cannot be detected.
This, in turn, means that the functions of the
ACC, Distance Alert, and Collision Warning
System with Auto-brake will not function.
The table lists possible causes for this mes-
sage being displayed, and suitable actions.
Cause
Action
The surface of the radar in the grille is dirty or obstructed in some way.
Clean the radar surface, or remove the object causing the obstruction.
Heavy rain or snow is interfering with the radar signals.
No action possible. Heavy precipitation may affect the function of the
radar.

04 Comfort and driving pleasureAdaptive Cruise Control–ACC (option)
04170
Cause
Action
Swirling water or snow from the surface of the road may interfere with
the radar signals.
No action possible. A very wet or snow-covered road surface may affect
the function of the radar.
The surface of the radar is clean but the message remains in the display.
Wait a short time. It may take several minutes for the radar to detect that
it is no longer obstructed.
Symbols and messages in the displaySymbol
Message
DescriptionStandby mode or active mode when no other vehicle has been detected.Active mode with a detected vehicle to which ACC is adapting speed/distance.Time interval while it is being set.Time interval after it has been set.
Turn on DSTC
to enable Cruise
ACC cannot be activated until the stability system (DSTC) has been activated. see page 154 for more
information on DSTC.
Cruise control canceled
ACC has been automatically switched off.
The driver must regulate the vehicle’s speed/distance to the vehicle ahead.
Cruise control unavailable
ACC cannot be activated. This may be due to:•
high brake temperature
•
the radar sensor is obstructed (by heavy rain, snow, etc.)

04 Comfort and driving pleasureDistance alert
04174
Symbol
Message
Description
Radar blockd
See manual
Distance Alert has been temporarily disconnected because the radar is obstructed in some way and
cannot detect other vehicles. See page 168 for information on the radar sensor’s limitations.
Collision warn.
Service required
Distance Alert or Collision Warning with Auto-brake is not functioning properly. Contact a trained and
qualified Volvo service technician.

04 Comfort and driving pleasurePark assist (option)
04180
IntroductionThe park assist system is designed to assist
you when driving into parking spaces, garages,
etc. It utilizes four ultrasound sensors located
in one or both bumpers to measure the dis-
tance to a vehicle, object, or a person who may
be close to the front or rear of your vehicle.
This system is available in the rear bumper
only, or in both the front and rear bumpers.
Park assist utilizes four ultrasound sensors in
the bumper(s) to measure the distance to a
vehicle, object, or a person who may be close
to the front or rear of your vehicle. An audible
signal and symbols in the audio system’s dis-
play indicate the distance to the object
WARNING
Park Assist is an information system, NOT a
safety system. This system is designed to
be a supplementary aid when parking the
vehicle. It is not, however, intended to
replace the driver's attention and judge-
ment.
Function
G018386
Park assist buttonThe system is activated automatically when the
vehicle is started. The indicator light in the but-
ton in the center console illuminates when the
system is on.•
The front park assist system is active from
the time the engine is started until the vehi-
cle exceeds a speed of approximately
10 mph (15 km/h). It is also active when the
vehicle is backing up.
•
Rear park assist is active when the engine
is running and reverse gear has been
selected.
Activating/deactivatingThe system is activated automatically when the
vehicle is started.
±
Press the Park assist button on the center
console to temporarily deactivate the sys-
tem(s).
> The indicator light in the button will go
out when the system has been deacti-
vated.
Park assist will be automatically reactivated the
next time the engine is started, or if the button
is pressed (the indicator light in the button will
illuminate).
NOTE
•
Front park assist is disengaged auto-
matically when the parking brake is
applied.
•
If the vehicle is equipped with front and
rear park assist, both systems will be
deactivated by pressing the button.

04 Comfort and driving pleasurePark assist (option)
04182
Front park assist
G021424
The distance monitored in front of the vehicle
is approximately 2.5 ft (0.8 m). The audible sig-
nal comes from the audio system's front
speakers.
It may not be possible to combine auxiliary
headlights and front park assist since these
lights could trigger the system's sensors.Faults in the systemIf the information symbol illuminates and
Park
Assist syst Service required
is shown on the
information display, this indicates that the sys-
tem is not functioning properly and has been
disengaged. Consult a trained and qualified
Volvo service technician.
CAUTION
In certain circumstances, the park assist
system may give unexpected warning sig-
nals that can be caused by external sound
sources that use the same ultrasound fre-
quencies as the system. This may include
such things as the horns of other vehicles,
wet tires on asphalt, pneumatic brakes,
motorcycle exhaust pipes, etc. This does
not indicate a fault in the system.Cleaning the sensors
G028933
G021425
Location of the rear sensorsThe sensors must be cleaned regularly to
ensure that they work properly. Clean them
with water and a suitable car washing deter-
gent.
Ice and snow covering the sensors may cause
incorrect warning signals.
NOTE
If the sensors are obstructed by e.g., dirt,
snow, or ice, this could result in false warn-
ing signals from the park assist system.

06 Maintenance and specifications
Fuses
06``237 Under the glove compartment
10
11
12
13
14
1
2
3
4
56
7
8
923
22
21
20
19
18 17 16
15
24
25
26
27
28
G032918
Fold aside the iupholstery covering the fuse
box.
1. Press the cover's lock and fold it up.
2. The fuses are accessible.Positions
Function
A
Rain sensor (option)
5
SRS system
10
ABS brakes. Electric parking
brake
5
Function
A
Accelerator pedal, heated
seats (option)
7.5
–ICM display, CD & Radio
15
Steering wheel module
7.5
–High beam
15
Function
A
Moonroof (option)
20
Backup lights
7.5
–Front fog light (option)
15
Windshield washers
15
Adaptive cruise control ACC
(option)
10

06 Maintenance and specificationsFuses
06238
Function
A
–Overhead courtesy lighting,
Control panel driver's door/
Power passenger seat (option)
7.5
Information display
5
Power driver's seat (option)
5
–Remote key receiver, Alarm
sensors
5
Fuel pump
20
Electric steering column lock
20
–Lock, tank/trunk
10
Alarm siren. ECC
5
START/STOP ENGINE button
5
Brake light switch
5