brake sensor VOLVO S80 2008 Owners Manual

in our plants 50% since 1991.
Volvo was the first in the world to introduce into production a three-way catalytic converter with a Lambda sond, now
called the heated oxygen sensor, in 1976. The current version of this highly efficient system reduces emissions of
harmful substances (CO, HC, NOx) from the exhaust pipe by approximately 95-99% and the search to eliminate the
remaining emissions continues. Volvo is the only automobile manufacturer to offer CFC-free retrofit kits for the air
conditioning system of all models as far back as the 1975 model 240. Advanced electronic engine controls and cleaner
fuels are bringing us closer to our goal. After Volvo vehicles and parts have fulfilled their use, recycling is the next
critical step in completing the life cycle. The metal content is about 75% of the total weight of a vehicle, which makes
the vehicle among the most recycled industrial products. In order to have efficient and well-controlled recycling,
dismantling information is available for all Volvo models. For Volvo, all homogeneous plastic parts weighing more
than 3.4 oz. (100 grams) are marked with international symbols that indicate how the component is to be sorted for
recycling. In addition to continuous environmental refinement of conventional gasoline-powered internal combustion
engines, Volvo is actively looking at advanced technology alternative-fuel vehicles.
When you drive a Volvo, you become our partner in the work to lessen the car's impact on the environment. To reduce
your vehicle's environmental impact, you can:
Maintain proper air pressure in your tires. Tests have shown decreased fuel economy with improperly inflated tires.
Follow the recommended maintenance schedule in your Warranty and Service Records Information booklet.
Drive at a constant speed whenever possible.
See a trained and qualified Volvo service technician as soon as possible for inspection if the check engine (
malfunction indicator) light illuminates, or stays on after the vehicle has started.
Properly dispose of any vehicle-related waste such as used motor oil, used batteries, brake pads, etc.
When cleaning your vehicle, please use genuine Volvo car care products. All Volvo car care products are
formulated to be environmentally friendly.
WARNING
PROPOSITION 65 WARNING!
Engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the
state of California to cause cancer, and birth defects or other reproductive harm. In addition, certain fluids contained
in vehicles and certain products of component wear contain or emit chemicals known to the State of California to
cause cancer, and birth defects or other reproductive harm.
10 Introduction
WARNING
Certain components of this vehicle such as air bag modules, seat belt pretensioners, adaptive steering columns, and
button cell batteries may contain Perchlorate material. Special handling may apply for service or vehicle end of life
disposal.
See www.dtsc.ca.gov/hazardouswaste/perchlorate
.
11 Introduction
This page left intentionally blank.

in our plants 50% since 1991.
Volvo was the first in the world to introduce into production a three-way catalytic converter with a Lambda sond, now
called the heated oxygen sensor, in 1976. The current version of this highly efficient system reduces emissions of
harmful substances (CO, HC, NOx) from the exhaust pipe by approximately 95-99% and the search to eliminate the
remaining emissions continues. Volvo is the only automobile manufacturer to offer CFC-free retrofit kits for the air
conditioning system of all models as far back as the 1975 model 240. Advanced electronic engine controls and cleaner
fuels are bringing us closer to our goal. After Volvo vehicles and parts have fulfilled their use, recycling is the next
critical step in completing the life cycle. The metal content is about 75% of the total weight of a vehicle, which makes
the vehicle among the most recycled industrial products. In order to have efficient and well-controlled recycling,
dismantling information is available for all Volvo models. For Volvo, all homogeneous plastic parts weighing more
than 3.4 oz. (100 grams) are marked with international symbols that indicate how the component is to be sorted for
recycling. In addition to continuous environmental refinement of conventional gasoline-powered internal combustion
engines, Volvo is actively looking at advanced technology alternative-fuel vehicles.
When you drive a Volvo, you become our partner in the work to lessen the car's impact on the environment. To reduce
your vehicle's environmental impact, you can:
Maintain proper air pressure in your tires. Tests have shown decreased fuel economy with improperly inflated tires.
Follow the recommended maintenance schedule in your Warranty and Service Records Information booklet.
Drive at a constant speed whenever possible.
See a trained and qualified Volvo service technician as soon as possible for inspection if the check engine (
malfunction indicator) light illuminates, or stays on after the vehicle has started.
Properly dispose of any vehicle-related waste such as used motor oil, used batteries, brake pads, etc.
When cleaning your vehicle, please use genuine Volvo car care products. All Volvo car care products are
formulated to be environmentally friendly.
WARNING
PROPOSITION 65 WARNING!
Engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the
state of California to cause cancer, and birth defects or other reproductive harm. In addition, certain fluids contained
in vehicles and certain products of component wear contain or emit chemicals known to the State of California to
cause cancer, and birth defects or other reproductive harm.
10 Introduction
WARNING
Certain components of this vehicle such as air bag modules, seat belt pretensioners, adaptive steering columns, and
button cell batteries may contain Perchlorate material. Special handling may apply for service or vehicle end of life
disposal.
See www.dtsc.ca.gov/hazardouswaste/perchlorate
.
11 Introduction
This page left intentionally blank.

which could result in personal injury. Have the vehicle towed to a trained and qualified Volvo service technician for
repairs.
Automatic transmission:
Before attempting to tow the vehicle, use the following procedure to override the shiftlock system to move the gear
selector to the neutral position:
Switch off the ignition for at least 10 minutes and disconnect the battery
Wait at least one minute.
Insert the remote control into the ignition slot and press the Start button (without depressing brake pedal) to go to
ignition mode II. See page 80
for more information.
Press firmly on the brake pedal.
Move the gear selector from Park ( P) to the Neutral ( N) position. See page 111 for information on manually
overriding the shiftlock system.
19 01 Safety
Safety in the passenger compartment
Front airbags
The front airbag system
The front airbags supplement the three-point seat belts. For these airbags to provide the protection intended, seat belts
must be worn at all times.
The front airbag system includes gas generators surrounded by the airbags, and deceleration sensors that activate the
gas generators, causing the airbags to be inflated with nitrogen gas.
As the movement of the seats' occupants compresses the airbags, some of the gas is expelled at a controlled rate to
provide better cushioning. Both seat belt pretensioners also deploy, minimizing seat belt slack. The entire process,

WARNING
Any contact between the front seat backrests and the folded rear seat or a rear-facing child seat could impede the
function of the WHIPS system. If the rear seat is folded down, the occupied front seats must be adjusted forward so
that they do not touch the folded rear seat.
30 01 Safety
Crash mode
Driving after a collision
If the vehicle has been involved in a collision, the text SAFETY MODE SEE MANUAL may appear in the
information display. This indicates that the vehicle's functionality has been reduced.
NOTE
This text can only be shown if the display is undamaged and the vehicle's electrical system is intact.
Safety mode is a feature that is triggered if one or more of the safety systems (e.g. front or side airbags, an inflatable
curtain, or one or more of the seat belt pretensioners) has deployed. The collision may have damaged an important
function in the vehicle, such as the fuel lines, sensors for one of the safety systems, the brake system, etc.
WARNING
Never attempt to repair the vehicle yourself or to reset the electrical system after the vehicle has displayed
SAFETY MODE SEE MANUAL. This could result in injury or improper system function.
Restoring the vehicle to normal operating status should only be done by a trained and qualified Volvo service
technician.
After SAFETY MODE SEE MANUAL has been displayed, if you detect the odor of fuel vapor, or see any signs
of fuel leakage, do not attempt to start the vehicle. Leave the vehicle immediately.

157 04 Comfort and driving pleasure
Adaptive Cruise Control-ACC
WARNING
Adaptive cruise control is not a collision avoidance system. The driver is always responsible for applying the
brakes if the system does not detect another vehicle.
Adaptive cruise control does not react to slow moving or stationary vehicles.
The distance to the vehicle ahead (in the same lane) is measured by a radar sensor. Your vehicle's speed is regulated by
acceleration and braking. The brakes may emit a sound when they are being modulated by the adaptive cruise control
system. This is normal.
WARNING
The brake pedal moves when the adaptive cruise control system modulates the brakes. Do not rest your foot under
the brake pedal.
The adaptive cruise control system is designed to follow the vehicle ahead of you in the same lane, at a set time
interval.
If the radar sensor has not detected a vehicle ahead, the system will then attempt to maintain the set speed. This is also
the case if the speed of the vehicle ahead exceeds the speed that you have set.
The adaptive cruise control system is designed to smoothly regulate speed. However, the driver must apply the brakes
in situations that require immediate braking. This applies when there are great differences in speed between vehicles,
or if the vehicle ahead brakes suddenly.
WARNING
Due to limitations in the radar sensor, braking may occur unexpectedly or not at all, see page 160
.
Adaptive cruise control can only be activated at speeds above 20 mph (30 km/h). If speed falls below 20 mph (30
km/h) or if engine speed (rpm) becomes too low, adaptive cruise control disengages and will no longer modulate the
brakes. In situations when adaptive cruise control cannot be activated Cruise Control Unavailable is shown in the
display, see page 166
.
WARNING
When adaptive cruise control disengages, the brakes will not be modulated automatically. The driver must assume
full control over the vehicle.
Warning light -driver braking required
Adaptive cruise control has a braking capacity that is equivalent to approximately 30% of the vehicle's total braking
capacity. In situations requiring more brake force than ACC can provide, if the driver does not apply the brakes, an
audible signal will sound and a red warning light will illuminate in the windshield to alert the driver to react.
NOTE

Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight
ahead may make the visual warning signal in the windshield difficult to see.
WARNING
Cruise control only warns of vehicles detected by the radar sensor, see page 160
. In some cases there may be no
warning or the warning may be delayed. The driver should always apply the brakes when necessary.
158 04 Comfort and driving pleasure
Adaptive Cruise Control-ACC
Operation
Activate and resume settings, increase speed
Standby mode, On/Off
Set a time interval
Activate and set a speed
Set speed (parentheses indicate standby mode)
Time interval while it is being set
Time interval after it has been set
Engaging the cruise control function
Before ACC can be used, it must first be put in standby mode.
To do so, press
. The symbol illuminates in the display and (---) indicate that ACC is in standby mode.
Setting a speed
Use the
or buttons to store (set) the vehicle's current speed. The set speed, for example 55 mph , is shown in
the display.
NOTE
Adaptive cruise control cannot be engaged at speeds below 20 mph (30 km/h).

The set speed, for example 55 mph, is then shown in parentheses. 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 ACC.
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 driver
ACC 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 deactivation
Adaptive cruise control is linked to other systems such as ABS, the stability and traction control system (DSTC) and
the Distance Alert system. If any of these systems are not functioning 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 driver must 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.
160 04 Comfort and driving pleasure
Adaptive Cruise Control-ACC
The radar sensor and its limitations
The radar sensor is used by both Adaptive Cruise Control and the Collision Warning System with Auto-brake (see
page 166
). It is designed to detect cars or larger vehicles driving in the same direction as your vehicle.
WARNING

Limitations
The Distance Alert function uses the same radar sensor used by Adaptive Cruise Control and the Collision Warning
system. See page 160
for more information on the radar sensor's limitations.
NOTE
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight
ahead may make the visual warning signal in the windshield difficult to see.
WARNING
Bad weather or winding roads may affect the radar sensor's capacity to detect vehicles ahead.
The size of the vehicle ahead, such as a motorcycle, may also make it difficult to detect. This may result in the
warning light illuminating at a shorter distance than the one that has been set, or that the light will not come on at all.
165 04 Comfort and driving pleasure
Distance Alert
Symbols and messages in the display
166 04 Comfort and driving pleasure
Collision Warning with Auto-brake (option)
Introduction
Collision Warning with Auto-brake is designed to assist the driver if there is a risk of a collision with the vehicle
ahead, if that vehicle is at a standstill or moving in the same direction as your vehicle. Auto-brake helps reduce the
collision speed.
Collision Warning consists of the following three functions:
1. Collision warning
The driver is warned of the imminent risk of a collision.

2. Brake support
This helps the driver brake efficiently in a critical situation.
3. Auto-brake
This function brakes the vehicle automatically if a collision cannot be avoided.
WARNING
The auto-brake function cannot prevent a collision but is instead intended to reduce speed at the moment of impact.
For full braking effect, the driver must apply the brakes.
WARNING
The collision warning system does not work in all driving situations, and traffic, weather and road conditions.
Warnings are only provided when the risk of collision is high. The Function section provides information about
limitations that the driver must be aware of before use.
Never wait for a collision warning. This system is designed to be a supplementary driving aid. It is not, however,
intended to replace the driver's attention and judgement. The driver is responsible for maintaining a safe distance and
speed, even when the collision warning system is in use.
Maintenance of the collision warning system components must only be performed by a trained and qualified
Volvo technician.
Function
Visual warning signal, collision risk
Radar sensor
Camera
Collision warning
The radar sensor and the camera work together to detect stationary vehicles and vehicles that are moving in the same
direction as your vehicle. If there is a risk of collision, the driver is alerted by a flashing red warning light and an
audible warning signal. Collision warning is active at speeds above 5 mph (7 km/h).
167 04 Comfort and driving pleasure
Collision Warning with Auto-brake (option)
Brake support
If the risk of collision continues to increase after the collision warning has been given, brake support is activated.

Checking settings
The current Collision Warning settings can be checked by going into the menu system at
168 04 Comfort and driving pleasure
Collision Warning with Auto-brake (option)
Car settings Collision warning settings. See page 122 for more information on the menu system.
Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead
may make the visual warning signal in the windshield difficult to see. For this reason, always activate the audible
warning signal in such conditions.
NOTE
The visual warning signal may be temporarily disengaged in the event of high passenger compartment temperature
due to strong sunlight, etc. If this occurs, the audible warning signal will be used, even if it has been deactivated in
the menu system.
Warnings may not appear if the distance to the vehicle ahead is very small or if steering wheel and pedal movements
are great, for example, due to a very active driving style.
WARNING
In certain situations, the system cannot provide warnings or warning may be delayed if traffic conditions or other
external factors make it impossible for the radar sensor or camera to detect the vehicle ahead.
Warnings may not be provided if the distance to the vehicle ahead is short, or if movements of the steering
wheel/brake pedal are great, such as during active driving.
The sensor system has a limited range for stationary or slow-moving vehicles and may therefore give delayed or
no warnings if your vehicle's speed is above approximately 45 mph (70 km/h).
Warnings for stationary or slow-moving vehicles may not be provided in dark conditions.
The Collision Warning system uses the same radar sensors as Adaptive Cruise Control. For more information on the
radar sensor and its limitations, see page 160
.
If no warning is given, or if a warning is delayed, Auto-brake will also not be provided or will be delayed.
NOTE
If warnings are given too frequently, the warning distance can be reduced (see "Setting a warning distance" on page
167). This causes the system to provide later warnings, which decreases the total number of warnings provided.
The camera's limitations
The camera is used by Collision Warning with Auto-brake, Driver Alert Control (see page 171
), and Lane Departure
Warning (see page 174
).
NOTE
Keep the section of the windshield in front of the camera clean and free of ice, snow, or condensation.