start stop button VOLVO XC70 2009 Owner´s Manual

04 Comfort and driving pleasure
Stability system
04``155 Introduction
The Dynamic Stability and Traction Control
system (DSTC) consists of a number of func-
tions designed help reduce wheel spin, coun-
teract skidding, and to generally help improve
directional stability.
CAUTION
A pulsating sound will be audible when the
system is actively operating and is normal.Traction control (TC)This function is designed to help reduce wheel
spin by transferring power from a drive wheel
that begins to lose traction to the wheel on the
opposite side of the vehicle (on the same axle).
TC is most active at low speeds.
This is one of DSTC's permanent functions and
cannot be switched off.Active Yaw Control (AYC)This function helps maintain directional stabil-
ity, for example when cornering, by braking
one or more of the wheels if the vehicle shows
a tendency to skid or slide laterally.
This is one of DSTC's permanent functions and
cannot be switched off.
Spin control (SC)The spin control function is designed to help
prevent the drive wheels from spinning while
the vehicle is accelerating.
Under certain circumstances, such as when
driving with snow chains, or driving in deep
snow or loose sand, it may be advisable to
temporarily switch off this function for maxi-
mum tractive force.
WARNING
The car's handling and stability characteris-
tics will be altered if the spin control function
has been disabled.Operation
G021409
Temporarily switching off Spin control1.
Turn the thumbwheel
until the
DSTC
menu is shown.
2.
Hold down the RESET button
to toggle
between
DSTC SPIN CONTROL ON or
OFF
.
Messages in the information displayDSTC Temporarily OFF
– system function
has been temporarily reduced due to high
brake disc temperature. The function is acti-
vated automatically when the brakes have
cooled.
DSTC Service required
– the system has
been disabled due to a fault. If this occurs:
1. Stop the vehicle in a safe place and turn off
the engine.
2. Restart the engine.
If the message remains when the engine is
restarted, drive to an authorized Volvo work-
shop to have the system inspected.
Symbols in the instrument panelIf the symbols
and
are dis-
played at the same time, read the message in
the information display.

06 Maintenance and specifications
Replacing bulbs
06``225
CAUTION
Never touch the glass of bulbs with your fin-
gers. Grease and oils from your fingers
vaporize in the heat and will leave a deposit
on the reflector, which will damage it.
NOTE
•
Always switch off the ignition before
starting to replace a bulb.
•
The optional active Bi-XenonŸ head-
light bulbs contain trace amounts of
mercury. These bulbs should always be
disposed of by a trained and qualified
Volvo service technician.
Removing the headlight housing1. Switch off the ignition by pressing quickly
on the START/STOP ENGINE button and
remove the remote key from the ignition
slot
1.
2. (Upper illustration under "Headlight hous-
ing") Withdraw the headlight housing's lock-
ing pins. Pull the headlight housing straight out .
CAUTION
When disconnecting the connector, pull on
the connector itself and not on the wiring.3. (Lower illustration under "Headlight hous-
ing")
Unplug the wiring connector by holding
down the clip with your thumb. Pull out the connector with the other
hand.
4. Lift out the housing and place it on a soft
surface to avoid scratching the lens.
5. Replace the defective bulb(s), see
page 230.
Reinserting the headlight housing1. Plug in the connector until it clicks into
place.
2. Reinstall the headlight housing and locking
pins. Check that they are correctly
inserted. The headlight housing must be
properly inserted and secured in place
before the lighting is switched on or the
remote key is inserted into the ignition slot.
3. Check that the lights function properly.
Removing the cover to access the
headlights and parking lights
G021745
NOTE
Before starting to replace a bulb, see
page 224.1. Open the retaining clamp by pressing it to
the side.
2. Press down the clips on the upper edge of
the cover and remove it.
Reinstall the cover in the reverse order.
1Does not apply to vehicles with the optional keyless drive.

06 Maintenance and specifications
Fuses
06``241
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
Tailgate wiper
15
Remote key receiver, Alarm
sensors
5
Fuel pump
20
Electric steering column lock
20
–Lock, tank/tailgate
10
Alarm siren. ECC
5
START/STOP ENGINE button
5
Brake light switch
5