mode JAGUAR XF 2009 1.G Service Manual

Brakes
146

Emergency Brake Assist (EBA)
The EBA system measures the rate at which the
brake pressure increases. If the system detects
an emergency braking situation, EBA
automatically init iates full braking effect. This
can reduce stopping dist ances in critical
situations.
EBA stops operating as soon as the brake pedal
is released.
EBA is part of the Dynamic Stability
Control (DSC) system and a fault
with the EBA system is indicated by
the amber DSC warning indicator illuminating
and DSC NOT AVAILABLE (with amber
backlight) displaying in the message centre.
Seek qualified assistan ce as soon as possible.
Brake vacuum assist
(V6 petrol models only)
When the engine is cold and/or engine vacuum
is low, Brake vacuum assist provides additional
brake pedal assistance. When the function is
operating, a pulsation ma y be felt through the
brake pedal - this is not a cause for concern.
A fault is indicate d by the message BRAKE
ASSIST FAULT (with amber backlight)
appearing in the message centre. Increased
brake pedal effort may be required to slow the
vehicle when the engine is cold and/or engine
vacuum is low. Seek qualified assistance.
ELECTRIC PARKING BRAKE (EPB)
The switch which operate s the parking brake is
mounted on the centre c onsole to the rear of
the gear selector.
To engage the parking brake (1): Pull the
parking brake switch up wards and release. The
switch will return to the neutral position. The
Parking brake warning and Brake fluid low
warning indicator on the instrument panel will
illuminate.
The Drive Away Release feature allows the
parking brake to release automatically as the
vehicle is driven away.
To disengage the parking brake (2): With the
ignition system on or with the engine running,
apply the foot brake and press the parking
brake switch down.
If the parking brake is a pplied while the vehicle
is stationary and D or R is selected, applying
the throttle will auto matically release the
parking brake.
The parking brake is also automatically
released when the gear selector is moved from
the P position.
WARNING
The EBA system is an additional
safety system; it is not intended to
relieve the driver of his or her
responsibility for exercising due care and
attention when driving.12
E95148

147
Brakes

If the parking brake is inadvertently applied
when the vehicle is moving at above 3 km/h
(1.8 mph), PARK BRAKE APPLIED is displayed
in the message centre, the warning indicator in
the instrument panel will illuminate and a
warning chime will sound.
If the parking brake is a pplied whilst the vehicle
is moving, releasing the switch will disengage
the parking brake. The parking brake cannot be
applied when the vehicle is moving, if the
accelerator pedal is pressed.
Note: If the vehicle is in motion, the parking
brake should only be used as an emergency
brake.
The warning indicator in the instrument panel
will remain on for a short time, if the parking
brake is applied when the ignition system is
reverted to the convenience mode.
If a fault in the system is detected,
the amber brake warning indicator
will illuminate and PARK BRAKE
FAULT or CANNOT APPLY PARK BRAKE will
be displayed in the message centre. Seek
qualified assistance as soon as possible.
If the battery has been discharged or
disconnected, APPLY FOOT AND PARK BRAKE
will be displayed in the message centre when
the ignition is next switched on. Depress the
foot brake and pull the parking brake switch up
to apply the parking brake. This is required to
reset the parking brake system. The parking
brake will now function correctly.
CAUTION
Always apply the parking brake when
the vehicle is parked.

Parking aid
148

PRINCIPLE OF OPERATION
Note: Once the system has been activated by
selecting reverse or using the switch, the front
and rear sensors are active when the gear
selector is in neutral. Therefore, if an obstacle
is detected an audible warning tone will sound.
The parking aid is automatically in standby
when the ignition is on and provides the driver
with information on most obstructions, and
their distance from the vehicle, when
manoeuvring. This is ac hieved by using four
ultrasonic sensors on each bumper.
When objects are detected the Park aid will
emit a warning tone which increases in
frequency and then becomes constant, as the
vehicle gets closer to the object.
USING THE PARKING AID
Touch-screen
To set the volume of the parking aid warning
tones:
• Select Vehicle from the touch-screen
Home menu, then select Veh. settings.
• Select Parking , then select Vol. presets.
Touch the Parking aid + or - button to increase
or decrease the warning tone volume.
Note: This adjusts both front and rear speaker
volume.
WARNINGS
It remains the driver’s responsibility
to be vigilant when reversing. Small
children or animals may not be
detected by the system.
It remains the driver’s responsibility
to detect obstacles and estimate the
vehicle’s distance from them. Some
overhanging objects , barriers, thin
obstructions or painted surfaces which could
possibly cause damage to the vehicle may not
be detected by the system. Always be vigilant
when reversing.
CAUTIONS
Objects moving away from the vehicle
will be reported. Howe ver, whilst driving
away, object warning may be temporarily
reported due to ground reflection.
Systems using the same frequency
band as the front parking sensors, may
cause irregular tones to be emitted.
mirror dip
Vol. presetsOff
On
Vehicle
Security
ParkingReverse
12 : 26 pm
Navigat
Phone
Vehicle
Display set.
Preferences
Button audioParking aid
Vol. presets
AVC Low
MediumHigh
12 : 26 pm
Valet mode
E94137

Adaptive cruise control (ACC)
160

Setting the speed
Accelerate as normal until the required speed is
reached.
Rotate the speed adjustment control upwards
(+) to store the vehicle speed in the memory
and engage the system.
The set speed will be displayed on the message
centre (e.g. SETSPEED 80 KM/H (50 MPH) ).
Changing the speed
There are three ways to change the set speed:
•Accelerate or brake to the desired speed
then rotate the speed adjustment control
upwards ( +).
• Increase or decrease the speed by rotating
the speed adjustment control upwards ( +)
or downwards ( -), until the required set
speed is shown on the message centre.
The vehicle speed will gradually adjust to
the selected speed.
• Increase or decrease the speed in steps of
2 km/h (1 mph) by rotating the speed
adjustment control upwards (+) or
downwards ( -) briefly until the desired
speed is obtained.
ACC operates between approximately 30 km/h
and 180 km/h (18 mph and 112 mph)
dependent on the c ountry specification.
Set speeds outside th is range will not be
captured. The ACC may apply the brakes to slow down
the vehicle to the new set speed. The new set
speed will be displayed on the message centre
until ACC is cancelled.
Follow mode gap settings
Once a set speed has been selected, the driver
can release the accelerator and the set road
speed will be maintained.
When a vehicle ahead enters the same lane or
a slower vehicle is ahead in the same lane, the
vehicle speed will be adjusted automatically
until the gap to the vehicle ahead corresponds
to the default gap setting (gap level 3). The
vehicle is now in
follow mode.
The amber warning indicator in the
instrument panel will be
illuminated.
The message centre will display the gap set.
E97091
WARNING
When in follow mode, the vehicle will
not decelerate automatically to a stop,
nor will the vehicle always decelerate
quickly enough to avoid a collision, without
driver intervention.
E91497

161
Adaptive cruise control (ACC)

The vehicle will then maintain the constant time
gap to the vehicle ahead until:
•The vehicle ahead accelerates to a speed
above the set speed.
• The vehicle ahead moves out of lane or out
of view.
• A new gap distance is set.
If necessary, the vehicle brakes will be
automatically applied to slow the vehicle to
maintain the gap to the vehicle in front.
The maximum braking which is applied by the
ACC system is limited and can be overridden by
the driver applying the brakes, if required.
Note: Driver braking will cancel ACC.
If the ACC system predicts that its maximum
braking level will not be sufficient, then an
audible warning will sound while the ACC
continues to brake. DRIVER INTERVENE will be
displayed on the message centre. The driver
should take immediate action.
When in follow mode, the vehicle will
automatically return to the set speed when the
road ahead is clear, for instance when:
• The vehicle in front accelerates or changes
lane.
• The driver changes lane to either side or
enters an exit lane.
The driver should intervene if appropriate.
Changing the follow mode set gap
The gap from the vehicle ahead can be
decreased or increased by rolling the
thumbwheel on the stee ring wheel. Four gap
settings are available and the selected gap
setting will be displaye d on the message centre
when either ACC button is pressed. Each gap level is indicated by an
additional
chevron in front of th e vehicle icon in the
message centre (one chevron (gap level 1)
being the shortest, four chevrons (gap level 4)
being the longest). A fter the ignition is
switched on, the default gap (gap level 3) will
be automatically selected ready for ACC
operation.
Note: When the ignition is switched off, the
gap setting will revert to the default setting
(gap level 3) when switched on again.
Note: It is the driver’s responsibility to select a
gap appropriate to the driving conditions.
Overriding the speed and follow mode
The set speed and gap ca n be overridden by
pressing the accelerator pedal when cruising at
constant speed or in follow mode. If the vehicle
is in follow mode, the instrument warning
indicator will go out when the ACC is
overridden by the driver using the accelerator
and CRUISE OVERRIDE will be displayed on
the message centre. When the accelerator is
released the ACC functi on will operate again
and vehicle speed will decrease to the set
speed, or a lower spee d if follow mode is
active.
WARNING
Whenever the driver is overriding the
ACC by depressing the accelerator
pedal, the ACC will not automatically
apply the brakes to ma intain separation from
any vehicle ahead.

Adaptive cruise control (ACC)
162

Automatic low speed switch off
If the speed of the vehicle decreases below
30 km/h (18 mph), the ACC system will be
automatically switched off and the instrument
warning indicator will go out.
If the brakes were being applied by the ACC
system, they will be slowly released.
This will be accompanied by an audible
warning, and DRIVER INTERVENE will be
displayed on the message centre. The driver
must take control.
Automatic switch off
ACC will disengage, but not clear the memory
when;
• the CANCEL button ( 3) is pressed
• the brake pedal is pressed
• Neutral ( N), Park ( P) or Reverse ( R) gear
positions are selected
• Dynamic Stability Control activates.
ACC will disengage, and clear the memory
when;
• the ignition system is switched off
• maximum vehicle speed is reached
• a fault occurs in the ACC system.
Resuming the speed and follow mode
By pressing the RESUME button (4) after ACC
has been cancelled, for example, after braking,
the ACC will become active again provided that
the set speed memory has not been erased.
The original set speed will be resumed (unless
a vehicle ahead causes the follow mode to
become active) and the set speed will be
displayed in the message centre for four
seconds.
Hints on driving with ACC
The system acts by regulating the speed of the
vehicle using engine c ontrol and the brakes.
Gear changes may occur in response to
deceleration or acceleration whilst in ACC.
ACC is not a collision avoidance system.
However, during some situations the system
may provide the driver with an indication that
intervention is required.
An audible alarm will sound, accompanied by
the message DRIVER INTERVENE if the ACC
detects:
• A failure has occurred whilst the system is
active
• That using maximum ACC braking only is
not sufficient.
Note: ACC operates when the gear selector
lever is in position S or D.
Note: When engaged, the accelerator pedal
rests in the raised position. Fully release the
pedal to allow normal ACC operation.
Note: When braking is applied by the ACC, the
vehicle brake lamps will be switched on
although the brake pedal will not move.
CAUTION
RESUME should only be used if the
driver is aware of the set speed and
intends to return to it.

163
Adaptive cruise control (ACC)

Detection beam issues
Detection issues can occur:
1.When driving on a different line to the
vehicle in front.
2. When a vehicle edges into your lane. The
vehicle will only be detected once it has
moved fully into your lane.
3. There may be issues with the detection of
vehicles in front when going into and
coming out of a bend.
In these cases ACC may brake late or
unexpectedly. The driver should stay alert and
intervene if necessary.
ACC malfunction
If a malfunction occurs during operation of the
system in cruise or follow modes, the ACC
system will switch off a nd cannot be used until
the fault is cleared. The message DRIVER
INTERVENE appears briefly and is then
replaced by the message CRUISE NOT
AVAILABLE . If malfunction of the ACC or any
related system occurs at any other time, the
message CRUISE NOT AVAILABLE will be
displayed. It will not be possible to activate the
ACC system in any mode.
Accumulations of dirt, snow or ice on the
sensor or cover may inhibit ACC operation.
Fitting of a vehicle front protector or metallised
badges may also affect ACC operation.
The ACC system relies on its radar to detect
objects and constantly scans ahead. If the
radar detects no objects ahead in ACC or follow
mode , then the ACC will be deactivated, the
audible alarm sounds and the message
DRIVER INTERVENE displays briefly. The
message ACC SENSOR BLOCKED will then be
displayed.
The same messages may also be displayed
while driving on open roads with few objects
for the radar to detect.
Clearing the obstruction allows the system to
return to normal operation. If the obstruction is
present when ACC is inac tive, e.g. on initial
starting or with the ACC system switched off,
the message ACC SENSOR BLOCKED will be
displayed.
Tyres other than those recommended may
have different sizes. This can affect the correct
operation of the ACC.1
2
3
E91498

169
Driving dynamics

GENERAL INFORMATION
JaguarDrive Control
JaguarDrive Control is a selectable vehicle
optimisation system, designed to fine-tune the
driving characteristics of the vehicle by
accommodating different dr iving conditions or
driving styles.
The system allows the performance envelope
of the vehicle to be stretched and prevents the
necessity for a single, compromised
configuration for all conditions, thereby
increasing the vehicle's abilities.
The vehicle systems optimised by JaguarDrive
Control are:
• Engine management.
• Transmission management.
• Dynamic Stability Control and traction
control.
• Adaptive dynamics.
• Active Differential Control (E-diff) -
Supercharged vehicles only.
Note: Changing from one special mode to
another, will introduce noticeably different
vehicle responses. For example, the engine
revs produced by the accelerator position when
a special mode is not selected, may increase or
decrease when a mode is selected.
To familiarise y ourself with, and get the best
from, the JaguarDrive Control modes, you
should try out the mode s in circumstances
which are safe for you and other road users. 1.
Dynamic mode switch.
2. Winter mode switch.
3. DSC mode switch.
WINTER MODE
Press to operate. Designed for use
in slippery conditi ons, when active,
Winter mode selects 2nd gear for
driving away on level ground (no incline),
softens the responsiveness of the engine and
modifies the gear ch ange strategy. This
ensures that optimum traction is maintained.
Winter mode optim ises stability of the vehicle
to suit slippery conditions, when grip is
reduced. The vehicle perfor ms in a more gentle
and controlled manner, to avoid skidding,
allowing more confident progress under
adverse conditions.
Note: Winter mode cannot be active at the
same time as Dynamic mode. Winter mode will
remain selected indefinite ly after the ignition is
switched off, until deselected by the driver.
WARNING
It remains the driver's responsibility
to drive safely, according to the
prevailing conditions and within the
law.
JAG1654
1
2
3

Driving dynamics
170

DYNAMIC MODE
(V8 petrol and diesel vehicles only)
Press to operate. Dynamic mode
co-ordinates the vehicle's control
systems to deliver a high
performance driving experience. This setting
enhances key vehicle systems so that the
vehicle's full potential can be exploited. The
vehicle's responses are aimed at involving the
driver more in focused and purposeful driving,
helping swift progress.
Note: When the transmission is set to
permanent manual mode (i.e. using the
paddles to change gear while in Sport mode)
and Dynamic mode is selected, transmission
upshifts are fully controlled by the driver. This
means that the transmissi on will not change up
a gear automatically, even when the vehicle's
rev limit is reached. When the rev limit is
reached, the gear position indicator in the
message centre will glow amber, to indicate
that the next gear should be selected.
Note: Dynamic mode cannot be active at the
same time as Winter m ode. Dynamic mode will
remain selected for approximately six hours
after the ignition is swit ched off, after which
point it will need to be reselected if required.
STABILITY CONTROL
Dynamic Stability Control (DSC)
Dynamic Stability Contro l (DSC) is operational
whenever the engine is running, unless it has
been manually switched off. When the system
is operating, the warn ing indicator in the
instrument panel will flash.
The DSC system controls the Anti-lock Braking
System (ABS), traction control and yaw control
of the vehicle.
The DSC system assists the driver in retaining
directional control of th e vehicle in situations
where the vehicle is sliding (understeer or
oversteer). It must not encourage the driver to
drive beyond the limit of adhesion or at speeds
higher than those suitable for the prevailing
road and traffic conditions.
DSC applies braking pres sure to individual
wheels if excessive variation is detected. This
ensures that the vehicle follows the driver’s
intended direction of travel as closely as
possible.
Traction control will intervene to control wheel
spin by automatically reducing the power
output from the engine and applying braking to
individual wheels. This improves acceleration,
particularly on surfaces with uneven friction
(e.g. one wheel on ice with another on tarmac).
Note: For recommended DSC mode selection,
refer to the JaguarDri ve Control scenarios
section in this handbook.
WARNING
The fact that the vehicle is fitted with
DSC, must never allow the driver to
be tempted into taking risks which
could affect his or her sa fety or that of other
road users. In all cases, it remains the driver’s
responsibility to drive sa fely according to the
prevailing conditions.

171
Driving dynamics

TracDSC
TracDSC is an alternative setting of DSC with
reduced system interventions. With TracDSC
engaged, traction may be somewhat increased,
although stability may be reduced compared to
normal DSC. TracDSC is intended for use only
on dry tarmac, by suitably experienced drivers
and should not be select ed for other surfaces
or by drivers with insufficient skill and training
to operate the vehicle safely with the TracDSC
function engaged.
The less restrictive TracDSC setting may be
preferred, for example, by expert drivers
engaged in high performance driving on dry
Tarmac surfaces such as tracks and circuits.
Switching between DSC and Trac DSC
• Press and hold the DSC switch for less
than 10 seconds.
• The message centre will temporarily
display either Trac DSC or DSC ON.
• The warning indicator in the instrument
panel will illuminate while Trac DSC is
selected.
• The warning indicator will flash when DSC
or Trac DSC is active.
Note: If cruise control is engaged, it will
automatically disengage if stability control
activates.
Switching between DSC OFF and ON
Switching DSC OFF
• Press and hold the DSC switch for more
than 10 seconds.
• The message centre will display DSC OFF
and a short warning chime will sound.
• The warning indicator in the instrument
panel will illuminate.
Switching DSC ON
If DSC is OFF:
• Press and release the DSC switch.
• The DSC system will switch on, the
message centre will temporarily display
DSC ON .
• The warning indicator in the instrument
panel will be extinguished.
Note: Switching the engine off and then on
again, will always revert DSC status to DSC ON,
regardless of which Ja guarDrive Control mode
is selected.
WARNING
Vehicle safety may be reduced by
inappropriate use of TracDSC.
TracDSC should only be used in
suitable conditions.
E95149