2011 JAGUAR XF brake

L
(FM8) SEMCON JLR OWNER GUIDE VER 1.00 EURO
LANGUAGE: english-en; MARQUE: jaguar; MODEL: XF
Cruise control
94
Cruise controlUSING CRUISE CONTROL
The cruise (speed) contro l system can be used
by the driver to maintain a selected vehicle
speed above 30 km/h (18 mph).
1. SET (+ / - ) : Roll upwards to engage cruise
control. Roll up or down to increase or
decrease the set cruising speed.
2. CANCEL : Press to disengage cruise
control. The set sp eed memory will be
retained.
3. RESUME : Resumes the cruise control set
speed after it has been disengaged.
SETTING VEHICLE SPEED
Only use cruise control when
conditions are favourable (e.g.
straight, dry, open roads with light
traffic).
In certain conditions, such as a steep
downhill gradient, the vehicle speed
may exceed the set cruising speed.
This is because eng ine braking is
unable to maintain or reduce the
vehicle speed. Driver intervention
may be required.
When you are travelling at the speed you
require press the set button.
Cruise control will enga ge and maintain the set
speed and you can remove your foot from the
accelerator pedal. Note:
Cruise control w ill automatically
disengage when the brake pedal is pressed or
when the vehicle speed falls below 30 km/h
(18 mph).
CHANGING THE CRUISE SPEED
There are two ways to change the set speed:
• Accelerate or decele rate to the desired
speed then roll the SET control upwards.
• Increase or decrease the speed by rolling
the SET control up or down until the
desired speed is obtained.
Note: The set speed can be increased or
decreased in steps of 2 km/h (1 mph), by
rolling the SET control up or down briefly until
the desired spee d is obtained.
RESUMING THE SET SPEED
If the vehicle is accelerated above the set
speed, then the set speed will be resumed
when the accelerator pedal is released.
If the CANCEL button ( 2) or the brake pedal is
pressed, the cruise cont rol will disengage but
the set speed memory will be retained. Press
RESUME (3) and the vehicle will return to the
set speed.
Note: Cruise control will not resume at speeds
below 30 km/h (18 mph).
RESUME should only be used if the
driver is aware of the set speed and
intends to return to it.
It is not recomme nded to resume set
speed when a low gear is selected as
excessive engine speeds will occur.

R
(FM8) SEMCON JLR OWNER GUIDE VER 1.00 EURO
LANGUAGE: english-en; MARQUE: jaguar; MODEL: XF
Cruise control
95
AUTOMATIC SWITCH OFF
Cruise control will swit ch off but the set speed
will remain in the memory when:
• The CANCEL button ( 2) is pressed.
• The brake pedal is pressed.
• Speed falls below 30 km/h (18 mph).
• Neutral, Park or Reverse gear is selected.
• Dynamic Stability C ontrol is operating.
• The difference between the actual and set
speed is too great.
• When the vehicle reaches a maximum
speed of 192 km/h (120 mph).
• The accelerator pedal is used to accelerate
beyond the set speed for too long a period.
Cruise control will switch off and clear the
memory when:
• The ignition system is switched off.
• A fault occurs. The cr uise control system
will switch off and cannot be used until the
fault is cleared.

L
(FM8) SEMCON JLR OWNER GUIDE VER 1.00 EURO
LANGUAGE: english-en; MARQUE: jaguar; MODEL: XF
Adaptive cruise control
96
Adaptive cruise controlADAPTIVE CRUISE CONTROL
OVERVIEW
The Adaptive Cruise Control (ACC) system is
designed to aid the driver to maintain a gap
from the vehicle ahead or a set road speed if
there is no slower vehicle ahead. ACC is
available at vehicle sp eeds of 32 to 180 km/h
(20 to 112 mph).
ACC is not a collision warning or
avoidance system. Additionally, ACC
will not react to:
• Stationary or slow moving vehicles below
10 km/h (6 mph).
• Pedestrians or objec ts in the roadway.
• Oncoming vehicles in the same lane.
The ACC system uses a radar sensor, which
projects a beam directly forward of the vehicle
to detect objects ahead.
The radar sensor is mounted in the centre of
the lower bumper, to provide a clear view
forward for the radar beam.
• Only use ACC when conditions are
favourable (i.e. main roads with free
flowing traffic).
• Do not use in poor visibility, specifically
fog, heavy rain, spray or snow.
• Do not use on icy or slippery roads.
• It is the drivers respons ibility to stay alert,
drive safely and be in control of the vehicle
at all times.
• Keep the area in front of the radar sensor
free from dirt, meta l badges or objects,
including vehicle front protectors, which
may prevent the sensor from operating.
• Do not use ACC when entering or leaving a
motorway.
USING ACC
1. SET: Roll the thumbwheel upward or
downwards to increase or decrease speed,
until the desired speed is achieved.
2. Gap increase or decrease control. Four
settings are selectable by rolling the
thumbwheel. See 98, CHANGING THE
FOLLOW MODE SET GAP .
3. CANCEL: Cancels but retains the set speed in memory.
4. RESUME : Resumes the ACC set speed
after it has been disengaged.
The system is operated by controls mounted
on the steering wheel. The driver can also
intervene at any time by use of the brake or
accelerator pedals.
Setting the vehicle speed, activating, and
deactivating ACC is done in the same way as
using cruise control.

R
(FM8) SEMCON JLR OWNER GUIDE VER 1.00 EURO
LANGUAGE: english-en; MARQUE: jaguar; MODEL: XF
Adaptive cruise control
97
ENTERING FOLLOW MODE
When in follow mode, the vehicle will
not decelerate automat ically to a stop,
nor will the vehicl e always decelerate
quickly enough to av oid a collision.
Note: Follow mode cannot be disengaged
independently from the speed maintenance
aspect of cruise control.
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 message centre will display the gap set. 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 a nd 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.
The amber warning lamp in the
instrument panel will be
illuminated.

L
(FM8) SEMCON JLR OWNER GUIDE VER 1.00 EURO
LANGUAGE: english-en; MARQUE: jaguar; MODEL: XF
Adaptive cruise control
98
CHANGING THE FOLLOW MODE SET
GAP
Four gap settings are available and the selected
gap setting will be displayed on the message
centre when the gap adjustment control is
operated.
Each gap level is indi cated by an additional
chevron in front of the vehicle icon in the
message centre (one chevron (gap level 1)
being the shortest, four chevrons (gap level 4)
being the longest).
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 res ponsibility to select a
gap appropriate to the driving conditions.
OVERRIDING THE SPEED AND
FOLLOW MODE
Whenever the driver is overriding the
ACC by depressing the accelerator
pedal, the ACC will not automatically
apply the brakes to maintain
separation from any vehicle ahead.
The set speed and gap can be overridden by
pressing the accelerator pedal when cruising at
constant speed or in follow mode. If the vehicle
is in follow mode, the warning lamp 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 function will
operate again and vehicle speed will decrease
to the set speed, or a lower speed if follow
mode is active.
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 warning
lamp will go out.
If the brakes were bei ng 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.
ACC AUTO OFF
ACC will disengage, but not clear the memory
when:
• The CANCEL button is pressed
• The brake pedal is pressed
• Neutral ( N), Park (P ) or Reverse ( R) gear is
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.

R
(FM8) SEMCON JLR OWNER GUIDE VER 1.00 EURO
LANGUAGE: english-en; MARQUE: jaguar; MODEL: XF
Adaptive cruise control
99
RESUMING THE SPEED AND
FOLLOW MODE
RESUME should only be used if the
driver is aware of the set speed and
intends to return to it.
By pressing the RESUME button 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 accele ration 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.
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.

L
(FM8) SEMCON JLR OWNER GUIDE VER 1.00 EURO
LANGUAGE: english-en; MARQUE: jaguar; MODEL: XF
Adaptive cruise control
100
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 is unable to detect any objects ahead,
then 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 ro ads with few objects
for the radar to detect.
Clearing the obstruction fr om in front of the
sensor allows the system to return to normal
operation. If the obstr uction is present when
ACC is inactive (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 for your
vehicle, may have different sizes. This can
affect the correct operation of the ACC.
FORWARD ALERT FUNCTION
Limited detect ion and warning of objects
ahead, is provided duri ng ACC operation by the
ACC Forward Alert warning. The enhanced
forward alert feature additionally provides
warnings when ACC is not engaged; if an object
is detected close ahead, then the warning tone
and message will be issu ed. The brakes will not
be applied.
The forward alert system does not initiate any
action. The driver must take appropriate action
when the Forward Alert message is displayed.
However, the system monitors driver actions
(e.g. braking, steering or indicating) and may
not initiate the warning display if the
appropriate action has been taken early
enough.
Press the button to switch Forward alert on or
off.
When the warning lamp in the
instrument panel is on, Forward
alert is active.

R
(FM8) SEMCON JLR OWNER GUIDE VER 1.00 EURO
LANGUAGE: english-en; MARQUE: jaguar; MODEL: XF
Adaptive cruise control
101
The sensitivity of th e warning can only be
adjusted with ACC disengaged. Adjust as
follows:
• Roll the gap adjustment control
downwards to decrease the sensitivity of
the alert.
• Roll the gap adjustment control upwards to
increase the sensitivity of the alert.
Note: The forward alert set gap is retained
when the ignition is switched off.
Forward Alert is displayed in the message
centre.ADVANCED EMERGENCY BRAKE
ASSIST
The system may not react to slow
moving vehicles and will not react to
stationary vehicles or vehicles
travelling in the opposite direction.
Warnings may not appear if the
distance to the vehicle ahead is very
small or if steering wheel or pedal
movements are large (e.g. to avoid a
collision).
The system utilises the same radar
sensor as ACC and Forward alert - the
same limitations of performance
apply.
Advanced emergency brake assist is available
at speeds above approximately 7 km/h (5 mph)
and improves brakin g response during
emergency braking, when a moving vehicle is
detected close ahead.
If the risk of collision increases after the
Forward Alert warning is displayed, advanced
emergency brake assist is activated. The
brakes are automatically applied gently in
preparation for rapid braking (this may be
noticeable). If the brake pedal is then pressed
quickly, full braking is implemented, even if
only light pressure is ap plied to the pedal. See
87, EMERGENCY BRAKE ASSIST (EBA) .
Note: Braking performance will only be
improved if the driver applies the brakes.
Advanced emergency brake assist will function
even if Forward Alert and ACC are switched off.
If there is a fault with the system, Forward
Alert Unavailable is displayed in the message
centre. The vehicle can st ill be driven and the
braking system will still operate, but without
advanced emergency brake assistance. Seek
qualified assistance to have the fault rectified.