2009 JAGUAR XF Brake

137
Transmission

AUTOMATIC TRANSMISSION
The transmission system is designed to
operate in two distinct modes, conventional
automatic and Jaguar Sequential Shift.
The automatic modes are accessed by the gear
selector:
•D - Drive - automatic shifting.
• S - Sport - sport automatic shifting.
The Jaguar Sequential Shift mode enables
sequential manual gear selection in D
(temporary) and S (permanent) modes, via the
steering wheel m ounted paddles.
Note: In addition to the st andard shift patterns
available in D and S, the transmission will
adapt to differing conditions by modifying shift
points, based upon vehicl e sensor information
for road gradient, cornering, braking pressure
and driving style.
JaguarDrive selector
The JaguarDrive selector elevates out of the
centre console when the engine is started, in
readiness for gear selection. Press the brake
pedal, then rotate the control to select the
chosen gear ( P, R , N or D) or, from D, press
down on the control and rotate to select S
(Sport).
CAUTIONS
Never select the Park ( P) position whilst
the vehicle is in motion. Doing so may
cause serious damage to the transmission.
Never select the Reverse ( R) position
whilst the vehicle is in forward motion.
Doing so may cause serious damage to the
transmission.
Never select a forward gear whilst the
vehicle is in rearward motion. Doing so
may cause serious damage to the
transmission.
Do not rev the engine or allow it to run
above normal idle speed while selecting
D or R, or while the vehicle is stationary with
any gear selected.
Do not allow the vehicle to remain
stationary for any length of time, with a
gear selected and the engine running. Always
select P or N if the engine is to idle for a
prolonged period.
E94119

Transmission
138

P should be selected before switching off the
engine. However, it is possible to switch the
engine off with R, D or S selected - the selector
will automatica lly select P, while retracting into
the centre console.
Note: If the engine is switched off with N
selected, the system will wait for 10 minutes
before selecting P. This procedure is to allow
the vehicle to be conveyed through a car wash
only and should not be used for vehicle
recovery purposes.
To prevent the transmission from
automatically selecting P (e.g. for vehicle
recovery purposes), it is necessary to activate
the Emergency Park Release.
See TRANSPORTING THE VEHICLE
(page 254).
Selector positions
P - Park: Use when parked. In this position the
transmission is locked, do not attempt to select
P if the vehicle is moving.
Note: P will be selected automatically when the
engine is switched off.
R - Reverse: Do not select if the vehicle is
moving forward.
N - Neutral: Disconnects drive to the wheels.
Use the parking brake when stopping
temporarily with N selected.
D - Drive: Gear changing is automatic for all six
forward gears. The shift points are determined
by accelerator pedal pos ition and road speed,
to provide the best ba lance of performance,
refinement and fuel economy, for the large
majority of driving conditions.
S - Sport: Gear changing is automatic for all six
forward gears, with modified gear shift points
to maximise the ve hicle response in
demanding driving condi tions. This mode is
not suitable for town or highway cruising. Note:
Both D and S positions also offer
additional features, wh ich are listed under
Automatic mode and Sport mode , later in this
section.
Stationary vehicle
When the vehicle is stationary, the selector
may be left in D or S, unless the vehicle is to be
parked. When stopping fo r extended periods,
either select P or apply the parking brake and
select N.
Selector interlock
The transmission is equippe d with an interlock,
to prevent inadvertent selection of a drive gear
(D , S or R) from the P or N positions. To
release the interlock to select a drive gear,
press the brake pedal while making the
selection.
Ensure the required driv ing range has selected
prior to releasing the brake pedal. The range
indicator ( R, D or S) on the selector and
message centre disp lays, will illuminate
continuously to confirm selection.
Note: If the brake pedal is released too early
during selector rotation from P or N to a driving
range ( R, D or S), then the selected range will
not be engaged. The selected range will flash
on the selector and message centre displays.
To obtain the selected range, press the brake
pedal, select P or N and reselect the required
range, ensuring the brake pedal is depressed.
If N is selected for less than 2 seconds (e.g.
when moving the selector between R and D),
the interlock will not ac tivate and the brake
pedal will not need to be pressed.
Note: The interlock is deactivated when the
vehicle is travelling at more than 5 km/h
(3 mph).

139
Transmission

If the selector fails to elevate
If the JaguarDrive selector is obstructed when
the engine is started, it may be prevented from
elevating out of the centre console. If this
occurs, turn off the ignition, ensure that the
selector is not obstruc ted and then start the
engine. The selector s hould elevate as normal.
If the selector still fails to elevate, even if there
is no obstruction, a faul t in the system is
indicated. The selector ca n still be used in the
lowered position, but be aware that it will not
automatically select P when the engine is
switched off, so P should be sele cted manually.
The fault should be re ctified by a Dealer/
Authorised Repairer at the earliest opportunity.
Starting
In the unlikely event that the selector did not
rotate back to P when the vehicle was
previously switched off, and the selector has
remained in R, D or S, it will not be possible to
start the engine. The vehicle will go to ignition
on. The selected range will flash and the
selector will now be unlocked, to allow the
driver to select P and start the engine.
Automatic mode
To select Drive (D) when the vehicle is
stationary:-
1. Apply the foot brake.
2. Rotate the gear selector to D.
When in D the transmission will automatically
select the most appropriate gear for the current
driving conditions.
Note: When a gear is selected the vehicle may
begin to move as soon as the foot brake is
released.
Kick-down
When D is selected and the accelerator pedal is
depressed fully, the transmission will
downshift to the lowest appropriate gear. Once
the accelerator pedal is returned to a normal
driving position, the tr ansmission will up-shift
to the highest appropriate gear.
Note: Kick-down operation will vary according
to road speed, current gear in use and
accelerator movement.
E94120

Brakes
144

PRINCIPLE OF OPERATION
Brake pads
Brake pads require a period of bedding in when
new. Drive with extra caution for the first
500 km (300 miles) to avoid the need for heavy
braking.
Brake pad wear warning
When the brake pads are wearing low, the
warning message BRAKE PADS LOW is
displayed in the message centre. Arrange for
your vehicle to be se en by your Dealer/
Authorised Repairer at the earliest opportunity.
Wet conditions
Driving through heavy ra in or water can have
an adverse effect on braking efficiency. Under
such circumstances, it is recommended that
you lightly a pply the brakes intermittently to
dry the brakes.
ABS warning indicator
If this amber warning indicator
illuminates while driving and/or
ABS FAULT is displayed in the
message centre, drive with extra caution, avoid
heavy braking where possible, and seek
qualified assistance as soon as possible.
If this red warning indicator
illuminates while driving and/or the
message LOW BRAKE FLUID is
displayed in the message centre, check the
brake fluid level at the earliest opportunity and
top-up as required. See BRAKE FLUID CHECK
(page 206).
HINTS ON DRIVING WITH ABS
ABS (Anti-Lock Braking System) allows
maximum brake pressure, and thus maximum
braking efficiency, to be applied, and prevents
the road wheels locking. This allows the driver
to retain steering control during heavy braking
under most road conditions.
ABS optimises tyre to road adhesion under
maximum braking conditions, though it cannot
provide increased cornering ability.
WARNINGS
Do not rest your foot on the brake
pedal whilst the vehicle is in motion.
This may cause a light application of
the brakes, which can result in overheating,
reduced brake performance, and excessive
brake wear.
Never allow the vehicle to coast
(freewheel) with the engine turned
off. The engine must be running to
provide full braking assistance. The brakes will
still function with the e ngine off, but far more
pressure will be required to operate them.
If the red brake warning indicator
illuminates, safely bring the vehicle to
a stop, as quickly as possible. Seek
qualified assistance before proceeding.
Never place non-approved floor
matting or any ot her obstructions
under the brake pedal. This restricts
pedal travel and braking efficiency.
WARNINGS
ABS cannot overcome the physical
limitations of braking distance. Nor
can it overcome the lack of grip on a
road surface (e.g. aquaplaning on water).
Braking distance is increased on a
slippery surface. This applies to all
vehicles, even those fitted with ABS.
The driver should not be tempted to
take risks when driving, in the hope
that ABS will correct errors of
judgement. In all cases it remains the driver's
responsibility to driv e with due care and
attention, payi ng particular attention to the
effects of speed, weather, road conditions etc.

145
Brakes

During emergency braking conditions ABS
constantly monitors the speed of each wheel.
ABS varies the brake pressure to individual
wheels, according to the grip available. The
constant alteration of brake pressure can be
felt as a pulsing sensation through the brake
pedal. This is not a caus e for concern, as it is
designed to demonstrate to the driver that ABS
is operating.
ABS braking techniques
For optimum ABS performance, these
instructions on braking techniques during ABS
operation should be followed:
• Do not release the brake pressure when
the pulsating effect is felt. Maintain a
constant pressure until the manoeuvre is
completed.
• To familiarise y ourself with the feel of the
brake pedal during ABS braking, practise
an emergency stop pr ocedure, always
making sure it is safe to do so. With the
seat belts fitted to all occupants, drive the
vehicle at 32 km/h (20 mph) and brake
sharply.
• ABS enables the driver to steer around
obstacles during em ergency braking.
However, the consequences of turning
sharply at high speed cannot be overcome
by the ABS.
• Do not attempt to pump the brakes to
avoid skidding, as this can interfere with
ABS operation. The ABS will not allow the
wheels to skid under normal road
conditions.
• The ABS will tend to keep the vehicle
straight during braki ng. Because braking
distances may increase under certain road
conditions, it is nece ssary to plan and
make turning manoeuvres as early as
possible.
Electronic Brakeforce Distribution (EBD)
EBD balances the distribution of braking forces
between the wheels on the front and rear axles,
to maintain maximum braking under all vehicle
loading conditions.
For example; Under light loads, EBD applies
less braking effort to the rear wheels, to
maintain stability. Conv ersely, it allows full
braking effort to the rear wheels when the
vehicle is towing or is heavily laden.
A fault with the EBD system is
indicated by illumination of the red
brake warning indicator and the
message EBD FAULT is displayed in the
message centre. Gently stop the vehicle, as
soon as safety permit s, and seek qualified
assistance.

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.

151
Parking aid

The front or rear warning tone will become
continuous when the obstacle is detected at or
within 300 mm (12 inches) from the vehicle.
Note: The outer front and rear sensors will
switch off if the distance to an object increases
or remains constant for 3 seconds. The
sensors will reactivate automatically if a new
object is detected with in the operating range,
or if the distance to the original object reduces.
Rear fitted accessories
Particular care must be taken when reversing
with rear fitted accessories e.g. bicycle carrier,
as the rear park assist will only indicate the
distance from the bumper to the obstacle.
Cleaning the sensors
Do not clean the sensors with abrasive or sharp
objects or materials.
For reliable operation, th e sensors in the front
and rear bumpers should be kept free from ice,
frost and grime.
When using a high pressure spray the sensors
should only be sprayed br iefly and not from a
distance of less than 200 mm (8 inches).
System fault
If the system has a fault when engaging reverse
gear or turning on the ignition, then a single,
three second tone will be heard (only once per
ignition cycle) and a pop-up warning will
appear on the touch-scre en. If both front and
rear parking aids are fitted, the warning
indicator in the parking aid switch will flash for
three seconds and then switch off, if a fault is
detected.
If a fault is detected, the system is
automatically disabled.
The parking aid may sound spurious tones if it
detects a frequency tone using the same band
as the sensors (e.g. air brakes).