Jaguar S-Type. Manual - part 26

111

Adaptive Cruise Control

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 Adaptive
Cruise Control.

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 center. 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.

Low speed automatic 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 center. The
driver must take control.

Overriding the set speed or follow
mode

WARNING:

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
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 center. 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.

Changing the gap

The gap from the vehicle ahead can be
decreased or increased by pressing the
rocker switch (4), see page 109, on the
steering wheel. Four gaps are available
and the selected gap setting will be
displayed on the message center when
either button is pressed. After the ignition
is switched ON the default gap will be
automatically selected ready for ACC
operation.

Note: It is the driver’s responsibility to
select a gap appropriate to the driving
conditions.

Adaptive Cruise Control

112

Changing the set speed

There are three ways to change the set
speed:
• Accelerate or brake to the required

speed and press the SET + button (2).

• Increase or decrease the speed by

pressing and holding either the SET +
or - button until the required set speed
is shown on the message center. The
vehicle speed will gradually change to
the selected speed.

• Increase or decrease the speed in

steps of 2 km/h (1 mph) by briefly
pressing the SET + or - button.

ACC operates between approximately 20
mph and 110 mph (34 km/h and 180
km/h) dependent on the country
specification.

Set speeds outside this 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 center until ACC is
cancelled.

ACC automatic switch off

Adaptive Cruise Control will disengage,
but not clear the memory when:
• The CANCEL button (3), see page

109, is pressed.

• The brake pedal is pressed.
• The vehicle speed falls below 30 km/h

(18 mph).

• Neutral, Park or Reverse gear

positions are selected.

• Dynamic Stability Control activates.

Adaptive Cruise Control will disengage,
and clear the memory when:
• The ignition switch is set to position 0.
• Maximum vehicle speed is reached.
• A fault occurs in the ACC system.

Resuming the set speed/follow mode

By pressing the RESUME button (1), see
page 109, 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
set speed will be displayed for four
seconds and the original set speed will be
resumed, unless a vehicle ahead causes
the follow mode to become active.

Caution: RESUME should only be used
if the driver is aware of the set speed
and intends to return to it.

113

Adaptive Cruise Control

FORWARD ALERT

Limited detection and warning of objects
ahead is provided during ACC operation,
by the ACC DRIVER INTERVENE
warning. The 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 issued. The brakes will
not be applied.

This additional feature may be switched
on or off using the forward alert switch in
the lower outboard knee bolster
switchpack.

When the indicator lamp in the switch is
on, forward alert is active.

The sensitivity of the warning may be
changed:
• Press the gap decrease button when

ACC is disengaged to display and
then decrease the sensitivity of the
alert.

• Press the gap increase button to

display and then increase the
sensitivity of the alert.

Both of these alerts are accompanied by
the FWD ALERT message

the message center.

DRIVING WITH ACC ACTIVE

The system acts by regulating the speed
of the vehicle using engine control and the
brakes. Gear changes may occur in
response to deceleration or acceleration
while 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 while the

system is active.

• That using maximum ACC braking

only is not sufficient.

• That the vehicle speed has decreased

below the minimum for ACC
operation.

Note:

•

Adaptive Cruise Control operates
when the gear selector lever is in
position 2, 3, 4, 5 or D.

•

When engaged, the accelerator pedal
rests in the raised position. Fully
release the pedal to allow normal ACC
operation.

•

When braking is applied by the ACC,
the vehicle brake lamps will be
switched on although the brake pedal
will not move.

Adaptive Cruise Control

114

DETECTION ISSUES

Detection issues can occur:
• When driving on a different line to the

vehicle in front (A).

• With vehicles which edge into your

lane which can only be detected once
they have moved fully into your lane
(B).

• There may be issues with the

detection of vehicles in front when
going into and coming out of a bend
(C).

In these cases ACC may brake late or
unexpectedly. The driver should stay alert
and intervene if necessary.

ACC FAILURE

If a fault occurs during operation of the
system in cruise or follow modes, the
ACC system will switch OFF and 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 failure 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 metal badges may also affect
ACC operation.

If this occurs in ACC cruise or follow
mode, the audible alarm sounds and the
message DRIVER INTERVENE appears
briefly. The message ACC SENSOR
BLOCKED is then displayed. The system
is no longer active.

Clearing the obstruction allows the
system to return to normal operation. If
the obstruction 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.

Tires other than those recommended may
have different sizes. This can affect the
correct operation of the ACC.

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