Jaguar XJ (X350). Manual — part 1169

5

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Brake pedal position switch and speed control deactivation switch

6

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Adaptive speed control module - vehicles with adaptive speed control

System operation

The speed control system is inoperative below 43 kph (27 mile/h) and inoperative above the

following speeds:

193 kph (120 mile/h) for vehicles fitted with a 3.0L engine.

201 kph (125 mile/h) for all other variants.

The speed control system is designed to maintain a selected vehicle speed between these two

parameters.

Any of the switches operated by the brake will interrupt the speed control operation by switching the

signal to the engine control module (ECM). This will allow the system to go into STANDBY mode.

Pressing the RESUME switch with the vehicle travelling above 43 kph (27 mile/h) while the system is

in STANDBY mode will allow the vehicle to accelerate until the last set speed is resumed.

Steering Wheel Switches

RESUME Switch

When the RESUME switch is pressed with the vehicle travelling above 43 kph (27 mile/h) with the

system in STANDBY mode, the vehicle is allowed to accelerate until the last set speed is resumed.

The RESUME switch will not function if the ignition switch has been cycled or if the vehicle speed is

below 43 kph (27 mile/h).

CANCEL Switch

When the CANCEL switch is pressed with the vehicle travelling above 43 kph (27 mile/h) the system

will enter STANDBY mode.

SET Switch

When the SET +/- switch is pressed with the vehicle travelling above 43 kph (27 mile/h) the system

allows the vehicle speed to be maintained to ± 1.62 kph (1 mile/h). Pressing the SET +/- switch will

increase or decrease the vehicle speed respectively until the switch is released. If the respective

switch is pressed momentarily, the speed will accelerate or decelerate in 1.62 kph (1 mile/h)

increments.

Brake Pedal Position (BPP) Switch

If the brake pedal is activated while the speed control system is active, the ECM receives a signal

from the brake pedal position switch. This will cancel speed control and allow the throttle blade to

return to the position as demanded by the accelerator pedal.

Speed Control Deactivation Switch (brake).

If the brake pedal is activated while the speed control system is active, the ECM receives a signal

from the speed control deactivation switch. This will cancel speed control and allow the throttle

blade to return to the position as demanded by the accelerator pedal.

Adaptive speed control

On vehicles for certain markets, an adaptive speed control system is installed as an option. In

addition to the normal vehicle speed control functions, this system enables a preset distance to be

maintained behind a moving vehicle immediately ahead, without driver intervention.

Automatic Switch Off - Vehicles with Adaptive Speed Control

The adaptive speed control will disengage, but not clear the memory when:

the CANCEL button is activated.

the brake pedal is applied.

the vehicle speed falls below 26Km/h (16mph).

neutral, park or reverse gear positions are selected.

traction control is activated.

The adaptive speed control will disengage, and clear the memory when:

the ignition switch is set to position '0'.

maximum vehicle speed is reached.

the parkbrake is applied.

a fault occurs in the adaptive speed control system.

Forward Alert Switch - Vehicles with Adaptive Speed Control

Forward Alert

The forward alert system is switched on and off by the forward alert switch, which is incorporated in

to the message center switch. The forward alert system additionally provides warnings while the

adaptive speed control is not activated.

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Speed Control Module - Vehicles with Adaptive Speed Control

The adaptive speed control module incorporates a radar sensor and yaw rate sensor to provide

system control functions.

Adaptive Speed Control Failure

If a fault occurs during any adaptive speed control operation the adaptive speed control system will

be deactivated and will remain in this state until the fault is rectified. The message center will display

'CRUISE NOT AVAILABLE'.

Speed Control - VIN Range: G45704-
>G99999

Item

Part Number

Description

1

—

Engine control module (ECM)

2

—

Speed control steering wheel switches

3

—

Message center

4

—

Speed control module - vehicles with adaptive speed control

5

—

Forward alert switch - vehicles with adaptive speed control

6

—

Brake pedal position switch and speed control deactivation switch

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