2002 LAND ROVER DISCOVERY clutch

ENGINE MANAGEMENT SYSTEM - V8
18-2-66 DESCRIPTION AND OPERATION
Operation - cruise control
Cruise control activation
Cruise control is a passive system. The driver must activate it. Switching on the cruise control master switch located
on the instrument panel activates cruise control. An LED in the switch illuminates, indicating cruise control is
available. The driver must accelerate the vehicle to the desired speed using the accelerator pedal. When the desired
speed is reached, pressing the SET+ switch activates cruise control. Cruise control will only activate if the following
conditions are met:
lVehicle speed is between 28 - 125 mph (45 - 200 km/h).
lThe brake pedal is not pressed.
lThe clutch pedal is not pressed (manual gearbox only).
lThe gearbox is not in park, reverse or neutral (automatic gearbox only).
Function
The cruise control ECU receives the set signal and determines the vehicle speed provided by the SLABS ECU. The
cruise control ECU activates the vacuum pump assembly to move the pneumatic actuator and the linkage to the
throttle disc to maintain set road speed. It does this by controlling the vacuum to the pneumatic actuator.
Cruise control cancellation
Cancelling cruise control enables the driver to regain control of the vehicle speed by using the accelerator pedal.
Cruise control is cancelled if any of the following conditions occur:
lThe brake pedal is pressed.
lThe RES switch button is pressed.
lThe clutch pedal is pressed (manual gearbox only).
lThe cruise control master switch is turned off.
lThe gearbox is placed in park, neutral, or reverse (automatic gearbox only).
Function
The cruise control ECU cancels cruise control operation by opening a vacuum control valve in the vacuum pump
assembly. This releases the throttle linkage from the control of the pneumatic actuator and returns it to the control of
the accelerator pedal.
The set speed will be stored in the cruise control ECU unless:
lThe cruise control master switch is turned off.
lThe ignition switch is turned off.
If cruise control is deactivated using either of the above methods, the set speed will be erased from the memory of
the cruise control ECU.
Cruise control resume
Cruise control can be resumed at the previously set speed, provided the set speed has not been erased from the
cruise control ECU memory as described above. To resume cruise control operation to the previously set speed,
depress the RES switch once when the following conditions are met:
lA set speed is stored in the cruise control ECU.
lVehicle speed is between 28 - 125 mph (45 - 200 km/h).
lThe brake pedal is not pressed.
lThe clutch pedal is not pressed (manual gearbox only).
lThe gearbox is not in park, reverse or neutral (automatic gearbox only).

ENGINE MANAGEMENT SYSTEM - V8
DESCRIPTION AND OPERATION 18-2-67
Function
The cruise control ECU activates the vacuum pump assembly to move the pneumatic actuator. This moves the
throttle to the set speed by adjusting the position of the throttle disc.
Accelerating while cruise control is active
There are three ways of increasing vehicle speed when cruise control is active:
lTemporarily increase vehicle speed (e.g. when overtaking another vehicle).
lIncrease vehicle set speed in 1 mph (1.5 km/h) increments.
lIncrease vehicle set speed.
To temporarily increase vehicle speed press the accelerator pedal until the desired speed is reached. When the
accelerator pedal is released, the vehicle coasts back to the set speed. When it reaches the set speed, cruise control
operation continues.
To increase the vehicle set speed in 1 mph (1.5 km/h) increments, tap the SET+ switch. Each tap on the switch
increases vehicle speed.
To increase the vehicle set speed, press and hold the SET+ switch until the desired set speed is reached.
The vehicle set speed will increase if the following conditions are met:
lThe vehicle is under cruise control operation.
lVehicle speed is between 28 - 125 mph (45 - 200 km/h).
lThe brake pedal is not pressed.
lThe clutch pedal is not pressed (manual gearbox only).
lThe gearbox is not in park, reverse or neutral (automatic gearbox only).
Function
The vehicle responds as follows:
lIf the driver accelerates using the accelerator pedal, vehicle speed increases overriding pneumatic actuator
position. When the driver releases the accelerator pedal, the vehicle returns to the set speed.
lIf the SET+ switch is tapped, the driver increases the stored speed and vehicle speed by 1 mph (1.5 km/h) per
tap on the switch.
lIf the driver presses and holds the SET+ switch, the vehicle speed increases until the SET+ switch is released.
This becomes the new set speed for the cruise control ECU.
Switching off cruise control
Switching off cruise control allows the driver to regain control of vehicle speed. It erases the set road speed from the
cruise control ECU memory.
To switch off cruise control, press the cruise control master switch to the off position.
Function
When the cruise control master switch is turned off, the cruise control ECU switches off power to the vacuum pump
assembly. The vacuum dump valve opens releasing the vacuum in the pneumatic actuator, returning the throttle disc
to driver control via the accelerator pedal.

ENGINE MANAGEMENT SYSTEM - V8
18-2-88 REPAIRS
Switch - clutch pedal - cruise control
$% 19.75.34
Remove
1.Remove 3 fasteners and move driver's side
lower closing panel aside.
2.Disconnect multiplug from clutch pedal switch.
3.Remove switch from pedal bracket.
Refit
1.Engage switch fully into pedal bracket location
and connect multiplug.
2.Position lower closing panel and secure with
fasteners.
ECU - Cruise control
$% 19.75.49
Remove
1.Remove fixings securing fascia RH closing
panel and remove panel.
2.Remove 2 fixings and remove 'A' post lower
trim.
3.Remove 2 nuts and remove ECU from studs.
4.Disconnect multiplug from ECU and remove
ECU.
Refit
1.Position new ECU and connect multiplug.
2.Fit ECU to studs and secure with nuts.
3.Fit lower trim panel to 'A' post and secure with
fixings.
4.Fit closing panel and secure with fixings.
5.Programme the ECU using TestBook.

CLUTCH - TD5
DESCRIPTION AND OPERATION 33-1-1
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CLUTCH - Td5 DESCRIPTION AND OPERAT ION

CLUTCH - TD5
33-1-2 DESCRIPTION AND OPERATION
Clutch components

CLUTCH - TD5
DESCRIPTION AND OPERATION 33-1-3
1Brake/clutch reservoir
2Connecting hose
3Bolt 2 off
4Master cylinder
5Clutch pedal
6Gearbox housing
7Primary driveshaft
8Bolt 2 off
9Slave cylinder
10Bleed nipple
11Pressure plate
12Drive plate
13Dual mass flywheel
14Metal hydraulic pipe
15Ball spigot
16Clutch release bearing sleeve
17Bolt 2 off
18Pivot washer
19Release lever
20Release bearing
21Retaining clip
22Bolt
23Plastic hydraulic pipe

CLUTCH - TD5
33-1-4 DESCRIPTION AND OPERATION
Hydraulic operation

CLUTCH - TD5
DESCRIPTION AND OPERATION 33-1-5
1Brake/clutch reservoir
2Fluid supply pipe
3Hydraulic feed pipe
4Damper
5Master cylinder
6Piston
7Clutch pedal
8Primary driveshaft
9Engine crankshaft
10Drive plate
11Dual mass flywheel
12Ring gear
13Leaf spring
14Cover - pressure plate
15Diaphragm
16Release bearing
17Ball spigot
18Release bearing sleeve
19Release lever
20Slave cylinder
21Piston
22Bleed nipple