Land Rover Discovery: Four-wheel Drive Systems - Vehicles With
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DRAINING
WARNING:
Make sure to support the vehicle with axle stands.
CAUTION:
Make sure the vehicle is on a flat level surface.
Raise and support the vehicle.
Remove the engine undershield.
Refer to:
COMPONENT LOCATION - VEHICLES WITH ACTIVE DRIVELINE
NOTE:
Automatic transmission shown, manual transmission similar
Power Transfer Unit (PTU)
Driveshaft
Rear Drive Unit (RDU)
Hydraulic lines
O
Breather and tube
Drive flange
Hydraulic pressure line from AWD valve block (P4)
Hydraulic pressure line from AWD valve block (P3)
Input shaft
Left cover
Casing
Engine mounting bracket
Rig
SEE MORE:
Active Driveline Hydraulic Circuit Diagram
Reservoir
Suction filter
Electric actuator
RDU pump
Pressure Control Valve (PCV) P1
PCV P2
PCV P3
PCV P4
PTU synchroniser piston
Bleed orifice
Left RDU clutch piston
Right RDU clutch piston
The Active Driveline system is controlled by the AW
WINDOW SWITCHES
Driver Door Switchpack
Passenger Door Switchpacks
Individual window switches are installed in each of the three passenger
doors. Window switches for all of the windows and a rear window isolation
switch are installed in the driver door switchpack in the top surface of the
door tr