Land Rover Discovery 99my To 03my Electrical Library 3rd Edition Rover Manual

DESCRIPTION AND OPERATION
4.20DISCOVERY SERIES II
Front sunroof tilt detection
The front sunroof motor is connected to pin C0784-8 on the sunroof ECU by an OU wire. An 
input to the sunroof ECU via this connection forms a sunroof tilt input to the sunroof ECU.
Front sunroof - open function
When the front sunroof switch is set to the open position, an earth path from pin C0784-2 to 
the front sunroof switch on a GK wire is completed. From the front sunroof switch the earth 
continues to earth header C0018...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.21
Rear sunroof operation - via front switch 1
Rear sunroof - open function - via front switch 1
When the rear 1 sunroof switch is set to the open position, an earth path from pin C0784-7 
of the sunroof ECU to the to sunroof switch is completed on a GU wire. From sunroof switch 
1 the earth continues via splice joints A14 and A15 to earth header C0018 on a B wire. The 
sunroof ECU logic circuit monitors the current flow from pin C0784-7. With this current...

DESCRIPTION AND OPERATION
4.22DISCOVERY SERIES II
Rear sunroof switch 2 - normal operation
Rear sunroof - open function - via switch 2
When the rear 2 sunroof switch is set to the open position, an earth path from pin C0784-6 
on a GW wire is completed via the closed contacts of the isolation switch, and on a B wire 
via splice joints A14 and A15 to earth header C0018. The sunroof ECU logic circuit monitors 
the current flow from pin C0784-6. With this current flow forming an open input the sunroof 
ECU...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.23
Ignition key modes
Depending on the vehicles specification:
The sunroof ECU controls operation of both sunroofs and will allow sunroof operation for a 
period of 44 seconds after the ignition switch is moved to the off position.
On some models if the time is less than 44 seconds and the drivers door (or any door on 
some models) is opened the sunroof ECU will disable the function of the sunroofs.
On some models the sunroof ECU will disable the sunroofs...

DESCRIPTION AND OPERATION
4.24DISCOVERY SERIES II
MIRRORS
DESCRIPTION
General
The door mirrors are electrically adjustable using a joystick operated mirror switch located 
on the fascia. The mirrors only operate with the ignition switch in position II.
The mirror switch can be rotated to select the left or right hand door mirror. A central position 
on the switch isolates the mirror operation. Movement of the switch in the vertical or 
horizontal positions moves the selected mirror glass accordingly. The...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.25
Vertical - Up
When the electric mirror switch is operated in the up position the feed from fuse 30 passes 
through the switch contacts and is connected to the mirror vertical adjustment motor. The 
wire connections are as follows:
zOn LHD vehicles, the connection from the switch is on a BK wire to the motor.
zOn RHD vehicles, the connection from the switch is on a BN wire to connector interface 
C0460-7/C0733-7. From the connector interface the...

DESCRIPTION AND OPERATION
4.26DISCOVERY SERIES II
Horizontal - right
When the electric mirror switch is operated in the right position the feed from fuse 30 passes 
through the switch contacts and is connected to the mirror horizontal adjustment motor. The 
wire connections are as follows:
zOn LHD vehicles, the connection from the switch is on a BU wire to the motor.
zOn RHD vehicles, the connection from the switch is on a BP wire to connector interface 
C0460-8/C0733-8. From the connector interface the...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.27
Horizontal - left
When the electric mirror switch is operated in the left position the feed from fuse 30 passes 
through the switch contacts and is connected to the mirror horizontal adjustment motor on 
an SW wire, via splice joint A9 and header joint C0285 LHD/C0292 RHD.
The earth path for the motor is as follows:
zOn LHD vehicles, the earth path is on a BU wire to connector interface C0733-8/
C0464-8. From the connector interface the earth is...

DESCRIPTION AND OPERATION
4.28DISCOVERY SERIES II
The heated rear screen relay coil is energised by the feed from fuse 13 in the engine 
compartment fusebox causing the relay contacts to close. With the contacts closed, a feed 
from fuse 8 in the passenger compartment fusebox passes through the relay and is 
connected from the fusebox on an NP wire to splice joints A19/A167. From the splice joints 
the feed is connected on NP wires to the driver and passenger door mirror heaters.
On LHD vehicles, the...

DESCRIPTION AND OPERATION
DISCOVERY SERIES II 4.29
FOLDING MIRRORS (JAPAN ONLY)
DESCRIPTION
Folding Mirrors (Japan only)
The door mirrors can be folded electrically to prevent damage using the joystick operated 
mirror switch located on the fascia. The mirrors only operate with the ignition switch in 
position II.
The central position on the switch is used for the folding mirrors function. The switch is 
moved vertically down to fold the mirrors in or out. A dedicated folding mirrors ECU is located...