Discovery electrical Manual — part 66
COOLING FANS (300TDI WITHOUT EDC)
K5
10
CIRCUIT DIAGRAM
30
F 3
30 A
[1]
B
M
M
A
P125
Engine Compart-
ment Fuse Box
GW
S209
1
C116
85
30
C292
85
86
30
87
86
87
C292
BN
See Fuse Details
K109
Condenser Fan
Relay
BP
1
17
5
C217
C216
Not used
S123
Not used
Z209
Condenser Fan
Control Diode 1
PB
BP
1
C146
X113
Condenser Fan
Coolant Tem-
perature Switch
[1]
< 94
C
(201
F)
[2]
> 100
C
(212
F)
[2]
2
C146
B
1
C182
1
C183
2
C182
2
C183
B
B
See Ground Dis-
tribution
S122
E200
B
M121
Right Con-
denser Fan
Motor
M113
Left Condenser
Fan Motor
B
300Tdi without
EDC
S229
NG
K5-12
K5-4
See Ground Dis-
tribution
S155
E100
COOLING FANS (300TDI WITH EDC)
K5
11
CIRCUIT DIAGRAM
30
F 3
30 A
E100
[1]
B
M
M
A
P125
Engine Compart-
ment Fuse Box
GW
S209
1
C116
85
30
C292
85
86
30
87
86
87
C292
BN
See Fuse Details
K109
Condenser Fan
Relay
BP
1
17
5
C217
C216
Not used
S123
Not used
Z209
Condenser Fan
Control Diode 1
PB
BP
1
C146
X113
Condenser Fan
Coolant Tem-
perature Switch
[1]
< 94
C
(201
F)
[2]
> 100
C
(212
F)
[2]
2
C146
B
See Ground Dis-
tribution
1
C182
1
C183
2
C182
2
C183
B
B
See Ground Dis-
tribution
S122
E200
B
M121
Right Con-
denser Fan
Motor
M113
Left Condenser
Fan Motor
B
300Tdi with EDC
S229
NG
K5-12
K5-4
COOLING FANS
K5
12
CIRCUIT DIAGRAM
0
S244
YB
Z210
Condenser Fan
Control Diode 2
PB
MFI–V8
300Tdi with-
out EDC
300Tdi with EDC
PB
4
5
2
C2025
X225
Front A/C Switch
Compressor
Controls
Interior Lamps
Compressor
Controls
UR
LG
1
3
C2025
WB
E200
See Ground Dis-
tribution
S2056
Blower Controls
N
5
C2022
X247
Front Fan Speed
Switch
1
C2022
E200
See Ground Dis-
tribution
0
I
IV
III
II
4
C2073
NW
[1]
N
2
C2067
2
C2027
K5-11
K5-10
K5-6
NAS
MFI–V8
300Tdi without
EDC
300Tdi with EDC
PB
S2071
2
C217
Not used
PB
K5-9
B
MFI–T16
13
C1027
2
C217
1
C2067
NW
SFI–V8
B
CIRCUIT OPERATION
Voltage for window lift and sunroof operation is
provided to the Window Lift ECU (Z147) from fuses
F1 and F2. The Window Lift ECU is grounded
through the B wire at ground E200.
Timeout Feature
Fuse F15 applies voltage to the Window Lift ECU
terminal 3 when the ignition switch is on. When the
ignition switch is turned off, the absence of voltage at
terminal 3 signals the Window Lift ECU to start the
timeout feature. When the timeout feature is
activated, the Window Lift ECU will allow window and
sunroof operation for an additional 45 seconds.
For NAS vehicles only:
The timeout feature will be cancelled if the driver’
s
door is opened and then closed. The Window Lift
ECU monitors the door’
s position at terminal 9.
Front Window Operation
When a Front Window Switch is operated, the switch
grounds one of four Window Lift ECU input terminals.
This signals the Window Lift ECU to apply voltage
and ground to the respective window motor. If the
front window switch is held in the down position for
more than 1/2 second, the express down feature is
activated. The Window Lift ECU will operate the
window motor until it is completely lowered.
Rear Window
The Window Lift ECU terminal 4 supplies voltage to
the Rear Window Console and door switches for rear
window operation.
When a window console switch is in the ‘
DOWN’
position, voltage is applied to the window motor
through the ‘
up’
switch contacts. The window motors
operate because they are grounded through the
‘
down’
contacts of the window console switch. When
a switch is in the ‘
UP’
position, the polarity applied to
the window motor is reversed, causing the motor to
run in the opposite direction and the window to close.
Rear Window Isolation Switch (X187)
The Rear Window Isolation Switch (X187) is placed
in series with the ground supply to the Rear Window
Door Switches (X188,X189). If the isolation switch is
opened, the ground supply is interrupted, preventing
rear window operation using the rear door switches .
CIRCUIT OPERATION
1
POWER WINDOWS
L1
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