Discovery electrical Manual — part 12
SEQUENTIAL MULTIPORT FUEL INJECTION (SFI–V8) (NAS ONLY)
A3
10
CIRCUIT DIAGRAM
NAS
F 1
30 A
P114
Heated Front
Screen Fuse
Block
10
C1027
21
Z132
Engine Control
Module (ECM)
Z108
Anti–Lock Brake
System ECU
29
C2084
1
8
YK
C1017
S2074
Heated Front
Screen
C1017
C1026
3
26
C1026
Z163
Theft Alarm Unit
15
C225
B
S2126
HJ13
K121
Heated Front
Screen Relay
PS
PO
30
MF 1
100 A
1
C294
3
C294
1
C118
OS
60 A
P139
Heated Front
Screen In–Line
Maxi–Fuse
P125
Engine Compart-
ment Fuse Box
N
30
87
SEQUENTIAL MULTIPORT FUEL INJECTION (SFI–V8) (NAS ONLY)
A3
11
CIRCUIT DIAGRAM
[2]
YB
7
C1027
9
C2073
G
L
1
C2076
Z132
Engine Control
Module (ECM)
X101
Front A/C Evapor-
ator Temperature
Switch
[1]
> 0
C (32
F)
[2]
< 0
C (32
F)
1
C2077
8
C2073
ON
[1]
28
C1017
YB
1
C181
X102
A/C Dual Pres-
sure Switch
[1]
> 32 Bar
(455 psi)
[2]
< 2.07 Bar
(30 psi)
2
C181
[1]
[2]
PB
0
X225
Front A/C Switch
[1]
1
C2025
4
C2025
5
C2022
2
C2067
N
Blower Controls
S2056
See Ground Dis-
tribution
E200
1
C2022
0
I
II
III
IV
X247
Front Fan Speed
Switch
N
2
C2027
29
1
C2067
NW
NW
4
C2073
PB
13
S2071
With Air Condi-
tioning only
With Air Condi-
tioning only
PB
NAS
SEQUENTIAL MULTIPORT FUEL INJECTION (SFI–V8) (NAS ONLY)
A3
12
CIRCUIT DIAGRAM
30
F 3
30 A
9
C1027
S229
30
Compressor Con-
trols
With Air Condi-
tioning only
K108
Compressor
Clutch Relay
1
C116
NG
85
C241
86
C241
30
87
87
86
85
WG
BG
BS
Compressor Con-
trols
1
Z132
Engine Control
Module (ECM)
5
C1026
30
K109
Condenser Fan
Relay
86
C292
85
C292
30
87
87
85
86
BN
GW
Cooling Fans
3
C1032
P125
Engine Compart-
ment Fuse Box
With Air Condi-
tioning only
NAS
SEQUENTIAL MULTIPORT FUEL INJECTION (SFI–V8) (NAS ONLY)
A3
13
CIRCUIT DIAGRAM
C1033
13
14
Z132
Engine Control
Module (ECM)
S151
Z261
Ignition Coils
15
1
3
2
4
C1002
1
1&6
2&3
4&7
5&8
5
C1002
WG
See Fuse Details
P127
Satellite Fuse
Box 1
15
F 3
20 A
WB
WU
WY
WK
NAS
R
R
R
R
U
O
P
G
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