Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 804
WI-45
Engine Electrical System
WIRING SYSTEM
ECM
E/G-12
E/G-12
E64
E4
E52
E5
E16
E6
E17
B21
WI-33801
B21
E2
B137
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
34 35
42 43
36 37 38 39
48 49 50 51 52 53 54
40 41
44 45
46 47
B134
E5
E16
E6
E17
1 2
E52
E64
8
5
6
10 11 12 13 14 15
7
2
1
3
4
16
30
19 20
22
28 29
9
17
18
25
21
23
24
31
26 27
8
5
6
10 11 12 13 14 15
7
2
1
3
4
16
30
19 20
22
28 29
9
17
18
25
21
23 24
32
31
26 27
33 34
B137
D:
B134
A:
1
50
2
1
11
2
1
44
2
1
54
2
1
53
2
1
52
2
1
51
2
E/G-07
E4
D:
1 2
A:
A33
D6
D15
A10
A11
A12
A13
PG
PB
PL
P
V
RG
YR
T
BL
BL
PG
R
BR
BR
PB
R
BY
BY
PL
R
WW
PR
YL
YL
VR
YG
YG
RG
R
LW
LW
YR
R
(BLACK)
(BLACK)
(BLACK)
(BLUE)
(DARK GRAY)
(DARK GRAY)
(DARK GRAY)
(DARK GRAY)
FUEL
INJECTOR
No. 4
FUEL
INJECTOR
No. 3
FUEL
INJECTOR
No. 2
FUEL
INJECTOR
No. 1
PURGE
CONTROL
SOLENOID
VALVE 2
PURGE
CONTROL
SOLENOID
VALVE 1
WASTEGATE
CONTROL
SOLENOID
VALVE
WI-46
Engine Electrical System
WIRING SYSTEM
ECM
B21
E/G-13
E/G-13
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
34 35
42 43
36 37 38 39
48 49 50 51 52 53 54
40 41
44 45
46 47
WI-33873
B134
B137
B21
E2
8
5
6
10 11 12 13 14 15
7
2
1
3
4
16
30
19 20
22
28 29
9
17
18
25
21
23 24
32
31
26 27
33 34
8
5
6
10 11 12 13 14 15
7
2
1
3
4
16
30
19 20
22
28 29
9
17
18
25
21
23
24
31
26 27
E33
E31
E34
E32
1
2
3
E80
E87
E88
B137
B134
A32
A31
A22
A21
E31
E32
E33
E34
E/G-01
A:
D12
45
E80
E87
E88
1 2
D:
E/G-14
2
1
1
2
1
2
D:
A:
3
1
2
9
49
3
1
2
20
3
1
2
31
3
1
2
10
LW
Y
WL
LW
BrY
WG
LW
GY
YG
LW
BrW
GR
LY
WR
BR
BL
BL
BY
BY
L
d
BrW
BrW
BrW
BrW
LY
GY
BrY
Y
L
YR
YR
A
WR
YG
WG
WL
E/G-14
c
(DARK GRAY)
(DARK GRAY)
(DARK GRAY)
IGNITION
COIL No. 4
IGNITION
COIL No. 3
IGNITION
COIL No. 2
IGNITION
COIL No. 1
(GRAY)
(GRAY)
(GRAY)
(GRAY)
(BLACK)
LEAK
DIAGNOSIS
CONNEC-
TOR
3
LEAK
DIAGNOSIS
CONNEC-
TOR
1
LEAK
DIAGNOSIS
CONNEC-
TOR
2
WI-47
Engine Electrical System
WIRING SYSTEM
ECM
B137
B136
B134
B122
3 4
5
1 2
8
1 2
3 4
10 11 12 13 14 15
25
24
30
9
8
7
17 18 19 20
28
21 22 23
29
32
31
1
2
3
4
5
6
26
33 34
B21
E/G-14
E/G-14
B21
E2
8
5
6
10 11 12 13 14 15
7
2
1
3
4
16
30
19 20
22
28 29
9
17
18
25
21
23
24
31
26 27
8
5
6
10 11 12 13 14 15
7
2
1
3
4
16
30
19 20
22
28 29
9
17
18
25
21
23 24
32
31
26 27
33 34
B122
6 7
B128
16
27
35
*
1
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
34 35
42 43
36 37 38 39
48 49 50 51 52 53 54
40 41
44 45
46 47
WI-33802
B137
B136
B134
C4
A6
A4
36
40
D1
34
A3
35
E/G-05
E/G-06
E/G-08
E/G-08
E/G-06
E/G-09
E/G-13
E/G-13
D:
A:
*
1
*
1
*
1
*
1
*
1
E/G-05
E/G-04
D3
C:
1
2
T9
E/G-05
1 2
D:
C:
A:
*
1
3
1
T12
T2
T2
T12
T9
B128
B128
*
1
T12
BW
BR
GB
BOr
H
BOr
B
LgY
BY
F
G
BR
B
BG
SB
SB
BL
d
c
b
L
Y
V
N
I
LW
BW
B
B
B
GE
B
B
BR
B
BR
BR
B
BW
BW
BW
B
BY
BL
BY
BL
BL
(LIGHT GRAY)
(BLACK)
(BROWN)
NEUTRAL POSITION SWITCH
JOINT
CONNECTOR
: TERMINAL No. OPTIONAL ARRANGEMENT
REF. TO CRUISE
CONTROL SYSTEM
[C/C-04]
WI-48
Engine Electrical System
WIRING SYSTEM
2. WITH SI-DRIVE
ECM
WI-33803
7
8
9
12
10
11
1
2
3
4
6
5
C16
C35
B26
B20
B8
C30
C2
B27
B10
D28
B7
B17
B13
C1
A33
D6
D7
A13
D16
C10
C22
C31
C11
C5
C6
C18
C19
B6
C20
C33
D30
B3
B4
C21
D27
B22
A10
A11
A12
B12
C7
B35
C17
C28
D24
B25
B24
B11
B9
C9
D29
D23
D15
M
ST
ON
ACC
OFF
SBF-6
SBF-8
SBF-5
SBF-7
M
ELCM
FUEL PUMP ASSY
(FUEL PUMP)
A/F
, O
XYGEN
SENSOR RELA
Y
PURGE CONTROL SOLENOID VALVE 2
EXHAUST CAMSHAFT POSITION SENSOR RH
EXHAUST CAMSHAFT POSITION SENSOR LH
SECONDARY
AIR
COMBINATION VALVE RELAY 1
SECONDARY AIR COMBINATION VALVE RELAY 2
SECONDARY
AIR FUSE
SECONDARY
AIR PUMP
SECONDARY AIR PUMP RELAY
PRESSURE CONTROL SOLENOID VALVE
INTAKE CAMSHAFT POSITION SENSOR RH
FUEL INJECTOR No. 4
FUEL INJECTOR No. 3
FUEL INJECTOR No. 2
F/B FUSE No. 21
F/B FUSE No. 12
F/B FUSE
No. 5
F/B FUSE No. 4
F/B FUSE No. 7
M/B FUSE No. 13
CLUTCH SWITCH
MAIN FAN RELAY 1
BODY INTEGRATED UNIT
(IMMOBILIZER)
CAN COMMUNICATION
A/C RELAY
PRESSURE SWITCH
JOINT CONNECTOR
SUB FAN RELAY
FUEL INJECTOR No. 1
WASTEGATE CONTROL SOLENOID VALVE
PURGE CONTROL SOLENOID VALVE 1
POWER STEERING
OIL PRESSURE SWITCH
INTAKE CAMSHAFT POSITION SENSOR LH
FRONT OXYGEN (A/F) SENSOR
REAR OXYGEN SENSOR
MASS AIR FLOW &
INTAKE AIR TEMPERATURE SENSOR
FUEL PUMP CU
FUSE
(RELAY BLOCK)
FUEL PUMP RELAY
ELECTRONIC
THROTTLE
CONTROL
RELAY
MAIN RELAY
STARTER
MOTOR
IGNITION
SWITCH
CLUTCH
START SWITCH
STARTER
RELAY
IG 2 RELAY
M/B FUSE No. 11
BATTERY
MAIN
SBF
MULTI
JOINT
CONNEC-
TOR
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