Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. 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