Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 803

WI-41

Engine Electrical System

WIRING SYSTEM

ECM

3

2

1

6

4 5

E/G-0

8

E/G-0

8

B137

WI-33798

B83

B134

B135

10 11 12 13 14 15

25

24

16

30

9

8

17 18 19

20
28

21 22 23

32

31

26 27

33

34 35

E8

1 2

E/G-07

E/G-07

E21

1 2 3

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

E57

1 2 3 4 5 6

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

5

6

7

2

1

3

4

29

B21

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

E/G-11

*

1

B30

A29

A19

E/G-06

E/G-14

E/G-09

E/G-14

E/G-09

A1

8

A2

8

E/G-06

E/G-06

D:

*

1

*

1

*

1

*

1

A:

B:

B83

B137

D:

B135

B:

B134

A:

E2

B21

2

1

E8

3

8

39

A2

12

6

D22

1

8

D2

8

23

D20

3

1

E21

2

2

8

E19

A1

4

3

E57

6

5

1

2

25

24

*

1

BL

BrW

BW

B

WG

Y

WB

WG

YW

Or

YW

PB

WG

PB

BrW

BY

YG

Gr

BrW

GY

BY

Gr

YB

YR

YL

M

O

L

L

L

W

G

W

W

Y

X

V

BY

W

B

BL

G

L

K

S

R

BrW

BY

Or

BL

YG

YW

Y

U

(BLACK)

: TERMINAL No. OPTIONAL

ARRANGEMENT

JOINT

CONNECTOR

ELECTRONIC THROTTLE CONTROL

POWER STEERING

OIL PRESSURE SWITCH

MANIFOLD

ABSOLUTE

PRESSURE

SENSOR

ENGINE

COOLANT

TEMPERATURE

SENSOR

(BLACK)

(BLACK)

(BLACK)

WI-42

Engine Electrical System

WIRING SYSTEM

E/G-09

E/G-09

B21

WI-30396

B134

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

D9

E40

1 2

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

D10

D1

1

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

E51

E55

B134

A:

B137

D:

E41

2

1

E51

1 2 3

4 5

3

4

6

1

2

3

1

47

A:

27

1

6

E/G-08

E/G-08

E/G-14

E/G-10

E/G-10

D:

1

3

4 5 6

2

E41

E2

B21

1

4

5

2

9

30

A23

2

3

A24

E55

4

5

8

1

9

A2

5

E40

1

2

46

A26

ECM

RL

BR

GW

L

GW

RB

RL

WL

RL

RL

WL

RB

RY

BY

BL

RG

YL

PL

YL

PL

BL

RY

RG

a

Z

b

X

W

WR

WR

YR

WL

RR

WR

BL

BY

YR

R

BR

BY

W

WL

W

WR

WL

LW

(BLACK)

SECONDARY

AIR COMBINATION

VALVE LH

TUMBLE GENERATOR

VALVE ASSY RH

TUMBLE GENERATOR

VALVE ASSY LH

SECONDARY

AIR COMBINATION

VALVE RH

(BLACK)

(LIGHT GRAY)

(LIGHT GRAY)

(BLACK)

WI-43

Engine Electrical System

WIRING SYSTEM

ECM

B143

E/G-10

E/G-10

1

3 4

2

9

7 8

10

5
6

15

16

1
5

4
9

WI-33799

F11

F9

12

13

14

11

B144

7

6

2

8

3

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

B2

A5

B12

A18

B14

A16

D4

A14

B9

A11

B10

A20

B4

A8

B135

10 11 12 13 14 15

25

24

16

30

9

8

17 18 19

20
28

21 22 23

32

31

26 27

33

34 35

2

1

E/G-07

E/G-09

E/G-09

B

8

B20

2

D:

B:

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

A: F37

8

11

6

3

5

6

7

2

1

3

4

29

F9

F9

F9

A: F37

B: B143 D: B144

1

B27

F11

5

16

10A

10

7

9

12

14

13

15

1

4

2

F9

B:

B: B135

60A

MB-33

(B)

MB-34

(B)

RB

R

YL

W

RG

W

YB

R

L

YL

RG

Z

a

Q

B

GP

W

W

W

W

R

RB

B

RG

RG

YB

YB

YL

YB

R

R

L

L

R

R

RB

RB

RELAY

HOLDER

MAIN FUSE BOX (M/B)

SECONDARY

AIR PUMP

SECONDARY

AIR COMBINATION

VALVE RELAY 1

SECONDARY AIR COMBINATION VALVE RELAY 2

SECONDARY AIR PUMP RELAY

TO POWER SUPPLY CIRCUIT

SECONDARY AIR RELAY HOLDER

(BROWN)

BUS BAR

WI-44

Engine Electrical System

WIRING SYSTEM

ECM

E/G-11

E/G-11

B21

10 11 12 13 14 15

25

24

16

30

9

8

17 18 19

20
28

21 22 23

32

31

26 27

33

34 35

B136

B92

WI-33800

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

B4

R400

B137

5

6

7

2

1

3

4

29

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

E38

E37

1 2

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

D27

14

C21

1 2

4

5 6 7 8

3

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

16
27
35

2 3 4 5

6 7 8 9

11 12 13 14

17 18 19 20

1

10

15 16

B134

A:

B135

B:

B136

C:

B137

D:

E37

1

2

33

32

A16

A17

E38

1

2

22

21

A27

A34

A:

E/G-08

E/G-06

E/G-01

17

R400

4

6

8

7

5

1

16

15

D:

B: B135

C:

E2

B21

R5

B92

13

3

ELCM

YL

LOr

LOr

WL

WL

BrW

YL

LOr

YW

WL

Lg

YW

Y

Lg

Lg

C

P

U

GW

GR

GB

WB

GB

WB

GW

GR

GL

G

LB

YB

LB

GL

YB

G

LOr

BrW

BrW

Lg

BrW

VACUUM

PUMP

PRESSURE

SENSOR

SWITCHING

VALVE

(GRAY)

(BLACK)

OIL FLOW CONTROL

SOLENOID VALVE RH

OIL FLOW CONTROL

SOLENOID VALVE LH

(BLUE)

(BLUE)