Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 200

EN(H4DOTC)(diag)-24

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

Ignition switch

B136

30

10 — 13

12 — 14

—

Neutral position switch

B136

35

ON: 0

OFF: 10 — 13

ON: 0

OFF: 12 — 14

—

Delivery (test) mode
connector

B136

34

10 — 13

13 — 14

When connected: 0

Knock sen-
sor

Signal

B137

2

2.45 — 2.55

2.45 — 2.55

—

Shield

B137

8

0

0

—

Back-up power supply

B136

2

10 — 13

12 — 14

Ignition switch “OFF”: 10 — 13

Control module power
supply

B136

1

10 — 13

12 — 14

—

B137

7

10 — 13

12 — 14

—

Sensor power supply

B134

19

5

5

—

Ignition
control

#1

B134

21

0

0 or 5

Waveform

#2

B134

22

0

0 or 5

Waveform

#3

B134

31

0

0 or 5

Waveform

#4

B134

32

0

0 or 5

Waveform

Fuel injec-
tor

#1

B134

10

10 — 13

1 — 14

Waveform

#2

B134

11

10 — 13

1 — 14

Waveform

#3

B134

12

10 — 13

1 — 14

Waveform

#4

B134

13

10 — 13

1 — 14

Waveform

Fuel pump
control unit

Control

B136

33

0 or 5

0 or 5

Waveform

Diagnos-
tic signal

B135

10

10 — 13

12 — 14

—

A/C relay control

B135

35

ON: 0.5 or less

OFF: 10 — 13

ON: 0.5 or less

OFF: 12 — 14

—

Main fan relay control

B135

12

ON: 0.5 or less

OFF: 10 — 13

ON: 0.5 or less

OFF: 12 — 14

—

Sub fan relay control

B135

11

ON: 0.5 or less

OFF: 10 — 13

ON: 0.5 or less

OFF: 12 — 14

—

Engine speed output

B135

15

—

0 — 13 or more

Waveform

Purge control solenoid
valve 1

B137

6

ON: 1 or less

OFF: 10 — 13

ON: 1 or less

OFF: 12 — 14

Waveform

Purge control solenoid
valve 2

B137

15

ON: 1 or less

OFF: 10 — 13

ON: 1 or less

OFF: 12 — 14

Waveform

Manifold
absolute
pressure
sensor

Signal

B137

20

1.7 — 2.4

1.1 — 1.6

—

Power
supply

B134

19

5

5

Ground
(sensor)

B134

29

0

0

Power steering oil pres-
sure switch

B137

28

10 — 13

ON: 0

OFF: 12 — 14

—

SSM/GST communica-
tion line

B135

14

1 or less ←→ 4 or more

1 or less ←→ 4 or more

—

Intake camshaft posi-
tion sensor (LH)

B137

16

0 or 5

0 or 5

Waveform

Intake camshaft posi-
tion sensor (RH)

B137

24

0 or 5

0 or 5

Waveform

Exhaust camshaft posi-
tion sensor (LH)

B137

29

0 or 5

0 or 5

Models with SI-DRIVE

Waveform

Exhaust camshaft posi-
tion sensor (RH)

B137

23

0 or 5

0 or 5

Models with SI-DRIVE

Waveform

Description

Con-

nector

No.

Termi-

nal No.

Signal (V)

Note

Ignition SW ON

(engine OFF)

Engine ON

(idling)

EN(H4DOTC)(diag)-25

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

Camshaft position sen-
sor ground

B137

30

0

0

—

Electronic
Throttle

Main

B134

18

Approx. 0.9

(After engine is warmed

up.)

Approx. 0.6 — 0.7

(After engine is warmed

up.)

Fully closed: Approx. 0.6

Fully open: Approx. 4.0

Sub

B134

28

Approx. 1.7

(After engine is warmed

up.)

Approx. 1.5 — 1.6

(After engine is warmed

up.)

Fully closed: Approx. 1.5

Fully open: Approx. 4.2

Power
supply

B134

19

5

5

—

Ground
(sensor)

B134

29

0

0

—

Electronic throttle con-
trol motor (+)

B134

2

Duty waveform

Duty waveform

Drive frequency: 500 Hz

Electronic throttle con-
trol motor (–)

B134

1

Duty waveform

Duty waveform

Drive frequency: 500 Hz

Electronic throttle con-
trol motor power supply

B135

7

10 — 13

12 — 14

—

Electronic throttle con-
trol motor relay

B135

17

ON: 0

OFF: 10 — 13

ON: 0

OFF: 12 — 14

When ignition switch is turned

to ON: ON

Intake oil
flow con-
trol sole-
noid valve
(LH)

Signal (+)

B134

17

ON: 10 — 13

OFF: 0

ON: 12 — 14

OFF: 0

—

Signal (–)

B134

16

0

0

—

Intake oil
flow con-
trol sole-
noid valve
(RH)

Signal (+)

B134

34

ON: 10 — 13

OFF: 0

ON: 12 — 14

OFF: 0

—

Signal (–)

B134

27

0

0

—

Exhaust oil
flow con-
trol sole-
noid valve
(LH)

Signal (+)

B134

5

ON: 10 — 13

OFF: 0

ON: 12 — 14

OFF: 0

Models with SI-DRIVE

Signal (–)

B134

14

0

0

Models with SI-DRIVE

Exhaust oil
flow con-
trol sole-
noid valve
(RH)

Signal (+)

B134

7

ON: 10 — 13

OFF: 0

ON: 12 — 14

OFF: 0

Models with SI-DRIVE

Signal (–)

B134

15

0

0

Models with SI-DRIVE

Description

Con-

nector

No.

Termi-

nal No.

Signal (V)

Note

Ignition SW ON

(engine OFF)

Engine ON

(idling)

EN(H4DOTC)(diag)-26

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

Accelera-
tor pedal
position
sensor

Main sen-
sor signal

B135

23

Fully closed: 0.4 — 1.0

Fully opened: 2.4 — 3.7

Fully closed: 0.4 — 1.0

Fully opened: 2.4 — 3.7

—

Main
power
supply

B135

21

5

5

—

Ground
(main
sensor)

B135

29

0

0

—

Shield

B136

4

0

0

—

Sub sen-
sor signal

B135

31

Fully closed: 0.3 — 1.1

Fully opened: 2.3 — 3.8

Fully closed: 0.3 — 1.1

Fully opened: 2.3 — 3.8

—

Sub
power
supply

B135

22

5

5

—

Ground
(sub sen-
sor)

B135

30

0

0

—

Starter relay

B135

26

ON: 0

OFF: 10 — 13

ON: 0

OFF: 12 — 14

ON: cranking

A/C middle pressure
switch

B136

7

ON: 0

OFF: 10 — 13

ON: 0

OFF: 12 — 14

—

Blower fan switch

B135

19

ON: 0

OFF: 10 — 13

ON: 0

OFF: 12 — 14

Manual A/C model

Clutch switch

B135

9

When clutch pedal is

depressed: 0

When clutch pedal is

released: 10 — 13

When clutch pedal is

depressed: 0

When clutch pedal is

released: 12 — 14

—

Brake switch 1
(brake switch)

B136

15

When brake pedal is

depressed: 0

When brake pedal is

released: 10 — 13

When brake pedal is

depressed: 0

When brake pedal is

released: 12 — 14

—

Brake switch 2
(stop light switch)

B136

3

When brake pedal is

depressed: 10 — 13

When brake pedal is

released: 0

When brake pedal is

depressed: 12 — 14

When brake pedal is

released: 0

—

Cruise control com-
mand switch

B136

12

When operating nothing:

3.5 — 4.5

When operating RES/

ACC: 2.5 — 3.5

When operating SET/

COAST: 0.5 — 1.5

When operating CAN-

CEL: 0 — 0.5

When operating nothing:

3.5 — 4.5

When operating RES/

ACC: 2.5 — 3.5

When operating SET/

COAST: 0.5 — 1.5

When operating CAN-

CEL: 0 — 0.5

—

Cruise control main
switch

B136

13

ON: 0

OFF: 5

ON: 0

OFF: 5

—

Fuel tank pressure sen-
sor

B136

21

2.3 — 2.7

2.3 — 2.7

—

Pressure control sole-
noid valve assembly

B135

3

ON: 1 or less

OFF: 10 — 13

ON: 1 or less

OFF: 12 — 14

—

Immobi-
lizer

Signal 1

B135

25

—

—

—

Signal 2

B135

24

—

—

—

CAN communication
(Hi)

B136

17

—

—

—

Description

Con-

nector

No.

Termi-

nal No.

Signal (V)

Note

Ignition SW ON

(engine OFF)

Engine ON

(idling)

EN(H4DOTC)(diag)-27

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

CAN communication
(Lo)

B136

28

—

—

—

Blow-by leak diagnosis

B137

12

0

0

At the time of open circuit

(fault): 5

Tumble generator valve
position sensor signal
(RH)

B137

11

Fully closed: 0.4 — 1.2

Fully opened: 2.8 — 4.6

Fully closed: 0.4 — 1.2

Fully opened: 2.8 — 4.6

—

Tumble generator valve
position sensor signal
(LH)

B137

10

Fully closed: 0.4 — 1.2

Fully opened: 2.8 — 4.6

Fully closed: 0.4 — 1.2

Fully opened: 2.8 — 4.6

—

Tumble generator valve
(RH closed)

B134

26

0 or 10 — 13

0 or 12 — 14

—

Tumble generator valve
(LH closed)

B134

24

0 or 10 — 13

0 or 12 — 14

—

Tumble generator valve
(RH open)

B134

25

0 or 10 — 13

0 or 12 — 14

—

Tumble generator valve
(LH open)

B134

23

0 or 10 — 13

0 or 12 — 14

—

Secondary
air pipe
pressure
sensor

Signal

B137

9

2.2 — 2.8

2.2 — 2.8

When secondary air is

inducted: 3.2 — 4.9

Power
supply

B134

19

5.12

5.12

—

Ground
(sensor)

B134

29

0

0

—

Secondary air combi-
nation valve relay 1

B135

8

ON: 0

OFF: 10 — 13

ON: 0

OFF: 12 — 14

—

Secondary air combi-
nation valve relay 2

B135

20

ON: 0

OFF: 10 — 13

ON: 0

OFF: 12 — 14

—

Secondary air pump
relay

B135

27

ON: 0

OFF: 10 — 13

ON: 0

OFF: 12 — 14

—

Self-shutoff control

B135

13

10 — 13

12 — 14

—

ELCM

Switch-
ing valve

B135

4

10 — 13

12 — 14

Operating: 0

Pressure
sensor

B136

21

1 — 4

1 — 4

When ignition switch is turned

to ON: atmospheric pressure

Vacuum
pump

B137

27

10 — 13

12 — 14

Operating: 0

Ground (engine 1)

B134

6

0

0

—

Ground (engine 2)

B134

4

0

0

—

Ground (engine 3)

B134

3

0

0

—

Ground (engine 4)

B137

1

0

0

—

Ground (engine 5)

B137

3

0

0

—

Ground (body)

B136

4

0

0

—

Description

Con-

nector

No.

Termi-

nal No.

Signal (V)

Note

Ignition SW ON

(engine OFF)

Engine ON

(idling)