Subaru Crosstrek Service Manual: Engine control module (ecm) i/o signal Electrical specification

Crankshaft position sensor

(+) signal

B136

16

5

0 or 5

Waveform*

(−) signal

B136

27

0

0

—

Front oxygen (A/F) sensor

(+) signal

B136

19

2.8 — 3.2

2.8 — 3.2

—

(−) signal

B136

18

2.4 — 2.7

2.4 — 2.7

—

Rear oxygen sensor

Signal

B136

21

0

0 — 0.9

—

Front oxygen (A/F) sensor heater signal

B136

5

Battery voltage

0 or battery voltage

Waveform

Rear oxygen sensor heater signal

B134

6

Battery voltage

0 or battery voltage

Waveform

Oxygen sensor

Shield

B136

30

0

0

—

Engine coolant temperature sensor

Signal

B134

30

1 — 1.4

1 — 1.6

—

Air flow sensor

Signal

B137

22

—

0.3 — 4.5

—

Shield

B137

28

0

0

—

Ground

B137

29

0

0

—

Intake air temperature sensor signal

B137

12

0.3 — 4.6

0.3 — 4.6

—

Engine oil temperature sensor signal

B134

20

1 — 1.4

1 — 1.6

—

Starter switch

B137

17

Waveform

Waveform

Model without push button start: Waveform

Models with push button start: Waveform

Accessory cut request

B135

32

Waveform

Waveform

Model without push button start: Waveform

Models with push button start: Waveform

Starter switch 2

B137

14

Waveform

Waveform

Model without push button start: Waveform

Models with push button start: Waveform

Starter cut relay

B135

34

Waveform

Waveform

Model without push button start: Waveform

Models with push button start: Waveform

Ignition switch

B137

27

Battery voltage

Battery voltage

—

Neutral position switch

B137

16

ON: 0

OFF: Battery voltage

ON: 0

OFF: Battery voltage

—

Delivery mode switch

B137

13

Battery voltage

Battery voltage

When fuse is installed: 0

Knock sensor

Signal

B136

28

2.5

2.5

—

Shield

B136

29

0

0

—

Back-up power supply

B137

2

Battery voltage

Battery voltage

—

Control module power supply

B136

6

Battery voltage

Battery voltage

—

B137

1

Battery voltage

Battery voltage

—

Sensor power supply

B134

19

5

5

—

B135

22

5

5

—

Ignition control

#1

B134

21

0

0 or 5

Waveform

#2

B134

10

0

0 or 5

Waveform

#3

B134

31

0

0 or 5

Waveform

#4

B134

8

0

0 or 5

Waveform

Fuel injector

#1

B134

12

Battery voltage

0 or battery voltage

Waveform

#2

B134

22

Battery voltage

0 or battery voltage

Waveform

#3

B134

32

Battery voltage

0 or battery voltage

Waveform

#4

B134

13

Battery voltage

0 or battery voltage

Waveform

Fuel pump relay control

B135

19

Battery voltage

ON: 0.5 or less

OFF: Battery voltage

—

A/C relay control

B135

35

ON: 0.5 or less

OFF: Battery voltage

ON: 0.5 or less

OFF: Battery voltage

—

A/C switch

B137

26

ON: Battery voltage

OFF: 0

ON: Battery voltage

OFF: 0

Manual A/C model

Blower fan switch

B137

20

ON: 0

OFF: Battery voltage

ON: 0

OFF: Battery voltage

Manual A/C model

A/C middle pressure switch

B137

8

ON: 0

OFF: Battery voltage

ON: 0

OFF: Battery voltage

—

Main fan relay control

B135

12

ON: 0.5 or less

OFF: Battery voltage

ON: 0.5 or less

OFF: Battery voltage

—

Sub fan relay control

B135

11

ON: 0.5 or less

OFF: Battery voltage

ON: 0.5 or less

OFF: Battery voltage

—

Engine speed output

B135

15

—

0 or battery voltage

Waveform

Purge control solenoid valve

B134

11

Battery voltage

Battery voltage

When in operation: 0 or battery voltage

EGR control valve

Signal 1

B136

11

Battery voltage

0 or battery voltage

—

Signal 2

B136

13

Battery voltage

0 or battery voltage

—

Signal 3

B136

31

Battery voltage

0 or battery voltage

—

Signal 4

B136

32

Battery voltage

0 or battery voltage

—

Manifold absolute pressure sensor signal

B136

20

3.4 — 3.8

1 — 1.6

—

Electronic throttle control

Main signal

B134

18

Approx. 0.7

Approx. 0.6 — 0.7

Fully closed: Approx. 0.6

Fully open: Approx. 4.0

Sub signal

B134

28

Approx. 1.6

Approx. 1.5 — 1.6

Fully closed: Approx. 1.5

Fully open: Approx. 4.2

Electronic throttle control motor (+)

B134

2

Duty waveform

Duty waveform

Drive frequency: 500 Hz

Electronic throttle control motor (−)

B134

1

Duty waveform

Duty waveform

Drive frequency: 500 Hz

Electronic throttle control motor power supply

B135

7

Battery voltage

Battery voltage

—

Electronic throttle control motor relay

B135

17

0

0

—

Intake oil control solenoid RH

B134

17

Battery voltage

0 or battery voltage

Waveform

Intake oil control solenoid LH

B134

16

Battery voltage

0 or battery voltage

Waveform

Exhaust oil control solenoid RH

B134

7

Battery voltage

0 or battery voltage

Waveform

Exhaust oil control solenoid LH

B134

5

Battery voltage

0 or battery voltage

Waveform

Intake camshaft position sensor RH

B136

26

0 or 5

0 or 5

Waveform*

Intake camshaft position sensor LH

B136

15

0 or 5

0 or 5

Waveform*

Exhaust camshaft position sensor RH

B136

14

0 or 5

0 or 5

Waveform*

Exhaust camshaft position sensor LH

B136

25

0 or 5

0 or 5

Waveform*

Camshaft position sensor ground

B136

34

0

0

—

Accelerator pedal position sensor

Main signal

B135

23

Fully closed: 0.4 — 1

Fully opened: 2.4 — 3.7

Fully closed: 0.4 — 1

Fully opened: 2.4 — 3.7

—

Main power supply

B135

21

5

5

—

Ground

(main)

B135

29

0

0

—

Sub 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

—

Starter relay

B135

26

Waveform

Waveform

Model without push button start: Waveform

Models with push button start: Waveform

Clutch switch

B137

15

ON: 0

OFF: Battery voltage

ON: 0

OFF: Battery voltage

—

Brake switch 1

(Brake switch)

B137

7

When brake pedal is depressed: 0

When brake pedal is released: Battery voltage

When brake pedal is depressed: 0

When brake pedal is released: Battery voltage

—

Brake switch 2

(Stop light switch)

B137

3

When brake pedal is depressed: Battery voltage

When brake pedal is released: 0

When brake pedal is depressed: Battery voltage

When brake pedal is released: 0

—

Cruise control command switch

B137

30

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 CANCEL: 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 CANCEL: 0 — 0.5

—

Cruise control main switch

B137

23

ON: 0

OFF: 5

ON: 0

OFF: 5

—

CAN communication

(MAIN-CAN)

(Hi)

B137

19

—

—

—

(Lo)

B137

18

—

—

—

Self-shutoff control

B135

13

0

0