Subaru Legacy IV (2008 year). Manual - part 301

EN(H4DOTC)(diag)-25

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

2

C8

C3

B1

C2

B8

B9

C4

C30

B4

A27

9

8

6

C19

SECONDARY 

AIR

PUMP

REAR

OXYGEN 

SENSOR RH

RELAY HOLDER 

FUSE 60A

RELAY HOLDER 

FUSE 10A

A13

A14

A25

A24

CRANKSHAFT

POSITION SENSOR

D17

D16

D15

D14

OIL FLOW 
CONTROL 

SOLENOID VALVE LH

D22

D23

A26

D12

D13

A16

TUMBLE

GENERATOR 

VALVE ASSY

LH

OIL FLOW 
CONTROL 

SOLENOID VALVE RH

A15

SECONDARY

AIR

COMBINATION 

VALVE RELAY 2

SECONDARY AIR 

PUMP VALVE

RELAY

8

10

9

10

KNOCK SENSOR

TUMBLE

GENERATOR 

VALVE ASSY

RH

7

EN-06950

FRONT 

OXYGEN 

(A/F)

SENSOR RH

SECONDARY AIR 

COMBINATION 

VALVE RH

SECONDARY 

AIR

COMBINATION 

VALVE RELAY 1

SECONDARY AIR 

COMBINATION 

VALVE LH

EN(H4DOTC)(diag)-26

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

C24

C33

C9

D7

D3

D1

D2

A5

C15

C26

B28

B12

B24

C35

C18

C29

C27

C34

B20

B32

C28

C17

10

MT

13

11

7

EN-05718

FUEL TANK 

PRESSURE SENSOR

PRESSURE CONTROL 

SOLENOID VALVE

DRAIN VALVE

STOP LIGHT SWITCH

BRAKE SWITCH

CRUISE CONTROL SWITCH

SUB FAN RELAY

MAIN FAN RELAY

A/C CONTROL MODULE

A/C PRESSURE SWITCH

A/C RELAY 

ENGINE GROUND

BODY INTEGRATED UNIT

(IMMOBILIZER)

(CAN COMMUNICATION)

BODY INTEGRATED UNIT

EN(H4DOTC)(diag)-27

Engine Condition Data

ENGINE (DIAGNOSTICS)

6. Engine Condition Data

A: ELECTRICAL SPECIFICATION

Measuring condition:
• After engine is warmed up.
• Set the select lever in “P” range or “N” range, or the shift lever in neutral.
• Turn the A/C to OFF.
• Turn all the accessory switches to OFF.

Contents

Specification

Engine Load

17.6 — 35.64 (%): Idling

13.2 — 26.73 (%): 2,500 rpm racing

EN(H4DOTC)(diag)-28

Data Link Connector

ENGINE (DIAGNOSTICS)

7. Data Link Connector

A: NOTE

This connector is used for Subaru Select Monitor.

CAUTION:
Do not connect any scan tools except Subaru Select Monitor or general scan tool because the circuit
for Subaru Select Monitor may be damaged.

1

2

3

4

5

7

6

8

9 10 11 12 13

15

14

16

EN-04893

Terminal No.

Contents

Terminal No.

Contents

1

Power supply

9

Blank

2

Blank

10

Blank

3

Blank

11

Blank

4

Ground

12

Blank

5

Ground

13

Blank

6

CAN communication (+)

14

CAN communication (–)

7

Subaru Select Monitor signal

15

Blank

8

Blank

16

Power supply