Subaru Legacy III (2000-2003 year). Manual — part 305

EN(H6DO)-22

ENGINE (DIAGNOSTICS)

ELECTRICAL COMPONENTS LOCATION

• SENSOR

(1) Rear vehicle speed sensor
(2) Front vehicle speed sensor
(3) Torque converter turbine speed sensor
(4) ATF temperature sensor
(5) Brake light switch

( 1 )

( 2 )

EN-00924

( 3 )

EN-00925

( 4 )

EN-00926

EN-00927

( 5 )

EN(H6DO)-23

ENGINE (DIAGNOSTICS)

ELECTRICAL COMPONENTS LOCATION

• SOLENOID VALVE AND SWITCH

(1) Inhibitor switch
(2) Shift solenoid valve 1
(3) Shift solenoid valve 2
(4) Line pressure duty solenoid
(5) Lock-up duty solenoid
(6) Transfer duty solenoid
(7) 2-4 brake duty solenoid
(8) Low clutch timing solenoid valve
(9) 2-4 brake timing solenoid valve

EN-01076

( 1 )

EN-01077

( 2 )

( 3 )

( 4 )

( 5 )

( 7 )

( 8 )

( 9 )

EN-01078

( 6 )

EN(H6DO)-24

ENGINE (DIAGNOSTICS)

ENGINE CONTROL MODULE (ECM) I/O SIGNAL

5. Engine Control Module (ECM) I/O Signal

A: ELECTRICAL SPECIFICATION

Content

Con-

nector

No.

Termi-

nal No.

Signal (V)

Note

Ignition SW ON

(Engine OFF)

Engine ON (Idling)

Crankshaft
position sen-
sor

Signal (+)

B135

2

0

—

Sensor output wave-
form <Ref. to
EN(H6DO)-28, WAVE-
FORM, MEASURE-
MENT, Engine Control
Module (ECM) I/O Sig-
nal.>

Signal (

−

)

B135

11

0

0

—

Shield

B135

21

0

0

—

Camshaft
position sen-
sor

Signal (+)

B135

1

0

—

Sensor output wave-
form <Ref. to
EN(H6DO)-28, WAVE-
FORM, MEASURE-
MENT, Engine Control
Module (ECM) I/O Sig-
nal.>

Signal (

−

)

B135

10

0

0

—

Throttle posi-
tion sensor

Signal

B135

7

Fully closed: 0.3 — 0.8

Fully open: 4.2 — 4.7

0.3 — 0.8

—

Power supply

B135

9

5

5

—

GND (sensor)

B135

19

0

0

—

Rear oxy-
gen sensor

Signal

B135

17

0 — 0.5

0 — 0.9

—

Shield

B135

26

0

0

—

Front oxygen
(A/F) sensor
heater

Signal

LH1

B137

7

—

—

—

LH2

B137

6

—

—

—

RH1

B137

5

—

—

—

RH2

B137

4

—

—

—

Rear oxygen sensor heater signal

B136

13

—

—

—

Vehicle speed signal

B134

1

0 or 5

0 or 5

“5” and “0” are repeat-
edly displayed when
vehicle is driven.

EN-00798

to

to

to

to

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

18

19

20

21

22

16

17

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

18

19

20

21

22

16

17

23

24

27

28

25

26

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

18

19

20

21

22

23

24

16

17

B134

B135

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

18

19

20

21

22

16

17

23

24

27

28

25

26

29

30

31

B137

B136

EN(H6DO)-25

ENGINE (DIAGNOSTICS)

ENGINE CONTROL MODULE (ECM) I/O SIGNAL

Engine cool-
ant tempera-
ture sensor

Signal

B135

18

—

—

After warm-up the
engine.

GND (sensor)

B134

7

0

0

After warm-up the
engine.

15

Generator signal

B137

12

ON: 1, or less

OFF: 10 — 13

ON: 1, or less

OFF: 10 — 13

Waveform

Starter switch

B134

16

0

0

Cranking: 9 — 12

A/C switch

B134

6

ON: 10 — 13

OFF: 0

ON: 13 — 14

OFF: 0

—

Ignition switch

B134

14

10 — 13

13 — 14

—

Neutral position switch

B134

8

ON: 0

OFF: 5

Switch is ON when
shift is in “N” or “P”
position.

Test mode connector

B134

5

5

5

When connected: 0

Knock sen-
sor

Signal

1

B135

4

2.5

2.5

—

2

13

2.5

2.5

—

Shield

B135

22

0

0

—

Back-up power supply

B137

10

10 — 13

13 — 14

Ignition switch “OFF”:
10 — 13

Immobilizer communication 1

B135

5

Less than 1

←→

More

than 4

Less than 1

←→

More

than 4

—

Immobilizer communication 2

B135

14

Less than 1

←→

More

than 4

Less than 1

←→

More

than 4

—

Control unit power supply

B137

2

10 — 13

13 — 14

—

3

10 — 13

13 — 14

—

Sensor power supply

B135

9

5

5

—

Line end check 1

B134

10

0

0

—

Ignition con-
trol

#1

B136

24

0

—

Waveform

#2

B136

23

0

—

Waveform

#3

B136

22

0

—

Waveform

#4

B136

21

0

—

Waveform

#5

B136

20

0

—

Waveform

#6

B136

19

0

—

Waveform

Fuel injector

#1

B137

1

10 — 13

1 — 14

Waveform

#2

B136

6

10 — 13

1 — 14

Waveform

#3

B136

5

10 — 13

1 — 14

Waveform

#4

B136

4

10 — 13

1 — 14

Waveform

#5

B136

3

10 — 13

1 — 14

Waveform

#6

B136

1

10 — 13

1 — 14

Waveform

Idle air con-
trol solenoid
valve

Signal

B136

10

10 — 13

—

Waveform

Fuel pump controller

Signal

B136

16

ON: 0.5, or less

OFF: 10 — 13

ON: 0.5, or less

—

A/C relay control

B137

27

ON: 0.5, or less

OFF: 10 — 13

ON: 0.5, or less

OFF: 13 — 14

—

Radiator fan relay 1 control

B137

17

ON: 0.5, or less

OFF: 10 — 13

ON: 0.5, or less

OFF: 13 — 14

—

Radiator fan relay 2 control

B137

28

ON: 0.5, or less

OFF: 10 — 13

ON: 0.5, or less

OFF: 13 — 14

With A/C vehicles only

Radiator fan relay 3 control

B137

24

ON: 0.5, or less

OFF: 10 — 13

ON: 0.5, or less

OFF: 13 — 14

—

Content

Con-

nector

No.

Termi-

nal No.

Signal (V)

Note

Ignition SW ON

(Engine OFF)

Engine ON (Idling)