Subaru Legacy III (2000-2003 year). Service 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)
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