Subaru Legacy IV (2008 year). Manual - part 299
EN(H4DOTC)(diag)-17
Engine Control Module (ECM) I/O Signal
ENGINE (DIAGNOSTICS)
5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
Contents
Connector
No.
Terminal
No.
Signal (V)
Note
Ignition SW ON
(engine OFF)
Engine ON
(idling)
Crankshaft
position sensor
Signal (+)
B134
13
0
–7 — +7
Waveform
Signal (–)
B134
14
0
0
—
Shield
B134
24
0
0
—
Rear oxygen
sensor
Signal
B135
4
0
0 — 0.9
—
Shield
B135
1
0
0
—
Ground
(sensor)
B135
30
0
0
—
Front oxygen
(A/F) sensor
heater
Signal 1
B136
3
—
—
Waveform
Signal 2
B136
2
—
—
Waveform
Rear oxygen sensor heater signal
B136
4
0 — 13
12 — 14
Waveform
Engine coolant
temperature
sensor
Signal
B134
34
1.0 — 1.4
1.0 — 1.4
After engine is
warmed up.
Ground
(sensor)
B134
29
0
0
After engine is
warmed up.
Air flow sensor
Signal
B135
26
—
0.3 — 4.5
—
Shield
B135
35
0
0
—
Ground
B135
34
0
0
—
Intake air temperature sensor
signal
B135
18
0.3 — 4.6
0.3 — 4.6
—
Wastegate control solenoid
valve
B137
27
0 or 10 — 13
0 or 12 — 14
Waveform
Starter switch
B136
32
0
0
Cranking: 8 — 14
A/C switch
B136
24
ON: 10 — 13
OFF: 0
ON: 12 — 14
OFF: 0
—
Ignition switch
B135
19
10 — 13
12 — 14
—
Neutral position switch (AT / MT)
B136
31
ON: 0
OFF: 10 — 13
ON: 0
OFF: 12 — 14
—
Delivery (test) mode connector
B135
27
10 — 13
13 — 14
When connected: 0
EN-05288
B134
5
6
7
8
2
1
9
4
3
10
24
22
23
25
11
12
13
14
15
26
27
28
16
17
18
19
20
21
33
34
29
32
30
31
B136
5
6
7
8
2
1
9
4
3
10
24
22
23
25
11
12
13
14
15
26
27
28
16
17
18
19
20
21
33
34
29
32
30
31
35
B135
5
6
7
8
2
1
9
4
3
10
24
22
23
25
11
12
13
14
15
26
27
28
16
17
18
19
20
21
29
30
31
32
33
34
35
B137
5
6
7
8
2
1
9
4
3
10
22
23
11
12
13
14
15
24
25
26
16
17
18
19
20
21
27
28
29
30
31
TO A:
TO B:
TO C:
TO D: