Engine Control Module (Ecm) I/O Signal - Subaru Legacy 2004 Service Manual

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

A: ELECTRICAL SPECIFICATION
To B134
7 6 5 4 3 2
17 16 15 14 13 12 11 10 9
27 26 25 24 23 22 21 20 19
34 33 32 31 30 29
Description
Signal (+)
Crankshaft
position sen- Signal (")
sor
Shield
Camshaft position sensor
(LH)
Camshaft position sensor
(RH)
Main
Electronic
throttle control
Sub
Electronic throttle control
motor (+)
Electronic throttle control
motor (")
Electronic throttle control
motor power supply
Electronic throttle control
motor relay
Main
Power
Accelerator
supply
position sen-
sor
Ground
Sub
Engine coolant tempera-
ture sensor
Starter switch
Engine Control Module (ECM) I/O Signal
To B135
1 7 6 5 4 3
8 19 18 17 16 15 14 13 12 11
18 27 26 25 24 23
28 35 34 33 32 31
Connector Terminal
No. No.
B135 10
B135 22
B135 31
B135 8
B135 9
B136 18
B136 29
B137 5
B137 4
B137 6
B135 35
B136 17
B136 15
B136 34
B136 28
B136 14
B137 8
EN(H6DO)(diag)-17
To B136
2 1 6 5 4 3
10 9 8 16 15 14 13 12 11 10
22 21 20 27 26 25 24 23 22 21
30 29 28 35 34 33 32 31
Signal (V)
Ignition SW ON
(engine OFF)
0
0
0
0.275
0.275
0.64 — 0.94
(After engine is
Fully opens: 4.01
1.51 — 1.76
(After engine is
Fully opens: 4.23
Duty waveform Duty waveform
Duty waveform Duty waveform
10 — 13
ON: 0
OFF: 10 — 13 OFF: 13 — 14
Fully closed: 1 Fully closed: 1
Fully opens: 3.6 Fully opens: 3.3
5
0
Fully closed: 1 Fully closed: 1
Fully opens: 3.7 Fully opens: 3.3
1.0 — 1.4
0
ENGINE (DIAGNOSTICS)
To B137
2 1 7 6 5
9 8 7 17 16 15 14 13
20 19 18 17 25 24 23
30 29 28 31 30 29
Reference
Engine ON
(idling)
"7 — +7
0
0
0 or 5
0 or 5
0.64 — 0.72
Fully closed: 0.6
Fully opened: 4.01
warmed-up.)
1.51 — 1.58
Fully closed: 1.48
Fully opens: 4.23
warmed-up.)
Drive frequency: 500 Hz
Drive frequency: 500 Hz
12 — 14
ON: 0 When ignition switch is
turned to ON: ON
5
0
1.0 — 1.4 After engine is warmed-up.
0 Cranking: 8 — 14
4 3 2 1
12 11 10 9 8
22 21 20 19 18
28 27 26
EN-01812
Waveform
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Waveform
Waveform
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