Engine Control Module (Ecm) I/O Signal; Electrical Specification - Subaru LEGACY Service Manual

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

A: ELECTRICAL SPECIFICATION
DESCRIPTION
Signal (+)
Crankshaft
position sen- Signal (−)
sor
Shield
Signal (+)
Camshaft
position sen- Signal (−)
sor
Shield
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
Signal
Rear oxygen
sensor
Shield
Engine Control Module (ECM) I/O Signal
B134
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17
18 19 20 21 22 23 24 25 26 27
28 29 30 31 32 33 34
B136
1 2 3 4 5 6
7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27
28 29 30 31 32 33 34 35
Termi-
Connector
nal
Ignition SW ON
No.
No.
(engine OFF)
B135 10
B135 22
B135 31
B135 11
B135 23
B135 31
B136 18
Fully opens: 3.96
B136 29
Fully opens: 4.17
B137 5 Duty waveform
B137 4 Duty waveform
B137 6
B135 35
OFF: 10 — 13
Fully closed: 1
B136 17
Fully opens: 3.3
B136 15
B136 34
Fully closed: 1
B136 28
Fully opens: 3.3
B137 24
B137 31
EN(H4SO 2.5)(diag)-17
B135
1 2 3 4
8 9 10 11 12 13 14 15
20 21 22 23 24
28 29 30 31 32 33
B137
1 2 3 4
8 9 10 11 12 13 14 15
18 19 20 21 22 23
26 27 28 29
Signal (V)
Engine ON
(idling)
−7 — +7
0
0
0
−7 — +7
0
0
0
0.64 — 0.72
0.64 — 0.72
(After engine is
warmed-up.)
1.51 — 1.58
1.51 — 1.58
(After engine is
warmed-up.)
Duty waveform
Duty waveform
10 — 13 13 — 14
ON: 0
OFF: 13 — 14
Fully closed: 1
Fully opens: 3.3
5
0
Fully closed: 1
Fully opens: 3.3
0 0 — 0.9
0
ENGINE (DIAGNOSTICS)
5 6 7
16 17 18 19
25 26 27
34 35
5 6 7
16 17
24 25
30 31
NOTE
Sensor output waveform
0
0
Sensor output waveform
0
0
Fully closed: 0.6
Fully open: 3.96
Fully closed: 1.48
Fully open: 4.17
Drive frequency: 500 Hz
Drive frequency: 500 Hz
ON: 0 When ignition switch is
turned to ON: ON
5
0
0
EN-01982
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