Subaru Legacy 2003 Service Manual page 422

ENGINE CONTROL MODULE (ECM) I/O SIGNAL
Content
A/C switch
Ignition switch
Neutral position switch
(MT)
Neutral position switch
(AT)
Test mode connector
Signal
Knock
sensor
Shield
Back-up power supply
Control unit power sup-
ply
Sensor power supply
#1, #2
Ignition
control
#3, #4
#1
#2
Fuel injec-
tor
#3
#4
Signal 1
Idle air
Signal 2
control
solenoid
Signal 3
valve
Signal 4
Fuel pump relay control
A/C relay control
Radiator fan relay 1
control
Radiator fan relay 2
control
Self-shutoff control
Malfunction indicator
lamp
Engine speed output
Torque control 1 signal
Torque control 2 signal
Torque control cut sig-
nal
Purge control solenoid
valve
Fuel level sensor
Signal 1
Signal 2
EGR sole-
noid valve
Signal 3
Signal 4
AT diagnosis input sig-
nal
Small light switch
Con-
Termi-
nector
Ignition SW ON
nal No.
No.
(Engine OFF)
ON: 10 — 13
B136 11
B136 10 10 — 13
B136 21
B136 21
B136 3
B135 16
B135 27
B135 9 10 — 13
B135 1 10 — 13
B135 2 10 — 13
B135 3
B134 33
B134 32
B134 34 10 — 13
B134 23 10 — 13
B134 22 10 — 13
B134 8 10 — 13
B134 20
B134 6
B134 5
B134 19
ON: 0.5, or less
B134 2
OFF: 10 — 13
ON: 0.5, or less
B134 9
OFF: 10 — 13
ON: 0.5, or less
B134 14
OFF: 10 — 13
ON: 0.5, or less
B134 13
OFF: 10 — 13
B136 12 10 — 13
B134 28
B134 10
B136 1
B136 18
B136 5
ON: 1, or less
B134 29
OFF: 10 — 13
B135 25 0.12 — 4.75
B134 18 0 or 10 — 13
B134 17 0 or 10 — 13
B134 16 0 or 10 — 13
B134 15 0 or 10 — 13
Less than 1 ←→ More
B137 19
B137 20
OFF: 10 — 13
EN(H4SO)-25
Signal (V)
Engine ON (Idling)
ON: 13 — 14
OFF: 0 OFF: 0
13 — 14
ON: 5
OFF: 0
ON: 0
OFF: 5
5
2.8
0
13 — 14
13 — 14
13 — 14
5
0 1 — 3.4
0 1 — 3.4
1 — 14
1 — 14
1 — 14
1 — 14
— 1 — 13
— 1 — 13
— 1 — 13
— 1 — 13
0.5, or less
ON: 0.5, or less
OFF: 13 — 14
ON: 0.5, or less
OFF: 13 — 14
ON: 0.5, or less
OFF: 13 — 14
13 — 14
—
— 0 — 13, or more
5
5
8
ON: 1, or less
OFF: 13 — 14
0.12 — 4.75
0 or 10 — 13
0 or 10 — 13
0 or 10 — 13
0 or 10 — 13
Less than 1 ←→ More
than 4 than 4
ON: 0 ON: 0
OFF: 13 — 14
ENGINE (DIAGNOSTICS)
Switch is ON when gear is in
neutral position.
Switch is ON when shift is in "N"
or "P" position.
5 When connected: 0
2.8
0
Ignition switch "OFF": 10 — 13
5
Waveform
Waveform
Waveform
Waveform
Waveform
Waveform
Waveform
Waveform
Waveform
Waveform
With A/C vehicles only
Light "ON": 1, or less
—
Light "OFF": 10 — 14
Waveform
5
5
8
Waveform
Note
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