Subaru Legacy 2003 Service Manual page 1861

ENGINE CONTROL MODULE (ECM) I/O SIGNAL
ENGINE (DIAGNOSTICS)
Content
Signal
Power
Pressure
supply
sensor
GND (sen-
sor)
Small light switch
Blower fan switch
Rear defogger switch
Power steering oil pres-
sure switch
Front oxygen (A/F) sen-
sor signal (+)
Front oxygen (A/F) sen-
sor signal (−)
Front oxygen (A/F) sen-
sor shield
SSM/GST communica-
tion line
GND (sensors)
GND (injectors)
GND (ignition system)
GND (power supply)
GND (control systems)
GND (oxygen sensor
heater 1)
GND (oxygen sensor
heater 2)
Differential pressure
sensor signal
Relief valve control
solenoid valve 2 signal
Relief valve control
solenoid valve 1 signal
Exhaust valve control
solenoid valve (nega-
tive pressure) signal
Exhaust valve control
solenoid valve (positive
pressure) signal
Intake air valve control
solenoid valve signal
Exhaust valve control
duty solenoid valve
Con-
Termi-
nector
Ignition SW ON
nal No.
No.
(Engine OFF)
B135 8 1.7 — 2.4
B135 9
B135 19
B134 17
OFF: 10 — 13
B134 9
OFF: 10 — 13
B134 3
OFF: 10 — 13
B135 24 10 — 13
B137 19 2.8 — 3.2
B137 29 2.4 — 2.7
B137 18
Less than 1 ←→ More
B134 21
B135 19
B136 8
B136 18
B136 17
B134 22
B134 7
B134 15
B137 9
B137 8
B135 15
B136 11 10 — 13
B136 12 10 — 13
B136 3 10 — 13
B136 1 10 — 13
B137 12 10 — 13
B137 11 10 — 13
EN(H4DOSTC)-22
Signal (V)
Engine ON (Idling)
1.1 — 1.6
5
0
ON: 0 ON: 0
OFF: 13 — 14
ON: 0 ON: 0
OFF: 13 — 14
ON: 0 ON: 0
OFF: 13 — 14
ON: 0
OFF: 13 — 14
2.8 — 3.2
2.4 — 2.7
0
Less than 1 ←→ More
than 4 than 4
0
0
0
0
0
0
0
0
0
2
13 — 14
13 — 14
13 — 14
13 — 14
13 — 14
13 — 14
5
0
0
0
0
0
0
0
0
0
0
0
2
Note
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