Subaru Legacy 2004 Service Manual page 774

ENGINE (DIAGNOSTICS)
DESCRIPTION
Front oxygen Signal 1
(A/F) sensor
Signal 2
heater
Rear oxygen sensor heater
signal
Engine coolant temperature
sensor
Tumble generator valve RH
(open)
Tumble generator valve RH
(close)
Tumble generator valve LH
(open)
Tumble generator valve LH
(close)
Tumble generator valve
position sensor RH
Tumble generator valve
position sensor LH
Starter switch
Starter relay
A/C switch (Model with
immobilizer)
A/C switch (Model without
immobilizer)
Ignition switch (Model with
immobilizer)
Ignition switch (Model with-
out immobilizer)
Neutral position switch
Test mode connector
(Model with immobilizer)
Test mode connector
(Model without immobilizer)
Signal
Knock sensor
Shield
Back-up power supply
Control module power sup-
ply
1
Sensor power
supply
2
1
Ignition control
2
#1
#2
Fuel injector
#3
#4
Fuel pump relay control
(Model with immobilizer)
Engine Control Module (ECM) I/O Signal
Termi-
Connector
nal
Ignition SW ON
No.
No.
(engine OFF)
B134 3
B134 2
B135 2
B136 14
B134 19
B134 18
B134 29
B134 28
B136 27
B136 26
B137 8
B135 32
OFF: 10 — 13
ON: 10 — 13
B137 17
ON: 10 — 13
B137 16
B137 14
B137 15
B137 9
B137 15
B137 14
B136 25
B136 33
B135 19
B135 6
B135 5
B136 16
B136 15
B135 18
B135 17
B136 6
B136 5
B136 4
B136 3
ON: 0.5 or less
B135 27
OFF: 10 — 13
EN(H4SO 2.5)(diag)-18
Signal (V)
Engine ON
(idling)
0 — 1.0 0 — 1.0
0 — 1.0 0 — 1.0
0 — 1.0 0 — 1.0
1.0 — 1.4 1.0 — 1.4
0 or 10 — 13 0 or 13 — 14
0 or 10 — 13 0 or 13 — 14
0 or 10 — 13 0 or 13 — 14
0 or 10 — 13 0 or 13 — 14
Fully open: 0.2 — 1.0
Fully closed: 4.2 — 4.7
Fully open: 0.2 — 1.0
Fully closed: 4.2 — 4.7
0
ON: 0
OFF: 13 — 14
ON: 13 — 14
OFF: 0 OFF: 0
ON: 13 — 14
OFF: 0 OFF: 0
10 — 13 13 — 14
10 — 13 13 — 14
ON: 0
OFF: 12#0.5
5
5
2.8
0
10 — 13 13 — 14
10 — 13 13 — 14
10 — 13 13 — 14
5
5
0 1 — 3.4
0 1 — 3.4
10 — 13 1 — 14
10 — 13 1 — 14
10 — 13 1 — 14
10 — 13 1 — 14
0.5 or less
NOTE
After engine is warmed-up.
Sensor output waveform
Sensor output waveform
Sensor output waveform
Sensor output waveform
0 Cranking: 8 — 14
ON: 0
Switch is ON when select
or shift lever is shifted into
"P" or "N" range.
5 When connected: 0
5 When connected: 0
2.8
0
Ignition switch "OFF": 10
— 13
5
5
Waveform
Waveform
Waveform
Waveform
Waveform
Waveform
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