Subaru Legacy 2004 Service Manual page 450

ENGINE (DIAGNOSTICS)
DESCRIPTION
Electronic throttle control
motor 2 (")
Electronic throttle control
motor 1 power supply
Electronic throttle control
motor 2 power supply
Electronic throttle control
motor relay
Main
Power
Accelerator
supply
position sen-
sor
Ground
Sub
Signal
Rear oxygen
sensor
Shield
Front oxygen Signal 1
(A/F) sensor
Signal 2
heater
Rear oxygen sensor heater
signal
Engine coolant temperature
sensor
Starter switch
A/C switch
Ignition switch
Neutral position switch
(AT model)
Neutral position switch
(MT model)
Test mode connector
Signal
Knock sensor
Shield
Back-up power supply
Control module power sup-
ply
Sensor power supply 1
Sensor power supply 2
1
Ignition control
2
#1
#2
Fuel injector
#3
#4
Fuel pump relay control
(Model with immobilizer)
Fuel pump relay control
(Model without immobilizer)
Engine Control Module (ECM) I/O Signal
Connector Terminal
No. No.
B137 5
B137 6
B137 7
B137 9
Fully closed: 0.5 — 1.5
B137 29
Fully opens: 3 — 5
B137 25
B137 31
Fully closed: 0.5 — 1.5
B137 30
Fully opens: 3 — 5
B136 19
B136 30
B135 2
B135 3
B134 1
B136 22
B135 23
B135 20
B135 13
B135 12
B135 12
B135 24
B136 23
B136 12
B136 7
B136 3
B136 4
B136 17
B137 25
B134 23
B134 24
B134 17
B134 27
B134 34
B134 33
B135 44
B134 27
EN(H4SO 2.0)(diag)-18
Signal (V)
Ignition SW ON Engine ON
(engine OFF)
Duty waveform Duty waveform
10 — 13
10 — 13
ON: 0
OFF: 10 — 13 OFF: 13 — 14
Fully closed: 0.5 — 1.5
Fully opens: 3 — 5
5
0
Fully closed: 0.5 — 1.5
Fully opens: 3 — 5
0
0
0 — 1.0
0 — 1.0
0 — 1.0
1.0 — 1.6
OFF: 0
ON: 10 — 13 ON: 13 — 14
ON: 10 — 13 ON: 13 — 14
OFF: 0
10 — 13
ON: 0
OFF: 10 — 14
ON: 10 — 14
OFF: 0
5
2.8
0
10 — 13
10 — 13
10 — 13
5
5
0
0
10 — 13
10 — 13
10 — 13
10 — 13
0.5 or less
0.5 or less
(idling)
Drive frequency: 1 kHz
13 — 14
13 — 14
ON: 0 When ignition switch is
turned to ON: ON
5
0
0 — 0.9
0
13 — 14
13 — 14
13 — 14
After engine is
1.0 — 1.6
warmed-up.
OFF: 0
OFF: 0
13 — 14
5 When connected: 0
2.8
0
Ignition switch "OFF":
13 — 14
10 — 13
13 — 14
13 — 14
5
5
1 — 3.4 Waveform
1 — 3.4 Waveform
1 — 14 Waveform
1 — 14 Waveform
1 — 14 Waveform
1 — 14 Waveform
0.5 or less
0.5 or less
NOTE
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