Engine Control Module (Ecm) I/O Signal - Subaru Legacy 2002 Service Manual

ENGINE CONTROL MODULE (ECM) I/O SIGNAL

Content
Signal (+)
Crankshaft
position sen- Signal (−)
sor
Shield
Signal (+)
Camshaft
position sen- Signal (−)
sor
Shield
Intake air
temperature Signal
sensor
Signal
Throttle
position sen- Power sup-
sor ply
GND
Signal
Oxygen sen-
sor
Shield
Engine cool-
Signal
ant tempera-
GND
ture sensor
Vehicle speed sensor
Starter switch
A/C switch
Ignition switch
Neutral position switch
(MT)
Park/Neutral position
switch (AT)
Test mode connector
Read memory connector
Back-up power supply
Control unit power supply
# 1, # 2
Ignition con-
trol
# 3, # 4
# 1
# 2
Fuel injector
# 3
# 4
*: With immobilizer
Connec- Terminal
Ignition SW
tor No. No.
ON (Engine OFF)
B135 *2 1
B135 8
B135 10
B135 *1 2
B135 8
B135 10
B136 13 2.3 — 2.5
B136 17
B136 15
B136 16
B136 7
B136 23
B136 14 0.6 — 1.0
B136 16
B135 24
B135 28
ON: 10 — 13
B135 27
B135 7
B135 26
B135 26
B135 14
B135 15
B136 9
1
B136
2
B134 25
B134 26
B134 4
B134 13
B134 14
B134 15
EN(w/oOBD)-21
Signal (V)
Engine ON
(Idling)
±6
0
0 0
0 0
±6
0
0 0
0 0
1.4 — 1.6
Fully closed: 0.5±0.3
Fully opened: 4.3±0.3
5 5
0 0
0
0 0
0.6 — 1.0
0 0
0 or 5 0 or 5
0 0
ON: 13 — 14
OFF: 0 OFF: 0
10 — 13 13 — 14
ON: 5
OFF: 0
ON: 0
OFF: 5
5 5
5 5
10 — 13 13 — 14
10 — 13 13 — 14
0 3.4, max.
0 3.4, max.
10 — 13 13 — 14
10 — 13 13 — 14
10 — 13 13 — 14
10 — 13 13 — 14
Engine (Diagnostics)
Note
Sensor output waveform
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—
Sensor output waveform
—
—
Ambient temperature: 25°C (77°F)
—
—
—
Rich mixture: 0.7
Lean mixture: 0
—
After warm-up
—
"5" and "0" are repeatedly displayed
when vehicle is driven.
Cranking: 10 to 14
—
—
Switch is ON when gear is in neu-
tral position.
Switch is ON when shift lever is in
"P" or "N" position.
When connected: 0
When connected: 0
—
—
—
—
Waveform
Waveform
Waveform
Waveform