Subaru Impreza 2003 Service Manual page 794

ENGINE CONTROL MODULE (ECM) I/O SIGNAL
ENGINE (DIAGNOSTICS)
5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
8 7 6 5
23 22 21 20 19
35 34 33 32
Content
Signal (+)
Crankshaft
position Signal (−)
sensor
Shield
Signal (+)
Camshaft
position Signal (−)
sensor
Shield
Intake air
tempera- Signal
ture sensor
Signal
Throttle
position Power
sensor supply
GND
Signal
Oxygen
sensor
Shield
Engine cool- Signal
ant temper-
GND
ature sensor
Vehicle speed sensor
Starter switch
A/C switch
Ignition switch
Neutral position switch
(MT)
Park/Neutral position
switch (AT)
B134
To:
4 3 2 1
18 17 16 15 14 13 12 11 10 9 19
31 30 29 28 27 26 25 24
28
Connec- Terminal
tor No. No.
ON (Engine OFF)
B135 *2 1
B135 8
B135 10
B135 *1 2
B135 8
B135 10
B136 13
B136 17
B136 15
B136 16
B136 7
B136 23
B136 14
B136 16
B135 24
B135 28
B135 27
B135 7
B135 26
B135 26
EN(H4SOw/oOBD)-18
B135
To:
7 6 5 4 3 2 1
18 17 16 15 14 13 12 11 10 9 8
27 26 25 24 23 22 21 20
Signal (V)
Ignition SW
Engine ON
(Idling)
±6
0
0 0
0 0
±6
0
0 0
0 0
2.3 — 2.5 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 0.6 — 1.0
0 0
0 or 5 0 or 5
0 0
ON: 10 — 13 ON: 13 — 14
OFF: 0 OFF: 0
10 — 13 13 — 14
ON: 5
OFF: 0
ON: 0
OFF: 5
B136
To:
7 6 5 4 3 2 1
20 19 18 17 16 15 14 13 12 11 10 9 8
30 29 28 27 26 25 24 23 22 21
Note
Sensor output waveform
—
—
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 neutral
position.
Switch is ON when shift lever is in
"P" or "N" position.
EN-01540