Engine Control Module (Ecm) I/O Signal - Subaru IMPREZA 2004 Service Manual

5. Engine Control Module (ECM) I/O Signal

A: ELECTRICAL SPECIFICATION
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Content
Signal (+)
Crank-
shaft posi- Signal (−)
tion sensor
Shield
Signal (+)
Camshaft
position Signal (−)
sensor
Shield
Signal
Throttle
Power
position
supply
sensor
GND
(sensor)
Signal
Rear oxy-
Shield
gen sen-
GND
sor
(sensor)
Front oxy- Signal 1
gen (A/F)
sensor
Signal 2
heater
Rear oxygen sensor
heater signal
Engine Signal
coolant
tempera-
GND
ture sen-
(sensor)
sor
Vehicle speed signal
Starter switch
Engine Control Module (ECM) I/O Signal
B134
To
7 6 5 4 3 2 1
22 21 20 19 18 15 9
17 16 14 13 12 11 10
29 28 27
34 33 32 31 30 26 25 24
B136
To
6 5 4 3 2 1
17 16 15 9 8 7
14 13 12 11 10
23 22 21
26 25 24 20 19 18
Connector Terminal
No. No.
B135 6 5*
B135 17
B135 28
B135 7 6*
B135 18
B135 28
B135 13
B135 3
B135 19
B135 14
B137 15
B135 19
B136 6
B136 17
B136 4
B135 12
B135 19
B137 10
B136 20
EN(H4SO)(diag)-23
To
7 6 5 4
19 18 17 16 15
28 27 26
To
4 3
13 12 11
20 19
Signal (V)
Ignition SW ON
Engine ON (Idling)
(Engine OFF)
−7 to +7
0
0
0
−7 to +7
0
0
0
Fully closed: 0.2 — 1.0
Fully opened: 4.2 — 4.7
5
0
0 0 — 0.9
0
0
10, or more 0 — 14
10, or more 0 — 1.0
0 — 1.0 0 — 1.0
0.8 — 1.4 0.8 — 1.4
0
0 or 5 0 or 5
0
ENGINE (DIAGNOSTICS)
B135
3 2 1
14 13 12 11 10 9 8
25 24 23 22 21 20
B137
2 1
10 9 8 7 6 5
18 17 16 15 14
Sensor output waveform
0
0
Sensor output waveform
0
0
5
0
0
0
After warm-up the engine.
0 After warm-up the engine.
"5" and "0" are repeatedly dis-
played when vehicle is driven.
0 Cranking: 8 — 14
EN-00258
Note
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