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

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

A: ELECTRICAL SPECIFICATION
To B134
7 6 5 4 3 2 1
17 16 15 14 13 12 11 10 9
27 26 25 24 23 22 21 20 19
34 33 32 31 30 29
DESCRIPTION
Signal (+)
Crank-
shaft posi- Signal (−)
tion sensor
Shield
Signal
Rear oxy- Shield
gen sensor
GND
(sensors)
Front oxy- Signal 1
gen (A/F)
sensor
Signal 2
heater
Rear oxygen sensor
heater signal
Engine Signal
coolant
tempera-
GND
ture sen-
(sensors)
sor
Vehicle speed signal
Signal
Air flow
Shield
sensor
GND
Intake air temperature
sensor signal
Exhaust Signal
gas tem-
GND
perature
(sensors)
sensor
Engine Control Module (ECM) I/O Signal
To B135
7 6 5 4 3
19 18 17 16 15 14 13 12 11
8
27 26 25 24 23
18
28 35 34 33 32 31
Connector No. Terminal No.
B135 10
B135 22
B135 31
B137 25
B137 31
B136 35
B134 3
B134 2
B135 2
B136 14
B136 35
B135 26
B136 23
B136 32
B136 31
B136 13
B136 24
B136 35
EN(H4DOTC 2.5)-17
To B136
2 1
6 5 4 3
10
9 8 16 15 14 13 12 11 10
22 21 20
27 26 25 24 23 22 21
30 29 28 35 34 33 32 31
Signal (V)
Ignition SW ON Engine ON
(engine OFF)
−7 — +7
0
0
0
0
0
0
0 — 1.0
0 — 1.0
0 — 1.0
1.0 — 1.4 1.0 — 1.4
0
0 or 5
— 0.3 — 4.5
0
0
0.3 — 4.6 0.3 — 4.6
—
0
ENGINE (DIAGNOSTIC)
To
2 1 7 6 5
17 16 15 14 13
9 8 7
25 24 23
20 19 18 17
30 29 28
31 30 29
NOTE
(Idling)
Waveform
0
0
0 — 0.9
0
0
— Waveform
— Waveform
— Waveform
After engine is warmed-up.
0 After engine is warmed-up.
"5" and "0" are repeatedly dis-
0 or 5
played when vehicle is driven.
0
0
—
0
B137
4 3 2 1
12 11 10
9 8
22 21 20 19 18
28 27 26
EN-01812
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