Subaru 2009 IMPREZA Service Manual page 1238

5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
TO A: B134
7 6 5 4 3 2 1
17 16 15 14 13 12 11 10 9 8
27 26 25 24 23 22 21 20 19 18
34 33 32 31 30 29 28
Contents
Signal (+)
Crankshaft
Signal (–)
position sensor
Shield
Signal
Rear oxygen Shield
sensor
Ground
(sensor)
Signal 1
Front oxygen (A/F)
sensor heater
Signal 2
Rear oxygen sensor heater signal
Signal
Engine coolant
temperature
Ground
sensor
(sensor)
Signal
Air flow sensor Shield
Ground
Intake air temperature sensor
signal
Wastegate control solenoid valve
Starter switch
A/C switch
Ignition switch
Neutral position switch
Delivery (test) mode connector
Signal
Knock sensor
Shield
Engine Control Module (ECM) I/O Signal
B135
TO B:
7 6 5 4 3 2 1
19 18 17 16 15 14 13 12 11 10 9 8
27 26 25 24 23 22 21 20
35 34 33 32 31 30 29 28
Connector Terminal
No. No.
B134 13
B134 14
B134 24
B135 4
B135 1
B135 30
B136 3
B136 2
B136 4
B134 34
B134 29
B135 26
B135 35
B135 34
B135 18
B137 27
B136 32
B136 24
B135 19
B136 31
B135 27
B134 15
B134 25
EN(H4DOTC)(diag)-17
B136
TO C:
6 5 4 3 2 1
16 15 14 13 12 11 10 9 8 7
27 26 25 24 23 22 21 20 19 18 17
35 34 33 32 31 30 29 28
Signal (V)
Ignition SW ON Engine ON
(engine OFF)
0 –7 — +7
0
0
0 0 — 0.9
0
0
—
—
0 — 13 12 — 14
1.0 — 1.4 1.0 — 1.4
0
— 0.3 — 4.5
0
0
0.3 — 4.6 0.3 — 4.6
0 or 10 — 13 0 or 12 — 14
0
ON: 10 — 13 ON: 12 — 14
OFF: 0 OFF: 0
10 — 13 12 — 14
ON: 0
OFF: 10 — 13 OFF: 12 — 14
10 — 13 13 — 14
2.8
0
ENGINE (DIAGNOSTICS)
B137
TO D:
7 6 5 4 3 2
17 16 15 14 13 12 11 10 9
25 24 23 22 21 20 19
31 30 29 28 27
Note
(idling)
Waveform
0 —
0 —
—
0 —
0 —
— Waveform
— Waveform
Waveform
After engine is
warmed up.
After engine is
0
warmed up.
—
0 —
0 —
—
Waveform
0 Cranking: 8 — 14
—
—
ON: 0
—
When connected: 0
2.8 —
0 —
1
8
18
26
EN-05288