Subaru 2009 IMPREZA Service Manual page 435

ENGINE (DIAGNOSTICS)
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
position Signal (–)
sensor
Shield
Signal (+)
Camshaft
position Signal (–)
sensor
Shield
Main
Electronic
Sub
throttle control
Power supply
Ground
(sensor)
Electronic throttle control
motor (+)
Electronic throttle control
motor (–)
Electronic throttle control
motor power supply
Electronic throttle control
motor relay
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
B134 12
B134 22
B134 24
B134 18
Fully opened: 3.96
B134 28
Fully opened: 4.17
B134 19
B134 29
B137 5
B137 4
B136 1
B136 21
EN(H4SO)(diag)-18
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
35 34 33 32 31 30 29
Signal (V)
Ignition SW ON Engine ON
(engine OFF)
0 –7 — +7
0
0
0 –7 — +7
0
0
0.64 — 0.72
0.64 — 0.72
(After engine is
warmed up.)
1.51 — 1.58
1.51 — 1.58
(After engine is
warmed up.)
5
0
Duty waveform Duty waveform
Duty waveform Duty waveform
10 — 13 12 — 14
ON: 0
OFF: 10 — 13 OFF: 12 — 14
B137
TO D:
7 6 5 4 3
17 16 15 14 13 12 11 10
17 25 24 23 22 21 20
28 31 30 29 28
Note
(idling)
Waveform
0 —
0 —
Waveform
0 —
0 —
Fully closed: 0.6
Fully opened: 3.96
Fully closed: 1.48
Fully opened: 4.17
5 —
0 —
Drive frequency: 500 Hz
Drive frequency: 500 Hz
—
ON: 0 When ignition switch is
turned to ON: ON
2 1
9 8
19 18
27 26
EN-05288