Subaru Impreza 2003, Service Manual

Page: 796 / 3610

EN(H4SOw/oOBD)-20
ENGINE (DIAGNOSTICS)
ENGINE CONTROL MODULE (ECM) I/O SIGNAL
*: With immobilizer
Content
Connec-
tor No.
Terminal
No.
Signal (V)
Note Ignition SW
Engine ON (Idling)
ON (Engine OFF)
Idle air con-
trol sole-
noid valve
Signal 1 B134 5 — 1 — 13 Waveform
Signal 2 B134 6 — 1 — 13 Waveform
Signal 3 B134 19 — 1 — 13 Waveform
Signal 4 B134 20 — 1 — 13 Waveform
Torque control signal 1 B135 16 5 5 —
Torque control signal 2 B135 17 5 5 —
Fuel pump relay control B134 29* 16
ON: 0
OFF: 10 — 13
0 —
A/C relay control B134 17
ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14
—
Radiator fan relay 1 con-
trol
B134 3
ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14
—
Radiator fan relay 2 con-
trol
B134 12
ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14
—
Self-shutoff control B135 19 10 — 13 13 — 14 —
Malfunction indicator
light
B134 11 — —
Light “ON”: 1, max.
Light “OFF”: 10 — 14
Engine speed output B134 30 — 0 — 13, min. Waveform
Knock sen-
sor Signal B136 4 2.8 2.8 —
Shield B136 25 0 0 —
Manifold
absolute
pressure
sensor Signal
B136
5 3.4 — 3.6 1.2 — 1.8 —
Power
supply
15 5 5 —
GND 16 0 0 —
Purge control solenoid
valve
B134 2
ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14
—
GND (sensors) B136 16 0 0 —
GND (injectors) B134 7 0 0 —
GND (ignition system) B134 27 0 0 —
GND (power supply) B134 8 0 0 —
GND (control systems)
B136 21 0 0 —
B136 22 0 0 —
Select monitor signal B135
11 — — —
12 — — —
Power steering switch B135 13
ON: 0
OFF: 10 — 13
ON: 0
OFF: 10 — 13
—
Torque control cut signal B134 31 8 8 —
AT load signal B136 11 0 — 0.3 0.8 — 1.2 —
MT/AT identification B135 25
MT: 0
AT: 5
MT: 0
AT: 5
—