Subaru Impreza 2003, Service Manual

Page: 1200 / 3610

EN(H4DOTC)-24
ENGINE (DIAGNOSTICS)
ENGINE CONTROL MODULE (ECM) I/O SIGNAL
Generator signal B84 11
ON: 1, or less
OFF: 10 — 13
ON: 1, or less
OFF: 10 — 13
Waveform
Mass air
flow sen-
sor
Signal B136 13 — 0.3 — 4.5 —
Shield B136 8 0 0 —
GND B136 7 0 0 —
Intake air temperature
sensor signal
B135 27 — — —
Exhaust
gas tem-
perature
sensor Signal B135 16 — — —
GND
(sensor)
B135 19 0 0 —
Tumble
generator
valve posi-
tion sensor
RH
Signal B135 23
Fully closed: 0.2 — 1.0
Fully opened: 4.2 — 4.7
—
Power
supply
B135 9 5 5 —
GND
(sensor)
B135 19 0 0 —
Tumble
generator
valve posi-
tion sensor
LH
Signal B135 13
Fully closed: 0.2 — 1.0
Fully opened: 4.2 — 4.7
—
Power
supply
B135 9 5 5 —
GND
(sensor)
B135 19 0 0 —
Tumble generator valve
RH (open)
B136 4 0 or 5 0 or 5 —
Tumble generator valve
RH (close)
B136 5 0 or 5 0 or 5 —
Tumble generator valve
LH (open)
B136 10 0 or 5 0 or 5 —
Tumble generator valve
LH (close)
B136 11 0 or 5 0 or 5 —
Wastegate control sole-
noid valve
B84 24 10 — 13 13 — 14 —
Starter switch B134 16 0 0 Cranking: 8 — 14
A/C switch B134 6
ON: 10 — 13
OFF: 0
ON: 13 — 14
OFF: 0
—
Ignition switch B134 14 10 — 13 13 — 14 —
Neutral position switch B134 8
ON: 12
±
0.5
OFF: 0
Switch is ON when gear is in
neutral position.
Test mode connector B134 5 5 5 When connected: 0
Knock
sensor
Signal B135 4 2.8 2.8 —
Shield B135 22 0 0 —
Back-up power supply B84 10 10 — 13 13 — 14 Ignition switch “OFF”: 10 — 13
Control unit power sup-
ply
B84 2 10 — 13 13 — 14 —
B84 3 10 — 13 13 — 14 —
Sensor power supply B135 9 5 5 —
Line end check 1 B134 10 0 0 —
Ignition
control
#1 B137 24 0 13 — 14 Waveform
#2 B137 23 0 13 — 14 Waveform
#3 B137 22 0 13 — 14 Waveform
#4 B137 21 0 13 — 14 Waveform
Content
Con-
nector
No.
Termi-
nal No.
Signal (V)
Note
Ignition SW ON
(Engine OFF)
Engine ON (Idling)