Subaru Legacy 2001 Service Manual page 29

ENGINE CONTROL MODULE (ECM) I/O SIGNAL
5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
Content
Signal (+)
Crankshaft
position
sensor
Signal (−)
Shield
Camshaft
Signal (+)
position
sensor
Signal (−)
Signal
Throttle
position
sensor Power supply
GND (sensor)
Signal
Rear oxy-
gen sensor
Shield
LH1
Front oxy-
LH2
gen (A/F)
Signal
sensor
RH1
heater
RH2
Rear oxygen sensor heater signal
Vehicle speed signal
S048526A08
Con-
Termi-
nector
Ignition SW ON
nal No.
No.
(Engine OFF)
B135 2
B135 11
B135 21
B135 1
B135 10
Fully closed: 0.3 —
B135 7
Fully open: 4.2 — 4.7
B135 9
B135 19
B135 17 0 — 0.5
B135 26
B137 7
B137 6
B137 5
B137 4
B136 13
B134 1 0 or 5
EN(H6)-27
S048526
Signal (V)
Engine ON (Idling)
0 —
0 0
0 0
0 —
0 0
0.8 0.3 — 0.8
5 5
0 0
0 — 0.9
0 0
— —
— —
— —
— —
— —
0 or 5
Engine (DIAGNOSTICS)
B2M4398A
Note
Sensor output wave-
form <Ref. to EN(H6)-
31, WAVEFORM,
MEASUREMENT,
Control Module I/O
Signal.>
—
—
Sensor output wave-
form <Ref. to EN(H6)-
31, WAVEFORM,
MEASUREMENT,
Control Module I/O
Signal.>
—
—
—
—
—
—
—
—
—
—
—
"5" and "0" are repeat-
edly displayed when
vehicle is driven.