Subaru Impreza 2004 - Engine Control Module (ECM) I;O Signal

EN(H4SO)(diag)-23
ENGINE (DIAGNOSTICS)
Engine Control Module (ECM) I/O Signal
5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
Content
Connector
No.
Terminal
No.
Signal (V)
Note
Ignition SW ON
(Engine OFF)
Engine ON (Idling)
Crank-
shaft posi-
tion sensor
Signal (+) B135 6 5* 0 −7 to +7 Sensor output waveform
Signal (−)B135 17 0 0 —
Shield B135 28 0 0 —
Camshaft
position
sensor
Signal (+) B135 7 6* 0 −7 to +7 Sensor output waveform
Signal (−)B135 18 0 0 —
Shield B135 28 0 0 —
Throttle
position
sensor
Signal B135 13
Fully closed: 0.2 — 1.0
Fully opened: 4.2 — 4.7
—
Power
supply
B135 3 5 5 —
GND
(sensor)
B135 19 0 0 —
Rear oxy-
gen sen-
sor
Signal B135 14 0 0 — 0.9 —
Shield B137 15 0 0 —
GND
(sensor)
B135 19 0 0 —
Front oxy-
gen (A/F)
sensor
heater
Signal 1 B136 6 10, or more 0 — 14 —
Signal 2 B136 17 10, or more 0 — 1.0 —
Rear oxygen sensor
heater signal
B136 4 0 — 1.0 0 — 1.0 —
Engine
coolant
tempera-
ture sen-
sor
Signal B135 12 0.8 — 1.4 0.8 — 1.4 After warm-up the engine.
GND
(sensor)
B135 19 0 0 After warm-up the engine.
Vehicle speed signal B137 10 0 or 5 0 or 5
“5” and “0” are repeatedly dis-
played when vehicle is driven.
Starter switch B136 20 0 0 Cranking: 8 — 14
EN-00258
B135
B134
B137
B136
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20
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To
To
To
To