Subaru 2002 IMPREZA Service Manual page 456

ENGINE CONTROL MODULE (ECM) I/O SIGNAL
ENGINE (DIAGNOSTICS)
5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
Content
Signal (+)
Crank-
shaft posi- Signal (−)
tion sensor
Shield
Signal (+)
Camshaft
position Signal (−)
sensor
Shield
Signal
Throttle
Power
position
supply
sensor
GND (sen-
sor)
Signal
Rear oxy-
Shield
gen sen-
GND (sen-
sor
sor)
Front oxy- Signal 1
gen (A/F)
sensor
Signal 2
heater
Rear oxygen sensor
heater signal
Engine Signal
coolant
tempera-
GND (sen-
ture sen-
sor)
sor
Vehicle speed signal
*: With immobilizer
Con-
Terminal
nector
Ignition SW ON
No.
No.
(Engine OFF)
B135 2* 1
B135 9* 8
B135 10
B135 1* 2
B135 8* 9
B135 10
B136 17
B136 15
B136 16
B136 18
B136 24
B136 16
B134 23
B134 22
B134 21
B136 14
B136 16
B135 24
Signal (V)
Engine ON (Idling)
−7 — +7
0
0
0
−7 — +7
0
0
0
Fully closed: 0.2 — 1.0
Fully opened: 4.2 — 4.7
5
0
0 0 — 0.9
0
0
0 — 1.0 0 — 1.0
0 — 1.0 0 — 1.0
0 — 1.0 0 — 1.0
1.0 — 1.4 1.0 — 1.4
0
0 or 5 0 or 5
EN-24
Note
Sensor output waveform
0
0
Sensor output waveform
0
0
5
0
0
0
After warm-up the engine.
0 After warm-up the engine.
"5" and "0" are repeatedly dis-
played when vehicle is driven.
B2M2267A
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