Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2004 WRX STi 02. ENGINE SECTION (STi) 11. ENGINE (DIAGNOSTICS) 05. Engine Control Module (ECM) I-O Signal
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ENGINE CONTROL MODULE (ECM) I/O SIGNAL
ENGINE (DIAGNOSTICS)
5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION
To B134 To B135 To B136 To B137
7 6 5 4 3 2 1 7 6 5 4 3 2 1 6 5 4 3 2 1 7 6 5 4 3 2 1
17 16 15 14 13 12 11 10 9 8 19 18 17 16 15 14 13 12 11 10 9 8 16 15 14 13 12 11 10 9 8 7 17 16 15 14 13 12 11 10 9 8
27 26 25 24 23 22 21 20 19 18 27 26 25 24 23 22 21 20 27 26 25 24 23 22 21 20 19 18 17 25 24 23 22 21 20 19 18
34 33 32 31 30 29 28 35 34 33 32 31 30 29 28 35 34 33 32 31 30 29 28 31 30 29 28 27 26
EN-01812
Con- Signal (V)
Termi-
Content nector Ignition SW ON Note
nal No. Engine ON (Idling)
No. (Engine OFF)
Crank- Signal (+) B135 10 0 -7 -- +7 Sensor output waveform
shaft posi- Signal (-) B135 22 0 0 --
tion sensor Shield B135 31 0 0 --
Signal B137 25 0 0 -- 0.9 --
Rear oxy-
Shield B137 31 0 0 --
gen sen-
sor GND (sen-
B136 35 0 0 --
sor)
Front oxy- Signal 1 B134 3 0 -- 1.0 -- Sensor output waveform
gen (A/F)
sensor Signal 2 B134 2 0 -- 1.0 -- Sensor output waveform
heater
Rear oxygen sensor
B135 2 0 -- 1.0 -- Sensor output waveform
heater signal
Engine Signal B136 14 1.0 -- 1.4 1.0 -- 1.4 After warm-up the engine.
coolant
tempera- GND (sen-
ture sen- B136 35 0 0 After warm-up the engine.
sor)
sor
"5" and "0" are repeatedly dis-
Vehicle speed signal B135 27 0 or 5 0 or 5
played when vehicle is driven.
Mass air Signal B136 23 -- 0.3 -- 4.5 --
flow sen- Shield B136 32 0 0 --
sor GND B136 31 0 0 --
Intake air temperature
B136 13 0.3 -- 4.6 0.3 -- 4.6 --
sensor signal
EN(STi)-18
ENGINE CONTROL MODULE (ECM) I/O SIGNAL
ENGINE (DIAGNOSTICS)
Con- Signal (V)
Termi-
Content nector Ignition SW ON Note
nal No. Engine ON (Idling)
No. (Engine OFF)
Fully closed: 3.8 -- 4.9
Tumble Signal B136 27 --
Fully opened: 0.2 -- 0.9
generator
Power
valve posi- B136 16 5 5 --
supply
tion sensor
RH GND
B136 35 0 0 --
(sensor)
Fully closed: 3.8 -- 4.9
Tumble Signal B136 26 --
Fully opened: 0.2 -- 0.9
generator
Power
valve posi- B136 16 5 5 --
supply
tion sensor
LH GND
B136 35 0 0 --
(sensor)
Tumble generator valve
B134 9 0 or 10 -- 13 0 or 13 -- 14 Sensor output waveform
RH (open)
Tumble generator valve
B134 8 0 or 10 -- 13 0 or 13 -- 14 Sensor output waveform
RH (close)
Tumble generator valve
B134 11 0 or 10 -- 13 0 or 13 -- 14 Sensor output waveform
LH (open)
Tumble generator valve
B134 10 0 or 10 -- 13 0 or 13 -- 14 Sensor output waveform
LH (close)
Wastegate control sole-
B134 32 0 or 10 -- 13 0 or 13 -- 14 Sensor output waveform
noid valve
Starter switch B137 8 0 0 Cranking: 8 -- 14
ON: 10 -- 13 ON: 13 -- 14
A/C switch B137 16 --
OFF: 0 OFF: 0
Ignition switch B137 15 10 -- 13 13 -- 14 --
ON: 10 -- 13 ON: 13 -- 14
Neutral position switch B137 9 --
OFF: 0 OFF: 0
Test mode connector B137 14 5 5 When connected: 0
Knock Signal B136 25 2.8 2.8 --
sensor Shield B136 33 0 0 --
Back-up power supply B135 19 10 -- 13 13 -- 14 Ignition switch "OFF": 10 -- 13
Control unit power sup- B135 5 10 -- 13 13 -- 14 --
ply B135 6 10 -- 13 13 -- 14 --
Sensor power supply B136 16 5 5 --
#1 B135 18 0 13 -- 14 Waveform
Ignition #2 B135 17 0 13 -- 14 Waveform
control #3 B135 16 0 13 -- 14 Waveform
#4 B135 16 0 13 -- 14 Waveform
#1 B136 6 10 -- 13 1 -- 14 Waveform
Fuel injec- #2 B136 5 10 -- 13 1 -- 14 Waveform
tor #3 B136 4 10 -- 13 1 -- 14 Waveform
#4 B136 3 10 -- 13 1 -- 14 Waveform
Fuel pump Signal 1 B135 26 0 or 5 0 or 5 Sensor output waveform
control unit Signal 2 B137 28 10 -- 13 13 -- 14 --
ON: 0.5 or less ON: 0.5 or less
A/C relay control B133 33 --
OFF: 10 -- 13 OFF: 13 -- 14
Radiator fan relay 1 ON: 0.5 or less ON: 0.5 or less
B135 25 --
control OFF: 10 -- 13 OFF: 13 -- 14
Radiator fan relay 2 ON: 0.5 or less ON: 0.5 or less
B135 24 Model with A/C only
control OFF: 10 -- 13 OFF: 13 -- 14
EN(STi)-19
ENGINE CONTROL MODULE (ECM) I/O SIGNAL
ENGINE (DIAGNOSTICS)
Con- Signal (V)
Termi-
Content nector Ignition SW ON Note
nal No. Engine ON (Idling)
No. (Engine OFF)
Malfunction indicator Light "ON": 1 or less
B134 17 -- --
lamp Light "OFF": 10 -- 14
Engine speed output B134 23 -- 0 -- 13 or more Waveform
Purge control solenoid ON: 1 or less ON: 1 or less
B134 14 Sensor output waveform
valve OFF: 10 -- 13 OFF: 13 -- 14
Signal B136 22 1.7 -- 2.4 1.1 -- 1.6
Manifold
Power
absolute B136 16 5 5
supply --
pressure
sensor GND (sen-
B136 35 0 0
sor)
The valve operates when fuel
Fuel tank Signal B136 21 2.3 -- 2.7 2.3 -- 2.7 filler cap is removed and rein-
pressure stalled.
sensor GND (sen-
B136 35 0 0 --
sor)
Fuel tank pressure con- ON: 1 or less ON: 1 or less
B134 12 --
trol solenoid valve OFF: 10 -- 13 OFF: 13 -- 14
ON: 1 or less ON: 1 or less
Drain valve B134 13 --
OFF: 10 -- 13 OFF: 13 -- 14
Fuel tank sensor control ON: 1 or less ON: 1 or less
B134 24 --
valve OFF: 10 -- 13 OFF: 13 -- 14
Fuel level sensor B136 20 0.12 -- 4.75 0.12 -- 4.75 --
Fuel temperature sen- Ambient temperature:
B136 12 2.5 -- 3.8 2.5 -- 3.8
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