Subaru Legacy (2005 year). Service manual — part 312
EN(H4DOTC)(diag)-17
ENGINE (DIAGNOSTICS)
Engine Control Module (ECM) I/O Signal
GND (front oxygen (A/F)
sensor heater 1)
B134
7
0
0
—
GND (front oxygen (A/F)
sensor heater 2)
B134
6
0
0
—
Intake camshaft position
sensor (LH)
B135
8
0 or 5
0 or 5
Waveform
Intake camshaft position
sensor (RH)
B135
9
0 or 5
0 or 5
Waveform
Electronic
throttle control
Main
B136
18
0.64 — 0.72
Fully opened: 3.96
0.64 — 0.72
(After engine is
warmed-up.)
Fully closed: 0.6 Fully
opened: 3.96
Sub
B136
29
1.51 — 1.58
Fully opened: 4.17
1.51 — 1.58
(After engine is
warmed-up.)
Fully closed: 1.48 Fully
opened: 4.17
Power
supply
B136
16
5
5
—
Ground
(sensor)
B136
35
0
0
—
Electronic throttle control
motor (+)
B137
5
Duty waveform
Duty waveform
Drive frequency: 500 Hz
Electronic throttle control
motor (
−)
B137
4
Duty waveform
Duty waveform
Drive frequency: 500 Hz
Electronic throttle control
motor power supply
B137
6
10 — 13
13 — 14
—
Electronic throttle control
motor relay
B135
35
ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14
When ignition switch is
turned to ON: ON
Intake AVCS
solenoid (LH)
Signal (+)
B134
19
ON: 10 — 13
OFF: 0
ON: 13 — 14
OFF: 0
—
Signal (
−)
B134
29
0
0
—
Intake AVCS
solenoid (RH)
Signal (+)
B134
18
ON: 10 — 13
OFF: 0
ON: 13 — 14
OFF: 0
—
Signal (
−)
B134
28
0
0
—
Exhaust AVCS
solenoid (LH)
Signal (+)
B134
21
ON: 10 — 13
OFF: 0
ON: 13 — 14
OFF: 0
—
Signal (
−)
B134
31
0
0
—
Exhaust AVCS
solenoid (RH)
Signal (+)
B134
20
ON: 10 — 13
OFF: 0
ON: 13 — 14
OFF: 0
—
Signal (
−)
B134
30
0
0
—
Exhaust cam-
shaft position
sensor (LH)
Signal (+)
B135
20
0
−7 — +7
Waveform
Signal (
−)
B135
28
0
0
—
Shield
B135
30
0
0
—
Exhaust cam-
shaft position
sensor (RH)
Signal (+)
B135
21
0
−7 — +7
Waveform
Signal (
−)
B135
29
0
0
—
Shield
B135
30
0
0
—
DESCRIPTION
Connector
No.
Termi-
nal
No.
Signal (V)
Reference
Ignition SW ON
(engine OFF)
Engine ON
(idling)
EN(H4DOTC)(diag)-18
ENGINE (DIAGNOSTICS)
Engine Control Module (ECM) I/O Signal
Accelerator
pedal position
sensor
Main
B136
17
Fully closed: 1
Fully opened: 3.3
Fully closed: 1
Fully opened: 3.3
—
Power
supply
B136
15
5
5
—
Ground
(sensor)
B136
34
0
0
—
Sub
B136
28
Fully closed: 1
Fully opened: 3.3
Fully closed: 1
Fully opened: 3.3
—
Shield
B137
2
0
0
—
Power
supply
B136
16
5
5
—
Ground
(sensor)
B136
35
0
0
—
Starter relay
B135
32
ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14
ON: Cranking
A/C middle pressure switch
B136
30
ON: 0
OFF: 10 — 13
ON: 0
OFF: 13 — 14
—
Clutch switch
B134
1
When clutch pedal is
depressed: 0
When clutch pedal is
released: 10 — 13
When clutch pedal is
depressed: 0
When clutch pedal is
released: 13 — 14
—
Brake switch 1
B136
9
When brake pedal is
depressed: 0
When brake pedal is
released: 10 — 13
When brake pedal is
depressed: 0
When brake pedal is
released: 13 — 14
—
Brake switch 2
B136
8
When brake pedal is
depressed: 10 — 13
When brake pedal is
released: 0
When brake pedal is
depressed: 13 — 14
When brake pedal is
released: 0
—
Cruise control command
switch
B136
11
When operating noth-
ing: 3.5 — 4.5
When operating RES/
ACC:
2.5 — 3.5
When operating SET/
COAST: 0.5 — 1.5
When operating CAN-
CEL:
0 — 0.5
When operating
nothing: 3.5 — 4.5
When operating
RES/ACC:
2.5 — 3.5
When operating
SET/COAST:
0.5 — 1.5
When operating
CANCEL:
0 — 0.5
—
Cruise control main switch
B136
7
ON: 0
OFF: 5
ON: 0
OFF: 5
—
DESCRIPTION
Connector
No.
Termi-
nal
No.
Signal (V)
Reference
Ignition SW ON
(engine OFF)
Engine ON
(idling)
EN(H4DOTC)(diag)-19
ENGINE (DIAGNOSTICS)
Engine Condition Data
6. Engine Condition Data
A: ELECTRICAL SPECIFICATION
Measuring condition:
• After engine is warmed-up.
• Gear position is in neutral.
• Turn the A/C to OFF.
• Turn all the accessory switches to OFF.
Remarks
Specifications
Engine load
1.2 — 2.9 (%): Idling
4.7 — 12.8 (%): 2,500 rpm racing
EN(H4DOTC)(diag)-20
ENGINE (DIAGNOSTICS)
Data Link Connector
7. Data Link Connector
A: NOTE
This connector is used for connecting the Subaru Select Monitor.
CAUTION:
Do not connect any scan tools except Subaru Select Monitor or general scan tool because the circuit
for Subaru Select Monitor may be damaged.
EN-00037
1
2
3
4
5
7
6
8
9 10 11 12 13
15
14
16
Terminal No.
Remarks
Terminal No.
Remarks
1
Power supply
9
Empty
2
Empty
10
Subaru Select Monitor signal
3
Empty
11
Empty
4
Empty
12
Ground
5
Empty
13
Ground
6
Line end check signal 1
14
Empty
7
Empty
15
Empty
8
Empty
16
Empty
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