1995 SUBARU LEGACY Service Repair Manual

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Page 1273 of 2248

SUBARU LEGACY 1995 Service Repair Manual 5. Specified Data
1. ENGINE CONTROL MODULE (ECM) I/O SIGNAL
OBD0092A
ContentConnector
No.Terminal
No.Signal (V)
Note Ignition SW
Engine ON (Idling)
ON (Engine OFF)
Crankshaft
position
sensorSignal (+)

Page 1274 of 2248

SUBARU LEGACY 1995 Service Repair Manual ContentConnector
No.Terminal
No.Signal (V)
Note Ignition SW
Engine ON (Idling)
ON (Engine OFF)
Starter switch B84 81 0 0 Cranking: 8 to 14
A/C switch B84 80ON: 10—13
OFF: 0ON: 13—14
OFF: 0—
Igni

Page 1275 of 2248

SUBARU LEGACY 1995 Service Repair Manual ContentConnector
No.Terminal
No.Signal (V)
Note Ignition SW
Engine ON (Idling)
ON (Engine OFF)
Knock
sensorSignal B84 30 2.8 2.8—
Shield B84 56 0 0—
AT/MT identification B84 50(AT) 5
(MT) 0(AT) 5

ContentConnector
No.Terminal
No.Signal (V)
Note Ignition SW
Engine ON (Idling)
ON (Engine OFF)
Knock
sensorSignal B84 30 2.8 2.8—
Shield B84 56 0 0—
AT/MT identification B84 50(AT) 5
(MT) 0(AT) 5
(MT) 0When measuring voltage
between ECM and body.
Back-up power supply B84 42 10—13 13—14 Ignition switch“OFF”:10—13
Control unit power
supplyB8415
10—13 13—14—
16
Ignition
control#1,#2 B84 14 0 1—3.4—
#3,#4 B84 13 0 1—3.4—
Fuel
injector# 1 B84 2 10—13 1—14 Waveform
# 2 B84 1 10—13 1—14 Waveform
# 3 B84 18 10—13 1—14 Waveform
# 4 B84 17 10—13 1—14 Waveform
Idle air
control
solenoid
valveOPEN end B84 12—1—13 Waveform
CLOSE
endB84 11—13—1 Waveform
Fuel pump relay
controlB84 84ON: 0.5, or less
OFF: 10—130.5, or less—
A/C relay control B84 85ON: 0.5, or less
OFF: 10—13ON: 0.5, or less
OFF: 13—14—
Radiator fan relay 1
controlB8477
ON: 0.5, or less
OFF: 10—13ON: 0.5, or less
OFF: 13—14—
88
Radiator fan relay 2
controlB84 61ON: 0.5, or less
OFF: 10—13ON: 0.5, or less
OFF: 13—14With A/C vehicles only
Self-shutoff control B84 86 10—13 13—14—
Malfunction indicator
lampB84 31——Light“ON”: 1, or less
Light“OFF”:10—14
Engine speed output B84 33—0—13, or more Waveform
Torque control signal B84 49 5 5—
Torque control cut
signalB84 36 8 8—
Mass air flow signal for
ATB84 35 0—0.3 0.8—1.2—
Purge control solenoid
valveB84 59ON: 1, or less
OFF: 10—13ON: 1, or less
OFF: 13—14—
Atmospheric pressure
sensorB84 23 3.9—4.1 2.0—2.3—
Pressure sources
switching solenoid
valveB84 58ON: 1, or less
OFF: 10—13ON: 1, or less
OFF: 13—14—
EGR solenoid valve B84 60ON: 1, or less
OFF: 10—13ON: 1, or less
OFF: 13—14—
Front oxygen sensor
heater signalB84 44 0—1.0 0—1.0—
Rear oxygen sensor
heater signalB84 43 0—1.0 0—1.0—
TCS signal B84 34 0—70—7 Waveform
AT diagnosis input
signalB84 48Less than 1)More
than 4Less than 1)More
than 4Waveform
GND (sensors) B84 25 0 0—
69
2-7ON-BOARD DIAGNOSTICS II SYSTEM
5. Specified Data

Page 1276 of 2248

SUBARU LEGACY 1995 Service Repair Manual ContentConnector
No.Terminal
No.Signal (V)
Note Ignition SW
Engine ON (Idling)
ON (Engine OFF)
GND (injectors) B8471
00—
72
GND (ignition system) B84 69 0 0—
GND (power supply) B8495
00—
96
GND

Page 1277 of 2248

SUBARU LEGACY 1995 Service Repair Manual 3. TRANSMISSION CONTROL MODULE (TCM) I/O
SIGNAL
OBD0093A
Check with ignition switch ON.
ContentConnector
No.Terminal
No.Measuring conditions Voltage (V)
Back-up power supply B56 14 Ignition switch OFF

Page 1278 of 2248

SUBARU LEGACY 1995 Service Repair Manual ContentConnector
No.Terminal
No.Measuring conditionsVoltage
(V)Resistance to
body
(ohms)
Throttle position
sensorB54 8Throttle fully closed. 0.3—0.7
—
Throttle fully open. 4.3—4.9
Throttle posit

ContentConnector
No.Terminal
No.Measuring conditionsVoltage
(V)Resistance to
body
(ohms)
Throttle position
sensorB54 8Throttle fully closed. 0.3—0.7
—
Throttle fully open. 4.3—4.9
Throttle position
sensor power
supplyB56 19Ignition switch ON (with engine
OFF)4.8—5.3—
ATF temperature
sensorB54 10ATF temperature 20°C(68°F) 2.9—4.0 2.1 k—2.9 k
ATF temperature 80°C (176°F) 1.0—1.4 275—375
Vehicle speed
sensor 1B54 12Vehicle stopped. 0
450—720
Vehicle speed at least 20 km/h (12
MPH)More than 1 (AC range)
Vehicle speed
sensor 2B56 11When vehicle is slowly moved at
least 2 meters (7ft).Less than 1)More than 9—
Engine speed
signalB54 5Ignition switch ON (with engine
OFF).More than 10.5
—
Ignition switch ON (with engine ON). 8—11
Cruise set signal B56 3When cruise control is set (SET
lamp ON).Less than 1
—
When cruise control is not set (SET
lamp OFF).More than 6.5
Torque control
signalB55 16 Ignition switch ON 4—6—
Torque control cut
signalB56 16 Ignition switch ON 6—9—
Mass air flow
signalB54 9 Engine idling after warm-up 0.5—1.2—
Shift solenoid 1 B55 141st or 4th gear More than 9
20—32
2nd or 3rd gear Less than 1
Shift solenoid 2 B55 131st or 2nd gear More than 9
20—32
3rd or 4th gear Less than 1
Shift solenoid 3 B55 15Selector lever in“N”range (with
throttle fully closed).Less than 1
20—32
Selector lever in“D”range (with
throttle fully closed).More than 9
Duty solenoid A B55 8Throttle fully closed (with engine
OFF) after warm-up.1.5—4.0
1.5—4.5
Throttle fully open (with engine
OFF) after warm-up.Less than 0.5
Dropping resistor B55 7Throttle fully closed (with engine
OFF) after warm-up.5—14
12—18
Throttle fully open (with engine
OFF) after warm-up.Less than 0.5
Duty solenoid B B55 5When lock up occurs. More than 8.5
9—17
When lock up is released. Less than 0.5
Duty solenoid C
(AWD model only)B55 3Fuse on FWD switch More than 8.5
9—17 Fuse removed from FWD switch
(with throttle fully open and with
select lever in 1st gear).Less than 0.5
Sensor ground
line 1B54 7—0 Less than 1
Sensor ground
line 2B56 20—0 Less than 1
System ground
lineB56 1—0 Less than 1
Power system
ground lineB55 10—0 Less than 1
FWD switch
(AWD model only)B56 2Fuse removed. 6—9.1
—
Fuse installed. Less than 1
Data link signal
(Subaru select
monitor)B5612——
—
13——
AT diagnosis
signalB56 11 Ignition switch ON Less than 1)More than 4—
72
2-7ON-BOARD DIAGNOSTICS II SYSTEM
5. Specified Data

Page 1279 of 2248

SUBARU LEGACY 1995 Service Repair Manual 6. Wiring Diagram and Wiring Harness
A: WIRING DIAGRAM
1. ENGINE ELECTRICAL SYSTEM
LHD model
BU10-02A
73
2-7ON-BOARD DIAGNOSTICS II SYSTEM
6. Wiring Diagram and Wiring Harness

Page 1280 of 2248

SUBARU LEGACY 1995 Service Repair Manual BU10-02B
74
2-7ON-BOARD DIAGNOSTICS II SYSTEM
6. Wiring Diagram and Wiring Harness

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