1995 SUBARU LEGACY Contents

2. READ DATA FUNCTION KEY LIST FOR ENGINE
Function mode Contents Abbreviation Unit of measure
F00 ROM ID number YEAR—
F01 Battery voltage VB V
F02 Vehicle speed signal VSP m/h
F03 Vehicle speed signal VSP km/h
F04 Engine speed signal EREV rpm
F05 Engine coolant temperature signal TW°F
F06 Engine coolant temperature signal TW°C
F07 Ignition signal ADVS deg
F08 Mass air flow signal QA V
F09 Load data DATA—
F10 Throttle position signal THV V
F11 Injector pulse width TIM mS
F12 Idle air control signal ISC %
F13 Front oxygen sensor output signal FO2 V
F14 Front oxygen sensor maximum output signal FO2max V
F15 Front oxygen sensor minimum output signal FO2min V
F16 Rear oxygen sensor output signal RO2 V
F17 Rear oxygen sensor maximum output signal RO2max V
F18 Rear oxygen sensor minimum output signal RO2min V
F19 Short term fuel trim ALPHA %
F20 Knock sensor signal RTRD deg
F21 A/F correction (short term trim) by rear oxygen sensor PHOS %
F23 Atmospheric absolute pressure signal (AT vehicles) BARO. P V
F24 Intake manifold absolute pressure signal (AT vehicles) MANI. P V
F25 Long term fuel trim KBLRC %
F28 Long term whole fuel trim K0 %
F29 Front oxygen sensor heater current FO2H A
F30 Rear oxygen sensor heater current RO2H A
F33Maximum value of cylinder #1 misfire times during 200
rotationsMF1 %
F34Maximum value of cylinder #2 misfire times during 200
rotationsMF2 %
F35Maximum value of cylinder #3 misfire times during 200
rotationsMF3 %
F36Maximum value of cylinder #4 misfire times during 200
rotationsMF4 %
F37 Maximum EGR system pressure value (AT vehicles) EGRmax mmHg
F38 Minimum EGR system pressure value (AT vehicles) EGRmin mmHg
F45 Load data LOAD %
F46 Throttle position signal THV %
F47 Mass air flow signal QA g/s
F48 Atmospheric absolute pressure signal BARO. P kPa
F49 Intake manifold absolute pressure signal MANI. P kPa
35
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

Function mode Contents Abbreviation Unit of measure
F50 Load data (Freeze frame data) LOADF %
F51 Engine coolant temperature signal (Freeze frame data) TWF °C
F52 Short term fuel trim (Freeze frame data) ALPHF %
F53 Long term fuel trim (Freeze frame data) KBLRF %
F54Intake manifold absolute pressure signal (Freeze frame
data) MANIF kPa
F55 Engine speed signal (Freeze frame data) EREVF rpm
F56 Vehicle speed signal (Freeze frame data) VSPF km/h
FA 0 O N)OFF signal — —
FA 1 O N)OFF signal — —
FA 2 O N)OFF signal — —
FA 3 O N)OFF signal — —
FA 4 O N)OFF signal — —
FB0 Diagnostic trouble code (DTC) INSPECT —
FB1 Diagnostic trouble code (DTC) OBD —
FC0 Clear memory — —
NOTE:
1) Subaru select monitor is also available for monitoring
information other than that used for check and repair of the
vehicle.
2) The maximum values shown for F33, F34, F35 and F36
do not indicate the actual cylinder misfire rate.
36
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

3. FA MODE FOR ENGINE
Function
modeLED No. Contents Display LED“ON”requirements
FA 01 Ignition switch IG When ignition switch is turned ON.
2 AT/MT identification signal AT When AT identification signal is entered.
3 Test mode connector UD When test mode connector is connected.
5 Idle speed control identification signal ICWhen engine rpm is less than the established
value.
7 Neutral switch NT When neutral position signal is entered.
FA 12 Air conditioner switch AC When air conditioner switch is turned ON.
3 Air conditioner relay AR When air conditioner relay is in function.
4 Radiator fan relay 1 R1 When radiator fan relay 1 is in function.
5 Radiator fan relay 2 R2 When radiator fan relay 2 is in function.
6 Fuel pump relay FP When fuel pump relay is in function.
7 Purge control solenoid valve CP When purge control solenoid valve is in function.
9 Pressure sources switching solenoid valve BRWhen pressure sources switching solenoid valve
is in function.
FA 23 EGR solenoid valve EG When EGR solenoid valve is in function.
4 Engine torque control signal TR When engine torque control signal is entered.
5 Engine torque control cut signal TC When engine torque control cut signal is got out.
9 Front oxygen sensor signal FO When front oxygen sensor mixture ratio is rich.
10 Rear oxygen sensor signal RO When rear oxygen sensor mixture ratio is rich.
47
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

4. FB MODE FOR ENGINE
Function mode Abbreviation Contents Contents of display Page
FB0 INSPECTOn-board diagnostics
(Inspection)Current trouble code indicated by on-
board diagnostics after clear memory.58
FB1 OBDOn-board diagnostics
(Read data)Current trouble code indicated by on-
board diagnostics.32
5. FC MODE FOR ENGINE
Function mode Abbreviation Contents Contents of display Page
FC0 MEMORY CLR Back-up memory clearFunction of clearing trouble code stored
in memory.57
50
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

6. READ DATA FUNCTION KEY LIST FOR AT
Function mode Contents Abbr. Unit
F00 Mode display——
F01 Battery voltage VB V
F02 Vehicle speed sensor 1 VSP1 m/h
F03 Vehicle speed sensor 1 VSP1 km/h
F04 Vehicle speed sensor 2 VSP2 m/h
F05 Vehicle speed sensor 2 VSP2 km/h
F06 Engine speed EREV rpm
F07 ATF temperature sensor ATFT deg F
F08 ATF temperature sensor ATFT deg C
F09 Throttle position sensor THV V
F10 Gear position GEAR—
F11 Line pressure duty PLDTY %
F12 Lock-up duty LUDTY %
F13 AWD duty 4WDTY %
F14 Throttle position sensor power supply THVCC V
F15 Mass air flow sensor AFM V
51
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

B: LIST OF OUTPUT MODES
1. FUNCTION MODE
Mode Contents Abbr. Unit Contents of display Page
F00 Mode display——AT or EGI mode (when monitor is connected.) 61
F01 Battery voltage VB V Battery voltage applied to control unit. 61
F02 Vehicle speed sensor 1 VSP1 m/h Vehicle speed (miles/h) sent from vehicle speed sensor 1. 62
F03 Vehicle speed sensor 1 VSP1 km/h Vehicle speed (km/h) sent from vehicle speed sensor 1. 62
F04 Vehicle speed sensor 2 VSP2 m/h Vehicle speed (miles/h) sent from vehicle speed sensor 2. 62
F05 Vehicle speed sensor 2 VSP2 km/h Vehicle speed (km/h) sent from vehicle speed sensor 2. 62
F06 Engine speed EREV rpm Engine speed sent from ECM. 63
F07 ATF temperature sensor ATFT°F ATF temperature (°F) sent from ATF temperature sensor. 63
F08 ATF temperature sensor ATFT°C ATF temperature (°C) sent from ATF temperature sensor. 63
F09 Throttle position sensor THV V Voltage sent from throttle position sensor. 64
F10 Gear position GEAR—Transmission gear position 64
F11 Line pressure duty PLDTY % Duty ratio flowing through duty solenoid A. 65
F12 Lock-up duty LUDTY % Duty ratio flowing through duty solenoid B. 66
F13 AWD duty 4WDTY % Duty ratio flowing through duty solenoid C. 67
F14Throttle position sensor
power supplyTHVCC V Power supply voltage to throttle position sensor 68
F15 Mass air flow signal AFM V Output voltage from air flow sensor 68
56
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

2. ON←→OFF SIGNAL LIST
Mode LED No. Signal name Display LED“ON”requirements Page
FA 01 FWD switch FF When fuse is installed in FWD switch.—
2 Kick-down switch KD—
3—— —
4—— —
5 Brake switch BR When brake switch is turned ON.—
6 ABS switch AB When ABS signal is entered.—
7 Cruise control set CR When cruise control is set.—
8 Power switch PW—
9—— —
10—— —
FA 11 P/N range switch NP When P or N range is selected.—
2 R range switch RR When R range is selected.—
3 D range switch RD When D range is selected.—
4 3 range switch R3 When 3 range is selected.—
5 2 range switch R2 When 2 range is selected.—
6 1 range switch R1 When 1 range is selected.—
7 Diagnosis switch SS When diagnosis switch is turned ON. 70
8—— —
9—— —
10—— —
NOTE; LED Nos. 2 and 8 cannot be turned on.
3. DIAGNOSIS MODE
Mode Contents Abbr. Contents of display
FB0On-board
diagnosticsDIAG.U Current trouble code determined by on-board diagnostics.
FB1On-board
diagnosticsDIAG.MPrevious trouble code stored in memory by on-board
diagnostics.
FC0 Back-up clear—Function of clearing trouble code stored in memory.
57
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

5. Control Module I/O Signal
1. I/O SIGNAL VOLTAGE
G4M0685
ContentsTerminal
No.Ignition
switch ON,
engine
OFFInput/output signals
Measured value Measuring conditions
A.B.S.
sensorFront left wheel 22
0 V 0.12—1V
No. 22—No. 4
(When it is 10 Hz.)
GND 4
Front right wheel 23
0 V 0.12—1V
No. 23—No. 21
(When it is 10 Hz.)
GND 21
Rear left wheel 8
0 V 0.12—1V
No. 8—No. 9
(When it is 10 Hz.)
GND 9
Rear right wheel 24
0 V 0.12—1V
No. 24—No. 26
(When it is 10 Hz.)
GND 26
G sensor (AWD MT model) 13 10—12 V 0 V When slanting about 14°—21.3°(θ)
Diagnosis connector30
—— —
31
Stop light switch 25 0 V 10—12 V When brake pedal is depressed.
Motor monitoring 14 0 V 10—12 V When motor operates.
Valve power supply monitoring 32 10—12 V 10—12 V Ignition switch ON*1
Hydraulic
control
unitSolenoidFront left
wheel210—12 V 0 V
When solenoid is energized to
produce output. Front right
wheel35 10—12 V 0 V
Rear wheel 18 10—12 V 0 V
Valve relay coil 27 0 V 0 V Ignition switch ON*2
Motor relay coil 28 10—12 V 0 VWhen motor operates to produce
output.
Warning light 29 10—12 V 10—12 V Ignition switch ON*3
Power
supplyIgnition 1 10—12 V 10—12 V Ignition switch ON
Relay coil (valve,
motor, etc.)17 10—12 V 10—12 V Ignition switch ON
Grounding line10 0V 0V—
20 0V 0V—
34 0V 0V—
*1: When ignition switch is OFF or the A.B.S. system is inactive: 0 V
*2: When ignition switch is OFF or the A.B.S. system is inactive: 10—12 V
*3: When ignition switch is OFF or the A.B.S. system is inactive, or during 1.5 seconds from ignition switch ON: 0 V
5
4-4aBRAKES
5. Control Module I/O Signal