SUBARU LEGACY 1995 Service Repair Manual

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
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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) <AT vehicles>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.
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

OBD0065

FUNCTION MODE: F00
— ROM ID NUMBER (YEAR) —
CONDITION:
Ignition switch“ON”
SPECIFIED DATA:
Presentation display

Probable cause (Item outside“specified data”)
1. Error 1
Check for loose or disconnected connector, and
discontinued circuit, etc.
2. Error 2Check for poor contact of cartridge, or different type
cartridge.
B2M0270

FUNCTION MODE: F01
— BATTERY VOLTAGE (VB) —
CONDITION:
(1) Ignition switch“ON”
(2) Idling after warm-up
SPECIFIED DATA:
(1) 11±1 V
(2) 13±1 V

Probable cause (Item outside“specified data”)
1. Battery
Check battery voltage and electrolyte’s specific
gravity.
2. Charging system
Check regulating voltage. (On no-load)

Check alternator.
3. Power supply line
Check main relay. <Ref. to [T9C0].>

Check harness connector of ECM power supply
line. <Ref. to [T9C0].>
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

G2M0523

FUNCTION MODE: F02 AND F03
—VEHICLE SPEED SIGNAL (VSP)—

F02: Vehicle speed is indicated in mile per hour (MPH).

F03: Vehicle speed is indicated in kilometer per hour
(km/h).
G2M0524

FUNCTION MODE: F04
—ENGINE SPEED SIGNAL (EREV)—
OBD0176

FUNCTION MODE: F05 AND F06
—ENGINE COOLANT TEMPERATURE
SIGNAL (TW)—

F05: Engine coolant temperature is indicated in“°F”.

F06: Engine coolant temperature is indicated in“°C”.
G2M0654

FUNCTION MODE: F07
—IGNITION SIGNAL (ADVS)—
NOTE:
The ignition timing value displayed in mode F07 is a value
computed by ECM and will not always correspond with the
value measured with a timing light.
B2M0271

FUNCTION MODE: F08
—MASS AIR FLOW SIGNAL (QA)—
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

B2M0272

FUNCTION MODE: F09
—LOAD DATA (LDATA)—
OBD0671

FUNCTION MODE: F10
—THROTTLE POSITION SIGNAL (THV)—
NOTE:
Be sure that the displayed value changes smoothly when
changing throttle valve from fully closed to fully opened.
B2M0273

FUNCTION MODE: F11
—INJECTOR PULSE WIDTH (TIM)—
B2M0274

FUNCTION MODE: F12
—IDLE AIR CONTROL SIGNAL (ISC)—
OBD0205

FUNCTION MODE: F13
—FRONT OXYGEN SENSOR OUTPUT
SIGNAL
(FO2)—
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

OBD0206

FUNCTION MODE: F14
—FRONT OXYGEN SENSOR MAXIMUM
OUTPUT SIGNAL (FO2MAX)—
OBD0207

FUNCTION MODE: F15
—FRONT OXYGEN SENSOR MINIMUM
OUTPUT SIGNAL (FO2MIN)—
OBD0225

FUNCTION MODE: F16
—REAR OXYGEN SENSOR OUTPUT SIGNAL
(RO2)—
OBD0226

FUNCTION MODE: F17
—REAR OXYGEN SENSOR MAXIMUM
OUTPUT SIGNAL (RO2MAX)—
OBD0227

FUNCTION MODE: F18
—REAR OXYGEN SENSOR MINIMUM
OUTPUT SIGNAL (RO2MIN)—
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

B2M0278

FUNCTION MODE: F19
—SHORT TERM FUEL TRIM [A/F
CORRECTION COEFFICIENT] (ALPHA)—
OBD0672

FUNCTION MODE: F20
—KNOCK SENSOR SIGNAL [IGNITION
TIMING CORRECTION COEFFICIENT] (RTRD)
—
OBD0619

FUNCTION MODE: F21
—A/F CORRECTION COEFFICIENT [SHORT
TERM TRIM] BY REAR OXYGEN SENSOR
(PHOS)—
OBD0158

FUNCTION MODE: F23
—ATMOSPHERIC ABSOLUTE PRESSURE
SIGNAL [AT VEHICLES] (BARO. P)—
OBD0620

FUNCTION MODE: F24
—INTAKE MANIFOLD ABSOLUTE
PRESSURE SIGNAL [AT VEHICLES] (MANI. P)
—
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

OBD0621

FUNCTION MODE: F25
—LONG TERM FUEL TRIM [A/F LEARNING
CORRECTION COEFFICIENT] (KBLRC)—
OBD0624

FUNCTION MODE: F28
—LONG TERM FUEL TRIM WHOLE [A/F
LEARNING CONTROL COEFFICIENT] (K0)—
OBD0215

FUNCTION MODE: F29
—FRONT OXYGEN SENSOR HEATER
CURRENT (FO2H)—
OBD0235

FUNCTION MODE: F30
—REAR OXYGEN SENSOR HEATER
CURRENT (RO2H)—
OBD0627

FUNCTION MODE: F33
—MAXIMUM VALUE OF CYLINDER #1
MISFIRE RATE DURING 200 ROTATIONS
(MF1)—
NOTE:
Maximum misfire rate of cylinder #1 indicated on Subaru
select monitor is not the same as the actual rate.
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

OBD0628

FUNCTION MODE: F34
—MAXIMUM VALUE OF CYLINDER #2
MISFIRE RATE DURING 200 ROTATIONS
(MF2)—
NOTE:
Maximum misfire rate of cylinder #2 indicated on Subaru
select monitor is not the same as the actual rate.
OBD0629

FUNCTION MODE: F35
—MAXIMUM VALUE OF CYLINDER #3
MISFIRE RATE DURING 200 ROTATIONS
(MF3)—
NOTE:
Maximum misfire rate of cylinder #3 indicated on Subaru
select monitor is not the same as the actual rate.
OBD0630

FUNCTION MODE: F36
—MAXIMUM VALUE OF CYLINDER #4
MISFIRE RATE DURING 200 ROTATIONS
(MF4)—
NOTE:
Maximum misfire rate of cylinder #4 indicated on Subaru
select monitor is not the same as the actual rate.
OBD0631

FUNCTION MODE: F37
—MAXIMUM EGR SYSTEM PRESSURE
VALUE [AT VEHICLES] (EGRMAX)—
OBD0632

FUNCTION MODE: F38
—MINIMUM EGR SYSTEM PRESSURE
VALUE [AT VEHICLES] (EGRMIN)—
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

OBD0639

FUNCTION MODE: F45
—LOAD DATA (LOAD)—
OBD0640

FUNCTION MODE: F46
—THROTTLE POSITION SIGNAL (THV)—
OBD0616

FUNCTION MODE: F47
—MASS AIR FLOW SIGNAL (QA)—
OBD0159

FUNCTION MODE: F48
—ATMOSPHERIC ABSOLUTE PRESSURE
SIGNAL [AT VEHICLES] (BARO. P)—
OBD0641

FUNCTION MODE: F49
—INTAKE MANIFOLD ABSOLUTE
PRESSURE SIGNAL [AT VEHICLES] (MANI. P)
—
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System