SUBARU LEGACY 1995 Service Repair Manual

OBD0642

FUNCTION MODE: F50
—LOAD DATA [FREEZE FRAME DATA)
(LOAD
—F)—
OBD0643

FUNCTION MODE: F51
—ENGINE COOLANT TEMPERATURE
SIGNAL [FREEZE FRAME DATA] (TW
—F)—
OBD0644

FUNCTION MODE: F52
—THROTTLE POSITION SIGNAL [FREEZE
FRAME DATA] (ALPH
—F)—
OBD0645

FUNCTION MODE: F53
—LONG TERM FUEL TRIM <A/F LEARNING
CONTROL COEFFICIENT> [FREEZE FRAME
DATA] (KBLR
—F)—
OBD0646

FUNCTION MODE: F54
—INTAKE MANIFOLD ABSOLUTE
PRESSURE SIGNAL <AT VEHICLES>
[FREEZE FRAME DATA] (MANI
—F)—
45
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

OBD0647

FUNCTION MODE: F55
—ENGINE SPEED SIGNAL [FREEZE FRAME
DATA] (EREV
—F)—
OBD0648

FUNCTION MODE: F56
—VEHICLE SPEED SIGNAL [FREEZE FRAME
DATA] (VSP
—F)—
46
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

LED No. Signal name Display
1 Ignition switch IG
2 Identification of AT model AT
3 Test mode connector UD
4——
5 ISC identification IC
6——
7Park/Neutral position
switchNT
8——
9——
10——
IG AT UD ID IC
—NT———
1
2345
678910

FUNCTION MODE: FA0
—ON↔OFF SIGNAL—
Requirement for LED“ON”.
LED No. 1 Ignition switch is turned ON.
LED No. 2 Vehicle is AT model.
LED No. 3 Test mode connector is connected.
LED No. 5 Engine speed is less than the specified
value.
LED No. 7
On MT model, gear position is in neutral.

On AT model, shift position is in“P”or“N”.
LED No. Signal name Display
1——
2 A/C switch AC
3 A/C relay AR
4 Radiator fan relay 1 R1
5 Radiator fan relay 2 R2
6 Fuel pump relay FP
7Purge control solenoid
valveCP
8——
9Pressure sources switching
solenoid valveBR
10——
—AC AR R1 R2
FP CP—BR—
1
2345
678910

FUNCTION MODE: FA1
—ON↔OFF SIGNAL—
Requirement for LED“ON”.
LED No. 2 A/C switch is turned ON.
LED No. 3 A/C relay is turned ON.
LED No. 4 Radiator fan relay 1 is turned ON.
LED No. 5 Radiator fan relay 2 is turned ON.
LED No. 6 Fuel pump relay is turned ON.
LED No. 7 Purge control solenoid valve is in function.
LED No. 9 Pressure sources switching solenoid valve is
in function.
NOTE:

When LED No. 3, 4, 5, 6, 7 and 9 blinks with the test
mode connector connected and the ignition switch turned
to ON, the corresponding part is functioning properly.

When LED No. 6 illuminates for only 2 seconds after the
ignition switch is turned to ON, (and then goes out), the
corresponding part is functioning properly.
48
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

LED No. Signal name Display
1——
2——
3 EGR solenoid valve EG
4 Torque control signal TR
5 Torque control cut signal TC
6——
7——
8——
9 Front oxygen sensor signal FO
10 Rear oxygen sensor signal RO
——EG TR TC
———FO RO
1
2345
678910

FUNCTION MODE: FA2
—ON↔OFF SIGNAL—
Requirement for LED“ON”.
LED No. 3 EGR solenoid valve is in function.
LED No. 4 ECM entered the torque control signal emit-
ted from TCM.
LED No. 5 Engine torque control cut signal goes out.
LED No. 9 Front oxygen sensor mixture ratio is rich.
LED No. 10 Rear oxygen sensor mixture ratio is rich.
49
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

G3M0723

FUNCTION MODE: F00
—MODE DISPLAY—
SPECIFIED DATA:
Data at the left should be indicated.
Probable cause (if outside“specified data”)
1. Communication failure
(No communication method can be confirmed
with power ON.)
(1)Check loose or poor connectors, or
shortcircuit.
(2) Check type of cartridge.
2. Vehicle types cannot be identified (due to
communication failure).Check improper cartridge.
Replace with proper one.
OBD0673

FUNCTION MODE: F01
—BATTERY VOLTAGE (VB)—
CONDITION:
(1) Ignition switch ON
(2) Engine idling after warm-up
SPECIFIED DATA:
(1) 12±1 V
(2) 13±1 V
1. BatteryCheck battery voltage and specific gravity of
electrolyte.
2. Charging system(1)Measure regulating voltage under no loads.
(2) Check generator (as a single unit).
52
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

G3M0725

FUNCTION MODE: F02
—VEHICLE SPEED SENSOR 1 (VSP1)—

F02: Vehicle speed is indicated in mile per hour (m/h).

F03: Vehicle speed is indicated in kilometer per hour
(km/h).
G3M0726

FUNCTION MODE: F04
—VEHICLE SPEED SENSOR 2 (VSP2)—

F04: Vehicle speed is indicated in mile per hour (m/h).

F05: Vehicle speed is indicated in kilometer per hour
(km/h).
G3M0727

FUNCTION MODE: F06
—ENGINE SPEED (EREV)—
B2M0620

FUNCTION MODE: F07
—ATF TEMPERATURE SENSOR (ATFT)—

F07: ATF temperature is indicated in“deg F”.

F08: ATF temperature is indicated in“deg C”.
G3M0935

FUNCTION MODE: F09
—THROTTLE POSITION SENSOR (THV)—
53
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

G3M0730

FUNCTION MODE: F10
—GEAR POSITION (GEAR)—
G3M0731

FUNCTION MODE: F11
—LINE PRESSURE DUTY (PLDTY)—
G3M0732

FUNCTION MODE: F12
—LOCK-UP DUTY (LUDTY)—
G3M0733

FUNCTION MODE: F13
—AWD DUTY (4WDTY)—
B3M0259

FUNCTION MODE: F14
—THROTTLE POSITION SENSOR POWER
SUPPLY (THVCC)—
54
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System