engine SUBARU LEGACY 1997 Service Repair Manual

4. POWERTRAIN FREEZE FRAME DATA (MODE $02)
Refers to data denoting the operating condition when
trouble is sensed by the on-board diagnosis system.
A list of the support data and PID (Parameter Identification)
codes are shown in the following table.
PID DataUnit of measure
02 Trouble code that caused CARB required freeze frame data storage—
03 Fuel system control status—
04 Calculated engine load value%
05 Engine coolant temperature°C
06 Short term fuel trim%
07 Long term fuel trim%
0B Intake manifold absolute pressurekPa
0C Engine revolutionrpm
0D Vehicle speedkm/h
NOTE:
Refer to OBD-II general scan tool manufacturer’s instruc-
tion manual to access freeze frame data (MODE $02).
5. EMISSION-RELATED POWERTRAIN DIAGNOSTIC
TROUBLE CODE (MODE $03)
Refers to data denoting emission-related powertrain diag-
nostic trouble codes.
For details concerning diagnostic trouble codes, refer to
the DIAGNOSTIC TROUBLE CODE (DTC) LIST. 2-7 [T10A0], [T11A0].>
NOTE:
Refer to OBD-II general scan tool manufacturer’s instruc-
tion manual to access emission-related powertrain diag-
nostic trouble codes (MODE $03).
34
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

OBD0006F
B2M0433D
(2) Open the cover and connect Subaru select monitor
to data link connector located in the lower portion of the
instrument panel (on the driver’s side), to the lower
cover.
CAUTION:
Do not connect scan tools except for Subaru select
monitor and OBD-II general scan tool.
OBD0060
5) Turn ignition switch to ON (engine OFF) and Subaru
select monitor switch to ON.
6) Using Subaru select monitor, call up diagnostic trouble
code(s) and various data, then record them.
H2M1149
2. READ DIAGNOSTIC TROUBLE CODE (DTC)
SHOWN ON DISPLAY. (MODE FB1)
1) Select engine mode using function key.
Press the function key [0].
G3M0152
2) Designate mode using function key.
Press [F] [B] [1] [ENT] in that order.
37
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

OBD0062
3) Ensure diagnostic trouble code(s) is shown.
(1) When there is only one diagnostic trouble code.
OBD0063
(2) When there are multiple diagnostic trouble codes.
NOTE:
For details concerning diagnostic trouble codes, refer to
the DIAGNOSTIC TROUBLE CODE (DTC) LIST. 2-7 [T10A0], [T11A0].>
H2M1149
3. READ CURRENT DATA SHOWN ON DISPLAY FOR
ENGINE. (FUNCTION MODE)
1) Select engine mode using function key.
Press the function key [0].
G3M0152
2) Designate mode using function key.

(Example: Press [F] [0] [1] [ENT] in that order.)
3) Ensure data of input or output signal is shown.
H2M1149
4. READ FREEZE FRAME DATA SHOWN ON
DISPLAY. (MODE FB2)
1) Select engine mode using function key.
Press the function key [0].
38
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

H2M1149
5. READ FREEZE FRAME DATA SHOWN ON
DISPLAY. (MODE FB3)
NOTE:

For items and contents shown on display, refer to“6.
READ DATA FUNCTION KEY LIST FOR ENGINE”. to 2-7 [T3C6].>

Freeze frame data will not erase without clearing
memory.
1) Select engine mode using function key.
Press the function key [0].
G3M0152
2) Designate mode using function key.
Press [F] [B] [3] [ENT] in that order.
B2M0636
3) Ensure freeze frame data(s) is (are) shown.
(1) When no trouble is detected, or after memory is
cleared.
B2M0636
(2) When a trouble occurs but the corresponding item
is not displayed.
B2M0638
(3) When only one trouble corresponding to the dis-
played item has occurred.

1Abbreviation

2Diagnostic trouble code of trouble occurred
40
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

6. 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 km/h, MPH
F03 Engine speed signal EREV rpm
F04 Engine coolant temperature signal TW°C,°F
F05 Ignition signal ADVS deg
F06 Mass air flow signal QA g/s, V
F07 Throttle position signal THV %, V
F08 Injector pulse width TIM mS
F09 Idle air control signal ISC %
F10 Load data LOAD %
F11 Front oxygen sensor output signal O2 V
F12 Front oxygen sensor maximum and minimum output signal O2max - min V, V
F13 Rear oxygen sensor output signal RO2 V
F14 Rear oxygen sensor maximum and minimum output signal RO2max - min V, V
F17 Short term fuel trim ALPHA %
F19 Knock sensor signal KNOCK deg
F20 Atmospheric absolute pressure signal BARO. P kPa, mmHg
F21 Intake manifold absolute pressure signal MANI. P kPa, mmHg
F29A/F correction coefficient [short term trim] by rear oxygen sen-
sorPHOS %
F30 Long term fuel trim [A/F learning correction coefficient] KBLRC %
F31 Long term fuel trim whole [A/F learning control coefficient] K0 %
F32 Front oxygen sensor heater current FO2H A
F33 Rear oxygen sensor heater current RO2H A
F35 Purge control solenoid valve duty ratio CPCD %
F36Maximum value of cylinder #1 misfire times during 100 rota-
tionsMF1 %
F37Maximum value of cylinder #2 misfire times during 100 rota-
tionsMF2 %
F38Maximum value of cylinder #3 misfire times during 100 rota-
tionsMF3 %
F39Maximum value of cylinder #4 misfire times during 100 rota-
tionsMF4 %
F42Maximum and minimum EGR system pressure value (AT
vehicles)EGRmax - min kPa
F43 Fuel tank pressure signal TNKP kPa, mmHg
F44 Fuel temperature signal TNKT°C,°F
F45 Fuel level signal FLEVEL V
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——
FA 5 O N)OFF signal——
FB0 Diagnostic trouble code (DTC) INSPECT—
FB1 Diagnostic trouble code (DTC) OBD—
42
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

Function mode Contents Abbreviation Unit of measure
FB2Load data (Freeze frame data) LOADF %
Engine coolant temperature signal (Freeze frame data) TWF °C
Short term fuel trim (Freeze frame data) ALPHF %
Long term fuel trim (Freeze frame data) KBLRF %
Intake manifold absolute pressure signal (Freeze frame data) MANIF kPa
Engine speed signal (Freeze frame data) EREVF rpm
Vehicle speed signal (Freeze frame data) VSPF km/h
FB3Mass air flow signal (Freeze frame data) QAF (P0100) V
Pressure signal (Freeze frame data) PSF (P0105) V
Pressure signal (Freeze frame data) PRF (P0106) V
Engine coolant temperature signal (Freeze frame data) TWF (P0115) V
Throttle position signal (Freeze frame data) THVF (P0120) V
EGR control solenoid valve signal (Freeze frame data) EGR (P0403) —*1
Purge control solenoid valve signal (Freeze frame data) CPC (P0443) —*1
Start switch signal (Freeze frame data) STSW (P1100) —*1
Pressure sources switching solenoid valve signal (Freeze
frame data)BR1 (P1102) —*1
Radiator fan relay 1 signal (Freeze frame data) FAN1 (P1500) —*1
FC0 Clear memory — —
FD01 Compulsory fuel pump relay operation check FUEL PUMP —
FD02 Compulsory purge control solenoid valve operation check CPC SOL —
FD03 Compulsory radiator fan relay operation check RAD FAN —
FD04 Compulsory A/C relay operation check A/C RELAY —
FD05 Compulsory EGR control solenoid valve operation check EGR SOL —
FD07 Compulsory pressure control solenoid valve operation check PCV SOL —
FD08 Compulsory vent control solenoid valve operation check VENT SOL —
FD10Compulsory pressure sources switching solenoid valve opera-
tion checkBR SOL —
NOTE:

Subaru select monitor is also available for monitoring
information other than that used for check and repair of the
vehicle.

F42 (Maximum and minimum EGR system pressure
value) will not read accurately until the EGR flow diagno-
sis terminates.
EGR flow diagnosis terminates when LED No. 2 illuminates
at function mode FA4.

*1: “Hi” or “Low” is shown instead of measured value.

Because ASV solenoid valve, FICD solenoid valve and
air injection system diagnosis solenoid valve are not
installed, FD06, FD09 and FD11 will be displayed but non-
functional.
43
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

B2M0754
9. FUNCTION MODE: F02
—VEHICLE SPEED SIGNAL (VSP)—

Vehicle speed is indicated in kilometer per hour (km/h)
and mile per hour (MPH) at the same time.
B2M0478
10. FUNCTION MODE: F03
—ENGINE SPEED SIGNAL (EREV)—
B2M0479
11. FUNCTION MODE: F04
—ENGINE COOLANT TEMPERATURE SIGNAL (TW)
—

Engine coolant temperature is indicated in“°C”and“°F”
at the same time.
B2M0480
12. FUNCTION MODE: F05
—IGNITION SIGNAL (ADVS)—
NOTE:
The ignition timing value displayed in mode F05 is a value
computed by ECM and will not always correspond with the
value measured with a timing light.
B2M0481
13. FUNCTION MODE: F06
—MASS AIR FLOW SIGNAL (QA)—

Mass air flow and voltage input from mass air flow sen-
sor are shown on display at the same time.
45
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

40. FA MODE FOR ENGINE
Function
modeLED No. Contents Display LED“ON”requirements
FA 03 Neutral switch NT When neutral position signal is entered.
7 Test mode connector UD When test mode connector is connected.
8 AT/MT identification signal AT When AT identification signal is entered.
9 Ignition switch IG When ignition switch is turned ON.
FA 11 Radiator fan relay 2 R2 When radiator fan relay 2 is in function.
2 Knock signal KS When knock signal is entered.
3 Purge control solenoid valve CN When purge control solenoid valve is in function.
4 Fuel pump relay FP When fuel pump relay is in function.
6 Radiator fan relay 1 R1 When radiator fan relay 1 is in function.
7 Air conditioner relay AR When air conditioner relay is in function.
8 Air conditioner switch AC When air conditioner switch is turned ON.
FA 22 AEC signal EC When AEC signal is entered.
3 EAM signal AM When EAM signal is gone out.
4 AEB signal EB When AEB signal is entered.
6 AET signal ET When AET signal is entered.
7 Engine torque control signal TR When engine torque control signal is entered.
FA3 7 Pressure sources switching solenoid valve BRWhen pressure sources switching solenoid valve
is in function.
FA 41 Catalyst CA When diagnosis of catalyzer is finished.
2 EGR system E1 When diagnosis of EGR system is finished.
3 California spec. vehicle identification signal FCWhen Federal spec. vehicle identification signal is
entered.
8 Rear oxygen sensor signal OR When rear oxygen sensor mixture ratio is rich.
9 Front oxygen sensor signal O2 When front oxygen sensor mixture ratio is rich.
FA 56 Vent control solenoid valve AL When vent control solenoid valve is in function.
7 EGR solenoid valve ER When EGR solenoid valve is in function.
8 Pressure control solenoid valve PCWhen pressure control solenoid valve is in
function.
52
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

LED No. Signal name Display
1——
2——
3 Neutral switch NT
4——
5——
6——
7 Test mode connector UD
8 Identification of AT model AT
9 Ignition switch IG
0——
——NT——
—UD AT IG—
1
2345
67890
41. FUNCTION MODE: FA0
—ON↔OFF SIGNAL—
Requirement for LED“ON”.
LED No. 3
On MT model, gear position is in neutral.

On AT model, shift position is in“P”or“N”.
LED No. 7 Test mode connector is connected.
LED No. 8 Vehicle is AT model.
LED No. 9 Ignition switch is turned ON.
LED No. Signal name Display
1 Radiator fan relay 2 R2
2 Knock signal KS
3Purge control solenoid
valveCN
4 Fuel pump relay FP
5——
6 Radiator fan relay 1 R1
7 A/C relay AR
8 A/C switch AC
9——
0——
R2 KS CN FP—
R1 AR AC——
1
2345
67890
42. FUNCTION MODE: FA1
—ON↔OFF SIGNAL—
Requirement for LED“ON”.
LED No. 1 Radiator fan relay 2 is turned ON.
LED No. 2 Engine is knocking.
LED No. 3 Purge control solenoid valve is in function.
LED No. 4 Fuel pump relay is turned ON.
LED No. 6 Radiator fan relay 1 is turned ON.
LED No. 7 A/C relay is turned ON.
LED No. 8 A/C switch is turned ON.
NOTE:

When LED No. 1, 3, 4, 6 and 7 blinks with the test mode
connector connected and the ignition switch turned to ON,
the corresponding part is functioning properly.

When LED No. 4 illuminates for only 2 seconds after the
ignition switch is turned to ON, (and then goes out), the
corresponding part is functioning properly.

LED No. 3 is applicable only to the models not equipped
with enhanced evaporative emission control system.
53
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

LED No. Signal name Display
1——
2 AEC signal EC
3 EAM signal AM
4 AEB signal EB
5——
6 AET signal ET
7Engine torque control
signalTR
8——
9——
0——
—EC AM EB—
ET TR———
1
2345
67890
43. FUNCTION MODE: FA2
—ON↔OFF SIGNAL—
Requirement for LED“ON”.
LED No. 2 ECM entered the AEC signal emitted from
TCS C/M.
LED No. 3 EAM signal goes out.
LED No. 4 ECM entered the AEB signal emitted from
TCS C/M.
LED No. 6 ECM entered the AET signal emitted from
TCS C/M.
LED No. 7 ECM entered the torque control signal emit-
ted from TCM.
LED No. Signal name Display
1——
2——
3——
4——
5——
6——
7Pressure sources switching
solenoid valveBR
8——
9——
0——
—————
—BR———
1
2345
67890
44. FUNCTION MODE: FA3
—ON↔OFF SIGNAL—
Requirement for LED“ON”.
LED No. 7 Pressure sources switching solenoid valve is
in function.
NOTE:
When LED No. 7 blinks with the test mode connector con-
nected and the ignition switch turned to ON, the corre-
sponding part is functioning properly.
54
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System