SUBARU LEGACY 1996 Service Repair Manual

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.
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].
33
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

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.
Refer to“6. READ DATA FUNCTION KEY LIST FOR
ENGINE”2-7 [T3C6].
(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].
G3M0152
2) Designate mode using function key.
Press [F] [B] [2] [ENT] in that order.
B2M0474
3) Ensure freeze frame data(s) is (are) shown.
(1) When no trouble is detected, or after memory is
cleared.
34
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

B2M0634
(2) When some trouble is detected.

1Abbreviation

2Diagnostic trouble code of trouble occurred
B2M0671
NOTE:
Other freeze frame data is shown on display by pushing the
function key ["].
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”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.
35
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

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
B2M0649
(4) When multiple troubles corresponding to the dis-
played item are detected.
NOTE:
Freeze frame data is shown on display for 2 seconds at a
time.
36
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
F29 A/F correction (short term trim) by rear oxygen sensor PHOS %
F30 Long term fuel trim KBLRC %
F31 Long term whole fuel trim 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 only)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—
37
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
Throttle position signal (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:
1) Subaru select monitor is also available for monitoring
information other than that used for check and repair of the
vehicle.
2) 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.
3) *1: “Hi” or “Low” is shown instead of measured value.
4) 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.
38
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

B2M0476
7. 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
8. 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 2-7 [T8C1].>

Check harness connector of ECM power supply
line. <Ref. to 2-7 [T8C2], [T8C3].>
39
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.
40
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

B2M0482
14. FUNCTION MODE: F07
—THROTTLE POSITION SIGNAL (THV)—

Throttle position is indicated in percentage (%) and volt-
age (V) at the same time.
NOTE:
Be sure that the displayed value changes smoothly when
changing throttle valve from fully closed to fully opened.
B2M0483
15. FUNCTION MODE: F08
—INJECTOR PULSE WIDTH (TIM)—
B2M0484
16. FUNCTION MODE: F09
—IDLE AIR CONTROL SIGNAL (ISC)—
B2M0485
17. FUNCTION MODE: F10
—LOAD DATA (LOAD)—
B2M0486
18. FUNCTION MODE: F11
—FRONT OXYGEN SENSOR OUTPUT SIGNAL (O2)
—
41
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

B2M0487
19. FUNCTION MODE: F12
—FRONT OXYGEN SENSOR MAXIMUM AND
MINIMUM OUTPUT SIGNAL (FO2MAX - MIN)—

Front oxygen sensor maximum and minimum output sig-
nals are indicated at the same time.
B2M0488
20. FUNCTION MODE: F13
—REAR OXYGEN SENSOR OUTPUT SIGNAL (RO2)
—
B2M0489
21. FUNCTION MODE: F14
—REAR OXYGEN SENSOR MAXIMUM AND MINIMUM
OUTPUT SIGNAL (RO2MAX - MIN)—

Rear oxygen sensor maximum and minimum output sig-
nals are indicated at the same time.
B2M0490
22. FUNCTION MODE: F17
—SHORT TERM FUEL TRIM [A/F CORRECTION
COEFFICIENT] (ALPHA)—
B2M0491
23. FUNCTION MODE: F19
—KNOCK SENSOR SIGNAL [IGNITION TIMING
CORRECTION COEFFICIENT] (KNOCK)—
42
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System