1996 SUBARU LEGACY Fuel system

G2M0464
10V4
CHECK FUEL INJECTOR.
Measure resistance between fuel injector terminals on
faulty cylinder.
: Terminals
No. 1—No. 2:
Is the resistance between 5 and 20Ω?
: Replace faulty fuel injector.
: Go to step10V5.
OBD0715A
10V5
CHECK POWER SUPPLY LINE.
1) Turn ignition switch to ON.
2) Measure voltage between fuel injector and engine
ground on faulty cylinders.
: Connector & terminal
#1 (E5) No. 2 (+)—Engine ground ():
#2 (E16) No. 2 (+)—Engine ground ():
#3 (E6) No. 2 (+)—Engine ground ():
#4 (E17) No. 2 (+)—Engine ground ():
Is the voltage more than 10 V?
: Repair poor contact in all connectors in fuel injec-
tor circuit.
: Repair harness and connector.
NOTE:
In this case, repair the following:

Open circuit in harness between main relay and fuel
injector connector on faulty cylinders

Poor contact in main relay connector

Poor contact in fuel injector connector on faulty cylinders
202
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

: Has the vehicle been run empty of fuel?
: Finish diagnostics operation, if the engine has no
abnormality.
: Go to next.
: Was the cause of misfire diagnosed when
the engine is running?
NOTE:
Ex. Remove spark plug cord, etc.
: Finish diagnostics operation, if the engine has no
abnormality.
: Repair connector.
NOTE:
In this case, repair the following:

Poor contact in ignitor connector

Poor contact in ignition coil connector

Poor contact in fuel injector connector on faulty cylinders

Poor contact in ECM connector

Poor contact in coupling connector (B22)
10Z3
CHECK AIR INTAKE SYSTEM.
: Is there a fault in air intake system?
NOTE:
Check the following items:

Are there air leaks or air suction caused by loose or dis-
located nuts and bolts?

Are there cracks or any disconnection of hoses?
: Repair air intake system.
: Go to step10Z4.
OBD0145A
10Z4
CHECK MISFIRE SYMPTOM.
1) Turn ignition switch to OFF.
2) Connect the Subaru Select Monitor or the OBD-II gen-
eral scan tool to data link connector.
3) Turn ignition switch to ON, and turn Subaru Select
Monitor or OBD-II general scan tool switch to ON.
207
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

G3M0152
4) Read diagnostic trouble code (DTC).

Subaru Select Monitor
Designate mode use function key.
Function mode: FB1

OBD-II general scan tool
For detailed operation procedures, refer to the OBD-II Gen-
eral Scan Tool Operation Manual.
NOTE:
Perform diagnosis according to the items listed below.
DTC Next action
Only one cylinder Go to step
1.
P0301 and P0302 Go to step
2.
P0303 and P0304 Go to step
3.
P0301 and P0303 Go to step
4.
P0302 and P0304 Go to step
5.
Others Go to step
6.
1ONLY ONE CYLINDER
: Is there a fault in that cylinder?
NOTE:
Check the following items.

Spark plug

Spark plug cord

Fuel injector

Compression ratio
: Go to next.
: Go to DTC P0170, 2-7 [T10P3], [T10P4] and
[T10P5].

2GROUP OF #1 AND #2 CYLINDERS
: Are there faults in #1 and #2 cylinders?
NOTE:
Check the following items.

Spark plugs

Fuel injectors

Ignition coil
: Go to next.
: Go to DTC P0170, 2-7 [T10P3], [T10P4] and
[T10P5].
NOTE:
If no abnormal is discovered, check for“8. F: IGNITION
SYSTEM”of #1 and #2 cylinders side.
208
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

3GROUP OF #3 AND #4 CYLINDERS
: Are there faults in #3 and #4 cylinders?
NOTE:
Check the following items.

Spark plugs

Fuel injectors

Ignition coil
: Go to next.
: Go to DTC P0170, 2-7 [T10P3], [T10P4] and
[T10P5].
NOTE:
If no abnormal is discovered, check for“8. F: IGNITION
SYSTEM”of #3 and #4 cylinders side.

4GROUP OF #1 AND #3 CYLINDERS
: Are there faults in #1 and #3 cylinders?
NOTE:
Check the following items.

Spark plugs

Fuel injectors

Skipping timing belt teeth
: Go to next.
: Go to DTC P0170, 2-7 [T10P3], [T10P4] and
[T10P5].

5GROUP OF #2 AND #4 CYLINDERS
: Are there faults in #2 and #4 cylinders?
NOTE:
Check the following items.

Spark plugs

Fuel injectors

Skipping timing belt teeth
: Go to next.
: Go to DTC P0170, 2-7 [T10P3], [T10P4] and
[T10P5].

6THE CYLINDER AT RANDOM
: Is the engine idle rough?
: Go to next.
: Go to DTC P0170, 2-7 [T10P3], [T10P4] and
[T10P5].
209
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

H2M1365
AG: DTC P0440
—EVAPORATIVE EMISSION CONTROL
SYSTEM MALFUNCTION (EVAP)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Gasoline smell
10AG1Check any other DTC (besides DTC P0440) on
display.
10AG2Check fuel filler cap and fuel filler pipe.
10AG3Check vent control solenoid valve.
10AG4Check purge control solenoid valve.
10AG5Check pressure control solenoid valve.
10AG6Check evaporative emission control system
line.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.






236
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:

RHD Model
B2M1017
10AG1CHECK ANY OTHER DTC (BESIDES DTC
P0440) ON DISPLAY.
: Is there any other DTC on display?
: Inspect the relevant DTC using“10. Diagnostics
Chart with Trouble Code, 2-7 [T1000]”.
: Go to step10AG2.
10AG2CHECK FUEL FILLER CAP AND FUEL
FILLER PIPE.
1) Turn ignition switch to OFF.
2) Open the fuel flap.
: Is the fuel filler cap tightened securely?
: Tighten fuel filler cap securely.
: Go to next.
238
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

: Is there any damage to the seal between
fuel filler cap and fuel filler pipe?
: Repair or replace fuel filler cap and fuel filler pipe.
: Go to step10AG3.
OBD0005B
10AG3CHECK VENT CONTROL SOLENOID
VA LV E .
1) Connect test mode connector.
2) Turn ignition switch to ON.
B2M0925A
: Does vent control solenoid valve produce
operating sound?
NOTE:
Vent control solenoid valve operation check can also be
executed using Subaru Select Monitor (Function mode:
FD08). For the procedure, refer to“COMPULSORY VALVE
OPERATION CHECK MODE”2-7 [T3F0].
: Go to step10AG4.
: Replace vent control solenoid valve.
OBD0025B
10AG4CHECK PURGE CONTROL SOLENOID
VA LV E .
: Does purge control solenoid valve produce
operating sound?
NOTE:
Purge control solenoid valve operation check can also be
executed using Subaru Select Monitor (Function mode:
FD02). For the procedure, refer to“COMPULSORY VALVE
OPERATION CHECK MODE”2-7 [T3F0].
: Go to step10AG5.
: Replace purge control solenoid valve.
239
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

B2M0923B
10AG5CHECK PRESSURE CONTROL SOLE-
NOID VALVE.
: Does pressure control solenoid valve pro-
duce operating sound?
NOTE:
Pressure control solenoid valve operation check can also
be executed using Subaru Select Monitor (Function mode:
FD07). For the procedure, refer to“COMPULSORY VALVE
OPERATION CHECK MODE”2-7 [T3F0].
: Go to step10AG6.
: Replace pressure control solenoid valve.
10AG6CHECK EVAPORATIVE EMISSION CON-
TROL SYSTEM LINE.
Turn ignition switch to OFF.
: Does fuel leak in fuel line?
: Repair or replace fuel line.
: Go to next.
: Is there any damage at canister?
: Repair or replace canister.
: Go to next.
: Is there any damage at fuel tank?
: Repair or replace fuel tank.
: Go to next.
: Are there holes, cracks, clogging or discon-
nections of hoses or pipes in evaporative
emission control system?
: Repair or replace hoses or pipes.
: Contact with SOA service.
NOTE:
Inspection by DTM is required, because probable cause is
deterioration of multiple parts.
240
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code