SUBARU LEGACY 1995 Service Repair Manual

10. INSTRUMENT PANEL WIRING HARNESS AND
GROUND POINT (RHD MODEL)
B2M0442
95
2-7ON-BOARD DIAGNOSTICS II SYSTEM
6. Wiring Diagram and Wiring Harness

11. REAR WIRING HARNESS AND GROUND POINT
(LHD MODEL)
OBD0734
96
2-7ON-BOARD DIAGNOSTICS II SYSTEM
6. Wiring Diagram and Wiring Harness

12. REAR WIRING HARNESS AND GROUND POINT
(RHD MODEL)
B2M0443
97
2-7ON-BOARD DIAGNOSTICS II SYSTEM
6. Wiring Diagram and Wiring Harness

13. FLOOR WIRING HARNESS, DOOR CORD AND
GROUND POINT (LHD MODEL)
OBD0735
98
2-7ON-BOARD DIAGNOSTICS II SYSTEM
6. Wiring Diagram and Wiring Harness

14. DOOR CORD AND GROUND POINT (RHD
MODEL)
B2M0444
99
2-7ON-BOARD DIAGNOSTICS II SYSTEM
6. Wiring Diagram and Wiring Harness

7. Basic Diagnostics Procedure
Trouble occurs.
Ask the customer when and how the
trouble occurred using interview
check list. <Ref. to [T702].>
Start the engine.
Ye sNoInspection using“9. Diagnostics for
Engine Start Failure [T900]”
Malfunction indicator lamp (MIL) illu-
minates.
Ye sNoInspection using“10. General Diag-
nostics Table [T1000]”
Inspection using Subaru select moni-
tor or OBD-II general scan tool.
(Subaru select monitor: MODE FB1)
Trouble code
No trouble code designated.Repair.
See NOTE: *1
designated.
Inspection using“11. Diagnostics
Chart with Trouble Code [T11A0]”.
See NOTE: *2.
Trouble code
designated.

Repair.
Inspection mode
Inspection using Subaru select moni-
tor or OBD-II general scan tool.
(Subaru select monitor: MODE FB0)
No trouble code
Clear memory mode.
designated.
END
NOTE:
*1: If trouble code is not shown on display although the
MIL illuminates, perform diagnostics of the MIL (CHECK
ENGINE LIGHT) circuit or combination meter. <Refer to“8.
Diagnostics for CHECK ENGINE Malfunction Indicator
Lamp (MIL) [T800].”>
*2: Carry out the basic check, only when trouble code
about automatic transmission is shown on display. <Ref. to
[T701].>






100
2-7ON-BOARD DIAGNOSTICS II SYSTEM
7. Basic Diagnostics Procedure

1. BASIC CHECK ITEMS FOR AT
When trouble code about automatic transmission is shown
on display, carry out the following basic check. After that,
carry out the replacement or repair work.
1) ATF level check
2) Differential gear oil level check
3) ATF leak check
4) Differential gear oil leak check
5) Brake band adjustment
6) Stall test
7) Line pressure test
8) Transfer clutch pressure test
9) Time lag test
10) Road test
11) Shift characteristics
NOTE:
As for the method, refer to 3-2 [W2A1].
101
2-7ON-BOARD DIAGNOSTICS II SYSTEM
7. Basic Diagnostics Procedure

2. CHECK LIST FOR INTERVIEW
Check the following items when problem occurred.
Customer’s name Engine no.
Date of sale Fuel brand
Date of repair Odometer readingkm
miles
Vin no.
WeatherFineCloudyRainySnowyVarious/Other
Outdoor TemperatureHotWarmCoolCold (approx.°F/°C)
PlaceHighwaySuburbsInner CityUphillDownhill
Rough roadOther
Engine Temp.ColdWarming-upAfter warming-upAny temp.Other
Engine speed
0 2,000 4,000 6,000 8,000 rpm
Driving conditionsNot affected
At startingWhile idlingAt racing
While acceleratingWhile cruising
While deceleratingWhile turning (RH/LH)
Vehicle speed
0 10203040 5060MPH
HeadlightON /OFF
BlowerON /OFF
A/C compressorON /OFF
Cooling fanON /OFF
Front wiperON /OFF
Rear wiperON /OFF
Rear defoggerON /OFF
RadioON /OFF
CD/CassetteON /OFF
Car phoneON /OFF
CB
NOTE: Use copies of this page for interviewing customers.
102
2-7ON-BOARD DIAGNOSTICS II SYSTEM
7. Basic Diagnostics Procedure

Check the following items about the vehicle’s state when
MIL turns on.
a) Other warning lights or indicators turn on.Ye s /No

1Low fuel warning light

2Charge indicator light

3AT diagnostics indicator light

4ABS warning light

5TCS warning light

6Engine oil pressure warning light
b) Fuel level

Lack of gasoline:Ye s /No

Indicator position of fuel gauge:
c) Intentional connecting or disconnecting of harness connectors or spark plug cords:Ye s /No

What:
d) Intentional connecting or disconnecting of hoses:Ye s /No

What:
e) Installing of parts other than genuine partsYe s /No

What:

Where:
f) Occurrence of noiseYe s /No

From where:

What kind:
g) Occurrence of smellYe s /No

From where:

What kind:
h) Intrusion of water into engine compartment or passenger compartmentYe s /No
i) Troubles occurred

1Engine does not start.

2Engine stalls during idling.

3Engine stalls while driving.

4Engine speed decreases.

5Engine speed does not decrease.

6Rough idling

7Poor acceleration

8Back fire

9After fire

10No shift

11Excessive shift shock
NOTE: Use copies of this page for interviewing customers.
103
2-7ON-BOARD DIAGNOSTICS II SYSTEM
7. Basic Diagnostics Procedure

8. Diagnostics for CHECK ENGINE
Malfunction Indicator Lamp (MIL)
DIAGNOSIS:

The CHECK ENGINE malfunction indicator lamp (MIL)
circuit is in short or open.
TROUBLE SYMPTOM:

When ignition switch is turned to ON (engine OFF), MIL
does not illuminate.....TROUBLE SYMPTOM 1

Although MIL illuminates, trouble code is not shown on
Subaru select monitor or the OBD-II general scan tool dis-
play.....TROUBLE SYMPTOM 2
1.Classify the malfunction. Is it a TROUBLE
SYMPTOM 1 or TROUBLE SYMPTOM 2?
TROUBLE SYMPTOM 2

TROUBLE
SYMPTOM 1
2.Check output signal from ECM.
4.Check short circuit of harness.3.Check harness connector between ECM and
ignition switch.
WIRING DIAGRAM:
OBD0094

104
2-7ON-BOARD DIAGNOSTICS II SYSTEM
8. Diagnostics for CHECK ENGINE Malfunction Indicator Lamp (MIL)