ECO mode SUBARU LEGACY 1996 Service Repair Manual

2-7
[T3C2]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

SELECT
SYSTEM

EGi
Y
:O,N
:/

1
101

H2M1149
I

=0=1
1H]

D
E
F
T

aor0l
oo
L

oo0
RD
FE-11
456
7

F111
0
0
F1_31
a

F03
0
FL-11
ED101

SUBARU
03M0152
I

OBD
(FB
1)

PO100


Diagnostic
trouble
code
Abbreviation

osooos2

OBD
(FB
1)

PO
115


OBD
(FBI)

P0120
<
THV
>

OBD0063

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
.

2
.
READ
DIAGNOSTIC
TROUBLE
CODE
(DTC)
SHOWN

ON
DISPLAY
.
(MODE
FB1)

1)
Select
engine
mode
using
function
key
.

Press
thefunction
key
[0]
.

2)
Designate
mode
using
function
key
.

Press
[F]
[B]
[1]
[ENT]
in
that
order
.

3)
Ensure
diagnostic
trouble
code(s)
is
shown
.

(1)
When
there
is
only
one
diagnostic
trouble
code
.

(2)
When
there
are
multiple
diagnostic
trouble
codes
.

NOTE
:

For
details
concerning
diagnostic
trouble
codes,
referto

the
DIAGNOSTIC
TROUBLE
CODE
(DTC)
LIST,
2-7

[T11A0]*4
.

14

Z-T
[T3C37]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

LED
No
.
Signal
name
Display

1
-
-

2
-
-

3Neutralswitch
NT

4
--

5
--

s
--

7
Test
mode
connector
LID

8
Identification
of
AT
model
AT

9
Ignition
switchIG

r
0

-
-
NT
--

-
LID
AT
IG
-

ooooa

LEDNo
.
Signal
name
Display

1
Radiator
fan
relay
2
R2

2
Knock
signal
KS

Purge
control
solenoid

valve
CN

4
Fuel
pump
relay
FP

5
-
-

6
Radiator
fan
relay
1
R1
7
A/C
relay
AR

8
A/C
switch
AC

9
--

o
--

R2
KSCN
FP
-

R1
ARAC
--

37
.
FUNCTION
MODE
:
FAO

-
ON
H
OFF
SIGNAL
-

Requirement
for
LED
"ON"
.

LED
No
.
3
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
.

38
.
FUNCTION
MODE
:
FA1

-
ON
H
OFF
SIGNAL
-

Requirement
for
LED
"ON"
.

LEDNo
.
1
Radiator
fan
relay
2
is
turned
ON
.

LEDNo
.
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
:

9
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
.

e
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
functioningproperly
.

28

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

I
ST
I

1-1
ooaao0000000000oaooo

OBD0669A
I

ST2

00000
I
0
0
(03C03
0

~
00000
;
i~~
C01-

ST1

OBDD057A

9
Using
data
link
connector
for
Subaru
select
monitor

and
OBD-II
general
scan
tool
:

(1)
Connect
ST
to
Subaru
select
monitorcable
.

ST
498357200
ADAPTER
CABLE

(2)
Open
the
cover
and
connect
Subaru
select
moni-

torto
data
link
connector
located
in
thelower
portion

of
the
instrument
panel(on
the
driver'sside),to
the

lower
cover
.

CAUTION
:

Do
not
connect
scan
tools
except
for
Subaru
select
mon-

itor
and
OBD-II
general
scan
tool
.

6)
Turn
ignition
switch
to
ON
(engine
OFF)
and
Subaru

select
monitor
switch
to
ON
.

7)
Start
the
engine
.

NOTE
:

Ensure
the
selector
lever
is
placed
in
the
"P"
position

before
starting
.

8)
Using
the
selector
lever
or
shift
lever,
turn
the
"P"
posi-

tion
switch
and
the
"N"
position
switch
to
ON
.

9)
Depress
the
brake
pedal
to
turn
the
brake
switch
ON
.

10)
Keep
engine
speed
in
the
2,500-3,000
rpm
range
for

40
seconds
.

NOTE
:

On
models
without
tachometer,
usethe
Subaru
select

monitor
or
tachometer
(Secondary
pickup
type)
.

11)
Place
the
selector
lever
or
shift
lever
in
the
"D"
posi-

tion
and
drive
the
vehicle
at
5
to
10
km/h
(3to
6
MPH)
.

NOTE
:

On
AWD
vehicles,
release
the
parking
brake
.

F
:
COMPULSORY
VALVE
OPERATION
CHECK

MODE

1
.
SUBARU
SELECT
MONITOR

1)
Prepare
Subaru
select
monitor
and
cartridge
.

ST1
498307500
SELECT
MONITOR
KIT

ST2
498345700
CARTRIDGE

39

2-7
[rsai]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

6
.
Wiring
Diagram
and
Wiring
Harness

Engine
Shield
Boost
Throttle
coolant
joint
sensorposition
Knock
temperature
E
.G.R
.
connector
sensor
sensor
sensor
solenoid

BB3
FF
R
I
B2
H
I
(
:
P
P
(:
9
)
PEE
(
ED
EH
(
9
)

....

E2

821

Ref
.
toAT
control
system
.

Enginecontro
I
B84
module

....

822

E3

B3

Mess
air
flowsensor

.
.
..
..
..
III

(Ca
I
(forn
(a
mode
I)
arri

813
m
EE

Ignitor
O

(Brown)
El8
E8
(Brown)
(B
I
eck)
B2
El3
(Brown)

12
123

B3
(Grey)(
ED
(Grey)

1234
123456

52

Ell
(Gray)

123

B2l
(L
i
ght
gray)

1234
5678
910U12

Ell

Ignition
coil

B83

1234

B22
CL
i
ght
gray)

1234
5678
9
1011
12
13141516

BUR10-02C

s-3
[D6013]

6
.
Wiring
Diagram

WIRING
DIAGRAM

Engine
Shield
Boost
Throttle
coolant
point
sensor
position
Knock
temperature
E
.G.R
.
connector
sensor
sensor
sensor
solenoid

B83
H
I
B2
~~
E13
PI
E14
m
I
E8
~I
ElB

..

E2

B21

Ref
.
toAT(
;;
control
system
.

Enginecontro
I
884
module

.
.
..

822
m
mv

E3
m~~;
(Ca
I
i
forn
t
a
mode
l
)

W-
M--
(
9
)
F-F-M-
(
:
9D

Mess
air
Ignitor
flowsensor

(Brown)
E18
E8
(Brown)(Black)
B2
El3
(Brown)

12
123

B3
(Grey)
Bl3
(Gray)

12345123456

Ell
mm
EE

GE
Ignition
coil

E!2
(Gray)

123

82l
(L
i
ght
gray)

1234
5678
9101112

B83

1234

B22
(L
i
ght
gray)

6278
S

1

34

9
101112
3141516
1a

BUR10-02C

14

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[rsi2]
2-7
8
.
Diagnostics
for
Engine
Starting
Failure

WIRING
DIAGRAM
:

Fuel
pump

M

R58
S
.M
.J
.

R67R46
R1
897

E

B84

ECM

Fuel
pump
relay

0

846

SBF-2

No
.16
~b---

862F45

884

9
10
1112
13141516
R58
R61B46

3132
333435363738
39
40
4142
43
44585960
6162
6364
6566
6768
6910
1
2
3
~1
]
M34
1
84
1
8
51
86
1
871
88
1
89
1
90
1
91
1
92
1
93
1
94
1
95
1
96
1
4
56~J

82M
1014

PUMpK

OPERATING
SOUND
OFFUEL
811
CHEC

R58

OBD0132A

Make
sure
that
fuel
pump
isin
operation
for
two
seconds

when
turning
ignition
switch
to
ON
.

CHECK
:
Does
fuel
pump
produce
operating
sound?

NOTE
:

Fuel
pump
operation
check
can
also
beexecuted
using

Subaru
Select
Monitor
(Function
mode
:
FD01)
.

For
the
procedure,
referto
"COMPULSORY
VALVE
OPER-
ATION
CHECK
MODE"
2-7
[T3F0]*4
.

,res
:
Check
fuel
injector
circuit
.
<
Ref
.
to
2-7

[T10Q0].*2
>

No
:
Go
to
step
812
.
1
812
CHECK
GROUND
CIRCUIT
OF
FUEL
PUMP
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
fuel
pump
.

3)
Measure
resistance
of
harness
connector
between
fuel

pump
and
chassis
ground
.

CHECK
:
Connector
&
terminal

(R58)
No
.
4
-
Chassis
ground
:

Is
the
resistance
less
than
5
S2?

5

2-7
[T10BOa]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

OBD
(FBI)

P0180


H2M1306

BO
:
DTC
P0180

-
FUEL
TEMPERATURE
SENSOR
A
CIRCUIT

MALFUNCTION
(TNKT)
-

DTC
DETECTING
CONDITION
:

e
Immediately
at
fault
recognition

10801
Connect
Subaru
Select
Monitor
or
the

OBD-11
general
scan
tool,
and
read
data
.

10802
Check
harness
between
fuel
temperature

sensor
and
ECM
connector
.

10B03
Check
harness
between
fuel
temperature

sensor
and
ECM
connector
.

CAUTION
:

After
repair
or
replacement
of
faultyparts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

<
Ref
.
to
2-7
[T3D0]
and
[T3E0]
.*2
and
*4
>

10

2_7
[T10BS0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
DiagnosticsChart
with
Trouble
Code

OBD
(FBI)

P0450

H2M1372

BS
:
DTC
P0450

-
EVAPORATIVE
EMISSION
CONTROL

SYSTEM
PRESSURE
SENSOR
MALFUNCTION

(TNKP)
-

DTC
DETECTING
CONDITION
:

9
Immediately
atfault
recognition

10BSi
I
Connect
Subaru
Select
Monitor
or
the

OBD-II
general
scan
toot,
and
read
data
.

Check
inputsignal
for
ECM
.
(Using

10BS2
voltage
meter
and
Subaru
Select

Monitor
.)

10BS3
I
Check
harness
between
ECM
and
fuel

tank
pressure
sensor
connector
.

10BS4
Check
harnessbetween
ECM
and
fuel
tank
pressuresensor
connector
.

CAUTION
:

Afterrepair
or
replacement
of
faultyparts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

<
Ref
.
to
2-7
[T3D0]
and
[T3E0]
.*2
and
*4
>

28

WIRING
DIAGRAM
[D6013]
6-3

6
.
Wiring
Diagram

Data
link
connector
Testmode

878B75
~
B76

YJ
J
~mm
L
J

)
Ref
.
toAir
/
conditioning
system
.

1
Re
f
.to
Radiator
/
fan
system
.

Ref
.
toAT
control
J
system
.

L

F
d'
3L
a0J
mo
O
~VI~
f~
MP

Enginecontro
I
BB4
module

m
>rCD
J3
3

F
.
.
..
--
~
-

S
'
K
J
'
B19
'-
818
v
--
Bl9
rl
CE

r
......

T5
~
..
....

T6

Front
Pressure
sources
oxygen
switchfr
sensor
~
.,
i
o
.,
.

B75
(Green)

2

B78
(Ye
I
low)

12
34
56789

Rear
oxygen
sensor
(California
model)

876
(Green)

2

Rear
oxygensensor
(Other
models)

Bl
(Brown)

12

818
(De
rk
gray)

21
3
OBD-
11
service
connector

N~
BGO

valve

9

(Gray)
T6
Bl9

21
43

840
(Gray)
B84
(L
1
ght
b
I
ue)

1
2
34
56
78
9l0
llt213141516

1
1
1
2
1
3
1
4
1
5
1
6
1
7
8
t718192021222324252627282930
3132
3334
3S
I
36
1
37
1
38
1
39
1
40
1
41
1
44445464748
49
50
5152
535455565758
59
60
6162
1
63
1
64
1
65
1
66
1
67
1
68
1
6
9
70
1
9
1
10
1
11
1
12
1
13
1
14
1
151671
1
72
1
73
1
74
1
75
1
76
1
77
1
78
1
79
1
80
1
81
1
82
1
83
1
84
85
86
87
88
1
89
1
9
0
1,
192
939495
96

BUR10-03B

a

6-3
[D6013]
WIRING
DIAGRAM

6
.
Wiring
Diagram

Shield
joint
connector

rE
~
;EB
(
883

E2

B21

Ref
.
toAT
control
system
.

Pressuresensor

....

Englnecontro
I
gg4
module

....

B22

E3

(California
model)

B3
~+~M
B13

Mass
air
Ignitor
flowsensor

(Brown)
E18
E8
(Brown)
(B
I
ack)
B2
E13
(Brown)

12
123

B3
(Grey)
Bl3
(Gray)

12345123456

Ell
(Gray)

123

B21
(L
i
ght
gray)

1234
5678
9
10
ll
l2

Ell

Ignition
coil

883

1234

B22
(L
i
ght
gray)

1
234
S678
9
101112
1
41516
3
fili

BURIO-03C

Eng
i
ne
Throttle
coolant
position
Knock
temperature
E
.
G
.
R
.
sensor
sensor
sensor
solenoid

1
:1
I---I
[--J
[--J