SUBARU LEGACY 1996 Service Manual Online

2-7
[T1002]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
General
Diagnostics
Table

2
.
FOR
AT

N
Problem
parts
r
N
co
o
`o

NNLd

L
dCyCy
to
yp
ZN
~
v¢
)
j
a
(~
rN
f7
LU

N0NN~
t
.N
L
O
O
O

v

OO
O
OOO
g
)
C~~
a
O7

O
E
~
G
.
Nm
d
0m
2]
NU
y
Y
N
O
E
O
a
y
"

~
y
A
7
E

m
7E

m
7E

m
7
E
d
a
~
m
C
~,
401

C
d
N

C
m
N
G
d
N
C
m
N

l0
,
O
$
N
C

a
l0

U
,N
1N
a
1
C
m
O~

U

aCUL
U
L
U
G7
U
d
D
m
r
L
O
V
UU
U
U
lL
C
l
`
L
~'
~~Z
C
m
~C
(q
CNCNC
~
.
C
_
0
v
d
>
0
>
0
~n
m
~n
~
L
0
x
U
¢
V
a
0
a
U
a
F
a
~n
Z
o
7
o
L
co
L
co
L
co
0
v
d
o

Symptom
1
23
4
567891011
112113
14151617
1819
20
.
21
22
123
2425
.26
27
28
29
Starter
does
not
rotate
when
select
lever
is
in
"P"
or
"N
."
;
starter
rotates
when
select
O
OOO
lever
is
"R","D",
"3"
or
"2
."

Abnormal
noise
when
selectlever
is
in
"P"
"
"
0O
or
N
.

Hissing
noiseoccurs
during
standing
starts
.
O

Noise
occurs
while
driving
in
"D,"
range
.

Noise
occurs
while
driving
in
"D2"
range
.

Noiseoccurswhile
driving
in
"D3"
range
.

Noise
occurswhile
driving
in
"D,"
range
.

Engine
stalls
while
shifting
from
one
range
0
to
another
.

Vehicle
moves
when
select
lever
isin
"N
."
p

Shock
occurs
when
select
lever
is
moved
""
"
"
O
O
O
from
N
to
D
.

Excessive
time
lag
occurs
when
select
(ever
""
""
Q
is
moved
from
ND
.
to

Shock
occurs
when
selectlever
is
moved
"
"""
OOO
from
N
to
R
.

Excessive
time
lag
occurs
when
selectlever""
"
N
to
"R
.
is
moved
from

Vehicle
does
not
start
in
any
shift
range
OO
(engine
revving
up)
.

Vehicle
does
not
start
in
any
shift
range
(engine
stall)
.

Vehicle
does
not
start
in
"R"
range
only
O
OO
(enginerevving
up)
.

Vehicle
does
not
start
in
"R"
range
only
(engine
stall)
.

Vehicle
doesnot
start
in
"D"
or
"3"range
(enginerevving
up)
.

Vehicle
does
not
start
in
"D",
"3"
or
"2"
range
(engine
revving
up)
.

Vehicle
does
not
start
in
"D",
"3"
or
"2"
range
(engine
stall)
.

Vehicle
starts
in
"R"
range
only
(enginerevving
up)
.

Acceleration
during
standing
starts
is
poor
O
O
(high
stall
rpm)
.

Acceleration
during
standing
starts
is
poor
(low
stall
rpm)
.

Acceleration
is
poor
when
selectlever
isin
"
"
range
(normal
stall
rpm)
.
"D
,
"3"
or"2

Acceleration
is
poor
when
selectlever
isin
"
(normal
stall
rpm)
.
"R

No
shift
occurs
from
1st
to
2ndgear
.
OOOOOOO

No
shift
occurs
from
2nd
to
3rd
gear
.
O
O

No
shift
occurs
from3rd
to
4th
gear
.
O
O
O
OO

No
"kick-down"
shifts
occur
.
OO

Engine
brake
is
noteffected
when
select"
"
0OOO
lever
is
in
range
.
3

1
23456
78
8
10
11
12
13
14
151
1617
~B
l
19~
~
21
22
~3
~24
f
25
r26
27T
28
~
29,

70

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T1002]
2-7

10
.
General
Diagnostics
Table

a0
00
0

U7V

r

O
O
''
E

Problem
parts
U
NQ
C0N~
L
U
V
N~
LLMLW
~~
~~
d
C~
.

~
L
O
f11
C~NE
CN
Oi
L
d
y
d
V,
?r
V~V
y
y
W
d
Oi
d
~
m~CCOaE~O
.
0
Q
CI
O
't
~
d
Y
N
~C
,
O
~
C
"
a
d
~~
~
"
N
a)
~

d
-
9-
d
E
rY
A
a

>d
U
)
,
>
,
~
O
4)

~
Ay
t
y
`

19
cp
"
l0
a

oU
~~
NN
m

m

"

dO
.
n
N
'

a
C
G
CO
yNd
01
`
(p
a
7
d
V
L
'C-6
3
Nd>
3;
.1]
~7QdC
U
7dj
C
7
U
7
U~
LL
~l
~C
07
C
Ol
i
j
OOUXQ
C3
C
lL
d
V1
-O
Ol
Z
R
m
O
J
N
S
C
O
G
O
p
O4~
7
O
~
dd
OC
D
1~
J
J...WWd

30
31
32
133134
35
136
37
138
139
40
.
4142
4344
45
46
47
48
4950.5152
.
53
.
5455
56
57
58
Symptom

Starter
does
not
rotate
when
select
lever
is
in
"P"
or
"N
."
;
starter
rotates
when
select
lever
is
"R","D",
"3"or"2
."

O
0
0
Abnormal
noise
when
select
lever
isin
"P"
"
N
."
or

O
Hissing
noise
occurs
during
standing
starts
.
OOOO
Noiseoccurswhile
driving
in
"0,"
range
.
O
O
O
O
Noise
occurswhile
driving
in
"D2"range
.
O
OO
Noise
occurs
while
driving
in
"D3"range
.
OO
O
O
Noise
occurs
while
driving
in
"D,"
range
.

OO
Engine
stalls
while
shifting
from
one
range
to
another
.

Vehicle
moves
when
select
levee
isin
"N
."

Shock
occurs
when
select
levee
is
moved
"
from
"N
to
"D
."

Excessive
time
lag
occurs
when
selectlever
is
moved
from
"N"
to
"D
.-

0
Shock
occurs
when
selectlever
is
moved
from
"N"
to
"R
."

OO
Excessive
time
lag
occurs
when
select
lever
"
is
moved
from
"N
to
"F
."

OO
O
OOOOO
O
O
Vehicle
does
not
start
in
any
shift
range
(engine
revving
up)
.

p
Vehicle
doesnot
start
in
any
shift
range
(engine
stall)
.

O
O
Vehicle
does
not
start
in
"R"
range
only
(enginerevving
up)
.

OO
Vehicle
does
not
start
in
"R"
range
only
(engine
stall)
.

Vehicle
does
not
start
in
"D"
or"3"
range
(enginerevving
up)
.

Vehicle
does
not
start
in
"D",
"3"
or
"2"
range
(enginerevving
up)
.

p
Vehicle
does
not
start
in
"D",
"3"
or
"2"
range
(engine
stall)
.

Vehicle
starts
In
"R"
range
only
(enginerevving
up)
.

OO
Acceleration
during
standing
starts
is
poor
(high
stall
rpm)
.

O00
Acceleration
during
standing
starts
is
poor
(low
stall
rpm)
.

O
OO
Acceleration
is
poor
when
selectlever
isin
"
""
D
,
"3
or
"2"range
(normal
stall
rpm)
.

OOOO
Acceleration
is
poor
when
selectlever
isin
"
"
R
(normal
stall
rpm)
.

O
No
shift
occursfrom
1st
to
2nd
gear
.
OO
No
shift
occurs
from2nd
to
3rdgear
.

O
No
shift
occurs
from
3rd
to
4th
gear
.

No
"kick-down"
shifts
occur
.
Enginebrake
is
not
effected
when
select
lever
isin
"3"
range
.

3031
32
33
3435
36
37383940
41
4243
44
45
46
47
4849
50
51
52
53
5455565758
71

2-7
Rioo2]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
General
Diagnostics
Table

41
Problem
parts
,-
CI,
~o
0
0-
N
N
N
L
yy
I
C

L
dCN
CN
f0
qp
ZNa
f0
j
¢m
r
NMLUr
7y
mr
'
~
.
`
.
"
UVUU
0
rJ
"
q0
N
d
N
dm
d
d
LY~O
.'~
O
LO
OO
O
~
d
OC
OC
~
OCOCOC
m
>
A
1
m~V>
d
O
~
OC
r
7
Uo
E
ym
y
m
~,
"
U

~
-
U
3
y

E
d

a
d
Y
i
N

m>
~

_m
>
E

_m
>
E

A>
E

a
E
d
m
om
y
0d
N
0m
N
d
0
N
d0
N
>
~
n
"
C
a
j
d
N
d
N

.
mo
N
CC
O
U
L
dU
L
d
d
m
G1
~
V~
0~a60U
0U
0V
0U

,

V-
F
C~
~
7
~
7
~L~L~t
C
O
41
dCWC~C~
WC~
T7
_v>>
~nv~~n
.
r-
xaaa
a
a
in
o
o
(D(ncn
voMPP
P
o

Symptom
1
2
345678910
11
12131415161718
,
19
2021
22
23
.24
25
1
26
1
27
28
29Engine
brake
is
noteffected
when
select
lever
isin
"3"
or
"2"range
.

Engine
brake
is
noteffected
when
select""
lever
isin
1
range
.

Shift
characteristics
areerroneous
.
OOOOOO

No
lock-up
occurs
.
OOOO

Vehicle
cannotbe
set
in
"D"
range
power
OO
mode
.

"D"
range
power
mode
cannotbe
released
.
OOO

Parking
brake
is
not
effected
.
OO

Shift
lever
cannot
be
moved
or
is
hard
to
"
"
move
from
P
range
.

Select
lever
is
hard
to
move
.
OOOO

Select
lever
is
too
light
to
move
(unreason-
OO
able
resistance)
.
ATF
spurts
out
.

Differential
oil
spurtsout
.

Differential
oil
level
changes
excessively
.

Odor
is
producedfrom
oil
supply
pipe
.
OO
Shock
occurs
when
selectlever
is
moved
""
"
"
OOO
O
OO
from
1
2
range
.
to

Slippage
occurs
when
selectlever
is
moved
"""
"
OOOOOO
from
1
to
2
range
.

Shock
occurs
when
selectlever
is
moved
"
""
"
OOOOOO
from
2
to
3
range
.

Slippage
occurs
when
selectlever
is
moved
""
O
OO
OOO
from
"2to
"3
range
.

Shock
occurs
when
select
lever
is
moved
"
"""
OOOOOO
from
4
range
.
3
to

Slippage
occurs
when
selectlever
is
moved
"
"
0OOOOO
to
"4from
"3
range
.

Shock
occurs
when
select
lever
is
moved
""
0OOO
O
from"3
to"2
range
.

Shock
occurs
when
selectlever
is
moved
"
UOOOO
from
"D
to
"1"
range
.

Shock
occurs
when
selectlever
is
moved
"
"
OO
O
OO
to"1
from"2
range
.

Shock
occurs
when
accelerator
pedal
is
O
OOO
O
released
at
medium
speeds
.

Vibration
occurs
during
straight-forward
OO
operation
.

Select
leveeslips
out
ofposition
during
acceleration
or
while
driving
onrough
ter-
OOO
U
rain
.

Vibration
occurs
during
turns
(tight
corner
"
OOOOOOOOO
"braking
phenomenon)
.

Front
wheel
slippage
occursduring
standing
OOOOOOOOOOO
starts
.

Vehicle
is
not
set
in
FWD
mode
.
O
O
vOO

1
23456i
7
8910
11T
21314
x
15
1
~
i
1819
~20
~
I
22226
272829

72

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T1002
2-7
10
.
General
Diagnostics
Table

3000
`
r
U
VO

o

O

c~
a
~°om
.
m
~
22
r
Problem
parts

p

C
o,

~
~
y

r

Y
7

v

~
y
Y
`m
~

~
dsE
C
T
o

O
C

o

r

°

d

Y
G
Cc
OC
fC
~
cd
M
c
l0
d
m
a
a
L
r
~m
Y
l0
d>d
~
UU
],
U
),
yp
~
!C
r
~
L
y
~
1
"
~
0r
!E
CU
U
~E
~
~
O
.m
0
Q7
A
c
dy
iN

a

>C3
41
L
m
Nd
IM
N
al

E7
~-
U
L

a

C
p~
N

>

~y
it
M3
~
7
N
7
7
a

~yC
"
Uaj
~
a
7
U

a
7
U

6
.
>
d
C7
~
C
C
w
C

OD
p
UQO~
0
~O2m
3
J
OC
OOD
EO
4
.
V
Q>D
F~-
JJ
lL
Q
IL
QO
OI
W~Wd

30
31
32
133
134
35
36
3738
39
40
41
4243
4445
46
47
48
49
50
5152
53
54
5556
57
58
Symptom

Engine
brake
is
noteffected
when
select"lever
isin
"3or
"2"
range
.

U
Enginebrake
is
not
effected
when
select
lever
isin
"1"
range
.

Shift
characteristics
are
erroneous
.

OO
No
lock-up
occurs
.
Vehicle
cannot
be
set
in
"D"
range
power
mode
.

"D"
range
power
mode
cannot
be
released
.
O
Parking
brake
is
noteffected
.
Shift
lever
cannotbe
moved
or
is
hard
to
move
from
"P"
range
.
Select
levee
is
hard
to
move
.

Select
lever
is
too
light
to
move
(unreason-
able
resistance)
.

O
ATF
spurts
out
.
O
Differential
oil
spurts
out
.
O
O
Differential
oil
level
changes
excessively
.

O
OO
1
0
1
0OO
Odor
is
produced
from
oil
supply
pipe
.

OOQ
Shock
occurs
when
selectlever
is
moved
"""
from
1
to"2
range
.

Slippage
occurs
when
selectlever
is
moved
"
from
"1to
"2"
range
.

nvOO
Shock
occurs
when
select
lever
is
moved
"
"
"
"
from
2to3
range
.

OO
Slippage
occurs
when
selectlever
is
moved
""
from"2
to"3
range
.

OOOO
Shock
occurs
when
selectlever
is
moved
""
""
from3
to
4range
.

p
Slippage
occurs
when
select
lever
is
moved
"
from
"3"
to
"4
range
.

OO
O
Shock
occurs
when
selectlever
is
moved
"
"
""
from
2
range
.
3
to

Shock
occurs
when
selectlever
is
moved
"
"""
from
D
to
1
range
.

OO
Shock
occurs
when
selectlever
is
moved
""""
from
2
1
range
.
to

OO
Shock
occurs
when
accelerator
pedal
is
released
at
medium
speeds
.

O
O
Vibration
occurs
during
straight-forward
operation
.

Select
lever
slips
out
of
position
during
acceleration
or
while
driving
on
rough
ter-rain
.

Vibration
occurs
during
turns
(tight
corner
"
"
braking
phenomenon)
.

Front
wheel
slippage
occurs
during
standing
starts
.

Vehicle
is
not
set
in
FWD
mode
.

30313233
3435
36
~
37
-1
38
-
I
39
i
40
I
41
r
42
i
43
-1
44
1
45
-1
46
47~
I
48
-
49
I
T
50
~f
51
I
52
I
556
I
57
I
58
I
I

73

2-T
[T11A0]
ON-BOARD
DIAGNOSTICS
11
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

11
.
Diagnostics
Chart
with
Trouble
Code
A
:
DIAGNOSTIC
TROUBLE
CODE
(DTC)
LIST

DTC

No
.

Abbreviation

(Subaru
select
monitor)Item
Page

P0100
QA
Mass
air
flow
sensor
circuit
malfunction
76

P0101
QA
-
RMass
air
flow
sensor
circuit
range/performance
problem
77

P0105
P
-
S
Pressure
sensor
circuit
malfunction
78

P0106
PS
-
R
Pressure
sensor
circuit
range/performance
problem
79

P0115
TW
Engine
coolant
temperature
sensor
circuit
malfunction
80

P0120
THV
Throttleposition
sensor
circuit
malfunction
81

P0121
TH
-
R
Throttleposition
sensor
circuit
range/performance
problem
82

P0125
TW
-
CL
Insufficient
coolant
temperature
for
closed
loop
fuel
control
83

P0130
F02
-
V
Front
oxygen
sensor
circuit
malfunction
84

P0133
F02
-
R
Front
oxygen
sensor
circuit
slowresponse
85

P0135
F02H
Front
oxygen
sensor
heater
circuit
malfunction
86

P0136
R02
-
V
Rear
oxygen
sensor
circuit
malfunction
87

P0139
R02
-
R
Rear
oxygen
sensor
circuit
slowresponse88

P0141
R02H
Rear
oxygen
sensor
heater
circuit
malfunction
89

P0170
FUEL
Fuel
trim
malfunction
90

P0201
INJ1Fuel
injector
circuit
malfunction
-
#1

P0202
INJ2Fuel
injector
circuit
malfunction
-
#2
91
P0203
INJ3Fuel
injector
circuit
malfunction
-
#3

P0204
INJ4Fuel
injector
circuit
malfunction
-
#4

P0301
MIS
-
1
Cylinder
1
misfire
detected

P0302
MIS
-
2
Cylinder
2
misfire
detected
2
P0303
MIS
-
3
Cylinder
3
misfire
detected
9

P0304
MIS
-
4
Cylinder
4
misfire
detected

P0325
KNOCK
Knock
sensor
circuit
malfunction
93

P0335
CRANK
Crankshaft
position
sensor
circuit
malfunction
94

P0340
CAM
Camshaft
position
sensor
circuit
malfunction
95

P0400
EGR
Exhaust
gas
recirculation
flow
malfunction
96

P0403
EGRSOL
Exhaust
gas
recirculation
circuit
malfunction
97

P0420
CAT
Catalyst
system
efficiency
below
threshold
98

P0441
CPC
-
F
Evaporative
emission
control
system
incorrect
purge
flow
99

P0443
CPC
Evaporative
emission
control
system
purge
control
valve
circuit
malfunction
100

P0500
VSP
Vehicle
speed
sensor
malfunction
101

P0505
ISC
Idle
control
system
malfunction
102

P0506
ISC
-
L
Idle
control
system
RPM
lower
than
expected
103

P0507
ISC
-
H
Idle
control
system
RPM
higher
than
expected
104

P0600
-
Serial
communication
link
malfunction
105

P0601
RAM
Internal
control
module
memory
check
sum
error
106

P0703
ATBRK
Brake
switch
input
malfunction
T
107
I

74

ON-BOARD
DIAGNOSTICS
11
SYSTEM
[T11aoj
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

DTC

No
.

Abbreviation

(Subaru
select
monitor)
Item
Page

P0705
ATRNG
Transmissionrange
sensor
circuit
malfunction
108

P0710
ATF
Transmission
fluid
temperature
sensor
circuit
malfunction
109

P0720
ATVSP
Output
speed
sensor
(vehicle
speed
sensor
1)
circuit
malfunction
110

P0725
ATNE
Engine
speed
input
circuit
malfunction
111

P0731
ATGR1
Gear
1
incorrect
ratio

P0732
ATGR2
Gear
2
incorrect
ratio
1
2
P0733
ATGR3
Gear
3
incorrect
ratio
1

P0734
ATGR4
Gear
4
incorrect
ratio

P0740
ATLU
-
F
Torque
converter
clutch
system
malfunction
114

P0743
ATLU
Torque
converter
clutch
system
(duty
solenoid
B)
electrical
115

P0748
ATPL
Pressure
control
solenoid
(duty
solenoid
A)
electrical
116

P0753
ATSFTi
Shift
solenoid
A
(shift
solenoid
1)
electrical
117

P0758
ATSFT2
Shift
solenoid
B
(shift
solenoid
2)
electrical
118

P0760
ATOVR
-
F
Shift
solenoid
C
(shift
solenoid
3)
malfunction
119

P0763
ATOVR
Shift
solenoid
C
(shift
solenoid
3)
electrical
120

P1100
ST
-
SW
Starter
switch
circuit
malfunction
121

P1101
N/P
-
SW
Neutral
position
switch
circuit
malfunction
122

P1102
BR
Pressure
sources
switching
solenoid
valve
circuit
malfunction
123

P1103
TRQ
Engine
torque
control
signal
circuit
malfunction
124

P1500
FAN
-
1
Radiator
fan
relay
1
circuit
malfunction
125

P1502
FAN
-
F
Radiator
fan
function
problem
126

P1700
ATTH
Throttle
position
sensor
circuit
malfunction
127

P1701
ATCRS
Cruise
control
set
signal
circuit
malfunction
128

P1702
ATDIAG
Automatic
transmission
diagnosis
inputsignal
circuit
malfunction
I
129
75

2-7
[T11B0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
11
.
Diagnostics
Chart
with
Trouble
Code

B
:
DTC
P0100

-
MASS
AIR
FLOW
SENSOR
CIRCUIT

MALFUNCTION
(QA)
-

WIRING
DIAGRAM
:

Main
relay

0
0

847

17
SBF-2
-
-
--
-
---
-
-
-
-
------
-
-
-
-
-
-
--
--------------------------11
ECM

E
(a
,~
a0
0

4
O
Mass
air
flow
sensor

12u34
u
56
u
78
u
1
234
171
192021
232
2526211
2
6
8

M56
4450
515
5355
59101112
7172
17576
77
7880
81
1
131
4
1516
1
2345

B2M0785

NOTE
:

For
the
diagnostic
procedure
on
mass
air
flow
sensor
cir-

cuit
malfunction
(DTC
P0100),
referto
2-7
[T10B0]*2
.

76

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T1ico]
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

C
:
DTC
P0101

-
MASS
AIR
FLOW
SENSOR
CIRCUIT

RANGE/PERFORMANCE
PROBLEM

(QA
-
R)
-

WIRING
DIAGRAM
:

Main
relay
0
0

B47

SBF-2

--------------------------11
'7

ECM

Ei
0
B12
0

O
Mass
a
ir
flowsensor

0

1
2u
4
u
56
u
78u
1234
1711920Zt
23
1526
271
34
6
8

M56
464
1
51152
153M
5
9101112
7112
747
76
7718
81
283
13141
16
1
234
5

82M0785

NOTE
:

For
the
diagnostic
procedure
on
mass
air
flow
sensor
cir-

cuit
range/performanceproblem
(DTC
P0101),
refer
to
2-7

[T10C0]*2
.

77

2-7
[TI
1D0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

D
:
DTC
P0105

-
PRESSURE
SENSOR
CIRCUIT

MALFUNCTION
(P
-
S)
-

WIRING
DIAGRAM
:

Main
rely
0
0
Pressure
sources
Pressure
switching
solenoid
sensor
valve

-it
r

O
CL~J
Bt
H
8~7

0

i2u3a
u
56u
78u--
u
~ot1
u
u
lt
1
1819
011
22
2168304~73447677
11
5

SBF-2

o
a,

123
~
5
6

e2nno7as
I

NOTE
:

For
the
diagnostic
procedure
on
pressure
sensor
circuit

malfunction
(DTC
P0105),
refer
to
2-7
[T10D0]*2
.

78

ON-BOARD
DIAGNOSTICS
11
SYSTEM
[T11EO]
2-7

11
.
DiagnosticsChart
with
Trouble
Code

E
:
DTC
P0106

-
PRESSURE
SENSOR
CIRCUIT

RANGE/PERFORMANCE
PROBLEM
(PS
-
R)
-

WIRING
DIAGRAM
:

OQ
e,
9

30
11
11
22
1

M
,5
6
14
1~1
3
~
r
--
u

B2M0786

NOTE
:

For
the
diagnostic
procedure
on
pressure
sensor
circuit

range/performance
problem
(DTC
P0106),
refer
to
2-7

[T10E0]*2
.

79