Page 150 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T10M5]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
iomi
CHECK
(FREE
YFOR
THE
AILONG
TIMEVE
TURNED
CHECK
:
Check
if
the
wheels
have
been
turned
freely
for
more
th SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T10M5]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
iomi
CHECK
(FREE
YFOR
THE
AILONG
TIMEVE
TURNED
CHECK
:
Check
if
the
wheels
have
been
turned
freely
for
more
th](/manual-img/17/57434/w960_57434-149.png)
BRAKES
[ABS
5
.31
TYPE]
[T10M5]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
iomi
CHECK
(FREE
Y'FOR
THE
AILONG
TIMEVE
TURNED
CHECK
:
Check
if
the
wheels
have
been
turned
freely
for
more
than
one
minute,
suchas
when
the
vehicle
is
jacked-up,
under
full-lock
corner-
ing
or
when
fire
is
not
in
contact
with
road
surface
.
,rES
:
The
ABS
is
normal
.
Erase
the
trouble
code
.
NOTE
:
When
the
wheels
turn
freelyfor
a
long
time,
such
as
when
the
vehicle
is
towed
or
jacked-up,
or
when
steering
wheel
is
continuously
turned
all
the
way,
this
trouble
code
may
sometimes
occur
.
No
:
Go
to
step
10M2
.
10M2
CHECK
TIRE
SPECIFICATIONS
.
Turn
ignition
switch
to
OFF
.
CHECK
:
Are
the
fire
specifications
correct?
,rES
:
Go
to
step
10M3
.
No
:
Replace
tire
.
1
10M3
I
CHECK
WEAR
OF
TIRE
.
Is
the
fire
worn
excessively?
vES
:
Replace
tire
.
No
:
Go
to
step
10M4
.
1
10M4
I
CHECK
TIRE
PRESSURE
.
CHECK
:
Is
the
fire
pressure
correct?
Go
to
step
10M5
.
No
:
Adjust
fire
pressure
.
1
10M5
I
CHECK
INSTALLATION
OF
ABS
SENSOR
.
Tightening
torque
:
32
f
10
N~m
(3
.3
f
1
.0
kg-m,
24
f
7
ft-Ib)
CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-
ened
securely?
,rES
:
Go
to
step
10M6
.
No
:
Tighten
ABS
sensor
installation
bolts
securely
.
133
Page 151 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
4-4d
[rionns1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
G4M0700
I
G4M0701
I
1
101111116
I
CHECK
INSTALLATION
OF
TONE
WHEEL
.
Tightening
torque
:
13
±
3
N~m
(1.3
f
0
.3
k SUBARU LEGACY 1997 Service Repair Manual
4-4d
[rionns1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
G4M0700
I
G4M0701
I
1
101111116
I
CHECK
INSTALLATION
OF
TONE
WHEEL
.
Tightening
torque
:
13
±
3
N~m
(1.3
f
0
.3
k](/manual-img/17/57434/w960_57434-150.png)
4-4d
[rionns1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
G4M0700
I
G4M0701
I
1
101111116
I
CHECK
INSTALLATION
OF
TONE
WHEEL
.
Tightening
torque
:
13
±
3
N~m
(1.3
f
0
.3
kg-m,
9
±
2
.2
ft-Ib)
CHECK
:
Are
thetone
wheel
installation
bolts
tight-
ened
securely?
,rES
:
Go
to
step
10M7
.
No
:
Tightentone
wheel
installation
bolts
securely
.
CHECK
ABS
SENSOR
GAP
.
Measure
tone
wheel
to
pole
piece
gap
over
entire
perim-
eterof
the
wheel
.
CHECK
:
Is
the
gap
within
the
specifications
shown
in
the
following
fable?
Front
wheel
Rear
wheel
Specifications
0
.9
-
1
.4
mm
(0
.035
-
0
.055
in)
0
.7
-
1
.2
mm
(0
.028
-
0
.047
in)
Go
tostep
10M8
.
No
:
Adjustthe
gap
.
NOTE
:
Adjustthe
gap
using
spacer
(Part
No
.
26755AA000)
.
If
spacers
cannot
correct
the
gap,
replace
worn
sensor
or
worn
tone
wheel
.
1111011111118
1
CHECK
OSCILLOSCOPE
.
I
i
CHECK
:
Is
an
oscilloscope
available?
Go
to
step
10M9
.
No
:
Go
to
step
10M10
.
10M9
CHECK
ABS
SENSOR
SIGNAL
.
1)
Raise
all
four
wheels
of
ground
.
2)
Turn
ignition
switch
OFF
.
3)
Connect
the
oscilloscope
to
the
connector
(F1)
or
con
nector
(B100)
in
accordance
with
trouble
code
.
4)
Turn
ignition
switch
ON
.
134
Sensor
gap
Sensor
gap
Page 152 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T10M12]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
5)
Rotate
wheels
and
measure
voltage
at
specified
fre-
quency
.
NOTE
:
When
this
inspection
is
completed,
the
ABS SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T10M12]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
5)
Rotate
wheels
and
measure
voltage
at
specified
fre-
quency
.
NOTE
:
When
this
inspection
is
completed,
the
ABS](/manual-img/17/57434/w960_57434-151.png)
BRAKES
[ABS
5
.3i
TYPE]
[T10M12]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
5)
Rotate
wheels
and
measure
voltage
at
specified
fre-
quency
.
NOTE
:
When
this
inspection
is
completed,
the
ABSCM&H/U
sometimes
stores
the
trouble
code
29
.
Connector
&
terminal
(8100)
No
.
12
(+)
-
No
.
13
(-)
(Front
RH)
:
(8100)
No
.
3
(+)
-
No
.
4
()
(Front
LH)
:
(F1)
No
.
4
(+)
-
No
.
5
(
)
(Rear
RH)
:
(F1)
No
.
1
(+)
-
No
.
2
(
)
(Rear
LH)
:
Specified
voltage
:
0
.12
-
1
V
(When
it
is
20
Hz
.)
CHECK
:
Is
oscilloscopepattern
smooth,
as
shown
in
figure?
Go
to
step
8M13
.
No
:
Go
to
step
8M10
.
I10M10
CHECK
I
OR
TONE
CONTAM
WHEELINATION
OF
ABS
SENSOR
Remove
disc
rotor
from
hub
.
CHECK
:
Is
the
ABS
sensor
pole
piece
or
the
tone
wheel
contaminated
by
dirt
or
other
foreign
matter?
,rES
:
Thoroughly
remove
dirt
or
other
foreign
matter
.
No
:
Go
to
step
10M11
.
10M11
CHECK
I
TONE
WHEEL
.
GE
OF
ABS
SENSOR
OR
CHECK
:
Are
there
broken
or
damaged
teeth
in
the
ABS
sensor
pole
piece
or
the
tone
wheel?
,res
:
Replace
ABS
sensor
or
tone
wheel
.
No
:
Go
to
step
10M12
.
10M12
CHECK
HUB
RUNOUT
.
Measure
hub
runout
.
CHECK
;
Is
the
runouf
less
than
0
.05
mm
(0
.0020
in)?
Go
to
step
10M13
.
No
:
Repair
hub
.
135
Page 163 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T10V5]4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
a
112131415161718
01112131415
11611711811912
1
23
24
2526
71
28
1
2130
1
31
1
1
La
-_
B4M
1243A
1
110111
CHECK
GROU SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T10V5]4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
a
112131415161718
01112131415
11611711811912
1
23
24
2526
71
28
1
2130
1
31
1
1
La
-_
B4M
1243A
1
110111
CHECK
GROU](/manual-img/17/57434/w960_57434-162.png)
BRAKES
[ABS
5
.3i
TYPE]
[T10V5]4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
a
112131415161718
01112131415
11611711811912
1
23
24
2526
71
28
1
2130
1
31
1
1
La
-_
B4M
1243A
1
110111
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
ABSCM&H/U
.
3)
Measure
resistance
between
ABSCM&H/U
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
23
-
Chassis
ground
:
CHECK
:
Is
the
resistance
less
than0
.5
S2?
YES
:
Go
to
step
10V2
.
No
:
Repair
ABSCM&H/U
ground
harness
.
CHECK
POOR
CONTACT
IN
CONNECTORS
.
CHECK
:
Is
there
poor
contact
in
connectors
between
battery,
ignition
switch
and
ABSCM&HIU?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>
Repair
connector
.
No
:
Go
to
step
10V3
.
10V3
CHECK
SOURCES
OF
SIGNAL
NOISE
.
CHECK
:
Is
thecar
telephone
orthe
wireless
transmit-
ter
properly
installed?
vES
:
Go
to
step
110114
.
No
:
Properly
install
the
car
telephone
or
the
wireless
transmitter
.
1
110114
I
CHECK
SOURCES
OF
SIGNAL
NOISE
.
I
CHECK
;
Are
noise
sources
(such
as
an
antenna)
installed
near
the
sensorharness?
.rES
:
Install
the
noise
sources
apart
from
the
sensor
harness
.
No
:
Go
to
step
10V5
.
10V5
CHECK
ABSCM&H/U
.
1)
Turn
ignition
switch
to
OFF
.
2)
Connect
all
connectors
.
3)
Erase
the
memory
.
4)
Perform
inspection
mode
.
5)
Read
outthe
trouble
code
.
CHECK
:
Is
the
same
trouble
codeas
in
the
current
diagnosis
still
being
output?
Replace
ABSCM&H/U
.
No
:
Go
to
step
10V6
.
147
Page 194 of 3342
4-4d
[rlonGO]
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
with
Select
Monitor
D
"
NEW
56
(FBI)
G
SENSOR
LINE
84M0974
AG
:
TROUBLE
CODE
56
G
SENSOR
LINE
-
OPEN
OR
SHORT
CIRCUIT
OF
G
SENSOR
-
DIAGNOSIS
:
9
Faulty
G
sensoroutput
voltage
TROUBLE
SYMPTOM
:
*
ABS
does
notoperate
.
WIRING
DIAGRAM
:
F49
ABS
control
module
and
hydraulic
control
unit
fi
P11
1
3
45678
P11
-
J
~
ABS
G
sensor
Mft
F49
131415
123456789101112
1
16
1
17
1
18
1
19
1
20
1
2
27
12
8
1
29
1
30
1
31
1
1
1
22
1
2324
5
26
B4M1260
186
Page 195 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T10AG5]
4-4d
10
.
DiagnosticsChart
with
Select
Monitor
1997
(F00)
ABS
4WD
"
AT
H4M
11171
G-SENS
(F
10)
2
.30
V
sannos271
10AG1
HECK
I
US
G
SE
ECT,MONT
OR
OF
ABSC SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T10AG5]
4-4d
10
.
DiagnosticsChart
with
Select
Monitor
1997
(F00)
ABS
4WD
"
AT
H4M
11171
G-SENS
(F
10)
2
.30
V
sannos271
10AG1
HECK
I
US
G
SE
ECT,MONT
OR
OF
ABSC](/manual-img/17/57434/w960_57434-194.png)
BRAKES
[ABS
5
.31
TYPE]
[T10AG5]
4-4d
10
.
DiagnosticsChart
with
Select
Monitor
1997
(F00)
ABS
4WD
"
AT
H4M
11171
G-SENS
(F
10)
2
.30
V
sannos271
10AG1
HECK
I
US
G
SE
ECT,MONT
OR
OF
ABSCM&H/U
1)
Press
[F],
[0]
and
[0]
on
the
select
monitor
.
2)
Read
the
select
monitor
display
.
CH~K
:
Is
an
ABSCM&HlU
for
4WD
model
installed
on
a
FWD
model?
Replace
ABSCM&H/U
.
No
:
Go
to
step
10AG2
.
I10AG2
CHECK
OUTPUT
I
SELECT
MONITOR
F
G
SENSOR
USING
1)
Press
[F],
[1]
and
[0]
on
the
select
monitor
.
2)
Read
the
select
monitor
display
.
K
:
Is
theindicated
reading
between
2
.1
and
2
.5
V
when
the
G
sensor
is
in
horizontal
posi-
tion?
,rE$
:
Go
to
step
10AG3
.
Go
to
step
10AG6
.
I
10AG3
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.
CHECK
:
Is
there
poor
contact
in
connector
between
ABSCM&HIU
and
G
sensor?
<
Ref
.
to
FORE-
WORD
[T3C1]
.*10
>
Repair
connector
.
No
:
Go
tostep
10AG4
.
10AG4
CHECK
ABSCM&HlU
.
1)
Connect
all
connectors
.
2)
Erase
the
memory
.
3)
Perform
inspection
mode
.
4)
Read
out
the
trouble
code
.
c
:
Is
the
same
trouble
code
as
in
thecurrent
diagnosis
still
being
output?
Replace
ABSCM&H1U
.
No
:
Go
to
step
i0AG5
.
10AG5
CHECK
ANY
I
APPEARANCE
.THER
TROUBLE
CODES
CHECK
:
Are
other
trouble
codes
being
output?
Proceed
withthe
diagnosis
corresponding
to
the
trouble
code
.
A
temporary
poor
contact
.
187
Page 197 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE][T10AG14]
4-4d
10
.
Diagnostics
Chart
withSelect
Monitor
F49
1
23456
7
89
07112131415
1617118119120121122l--,
2
1
3
2425
2630
0
S2
B4M1261A
10AG11
I
PUT
HARNESS
A
DuGROUN SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE][T10AG14]
4-4d
10
.
Diagnostics
Chart
withSelect
Monitor
F49
1
23456
7
89
07112131415
1617118119120121122l--,
2
1
3
2425
2630
0
S2
B4M1261A
10AG11
I
PUT
HARNESS
A
DuGROUN](/manual-img/17/57434/w960_57434-196.png)
BRAKES
[ABS
5
.31
TYPE][T10AG14]
4-4d
10
.
Diagnostics
Chart
withSelect
Monitor
F49
1
23456
7
89
07112131415
1617118119120121122l--,
2
1
3
2425
2630
0
S2
B4M1261A
10AG11
I
PUT
HARNESS
A
DuGROUND
HARNESS
.T
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
ABSCM&H/U
.
3)
Measure
resistance
between
ABSCM&H/U
connector
terminals
.
Connector
&
terminal
(F49)
No
.
30
-
No
.
28
:
CHECK
:
Is
theresistance
between
4
.3
and
4
.9
kSZ?
Go
to
step
10AG12
.
No
:
Repair
harness/connector
between
G
sensor
and
ABSCM&H/U
.
I
10AG12
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.
Is
there
poor
contact
in
connector
between
ABSCM&HlU
and
G
sensor?
<
ReL
to
FORE-
WORD
[T3C1].*T
0
>
Repair
connector
.
No
:
Go
to
step
10AG13
.
f
10AG13
I
CHECK
ABSCM&H/U
.
1)
Connect
all
connectors
.
2)
Erase
the
memory
.
3)
Perform
inspection
mode
.
4)
Read
out
the
trouble
code
.
CHECK
:
Is
the
same
trouble
code
as
in
the
current
diagnosis
still
being
output?
Replace
ABSCM&H/U
.
No
:
Go
to
step
10AG14
.
10AG14
CHECK
ANY
OTHER
TROUBLE
CODES
APPEARANCE
.
CHECK
:
Are
other
trouble
codes
being
output?
0
:
Proceed
with
thediagnosis
corresponding
to
the
trouble
code
.
No
:
A
temporary
poor
contact
.
189
Page 198 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
4-4d
[T70AG15]
BRAKES
[ABS
5
.3i
TYPE]
10
.
Diagnostics
Chart
with
Select
Monitor
V_
B4MO91
1
B
1
2
3
4
567
89
1011
131415
1017118119120121
23
242526
8
301
D
S2
B4M
1261
A
I
10AG15
1
CHECK
INP SUBARU LEGACY 1997 Service Repair Manual
4-4d
[T70AG15]
BRAKES
[ABS
5
.3i
TYPE]
10
.
Diagnostics
Chart
with
Select
Monitor
V_
B4MO91
1
B
1
2
3
4
567
89
1011
131415
1017118119120121
23
242526
8
301
D
S2
B4M
1261
A
I
10AG15
1
CHECK
INP](/manual-img/17/57434/w960_57434-197.png)
4-4d
[T70AG15]
BRAKES
[ABS
5
.3i
TYPE]
10
.
Diagnostics
Chart
with
Select
Monitor
V_
B4MO91
1
B
1
2
3
4
567
89
1011
131415
1017118119120121
23
242526
8
301
D
S2
B4M
1261
A
I
10AG15
1
CHECK
INPUT
VOLTAGE
OF
G
SENSOR
.
1)
Turn
ignition
switch
to
OFF
.
2)
Remove
console
box
.
3)
Disconnect
G
sensor
from
body
.
(Do
not
disconnect
connector
.)
4)
Turn
ignition
switch
to
ON
.
5)
Measure
voltage
between
G
sensor
connector
termi-
nals
.
Connector
&
terminal
(P11)
No
.
i
(+)
-
No
.
3
(
)
:
CHECK
:
Is
the
voltage
between
4
.75
and
5
.25
V?
Go
to
step
10AG16
.
No
:
Repair
harness/connector
between
G
sensor
and
ABSCM&H/U
.
10AG16
I
P
UT
HARNESS
ANDUGROUND
HA
NESS
.T
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
ABSCM&H/U
.
3)
Measure
resistance
between
ABSCM&H/U
connector
terminals
.
Connector
&
terminal
(F49)
No
.
30
-
No
.
28
:
CHECK
:
Is
the
resistance
between
4
.3
and
4
.9
kS2?
,res
:
Go
to
step
10AG17
.
No
:
Repair
harness/connector
between
G
sensor
and
ABSCM&H/U
.
190