1997 SUBARU LEGACY ABS

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

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

4-4d
[TIoM131
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
with
Select
Monitor

10M13
I
CHECK
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
all
connectors
.

3)
Erase
the
memory
.

4)
Perform
inspection
mode
.

5)
Read
out
the
trouble
code
.

CHECK
:
Is
the
same
trouble
codeas
in
thecurrent

diagnosis
still
being
output?

,res
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10M14
.

10M14
CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
:
Are
other
trouble
codes
being
output?

0
:
Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

136

4-4d
[T10N0]
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
with
Select
Monitor

D
"
NEW
31
(FBI)

FR
.
EV
VALVE

B4M0953

D
"
NEW
33
(FBI)

FL
.
EV
VALVE

84M0954

D
"
NEW
35
(FBI)

RR
.
EV
VALUE

B4M0955

D
"
NEW
37
(FBI)

RL
.
EV
VALVE

B4M0956

N
:
TROUBLE
CODE
31
FR
.
EV
VALVE

-
ABNORMAL
FRONT
RH
INLET
SOLENOID

VALVE
-

O
:
TROUBLE
CODE
33
FL
.
EV
VALVE

-
ABNORMAL
FRONT
LH
INLET
SOLENOID

VALVE
-

P
:
TROUBLE
CODE
35
RR
.
EV
VALVE

-
ABNORMAL
REARRH
INLET
SOLENOID
VALVE
-

Q
:
TROUBLE
CODE
37
RL
.
EV
VALVE

-
ABNORMAL
REAR
LH
INLET
SOLENOID

VALVE
-

138

BRAKES
[ABS
5
.31
TYPE]
[T10Q0]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

DIAGNOSIS
:

Faulty
harness/connector

Faulty
inlet
solenoid
valve

TROUBLE
SYMPTOM
:

9
ABS
does
notoperate
.

WIRING
DIAGRAM
:

F49
SBF-4
FL1
.258

ABS
control
module
and
hydraulic
control
unit

f2
B100
IGN
sw
No

Fuse

8100
F49

1234567891011113141
1
46
10
1
16
1
17
1
18
1
19
1
20
1
212
!23
242526
11121
1
161
18192
q
27
1
28
1
29
1
30
13
1
1

84M1245
I

139

Generator

4-4d
[T1oQil
BRAKES
[ABS
5
.31
TYPE]

10
.
DiagnosticsChart
with
Select
Monitor

1

112131415161718
0
11
121131141
5
116117118119120121
23
2425
26
7128129[301311
1

C
-_
B4M
1243A

1
1001
I
CHECK
INPUT
VOLTAGEOFABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connectorfrom
ABSCM&H/U
.

3)
Run
theengine
at
idle
.

4)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

(F49)
No
.
1
(+)
-
Chassis
ground
(-)
:

CHECK
;
Is
thevoltage
between
10
V
and
15
V?

,res
:
Go
to
step
1002
.

No
:
Repair
harness
connector
between
battery,
igni-

tion
switch
and
ABSCM&H/U
.

11002
1
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Measure
resistance
between
ABSCM&H/U
connector

and
chassis
ground
.

Connector
&
terminal

(F49)
No
.
23
-
Chassis
ground
:

CHECK
;
Is
the
resistance
less
than
0
.5
S2?

Go
to
step
1003
.

No
:
Repair
ABSCM&H/U
ground
harness
.

11003
1
CHECK
POOR
CONTACT
IN
CONNECTORS
.I

Is
there
poor
contact
in
connectors
between

generator,
battery
and
ABSCM&HlU?
<
Ref
.

to
FOREWORD
[T3CI]
.*10
>

Repair
connector
.

No
:
Go
to
step
10Q4
.

140

BRAKES
[ABS
5
.31
TYPE]
[T10Q5]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

~1004
l
CHECK
ABSCM&HIU
.

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
thecurrent

diagnosis
still
being
output?

Replace
ABSCM&H/U
.

No
:
Go
to
step
1005
.

CHECK
ANY

APPEARANCE

.THER
TROUBLE
CODES

5
I

Are
other
trouble
codes
being
output?

Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

141

4-4d
[T1oRO1
BRAKES
[ABS
5
.31
TYPE]

10
.
DiagnosticsChart
with
Select
Monitor

D
"
NEW
32
(FBI)

FR
.
AV
VALVE

84MO958
I

D
"
NEW
34
(FBI)

FL
.
AV
VALVE

B4M0959
I

D
"
NEW
36
(FBI)

RR
.
AV
VALVE

B4M0960
I

D
"
NEW
38
(FBI)

RL
.
AV
VALVE

B4M0961
J

R
:
TROUBLE
CODE
32
FR
.
AV
VALVE

-
ABNORMAL
FRONT
RH
OUTLET
SOLENOID

VALVE
-

S
:
TROUBLE
CODE
34
FL
.
AV
VALVE

-
ABNORMAL
FRONT
LH
OUTLET
SOLENOID

VALVE
-

T
:
TROUBLE
CODE
36
RR
.
AV
VALVE

-
ABNORMAL
REAR
RHOUTLET
SOLENOID

VALVE
-

U
:
TROUBLE
CODE
38
RL
.
AV
VALVE

-
ABNORMAL
REAR
LH
OUTLET
SOLENOID

VALVE
-

142