1997 SUBARU LEGACY ABS

4-4d
[TSES1
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

G4M0700
I

Rear
Sensor
gap

G4M0701

8E8
I
CHECK
INSTALLATION
OFTONE
WHEEL
.

Tightening
torque
:

13
f
3
N~m
(1.3
f
0
.3
kg-m,
9
f
2
.2
ft-Ib)

CHECK
:
Are
thetone
wheel
installation
bolts
tight-

ened
securely?

,rES
:
Go
to
step
8E9
.

No
:
Tightentone
wheel
installation
bolts
securely
.

8E9
I
CHECK
ABS
SENSOR
GAP
.

Measure
tone
wheel-to-pole
piece
gap
over
entire
perim-

eter
of
the
wheel
.

CHECK
;
Is
the
gap
within
the
specifications
shown
in

the
following
table?

Front
wheel
Rear
wheel

Specifications0
.9
-
1
.4
mm

(0
.035
-
0
.055
in)
0
.7
-
1
.2
mm

(0
.028
-
0
.047
in)

ves
:
Go
to
step
8E10
.

No
:
Adjust
the
gap
.

NOTE
:

Adjust
the
gap
using
spacers
(Part
No
.
26755AA000)
.
If

spacers
cannot
correct
the
gap,
replace
worn
sensor
or

worn
tone
wheel
.

8E10
CHECK
HUB
RUNOUT
.

Measure
hub
runout
.

CHECK
:
Is
the
runouf
less
than
0
.05
mm
(0
.0020
in)?

vES
:
Go
to
step
8E11
.

No
:
Repair
hub
.

36
Sensorgap

BRAKES
[ABS
5
.3i
TYPE]
[T8E13]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

Except
OUTBACK
model

1
2

D
L
S2

B4M0818E

OUTBACK
model

Front
Rear

1
2
J
T~
2
1
L
2

B4M1042C

CHECK
GROUND
SHORT
OF
ABS
SENSOR
.

1)
Turn
ignition
switch
to
ON
.

2)
Measure
resistance
between
ABS
sensor
and
chassis

ground
.

Terminal

Front
RH
No
.
1
-
Chassis
ground
:

Front
LH
No
.
1
-
Chassis
ground
:

Rear
RH
No
.
1
-
Chassis
ground
:

Rear
LHNo
.
1
-
Chassis
ground
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

,rES
:
Go
to
step
8E12
.

No
:
Replace
ABS
sensor
and
ABSCM&H/U
.

CHECK
GROUND
SHORT
OFHARNESS
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
connector
to
ABS
sensor
.

3)
Measure
resistance
between
ABSCM&H/U
connector

terminal
and
chassis
ground
.

Connector
&
terminal

Trouble
code
21
I
(F49)
No
.
11
-
Chassis
ground
:

Trouble
code
23
l
(F49)
No
.
9
-
Chassis
ground
:

Trouble
code
25
I
(F49)
No
.
14
-
Chassis
ground
:

Trouble
code
27
/
(F49)
No
.
7
-
Chassis
ground
:

CHECK
;
Is
the
resistance
more
than
1
MS2?

,rES
:
Go
to
step
8E13
.

No
:
Repair
harness
between
ABSCM&H/U
and
ABS

sensor
.

Replace
ABSCM&H/U
.

(CHECK
POOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connectors
between

ABSCM&HIU
and
ABS
sensor?
<
Ref
.
to

FOREWORD
[T3C1]
.*10
>

vES
:
Repair
connector
.

No
:
Go
to
step
8E14
.

37

4-4d
[T8E14]
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

I

-

f
8E14
CHECK
ABSCM&H/U
.

1)
Connect
all
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4)
Read
outthe
trouble
code
.

CHECK
:
Is
the
same
trouble
code
as
in
the
current

diagnosis
still
being
output?

ves
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
8E15
.

I8E1
5
CHECK
ANY

IAPPEARANCE

.THER
TROUBLE
CODES

Are
other
trouble
codes
being
output?

Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporarypoor
contact
.

NOTE
:

Check
harness

and
ABS
sensor
.

and
connectors
between
ABSCM&H/U

38

4-4d
[TSFO]
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

F
:
TROUBLE
CODE
22
(FRONT
RH)

G
:
TROUBLE
CODE
24
(FRONT
LH)

H
:
TROUBLE
CODE
26
(REAR
RH)

I
:
TROUBLE
CODE
28
(REAR
LH)

-
ABNORMAL
ABS
SENSOR
(ABNORMAL
ABS
SENSOR
SIGNAL)
-

DIAGNOSIS
:

"
Faulty
ABS
sensor
signal
(noise,
irregular
signal,
etc
.)

Faulty
harness/connector

TROUBLE
SYMPTOM
:

9
ABS
does
not
operate
.

WIRING
DIAGRAM
:

f49

ABS
control
module
and
hydraulic
control
unit

OUTBACK
withstep
OO
roof
model
815
86

LL
]
Iwl

_-^
B15

~
B~~
_____===_-r
m--~~
Front
ABS
~
sensorLH

----
---
-----------
Front
ABS
-
-
----------
[Z1-1
~
sensor
RH

Twisted
~-
wire
F1Pt
OO

Twisted
wire
~
::M

Ft
100

1
3
1
10
4
78

Rear
ABS
sensorLH

RearABS
sensor
RH

I
OUTBACK
withsteproof
model
I
I
~
I

RearABS
«7
sensor
LH

II

RearABS
j

BE
sensor
RH

L-
-
-
--
-
-
-
-
-
-
-
-
-
--
-

QD

1
1
~
131415
1
§
17181911011111211
14
1

J
116117118119120121
223
24
6
2718
2930
31

B4M1238

40

BRAKES
[ABS
5
.31
TYPE]
[T814]
4-4d

8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning
Light

G4M0700

G4M0701

811
1
CHECK
INSTALLATION
OF
ABS
SENSOR
.

Tightening
torque
:

32
f
10
N~m
(3
.3
+
1
.0
kg-m,
24
f
7
ft-Ib)

CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-

ened
securely?

vES
:
Go
to
step
812
.

No
:
Tighten
ABS
sensor
installation
bolts
securely
.

812
1
CHECK
INSTALLATION
OF
TONEWHEEL
.l

Tightening
torque
:

13
f
3
N
"
m
(1.3
f
0
.3
kg-m,
9
f
2
.2
ft-Ib)

CHECK
:
Are
the
tone
wheel
installation
bolts
tight-

ened
securely?

vES
:
Go
to
step
813
.

No
:
Tightentone
wheel
installation
bolts
securely
.

$13
I
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
table?

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)

0
:
Go
to
step
814
.

No
:
Adjust
the
gap
.

NOTE
:

Adjustthe
gap
using
spacer
(Part
No
.
26755AA000)
.
If

spacers
cannot
correct
the
gap,
replace
worn
sensor
or

worn
tone
wheel
.

1814
1
CHECK
OSCILLOSCOPE
.

Is
an
oscilloscopeavailable?

,res
:
Go
to
step
815
.

No
:
Go
to
step
816
.

41

Sensor
gap

Sensor
gap

4-4d
[Tsis1
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

8100
~
F1

98
7
6543
2
3
2
11
1918
76
5141
1211
1
45678

0

0
20
Hz

Standard
outputvoltage
:
0
.12
-
1
V
(When
it
is
20Hz
.)
134M
1242A

815
1
CHECK
ABS
SENSOR
SIGNAL
.

1)
Raise
all
four
wheels
of
ground
.

2)
Turn
ignition
switch
OFF
.

3)
Connect
theoscilloscope
to
the
connector
(F1)
or
con-

nector
(B100)
.

4)
Turn
ignition
switch
ON
.

5)
Rotate
wheels
and
measure
voltage
at
specified
fre-

quency
.

NOTE
:

When
this
inspection
is
completed,
the
ABS
control
mod-

ule
sometimes
stores
the
trouble
code
29
.

Connector
&
terminal

Trouble
code
22
l
(B100)
No
.
12
(+)
-
No
.
13
(-)
:

Trouble
code
24
l
(8100)
No
.
3
(+)
-
No
.
4
(-)
:

Trouble
code
26
l
(F1)
No
.
4
(+)
-
No
.
5
(-)
:

Trouble
code
28
l
(F1)
No
.
1
(+)
-
No
.
2
(
)
:

Specifiedvoltage
:
0
.12
-
1
V
(When
it
is
20
Hz
.)

CHECK
:
Is
oscilloscope
pattern
smooth,
as
shown
in

figure?

,rss
:
Go
to
step
819
.

No
:
Go
to
step
816
.

816
CHECK

ORTONE

CONTAM
WHEELINATION
OF
ABS
SENSOR

Remove
disc
rotor
or
drum
from
hub
in
accordance
with

trouble
code
.

NECK
:
Is
the
ABS
sensor
pole
piece
orthetone

wheel
contaminated
by
dirt
or
other
foreign

matter?

ves
:
Thoroughly
remove
dirt
or
other
foreign
matter
.

No
:
Go
to
step
817
.

817
CHECK

ONE
WHEEL
.

GEOF
ABS
SENSOR
OR

CHECK
:
Are
there
broken
or
damaged
in
the
ABS

sensor
pole
piece
orthe
tone
wheel?

,res
:
Replace
ABS
sensor
or
tone
wheel
.

No
:
Go
to
step
818
.

42

BRAKES
[ABS
5
.3i
TYPE]
[T8110]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

Except
OUTBACK
model

1
2

0

S2
B4MOSO6E

OUTBACK
model

Front
Rear

1
22
1

D

84M
1036C

Except
OUTBACK
model

1
2

L
j
134M0818E

OUTBACK
model

Front
Rear

1
2
2
1

D

L
-_
B4M1042C

818
1
CHECK
HUB
RUNOUT
.

Measure
hub
runout
.

CHECK
:
Is
the
runout
less
than
0
.05
mm
(0
.0020
in)?

vES
:
Go
to
step
819
.

No
:
Repair
hub
.

819
I
CHECK
RESISTANCE
OF
ABS
SENSOR
.

1)
Turn
ignition
switch
OFF
.

2)
Disconnect
connector
from
ABS
sensor
.

3)
Measure
resistance
between
ABS
sensor
connector
ter-

minals
.

Terminal

Front
RH
No
.
1
-
No
.
2

Front
LHNo
.
1
-
No
.
2
:

Rear
RH
No
.
1
-
No
.
2
:

Rear
LHNo
.
1
-
No
.
2

CHECK
:
Is
the
resistance
between
0
.8
and
1
.2
kS2?

Go
to
step
8110
.

No
:
Replace
ABS
sensor
.

18110
1
CHECK
GROUND
SHORT
OF°
ABS
SENSOR
.

Measure
resistance
between
ABS

ground
.

Terminal

Front
RH
No
.
1
-
Chassis
ground
:

Front
LHNo
.
1
-
Chassis
ground
.

Rear
RH
No
.
1
-
ChassisgrQUndr

Rear
LH=
No
.
1
-
Chassis
ground
:

se-near
and
chassis

oHEOK
:
Is
the
resistance
more
than
1
MO?

,rES
:
Go
to
step
8111
.

No
;:
Replace
ABS
sensor
.

43

4-4d
Crsiyyi
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

8111
CHECK
HARNESS/CONNECTOR
BETWEEN

ABSCM
AND
ABS
SENSOR
.

1)
Connect
connector
to
ABS
sensor
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Measure
resistance
at
ABSCM&H/U
connector
termi-

nals
.

Connector
&
terminal

Trouble
code
22
/
(F49)
No
.
11
-
No
.
12
:

Trouble
code
24
/
(F49)
No
.
9
-
No
.
10
:

Trouble
code
26
I
(F49)
No
.
14
-
No
.
15
:

Trouble
code
28
/
(F49)
No
.
7
-
No
.
8
:

CHECK
:
Is
the
resistance
between
0
.8
and
1
.2
kS2?

Go
to
step8112
.

No
:
Repair
harness/connector
between
ABSCM&H/U

and
ABS
sensor
.

F49

1
234
5
6
7
8
9101112131
15
1
16
1
1
~
1019
1
2
012
1
12
23
242526
728293031

S2
+84M1243A

CHECK
GROUND
SHORT
OF
HARNESS
.

Measure
resistance
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
22
I
(F49)
No
.
11
-
Chassis
ground
:

Trouble
code
24
/
(F49)
No
.
9
-
Chassis
ground
:

Trouble
code
26
/
(F49)
No
.
14
-
Chassis
ground
:

Trouble
code
28
I
(F49)
No
.
7
-
Chassis
ground
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

Go
to
step8113
.

No
:
Repair
harness/connector
between
ABSCM&H/U

and
ABS
sensor
.

813
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.

Measure
resistance
between
ABSCM&H/U
and
chassis

ground
.

Connector
&
terminal

(F49)
No
.
23
-
GND
:

i
:hIECK
:
Is
theresistance
less
than
0
.5
SZ?

Go
to
step
8114
.

No
:
Repair
ABSCM&H/U
ground
harness
.

44