SUBARU LEGACY 1997 Service Repair Manual

4-4d
[T1
01-111
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withselect
monitor

FR
(F05)

30
km/h

B4M0922

(SELECT

CHECK
OUTPUT
MONITOR

F
ABS
SENSOR
USING

Read
the
ABS
sensor
output
corresponding
to
the
faulty

system
in
the
select
monitor
function
mode
.

NOTE
:

The
select
monitor
display
shows
that
the
front
right
wheel

is
rotating
at
30
km/h
.

CHECK
:
Does
the
speed
indicated
on
the
display

change
in
response
to
the
speedometer

reading
during
acceleration/deceleration

when
the
steering
wheel
is
in
the
straight-

ahead
position?

Go
to
step
1012
.

No
:
Go
to
step
10L8
.

I1011-2
CHECK
POOR
CONTACT
IN
CONNECTORS
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
in
connectors
between

ABSCM&HfU
and
ABS
sensor?

,rES
:
Repair
connector
.

No
:
Go
to
step
10L3
.

10L3
I
CHECK
SOURCES
OF
SIGNAL
NOISE
.

CHECK
:
Is
the
cartelephone
orthe
wireless
transmit-

ter
properly
installed?

Go
to
step
10L4
.

No
:
Properly
install
the
car
telephone
or
the
wireless

transmitter
.

1
10L4
I
CHECK
SOURCES
OF
SIGNAL
NOISE
.

Are
noise
sources
(such
as
an
antenna)

installed
near
the
sensorharness?

Install
the
noise
sources
apartfromthe
sensor

harness
.

No
:
Go
to
step
10L5
.

124

BRAKES
[ABS
5
.31
TYPE]
[r1oLs1
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

8100

1
91817161
5
1
4
1
3
21
2
191
76
51
11
11

J

84M1244A

10L5
CHECK
SHIELD
CIRCUIT
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
all
connectors
.

3)
Measure
resistance
between
shield
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
22
I
(8100)
No
.
11
-
Chassis
ground
:

Trouble
code
24
!
(8100)
No
.
2
-
Chassis
ground
:

Trouble
code
26
l
Go
to
step
10L6
.

Trouble
code
28
I
Go
to
step
10L6
.

CHECK
:
Is
the
resistance
less
than0
.5
S2?

Go
to
step
10L6
.

No
:
Repair
shield
harness
.

10L6
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
10L7
.

10L7
CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
:
Are
othertrouble
codes
being
output?

Proceed
withthe
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
noise
interference
.

11011-8
1
CHECK
INSTALLATION
OF
ABS
SENSOR
.
I

Tightening
torque
:

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

Are
the
ABS
sensor
installation
bolts
tight-

ened
securely?

Go
to
step
10L9
.

Tighten
ABS
sensor
installation
bolts
securely
.

125

4-4d
[TIoL9]
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
with
Select
Monitor

G4M0700I

G4M0701
I

10L9
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?

vES
:
Go
to
step
10L10
.

No
:
Tighten
tone
wheel
installation
bolts
securely
.
1
10L10
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

Specifications
0
.9
-
1
.4
mm

(0
.035
-
0
.055
in)

0
.7
-
1
.2
mm

(0
.028
-
0
.047
in)

vES
:
Go
to
step
10L11
.

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
.
1
10L11
I
CHECK
OSCILLOSCOPE
.
I

CHECK
;
Is
an
oscilloscopeavailable?

,rES
:
Go
to
step
10L12
.

No
:
Go
to
step
10L13
.

1
10L12
I
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
.

126

t
Sensorgap
Sensorgap

BRAKES
[ABS
5
.31
TYPE]
[T10L15]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

B100
F1

1091918176151
~1
323
1~
45678

0

0
20
Hz

Standard
output
voltage
:
0
.12
-
1
V
(When
it
is
20
Hz
.)
B4M1242A

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

Trouble
code
22
I
(8100)
No
.
12
(+)
-
No
.
13
(-)
:

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

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

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

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

CHECK
:
Is
oscilloscope
pattern
smooth,
as
shown
in

figure?

Go
tostep
10L16
.

No
:
Go
to
step
10L13
.

I10L13
CHECK
I
ORTONE

CONTAM

WHEEL'

NATION
OF
ABS
SENSOR

Remove
disc
rotor
or
drum
from
hub
in
accordance
with

trouble
code
.

CHECK
:
Is
the
ABS
sensor
pole
piece
orthe
tone

wheel
contaminated
by
dirt
or
other
foreign

matter?

,rES
:
Thoroughly
remove
dirt
or
other
foreign
matter
.

Go
to
step
10L1114
.

I10L14
CHECK

I
ONE
WHEEL
.

GEOF
ABS
SENSOR
OR

CHECK
;
Are
there
broken
or
damaged
in
the
ABS

sensor
pole
piece
or
the
tone
wheel?

U
:
Replace
ABS
sensor
or
tone
wheel
.

No
:
Go
to
step
10L75
.

1
10L15
I
CHECK
HUB
RUNOUT
.

Measure
hub
runout
.

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

Go
tostep
10L16
.

No
:
Repair
hub
.

127

4-4d
[T1oLis1
BRAKES
[ABS
5
.3i
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

Except
OUTBACK
model

1
2

D

S2
B4M0806E

OUTBACK
model

Front
Rear

1
22
1

i
J

D

.0
0
.
B4M1036C

Except
OUTBACK
model

1
2

L
j
B4M0818E

OUTBACK
model

Front
Rear

1
22
1

D

134M
1042C

10L16
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
RHNo
.
1
-
No
.
2
:

Rear
LHNo
.
1
-
No
.
2
:

cF+ECK
:
Is
the
resistance
between
0
.8
and
1
.2
kS2?

Go
to
step
10L17
.

No
:
Replace
ABS
sensor
.

10L17
CHECK
GROUND
SHORT
OF
ABS
SENSOR
.

Measure
resistance
between
ABS
sensor
and
chassis

ground
.

Terminal

Front
RH
No
.
1
-
Chassis
ground
:

Front
LHNo
.
1
-
Chassis
ground
:

Rear
RH
No
.
1
-
Chassis
ground
:

Rear
LH
No
.
1
-
Chassis
ground
:

CHECK
;
Is
the
resistance
more
than1
MW

Go
to
step
10L18
.

No
:
Replace
ABS
sensor
.

128

BRAKES
[ABS
5
.31
TYPE]
[T10L20)
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

F49

1
1
2131415
1
6
1
7
1
89
101112131415
1
16
1
17
1
18
1
19
1
2
01
212
23
242526
La
728293031

-_
B4M
1243A
8
(CHECK
HARNESS/CONNECTOR
BETWEEN

ABSCM&H/U
ANDABS
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
l
(F49)
No
.
11
-
No
.
12
:

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

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

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

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

,rES
:
Go
to
step
10L19
.

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

and
ABS
sensor
.

1
10L19
I
CHECK
GROUND
SHORT
OF
HARNESS
.

Measure
resistance
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

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

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

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

Trouble
code
28
1
(F49)
No
.
7
-
Chassis
ground
:

CHECK
:
Is
the
resistance
more
than
1
MSZ?

,rES
:
Go
to
step
10L20
.

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

and
ABS
sensor
.

10L20
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.

Measure
resistance
between
ABSCM&H/U
and
chassis

ground
.

Connector
&
terminal

(F49)
No
.
23
-
GND
:

CHECK
:
Is
the
resistance
less
than0
.5
SZ?

,rES
:
Go
to
step
10L21
.

No
:
Repair
ABSCM&H/U
ground
harness
.

129

4-4d
[TioL2y1
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withSelect
monitor

8100

98
7161
F
5T43
J2~
.
1~2
191
7
6
5141
1
11
1

D

S2
0
.
ij

B4M
1244A

1021
I
CHECKPOOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connectors
between

ABSCM&HlU
and
ABS
sensor?
<
Ref
.
to

FOREWORD
[T3C1]
.*10
>

,res
:
Repair
connector
.

No
:
Go
to
step
10L22
.

1022
I
CHECK
SOURCES
OF
SIGNAL
NOISE
.

CHECK
:
Is
the
cartelephone
orthewireless
transmit-
ter
properly
installed?

,res
:
Go
to
step
10L23
.

No
:
Properly
install
the
car
telephone
or
the
wireless

transmitter
.

1
10L23
I
CHECK
SOURCES
OF
SIGNAL
NOISE
.

CHECK
:
Are
noise
sources
(such
as
an
antenna)

installed
near
the
sensorharness?

Install
the
noise
sources
apartfrom
the
sensor

harness
.

No
:
Go
tostep
10L24
.

10L24
CHECK
SHIELDCIRCUIT
.

1)
Connect
all
connectors
.

2)
Measure
resistance
between
shield
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
22
I
(8100)
No
.
11
-
Chassis
ground
:

Trouble
code
24
/
(8100)
No
.
2
-
Chassis
ground
:

Trouble
code
26
l
Go
to
step
10L25
.

Trouble
code
28
/
Go
to
step
10L25
.

CHECK
:
Is
the
resistance
less
than0
.5
S2?

vES
:
Go
tostep
10L25
.

No
:
Repair
shield
harness
.

130

BRAKES
[ABS
5
.31
TYPE]
[T10L26]
4-4d

10
.
Diagnostics
Chart
withSelect
Monitor

10L25
I
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?

,rES
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10L26
.

10L26
CHECK
ANY
I
APPEARANCE

.THER
TROUBLE
CODES

CHECK
;
Are
other
trouble
codes
being
output?

Proceed
withthe
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
noise
interference
.

131

4-4d
[T1onno]
BRAKES
[ABS
5
.3i
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

D
&#34;
NEW
29

EITHER
.
SS

(FBI)

SOFT

84M0952
J

M
:
TROUBLE
CODE
29
EITHER
.
SS
SOFT

-
ABNORMAL
ABS
SENSOR
SIGNAL
(ANY

ONE
OF
FOUR)
-

DIAGNOSIS
:

&#34;
Faulty
ABS
sensor
signal
(noise,
irregular
signal,
etc
.)

&#34;
Faulty
tone
wheel

&#34;
Wheels
turning
freely
for
a
long
time

TROUBLE
SYMPTOM
:

9
ABS
does
not
operate
.

WIRING
DIAGRAM
:

F19

ABS
control
module
and
hydraulic
control
unit

OUTBACK
withsteproof
model

(2D(E)(~D
QD

rll~9
No"111

100
--------
Front
ABS

F

V

----------

;
sensorl-H
LjJF

---

----------
Front
ABS

Twisted

-----
sensor
RH

wire
Ft
Pt
OO

RearABS
--~
sensor
LH

Twisted
wire

Rear
ABS
41
4
.
sensor
RH

P8

r----------------
I
OUTBACK
with
steproof
model
IIII
O~
I

RearABS
sensorLH

j
~
Rear
ABS
j
sensor
RH

I
~
I
L---------------J

Ft
8100

1121
3
1
10
45
78

f49

123456789101112131415
16171819
20
2122
23
2425
26
2728293031

B4M1238

132

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