1997 SUBARU LEGACY remove

SERVICE
PROCEDURE
[w2sao1
4-4

25
.
ABS
Control
Module
and
Hydraulic
Control
Unit
(ABSCM&H/U)
[ABS
5
.3i
Type]

A
:
REMOVAL

1)
Disconnect
ground
cablefrom
battery
.

2)
Remove
air
intake
duct
fromengine
compartment
to

facilitate
removal
of
ABSCM&H/U
.

3)
Use
an
air-gun
to
get
rid
of
water
around
the

ABSCM&H/U
.

CAUTION
:

The
contact
will
be
insufficient
if
the
terminal
gets
wet
.

4)
Pull
on
the
lock
of
the
ABSCM&H/U
connector
to

remove
it
.

5)
Disconnect
connector
from
ABSCM&H/U
.

CAUTION
:

Be
careful
not
tolet
water
or
other
foreign
matter
con-

tact
the
ABSCM&H/U
terminal

6)
Unlock
cable
clip
.

7)
Disconnect
brake
pipes
from
ABSCM&H/U
.

CAUTION
:

Wrap
brake
pipes
with
vinyl
bag
to
avoid
spilling
brake

fluid
on
vehicle
body
.

8)
Remove
ABSCM&H/U
fromengine
compartment
.

CAUTION
:

9
ABSCM&H/U
cannotbe
disassembled
.
Do
not
attempt

to
loosen
bolts
and
nuts
.

"
Do
not
drop
or
bump
ABSCM&H/U
.

"
Do
not
turn
the
ABSCM&H/U
upside
down
or
place
it

on
its
side
.

*
Be
careful
to
prevent
foreign
particles
from
getting

into
ABSCM&H/U
.

9
Apply
acoat
of
rust-preventive
wax
(Nippeco
LT
or

GB)
to
bracket
attaching
bolt
after
tightening
.

*
Do
not
pull
harness
disconnecting
harness
connector
.

7

4-4
[w2sBO]
SERVICE
PROCEDURE

25
.
ABS
Control
Module
and
Hydraulic
Control
Unit
(ABSCM&H/U)
[ABS
5
.3i
Type]

B
:
INSPECTION

i
Mark

>
ABSCM&H/U
B4M
1248A

/Pressure
ga
u
ge
\
'
/\

B4M0633A

1)
Check
connected
and
fixed
condition
of
connector
.

2)
Check
specifications
of
the
mark
with
ABSCM&H/U
.

Mark
Model

C3
AWD
AT

C4
AWD
MT

C
:
CHECKING
THE
HYDRAULIC
UNIT
ABS

OPERATION

1
.
CHECKINGTHE
HYDRAULIC
UNIT
ABS
OPERATION

BY
PRESSURE
GAUGE

1)
Lift-up
vehicle
and
remove
wheels
.

2)
Disconnect
the
air
bleeder
screwsfrom
the
FL
andFR

caliper
bodies
.

3)
Connect
two
pressure
gauges
to
the
FL
andFR
cali-

perbodies
.

CAUTION
:

Pressure
gauges
used
exclusively
for
brake
fluid

must
be
used
.

e
Do
not
employ
pressure
gauge
previously
used
for

transmission
since
the
piston
seal
is
expanded
which

may
lead
to
malfunction
of
the
brake
.

NOTE
:

Wrap
sealing
tape
around
the
pressure
gauge
.

8

SERVICE
PROCEDURE
[w2scI]
4-4

25
.
ABS
Control
Module
and
Hydraulic
Control
Unit
(ABSCM&H/U)
[ABS
5
.3i
Type]

4)
Bleed
air
from
the
pressure
gauges
.

5)
Perform
ABS
sequence
control
.

Ref
.
to
[W25D0]
.*10
>

6)
When
thehydraulic
unit
begins
to
work,
and
first
the

FL
side
performs
decompression,
holding,
and

compression,
and
then
the
FR
side
performs

decompression,
holding,
and
compression
.

7)
Read
values
indicated
on
the
pressure
gauge
and

check
if
the
fluctuationof
the
values
between
decompres-

sion
and
compression
meets
the
standard
values
.
Also

check
if
any
irregular
brake
pedal
tightness
is
felt
.

Initial
value
When
decompressed
When
compressed

Front
wheel
3,432
kPa
(35
kg/cmz,
498
psi)
490kPa
(5
kg/cm2,
71
psi)
3,432
kPa
(35
kg/cm2,
498
psi)

or
less
or
more

Rear
wheel
3,432
kPa
(35
kg/cm2,
498
psi)
490kPa
(5
kg
/cm2,
71
psi)
3,432
kPa
(35
kg/cm2,
498
psi)

or
less
or
more

8)
Remove
pressure
gauges
from
FL
and
FR
caliper
bod-

ies
.

9)
Remove
air
bleeder
screws
from
the
RL
andRR
caliper

bodies
.

10)
Connect
the
air
bleeder
screws
to
the
FL
and
FR
cal-

iper
bodies
.

11)
Connect
two
pressure
gauges
to
the
RL
and
RR
cal-
iper
bodies
.

12)
Bleed
air
from
the
pressure
gauges
and
the
FL
and

FR
caliper
bodies
.

13)
Perform
ABS
sequence
control
.

<
Ref
.
to
[W25D0]
.*10
>

14)
When
thehydraulic
unit
begins
to
work,
at
first
the
RR

side
performs
decompression,
holding,
and
compression,

and
then
the
RL
side
performs
decompression,
holding,

and
compression
.

15)
Read
values
indicated
on
the
pressure
gauges
and

check
if
they
meet
thestandardvalue
.

16)
After
checking,
remove
the
pressure
gauges
from
cal-

iper
bodies
.

17)
Connect
the
air
bleeder
screws
to
RL
and
RR
caliper

bodies
.

18)
Bleed
air
from
brake
line
.

9

SERVICE
PROCEDURE
Iwz7oo1
4-4

25
.
ABS
Control
Module
and
Hydraulic
Control
Unit
(ABSCM&H/U)
[ABS
5
.3i
Type]
-
27
.
G
Sensor
(ABS
5
.3i
Type)

E
:
INSTALLATION

1)
Install
ABSCM&H/U
.

CAUTION
:

Confirm
that
the
specifications
of
the
ABSCM&H/U
con-

forms
to
the
vehicle
specifications
.

Tightening
torque
:

18
f
5
N~m
(1
.8
±
0
.5
kg-m,
13
.0
±
3
.6ft-Ib)
2)
Connect
brake
pipes
to
their
correct
ABSCM&H/U
con-

nections
.
<
Ref
.
to
[W18A4]
.*10
>

3)
Using
cable
clip,
secure
ABSCM&H/U
harness
to

bracket
.

4)
Connect
connector
to
ABSCM&H/U
.

CAUTION
:

9
Be
sure
to
remove
all
foreign
matter
from
inside
the

connector
before
connecting
.

9
Ensure
that
the
ABSCM&H/U
connetor
is
securely

locked
.

5)
Install
air
intake
duct
.

6)
Connect
ground
cable
to
battery
.

7)
Bleed
air
from
the
brake
system
.

26
.
ABS
Sensor
(ABS
5
.3i
Type)

<
Ref
.
to
4-4
[W1400]
.*1
>

27
.
G
Sensor
(ABS
5
.3i
Type)

Ref
.
to
4-4
[W2400]
.*5
>

15

4-4d
[TSOi1
BRAKES
[ABS
5
.31
TYPE]

5
.
Control
Module
I/OSignal
5
.
Control
Module
I/O
Signal

1
.
I/O
SIGNAL
VOLTAGE

ABS
control
moduleand
hydraulic
control
unit
connector

Ell

30000000

00000

Connector
switch

i

F49

1
21314
5
1
6
1
7
1
8
1
9
1
10
1
11
1
12
1
13
1
14
1
15

16
171819
20
2122
232425
26
1
27
1
28
1
29
1
30
1
31
1

84M1228A

NOTE
:

*
The
terminal
numbers
in
the
ABS
control
module
and

hydraulic
control
unit
connector
are
as
shown
in
the
fig-

ure
.

9
When
the
connector
is
removed
from
the
ABSCM&H/U,

the
connector
switchcloses
the
circuit
between
terminal

No
.
21
andNo
.
23
.
The
ABS
warning
light
illuminates
.

8

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

6
.
Diagnostics
Chart
for
On-board
Diagnosis
System

I
TROUBLE
OCCURS
.I

Is
Select
Monitor
available?
I
Yes
1
10
.
Diagnostic
Chart
with
Select
1
Monitor
.

Ask
the
customer
when
and
how
the
trouble
occurred
using
interview
check
list
.

6
.
Diagnostics
Chart
for
On-board

Diagnosis
System

A
:
BASIC
DIAGNOSTICS
PROCEDURE

I
PRE-INSPECTION
I

I
CALLING
UPA
TROUBLE
CODE
.
I

No
trouble
code
is
readable
.
Inspection
using
Diagnostic
Chart
for
Warning
Light
Failure
.

Record
all
trouble
codes
.
Only
the
start
code
is
issued
.

Trouble
codes
are
issued
.

Perform
diagnostics
in
accordance
with
trouble
code
.

Trouble
code
I
Repair
.
designated
.

Clear
memory
.

I
INSPECTION
MODE
I

I
CALLING
UPA
TROUBLE
CODE
.

Only
the
star
t
code
is
issued
.

CONFIRMATION
TEST

END

Inspection
using
General
Diagnostics
chart
.

B4M
1051
A

CAUTION
:

Remove
foreign
matter
(dust,
water,
etc
.)
from
the

ABSCM&H/U
connector
during
removal
and
installation
.

NOTE
:

e
To
check
harness
for
broken
wires
or
short
circuits,

shake
it
while
holding
it
or
the
connector
.

*
When
ABS
warning
light
illuminates,
read
and
record

trouble
code
indicated
by
ABS
warning
light
.

11

BRAKES
[ABS
5
.31
TYPE]
[T7A3]
4-4d

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

B1
2345
678910
1112
1
13
1
14
1
15
1
16
1
17
1
18
1
19
.
)

D

V

-
B4M1273A

I7A1
ICHONECK
IF
OTHER
WARNING
LIGHTS
TURN

Turn
ignition
switch
to
ON
(engine
OFF)
.

CHECK
:
Do
other
warning
lights
turn
on?

,rES
:
Go
to
step
7A2
.

No
:
Repair
combination
meter
.

7A2
I
CHECK
ABS
WARNING
LIGHT
BULB
.

1)
Turn
ignition
switch
to
OFF
.

2)
Remove
combination
meter
.

3)
Remove
ABS
warning
light
bulb
from
combination

meter
.

CHECK
:
Is
ABS
warning
light
bulb
OK?

,mss
:
Go
to
step
7A3
.

No
:
Replace
ABS
warning
light
bulb
.

7A3
CHECK
BATTERY

NG
LIGHT
HARNESS

SHO
RT
OF
ABS
WARN-

1)
Disconnect
connector
(B100)
from
connector
(F2)
.

2)
Measure
voltage
between
connector
(B100)
and
chas-

sis
ground
.

Connector
&
terminal
(B100)
No
.
9
(+)
-
Chassis
ground
(
)
:

CHECK
:
Is
thevoltage
less
than
3
V?

vES
:
Go
to
step
7A4
.

No
:
Repair
warning
light
harness
.

19

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