steering SUBARU LEGACY 1997 Service Repair Manual

4-4
LM13-1]
BRAKES
13
.
Anti-lock
Brake
System
(ABS)
[5
.3i
Type]

13
.
Anti-lock
Brake
System
(ABS)
[5
.3i
Type]

1
.
FEATURE

*
This
ABS
5
.3i
type
incorporates
the
hydraulic
control
unit,
ABS
control
module,
valve
relay
and

motor
relay
in
one
unit
for
betterproductivity
and
lightweight
.

*
The
ABS
(Anti-lock
brake
system)
electrically
controls
brake
fluid
pressure
to
prevent
wheel

"lock"
during
braking
on
slippery
road
surfaces,
thereby
improving
directional/steering
stability
as

well
as
shortening
the
braking
distance
.

*
If
the
ABS
becomes
inoperative,
the
fail-safe
system
activates
to
ensure
it
acts
asa
conventional

brake
system
.
The
warning
light
also
comes
on
to
indicate
that
the
ABS
is
malfunctioning
.

"
The
front-and-rear
wheels
utilize
a
4-sensor,
4-channel
control
design
:
the
front
wheels
havean

independent
control
design*1
and
the
rear
wheels
have
a
select
low
control
design*2
.

*1
:
A
system
which
independently
controls
fluid
pressure
to
left
and
right
front
wheels
.

*2
:
A
system
which
provides
the
same
fluid
pressure
control
for
the
two
rear
wheels
if
either
wheel

starts
to"lock
."

10
ABS
control
moduleand
hydraulic
control
unit
(ABSCM&H/U)
Proportioning
valve
OO
Diagnosisconnector
OO
ABS
warning
light

OO
Data
link
connector
(for
SUBARU
select
monitor)
OO
Transmission
control
module
(only
AT
vehicle)
Tone
wheel

OO
ABS
sensor
09
Wheel
cylinder
O
G
sensor
(only
AWD
vehicle)
>>
Brake
switch
D
Master
cylinder

?15A

2

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

6
.
Diagnostics
Chart
for
On-board
Diagnosis
System

B
:
CHECK
LIST
FOR
INTERVIEW

Check
the
following
items
about
the
vehicle's
state
.

1
.
THE
STATE
OF
THE
ABS
WARNING
LIGHT

ABS
warning
light
O
Always

comes
on
.
D
Sometimes

O
Onlyonce

O
Does
not
come
on
o
When
/how
long
does
it
come
on?
:

Ignition
key
position
O
LOCK

D
ACC

OON
(before
starting
engine)

D
START

O
On
afterstarting
(Engine
is
running)

O
On
after
starting
(Engine
is
stop)

Timing
O
Immediately
afterignition
is
ON
.
O
Immediately
after
ignition
starts
.

O
When
advancing
km/h
to
km/h

MPH
to
MPH

D
While
traveling
at
a
constant
speed
km/h
MPH

D
When
decelerating
km/h
to
km/h

MPH
to
MPH
OWhen
turning
to
right
Steering
angle
:
deg

Steering
time
:
sec

D
When
turning
to
left
Steering
angle
:
deg

Steering
time
:
sec

D
When
moving
other
electrical
parts
Parts
name
Operating
condition

2
.
SYMPTOMS

ABS
operating
D
Performsno
work
.

condition
D
Operates
only
when
abruptly
applying
brakes
.
Vehicle
speed
:
km/h

MPH

~
How
to
step
on
brake
pedal

a)
Operating
time
:
sec

b)
Operating
noise
:
O
Produce
/
D
Does
not
produce

oWhat
kind
of
noise?
O
Knock

O
Gong
gong

D
Bong

a
Buzz

D
Gong
gong
buzz

O
Others

c)
Reaction
force
of
brake
pedal

O
Stick
O
Press
down
once
with
a
clunk

O
Press
and
released

D
Others

12

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

6
.
DiagnosticsChart
for
On-board
Diagnosis
System

Behavior
of
vehicle
a)
Directional
stability
cannotbe
obtained
or
steering
arm
refuses
to
work
when
applying
brakes

O
Yes
/
ONo

When
:
D
Vehicle
turns
to
right

o
Vehicle
turns
to
left

D
Spins

D
Others

b)
Directional
stability
cannot
be
obtained
orsteering
arm
refuses
to
work
when
accelerating

O
Yes
/
O
No

When
:
O
Vehicle
turns
to
right

O
Vehicle
turns
to
left

D
Spins

O
Others

c)
Brakes
areout
of
order
:
O
Yes
/
ONo

What
:
O
Braking
distance
is
long

O
Brakes
lockor
drag

D
Pedal
stroke
is
long

D
Pedal
sticks

O
Others

d)
Poor
acceleration
:
D
Yes
/
ONo

What
:
D
Fails
to
accelerate

o
Engine
stalls

o
Others

e)
Occurrence
of
vibration
:
D
Yes
/
[]No

Where
What
kind

f)
Occurrence
of
abnormal
noise
:
O
Yes
/
DNo

Where

What
kind

g)
Occurrence
of
other
phenomena
:
D
Yes
/
ONo

What
kind
3
.
CONDITIONS
UNDER
WHICH
TROUBLE
OCCURS

Environment
a)
Weather
D
Fine

O
Cloudy

O
Rainy

D
Snowy

O
Various/Others

b)
Ambient
temperature
F(°C)

c)
Road
D
Urban
area

D
Suburbs

O
Highway

O
General
road

D
Ascending
slope

O
Descending
slope

O
Paved
road

O
Gavel
road

O
Muddy
road

O
Sandy
place

Cl
Others

d)
Road
surface
D
Dry

D
Wet

O
New-fallen
snow

O
Compressed
snow

O
Frozen
slope

O
Others

13

BRAKES
[ABS
5
.31
TYPE]
[T8J5]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

811
CHECK

FREELY'FOR
ALONG
TIME
.

TURNED

Check
if
the
wheels
havebeen
turned
freely

for
more
than
one
minute,
such
as
when
the

vehicle
is
jacked-up,
under
full-lock
corner-
ing
or
when
fire
is
not
in
contact
with
road

surface
.

The
ABS
is
normal
.
Erase
the
trouble
code
.

NOTE
:

When
the
wheels
turn
freely
for
along
time,
such
as
when

the
vehicle
is
towed
or
jacked-up,
or
when
steering
wheel

is
continuouslyturned
all
the
way,
this
trouble
code
may

sometimes
occur
.

No
:
Go
to
step
8,12
.

18J2
I
CHECK
TIRE
SPECIFICATIONS
.

CHECK
:
Are
the
fire
specifications
correct?

,res
:
Go
tostep8
.113
.

No
:
Replace
tire
.

18,13
1
CHECK
WEAR
OF
TIRE
.

CHECK
:
Is
the
fire
worn
excessively?

,res
:
Replace
tire
.

No
:
Go
tostep
8,14
.

18J4
I
CHECK
TIRE
PRESSURE
.

CHECK
:
Is
the
fire
pressure
correct?

,rES
:
Go
to
step
8J5
.

No
:
Adjust
tire
pressure
.

18,15
1
CHECK
INSTALLATION
OF
ABS
SENSOR
.

Tighteningtorque
:

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

CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-

ened
securely?

,res
:
Go
to
step
8J6
.

No
:
Tighten
ABS
sensor
installation
bolts
securely
.

49

4-4d
[T1oHyl
BRAKES
[ABS
5
.3i
TYPE]

10
.
Diagnostics
Chart
with
Select
Monitor

FR
(F05)

30
km/h

B4M0922

I1
0H1
(CHECK
OUTPUT

SELECT
MONITORF

ABS
SENSOR
USING

Read
the
ABS
sensoroutput
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
30km/h
.

CHECK
:
Does
the
speed
indicated
on
the
display

change
in
response
to
the
speedometer

reading
during
acceleration/deceleration

when
the
steering
wheel
isin
the
straight-

ahead
position?

YES
:
Go
to
step
10H2
.

No
:
Go
to
step
10H9
.

1OH2
I
HECK
INSTALLATION
OF
ABS
SENSOR
.

Tighteningtorque
:

32
f
10
N~
m
(3.3
f
1
.0
kg-m,
24
±
7
ft-Ib)

CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-

ened
securely?

,rES
:
Go
to
step
10H3
.

No
:
Tighten
ABS
sensor
installation
bolts
securely
.

10H3
I
CHECK
INSTALLATION
OFTONE
WHEEL
.

Tightening
torque
:

13±3
N~m
(1
.3±0
.3
kg-m,
9±2
.2
ft-Ib)

CHECK
:
Are
the
tone
wheel
installation
bolts
tight-

ened
securely?

ves
:
Go
to
step
10H4
.

No
:
Tightentone
wheel
installation
bolts
securely
.

114

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]
[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

B2M1218
8) Loosen clamp which connects air intake chamber to
throttle body.
9) Disconnect air hoses, and remove air intake chamber.
G2M0280
10) Disconnect accelerator cable
1.
11) Disconnect cruise control cable

2. (With cruise control
model)
B2M1231A
12) Disconnect vacuum hoses from pressure sources
switching solenoid valve.
B2M0017
13) Remove power steering pump from bracket.
(1) Remove V-belt cover.
G2M0286
(2) Loosen lock bolt and slider bolt, and remove power
steering pump drive V-belt.
11
2-7SERVICE PROCEDURE
4. Intake Manifold

B2M0340
(3) Remove bolts which secure power steering pipe
brackets to intake manifold.
NOTE:
Do not disconnect power steering hose.
B2M0334
(4) Remove bolts which install power steering pump to
bracket.
B2M0029
(5) Place power steering pump on the right side wheel
apron.
B6M0772
14) Disconnect spark plug cords from ignition coil.
B2M1239
15) Disconnect PCV hose from intake manifold.
12
2-7SERVICE PROCEDURE
4. Intake Manifold

H2M1259A
12) Connect engine coolant hose
1to idle air control sole-
noid valve.
13) Connect air by-pass hose

2to idle air control solenoid
valve.
B2M1241
14) Connect engine coolant hose to throttle body.
B2M1239
15) Connect PCV hose to intake manifold.
B6M0772
16) Connect spark plug cords to ignition coil.
B2M0334
17) Install power steering pump on bracket.
(1) Install power steering pump on bracket, and tighten
bolts.
Tightening torque:
20.1±2.5 N⋅m (2.05±0.25 kg-m, 14.8±1.8 ft-lb)
20
2-7SERVICE PROCEDURE
4. Intake Manifold