1997 SUBARU LEGACY ABS

BRAKES
[ABS
5
.3i
TYPE]
[T10AI9]
4-4d

10
.
DiagnosticsChart
with
Select
Monitor

saMOS1s

Front
`
'--"~°°u-~
'

-'

0

B4M0917A

0

Front

Y-'
-
rm~mnm,-,
\

B4M0918A

110A17CHECK
G
SENSOR
.

1)
Remove
console
box
.

2)
Remove
G
sensor
from
vehicle
.

3)
Connect
connector
to
G
sensor
.

4)
Connect
connector
to
ABSCM&H/U
.

5)
Turn
ignition
switch
to
ON
.

6)
Measure
voltage
between
G
sensor
connector
termi-

nals
.

Connector&
terminal

(P11)
No
.
2
(+)
-
No
.
1(
)
:

CHECK
:
Is
thevoltage
between
2
.1
and
2
.5
V
when
G

sensor
is
horizontal?

,rES
:
Go
to
step
10A18
.

No
:
Replace
G
sensor
.

10A18
CHECK
G
SENSOR
.

Measure
voltage
between
G
sensor
connector
terminals
.

Connector
&
terminal
(R70)
No
.
2
(+)
-
No
.
1
(
)
:

CHECK
:
Is
thevoltage
between
3
.7
and
4
.1
V
when
G

sensor
is
inclined
forwards
to
90°?

Go
to
step
10A19
.

No
:
Replace
G
sensor
.

10A19
CHECK
G
SENSOR
.

Measure
voltage
between
G
sensor
connector
terminals
.

Connector
&
terminal
(R70)
No
.
2
(+)
-
No
.
1(
)
:

CHECK
;
Is
thevoltage
between
0
.5
and
0
.9
V
when
G

sensor
is
inclined
backwards
to
90°?

Go
to
step
10A110
.

No
:
Replace
G
sensor
.

201

4-4d
IT10AI10]
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
with
Select
Monitor

~10A110
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
code
as
in
thecurrent

diagnosis
still
being
output?

,mss
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10A111
.

10A111
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
poor
contact
.

202

4-4d
[TIoAJo]
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor

D
"
NEW
56
(FBI)

G
SENSOR
STICK

84M0813
I

AJ
:
TROUBLE
CODE
56
G
SENSOR
STICK

-
G
SENSOROUTPUT
IS
STUCK
-

DIAGNOSIS
:

*
Faulty
G
sensoroutput
voltage

TROUBLE
SYMPTOM
:

*
ABS
does
not
operate
.

WIRING
DIAGRAM
:

f19

ABS
control
module

R49R70

ABS
G
sensor

Shield
joint
connector

O
F48
R70

91101111121
W5J
II
ILl31

F49

H4M1111
I

204

BRAKES
[ABS
5
.3i
TYPE]
[T10AJ4]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

G-SENS
(F
10)

2
.30
v

B4M0927
I

Front

r

0

B4M0917A

0

Front

a
B4M0918A

I10AJ1
CHECK
(
TURN
NG

LL
FOUR
WHEELS
FOR
FREE

CHECK
:
Have
the
wheels
been
turned
freely
such
as

when
the
vehicle
is
lifted
up,
or
operatedon
a
rolling
road?

,rES
:
The
ABS
is
normal
.
Erase
the
trouble
code
.

No
:
Go
to
step
10AJ2
.

J2
CHECK
OUTPUT

I
SEL
CT
MONITORF

G
SENSOR
USING

1)
Press
[F],
[1]
and
[0]
on
the
select
monitor
.

2)
Read
the
select
monitor
display
.

CHECK
:
Is
theindicated
reading
between
2
.1
and
2
.5

Vwhen
the
vehicle
is
in
horizontalposition?

ves
:
Go
to
step
10AJ3
.

No
:
Go
to
step
10AJ8
.

I10AJ3
CHECK
OUTPUT

(SELECT
MONITORF

G
SENSOR
USING

1)
Turn
ignition
switchto
OFF
.

2)
Remove
console
box
.

3)
Remove
G
sensorfrom
vehicle
.
(Do
notdisconnect

connector
.)

4)
Turn
ignition
switch
to
ON
.

5)
Press
[F],
[1]
and
[0]
on
the
select
monitor
.

6)
Read
the
select
monitor
display
.

CHECK
;
Is
theindicated
reading
between
3
.7
and
4
.1

V
when
G
sensor
is
inclined
forwards
to
90°?

Go
to
step
10AJ4
.

No
:
Replace
G
sensor
.

I10AJ4
CHECK
OUTPUT

I
SELECT
MONITOR

F
G
SENSOR
USING

Read
the
select
monitor
display
.

CHECK
:
Is
theindicated
reading
between
0
.5
and
0
.9

Vwhen
G
sensor
is
inclined
backwards
to

90°?

vES
:
Go
to
step
10AJ5
.

No
:
Replace
G
sensor
.

205

4-4d
(TyoAJs1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
with
Select
Monitor

1

E

1
21314151617181911011111211311411
JIS671
191201211221
1
23
1
24
1
25
1
26
75129136131
.1
.

-

1

2
t-
94M1261A_

110AJ5
I
CHECKPOOR
CONTACT
IN
CONNECTORS
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
in
connector
between

ABSCM&HlU
and
G
sensor?
<
Ref
.
to
FORE-

WORD
[T3C1]
.*10
>

,mss
:
Repair
connector
.

No
:
Go
to
step
10AJ6
.

diagnosis
still
bung
output?

,mss
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10AJ7
.
(
10AJ6
I
CHECK
ABSCM&H/U
.

1)
Connect
all
connectors
.

2)
Erasethe
memory
.

3)
Perform
inspection
mode
.

4)
Read
out
the
trouble
code
.

CHECK
:
Is
the
same
trouble
code
as
in
the
current

10AJ7
CHECK
ANY

I
APPEARANCE

.THER
TROUBLE
CODES

CHECK
;
Are
other
trouble
codes
being
output?

vES
:
Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

10AJ8
I
pUT
HAR
NESS
AND
GROUND
HARNE
SS
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Measure
resistance
between
ABSCM&H/U
connector

terminals
.

Connector
&
terminal

(F49)
No
.
30
-
No
.
28
:

CHECK
:
Is
theresistance
between
4
.3
and
4
.9
kS2?

Go
to
step
f0AJ9
.

No
:
Repair
harness/connector
between
G
sensor
and

ABSCM&H/U
.

206

BRAKES
[ABS
5
.31
TYPE]
[T10AJ11]
4-4d

10
.
Diagnostics
Chart
withSelect
Monitor

B4M0915

Front
\

0

84M0917A

0

Front

r
--

B4M0918A

1
10AJ9
I
CHECKG
SENSOR
.

1)
Remove
console
box
.

2)
Remove
G
sensorfrom
vehicle
.

3)
Connect
connector
to
G
sensor
.

4)
Connect
connector
to
ABSCM&H/U
.

5)
Turn
ignition
switch
to
ON
.

6)
Measure
voltage
between
G
sensor
connector
termi-

nals
.

Connector
&
terminal
(P11)
No
.
2
(+)
-
No
.
1
(-)
:

CHECK
;
Is
thevoltage
between
2
.1
and
2
.5
V
when
G

sensor
is
horizontal?

vES
:
Go
to
step
10AJ10
.

No
:
Replace
G
sensor
.
I
10AJ10
1
CHECK
G
SENSOR
.

Measure
voltage
between
G
sensor
connector
terminals
.

Connector
&
terminal
(P11)
No
.
2
(+)
-
No
.
1
(-)
:

CHECK
;
Is
thevoltage
between
3
.7
and
4
.1
V
when
G

sensor
is
inclined
forwards
to
90°?

Go
to
step
10AJ11
.

No
:
Replace
G
sensor
.

I10AJ77
(CHECK
G
SENSOR
.

Measure
voltage
between
G
sensor
connector
terminals
.

Connector
&
terminal
(P11)
No
.
2
(+)
-
No
.
1
(
)
:

CHECK
:
Is
thevoltage
between
0
.5
and
0
.9
V
when
G

sensor
is
inclined
backwards
to
90°?

,rES
:
Go
to
step
10AJ12
.

No
:
Replace
G
sensor
.

207

4-4d
[T1oAJ12]
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

[
-k-
VO
J12
I
CHECK
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
all
connectors
.

3)
Erasethe
memory
.

4)
Perform
inspection
mode
.

5)
Read
out
the
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
10AJ13
.

10AJ13
CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
;
J
Are
other
trouble
codes
being
output?

,rES
:
Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

208

BRAKES
[ABS
5
.31
TYPE]
[T11A0]
4-4d

11
.
General
Diagnostics
Table

11
.
General
Diagnostics
Table

A
:
SYMPTOMSAND
PROBABLE
CAUSES

Symptom
Probable
faulty
units/parts

9
ABSCM&H/U
(solenoid
valve)
e
ABS
sensor
e
Brake
(caliper
&
piston,
pads)
Vehicle
pulls
to
either
side
.
*
Wheel
alignment
e
Tire
specifications,
tire
wear
and
air
pressures
9
Incorrect
wiringorpiping
connections
Vehicle
instability
during
braking
9Road
surface(uneven,
camber)

e
ABSCM&H/U
(solenoid
valve)
e
ABS
sensor
Vehicle
spins
.
*
Brake
(pads)
9
Tire
specifications,
tire
wear
and
air
pressures
9
Incorrect
wiring
orpiping
connections

9
ABSCM&H/U
(solenoid
valve)
Brake
(pads)
Long
braking/stopping
distance
*
Air
in
brake
line
9Tire
specifications,
tire
wear
and
air
pressures
a
Incorrect
wiringor
piping
connections

9
ABSCM&H/U
(solenoid
valve,
motor)
Wheel
locks
.
*
ABS
sensor
*
Incorrect
wiringorpiping
connections

9
ABSCM&H/U
(solenoidvalve)9
ABS
sensor
Master
cylinder
Brake
dragging
*
Brake
(caliper
8
piston)
Parking
brake
Poor
braking
*
Axle
&
wheels
Brake
pedal
play

Long
brake
pedal
stroke
9
Air
in
brake
line
Brake
pedal
play

*
Suspension
play
or
fatigue
(reduced
damping)
Vehicle
pitching
*
Incorrect
wiring
or
piping
connections
Road
surface
(uneven)

9
ABSCM&H/U
(solenoid
valve)
9
ABS
sensor

Unstable
or
uneven
braking
~
Brake
(caliper
&
piston,
pads)
~Tire
specifications,
tire
wear
and
air
pressures
e
Incorrect
wiring
orpiping
connections
*
Road
surface
(uneven)

Excessive
pedal
vibration
*
Incorrect
wiring
or
piping
connections
Road
surface
(uneven)

*
ABSCM&H/U
(mount
bushing)
Noise
from
ABSCM&H/U
*
ABS
sensor
Brake
piping

a
RBSCM&
H/U
(mount
bushing)
e
ABS
sensor

Vibration
and/or
noise
(while
*
Master
cylinder

driving
on
slippery
roads)
Noise
from
front
of
vehiclee
Brake
(caliper
&
piston,
pads,
rotor)
Brake
piping
e
Brake
booster
&
check
valve
*
Suspension
playor
fatigue

e
ABS
sensor
a
Brake
(caliper
&
piston,
pads,
rotor)
Noise
from
rear
of
vehicle
9
Parking
brake
Brake
piping
e
Suspension
playor
fatigue

209