Page 97 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T8W21
4-4d
S
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
(~~O)
q
1
2
3
4567
89
01112131415
1
16
1
17
1
18
1
19
1
2
01
21
1
23
242526
7
8293031
D
-V+
B4M
SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T8W21
4-4d
S
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
(~~O)
q
1
2
3
4567
89
01112131415
1
16
1
17
1
18
1
19
1
2
01
21
1
23
242526
7
8293031
D
-V+
B4M](/manual-img/17/57434/w960_57434-96.png)
BRAKES
[ABS
5
.3i
TYPE]
[T8W21
4-4d
S
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
(~~O)
q
1
2
3
4567
89
01112131415
1
16
1
17
1
18
1
19
1
2
01
21
1
23
242526
7
8293031
D
-V+
B4M
1256A
F49
1
L2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
01112131415
1617
1
18
1
19
1
2
01
21
12-
q
23
1
24
1
25
111
26
7
8293031
Dn
]t
B4M1257A
8W1
CHECK
INPUT
VOLTAGEOF
ABSCM&H/U
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
ABSCM&H/U
.
3)
Turn
ignition
switch
to
ON
.
4)
Measure
voltage
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
25
(+)
-
Chassis
ground
(
)
:
CHECK
:
Is
the
voltage
between
10
V
and
15
V?
,rES
:
Go
t0step
8W2
.
No
:
Repair
harness/connector
between
battery
and
ABSCM&H/U
and
check
fuse
SBF6
.
SW2
CHECK
GROUND
CIRCUIT
OF
MOTOR
.
1)
Turn
ignition
switch
to
OFF
.
2)
Measure
resistance
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
26
-
Chassis
ground
:
CHECK
:
Is
the
resistance
less
than
0
.5
92?
vES
:
Go
to
step
8W3
.
No
:
Repair
ABSCM&H/U
ground
harness
.
79
Page 98 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
4-4d
[T8W3]
BRAKES
[ABS
5
.3i
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
F49
D
P
V(4)
84M1234AI
F49
1
234,1567
89
1011112113
1
5
161
1
19
2
21
23
242526
728293031
f
1
SUBARU LEGACY 1997 Service Repair Manual
4-4d
[T8W3]
BRAKES
[ABS
5
.3i
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
F49
D
P
V(4)
84M1234AI
F49
1
234,1567
89
1011112113
1
5
161
1
19
2
21
23
242526
728293031
f
1](/manual-img/17/57434/w960_57434-97.png)
4-4d
[T8W3]
BRAKES
[ABS
5
.3i
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
F49
D
P
V(4)
84M1234AI
F49
1
234,1567
89
1011112113
1
5
161
1
19
2
21
23
242526
728293031
f
1
D~
SL
84M
7243A
8W3
CHECK
INPUT
VOLTAGEOF
ABSCM&H/U
.
1)
Run
the
engine
at
idle
.
2)
Measure
voltage
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
1
(+)
-
Chassis
ground
(
)
:
CHECK
:
is
the
voltage
between
10
V
and
15
V?
Go
tostep
8W4
.
No
:
Repair
harness
connector
between
battery,
igni-
tion
switch
and
ABSCM&H/U
.
8W4
I
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.
I
1)
Turn
ignition
switch
to
OFF
.
2)
Measure
resistance
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
23
-
Chassis
ground
:
CHECK
:
Is
the
resistance
less
than
0
.5
S2?
~ves~
:
Go
to
step
8WS
.
No
:
Repair
ABSCM&H/U
ground
harness
.
8W5
I
CHECK
MOTOR
OPERATION
.I
Operate
the
sequence
control
<
Ref
.
to
4-4
[W25D1
]
.
>
NOTE
:
Use
the
diagnosis
connector
to
operatethe
sequence
control
.
cHEC~c
:
Can
motor
revolution
noise
{buzz)
be
heard
when
carrying
out
the
sequence
control?
Go
tostep
8W6
.
No
:
Replace
ABSCM&H/U
.
80
Page 99 of 3342
BRAKES
[ABS
5
.31
TYPE]
[TSW$]
4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
CHECKPOOR
CONTACT
IN
CONNECTORS
.
Turn
ignition
switch
to
OFF
.
CHECK
:
Is
there
poor
contact
in
connector
between
generator,
battery
and
ABSCM&HI
U?
<
Ref
.
to
FOREWORD
[T3C1]
.*10>
vES
:
Repair
connector
.
No
:
Go
to
step
8W7
.
8W7
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
thecurrent
diagnosis
still
being
output?
,rES
:
Replace
ABSCM&H/U
.
No
:
Go
to
step
8W8
.
8W8
CHECK
ANY
IAPPE
RANCE
.
O
THER
TROUBLE
CODES
CHECK
:
Are
other
trouble
codes
being
output?
vES
:
Proceed
with
the
diagnosis
corresponding
to
the
trouble
code
.
No
:
A
temporarypoor
contact
.
81
Page 100 of 3342
4-4d
[Taxo1
BRAKES
[ABS
5
.3i
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
X
:
TROUBLE
CODE
54
-
ABNORMAL
STOP
LIGHT
SWITCH
-
DIAGNOSIS
:
Faulty
stop
light
switch
TROUBLE
SYMPTOM
:
e
ABS
does
notoperate
.
WIRING
DIAGRAM
:
Fuse
S8F-3
FL1
.258
No
.
12
F49
F2
8100
°
Stop
light
switch
172E
I
w
m
OV
LL
3~
E
ABS
control
B64
(Without
cruise
control)
module
and
865
(With
cruise
control)
hydraulic
control
unit
B64
865
8100
F49
123456789101112131415
M1
'
21
1
34
~
34
111
1
141
111
1920
16171819
20
2122
2324
25
26
27
1
28
1
29
1
3
013
11
B4M1258
82
Page 101 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T8X5]
4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
8X1
I
CHECK
STOP
LIGHTS
COME
ON
.
Depress
the
brake
pedal
.
CHECK
:
Do
stop
lights
come
on?
,rES
SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T8X5]
4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
8X1
I
CHECK
STOP
LIGHTS
COME
ON
.
Depress
the
brake
pedal
.
CHECK
:
Do
stop
lights
come
on?
,rES](/manual-img/17/57434/w960_57434-100.png)
BRAKES
[ABS
5
.31
TYPE]
[T8X5]
4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
8X1
I
CHECK
STOP
LIGHTS
COME
ON
.
Depress
the
brake
pedal
.
CHECK
:
Do
stop
lights
come
on?
,rES
:
Go
to
step
8X2
.
No
:
Repair
stop
lights
circuit
.
I
$X2
I
CHECK
OPEN
CIRCUIT
IN
HARNESS
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
ABSCM&H/U
.
3)
Depress
brake
pedal
4)
Measure
voltage
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
2
(+)
-
Chassis
ground
(-)
;
CHECK
:
Is
thevoltage
between
10
V
and
15
V?
YES
:
Go
to
step
8X3
.
No
:
Repair
harness
between
stop
light
switch
and
ABSCM&H/U
.
8X3
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.
CHECK
:
Is
there
poor
contact
in
connector
between
stop
light
switch
and
ABSCM&HlU?
<
Ref
.
to
FOREWORD
[T3C1]
.*70
>
,rES
:
Repair
connector
.
No
:
Go
to
step
8X4
.
18X4
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
thecurrent
diagnosis
still
being
output?
,rES
:
Replace
ABSCM&H/U
.
No
:
Go
to
step
8X5
.
8X5
CHECK
ANY
OTHER
TROUBLE
CODES
APPEARANCE
.
CHECK
:
Are
other
trouble
codes
being
output?
Proceed
with
the
diagnosis
corresponding
to
the
trouble
code
.
No
:
A
temporary
poor
contact
.
83
Page 102 of 3342
4-4d
[TSVO]
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
Y
:
TROUBLE
CODE
56
-
ABNORMAL
G
SENSOROUTPUT
VOLTAGE
-
DIAGNOSIS
:
e
Faulty
G
sensor
output
voltage
TROUBLE
SYMPTOM
:
e
ABS
does
notoperate
.
WIRING
DIAGRAM
:
F49
ABS
control
module
and
hydraulic
control
unit
Ft
P11
1
3
45678
P1
P11
ABS
G
sensor
IIIL131
F49
123456789101112131415
1
16
1
17
1
18
1
19
1
20
11
21
2
2324252627
1
28
1
29
1
30
1
31
1
84M1260
ii
64
Page 103 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
IT8Y3J4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
`G/
Tn]
1
Mark
~-ABSCM&HlU
g4M1248A
P11
2
1
D
+V-
B4M0911
B
8YI
CHECK
TURNING
LL
FOUR
WHEEL SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
IT8Y3J4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
`G/
Tn]
1
Mark
~-ABSCM&HlU
g4M1248A
P11
2
1
D
+V-
B4M0911
B
8YI
CHECK
TURNING
LL
FOUR
WHEEL](/manual-img/17/57434/w960_57434-102.png)
BRAKES
[ABS
5
.3i
TYPE]
IT8Y3J4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
`G/
Tn]
1
Mark
~-ABSCM&HlU
g4M1248A
P11
2
1
D
+V-
B4M0911
B
8YI
CHECK
TURNING
LL
FOUR
WHEELS
FOR
FREE
CHECK
:
Have
the
wheels
been
turned
freely
suchas
when
the
vehicle
is
lifted
up,
or
operatedon
a
rolling
road?
The
ABS
is
normal
.
Erase
the
trouble
code
.
Go
to
step
8Y2
.
CHECK
SPECIFICATIONS
OF
ABSCM&HIU
.
Check
specifications
of
the
mark
to
the
ABSCM&H/U
.
Mark
Model
C3
AWD
AT
C4
AWD
MT
1
'
he
an
dRSCM
fnr
dWn
MAIIPI
inciallprl
nna
FWD
model?
CAUTION
:
Be
sure
to
turn
ignition
switch
to
OFF
when
removing
ABSCM&H/U
.
,rES
:
Replace
ABSCM&H/U
.
No
:
Go
to
step
8Y3
.
18Y3
I
CHECK
INPUT
VOLTAGEOF
G
SENSOR
.
1)
Turn
ignition
switch
to
OFF
.
2)
Remove
console
box
.
3)
Disconnect
G
sensor
from
body
.
(Do
not
disconnect
connector
.)
4)
Turn
ignition
switch
to
ON
.
5)
Measure
voltage
between
G
sensor
connector
termi-
nals
.
Connector
&
terminal
(P11)
No
.
1
(+)
-
No
.
3
(
)
:
CHECK
:
Is
thevoltage
between
4
.75
and
5
.25
V?
Go
to
step
8Y4
.
No
:
Repair
harness/connector
between
G
sensor
and
ABSCM&H/U
.
85
Page 104 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
4-4d[T8Y4]
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Codeby
ABS
Warning
Light
1
1
2
34
5
67
819
h
011
111
211311411
l1
gi
18191201211221
23
1
24
1
25
1
26
1
7Ed2
30131
LS
B4M1261 SUBARU LEGACY 1997 Service Repair Manual
4-4d[T8Y4]
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Codeby
ABS
Warning
Light
1
1
2
34
5
67
819
h
011
111
211311411
l1
gi
18191201211221
23
1
24
1
25
1
26
1
7Ed2
30131
LS
B4M1261](/manual-img/17/57434/w960_57434-103.png)
4-4d[T8Y4]
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Codeby
ABS
Warning
Light
1
1
2
34
5
67
819
h
011
111
211311411
l1
gi
18191201211221
23
1
24
1
25
1
26
1
7Ed2
30131
LS
B4M1261A
F49
F49
8Y4
CHECKOPEN
IN
G
SENSOR
-
PUT
HARNESS
A
DuGROUND
HA
NESS
.T
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
the
resistance
between
4
.3
and
4
.9
kS2?
,rEg
:
Go
to
step
8Y5
.
No
:
Repair
harness/connector
between
G
sensor
and
ABSCM&H/U
.
8Y5
CHECK
GROUND
OUTPUT
HARN
SSHORT
IN
G
SENSOR
1)
Disconnect
connector
from
G
sensor
.
2)
Measure
resistance
between
ABSCM&H/U
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
6
-
Chassis
ground
:
CHECK
;
Is
the
resistance
more
than
1
M52?
S
:
Go
to
step
8Y6
.
connector
No
:
Repair
harness
between
G
sensor
ABSCM&H/U
.
and
8Y6
CHECK
BATTERY
SHORT
OF
HARNESS
.
Measure
voltage
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
6
(+)
-
Chassis
ground
(-)
:
CHECK
;
Is
the
voltage
less
than
1
V?
,rES
:
Go
to
step
8Y7
.
No
:
Repair
harness
between
G
sensor
and
ABSCM&H/U
.
86
-
84M1262A
I
B4M1263A
I