Page 185 of 3342
4-4d
[r1oaDo1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
D
"
NEW
52
(FBI)
M
.
RELAY
ON
B4M0970
AD
:
TROUBLE
CODE
52
M
.
RELAY
ON
-
MOTOR
RELAY
ON
FAILURE
-
DIAGNOSIS
:
Faulty
motor
Faulty
motor
relay
Faulty
harness
connector
TROUBLE
SYMPTOM
:
*
ABS
does
notoperate
.
WIRING
DIAGRAM
:
ABS
control
module
and
hydraulic
control
unit
SBF-6
Valve
relayO
F49
-LL
O
FuseIGN
sw
SBF-4
F1-1
.2513
LL
Motor
No
.
18
relay
`-
w
Qm
Solenoid
valve
FL
inlet
FLoutlet
FR
inlet
FR
outlet
RL
inlet
RL
outlet
RR
inlet
RR
outlet
Pump
motor
M
E
F49
100
1
121
3
1
4
1
5
1
6
1
7
1
8
1
9
1
1
0111
1
1
21
1
3114
1
5
4
161718191021
X
1
11
11
211311
4
1111
~~
d?
7
1
78
17
9
1
30
1
31
1
~56
84M
1255
176
Page 186 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
IT10AD5]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
ABSCM&H/U
D
II
f"
---
oo~
i
B4M1270A
10AD1
CHECK
MOTOR
RELAY
IN
ABSCM&H/U
.
Measure
resistance
between
ABSCM&H/U SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
IT10AD5]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
ABSCM&H/U
D
II
f"
---
oo~
i
B4M1270A
10AD1
CHECK
MOTOR
RELAY
IN
ABSCM&H/U
.
Measure
resistance
between
ABSCM&H/U](/manual-img/17/57434/w960_57434-185.png)
BRAKES
[ABS
5
.31
TYPE]
IT10AD5]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
ABSCM&H/U
D
II
f"
---
oo~
i
B4M1270A
10AD1
CHECK
MOTOR
RELAY
IN
ABSCM&H/U
.
Measure
resistance
between
ABSCM&H/U
terminals
.
Terminals
No
.
25
-
No
.
26
:
CHECK
.
:
Is
the
resistance
more
than
1
MSZ?
.
Go
to
step
10AD2
.
No
:
Replace
ABSCM&H/U
.
10AD2
CHECK
MOTOR
OPERATION
.
Operate
the
sequence
control
.
<
Ref
.
to
4-4
[W25D1
]
.
>
CHECK
;
Can
motor
revolution
noise
(buzz)
be
heard
when
carrying
out
the
sequence
control?
Go
to
step
10AD3
.
No
:
Replace
ABSCM&H/U
.
1
10AD3
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.I
Turn
ignition
switch
to
OFF
.
CHECK
:
Is
there
poor
contact
in
connector
between
hydraulic
unit,
relay
box
and
ABSCM&HlU?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>
,rss
:
Repair
connector
.
No
:
Go
to
step
10AD4
.
1
10AD4
I
CHECK
ABSCM&H/U
.
1)
Connect
all
connectors
.
2)
Erase
the
memory
.
3)
Perform
inspection
mode
.
4)
Read
outthe
trouble
code
.
diagnosis
stiff
being
output?
YES
:
Replace
ABSCM&H/U
.
No
:
Go
to
step
10AD5
.
CHECK
:
is
the
same
trouble
code
as
in
the
current
10AD5
CHECK
ANY
OTHER
TROUBLE
CODES
1APPEARANCE
.
I
Eck
&
-)
:
Are
other
trouble
codes
being
output?
Proceed
with
thediagnosis
corresponding
to
the
trouble
code
.
No
:
A
temporary
poor
contact
.
177
Page 187 of 3342
4-4d
[T1oaEO1
BRAKES
[ABS
5
.3i
TYPE]
10
.
DiagnosticsChart
withSelect
Monitor
D
"
NEW
52
(FBI)
MOTOR
B4M0971
AE
:
TROUBLE
CODE
52
MOTOR
-
ABNORMAL
MOTOR
-
DIAGNOSIS
:
Faulty
motor
Faulty
motor
relay
Faulty
harness
connector
TROUBLE
SYMPTOM
:
o
ABS
does
not
operate
.
WIRING
DIAGRAM
:
ABS
control
module
and
hydraulic
control
unit
SBF-6
Valve
relay
K
fl
:
F49
FZ
800
Fuse
IGN
sw
SBF-4
FL1
.25B
Motor
~
~N°'
relay
rw
am
Solenoid
valve
FL
inlet
FL
outlet
FR
inlet
FR
outlet
RL
inlet
RL
outlet
RR
inlet
RR
outlet
21
Pump
motor
M
E
E
F49
8100
1234567891011111415
4
16171819202122
~
11
121
I
4
11
'51
1
61
1
71
18
1
1
91201
~~
27282930
31
23
4
25
26
B4M1255
178
Page 188 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
(T10AE2]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
(~4~)
11
21
3141516171819
1101111121131141151
11161171181191202112
12812913W11
23
1
24
1
26
v
B4MI256A
r-A
112131 SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
(T10AE2]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
(~4~)
11
21
3141516171819
1101111121131141151
11161171181191202112
12812913W11
23
1
24
1
26
v
B4MI256A
r-A
112131](/manual-img/17/57434/w960_57434-187.png)
BRAKES
[ABS
5
.3i
TYPE]
(T10AE2]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
(~4~)
11
21
3141516171819
1101111121131141151
11161171181191202112
12812913W11
23
1
24
1
26
v
B4MI256A
r-A
1121314151617181911011111211311
51
1617
8192
21
23
2425
26
728293031
D
n
5C
B4M
1257A
10AE1
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
thevoltage
between
10
V
and
13
V?
,rES
:
Go
to
step
10AE2
.
No
:
Repair
harness/connector
between
battery
and
ABSCM&H/U
and
check
fuse
SBF6
.
10AE2
I
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
than0
.5
SZ?
,rES
:
Go
to
step
10AE3
.
No
:
Repair
ABSCM&H/U
ground
harness
.
179
Page 189 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
4-4d
[TyoAE3l
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
F49
D
P)
V
44-
84M1234A
I
F49
1
1
2
3
1
4
1
5
1
6
1
7
1
89
101112131415
1
16
1
17
1
18
1
19
1
2
01
21
12-
L-12
7
1 SUBARU LEGACY 1997 Service Repair Manual
4-4d
[TyoAE3l
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
F49
D
P)
V
44-
84M1234A
I
F49
1
1
2
3
1
4
1
5
1
6
1
7
1
89
101112131415
1
16
1
17
1
18
1
19
1
2
01
21
12-
L-12
7
1](/manual-img/17/57434/w960_57434-188.png)
4-4d
[TyoAE3l
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
F49
D
P)
V
44-
84M1234A
I
F49
1
1
2
3
1
4
1
5
1
6
1
7
1
89
101112131415
1
16
1
17
1
18
1
19
1
2
01
21
12-
L-12
7
12
8
1
2
00
31
1
2324
2526
1L
B4M
1243A
I10AE3]CHECK
INPUT
VOLTAGE
OF
ABSCM&HIU
.
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
thevoltage
between
10
V
and
15
V?
YES
:
Go
to
step
10AE4
.
No
:
Repair
harness
connector
between
battery,igni-
tion
switch
and
ABSCM&H/U
.
1
10AE4
I
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.
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
fl?
Go
to
step
10AE5
.
No
:
Repair
ABSCM&H/U
ground
harness
.
10AE5
CHECK
MOTOR
OPERATION
.
Operate
the
sequence
control
.
<
Ref
.
to
4-4
[W25D1
]
.
>
NOTE
:
Use
the
diagnosis
connector
to
operate
the
sequence
control
.
CHECK
:
Can
motor
revolution
noise
(buzz)
be
heard
when
carrying
outthe
sequence
control?
,rES
:
Go
to
step
10AE6
.
No
:
Replace
hydraulic
unit
.
180
Page 190 of 3342
BRAKES
[ABS
5
.31
TYPE]
[T10AE8]
4-4d
10
.
DiagnosticsChart
with
Select
Monitor
1
10AE6
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.
Turn
ignition
switch
to
OFF
.
CHECK
:
Is
there
poor
contact
in
connector
between
generator,
battery
and
ABSCM&HIU?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>
0
:
Repair
connector
.
No
:
Go
to
step
10AE7
.
1
10AE7
J
CHECK
ABSCM&HlU
.
1)
Connect
all
connectors
.
2)
Erase
the
memory
.
3)
Perform
inspection
mode
.
4)
Read
out
the
trouble
code
.
K
:
Is
the
same
trouble
code
as
in
thecurrent
diagnosis
still
being
output?
,rES
:
Replace
ABSCM&H/U
.
No
:
Go
to
step
10AE8
.
10AE8
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
.
181
Page 191 of 3342
4-4d
[r1oaFa1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
B4M0972
AF
:
TROUBLE
CODE
54
BLS
-
ABNORMAL
STOP
LIGHT
SWITCH
-
DIAGNOSIS
:
e
Faulty
stop
light
switch
TROUBLE
SYMPTOM
:
9
ABS
does
not
operate
.
WIRING
DIAGRAM
:
f49
F2
8100
ABS
control
module
and
hydraulic
control
unit
Fuse
SBF-3
FL1
.25B
No
.12
Stop
I
fight
switch
w
U
OV
tt
31311
(
E
B64
(Without
cruise
control)
865
(With
cruise
control)
B64
865
8100
F49
123456789101112131415
1
14
617
1
16
1
17
1
18
1
19
1
20
1
21
1
22
L
3
181
9
1
10
1
4
2526
1
2
4
1
1
11121131
14
1
1
51
161
11
1
81
1
91
20
1
q2
7
1281
29
13013
1
1
B4M1258
182
Page 192 of 3342
BRAKES
[ABS
5
.3i
TYPE]
[T10AF3J
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
BLS
(F09)
0
.
00
v
B4M0973
I
BLS
(F09)
12
.
00
V
84M1265
10AF1
HECKOUTPUT
OF
STOP
I
US
G
SELECT
MONITOR
.
LIGHT
SWITCH
1)
Press
[F],
[0]
and
[9]
on
the
select
monitor
.
2)
Depress
the
brake
pedal
3)
Read
the
stop
light
switch
output
on
the
select
moni-
tor
display
.
CFIECK
:
Is
the
reading
indicated
on
monitor
display
less
than
1
.5
V?
Go
to
step
10AF2
.
No
:
Go
to
step
10AF3
.
10AF2-
I
LIGHT
SWITCH
US
I
NG
SELECT
MONITOR
.
1)
Release
the
brakepedal
.
2)
Read
the
stop
light
switch
output
on
the
select
moni-
tor
display
.
CHECK
:
Is
the
reading
indicated
on
monitor
display
between
10
V
and
15
V?
0
:
Go
to
step
10AF5
.
No
:
Go
to
step
10AF3
.
1
10AF3
I
CHECK
IF
STOPLIGHTS
COME
ON
.
Depress
the
brake
pedal
.
CHECK
:
Do
stop
lights
turn
on?
Go
to
step
10AF4
.
No
:
Repair
stop
lightscircuit
.
183