1997 SUBARU LEGACY high voltage

4-4
[W25D4]
SERVICE
PROCEDURE

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

4
.
CONDITIONS
FORABS
SEQUENCE
CONTROL

4
km/h

Speed
of
all
wheels

HIGF
Terminal
No
.3
and
No
.6
LOV1
Operational
guide
lineofIgnition
key
switch
O
sequence
OFF

control
O
ABS
warning
light
OFF

HIGF
Stop
light
switch
LO"

HIGF
AT
ABS
signal
LOW

Valve
relay
ON

OFF

FL
outlet
valve
ON
OFF

FL
inlet
valve
O
NOFF

Operational
FR
outlet
valve
ON
OFF
pattern
of
ON
sequence
FR
inlet
valve
OFF
control
RR
outlet
valve
OFF
RR
inlet
valve
ON
OAF

RL
outlet
valve
OFF

RL
inlet
valve
ONOFF

Pump
motor
OFF

Operational
Pressure
of
master
cylinder

pressure
of
Pressure
of
FLwheel
cylinder
Pressure
of
FR
wheel
cylinder
sequence
Pressure
of
RR
wheel
cylinder
control
Pressure
of
RL
wheel
cylinder

Unit
:
second

B4M1001A
I

NOTE
:

*
When
select
monitor
is
used,
control
operation
starts
at

point
A
.
The
patterns
from
IGN
key
ON
to
the
point
A
show

that
operation
is
started
by
diagnosis
connector
.

HIGH
means
high
voltage
.

LOW
means
low
voltage
.

14

4-4a
[TBAO1
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

8
.
Diagnostics
Chart
with
Trouble
Code

by
ABS
Warning
Light

A
:
LIST
OF
TROUBLE
CODE

Trouble
code
Contents
of
diagnosis
Ref
.
to
11

Start
code

e
Trouble
code
is
shown
afterstart
code
.

*
Only
start
code
is
shown
in
normal
condition
.

-

21
Front
right
ABS
sensor
[T8B0]*10

23
Abnormal
ABS
sensor
Front
left
ABS
sensor
[T8C0]*10

25
(Open
circuit
or
input
voltage
too
high)
Rear
right
ABS
sensor
[T8D0]*10

27
Rear
left
ABS
sensor
[T8E0]x10

22
Front
right
ABS
sensor
[T8F0]*10

24
Front
left
ABS
sensor
[T8G0]dr10

26
Abnormal
ABS
sensor

(Abnormal
ABS
sensor
signal)
Rear
right
ABS
sensor
[T8H0]*10

28
Rear
left
ABS
sensor
[T810]*10

29
Any
one
of
four
[T8J0]*10

31Front
rightinlet
valve
[T8K0]*10

32
Front
right
outlet
valve
[7800]*10

33
Front
left
inlet
valve
[TSLO]*10

34
Abnormal
solenoid
valve
circuit(s)
in
Front
left
outlet
valve
[T8PO]*10

35
ABS
control
module
and
hydraulic
unit
Rear
right
inlet
valve
[T8M0]*10

36Rear
right
outlet
valve
[T8QOj*10

37
Rear
left
inlet
valve
[T8N0]x10

38Rear
left
outlet
valve
[T8R0]*10

41
Abnormal
ABS
control
module
[T8SO1*10

42
Source
voltage
is
abnormal
.
[7870]*10

44
A
combination
of
AT
control
abnormal
[T8U0]t`r10

51
Abnormal
valve
relay
[T8V0]*10

52
Abnormal
motor
and/or
motor
relay
[T8W0]*10

54
Abnormal
stop
light
switch
(78X0]*10

56
Abnormal
G
sensor
output
voltage
[T8Y0)*10

30

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

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

B
:
TROUBLE
CODE
21
(FRONT
RH)

C
:
TROUBLE
CODE
23
(FRONT
LH)

D
:
TROUBLE
CODE
25
(REAR
RH)

E
:
TROUBLE
CODE
27
(REAR
LH)

-
ABNORMAL
ABS
SENSOR
(OPEN
CIRCUIT

OR
INPUT
VOLTAGE
TOO
HIGH)
-

DIAGNOSIS
:

"
Faulty
ABS
sensor
(Broken
wire,
input
voltage
too
high)

Faulty
harness
connector

TROUBLE
SYMPTOM
:

*
ABS
does
notoperate
.

WIRING
DIAGRAM
:

F49

ABS
control
module
and
hydraulic
control
unit

OUTBACK
with
steproof
model
B~5
O
O
P8
OO
Ft
100

1
3
1
10
70969
4
78

Rear
ABS
sensor
LH

RearABS
sensor
RH

r----------------
I
OUTBACK
with
steproof
model
I
I
Q
I

RearABS-C~l
sensor
LH

I
I

RearABS
j
~--m
sensor
RH

I
Q
I
------------J

Front
ABS
sensorLH

Front
ABS
sensor
RH

f{9

1
345678911112131415
1116
1
17
1
18
1
19
1
2
0
2
122
4
26
7
1
28
1
29
130131
1

B4M1238

32

4-4d
[TSTO1
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

T
:
TROUBLE
CODE
42

-
SOURCE
VOLTAGE
IS
ABNORMAL
.
-

DIAGNOSIS
:

9
Power
source
voltage
of
the
ABSCM&H/U
is
low
or
high
.

TROUBLE
SYMPTOM
:

*
ABS
does
notoperate
.

WIRING
DIAGRAM
:

F49
SBF-4
FL1.25B

ABS
control
module
and
hydraulic
control
unit

F2
8100
IGN
sw
No

Fuse

8100
F49

12345678910111131415

1
1
2
1
3
1
4
151
16171819
20
2122
23
24
2526
1
11
1
12
1
13
1
14
11
51
16~
2128
2930
31

B4M1245

66

Generator

BRAKES
[ABS
5
.31
TYPE]
[T10B0]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

B
:
LIST
OF
TROUBLE
CODE

Code
Display
screen
(FBi)
Contents
of
diagnosis
Ref
.
to

-
ERROR
3
(1)
Select
monitor
communication
failure
[T10COJ*10

11
NO
TROUBLE
Although
no
trouble
appears
on
the
select
monitor
display,
the
ABS
warning
light
remains
on
.
[T10D0]*10

21
FR
.
SS
HARD
Open
circuit
orinput
voltage
too
high
of
FR
sensor
[T10E0]*10

22
FR
.
SS
SOFT
Abnormal
ABS
sensor
signal
of
FRsensor
[T1010J*10

23FL
.
SS
HARD
Open
circuit
orinput
voltage
too
high
of
FLsensor
[T10F0]*10

24FL
.
SS
SOFT
Abnormal
ABS
sensor
signal
of
FL
sensor
[T10J0]*10

25
RR
.
SS
HARD
Open
circuit
orinput
voltage
too
high
of
RR
sensor[T10G0]*10
26
RR
.
SS
SOFT
Abnormal
ABS
sensor
signal
of
RR
sensor[T10K0]*10
27
RL
.
SS
HARD
Open
circuit
orinput
voltage
too
high
of
RL
sensor
[T10H0]tr10

28
RL
.
SS
SOFT
Abnormal
ABS
sensor
signal
of
RL
sensor
[T10L0]*10

29
EITHER
.
SS
SOFT
Abnormal
ABS
sensor
signal
(any
one
of
four)
JT10M0]{r10

31
FR
.
EV
VALVE
Abnormal
FR
inlet
valve
[T10N0]*10

32
FR
.
AV
VALVE
Abnormal
FR
outlet
valve
[T10R0]*10

33
FL
.
EV
VALVE
Abnormal
FL
inlet
valve
[T1000]*10

34
FL
.
AV
VALVE
Abnormal
FL
outlet
valve
[T10S0]xr10

35
RR
.
EV
VALVE
Abnormal
RR
inlet
valve
[T10P0]*10

36
RR
.
AV
VALVE
Abnormal
RR
outlet
valve
[T10T0]*10

37
RL
.
EV
VALVE
Abnormal
RL
inlet
valve
[T10QO]*10

38
RL
.
AV
VALVE
Abnormal
RL
outlet
valve[T10U0]tr10

41
ECU
Abnormal
ABSCM&H/U
[T10V0)*10

42
LOW
VOLTAGE
Source
voltage
is
low
.
[T10W0]tr10

HIGH
VOLTAGE
Source
voltage
is
high
.
[T10X0]*10

44
CCM
LINE
A
combination
of
AT
control
abnormals
(ABS
not
in
control)
[T10Y0]*10

CCM
OPEN
A
combination
of
AT
control
abnormals
(ABS
in
control)
[T10Z0]*10

V
.
RELAY
Abnormal
valve
relay
[T10AA0]*10
51
V
.
RELAY
ON
Valve
relay
ON
failure
[T10AB0]*10

M
.
RELAY
OPEN
Open
circuit
of
motor
relay
[T10AC0]*10

52
M
.
RELAY
ON
Motor
relay
ON
failure
[T10AD0]tr10

MOTOR
Abnormal
motor
[T10AE0]*10

54
BLS
Abnormal
stop
light
switch
[T10AF0]*10

G
SENSOR
LINE
Open
or
short
circuit
of
G
sensor
[T10AG0]*10

G
SENSOR
+B
Battery
short
of
G
sensor
[T10AH0]*10
56
G
SENSOR
H
~x
Abnormal
G
sensor
high
V
output
[T10A10]*10

G
SENSOR
STICK
I
G
sensor
output
is
stuck
.
[T10AJ0]*10

NOTE
:

High
~t
means
high
friction
coefficient
against
road

surface
.

103

4-4d
[T10E0]
BRAKES
[ABS
5
.3i
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

D
"
NEW
21
(FBI)

F
R
.
SS
HARD

B4M0945

D
"
NEW
23
(FBI)

FL
.
SS
HARD

84M0946

D
"
NEW
25
(FBI)

RR
.
S
S
HARD

B4M0947

D
"
NEW
27
(FBI)

RL
.SS
HARD

84M0948

E
:
TROUBLE
CODE
21
FR
.
SS
HARD

-
ABNORMAL
FRONT
RH
ABS
SENSOR

(OPEN
CIRCUIT
OR
INPUT
VOLTAGE
TOO

HIGH)
-

F
:
TROUBLE
CODE
23
FL
.
SS
HARD

-
ABNORMAL
FRONT
LH
ABS
SENSOR

(OPEN
CIRCUIT
OR
INPUT
VOLTAGE
TOO

HIGH)
-

G
:
TROUBLE
CODE
25
RR
.
SS
HARD

-
ABNORMAL
REAR
RH
ABS
SENSOR
(OPEN

CIRCUIT
OR
INPUT
VOLTAGE
TOO
HIGH)
-

H
:
TROUBLE
CODE
27
RL
.
SS
HARD

-
ABNORMAL
REAR
LH
ABS
SENSOR
(OPEN

CIRCUIT
OR
INPUT
VOLTAGE
TOO
HIGH)
-

112

BRAKES
[ABS
5
.31
TYPE]
[T10H0]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

DIAGNOSIS
:

"
Faulty
ABS
sensor(Broken
wire,
input
voltage
too
high)

Faulty
harness
connector

TROUBLE
SYMPTOM
:

9
ABS
does
not
operate
.

WIRING
DIAGRAM
:

F49

ABS
control
module
and
hydraulic
control
unit

OUTBACK
with
step
roof
model
Bt5
O

O
P8
O
P8

[ft
LwI

O
8100

815

Front
ABS
sensorLH

Front
ABS
sensor
RH
Twisted
wire
Ft
Pt
OO

WEB
i
Twisted
wire

W
EB-

(2D

F1
100

F
172
-1
F3
1
F
U=
10
1
4
15161
7
1
8

Rear
ABS
sensor
LH

RearABS
sensor
RH

t
OUTBACK
with
step
roof
model
III

Rear
ABS
sensor
LH

j
~
RearABS
j
7
sensor
RH

I
~
I
L---------------J

F49

12345678910111131415
1
16
1
17
1
18
1
19
111
202122
23
4
252627
1
28
1
29
001
31

B4M1238

113

4-4d
[T1
0X01
BRAKES
[ABS
5
.3i
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

D
"
NEW
42
(FBI)

HIGH
VOLTAGE

B4M1268

X
:
TROUBLE
CODE
42
LOW
VOLTAGE

-
SOURCE
VOLTAGE
IS
HIGH
-

DIAGNOSIS
:

*
Power
source
voltage
of
the
ABSCM&H/U
is
high
.

TROUBLE
SYMPTOM
:

9
ABS
does
not
operate
.

WIRING
DIAGRAM
:

F49
f2
8100
Fuse
IGN
sw

No
.
18

SBF-4
FL1
.25B

8100
F49

1
23456
8910111
1415
4
1617181920212
11
11
21131141
1
51
1
61
1
11
1
81
1
9120
10
I
2ii2oi2y13"v13ii
232425
-26

B4M1245

154

Generator