brake SUBARU LEGACY 1997 Service Service Manual

4-4d
[r7aa1
BRAKES
[ABS
5
.31
TYPE]

7
.
DiagnosticsChart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

2345
67890
B1~
1
11
1
12
1
13
1
14
1516
171819
1:
)

D

84M1273A

7A4
CHECK
BATTERY

NG
LIGHT
HARN

SSORT
OF
ABS
WARN-

1)
Turn
ignition
switch
to
ON
.

2)
Measure
voltage
between
connector
(B100)
and
chas-

sis
ground
.

Connector
&
terminal

(8100)
No
.
9
(+)
-
Chassis
ground
(
)
:

CHECK
:
is
voltage
less
than3
V?

YES
:
Go
to
step
7A5
.

No
:
Repair
warning
light
harness
.

7A5
CHECK
WIRING
HARNESS
.

1)
Turn
ignition
switch
to
OFF
.

2)
Install
ABS
warning
light
bulb
from
combination
meter
.

3)
Install
combination
meter
.

4)
Turn
ignition
switch
to
ON
.

5)
Measure
voltage
between
connector
(B100)
and
chas-

sis
ground
.

Connector
&
terminal

(B100)
No
.
9
(+)
-
Chassis
ground
(-)
:

CHECK
:
Is
voltage
between
10
V
and
15
V?

,rES
:
Go
to
step
7A6
.

No
:
Repair
wiring
harness
.

20

BRAKES
[ABS
5
.31
TYPE]
[r7Aal
4-4d

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

F49

1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
9h0
1
11
1
12
1
13
1
1
411
516
1
17
1
18
1
19
1
20
2
1
23
24
2526
728293031

D

-_
B4M
1243A

7A6
CHECK
BATTERY

NG
LIGHT
HARN

SSORT
OF
ABS
WARN-

1)
Turn
ignition
switch
to
OFF
.

2)
Measure
voltage
between
connector
(F2)
and
chassis

ground
.

Connector
&
terminal

(F2)
No
.
9
(+)
-
Chassis
ground
(
)
:

CHECK
:
Is
thevoltage
less
than3
V?

,rES
:
Go
to
step
7A7
.

No
:
Repair
wiring
harness
.

7A7

CHECK
BATTERY

(
NG
LIGHT
HARNESS
.

SHO
RT
OF
ABSWARN-

1)
Turn
ignition
switch
to
ON
.

2)
Measure
voltage
between
connector
(F2)
and
chassis

ground
.

Connector
&
terminal

(F2)
No
.
9
(+)
-
Chassis
ground
(
)
:

CHECK
:
Is
voltage
less
than3
V?

vES
:
Go
to
step
7A8
.

No
:
Repair
wiring
harness
.

7A8
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.

Measure
resistance
between
ABSCM&H/U
and
chassis

ground
.

Connector
&
terminal

(F49)
No
.
23
-
GND
:

CHECK
:
Is
theresistance
less
than0
.5
92?

,rES
:
Go
to
step
7A9
.

No
:
Repair
ABSCM&H/U
ground
harness
.

21

4-4d
[r7A9]
BRAKES
[ABS
5
.3i
TYPE]

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

7A9
CHECK
WIRING
HARNESS
.

Measure
resistance
between
connector
(F2)
and
chassis

ground
.

Connector
&
terminal

(F2)
No
.
9
-
Chassis
ground
:

CHECK
;
Is
the
resistance
less
than0
.5
11?

YES
:
Go
to
step
7A10
.

No
:
Repair
harness/connector
.

7A10
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.

Turn
ignition
switchto
OFF
.

CHECK
:
Is
there
poor
contact
in
connectors
between

combination
meter
and
ABSCM&HIU?
<
Ref
.

to
FOREWORD
[T3C1]
.*10
>

ves
:
Repair
connector
.

No
:
Replace
ABSCM&HIU
.

22

4-4d
[T7BO1
BRAKES
[ABS
5
.31
TYPE]

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

B
:
ABS
WARNING
LIGHT
DOES
NOT
GO
OFF
.

DIAGNOSIS
:

e
ABS
warning
light
circuit
is
open
or
shorted
.

TROUBLE
SYMPTOM
:

e
When
starting
the
engine
and
while
ABS
warning
light

is
kept
ON
.

WIRING
DIAGRAM
:

F49
F2
8100

ABS
control
module
and
hydraulic
control
unit
Fuse

No
.18

Fuse

C
:0
No
.
5

837
i2
ABS

Combination
meter

O
Diagnosis
°
E
connector
gg~

Diagnosis
terminal

IGNsw
SBF-4
FL1.25B

w

Q
m

Fuse
SBF-3

No
.
19

882
8100

1
11
1213141
161
11
10

i1

1
11213141
9
10
11134111181920212

0

1
10111
1

F49

12345678910111131415
16171819
20
2122
2324
25
2627
1
28
1
29
1
30
1
31
1

B4M1230

24

BRAKES
[ABS
5
.31
TYPE]
Cr7s3l
4-4d

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

Diagnosis
connector
--J

1

-1
Di
gnosis
terminals

B4MOBOOA

711311
CHECK

I
CONNECTOR
.

LLATION
OF
ABSCM&H/U

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
ABSCM&HlU
connector
inserted
into

ABSCM
until
the
clamp
locks
onto
it?

,res
:
Go
to
step
71132
.

No
:
Insert
ABSCM&H/U
connector
into
ABSCM&H/U

until
the
clamp
locks
onto
it
.

71132
CHECK
DIAGNOSIS
TERMINAL
.

Measure
resistance
between
diagnosis
terminals
(B81)

and
chassis
ground
.

CHECK
:
Terminals

Diagnosis
terminal
(A)
-
Chassis
ground
:

Diagnosis
terminal
(B)
-
Chassis
ground
:

Is
the
resistance
less
than
0
.5
92?

,rES
:
Go
to
step
71133
.

No
:
Repair
diagnosis
terminal
harness
.

171133
1
CHECK
DIAGNOSIS
LINE
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
diagnosis
terminal
to
diagnosis
connector

(B82)
No
.
6
.

3)
Disconnect
connector
from
ABSCM&H/U
.

4)
Measure
resistance
between
ABSCM&H/U
connector

and
chassis
ground
.

CHECK
:
Connector
&
terminal

(F49)
No
.
4
-
Chassis
ground
:

Is
theresistance
less
than
0
.5
0?

,rES
:
Go
tostep
71134
.

No
:
Repair
harness
connector
between
ABSCM&H/U

and
diagnosis
connector
.

25

4-4d
[T7BaI
BRAKES
[ABS
5
.3i
TYPE]

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

1~
\

MV

B4M0430

71134
CHECKGENERATOR
.

1)
Start
the
engine
.

2)
Idle
theengine
.

3)
Measure
voltage
between
generator
and
chassis

ground
.

Terminal

Generator
8
terminal
(+)
-
Chassis
ground
(
)
:

CHECK
;
Is
the
voltage
between
10
and
15
V?

vES
:
Go
to
step
7B5
.

No
:
Repair
generator
.

7B5
CHECK
BATTERY
TERMINAL
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
at
battery
terminal?

,rES
:
Repair
battery
terminal
.

No
:
Go
to
step
7B6
.

71136
CHECK
POWER
SUPPLY
OF
ABSCM
.

1)
Disconnect
connector
from
ABSCM&H/U
.

2)
Start
engine
.

3)
Idle
the
engine
.

4)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

(F49)
No
.
1
(+)
-
Chassis
ground
(-)
:

CHECK
:
Is
thevoltage
between
10
and
15
V?

ves
:
Go
to
step
71137
.

No
:
Repair
ABSCM&H/U
power
supply
circuit
.

71137
1
CHECK
WIRING
HARNESS
.

1)
Disconnect
connector
(F2)
from
connector
(B100)
.

2)
Turn
ignition
switch
to
ON
.

CHECK
:
Does
the
ABS
warning
light
remain
off?

S
:
Go
to
step
7B8
.

No
:
Repair
front
wiring
harness
.

26

BRAKES
[ABS
5
.31
TYPE]
[T7B121
4-4d

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

7B8
CHECK
PROJECTIONAT
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Check
for
broken
projection
at
the
ABSCM&H/U
termi

nal
.

CHECK
:
Are
the
projection
broken?

,res
:
Go
to
step
7139
.

No
:
Replace
ABSCM&H/U
.

-,
,

00000
~
o
00000
a
oooo1
~oo
oi
&#34;
ooo~~

IIII
`'84M1237A

0

F2

B4M1236A
I

F2

5
4
320
9
1
8
1
7
1
6
1
190
80
7
0
6
~
5
413211

]L

B4M1236A

171319
I
CHECK
ABSCM&H/U
.

Measure
resistance
between
ABSCM&H/U
terminals
.

Terminals

No
.
21
-
No
.
23
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

vES
:
Go
to
step
7810
.

No
:
Replace
ABSCM&H/U
.

7810
CHECK
WIRING
HARNESS
.

Measure
resistance
between
connector
(F2)
and
chassis

ground
.

Connector
&
terminal

(F2)
No
.
9
-
Chassis
ground
:

CHECK
:
Is
the
resistance
less
than0
.5
S2?

vES
:
Go
to
step
7811
.

No
:
Repair
harness
.

7811
CHECK
WIRING
HARNESS
.

1)
Connect
connector
to
ABSCM&H/U
.

2)
Measure
resistance
between
connector
(F2)
and
chas-

sis
ground
.

Connector
&
terminal

(F2)
No
.
9
-
Chassis
ground
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

YES
:
Go
to
step
7812
.

No
:
Repair
harness
.

POOR
CONTACT
IN
ABSCM&H/U
7812

1
CONNECTOR
.
CONNECTOR
.

CHECK
:
Is
there
poor
contact
in
ABSCM&HlU
connec-

tor?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>

,rES
:
Repair
connector
.

No
:
Replace
ABSCM&H/U
.

27

4-4d
[-nco]
BRAKES
[ABS
5
.31
TYPE]
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

C
:
TROUBLE
CODE
DOES
NOTAPPEAR
.

DIAGNOSIS
:

9
Diagnosis
circuit
is
open
.

TROUBLE
SYMPTOM
:

*
The
ABS
warning
light
turns
on
or
off
normally
butthe

start
code
cannot
be
read
out
in
the
diagnostic
mode
.

WIRING
DIAGRAM
:

F49
F2
B100

ABS
control
module
and
hydraulic
control
unit
Fuse

No
.
18
Fuse
v
w

c
:
i14
No
.
15

ABS

Combination
meter

oDiagnosis°E
connector

Diagnosis
terminal

B82
8100

11
11
1
1
21
1
31
14
1
1111
1910

i1
1
9
10
11
111
1
2

IGN
sw
SBF-4
FL1
.25B

rw

Q
m

Fuse

No
.19

SBF-3

0

1
4
10111
1

F49

123456789101112131415
16171819
20
2122
2324
25
26
27
1
28
1
29
1
30
1
31
1

84M1230
I

28

BRAKES
LABS
5
.31
TYNCJ
Lncs1
'4-ta

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

Diagnosisconnector
--J

1-

\~
--~

31

--L
Diagnosis
terminas

S2

B4MOSOOA

7C1
CHECK
DIAGNOSIS
TERMINAL
.

Measure
resistance
between
diagnosis
terminals
(B81)

and
chassis
ground
.

Terminals
Diagnosis
terminal
(A)
-
Chassis
ground
:

Diagnosis
terminal
(B)
-
Chassis
ground
.

E
CHECK
:
Is
the
resistance
less
than
0
.5
fl?

C~
;-E-~s
:
Go
to
step
7C2
.

No
:
Repair
diagnosis
terminal
harness
.

CHECK
DIAGNOSIS
LINE
.

1)
Turn
ignition
switchto
OFF
.

2)
Connect
diagnosis
terminal
to
diagnosis
connector

(B82)
No
.
6
.

3)
Disconnect
connector
from
ABSCM&H/U
.

4)
Measure
resistance
between
ABSCM&H/U
connector

and
chassis
ground
.

Connector
&
terminal

(F49)
No
.
4
-
Chassis
ground
:

CHECK
:
Is
the
resistance
less
than0
.5
S2?

,rES
:
Go
to
step
7C3
.

No
:
Repair
harness
connector
between
ABSCM&H/U

and
diagnosis
connector
.

POOR
CONTACT
IN
ABSCM&H/U
7C3

1
CONNECTOR
.
CONNECTOR
.

CHECK
:
Is
there
poor
contact
in
ABSCM&HI
U
connec-

tor?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>

vES
:
Repair
connector
.

No
:
Replace
ABSCM&H/U
.

29

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