Chassis SUBARU LEGACY 1997 Service User Guide

BRAKES
[ABS
5
.31
TYPE]
[r8E71
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

F49

B4M
1240A
'I

f
CHECK
BATTERY
SHORT
OF
HARNESS
.

Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
21
I
(F49)
No
.
11
(+)
-
Chassis
ground

Trouble
code
23
l
(F49)
No
.
9
(+)
-
Chassis
ground

Trouble
code
25
l
(F49)
No
.
14
(+)
-
Chassis
ground

Trouble
code
27
/
(F49)
No
.
7
(+)
-
Chassis
ground

(-)
:

CHECK
:
Is
thevoltageless
than
1
V?

ves
:
Go
to
step
8E6
.

No
:
Repair
harness
between
ABSCM&H/U
and
ABS

sensor
.

18E6
I
CHECK
BATTERY
SHORT
OFHARNESS
.

1)
Turn
ignition
switch
to
ON
.

2)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
21
/
(F49)
No
.
11
(+)
-
Chassis
ground

Trouble
code
23
l
(F49)
No
.
9
(+)
-
Chassis
ground

Trouble
code
25
l
(F49)
No
.
14
(+)
-
Chassis
ground

Trouble
code
27
/
(F49)
No
.
7
(+)
-
Chassis
ground

CHECK
:
Is
the
voltage
less
than
1
V?

ves
:
Go
to
step
8E7
.

No
:
Repair
harness
between
ABSCM&H/U
and
ABS

sensor
.

8E7
CHECK
INSTALLATION
OF
ABS
SENSOR
.

Tightening
torque
:

32
f
10
N~m
(3
.3
f
1
.0
kg-m,
24
f
7
ft-Ib)

CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-

ened
securel
y?

vES
:
Go
to
step
8E8
.

No
:
Tighten
ABS
sensor
installation
bolts
securely
.

35

BRAKES
[ABS
5
.3i
TYPE]
[T8E13]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

Except
OUTBACK
model

1
2

D
L
S2

B4M0818E

OUTBACK
model

Front
Rear

1
2
J
T~
2
1
L
2

B4M1042C

CHECK
GROUND
SHORT
OF
ABS
SENSOR
.

1)
Turn
ignition
switch
to
ON
.

2)
Measure
resistance
between
ABS
sensor
and
chassis

ground
.

Terminal

Front
RH
No
.
1
-
Chassis
ground
:

Front
LH
No
.
1
-
Chassis
ground
:

Rear
RH
No
.
1
-
Chassis
ground
:

Rear
LHNo
.
1
-
Chassis
ground
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

,rES
:
Go
to
step
8E12
.

No
:
Replace
ABS
sensor
and
ABSCM&H/U
.

CHECK
GROUND
SHORT
OFHARNESS
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
connector
to
ABS
sensor
.

3)
Measure
resistance
between
ABSCM&H/U
connector

terminal
and
chassis
ground
.

Connector
&
terminal

Trouble
code
21
I
(F49)
No
.
11
-
Chassis
ground
:

Trouble
code
23
l
(F49)
No
.
9
-
Chassis
ground
:

Trouble
code
25
I
(F49)
No
.
14
-
Chassis
ground
:

Trouble
code
27
/
(F49)
No
.
7
-
Chassis
ground
:

CHECK
;
Is
the
resistance
more
than
1
MS2?

,rES
:
Go
to
step
8E13
.

No
:
Repair
harness
between
ABSCM&H/U
and
ABS

sensor
.

Replace
ABSCM&H/U
.

(CHECK
POOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connectors
between

ABSCM&HIU
and
ABS
sensor?
<
Ref
.
to

FOREWORD
[T3C1]
.*10
>

vES
:
Repair
connector
.

No
:
Go
to
step
8E14
.

37

BRAKES
[ABS
5
.3i
TYPE]
[T8110]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

Except
OUTBACK
model

1
2

0

S2
B4MOSO6E

OUTBACK
model

Front
Rear

1
22
1

D

84M
1036C

Except
OUTBACK
model

1
2

L
j
134M0818E

OUTBACK
model

Front
Rear

1
2
2
1

D

L
-_
B4M1042C

818
1
CHECK
HUB
RUNOUT
.

Measure
hub
runout
.

CHECK
:
Is
the
runout
less
than
0
.05
mm
(0
.0020
in)?

vES
:
Go
to
step
819
.

No
:
Repair
hub
.

819
I
CHECK
RESISTANCE
OF
ABS
SENSOR
.

1)
Turn
ignition
switch
OFF
.

2)
Disconnect
connector
from
ABS
sensor
.

3)
Measure
resistance
between
ABS
sensor
connector
ter-

minals
.

Terminal

Front
RH
No
.
1
-
No
.
2

Front
LHNo
.
1
-
No
.
2
:

Rear
RH
No
.
1
-
No
.
2
:

Rear
LHNo
.
1
-
No
.
2

CHECK
:
Is
the
resistance
between
0
.8
and
1
.2
kS2?

Go
to
step
8110
.

No
:
Replace
ABS
sensor
.

18110
1
CHECK
GROUND
SHORT
OF°
ABS
SENSOR
.

Measure
resistance
between
ABS

ground
.

Terminal

Front
RH
No
.
1
-
Chassis
ground
:

Front
LHNo
.
1
-
Chassis
ground
.

Rear
RH
No
.
1
-
ChassisgrQUndr

Rear
LH=
No
.
1
-
Chassis
ground
:

se-near
and
chassis

oHEOK
:
Is
the
resistance
more
than
1
MO?

,rES
:
Go
to
step
8111
.

No
;:
Replace
ABS
sensor
.

43

4-4d
Crsiyyi
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

8111
CHECK
HARNESS/CONNECTOR
BETWEEN

ABSCM
AND
ABS
SENSOR
.

1)
Connect
connector
to
ABS
sensor
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Measure
resistance
at
ABSCM&H/U
connector
termi-

nals
.

Connector
&
terminal

Trouble
code
22
/
(F49)
No
.
11
-
No
.
12
:

Trouble
code
24
/
(F49)
No
.
9
-
No
.
10
:

Trouble
code
26
I
(F49)
No
.
14
-
No
.
15
:

Trouble
code
28
/
(F49)
No
.
7
-
No
.
8
:

CHECK
:
Is
the
resistance
between
0
.8
and
1
.2
kS2?

Go
to
step8112
.

No
:
Repair
harness/connector
between
ABSCM&H/U

and
ABS
sensor
.

F49

1
234
5
6
7
8
9101112131
15
1
16
1
1
~
1019
1
2
012
1
12
23
242526
728293031

S2
+84M1243A

CHECK
GROUND
SHORT
OF
HARNESS
.

Measure
resistance
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
22
I
(F49)
No
.
11
-
Chassis
ground
:

Trouble
code
24
/
(F49)
No
.
9
-
Chassis
ground
:

Trouble
code
26
/
(F49)
No
.
14
-
Chassis
ground
:

Trouble
code
28
I
(F49)
No
.
7
-
Chassis
ground
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

Go
to
step8113
.

No
:
Repair
harness/connector
between
ABSCM&H/U

and
ABS
sensor
.

813
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.

Measure
resistance
between
ABSCM&H/U
and
chassis

ground
.

Connector
&
terminal

(F49)
No
.
23
-
GND
:

i
:hIECK
:
Is
theresistance
less
than
0
.5
SZ?

Go
to
step
8114
.

No
:
Repair
ABSCM&H/U
ground
harness
.

44

BRAKES
[ABS
5
.31
TYPE]
IT8117i
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

814
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connectors
between

ABSCM&HlU
and
ABS
sensor?
<
Ref,
to

FOREWORD
[T3C1]
.*10
>

,rES
:
Repair
connector
.

No
:
Go
to
step8115
.

18115
1
CHECK
SOURCES
OF
SIGNAL
NOISE
.

CHECK
:
is
the
cartelephone
orthe
wireless
transmit-

ter
properly
installed?

Go
to
step
8116
.

No
:
Properly
install
the
car
telephone
or
the
wireless

transmitter
.

6
I
CHECK
SOURCES
OF
SIGNAL
NOISE
.

Are
noise
sources
(such
as
an
antenna)

installed
near
the
sensor
harness?

8100

1
1
-
1
2
01
19
1
1
81
17
11
6
11
!
98
7
65432
1111
11

D

fl
-0
Q
0

B4M1244A

vES
:
Install
the
noise
sources
apart
from
the
sensor

harness
.

No
:
Go
to
step
8117
.

8117
CHECK
SHIELD
CIRCUIT
.

1)
Connect
all
connectors
.

2)
Measure
resistance
between
shield
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
22
I
(8100)
No
.
11
-
Chassis
ground
:

Trouble
code
24
/
(8100)
No
.
2
-
Chassis
ground
:

Trouble
code
26
/
Go
to
step
8118
.

Trouble
code
28
/
Go
to
step
8118
.

CHECK
;
Is
the
resistance
less
than
0
.5
0?

Go
to
step
8118
.

No
:
Repair
shield
harness
.

45

BRAKES
[ABS
5
.31
TYPE]
IT8N3I4-4d

8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning
Light

819
11
Oil
111
21131141

4

161171181191212112
9
23
24
25
26
1
2
81
2
1301
31
1

F=_1

V
B4
M
1234A

F49

1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
101112131415
11
16
1
17
1
18
1
19
1
2
01
212
23
24
25
26
L-~
7
1
28
1
2001
11

]L
COO
B4M
1243A

$N1
I
CHECK
INPUT
VOLTAGE
OF
ABSCM&H/U
.

1)
Disconnect
connector
from
ABSCM&H/U
.

2)
Run
theengine
at
idle
.

3)
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?

,rES
:
Go
tostep
8N2
.

No
:
Repair
harness
connector
between
battery,
igni-

tion
switch
and
ABSCM&H/U
.

$N2
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
S2?

Go
to
step
8N3
.

No
:
Repair
ABSCM&H/U
ground
harness
.

$N3
I
CHECKPOOR
CONTACT
IN
CONNECTORS
.

Is
there
poor
contact
in
connectors
between

generator,
battery
and
ABSCM&HlU?
<
Ref
.

to
FOREWORD
[T3C1]
.*10
>

YES
:
Repair
connector
.

No
:
Go
to
step
8N4
.

55

BRAKES
[ABS
5
.31
TYPE]
[T8R3]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

F49

1
1
213
1
4
1
5
1
6
1
7
1
8
9
1
10
1
11
1
12
1
131
415
1
16
1
17
1
18
1
19
1
2
21
23
242526
728293031
1

D
~

]LB4M1243A

181111
1
CHECK
INPUT
VOLTAGEOF
ABSCM&H/U
.

1)
Disconnect
connector
from
ABSCM&H/U
.

2)
Run
the
engine
at
idle
.

3)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

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

CHECK
:
Is
thevoltage
between
10
V
and
15V?

,rES
:
Go
to
step
8112
.

No
:
Repair
harness
connector
between
battery,igni-
tion
switch
and
ABSCM&H/U
.

181112
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
than0
.5
S2?

Go
to
step
8R3
.

No
:
Repair
ABSCM&H/U
ground
harness
.

18113
1
CHECK
POOR
CONTACT
IN
CONNECTORS
.

Is
there
poor
contact
in
connectors
between

generator,
battery
and
ABSCM&HIU?
c
Ref
.

to
FOREWORD
[T3C1
]
.*10
>

,rES
:
Repair
connector
.

No
:
Go
to
step
8114
.

59

BRAKES
[ABS
5
.31
TYPE]
Rsss1
4-4d

8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning,Light

M

1
23
45
6
718
1101111121131141151
1116117118119121211
'9t,-73
24-
2526
71281203*
01311111

B4M1243A

8S1
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Measure
resistance
between
ABSCM&H/U
and
chassis

ground
.

Connector
&
terminal

(F49)
No
.
23
-
Chassis
ground
:

CHECK
;
Is
the
resistance
less
than
0
.5
0?
Go
to
step
8S2
.

No
:
Repair
ABSCM&H/U
ground
harness
.

8S2
CHECKPOOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connectors
between

battery,ignition
switch
and
ABSCM&HlU?

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

vES
:
Repair
connector
.

No
:
Go
tostep
8S3
.

8S3
CHECK
SOURCES
OF
SIGNAL
NOISE
.

CHECK
:
Is
thecar
telephone
orthe
wireless
transmit-

ter
properly
installed?

,rES
:
Go
to
step
8S4
.

No
:
Properly
install
thecar
telephone
or
the
wireless

transmitter
.

8S4
CHECK
SOURCES
OFSIGNAL
NOISE
.

CHECK
;
Are
noise
sources
(such
asan
antenna)

installed
near
the
sensorharness?

,rES
:
Install
the
noise
sources
apartfrom
the
sensor

harness
.

No
:
Go
to
step
8S5
.

8S5
I
CHECK
ABSCM&HIU
.

1)
Connect
all
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4)
Read
out
the
trouble
code
.

CHECK
:
Is
the
same
trouble
code
as
in
thecurrent

diagnosis
still
being
output?

Replace
ABSCM&H/U
.

No
:
Go
to
step
8S6
.

63

BRAKES
[ABS
5
.3i
TYPE]
[T8T3]
4-4Q

8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning
Light

\
7<
1

o

~
-
%mnn>>fl
5

B4M0430

F49

1
234
5
6
7
819
110111112113114115

4
1
18
22112
W23193123
1
24
1
25
1
26

L
F
a=--]

V

B4M1234A

18T1
I
CHECKGENERATOR
.

1)
Start
engine
.

2)
Idling
after
warm-up
.

3)
Measure
voltage
between
generator
B
terminal
and

chassis
ground
.

Terminal

Generator
B
terminal
-
Chassis
ground
:

CHECK
:
Is
thevoltage
between
10
V
and
17
V?

Go
to
step
8T2
.

No
:
Repair
generator
.

8T2
CHECK
BATTERY
TERMINAL
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Are
the
positive
and
negative
battery
termi-

nals
tightly
clamped?

ves
:
Go
to
step
8T3
.

No
:
Tighten
the
clamp
of
terminal
.

8T3
CHECK
INPUT
VOLTAGE
OF
ABSCM&H/U
.

1)
Disconnect
connectorfrom
ABSCM&H/U
.

2)
Run
the
engine
at
idle
.

3)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

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

CHECK
:
Is
thevoltage
between
10
V
and
17
V?

YES
:
Go
to
step
8T4
.

No
:
Repair
harness
connector
between
battery,
igni-

tion
switch
and
ABSCM&H/U
.

67

4-4d
[T8T4l
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

(~~O

a

1
23
4
567
819110111112113114115
16171819
2
1
23
2425
26
7
1281
2
91

]C
-_
84M1243A

$T4
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
0?

vES
:
Go
to
step
8T5
.

No
:
Repair
ABSCM&H/U
ground
harness
.

CHECKPOOR
CONTACT
IN
CONNECTORS
.I

Is
there
poor
contact
in
connectors
between

generator,
battery
and
ABSCM&HIU?
<
Ref
.

to
FOREWORD
[T3C1]
.*10
>

Repair
connector
.

No
:
Go
to
step
8T6
.

18T6
i
CHECK
ABSCM&HIU
.

1)
Connect
ail
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4)
Read
outthe
trouble
code
.

diagnosis
still
being
output?

,mss
:
Replace
ABSCM&H/U
.

No
:
Go
tostep
8T7
.

CHECK
;
Is
the
same
trouble
code
as
in
thecurrent

CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
:
Are
other
trouble
codes
being
output?

Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporarypoor
contact
.

68