1997 SUBARU LEGACY check engine

BRAKES
[ABS
5
.31
TYPE]
IT8V3]4-4d

8
.
Diagnostics
Chad
with
Trouble
Codeby
ABS
Warning
Light

F49

1
1
213141516
1
7
1
89
101112131415
161718192
21
23
242526
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SL
B4M1243A

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oo

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1

IIII
`
84M1272A

18V-,
CHECK
INPUT
VOLTAGE
OF
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Run
the
engine
at
idle
.

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

chassis
ground
.

Connector
&
terminal

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

(F49)
No
.
24
(+)
-
Chassis
ground
(
)
:

CHEGK
:
Is
the
voltage
between
10
V
and
15
V?

YES
:
Go
to
step
8V2
.

No
:
Repair
harness
connector
between
battery
and

ABSCM&H/U
.

8V2
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
leis
than0
.5
0?

Go
to
step
8V3
.

No
:
Repair
ABSCM&H/U
ground
harness
.

8V3
CHECK
VALVE
.
RELAY
IN
ABSCM&H/U
.

Measure
resistance
between
ABS,CM&H/U
and
terminals
.

Terminals

No
.
23
(+)
-
-
No
.
24
(-)

CHECK
:
Is
theresistance
amore
than
1'
MSZ?

YES
:
Go
to
step
8V4
.

No
:
Replace
ABSCM&H/U
.

75

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

BRAKES
[ABS
5
.3i
TYPE]
[T1
0C4]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

1~
\

v
ILIA

m(l
(l
n
!~
5r
J
%

B4M0430

1
10C1
I
CHECKGENERATOR
.I

1)
Start
the
engine
.

2)
Idle
the
engine
.

3)
Measure
voltage
between
generator
and
chassis

ground
.

Terminal

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

CHECK
;
Is
the
voltage
between
10
and
15
V?

Go
tostep
10C2
.

No
:
Repair
generator
.

10C2
CHECK
BATTERY
TERMINAL
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
at
battery
terminal?

,rES
:
Repair
battery
terminal
.

No
:
Go
to
step
10C3
.

10C3
CHECK
I
MONITOR
.

MMUNICATION
OF
SELECT

Using
the
select
monitor,
check
whether
communication

to
other
system(suchas
engine,
AT,
etc
.)
can
be
executed

normally
.

CHECK
:
Are
the
name
and
year
ofthe
system
dis-

played
on
theselect
monitor?

Go
to
step
10C4
.

No
:
Repair
select
monitor
communication
cable
and

connector
.

10C4
CHECK
I
CONNECTOR
.

INSTALLATION
OF
ABSCM&H/U

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
ABSCM&HIU
connector
inserted
into

ABSCM&HlU
until
the
clamp
locks
onto
it?

Go
to
step
10C5
.

n~o
:
Insert
ABSCM&H/U
connector
into
ABSCM&H/U

until
the
clamp
locks
onto
it
.

105

4-4d
[T1ocs1
BRAKES
[ABS
5
.3i
TYPE]

10
.
DiagnosticsChart
with
Select
Monitor

F49

1
2
3L415161718
9
1
10
1
11
1
12
1
13
1
14
1
15
6171819
221
232425
26
I
U
71
28121301311

D
~

SC
B4M
1243A

I
10C5
I
CHECK
POWER
SUPPLY
OF
ABSCM&H/U
.

1)
Disconnect
connectorfrom
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?

,rES
:
Go
to
step
10C6
.

No
:
Repair
ABSCM&H/U
power
supply
circuit
.
I
10C6
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
theresistance
less
than0
.5
0?

Repair
harness/connector
between
ABSCM&H/U

and
select
monitor
.

No
:
Go
to
step
10C7
.

106

4-4d
[T1oQil
BRAKES
[ABS
5
.31
TYPE]

10
.
DiagnosticsChart
with
Select
Monitor

1

112131415161718
0
11
121131141
5
116117118119120121
23
2425
26
7128129[301311
1

C
-_
B4M
1243A

1
1001
I
CHECK
INPUT
VOLTAGEOFABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connectorfrom
ABSCM&H/U
.

3)
Run
theengine
at
idle
.

4)
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?

,res
:
Go
to
step
1002
.

No
:
Repair
harness
connector
between
battery,
igni-

tion
switch
and
ABSCM&H/U
.

11002
1
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
1003
.

No
:
Repair
ABSCM&H/U
ground
harness
.

11003
1
CHECK
POOR
CONTACT
IN
CONNECTORS
.I

Is
there
poor
contact
in
connectors
between

generator,
battery
and
ABSCM&HlU?
<
Ref
.

to
FOREWORD
[T3CI]
.*10
>

Repair
connector
.

No
:
Go
to
step
10Q4
.

140

4-4d
IT10U1]
BRAKES
[ABS
5
.31
TYPE]

10
.
DiagnosticsChart
with
Select
Monitor
F49

1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
0111131415
16171819
2
2123
24
2526
1281
2
913013
1
1

D

-V+
B4M
1234A

F49

1
1
213
1
4
1
5
1
6
1
7
1
8
1
9
101112131
15
161
1819
2
01
21
12-
23
242526
728293031
1

FM
n

]L
84M1243A

10U1
CHECK
INPUT
VOLTAGE
OF
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Run
the
engine
at
idle
.

4)
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
to
step
10U2
.

No
:
Repair
harness
connector
between
battery,
igni-

tion
switch
and
ABSCM&H/U
.

10U2
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?

,res
:
Go
to
step
10U3
.

No
:
Repair
ABSCM&H/U
ground
harness
.
1
10U3
I
CHECKPOOR
CONTACT
IN
CONNECTORS
.

Is
there
poor
contact
in
connectors
between

generator,
battery
and
ABSCM&HlU?
<
Ref
.

to
FOREWORD
(T3C1]
.*10
>

,rES
:
Repair
connector
.

No
:
Go
to
step
10U4
.

144

BRAKES
[ABS
5
.31
TYPE]
[T10W4]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

-
%mnnnur

B4M0430

[1
_
Owl
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
15
V?

U
:
Go
tostep
10W2
.

No
:
Repair
generator
.

1OW2
CHECK
BATTERY
TERMINAL
.

Turn
ignition
switch
to
OFF
.

Are
the
positive
and
negative
battery
termi-

nals
tightly
clamped?

0
:
Go
to
step
10W3
.

No
:
Tighten
the
clamp
of
terminal
.

(CHECK
INPUT
VOLTAGE
OF
ABSCM&H/U
.

F49

1
1
2131415
1
6
1
7
1
89
1
10
1
11
1
12
1
13
1
14
11
5
1
16
71819
2
1
23242526
728293031
1

'L
L
a
84M1243A

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
15
V?

,rES
:
Go
to
step
10W4
.

No
:
Repair
harness
connector
between
battery,
igni-

tion
switch
and
ABSCM&H/U
.

10W4
CHECK
GROUND
CIRCUIT
OF
ABSCM&HIU
.

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
SZ?

,rES
:
Go
tostep
10111115
.

No
:
Repair
ABSCM&H/U
ground
harness
.

151

BRAKES
[ABS
5
.31
TYPE]
[T1
0X3]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

l

o

-
-
;mnnwr

B4M0430

F49

I,vC~j
84M
1234A
I

10X1
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
:

K
;
Is
the
voltage
between
10
V
and
17V?

~,rES~
:
Go
tostep
10X2
.

No
:
Repair
generator
.

10X2
I
CHECK
BATTERY
TERMINAL
.

Turn
ignition
switch
to
OFF
.

CHECK
;
Are
the
positive
and
negative
battery
termi-

nals
tightly
clamped?

Go
to,
step
10X3
.

No
:
Tighten
the
clamp
of
terminal
.

10X3
I
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
17V?

,rES
:
Go
to
step
10X4
.

No
:
Repair
harness
connector
between
battery,
igni-

tion
switch
and
ABSCM&H/U
.

155