1997 SUBARU LEGACY ignition

BRAKES
[ABS
5
.31
TYPE]
[T6D1]4-4d

6
.
Diagnostics
Chart
for
On-board
Diagnosis
System

Diagnosisconnector
--J

-\
o

o

Diagnosis
terminals
3
terminal
6
terminal
/

B4M0082D

C
:
INSPECTION
MODE

Reproduce
thecondition
underwhich
the
problem
has

occurred
as
much
as
possible
.

Drive
the
vehicle
at
a
speed
more
than40
km/h
(25
MPH)

forat
least
one
minute
.

D
:
TROUBLE
CODES

When
on-board
diagnosis
of
the
ABS
control
module

detects
a
problem,
the
information
(up
to
a
maximum
of

three)
will
be
stored
in
the
EEP
ROM
asa
trouble
code
.

When
there
are
more
than
three,
the
most
recent
three
will

be
stored
.
(Stored
codes
will
stay
in
memory
until
they
are

cleared
.)

1
.
CALLING
UP
A
TROUBLE
CODE

1)
Take
out
diagnosis
connector
from
side
ofdriver's
seat

heater
unit
.

2)
Turn
ignition
switch
OFF
.

3)
Connect
diagnosis
connector
terminal
6
to
diagnosis

terminal
.

4)
Turn
ignition
switch
ON
.

5)
ABS
warning
light
is
set
in
the
diagnostic
mode
and

blinks
toidentify
trouble
code
.

6)
After
the
start
code
(11)
is
shown,
the
trouble
codes
will

be
shown
in
order
of
the
last
information
first
.

These
repeat
for
a
maximum
of
5
minutes
.

NOTE
:

When
there
are
no
trouble
codes
in
memory,
only
the
start

code
(11)
is
shown
.

Example
of
code
indication

Trouble
code
:
21

ON
111
1
2
1
1
2

OFF
~'2
sec

1
.0s

ec
1
.2
sec
1.2
sec
1
.0
sec
U
~~
U
U
L
.-J

0
.3
sec
0
.3
sec
0
.3
sec

Start
code
Trouble
code
21
Start
code
Trouble
code
21

Trouble
code
:
22,
31

ON
1
1
22
3
1
11

OFF

Start
code
Trouble
code
22
Trouble
code
31Start
code
B4M0232A

15

4-4d
R7ao1
BRAKES
[ABS
5
.3i
TYPE]

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

7
.
Diagnostics
Chart
for
ABS
Warning

Light
Circuit
and
Diagnosis
Circuit

Failure

A
:
ABS
WARNING
LIGHT
DOES
NOT
COME

ON
.

DIAGNOSIS
:

e
ABS
warning
light
circuit
is
open
or
shorted
.

TROUBLE
SYMPTOM
:

e
When
ignition
switch
is
turned
ON
(engine
OFF),
ABS

warning
light
does
not
come
on
.

WIRING
DIAGRAM
:

Fuse

No
.
12

Fuse

F49
f2
B100

ABS
control
module
and
hydraulic
control
unit

c
:
i14
No
.15

L
ABS

Combination
meter

881
0
Diagnosis
°
E
connector

Diagnosis
terminal

IGNsw
SBF-4
FL1.25B

Fuse
SBF-3

No
.19

882
8100

01
11
12
11
1
1
ID
M
131415161

i2
1
4
10
11
1
13141
1

i14

1
11
11

f49

123456789101112131415
16171819
20
2122
23
24252627
1
28
1
29
1
30
13
11

rw
am

84M1230

18

BRAKES
[ABS
5
.31
TYPE]
[T7A3]
4-4d

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

B1
2345
678910
1112
1
13
1
14
1
15
1
16
1
17
1
18
1
19
.
)

D

V

-
B4M1273A

I7A1
ICHONECK
IF
OTHER
WARNING
LIGHTS
TURN

Turn
ignition
switch
to
ON
(engine
OFF)
.

CHECK
:
Do
other
warning
lights
turn
on?

,rES
:
Go
to
step
7A2
.

No
:
Repair
combination
meter
.

7A2
I
CHECK
ABS
WARNING
LIGHT
BULB
.

1)
Turn
ignition
switch
to
OFF
.

2)
Remove
combination
meter
.

3)
Remove
ABS
warning
light
bulb
from
combination

meter
.

CHECK
:
Is
ABS
warning
light
bulb
OK?

,mss
:
Go
to
step
7A3
.

No
:
Replace
ABS
warning
light
bulb
.

7A3
CHECK
BATTERY

NG
LIGHT
HARNESS

SHO
RT
OF
ABS
WARN-

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

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

sis
ground
.

Connector
&
terminal
(B100)
No
.
9
(+)
-
Chassis
ground
(
)
:

CHECK
:
Is
thevoltage
less
than
3
V?

vES
:
Go
to
step
7A4
.

No
:
Repair
warning
light
harness
.

19

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

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