ECU SUBARU LEGACY 1997 Service Repair Manual

8
.
Electrical
Wiring
Harness
and
Ground
Point

Connector
Connecting
to

No
.
Pole
Color
Area
No
.
Name

R17
1
Black
A-3
Rear
defogger
(Power)

R18
2
Black
B-3
Rear
speaker
RH

R19
2B-3
High-mounted
stop
light

R20
2
Blue
B-2
Trunk
room
light

R21
2
Black
B-2
Rear
speaker
LH

R22
1
Brown
B-1
Rear
door
switch
LH

R23
3
B-2
Power
antenna

R24
6B-3
R60
Trunk
lid
cord(Without
security
system)

8
B-3
R60
Trunk
lid
cord
(With
security
system)

R25
2
Black
B-4
Rear
defogger
condenser

R26
4
B-4
Rear
combination
light
RH

R27
2
B-4
Trunk
room
light
switch

R28
4
B-3
Rear
combination
light
LH

R45
6
B-4
Trailer
connector
(SUS
model)

R47
3B-3Fueltank
pressure
sensor

R60
6B-4
R24
Rear
wiring
harness
(Without
security
system)

8B-4
R24
Rear
wiring
harness
(With
security
system)

R61
3B-4
Key
switch
(Security)

R62
4B-4
Rear
finisher
light
RH

R63
2B-3
License
plate
light

R64
4B-3
Rear
finisher
light
LH

R65
1
Black
A-2
Rear
defogger(Ground)

R66
2
Black
B-4
E
High-mounted
stop
light
(Rear
spoiler)

'
:
Non-colored

3

A

B

C

D

8
.
REAR
END
WIRING
HARNESS
AND
GROUND
POINT
OF
SEDAN

1
1
2

1

3

R65

1
R17
,

R19

4

\
R66

GD
A
~
~
R45
i

O
~~`
R18
''r
~
R25

R21
~
~O
\

R22
O
R20
R24
R47
~---

R23R2g
'
:
R60
R62

o

GB-9
0

~~,
.~I
~~I)~1

B6M0104B

2
R63R26
R64R27

R61~

~
GB-9

3
[D808]

B6M0823A

4

A

B

C

D

SERVICE
PROCEDURE
Iwz7oo1
4-4

25
.
ABS
Control
Module
and
Hydraulic
Control
Unit
(ABSCM&H/U)
[ABS
5
.3i
Type]
-
27
.
G
Sensor
(ABS
5
.3i
Type)

E
:
INSTALLATION

1)
Install
ABSCM&H/U
.

CAUTION
:

Confirm
that
the
specifications
of
the
ABSCM&H/U
con-

forms
to
the
vehicle
specifications
.

Tightening
torque
:

18
f
5
N~m
(1
.8
±
0
.5
kg-m,
13
.0
±
3
.6ft-Ib)
2)
Connect
brake
pipes
to
their
correct
ABSCM&H/U
con-

nections
.
<
Ref
.
to
[W18A4]
.*10
>

3)
Using
cable
clip,
secure
ABSCM&H/U
harness
to

bracket
.

4)
Connect
connector
to
ABSCM&H/U
.

CAUTION
:

9
Be
sure
to
remove
all
foreign
matter
from
inside
the

connector
before
connecting
.

9
Ensure
that
the
ABSCM&H/U
connetor
is
securely

locked
.

5)
Install
air
intake
duct
.

6)
Connect
ground
cable
to
battery
.

7)
Bleed
air
from
the
brake
system
.

26
.
ABS
Sensor
(ABS
5
.3i
Type)

<
Ref
.
to
4-4
[W1400]
.*1
>

27
.
G
Sensor
(ABS
5
.3i
Type)

Ref
.
to
4-4
[W2400]
.*5
>

15

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

4-4d
[TSES1
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

G4M0700
I

Rear
Sensor
gap

G4M0701

8E8
I
CHECK
INSTALLATION
OFTONE
WHEEL
.

Tightening
torque
:

13
f
3
N~m
(1.3
f
0
.3
kg-m,
9
f
2
.2
ft-Ib)

CHECK
:
Are
thetone
wheel
installation
bolts
tight-

ened
securely?

,rES
:
Go
to
step
8E9
.

No
:
Tightentone
wheel
installation
bolts
securely
.

8E9
I
CHECK
ABS
SENSOR
GAP
.

Measure
tone
wheel-to-pole
piece
gap
over
entire
perim-

eter
of
the
wheel
.

CHECK
;
Is
the
gap
within
the
specifications
shown
in

the
following
table?

Front
wheel
Rear
wheel

Specifications0
.9
-
1
.4
mm

(0
.035
-
0
.055
in)
0
.7
-
1
.2
mm

(0
.028
-
0
.047
in)

ves
:
Go
to
step
8E10
.

No
:
Adjust
the
gap
.

NOTE
:

Adjust
the
gap
using
spacers
(Part
No
.
26755AA000)
.
If

spacers
cannot
correct
the
gap,
replace
worn
sensor
or

worn
tone
wheel
.

8E10
CHECK
HUB
RUNOUT
.

Measure
hub
runout
.

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

vES
:
Go
to
step
8E11
.

No
:
Repair
hub
.

36
Sensorgap

BRAKES
[ABS
5
.31
TYPE]
[T814]
4-4d

8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning
Light

G4M0700

G4M0701

811
1
CHECK
INSTALLATION
OF
ABS
SENSOR
.

Tightening
torque
:

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

CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-

ened
securely?

vES
:
Go
to
step
812
.

No
:
Tighten
ABS
sensor
installation
bolts
securely
.

812
1
CHECK
INSTALLATION
OF
TONEWHEEL
.l

Tightening
torque
:

13
f
3
N
"
m
(1.3
f
0
.3
kg-m,
9
f
2
.2
ft-Ib)

CHECK
:
Are
the
tone
wheel
installation
bolts
tight-

ened
securely?

vES
:
Go
to
step
813
.

No
:
Tightentone
wheel
installation
bolts
securely
.

$13
I
CHECK
ABS
SENSOR
GAP
.

Measure
tone
wheel
to
pole
piece
gap
over
entire
perim-

eterof
the
wheel
.

CHECK
:
Is
the
gap
within
the
specifications
shown
in

the
following
table?

Front
wheel
Rear
wheel

Specifications
0
.9
-
1
.4
mm

(0
.035
-
0
.055
in)
0
.7
-
1.2
mm

(0
.028
-
0
.047
in)

0
:
Go
to
step
814
.

No
:
Adjust
the
gap
.

NOTE
:

Adjustthe
gap
using
spacer
(Part
No
.
26755AA000)
.
If

spacers
cannot
correct
the
gap,
replace
worn
sensor
or

worn
tone
wheel
.

1814
1
CHECK
OSCILLOSCOPE
.

Is
an
oscilloscopeavailable?

,res
:
Go
to
step
815
.

No
:
Go
to
step
816
.

41

Sensor
gap

Sensor
gap

BRAKES
[ABS
5
.31
TYPE]
[T8J5]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

811
CHECK

FREELY'FOR
ALONG
TIME
.

TURNED

Check
if
the
wheels
havebeen
turned
freely

for
more
than
one
minute,
such
as
when
the

vehicle
is
jacked-up,
under
full-lock
corner-
ing
or
when
fire
is
not
in
contact
with
road

surface
.

The
ABS
is
normal
.
Erase
the
trouble
code
.

NOTE
:

When
the
wheels
turn
freely
for
along
time,
such
as
when

the
vehicle
is
towed
or
jacked-up,
or
when
steering
wheel

is
continuouslyturned
all
the
way,
this
trouble
code
may

sometimes
occur
.

No
:
Go
to
step
8,12
.

18J2
I
CHECK
TIRE
SPECIFICATIONS
.

CHECK
:
Are
the
fire
specifications
correct?

,res
:
Go
tostep8
.113
.

No
:
Replace
tire
.

18,13
1
CHECK
WEAR
OF
TIRE
.

CHECK
:
Is
the
fire
worn
excessively?

,res
:
Replace
tire
.

No
:
Go
tostep
8,14
.

18J4
I
CHECK
TIRE
PRESSURE
.

CHECK
:
Is
the
fire
pressure
correct?

,rES
:
Go
to
step
8J5
.

No
:
Adjust
tire
pressure
.

18,15
1
CHECK
INSTALLATION
OF
ABS
SENSOR
.

Tighteningtorque
:

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

CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-

ened
securely?

,res
:
Go
to
step
8J6
.

No
:
Tighten
ABS
sensor
installation
bolts
securely
.

49

4-4d
[TSJs1
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

G4M0700
I

G4M0701

CHECK
INSTALLATION
OF
TONE
WHEEL
.

Tightening
torque
:

13
f
3
N~m
(1.3
f
0
.3
kg-m,
9
f
2
.2
ft-Ib)

CHECK
:
Are
the
tone
wheel
installation
bolts
tight-

ened
securely?

,res
:
Go
to
step
8J7
.

No
:
Tightentone
wheel
installation
bolts
securely
.

8J7
I
CHECK
ABS
SENSOR
GAP
.

Measure
tone
wheel
to
pole
piece
gap
over
entire
perim-

eter
of
the
wheel
.

CHECK
:
Is
the
gap
within
thespecifications
shown
in

the
following
table?

Front
wheel
Rear
wheel

Specifications
0
.9
-
1.4
mm

(0
.035
-
0
.055
in)
0
.7
-
1.2
mm

(0
.028
-
0
.047
in)

,
.ES
:
Go
tostep
8J8
.

No
:
Adjust
the
gap
.

NOTE
:

Adjustthe
gap
using
spacer
(Part
No
.
26755AA000)
.
If

spacers
cannot
correct
the
gap,
replace
worn
sensor
or

worn
tone
wheel
.

18,18
1
CHECK
OSCILLOSCOPE
.

Is
an
oscilloscopeavailable?

YES
:
Go
to
step
8J9
.

No
:
Go
to
step
8,1110
.

8J9
I
CHECK
ABS
SENSOR
SIGNAL
.

1)
Raise
all
four
wheels
of
ground
.

2)
Turn
ignition
switch
OFF
.

3)
Connect
theoscilloscope
to
the
connector
(F1)
or
con-

nector(B100)
.

4)
Turn
ignition
switch
ON
.

50

t
Sensor
gap

Sensor
gap

4-4d[T8J13]
BRAKES
[ABS
5
.3i
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

8
.113
CHECK
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
all
connectors
.

3)
Erase
the
memory
.

4)
Perform
inspection
mode
.

5)
Read
outthe
trouble
code
.

CHECK
:
Is
the
same
trouble
code
as
in
thecurrent

diagnosis
still
being
output?

.rES
:
Replace
ABSCM&H/U

No
:
Go
to
step
8J14
.

CHECK
ANYOTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
:
Are
other
trouble
codes
being
output?

,rES
:
Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporarypoor
contact
.

52

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

1
8R4
I
CHECK
ABSCM&H/U
.

1)
Connect
all
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4}
Read
outthe
trouble
code
.

Is
the
same
trouble
code
as
in
thecurrent

diagnosis
still
being
output?

,rES
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
81145
.

8R5
CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

Are
other
trouble
codes
being
output?

Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

A
temporary
poor
contact
.

60

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