1997 SUBARU LEGACY brake sensor

4-4d
[r1oHy3l
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
F49

B4M1240A
I

I

-

r10H13
CHECK
BATTERY
SHORT
OFHARNESS
.

Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

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

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

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

l-)~

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

CHECK
:
Is
thevoltage
less
than
1
V?

,rES
:
Go
to
step
10H14
.

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

sensor
.

I10H14
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
/
(F49)
No
.
9
(+)
-
Chassis
ground

(-)

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

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

(-)

CHECK
:
Is
thevoltage
less
than
1
V?

,rES
:
Go
to
step
10H15
.

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

sensor
.
1
10H15
I
CHECK
INSTALLATION
OF
ABS
SENSOR
.

Tightening
torque
:

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

CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-

ened
securely?

,res
:
Go
to
step
10H16
.

No
:
Tighten
ABS
sensor
installation
bolts
securely
.

118

BRAKES
LABS
5
.31
TYPE]
[T10H18]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

G4M0700I

G4M0701
I

10H16
I
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
thetone
wheel
installation
bolts
tight-

ened
securely?

vES
:
Go
to
step
10H17
.

No
:
Tightentone
wheel
installation
bolts
securely
.

(CHECK
ABS
SENSOR
GAP
.

Measure
tone
wheel-to-poke
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)

,rES
:
Go
tostep
10H18
.

No
:
Adjust
the
gap
.

NOTE
:

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

spacers
cannot
correct
the
gap,
replace
worn
sensor
or

worn
tone
wheel
.

10H18
CHECK
HUB
RUNOUT
.

Measure
hub
runout
.

CHECK
:
Is
the
runout
less
than0
.05
mm
(0
.0020
in)?

Go
tostep
10H19
.

No
:
Repair
hub
.

119

T
Sensorgap
Sensor
gap

4-4d
[TloHis1
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
with
Select
Monitor

Except
OUTBACK
model

iz

L
j
B4M0818E

OUTBACK
model

Front
Rear

1
2
2
1

D

84M1042C

1
10H19
I
CHECK
GROUND
SHORT
OF
ABS
SENSOR
.

1)
Turn
ignition
switchto
ON
.

2)
Measure
resistance
between
ABS
sensor
and
chassis

ground
.

Terminal

Front
RH
No
.
7
-
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
Mn?

,mss
:
Go
to
step
10H20
.

No
:
Replace
ABS
sensor
and
ABSCM&H1U
.

[
MI-120
I
CHECK
GROUND
SHORT
OF
HARNESS
.

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
l
(F49)
No
.
11
-
Chassis
ground
:

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

Trouble
code
25
l
(F49)
No,
14
-
Chassis
ground
:

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

CHECK
:
Is
the
resistance
more
than
1
1140?

,rES
:
Go
to
step
10H21
.

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

sensor
.

And
replace
ABSCM&H/U
.

CHECKPOOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connectors
between

ABSCM&HlU
and
ABS
sensor?
<
Ref
.
to

FOREWORD
[T3C1]
.*10
>

vES
:
Repair
connector
.

No
:
Go
to
step
10H22
.

120

BRAKES
[ABS
5
.31
TYPE]
[T10H23]
4-4d

10
.
DiagnosticsChart
with
Select
Monitor
~10H22
I
CHECK
ABSCM&H/U
.

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
the
current

diagnosis
still
being
output?

vES
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10H23
.

10H23
CHECK
ANY
I
APPEARANCE

.THER
TROUBLE
CODES

CHECK
:
Are
other
trouble
codes
being
output?

U
:
Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

A
temporary
poor
contact
.

NOTE
:

Check
harness

and
ABS
sensor
.

and
connectors
between
ABSCM&H/U

121

4-4d
[T1o1o1
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

D
"
NEW
22
(FBI)

FR
.SS
SOFT

84M0812

D
"
NEW
24
(FBI)

FL
.SS
SOFT

84M0949

D
"
NEW
26
(FBI)

RR
.SS
SOFT

84M0950

D
"
NEW
28
(FBI)

RL
.SS
SOFT

B4M0951

1
:
TROUBLE
CODE
22
FR
.
SSSOFT

-
ABNORMAL
FRONT
RH
ABS
SENSOR

(ABNORMAL
ABS
SENSOR
SIGNAL)
-

J
:
TROUBLE
CODE
24
FL
.
SS
SOFT

-
ABNORMAL
FRONT
LH
ABS
SENSOR

(ABNORMAL
ABS
SENSOR
SIGNAL)
-

K
:
TROUBLE
CODE
26
RR
.
SS
SOFT

-
ABNORMAL
REAR
RH
ABS
SENSOR

(ABNORMAL
ABS
SENSOR
SIGNAL)
-

L
:
TROUBLE
CODE
28
RL
.
SS
SOFT

-
ABNORMAL
REAR
LH
ABS
SENSOR

(ABNORMAL
ABS
SENSOR
SIGNAL)
-

122

BRAKES
[ABS
5
.3i
TYPE]
[T10L0]4-4d

10
.
Diagnostics
Chart
withSelect
Monitor

DIAGNOSIS
:

"
Faulty
ABS
sensor
signal
(noise,
irregular
signal,
etc
.)

Faulty
harness/connector

TROUBLE
SYMPTOM
:

e
ABS
does
not
operate
.

WIRING
DIAGRAM
:

9

ABS
control
module
and
hydraulic
control
unit

Twisted
wire
Ft
0

8100

815

Front
ASS
sensorLH

RearABS
sensorLH
Rear
ABS
sensor
RH

r----------------
1
OUTBACK
with
step
roof
model
I

I
Q
I

RearABS
7
sensor
LH
I
~
III
j
~
Rear
ASS
j
sensor
RH

I
O
I
L---
.
.
.---------J

OUTBACK
with
steproof
model
B~5
O

OOOO
fl

(i~]
DO`]
478
1
10

F49

1234567891011131415
1617181920
1
212
23
4
5
26
218930
13
1
1

B4M1238

Front
ASS
sensor
RH

123

4-4d
[T1
01-111
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withselect
monitor

FR
(F05)

30
km/h

B4M0922

(SELECT

CHECK
OUTPUT
MONITOR

F
ABS
SENSOR
USING

Read
the
ABS
sensor
output
corresponding
to
the
faulty

system
in
the
select
monitor
function
mode
.

NOTE
:

The
select
monitor
display
shows
that
the
front
right
wheel

is
rotating
at
30
km/h
.

CHECK
:
Does
the
speed
indicated
on
the
display

change
in
response
to
the
speedometer

reading
during
acceleration/deceleration

when
the
steering
wheel
is
in
the
straight-

ahead
position?

Go
to
step
1012
.

No
:
Go
to
step
10L8
.

I1011-2
CHECK
POOR
CONTACT
IN
CONNECTORS
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
in
connectors
between

ABSCM&HfU
and
ABS
sensor?

,rES
:
Repair
connector
.

No
:
Go
to
step
10L3
.

10L3
I
CHECK
SOURCES
OF
SIGNAL
NOISE
.

CHECK
:
Is
the
cartelephone
orthe
wireless
transmit-

ter
properly
installed?

Go
to
step
10L4
.

No
:
Properly
install
the
car
telephone
or
the
wireless

transmitter
.

1
10L4
I
CHECK
SOURCES
OF
SIGNAL
NOISE
.

Are
noise
sources
(such
as
an
antenna)

installed
near
the
sensorharness?

Install
the
noise
sources
apartfromthe
sensor

harness
.

No
:
Go
to
step
10L5
.

124

BRAKES
[ABS
5
.31
TYPE]
[r1oLs1
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

8100

1
91817161
5
1
4
1
3
21
2
191
76
51
11
11

J

84M1244A

10L5
CHECK
SHIELD
CIRCUIT
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
all
connectors
.

3)
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
l
Go
to
step
10L6
.

Trouble
code
28
I
Go
to
step
10L6
.

CHECK
:
Is
the
resistance
less
than0
.5
S2?

Go
to
step
10L6
.

No
:
Repair
shield
harness
.

10L6
CHECK
ABSCM&H/U
.

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
the
current

diagnosis
still
being
output?

Replace
ABSCM&H/U
.

No
:
Go
to
step
10L7
.

10L7
CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
:
Are
othertrouble
codes
being
output?

Proceed
withthe
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
noise
interference
.

11011-8
1
CHECK
INSTALLATION
OF
ABS
SENSOR
.
I

Tightening
torque
:

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

Are
the
ABS
sensor
installation
bolts
tight-

ened
securely?

Go
to
step
10L9
.

Tighten
ABS
sensor
installation
bolts
securely
.

125