1997 SUBARU LEGACY sensor

BRAKES
[ABS
5
.31
TYPE]
[T8J12]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

5)
Rotate
wheels
and
measure
voltage
at
specified
fre-

quency
.

NOTE
:

When
this
inspection
is
completed,
the
ABS
control
mod-

ule
sometimes
stores
the
trouble
code
29
.

Connector
&
terminal
(B100)
No
.
12
(+)
-
No
.
13
(-)
(Front
RH)
:

(8100)
No
.
3
(+)
-
No
.
4
(
)
(Front
LH)
:

(F1)
No
.
4
(+)
-
No
.
5
(
)
(Rear
RH)
:

(F7)
No
.
1
(+)
-
No
.
2
(
)
(Rear
LH)
:

Specifiedvoltage
:
0.12
-
1
V
(When
it
is
20
Hz
.)

CHECK
:
Is
oscilloscopepattern
smooth,
as
shown
in

figure?

,rES
:
Go
tostep
8J13
.

No
:
Go
tostep
8,1110
.

8J10
CHECK

IOR
ONE

CONTAM

WHEEL'NATION

OF
ABS
SENSOR

Remove
disc
rotor
from
hub
.

CHECK
:
Is
the
ABS
sensor
pole
piece
or
the
tone

wheel
contaminated
by
dirt
or
other
foreign

matter?

,rES
:
Thoroughly
remove
dirt
or
other
foreign
matter
.

No
:
Go
to
step
8J11
.

8J11
CHECK
DAMAGE
OF
ABS
SENSOR
OR
TONE
WHEEL
.

CHECK
;
Are
there
broken
or
damaged
teeth
in
the

ABS
sensor
pole
piece
or
the
tone
wheel?

,rES
:
Replace
ABS
sensor
or
tone
wheel
.

No
:
Go
tostep
8
.112
.

18,11
2
1
CHECK
HUB
RUNOUT
.

Measure
hub
runout
.

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

,rES
:
Go
to
step
8,1113
.

No
:
Repair
hub
.

51

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

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

Y
:
TROUBLE
CODE
56

-
ABNORMAL
G
SENSOROUTPUT

VOLTAGE
-

DIAGNOSIS
:

e
Faulty
G
sensor
output
voltage

TROUBLE
SYMPTOM
:

e
ABS
does
notoperate
.

WIRING
DIAGRAM
:

F49

ABS
control
module
and
hydraulic
control
unit

Ft
P11

1
3
45678

P1
P11

ABS
G
sensor

IIIL131

F49

123456789101112131415
1
16
1
17
1
18
1
19
1
20
11
21
2
2324252627
1
28
1
29
1
30
1
31
1

84M1260
ii

64

BRAKES
[ABS
5
.3i
TYPE]
IT8Y3J4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

`G/

Tn]
1
Mark

~-ABSCM&HlU
g4M1248A

P11

2
1

D

+V-

B4M0911
B

8YI
CHECK

TURNING

LL
FOUR
WHEELS
FOR
FREE

CHECK
:
Have
the
wheels
been
turned
freely
suchas

when
the
vehicle
is
lifted
up,
or
operatedon
a
rolling
road?

The
ABS
is
normal
.
Erase
the
trouble
code
.

Go
to
step
8Y2
.

CHECK
SPECIFICATIONS
OF
ABSCM&HIU
.

Check
specifications
of
the
mark
to
the
ABSCM&H/U
.

Mark
Model

C3
AWD
AT

C4
AWD
MT

1
'
he
an
dRSCM
fnr
dWn
MAIIPI
inciallprl
nna
FWD
model?

CAUTION
:

Be
sure
to
turn
ignition
switch
to
OFF
when
removing

ABSCM&H/U
.

,rES
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
8Y3
.

18Y3
I
CHECK
INPUT
VOLTAGEOF
G
SENSOR
.

1)
Turn
ignition
switch
to
OFF
.

2)
Remove
console
box
.

3)
Disconnect
G
sensor
from
body
.
(Do
not
disconnect

connector
.)

4)
Turn
ignition
switch
to
ON
.

5)
Measure
voltage
between
G
sensor
connector
termi-

nals
.

Connector
&
terminal
(P11)
No
.
1
(+)
-
No
.
3
(
)
:

CHECK
:
Is
thevoltage
between
4
.75
and
5
.25
V?

Go
to
step
8Y4
.

No
:
Repair
harness/connector
between
G
sensor
and

ABSCM&H/U
.

85

4-4d[T8Y4]
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Codeby
ABS
Warning
Light

1

1
2
34
5
67
819
h
011
111
211311411
l1
gi
18191201211221
23
1
24
1
25
1
26
1
7Ed2
30131

LS
B4M1261A

F49
F49

8Y4
CHECKOPEN
IN
G
SENSOR
-

PUT
HARNESS
A
DuGROUND
HA
NESS
.T

1)
Turn
ignition
switch
to
OFF
.

2}
Disconnect
connector
from
ABSCM&H/U
.

3)
Measure
resistance
between
ABSCM&H/U
connector

terminals
.

Connector
&
terminal

(F49)
No
.
30
-
No
.
28
:

CHECK
;
Is
the
resistance
between
4
.3
and
4
.9
kS2?

,rEg
:
Go
to
step
8Y5
.

No
:
Repair
harness/connector
between
G
sensor
and

ABSCM&H/U
.

8Y5
CHECK
GROUND

OUTPUT
HARN

SSHORT
IN
G
SENSOR

1)
Disconnect
connector
from
G
sensor
.

2)
Measure
resistance
between
ABSCM&H/U

and
chassis
ground
.

Connector
&
terminal

(F49)
No
.
6
-
Chassis
ground
:

CHECK
;
Is
the
resistance
more
than
1
M52?

S
:
Go
to
step
8Y6
.

connector

No
:
Repair
harness
between
G
sensor

ABSCM&H/U
.

and
8Y6
CHECK
BATTERY
SHORT
OF
HARNESS
.

Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

(F49)
No
.
6
(+)
-
Chassis
ground
(-)
:

CHECK
;
Is
the
voltage
less
than
1
V?

,rES
:
Go
to
step
8Y7
.

No
:
Repair
harness
between
G
sensor
and

ABSCM&H/U
.

86

-
84M1262A
I

B4M1263A
I

BRAKES
[ABS
5
.31
TYPE]
IT8Y$I4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

$Y7
CHECK
BATTERY
SHORT
OF
HARNESS
.

1)
Turn
ignition
switch
to
ON
.

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

chassis
ground
.

Connector
&
terminal

(F49)
No
.
6
(+)
-
Chassis
ground
(
)
:

CHECK
;
Is
the
voltage
less
than
1
V?

Go
to
step
8Y8
.

No
:
Repair
harness
between
G
sensor
and

ABSCM&H/U
.

8Y8
I
CHECK
GROUND
SHORT
OF
HARNESS
.

Measure
resistance
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

(F49)
No
.
28
-
Chassis
ground
:

CHECK
;
Is
theresistance
more
than
1
MS2?

Go
to
step
8Y9
.

No
:
Repair
harness
between
G
sensor
and

ABSCM&H/U
.

Replace
ABSCM&H/U
.

87

4-4d
[rsYS1
BRAKES
[ABS
5
.3i
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

B4M0915I

Front

t

1

0

B4M0917A

0

Front

i
a

--

B4M0918A

1
8Y9
I
CHECK
G
SENSOR
.
I

1)
Turn
ignition
switch
to
OFF
.

2)
Remove
G
sensor
from
vehicle
.

3)
Connect
connector
to
G
sensor
.

4)
Connect
connector
to
ABSCM&H/U
.

5)
Turn
ignition
switch
to
ON
.

6)
Measure
voltage
between
G
sensor
connector
termi-

nals
.

Connector
&
terminal

(P11)
No
.
2
(+)
-
No
.
1(
)
:

CHECK
:
Is
thevoltage
between
2
.1
and
2
.4
V
when
G

sensor
is
horizontal?

0
:
Go
tostep
8Y10
.

No
:
Replace
G
sensor
.

8Y10
CHECK
G
SENSOR
.

Measure
voltage
between
G
sensor
connector
terminals
.

Connector
&
terminal

(P11)
No
.
2
(+)
-
No
.
1(
)
:

CHECK
;
Is
the
voltage
between
3
.7
and
4
.1
V
when
G

sensor
is
inclined
forwards
to
90°?

Go
tostep
8Y11
.

No
:
Replace
G
sensor
.

CHECK
G
SENSOR
.

Measure
voltage
between
G
sensor
connector
terminals
.

Connector
&
terminal

(P11)
No
.
2
(+)
-
No
.
1
(
)
:

CHECK
;
Is
thevoltage
between
0
.5
and
0
.9
V
when
G

sensor
is
inclined
backwards
to
90°?

Go
tostep
8Y12
.

No
:
Replace
G
sensor
.

8Y12
CHECK
POOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connector
between

ABSCM&HI
U
and
G
sensor?
<
Ref
.
to
FORE-

WORD
[T3C1]
.*10
>

0
:
Repair
connector
.

No
:
Go
to
step
8212
.

88

4-4d
[TSOO1
BRAKES
[ABS
5
.31
TYPE]

9
.
Select
Monitor
Function
Mode

o

°~°

poo

I
\G2M0096

9
.
Select
Monitor
Function
Mode

Applicable
cartridge
of
select
monitor
:
No
.
498346300

A
:
LIST
OF
FUNCTION
MODE

1,
F
MODE
(ROM
ID,
ANALOG
DATA
ARE

DISPLAYED
.)

Function
code
it
M
i
C
easur
ng
ems
ontents
to
be
monitored
Scroll
Ref
.
to
Code
Abbreviation

F00
ROM
ID
ECM
identification
ROM
ID
number
of
ECM
is
read
and
enabled
possible
[T9B0]*10
communication
state
is
displayed
.

F01
FRFR
wheel
speedWheel
speed
detected
by
the
FR
ABS
sensor
is
possible
[T9COJ*10
(mile/h)
displayed
in
mile/h
.

F02
FLFL
wheelspeed
Wheel
speed
detected
by
the
FL
ABS
sensor
is
Possible
[T9D0]x10
(mile/h)
displayed
in
mile/h
.

F03
RR
RR
wheel
speedWheelspeed
detected
by
the
RR
ABS
sensor
is
possible
[T9E0]*10
(mile/h)
displayed
in
mile/h
.

F04
RLRL
wheel
speed
Wheel
speed
detected
by
the
RL
ABS
sensor
is
possible
[T9F0]*10
(mileJh)
displayed
in
mile/h
.

F05
FRFR
wheelspeed
Wheel
speed
detected
by
the
FR
ABS
sensor
is
possible
[T9C0j*10
(km/h)
displayed
in
km/h
.

F06
FL
FL
wheel
speedWheelspeed
detected
by
the
FL
ABS
sensor
is
possible
[T9D0]*10
(km/h)
displayed
in
km/h
.

F07
RRRR
wheel
speedWheelspeed
detected
by
the
RR
ABS
sensor
is
Possible
[T9E0]*10
(km/h)
displayed
in
km/h
.

F08
RLRL
wheel
speedWheelspeed
detected
by
the
RL
ABS
sensor
is
possible
[T9FO]w10
(km/h)
displayed
in
km/h
.

F09
BLS
Stop
light
switch
Stop
light
switch
monitor
voltage
is
displayed
.
Possible
[T9G0]d10
monitor

G
sensor
output
Refers
to
vehicleacceleration
detecting
by
the
[T9H0]*10
F10
G-SENS
voltage
(V)
analog
G
sensor
.
It
appears
on
theselect
moni-
Possible

for
display
in
volts
.

90