1997 SUBARU LEGACY ECO mode

SERVICE
PROCEDURE
[W25D21
4-4

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

Diagnosis
connector
--J

1

I`

--~
~
''-
Diagnosis
terminals

3
terminal
6
terminal
-
/

B4M0082D
D
:
ABS
SEQUENCE
CONTROL

1)
Under
the
ABS
sequence
control,
after
thehydraulic

unit
solenoid
valve
is
driven,
theoperation
of
thehydrau-

lic
unit
can
be
checked
by
means
of
the
brake
tester
or

pressure
gauge
.

2)
ABS
sequence
control
can
be
started
by
diagnosis

connector
or
select
monitor
.

1
.
OPERATIONAL
GUIDELINES
OF
THE
ABS

SEQUENCE
CONTROL
WITH
DIAGNOSIS
CONNECTOR

1)
Connect
diagnosis
terminals
to
terminals
No
.
3
andNo
.

6
of
the
diagnosis
connector
beside
driver's
seat
heater

unit
.

2)
Setthe
speed
of
all
wheels
at
4
km/h
(2
MPH)
or
less
.

3)
Turn
ignition
switch
OFF
.

4)
Within
0
.5
seconds
after
the
ABS
warning
light
goes

out,
depress
the
brake
pedal
and
hold
it
immediately
after

ignition
switch
is
turned
to
ON
.

CAUTION
:

Do
not
depress
the
clutch
pedal
.

NOTE
:

*
When
the
ignition
switch
is
setto
on,the
brake
pedal

must
not
be
depressed
.

Engine
must
not
operate
.

5)
After
completion
of
ABS
sequence
control,
turn
ignition

switch
OFF
.

2
.
OPERATIONAL
GUIDELINES
OF
THE
ABS

SEQUENCE
CONTROL
WITH
SELECT
MONITOR

NOTE
:

In
the
event
of
any
trouble,
the
sequence
control
may
not

be
operative
.
In
such
a
case,
activate
the
sequence

control,
referring
to
"OPERATIONAL
GUIDELINES
OF
THE

ABS
SEQUENCE
CONTROL
WITHDIAGNOSIS
CONNEC-

TOR
"
.
<
Ref
.
to
4-4
[W25D1],*10>

1)
Connect
select
monitor
to
data
link
connector
beside

driver's
seat
heater
unit
.

2)
Turn
ignition
switch
ON
.

3)
Put
select
monitor
to
ABS
mode
.

11

SERVICE
PROCEDURE
[w2sDa1
4-4

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

AB
S
FUNCTION

CHECK
END

B4M1030

MODE
RESTART?

0
:
YE
S
1
:
NO

H4M
1144

10)
After
completion
of
ABS
sequence
control
.

11)
Press0key
tostart
ABS
sequence
control
again
and

press
1
key
to
end
.

3
.
CONDITIONS
FOR
COMPLETIONOF
ABS

SEQUENCE
CONTROL

When
the
following
conditions
develop,
the
ABS
sequence

control
stops
and
ABS
operation
is
returned
to
the
normal

control
mode
.

1)
When
the
speed
ofat
least
one
wheel
reaches
10
km/h

(6
MPH)
.

2)
When
terminal
No
.
3
or
No
.
6
are
separated
from
diag-

nosis
terminals
.
(When
select
monitor
is
not
used
.)

3)
When
the
brakepedal
is
released
during
sequence

control
and
the
braking
lamp
switch
is
set
to
off
.

4)
When
brake
pedal
is
depressed
afterignition
key
is

turned
to
ON,
and
before
ABS
warning
light
goes
out
.

(When
select
monitor
is
not
used
.)

5)
When
brakepedal
is
not
depressed
after
ignition
key

is
turned
to
ON,
acrd
within
0
.5
seconds
after
ABS
warn-

ing
light
goes
out
.
(When
select
monitor
is
not
used
.)

6)
After
completion
of
the
sequence
control
.

7)
When
malfunction
is
detected
.
(When
select
monitor
is

used
.)

13

BRAKES
[ABS
5
.31
TYPE]
'
[T501]
4-4d

5
.
Control
Module
I/O
Signal

Terminal

N
Input/Output
signal
Contents
o
.

_)
Measured
value
andmeasuring
conditions

ABS
Front
left
wheel
9-10

sensor'2
Front
right
wheel
11-12
0
.12
-
1
V
(Wheel

speed
Rear
left
wheel
7-8
(When
it
is
20Hz
.)

sensor)
Rear
right
wheel
14-15

Valve
relay
power
supply
24-23
10
-
15
Vwhen
ignition
switch
is
ON
.

Motor
relay
power
supply
25-23
10
-
15
Vwhen
ignition
switch
is
ON
.

G
sensor'2
Power
supply
30-28
4
.75
-
5
.25
V

(AWD
model
ground
28
-

only)
output
6-28
2
.3f0
.2
V
when
vehicle
isin
horizontal
position
.

Stop
light
switch*1
2-23
Less
than
1
.5
V
when
the
stop
light
is
OFF
and,10
-
15
V

when
thestop
light
is
ON
.

ABS
warning
light`2
21-23
Less
than
1.5
V
during
1
.5
seconds
when
ignition
switch
is

ON,and
10
-
15
V
after
1.5
seconds
.

AT
ABS
signal'2

(AT
model
only)
31-23
Less
than
1
.5
V
when
the
ABS
control
does
not
operate
still

and
more
than5
.5
V
when
ABS
operates
.

ABS
operation
signal
monitor*2
3--23
Less
than
1
.5
V
when
the
ABS
control
does
not
operate
still

and
more
than5
.5
V
when
ABS
operates
.

Select
Data
is
received
.
20-23
Less
than
1
.5
V
when
no
data
is
received
.

monitor'2
Data
is
sent
.
5--23
4
.75
-
5
.25
V
when
no
data
is
sent
.

ABS
Terminal
No
.
3
29-23
10
-
15
V
when
ignition
switch
is
ON
.
diagnosis

connector*2
Terminal
No
.
6
4-23
10
-
15
V
when
ignition
switch
is
ON
.

Power
supply'1
1-23
10
-
15
V
when
ignition
switch
is
ON
.

Grounding
line
23
-

Grounding
line
~26

*1
:
Measure
the
I/O
signal
voltage
after
removing
the
connector
from
the
ABSCM&H/U
terminal
.
'2
:
Measure
the
I/O
signal
voltage
at
connector
(F2)
or
(Fi)
.

9

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

6
.
Diagnostics
Chart
for
On-board
Diagnosis
System

I
TROUBLE
OCCURS
.I

Is
Select
Monitor
available?
I
Yes
1
10
.
Diagnostic
Chart
with
Select
1
Monitor
.

Ask
the
customer
when
and
how
the
trouble
occurred
using
interview
check
list
.

6
.
Diagnostics
Chart
for
On-board

Diagnosis
System

A
:
BASIC
DIAGNOSTICS
PROCEDURE

I
PRE-INSPECTION
I

I
CALLING
UPA
TROUBLE
CODE
.
I

No
trouble
code
is
readable
.
Inspection
using
Diagnostic
Chart
for
Warning
Light
Failure
.

Record
all
trouble
codes
.
Only
the
start
code
is
issued
.

Trouble
codes
are
issued
.

Perform
diagnostics
in
accordance
with
trouble
code
.

Trouble
code
I
Repair
.
designated
.

Clear
memory
.

I
INSPECTION
MODE
I

I
CALLING
UPA
TROUBLE
CODE
.

Only
the
star
t
code
is
issued
.

CONFIRMATION
TEST

END

Inspection
using
General
Diagnostics
chart
.

B4M
1051
A

CAUTION
:

Remove
foreign
matter
(dust,
water,
etc
.)
from
the

ABSCM&H/U
connector
during
removal
and
installation
.

NOTE
:

e
To
check
harness
for
broken
wires
or
short
circuits,

shake
it
while
holding
it
or
the
connector
.

*
When
ABS
warning
light
illuminates,
read
and
record

trouble
code
indicated
by
ABS
warning
light
.

11

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[T6D2]
BRAKES
[ABS
5
.3i
TYPE]

6
.
Diagnostics
Chart
for
On-board
Diagnosis
System

Diagnosis
connector
-J

_
~\~
°°

Diagnosis
terminals
3
terminal
6
terminal
/

84M00820

2
.
CLEARING
MEMORY

1)
After
calling
up
a
trouble
code,disconnect
diagnosis

connector
terminal
6from
diagnosis
terminal
.

2)
Repeat
3
times
within
approx
.
12
seconds
;
connecting

and
disconnecting
terminal
6
and
diagnosis
terminal
for

at
least
0
.05
seconds
each
time
.

Trouble
code
indication
mode
Memory
erase
mode

ABS
warning
lamp

GND
(Low
level)
U
U
GND
open
(High
level)

Terminal
6
Ad
.1
.4
1.5
sec
0
.2
sec
or
more
0
.05
sec
or
more

12sec
or
less

B4M0233D

NOTE
:

After
diagnostics
is
completed,
make
sure
to
clear
mem-

ory
.
Make
sureonly
start
code
(11)
is
shown
after
mem-

ory
is
cleared
.

16

BRAKES
[ABS
5
.31
TYPE]
[T9A3]
4-4d

9
.
Select
Monitor
Function
Mode

2
.
FA
MODE
(ON/OFF
DATA
ARE
DISPLAYED
.)

Function
code
M
it
i
b
i
C
l
Code
Abbreviation
easur
ng
ems
ontents
to
e
mon
toredScrol
Ref
.
to

131
Stop
light
switch
LED
1
comes
on
withthe
switch
on
(with
the

brake
pedal
down)
.

VR
Valve
relay
signal
LED
2
comes
on
withthevalverelay
off
.

MR
Motor
relay
signal
LED
3
comes
on
with
the
motor
on
.

FAO
ATAT
ABS
signal
LED
4
comesonwhen
ABS
control
is
on
.
Possible
[T910]*10

AW
ABS
warning
light
LED
6
comes
on
when
the
warning
light
is
on
.

VM
Valve
relay
monitor
LED
1
comes
on
with
thevalverelay
off
.

MM
Motor
relay
monitor
LED
8
comes
on
when
the
motor
relay
is
on
.

CM
CCM
signal
LED
9
comes
on
when
ABS
control
is
on
.

3
.
FB
MODE
(TROUBLE
CODES
ARE
DISPLAYED
.)

Function
code
M
i
s
easuring
tem
Contents
to
be
monitored
Scroll
Ref
.
to
Code
Abbreviation

D~ALL
A
maximum
of
3
trouble
codes
are
displayed
in

order
of
occurrence
.

D~NEW
The
most
recent
trouble
code
appears
on
the

select
monitor
display
.

FB1
D~MID
Historyoftrouble
The
second
most
recent
trouble
code
appears
Possible
[T10B0]*10codes
is
displayed
.
on
the
select
monitor
display
.

D~OLDThe
third
most
recent
trouble
code
appears
on

the
select
monitor
display
.

D~REF
A
specified
period
of
time
proceeding
trouble

code
appears
on
the
select
monitor
display
.

Do
*a*
22?(FB1)

FR
.
SS
SOFT

84M0919

NOTE
:

9
If
a
particular
trouble
code
is
notproperly
stored
in

memory
(due
to
a
drop
in
ABSCM&H/U
power
supply,
etc
.)

when
a
problem
occurs,
the
trouble
code,
followed
bya

question
mark
"?",
appears
on
the
select
monitor
display
.

This
shows
it
may
be
an
unreliable
reading
.

9*
a*
refers
to
the
troubles
in
order
of
occurrence
(NEW
.

MID,
OLD
and
REF)
.

91

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

9
.
Select
Monitor
Function
Mode

MEMORY
C
LR
?

0
:
YES
1
:N0

B4M0930

OF
OC~O
ENT

84M0931
I

MEMORY
C
LR
?

0
:
YES
1
:
NO

B4M0930

MEMORY
C
LR
?

*O
:YES
1
:N0

84M0933

PLEASE

KEY
OFF

84M0934

J
:
MODE
FCO

-
HISTORY
OF
TROUBLE
CODES
IS
ERASED

(D
"
CLR)
-

e
Deletes
therecorded
trouble
codes
in
ABS
control
mod-

ule
.

1)
Pressthe
function
key
[F]
[C]
[O]
[ENT]
in
that
order
.

2)
System
indicates
as
shown
.

3)
Press
thefunction
key
[0],
to
clear
memories
.
The
indi-

cation
of
*
is
added
to
screen
.

4)
Press
thefunction
key[ENT]
.
System
indicates
as

shown
.

5)
Turn
ignition
switchto
OFF
.

98