parking brake SUBARU LEGACY 1996 Service Repair Manual

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[raFi]
2-7
3
.
Diagnosis
System

I
ST
I

1-1
ooaao0000000000oaooo

OBD0669A
I

ST2

00000
I
0
0
(03C03
0

~
00000
;
i~~
C01-

ST1

OBDD057A

9
Using
data
link
connector
for
Subaru
select
monitor

and
OBD-II
general
scan
tool
:

(1)
Connect
ST
to
Subaru
select
monitorcable
.

ST
498357200
ADAPTER
CABLE

(2)
Open
the
cover
and
connect
Subaru
select
moni-

torto
data
link
connector
located
in
thelower
portion

of
the
instrument
panel(on
the
driver'sside),to
the

lower
cover
.

CAUTION
:

Do
not
connect
scan
tools
except
for
Subaru
select
mon-

itor
and
OBD-II
general
scan
tool
.

6)
Turn
ignition
switch
to
ON
(engine
OFF)
and
Subaru

select
monitor
switch
to
ON
.

7)
Start
the
engine
.

NOTE
:

Ensure
the
selector
lever
is
placed
in
the
"P"
position

before
starting
.

8)
Using
the
selector
lever
or
shift
lever,
turn
the
"P"
posi-

tion
switch
and
the
"N"
position
switch
to
ON
.

9)
Depress
the
brake
pedal
to
turn
the
brake
switch
ON
.

10)
Keep
engine
speed
in
the
2,500-3,000
rpm
range
for

40
seconds
.

NOTE
:

On
models
without
tachometer,
usethe
Subaru
select

monitor
or
tachometer
(Secondary
pickup
type)
.

11)
Place
the
selector
lever
or
shift
lever
in
the
"D"
posi-

tion
and
drive
the
vehicle
at
5
to
10
km/h
(3to
6
MPH)
.

NOTE
:

On
AWD
vehicles,
release
the
parking
brake
.

F
:
COMPULSORY
VALVE
OPERATION
CHECK

MODE

1
.
SUBARU
SELECT
MONITOR

1)
Prepare
Subaru
select
monitor
and
cartridge
.

ST1
498307500
SELECT
MONITOR
KIT

ST2
498345700
CARTRIDGE

39

2-7
Rioo2]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
General
Diagnostics
Table

41
Problem
parts
,-
CI,
~o
0
0-
N
N
N
L
yy
I
C

L
dCN
CN
f0
qp
ZNa
f0
j
¢m
r
NMLUr
7y
mr
'
~
.
`
.
"
UVUU
0
rJ
"
q0
N
d
N
dm
d
d
LY~O
.'~
O
LO
OO
O
~
d
OC
OC
~
OCOCOC
m
>
A
1
m~V>
d
O
~
OC
r
7
Uo
E
ym
y
m
~,
"
U

~
-
U
3
y

E
d

a
d
Y
i
N

m>
~

_m
>
E

_m
>
E

A>
E

a
E
d
m
om
y
0d
N
0m
N
d
0
N
d0
N
>
~
n
"
C
a
j
d
N
d
N

.
mo
N
CC
O
U
L
dU
L
d
d
m
G1
~
V~
0~a60U
0U
0V
0U

,

V-
F
C~
~
7
~
7
~L~L~t
C
O
41
dCWC~C~
WC~
T7
_v>>
~nv~~n
.
r-
xaaa
a
a
in
o
o
(D(ncn
voMPP
P
o

Symptom
1
2
345678910
11
12131415161718
,
19
2021
22
23
.24
25
1
26
1
27
28
29Engine
brake
is
noteffected
when
select
lever
isin
"3"
or
"2"range
.

Engine
brake
is
noteffected
when
select""
lever
isin
1
range
.

Shift
characteristics
areerroneous
.
OOOOOO

No
lock-up
occurs
.
OOOO

Vehicle
cannotbe
set
in
"D"
range
power
OO
mode
.

"D"
range
power
mode
cannotbe
released
.
OOO

Parking
brake
is
not
effected
.
OO

Shift
lever
cannot
be
moved
or
is
hard
to
"
"
move
from
P
range
.

Select
lever
is
hard
to
move
.
OOOO

Select
lever
is
too
light
to
move
(unreason-
OO
able
resistance)
.
ATF
spurts
out
.

Differential
oil
spurtsout
.

Differential
oil
level
changes
excessively
.

Odor
is
producedfrom
oil
supply
pipe
.
OO
Shock
occurs
when
selectlever
is
moved
""
"
"
OOO
O
OO
from
1
2
range
.
to

Slippage
occurs
when
selectlever
is
moved
"""
"
OOOOOO
from
1
to
2
range
.

Shock
occurs
when
selectlever
is
moved
"
""
"
OOOOOO
from
2
to
3
range
.

Slippage
occurs
when
selectlever
is
moved
""
O
OO
OOO
from
"2to
"3
range
.

Shock
occurs
when
select
lever
is
moved
"
"""
OOOOOO
from
4
range
.
3
to

Slippage
occurs
when
selectlever
is
moved
"
"
0OOOOO
to
"4from
"3
range
.

Shock
occurs
when
select
lever
is
moved
""
0OOO
O
from"3
to"2
range
.

Shock
occurs
when
selectlever
is
moved
"
UOOOO
from
"D
to
"1"
range
.

Shock
occurs
when
selectlever
is
moved
"
"
OO
O
OO
to"1
from"2
range
.

Shock
occurs
when
accelerator
pedal
is
O
OOO
O
released
at
medium
speeds
.

Vibration
occurs
during
straight-forward
OO
operation
.

Select
leveeslips
out
ofposition
during
acceleration
or
while
driving
onrough
ter-
OOO
U
rain
.

Vibration
occurs
during
turns
(tight
corner
"
OOOOOOOOO
"braking
phenomenon)
.

Front
wheel
slippage
occursduring
standing
OOOOOOOOOOO
starts
.

Vehicle
is
not
set
in
FWD
mode
.
O
O
vOO

1
23456i
7
8910
11T
21314
x
15
1
~
i
1819
~20
~
I
22226
272829

72

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T1002
2-7
10
.
General
Diagnostics
Table

3000
`
r
U
VO

o

O

c~
a
~°om
.
m
~
22
r
Problem
parts

p

C
o,

~
~
y

r

Y
7

v

~
y
Y
`m
~

~
dsE
C
T
o

O
C

o

r

°

d

Y
G
Cc
OC
fC
~
cd
M
c
l0
d
m
a
a
L
r
~m
Y
l0
d>d
~
UU
],
U
),
yp
~
!C
r
~
L
y
~
1
"
~
0r
!E
CU
U
~E
~
~
O
.m
0
Q7
A
c
dy
iN

a

>C3
41
L
m
Nd
IM
N
al

E7
~-
U
L

a

C
p~
N

>

~y
it
M3
~
7
N
7
7
a

~yC
"
Uaj
~
a
7
U

a
7
U

6
.
>
d
C7
~
C
C
w
C

OD
p
UQO~
0
~O2m
3
J
OC
OOD
EO
4
.
V
Q>D
F~-
JJ
lL
Q
IL
QO
OI
W~Wd

30
31
32
133
134
35
36
3738
39
40
41
4243
4445
46
47
48
49
50
5152
53
54
5556
57
58
Symptom

Engine
brake
is
noteffected
when
select"lever
isin
"3or
"2"
range
.

U
Enginebrake
is
not
effected
when
select
lever
isin
"1"
range
.

Shift
characteristics
are
erroneous
.

OO
No
lock-up
occurs
.
Vehicle
cannot
be
set
in
"D"
range
power
mode
.

"D"
range
power
mode
cannot
be
released
.
O
Parking
brake
is
noteffected
.
Shift
lever
cannotbe
moved
or
is
hard
to
move
from
"P"
range
.
Select
levee
is
hard
to
move
.

Select
lever
is
too
light
to
move
(unreason-
able
resistance)
.

O
ATF
spurts
out
.
O
Differential
oil
spurts
out
.
O
O
Differential
oil
level
changes
excessively
.

O
OO
1
0
1
0OO
Odor
is
produced
from
oil
supply
pipe
.

OOQ
Shock
occurs
when
selectlever
is
moved
"""
from
1
to"2
range
.

Slippage
occurs
when
selectlever
is
moved
"
from
"1to
"2"
range
.

nvOO
Shock
occurs
when
select
lever
is
moved
"
"
"
"
from
2to3
range
.

OO
Slippage
occurs
when
selectlever
is
moved
""
from"2
to"3
range
.

OOOO
Shock
occurs
when
selectlever
is
moved
""
""
from3
to
4range
.

p
Slippage
occurs
when
select
lever
is
moved
"
from
"3"
to
"4
range
.

OO
O
Shock
occurs
when
selectlever
is
moved
"
"
""
from
2
range
.
3
to

Shock
occurs
when
selectlever
is
moved
"
"""
from
D
to
1
range
.

OO
Shock
occurs
when
selectlever
is
moved
""""
from
2
1
range
.
to

OO
Shock
occurs
when
accelerator
pedal
is
released
at
medium
speeds
.

O
O
Vibration
occurs
during
straight-forward
operation
.

Select
lever
slips
out
of
position
during
acceleration
or
while
driving
on
rough
ter-rain
.

Vibration
occurs
during
turns
(tight
corner
"
"
braking
phenomenon)
.

Front
wheel
slippage
occurs
during
standing
starts
.

Vehicle
is
not
set
in
FWD
mode
.

30313233
3435
36
~
37
-1
38
-
I
39
i
40
I
41
r
42
i
43
-1
44
1
45
-1
46
47~
I
48
-
49
I
T
50
~f
51
I
52
I
556
I
57
I
58
I
I

73

s-$
[D601]
WIRING
DIAGRAM

6
.
Wiring
Diagram

No
.
Load

MB-2
Powerwindow
circuit
breaker

Engine
control
module

Fuel
pump
relay
MB-3
Main
relay

OBD-II
service
connector

MB-4A/C
relay
holder

MB-6
Headlight
LH

Diode
(Lighting)

Lighting
switch

Combination
meter
M
B_$

Headlight
RH

Combination
meter

Door
lock
timer

MB-9
Luggage
room
light

Radio

Room
light

MB-10
A/C
relay
holder

ALT-1
Combination
meter

IG
A/C
relay
holder

Cruise
control
module

ST
Engine
control
module

Inhibitor
switch

FB-2
Diode
(A/C)

Sub
fan
motor
FB-3
Sub
fan
relay-2

Engine
control
module

Fuel
pump
relay
FB-4
Ignition
coil

Transmission
control
module

Side
marker
light
LH
FB-6
Side
marker
light
RH

FB-7Door
lock
timer

FB-9Hazard
switch

AT
shift
lock
control
module
FB-10
Key
warning
switch

Power
antenna

FB-11
Radio

FB-12
Cigarette
lighter

FB-13
Remote
control
rearview
mirrorswitch

AT
shift
lock
control
module

Combination
switch
Front
washer
motor
FB-14
Front
wipermotor

Rear
washer
motor

Rear
wipermotor

Rear
wiper
relay

FB-15Transmission
control
module

Na
Load

Rear
defogger

FB-16
Rear
defogger
condenser

Reardefogger
switch

FB-17
Rear
defogger
switch

FB-18
AT
shift
lock
control
module

Inhibitor
switch

FB-19
Hazard
switch

Combination
meter
FB-20
Mode
control
panel
FB-21
Combination
meter
(Airbag)

Blower
motor
relay

Check
connector

FB-22
FRESH/RECIRC
actuator

Mode
actuator

Powerwindow
relay

Seat
belt
timer

FB-23
Airbag
.
control
module

FB-24
Airbag
control
module

FB-25
Lighting
switch

FB-26
Parking
switch

FB-27
Parking
switch

FB-28
Illumination
light

FB-29
Illumination
light

FB-30
Stop
light
switch

Stop
&
brake
switch

FB-31
Horn
relay

FB-32
Blower
motor
relay

FB-33
Parking
switch

License
plate
light
LH

License
plate
light
RH

FB-34
Rear
combination
light
LH

Rear
combination
light
RH

Rear
finisher
light
LH

Rear
finisher
light
RH

FB-35
Cruise
control
main
switch
Cruise
control
module

8
.
Electrical
Wiring
Harness
and
Ground
Point

Connector
Connecting
to

No
.
Pole
Color
Area
No
.
Name

R156
B-2
B97
Bulkhead
wiring
harness
(S
.M
.J
.)

R4
1
Black
B-2
Parking
brake
switch

R5
2B-2
Select
lever
illumination
light

R6
2
Black
B-2
Shift
lock
solenoid

R7
2B-2P
position
switch

RS
2B-2
Seat
belt
switch

R9
1
Brown
B-3Front
door
switch
LH

R11
8
B-4D21
Rear
doorcord
LH
R12
1
Brown
B-2
Front
door
switch
RH

R14
8
B-2
D27
Rear
door
cord
RH

R15
8B-3
R57
Fueltank
cord

R16
1
Brown
A-3
Rear
door
switch
RH

R30
2
Black
B-2
Diode
(Rear
gale
latch
switch)

R46
2
B3
R67
Fuel
lankcord

R50
2
Green
B-2
890
Bulkhead
wiring
harness

R52
2
A-3
Room
light

R57
S
B-3
R15
Rear
wiring
harness

R58
6
A-3
Fuel
gaugemodule
&
fuel
pump

R59
2
B-4
Fuel
gauge
submodule
R67
2
B-3
R46
Rear
wiring
harness

R68
2B-3
Pressure
control
solenoid
valve

R69
I
2
A-3
Vent
control
solenoid
valve

non-coiorea

A

B

C
n

6
.
REAR
WIRING
HARNESS
AND
GROUND
POINT

1
I
2
I
3
I
4
2
~S
4
[D806]

B6M0695A

A

B

C

u

8
.
Electrical
Wiring
Harness
and
Ground
Point

Connector
Connecting
to

No
.
Pole
Color
Area
No
.
Name

R156
B-2
B97
Bulkhead
wiring
harness
(S
.M
.J
.)

R4
1
Black
B-2
Parking
brake
switch

R5
2B-2
Select
lever
illumination
light

R6
2
Black
B-2
Shift
lock
solenoid

R7
2B-2P
position
switch

RS
2B-2
Seat
belt
switch

R9
1
Brown
B-3Front
door
switch
LH

R11
8
B-4D21
Rear
doorcord
LH
R12
1
Brown
B-2
Front
door
switch
RH

R14
8
B-2
D27
Rear
door
cord
RH

R15
8B-3
R57
Fueltank
cord

R16
1
Brown
A-3
Rear
door
switch
RH

R30
2
Black
B-2
Diode
(Rear
gale
latch
switch)

R46
2
B3
R67
Fuel
lankcord

R50
2
Green
B-2
890
Bulkhead
wiring
harness

R52
2
A-3
Room
light

R57
S
B-3
R15
Rear
wiring
harness

R58
6
A-3
Fuel
gaugemodule
&
fuel
pump

R59
2
B-4
Fuel
gauge
submodule
R67
2
B-3
R46
Rear
wiring
harness

R68
2B-3
Pressure
control
solenoid
valve

R69
I
2
A-3
Vent
control
solenoid
valve

non-coiorea

A

B

C
n

6
.
REAR
WIRING
HARNESS
AND
GROUND
POINT

1
I
2
I
3
I
4
2
~S
4
[D806]

B6M0695A

A

B

C

u

1. Clutch System
Condition Possible cause and testing Corrective action
1. Clutch slip-
pageIt is hard to perceive clutch slippage in the early stage, but pay attention to the following symptoms.
(a) Engine revs up when shifting.
(b) High speed driving is impossible; especially rapid acceleration impossible and vehicle speed does not increase in
proportion to an increase in engine speed.
(c) Power falls, particularly when ascending a slope, and there is a smell of burning of the clutch facing.
Method of testing: Put the vehicle in stationary condition with parking brake fully applied. Disengage the clutch and
shift the transmission gear into the first. Gradually allow the clutch to engage while gradually increasing the engine
speed. The clutch function is satisfactory if the engine stalls. However, the clutch is slipping if the vehicle does not
start off and the engine does not stall.
(a) No clutch pedal play Readjust.
(b) No release lever end play Readjust.
(c) Clutch facing smeared by oil Replace.
(d) Worn clutch facing Replace.
(e) Deteriorated diaphragm spring Replace.
(f ) Distorted pressure plate or flywheel Correct or replace.
(g) Defective release bearing holder Correct or replace.
(h) Defective pedal and cable system Correct or replace.
2. Clutch
drags.As a symptom of this trouble, a harsh scratching noise develops and control becomes quite difficult when shifting
gears. The symptom becomes more apparent when shifting into the first gear. However, because much trouble of the
this sort is due to defective synchronization mechanism, carry out the test as described after.
Method of testing: Refer to DIAGNOSTIC DIAGRAM on page after.
It may be judged as insufficient disengagement of clutch if any noise occurs during this test.
(a) Excessive clutch pedal play Readjust.
(b) Excessive clutch release lever play Readjust.
(c) Worn or rusty clutch disc hub spline Replace clutch disc.
(d) Excessive deflection of clutch disc facing Correct or replace.
(e) Seized crankshaft pilot needle bearing Replace.
(f ) Malfunction of pedal and cable system Correct or replace.
(g) Cracked clutch disc facing Replace.
(h) Sticked clutch disc (smeared by oil or water) Replace.
3. Clutch chat-
ters.Clutch chattering is an unpleasant vibration to the whole body when the vehicle is just started with clutch partially
engaged.
(a) Improper clutch cable routing Correct.
(b) Adhesion of oil on the facing Replace clutch disc.
(c) Weak or broken torsion spring Replace clutch disc.
(d) Defective facing contact or excessive disc Replace clutch disc defection.
(e) Warped pressure plate or flywheel Correct or replace.
(f ) Loose disc rivets Replace clutch disc.
(g) Loose engine mounting Retighten or replace mounting.
(h) Improper adjustment of pitching stopper Adjustment.
11
2-10DIAGNOSTICS
1. Clutch System

3. Performance Test
A: STALL TEST
1. GENERAL
The stall test is of extreme importance in diagnosing the
condition of the automatic transmission and the engine. It
should be conducted to measure the engine stall speeds in
all shift ranges except the P and N ranges.
Purposes of the stall test:
1) To check the operation of the automatic transmission
clutch.
2) To check the operation of the torque converter clutch.
3) To check engine performance.
2. TEST METHODS
Preparations before test:


1Check that throttle valve opens fully.


2Check that engine oil level is correct.


3Check that coolant level is correct.


4Check that ATF level is correct.


5Check that differential gear oil level is correct.


6Increase ATF temperature to 50 to 80°C (122 to 176°F)
by idling the engine for approximately 30 minutes (with
select lever set to“N”or“P”).
1) Install an engine tachometer at a location visible from
the driver’s compartment and mark the stall speed range
on the tachometer scale.
2) Place the wheel chocks at the front and rear of all
wheels and engage the parking brake.
3) Move the manual linkage to ensure it operates properly,
and shift the select lever to the 2 range.
B3M0286B
4) While forcibly depressing the foot brake pedal, gradu-
ally depress the accelerator pedal until the engine operates
at full throttle.
5) When the engine speed is stabilized, read that speed
quickly and release the accelerator pedal.
6) Shift the select lever to Neutral, and cool down the
engine by idling it for more than one minute.
7) Record the stall speed.
8) If stall speed in 2 range is higher than specifications,
forward clutch slipping on brake band slipping may occur.
To identify it, conduct the same test as above in D range.
9) Perform the stall tests with the select lever in the R
range.
CAUTION:
Do not continue the stall test for MORE THAN FIVE
SECONDS at a time (from closed throttle, fully open
throttle to stall speed reading). Failure to follow this
instruction causes the engine oil and ATF to deterio-
rate and the clutch and brake band to be adversely
affected.
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3-2SERVICE PROCEDURE
3. Performance Test

B: TIME LAG TEST
1. GENERAL
If the shift lever is shifted while the engine is idling, there
will be a certain time elapse or lag before the shock can be
felt. This is used for checking the condition of the forward
clutch, reverse clutch, low & reverse brake, forward one-
way clutch and low one-way clutch.
CAUTION:
Perform the test at normal operation fluid tempera-
ture 60 to 80°C (140 to 176°F).
Be sure to allow a one minute interval between tests.
Make three measurements and take the average
value.
2. TEST METHODS
1) Fully apply the parking brake.
2) Start the engine.
Check idling speed (A/C OFF).
“N”range: 800±100 rpm
3) Shift the shift lever from“N”to“D”range.
Using a stop watch, measure the time it takes from shift-
ing the lever until the shock is felt.
Time lag: Less than 1.2 seconds
4) In same manner, measure the time lag for“N”,“R”.
Time lag: Less than 1.5 seconds
3. EVALUATION
1) If“N”,“D”time lag is longer than specified:
Line pressure too low
Forward clutch worn
Low one-way clutch not operating properly
2) If“N”,“R”time lag is longer than specified:
Line pressure too low
Reverse clutch worn
Low & reverse brake worn
Forward one-way clutch not operating properly
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3-2SERVICE PROCEDURE
3. Performance Test

C: LINE PRESSURE TEST
1. GENERAL
If the clutch or the brake band shows a sign of slippage or
shifting sensation is not correct, the line pressure should be
checked.
Excessive shocks during upshifting or shifting takes
place at a higher point than under normal circumstances,
may be due to the line pressure being too high.
Slippage or inability to operate the vehicle may, in most
cases, be due to loss of oil pressure for the operation of
the clutch, brake band or control valve.
G3M0869
1) Line pressure measurement (under no load)
CAUTION:
Before measuring line pressure, jack-up front
wheels (front-wheel-drive model) or all wheels (4-wheel
drive model).
Maintain temperature of ATF at approximately 50°C
(122°F) during measurement.
(ATF will reach the above temperature after idling the
engine for approximately 30 minutes with select lever
in“N”or“P”.)
G3M0869
2) Line pressure measurement (under heavy load)
CAUTION:
Before measuring line pressure, apply both foot and
parking brakes with all wheels chocked (Same as for
“stall”test conditions).
Measure line pressure when select lever is in“R”,
“2”with engine under stall conditions.
Measure line pressure within 5 seconds after shift-
ing the select lever to each position. (If line pressure
needs to be measured again, allow the engine to idle
and then stop. Wait for at least one minute before mea-
surement.)
Maintain the temperature of ATF at approximately
50°C (122°F) during measurement. (ATF will reach the
above temperature after idling the engine for approxi-
mately 30 minutes with the select lever in“N”or“P”.)
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3-2SERVICE PROCEDURE
3. Performance Test