JUDGEMENT
IN
MEASURING
LINE
PRESSURE
Low
idling
line
pressure
in
the
ranges
D
2
R
and
P
This
can
be
attributed
to
trouble
in
the
pressure
supply
system
or
too
low
output
of
power
caused
by
I
A
worn
oil
pump
2
An
oil
pressure
leak
in
the
oil
pump
valve
body
or
case
3
A
sticking
regulator
valve
2
Low
idling
line
pressure
i
n
cer
tain
ranges
only
This
is
presumably
caused
by
an
oil
leak
in
the
devices
or
circuits
con
nected
to
the
relevant
ranges
I
When
there
is
an
oil
leaJi
in
the
rear
clutch
and
governor
the
line
pressure
in
on
2
and
I
are
low
but
the
pressure
i
nonnal
in
R
2
When
an
oil
leak
occurs
in
the
low
and
reverse
brake
circuit
the
line
pressure
in
oR
and
P
are
low
b
t
the
pressure
is
normal
in
0
2
and
I
3
High
idling
line
pressure
Thi
is
presumably
caused
by
an
increased
aC
1ulT
t
rott
e
pr
ssure
owing
to
a
leak
in
the
vacuum
tube
or
diaphragin
or
by
an
increased
line
Automatic
Transmission
pressure
due
to
a
sticking
regulator
valve
Vacuum
leakage
is
checked
by
directly
measuring
the
negative
pres
sure
after
removing
the
vacuum
pipe
A
puncture
of
the
vacuum
dia
phragm
can
be
easily
ascertained
because
the
torque
converter
oil
is
absorbed
into
the
engine
and
the
exhaust
pipe
emits
white
smoke
4
Item
to
be
checked
when
the
Ii
e
pressure
is
increasing
In
this
c
1eck
the
line
pressure
should
be
measured
with
vacuums
of
300
mmHg
Il
SI
inHg
and
0
mmHg
0
inHg
in
accordance
with
the
staIl
test
procedure
i
If
the
line
pressure
does
not
in
crease
despite
the
vacuum
decrease
check
whether
the
vacuum
rod
is
i
corporated
2
If
the
line
pressure
does
not
meet
tile
standard
iUs
caused
mostly
by
a
sticking
pressure
regulating
valve
pres
sure
regulating
valve
plug
or
amplifier
TROUBLE
SHOOTING
CHART
INSPECTING
ITEMS
I
Inspection
with
automatic
trans
mission
on
vehicle
AT
45
A
Oil
level
B
Range
select
linkage
C
Inhibitor
switch
and
wiring
D
Vacuum
diaphragm
and
piping
E
Downshift
solenoid
kickdown
switch
and
wiring
F
Engine
idling
rpm
G
Oil
pressure
throttle
H
Engine
stall
rpm
I
Rear
lubrication
J
Control
valve
manual
K
Governor
valve
L
Band
servo
M
Transmission
air
check
N
Oil
quality
o
Ignition
switch
and
starter
motor
P
Engine
adjustment
and
brake
in
spection
2
Inspection
after
inspecting
auto
matic
transmission
on
vehicle
m
Rear
clutch
n
Front
clutch
q
Band
brake
r
Low
and
reverse
brake
s
Oil
pump
t
Leakage
of
oil
passage
u
One
way
clutch
of
troque
converter
v
One
way
clutch
of
transmission
w
Front
clutch
check
ball
x
Parking
linkage
y
Planetary
gear
