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3
If there is
a
leak
remove
top
cover
from
purge
contiol valve and
check
for dislocated
or
cmcked dia
phragm
If
necessary
replace
dia
phmgm
kit
which
is
made up
of
a
retainer
diaphragm
and
spring
I
@
1
Cover
2
Diaphragm
3
Retainer
4
Diaphragm spring
Fig
ET 47
ET350
Carbon caniater purge
control valve
Carbon unlster filter
Check for
a
contaminated
element
Element
can
be
removed
at
the
bottom of
canister
installed
on
vehicle
body
Fig
ET 48
Replacing
carbon
canister
filter
Fuel tank
vacuum
relief
valve
operation
Remove fuel filler
cap
and
see
it
functions
properly
I
Wipe
clean valve
housing
and
have
it in your mouth
2
Inhale
air
A
slight
resistance
ac
companied by
valve
indicates
that
valve
is in
good
mechanical condition
Note also that
by
further
inhaling
air
the
resistance
should
be
disappeared
with valve clicks
Engine
Tune up
3
If
valve is
clogged
or
if
no
resist
ance
is
felt
replace
cap
as an assem
bled
unit
r
ET369
Fig
ET
49
Fuel
filler
cap
CHECKING
CATALYTIC
CONVERTER
INSPECTION
Preliminary inspection
Visually
check
condition
of all
component
parts
including
hoses
tubes
and
wires
replace
if
necessary
Refer
to
Inspection
of
A I
S
on
page EC 17
Catalytic
converter
Whether
catalytic
converter is
nOf
mal
or
not
can
be checked
by
ob
serving
variation
in
CO
percentage
The
checking procedure
is
as
follows
Apply parking
brake
Shift
gears
into
Neutral for manual
transmission
and Neutral
or
Park
for
automatic
transmission
1
Visually
check
catalytic
converter
for
damage
or
cracks
2
Remove
air
hose between 5
way
connector
and
air
check valve
Plug
the
disconnected
hose
to
prevent
dust
from
entering
Refer
to
page ET 12
3
Check carburetor
pipes
for
proper
connection
4
Warm
up
engine sufficiently
5
Race
engine
1
500
to
2 000
rpm
two
or
three
times
under
no
load then
run
engine
for
one
minute at
idling
speed
6
Adjust
throttle
adjusting
screw
until
engine
attains to
specified speed
Refer
to
page ET 12
7
Check
ignition timing
If
neces
sary
adjust
it to
specifications
Refer
to
page ET 10
ET 23
8
Adjust
idle
adjusting
screw
until
specified
CO
percentage
is
obtained
Refer
to page
ET 12
9
Repeat
the
adjustment
process
as
described
in
steps
5 to
8 above
until
specified
CO
percentage
is
obtained
Note
Adjustment
in
step
9 should be
made
ten
minutes after
engine
has
warmed
up
10
Race
engine
1
500
to
2 000
rpm
two
or
three
times under
no
load
and make
sure
that
specified
CO
per
centage
is
obtained
I 1
Remove
cap
and
connect
air
hose
to air
check valve
If
idling
speed
increases
readjust
it
to
specified
speed
with
throttle ad
justing
screw
12
Warm up
engine
for about four
minutes
at 2
000 rpm under
n
load
13
Measure
CO
percentage
at
idling
speed
After
step
12 has been
com
pleted
wait
for
one
minute
before
making
CO
percentage
measurement
14
If CO
percentage measured
in
step
13 is
less
than
0
3
the
catalylic
converter is
normal
15
If CO
percentage
measured
in
step
13
is
over
0
3
recheck
A I S
and
replace
air
check
valve
Then
perform
inspection
steps
12
and
13
16
If CO
percentage
is
still
over
0
3
in
step 15
catalytic
converter is
malfunctioning Replace catalytic
con
verter
CHECKING
FLOOR
TEMPERATURE
WARNING SYSTEM
INSPECTION
Floor
warning temperature
system
Apply
parldng
brake
Shift gears
into Neutral
for manual transmission
and Neutral
or
Park
for
automatic
transmission
1
Ensure
that
floor
tern
perature
warning
lamp lights
when
ignition
switch
is
turned
to
the
S
position
If
not
check
lamp
for burned
bul bs
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