Table of Contents
Advertisement
Note
Vacuum
hose
position
R R
side of Nissan
mark
on
the
top
of
sensor
for
intake manifold
L R
side of
the
mark
is
for
vacuum
rootor
2 2
Vacuum
motor
I
With
engine
stopped
disconnect
fresh
air
duct
Place
a
mirror
at
the
end of
air
cleaner inlet
pipe
as
shown and check
to
see
if
air
control valve
is in correct
position
EF213
Fig
ET
27
Impecting
lJalv
position
Air control valve
is in correct
posi
tion
if
its
under hood
air inlet is open
and
hot air
inlet
is
closed
Check
air
control
valve
linkage
for condition
2
Disconnect
vacuum
motor
inlet
vacuum
hose
and
connect
another
hose
to
the inlet
to
apply
vacuum to
vacuum
motor
Vacuum
can
be ap
plied
by breathing
in
the hose end
as
shown
Place
a
mirror
at
the
end of
air
cleaner inlet
pipe
and check
to
see
if
air
control valve
is in correct
position
Engine
Tune up
EF217
Fig
ET 28
lmpecting
value
position
Correct
pC6ition
of
air
control valve
is the
reverse
of
paragraph
I above Air
control valve
is in
correct
position
if
under hood
air
inlet
is
closed and hot
air
inlet
is open
3
With
hot
air inlet is
open
posi
tion
as
descnbed
in
paragraph
2
above
pinch
vacuum
hose with
fingers
and
cut
of
air
from
vacuum
hose
In
this condition check that
air
control
valve
maintains
the
condition
de
scribed
in
step
2
for
more
than 30
seconds and that hot
air
inlet
is
open
If
diaphragm
spring
actuates
the air
control
valve
by
its
spring
force
to
open
under hood
air
inlet within 30
seconds
replace
vacuum
motor
as
an
assembly
since
this
may
be resulted
from air
leak
at
vacuum
motor
dia
phragm
2
3
Temperature
sensor
Check
temperature
sensor
for func
tion
by proceeding
as
follows
Be
sure
to
keep engine
cold before
starting
test
1
With
engine
off check
air
control
valve for condition In this
case
under
hood
air
inlet
is open
Use
a
mirror
for
inspection
as
2
2 1
above
2
Start
engine
and
keep
idling
Immediately
after
engine starting
check
air
control
valve
for
correct
position
as
described
above
In
this
case
correct
position
of
air
control
valve
is
the
reverse
of 2 2
1
under
hood
air
inlet
is
closed
and hot air
inlet
is
open
ET
16
3
Check
that air
control valve
grad
ually
opens
to
under hood
air
inlet
side
as
engine
warms
up
When
en
vironmental temperature around
tern
perature
sensor
is
low
spend
more
time
for
engine warming
up
operation
to
facilitate smooth opera
tion
of
air
con
trol valve
If the
above test
reveals
any
prob
lem
in
the
operation
of
air
control
valve
carry out
the
following
test
4
Remove
air
cleaner
cover
Set
temperature sensing
element
of
ther
mistor
or
thermometer to
a
position
where tempera
ture
around
sensor can
be measured In this
case
fix
wiring
of
thermistor
or
thermometer
on
the
bot
tom
surface of
air
cleaner with adhe
sive
tape
in
such
a manner
that
the
set
position
of
temperature sensing
ele
ment
will
not
be affected
by
airflow
Then install
air
cleaner
cover
EF221
Fig
ET 29
Checking
t e mper o t u r
e
ensor
5
Carry
out
test
as
described
in
steps
I
2
and 3 above
When
air
control valve
begins
to open to
under
hood
air
inlet side
severa
minutes
after
engine starting
read the indica
tion of thermistor
or
thermometer
If
reading
falls within the
working
tern
perature
range
of
temperature
sensor
the
sensor
is
normaL If
reading
ex
ceeds the
range
replace
the
sensor
with
new one
Note
Before
replacing
temperature
sensor
check idle
compensator
as
described
in
Section EF
page
EF 8
Advertisement
Table of Contents
