124
TK 61552-2-MM-EN
C
CA
AU
UT
TIIO
ON
N
R
Riisskk o
off IIn
njju
urry
y!!
IIff tth
he
e E
ET
TV
V iiss ssttu
ucckk iin
n tth
he
e ccllo
osse
ed
d p
po
ossiittiio
on
n,, m
mu
ucch
h o
off tth
he
e rre
effrriig
ge
erra
an
ntt cch
ha
arrg
ge
e m
ma
ay
y b
be
e ttrra
ap
pp
pe
ed
d
iin
n tth
he
e e
ev
va
ap
po
orra
atto
orr a
an
nd
d a
accccu
um
mu
ulla
atto
orr.. IIff y
yo
ou
u h
he
ea
arr rre
effrriig
ge
erra
an
ntt b
be
eg
giin
n tto
o ffllo
ow
w tth
hrro
ou
ug
gh
h tth
he
e v
va
allv
ve
e
w
wh
he
en
n tth
he
e sstte
ep
pp
pe
err m
mo
otto
orr a
an
nd
d p
piisstto
on
n a
asssse
em
mb
blly
y a
arre
e llo
oo
osse
en
ne
ed
d,, u
un
nssccrre
ew
w tth
he
e ffo
ou
urr ssccrre
ew
wss o
on
n
tth
he
e sstte
ep
pp
pe
err m
mo
otto
orr n
no
o m
mo
orre
e tth
ha
an
n ffo
ou
urr ttu
urrn
nss e
ea
acch
h a
an
nd
d cch
he
ecckk tth
he
e ssu
uccttiio
on
n ((llo
ow
w ssiid
de
e)) p
prre
essssu
urre
e
o
on
n tth
he
e g
ga
au
ug
ge
e m
ma
an
niiffo
olld
d.. IIff tth
he
e ssu
uccttiio
on
n p
prre
essssu
urre
e h
ha
ass iin
nccrre
ea
asse
ed
d ffrro
om
m tth
he
e p
prre
essssu
urre
e tto
o w
wh
hiicch
h
iitt w
wa
ass e
eq
qu
ua
alliizze
ed
d a
afftte
err tth
he
e llo
ow
w ssiid
de
e p
pu
um
mp
p d
do
ow
wn
n,, rre
effrriig
ge
erra
an
ntt iiss ttrra
ap
pp
pe
ed
d a
an
nd
d m
mu
usstt b
be
e
rre
ecco
ov
ve
erre
ed
d.. S
Sccrre
ew
w tth
he
e sstte
ep
pp
pe
err m
mo
otto
orr a
an
nd
d p
piisstto
on
n a
asssse
em
mb
blly
y b
ba
acckk iin
ntto
o tth
he
e v
va
allv
ve
e b
bo
od
dy
y.. A
Atttta
acch
h
a
a rre
effrriig
ge
erra
an
ntt rre
ecco
ov
ve
erry
y d
de
ev
viicce
e tto
o tth
he
e sse
errv
viicce
e p
po
orrtt o
on
n tth
he
e rre
ecce
eiiv
ve
err tta
an
nkk o
ou
uttlle
ett v
va
allv
ve
e.. M
Miid
dsse
ea
att
tth
he
e rre
ecce
eiiv
ve
err tta
an
nkk o
ou
uttlle
ett v
va
allv
ve
e,, a
an
nd
d rre
ecco
ov
ve
err tth
he
e rre
effrriig
ge
erra
an
ntt cch
ha
arrg
ge
e.. T
Th
he
e sstte
ep
pp
pe
err m
mo
otto
orr a
an
nd
d
p
piisstto
on
n a
asssse
em
mb
blly
y m
ma
ay
y tth
he
en
n b
be
e rre
em
mo
ov
ve
ed
d..
3. Remove the four screws that attach the stepper motor to the valve body.
Figure 95.
Removing Stepper Motor
1.
Remove Four Screws
4. If the complete ETV assembly is being replaced, unsolder and remove the valve body. It may
be necessary to unsolder the tubes above or below the valve body to obtain enough
clearance to remove the valve body. Note the position of the valve body so the new one will
be placed in the same position. The new ETV could interfere with other components if it is not
placed in the same position as the old one.
Installation of Service Kit
N
No
otte
e:: Do not connect the main/unified wire harness to the ETV and turn the unit on before the
stepper motor and piston assembly is installed in the valve body. The controller is
programmed to close the ETV when the unit is turned on. If the unit is turned on with the
ETV connected to main wire harness, the controller will attempt to close the ETV. This will
cause the piston to be turned (screwed) off the threaded shaft of the stepper motor
because the valve body is not present to stop it.
1. The new stepper motor and piston assembly is supplied with the piston in the open position.
In the open position the bottom edge of the piston is 8 to 18 mm (0.3 to 0.7 in.) from the
bottom edge of the piston housing. The piston retracts to open and extends to close.
