DATSUN 210 1979 Service Manual

shoWn
in

Fig
AC
I
I

When

valve
stem
is

fully
screwed

the
valve
is

front
seated
and
valve

path

Low

pressure

gauge

Compound
pressure
gauge
Air

Conditioning

and
the
tenter

path
are
blocked
When

valve

stem
is
backed
off
the

paths
are

opened

High
pressure
gauge

Back
seated

Full
counter

clockwise

I

VA

l

C
f

f
f
J

l
r

To
low
side
To
vacuum

pump
01

To

high
side

service
valve

refrigerant
can
service
valve

Fig
AC
II
Manifold

Gauge

ConnectIon
to

service
valve

I

Fully
close
both
valves
of

mani

fold

gauge
Connect

high
and

low

pressure
charging
hoses
to
manifold

gauge

2
Remove

caps
from
service
valves

Connect
high
and

low

pressure
charg

ing
hoses
to
service
valves
in

system

The

refrigerant
gas
will
be

discharged

since
check
valve
is

open
when

pressing
charging
hose

onto
service

valve

3

Next
loosen
the
connection
fit

ting
of

charging
hose
at
manifold

gauge
side
for
2
to
3
seconds
to

purge

any
air
inside

charging
hose

by
the

pressurized
gas
in

system

DIsconnection
from

servIce
val
ve

I

Fully
close
both
valves
of
mani

fold

gauge

2
Disconnect

two

charging
hoses

from
service
valves
At

this
time

the

gas
will

be

discharged
until
check
valve

is

closed
Therefore
disconnect
hose

quickly

WARNING

Work
with

fingers

protecte
with

cloth

against
frostbite

by
reo

frigerant
FronHeated

Fun

clockwise

r

AC243

HANDLING
SERVICE
VALVE

An
automatic

check
valve
is

built

into
service

valve
When
this
valve

presses
against
the
connection

fiUing

that
is

when

charging
hose

is
con

nected
to
service

valve
the
valve
is

open
When

charging
hose
is

discon

nected
the
valve
is
closed
auto

matically
Always
observe
the
follow

ing

usage
precautions

1ts

Close

I

Cap

2
Service
valve

3

Charging
hose
ir

Open

4

Packing

5
Check
valve

AC244

Fig
AC
12
Service
Valve

I

Always
install
valve

cap
after

using
service
valve

When

high

speed
operation
is

per

AC
I0
formed
without
valve

cap
a

negative

pressure
will

gradually
build

up
at

the

low

pressure
side
of

system
and
air

may
be
sucked
in
In
addition
dirt

and

dust
will

easily
enter
the
valv
result

ing
in

foreign
matter

entering
the

system

CAUTION

00
not
over

tighten
valve

cap

2
Check
valve
wiJI
be
half

opened

during
connection
and

disconnection

of

charging
hoses
and

refrigerant
will

be

forcefully
discharged
Therefore

connect
and
disconnect

charging
hoses

quickly
while

pressing
flare
nut
of

charging
hose

against
service

valve

WARNING

Work
with

fingers
protected
with

cloth

against
frostbite

by
reo

frigerant

3

Since
close
contact
between
the

thread
of
valve

cap
and
the
thread
of

service

valve
will

prevent
gas
leakage

keep
these
areas
clean
and

free
of

scratches
and

damage

4

Since

packing
of

charging
hose

will
be
lost

during
long
use

always

check

packing
prior
to

installing
charg

ing
hose

HANDLING
CAN
TAP

A

wide

variety
of
can

taps
are

available
The

following
procedures

apply
to

conventional
can

taps

For

the
correct

usage
refet
to

the

manufacturer

s
instructions

I

Connect

charging
hose
to
the

center

fitting
of
manifold

gauge
At

this
time
confirm
that

both
stems
are

fully
turned
in

frontoSeated

2
Turn

can

tap
handle

fully
coun

terlockwise
so
that
the
needle
is

pulled
up

3

Attach
can

tap
to

refrigerant
can

firmly

4

Turn
can

tap
handle

fully
clock

wise

to
make
a

hole
in

refrigerant

can
See

Fig
AC
13

5
Turn

the
handle

fully
counter

clockwise
to
raise
the
needle

Refriger

ant

gas
will
flow

up
to
the
center

fitting
of
manifold

gauge
See

Fig
AC

14

Air

Conditioning

6
Loosen
the
connection

at
the

center

fitting
of

manifold

gauge
for
a

Clockwise
few
seconds
to

purge
air
inside

charg

ing
hose
See

Fig
AC
14

Counterclockwise

j

3

@

I

Can
tap
handle

2

ChlcginS
hose

3
Needle

4

Refrigerant
can

AC246

Fig
AC
13
Can

Top

Purging
air

R

12

To

L9w
pressure

service
valve
AC247

Fig
AC
14

Purging
Air

Ta

High
pressure

service
valve

f

r

AC181A

Fig
AC
15

Discharging
System

AC
ll
DISCHARGING
SYSTEM

The

pressurized
refrigerant

gas
in

side

system
must
be

discharged
to
a

pressure
approaching
atmospheric

pressure
prior
to

evacuating
refrigerant

inside

system
This

operation
should

be
also
made
to

pennit
safe
removal

when

replacing

system
components

A
Close

high
and
low

pressure

valves

of
manifold

gauge
fully

2

Connect
two

charging
hoses
of

manifold

gauge
to

their

respective

service
valves

WARNING

Securely
connect

high
pressure
dis

charge
service
valve
to
that
of

manifold

gauge
with
a
hose
also

connect
low

pressure
suction
serv

ice
valve
to
that
of
manifold

gauge

For

locations
of

high
and
low

pres

sure

discharge
and
suction
service

valves
see

Fig
AC
29

3

Open
both
manifold

gauge
valves

slightly
and

slowly
discharge
refriger

ant
from

system
See

Fig
AC
15

WARNING

Protect

fingers
with
cloth

against

frostbite

by
refrigerant
when
con

necting
the

charging
hose

to
the

service

valve
or

disconnecting
it

therefrom

Nole
Do

not
allow

refrigerant
to
rush

out
Otherwise

compressor
oil
will

be

discharged
along
with

refriger

ant

EVACUATING

SYSTEM

I

Connect

high
and
low

pressure

charging
hoses
of
manifold

gauge
to

their

respective
service
valves

of

sys

tem
and

discharge
refrigerant
from

system
Refer
to

Discharging
System

WARNING

Securely
connect

high
pressure
dis

charge
service
valve
to
that
of

manifold

gauge
with
a
hose
also

connect
low

pressure
suction

servo

ice

valve
to
that
of
manifold

gauge

For

locations
of

high
and

low

pres

sure

discharge
and
wction
service

valves

see

Fig
AC
29

Air

COl
ditioning

2

When

refrigerant
has
been

dis

charged
to
a

pressure
approaching
at

mospheric

pressure
connect
center

charging
hose
to
a

vacuum

pump

3
Close
both
valves
of
manifold

gauge
fully
Then
start
vacuum

pump

4

Open
low

pressure
valve
and

suck
old

refrigerant
ftom

system
See

Fig
AC
16

5
When
low

pressure
gauge
reading

has

reached
to

approximately
500

nunHg
20

inHg
slowly

open
high

pressure
valve

First

step

To
Low

pressure

service
valve
To

High
pressure

service
valve

rtl

Second

step

To

Low

pressure

service
valve
To

High
pressure

service
valve

f

AC182A

Fig
AC
16

Evacuating
System
First

and
Second

Steps

AC

12
6
When

pressure
insill

system
h
as

dropped
to
710

mmHg
28

inHg

fully
close
both

of
valves
of

manifold

gauge
and

stop
vacuum

pump
Let

stand

it
for
5
to
10
minutes
in

this

state
and

confirm
that

the

reading

does
not

rise

Note

a
The
low

pressure

gauge
reads
lower

by
25

mmHg
I

inHg
per
a

300
m

1

000
ft

elevation
Perfonn

evacu

alion

according
to
the

following

table

Elevation

m
ft

0
0

300

1
000

600
2
000

900
3
000
Vacuum
of

system

nunHg
inHg

710
28

685
27

660
26

635
25

Note

Values
show

reading
of
the

low
pressure
gauge

b
The
rate
of
ascension
of
the
low

pressure
gauge
should
be
less
than

25

mmHg
I

inHg
in
five

min

utes

If
the

pressure
rises
or
the

specified

negative

pressure
can

not
be
obtained

lhere
is
a

leak
in

the

system
In

this

case

immediately
charge
system
with

refrigerant
and

repair
the
leak

de

scribed
in

the

following

J
Charge
system
with
a
can
of

refrigerant
about
0
4

kg
0
9Ib
Re

fer
to

Charging
Refrigerant

2
Check
for

refrigerant

leakige

with
a
leak
detector

Repair
any
leak

ages
found
Refer
to

Checking
for

Leaks

3

Discharge
refrigerant
again
and

then
evacuate

system

CHARGING
REFRIGERANT

I
Install
manifold

gauge
to

system

Refer
to

Handling
Manifold

Gauge

WARNING

Securely
connect

high
pressure
dis

charge
service
valve
to
that
of

manifold

gauge
with
a
hose
also

connect
low

pressure
suction
serv

ice
valve
to
that
of
manifold

gauge

For
locations
of

high
and
low

pres

sure

discharge
and
suction
service

valves

see

Fig
AC
29

CAUTION

a
Be
sure
to

purge
air
from
the

high

and
low

pressure
charging
hoses

b
If
air
is
mixed
with

refrigerant
gas

in

system
evacuation
of

system

should
be

performed
Refer
to

Evacuating
System

2
Attach

center

charging
hose

of

manifold

gauge
to

refrigerant
can

through
can

tap
Break
seal
of

refriger

ant
can
to

allow

refrigerant
to
enter

manifold

gauge
Loo

en

charging
hose

at
the
center

fitting
of
manifold

gauge

and

purge
air
from
inside

charging

hose
Refer
to

Handling
Can

Tap

3

Open
high
and
low

pressure

valves
of
manifold

gauge
and

charge

refrigerant
into

system
See

Fig

AC
17

Note
When

refrigerant
charging
speed

is

slow
immerse

refrigerant
can
in

water
heated

to
a

temperature
of

about
400C
1
040

F
for

a
short

time

See

Fig
AC
18

WARNING

a
Under

any
circumstances
the

re

frigerant
can
must
not
be
warm

ed
in

water
heated
to
a

temper

ature
of

over
520C
1260F

b

A
blow
toreh
or
stove
must

never
be
used

to
warm

up
the

can
Air

Conditioning

To
Low

pressure

service
valve

t

R
12
t

@
I
J
To

High
pressure

service
valve

t

t

AC183A

Fig
AC
17

Charging
Refrigerant

p
CAUTION

When

charging
liquefied
refrigerant

into
the

system
with
the
can
turned

upside
down
to
reduce

charging
time

charge
it

only
through
high
pressure

discharge
service
valve
but
not

through
low

pressure
suction
service

valve
See

Fig
AC
19
After

comple

tion
of

charging
the

compressor

should

always
be
turned
several
times

manually
lmmene
in
water

heated
to
about

400C
1040F

for
a

hort
time

AC184A

Fig
AC
18
Charging
Refrigerant

To
Low

pressure

service

valve
To

High
pressure

service
valve

t

r

J

AC
13
Low

t

AC185A

Fig
AC
19

Chorging
Liquefied
Refrigerant

4

Wfefrlgerant

charging
speed
slows

down

charge
it
while

running
the

compressor
for

ease
of

charging
After

having
taken

the

steps
up
to

3
above

proceed
with

charging
in
the

following

order

1
Shut

off

high
pressure
valve
of

manifold

gauge

2
Run

the

engine
at

idling

speeds

below
1

500

rpm

3
Set
the

Temperature
lever
and

Fan

switch
at
maximum
cool
and

maximum

speed
respectively

To

Lpw
pressure

service

valve

t
Air

Conditioning

4

Charge

efiigerani
while
con

trolling
low

pressure
gauge
reading
at

2
8

kg
cm2

40

psi
or

less

by
turning

in

or
out
low

pressure
valve
of
mani

fold

gauge
See

Fig
A

20

WARNING

Never

charge
refrigerant

through

high

pressure
side

discharge
side

of

system
since
this
will

force
re

frigerant
back
into

refrigerant
can

and
can

may
explode

To

High
pressure

service
valve

A

5
When

refrigerant
can
is

empty

fully
close
both
valves

of
manifold

gauge
and

replace

refrigerant
can
with

a
new

ot
e

Before

opening
manifold

gauge

valve
to

charge

refrigerant
from
new

can
be

sure
to

purge
air

from
inside

charging
hose

6

Charge
the

specified
amount
of

refrigerant
into

system
by
weighing

charged

refrigerant
with

scale
Over

charging
wiU

cause

discharge
pressure

to
rise
AC380A

Fig
AC
20
Charging
Refrigeront

Measure
the
amount

of

charged
refrigerant

with
a

scale

Make
a
note

of
the

amount

charged
from

can

AC252

Fig
AC
21

Chorging
Refrigeront

Refrigerant
capacity

Unit

kg
lb

Refrigerarit
Minimum

Maximum

R
12

0
8
1
8

1
0
2
2

AC14
Note
The

p
Ce
of
btibble
hi

sight
glass
of
receiver
drier
is

an

unsuitable

method
of

checking
the

amount
of

refrigerant

charged
in

system
The
state
of
the
bubbles

iJt

sight
glass
should

only
be
used
ior

checking
whether
the
amount
of

charged

refrigerant
is
small
or

not

The
amount
of

charged

refrigerani

can
be

correcdy

judged
by
means

of

discharge
pressure
Refer
to
Re

frigerant
Level
Check

7
After

the

specified
amount
of

refrigerant
has
been

charged
intosys

tern
close
manifold

gauge
valves
Then

detach

charging
hoses
from
service

valves
of

system
Be

sure
to
install

valve

cap
to
service

valve

8

Confirm
that

there
are
no
leaks
in

system
by
checking
with
a
leak
detec

tor

Refer

to

Checking
for

Leaks

Note

Conducting
8

performance
test

prior
to

removing
manifold

gauge
is

8

good
service

operation
Refer
to

Performance

Test

CHECKING
FOR

LEAKS

Conduct
a
leak
t
st
whenever
leak

age
of

refrigerant
is

suspected
and

when

conducting
service

operations

which
are

accompanied
by

disassembly

or

loosening
of
connection

fittings

Refrigerant
is

a
colorless
odorless

gas
and

leakage
from

system
is

diffi

cult
to
detect

Accordingly
the
use
of

a
leak
detector
facilitates
check
for

leaks
Two

methods
of

checking
are

available
one

employs
a

halide
leak

detector
which
bums

propane

gas
or

butane

gas
and
the
other
is

an
electric

type
leak

detector

If

any
trace
of
oil
is

noted
at
and

around
connection

fittings
it
is

a
sure

indication
that

refrigerant
is

leaking

This
condition
can
be
corrected

easily

by

retightening
the

joints
If

any

joint

on
line
is

suspected
of
small
amount
of

leakage
use
a
leak
detector
to
locate

leaking
points

HALIDE
LEAK
DETECTOR

Since
the

propane
leak
detector
and

butane
leak
detector
are
the
same
in

respect
to
their

operation
this
section

describes
the

operation
of
the

propane

leak
detector

The

copper
screen
is
heated

by
the
Air

Conditioning

burning
of

propane
Refrigerant
gas

decomposes
to
color
the

flame
when
it

contacts
the
heated

screen
The

gas
to

be
checked
is
drawn
into
the

sampling

tube
and

sent
out
to
the
burner
A

refrigerant
leak
can
clearly
be

detected

by
variations
in
the
color
of
the

flame

1

Copper
reaction

plate

2
Flame

adjusting
lines

3
Burner

4

Sampling
tube

5
Strainer

6
Gas
bomb

7

Flame

adjuster

AC010

Fig
AC
22
Checking
for
Leaks
4

The
flame
will
be

almost
colorless

when
there
is
no

refrigerant
gas
being

burned
When
there
is

a
small

refriger

ant

gas
leak
the
flame
will
be

green
or

yellowgreen
When

refrigerant
gas
leak

age
is

large
the
flame

will
be
brilliant

blue
or

purple
Since
the

color
of
the

flame
will
be

yellow
when
dust
is

being
burned

or
there
is

aging
scale
on

copper
reaction

plate
always
keep
the

strainer

of

sampling
tube
and
reaction

plate
clean

5

Major
check

points

l
Compressor

Compressor
shaft
seal

rotate
the

compressor
by
hand

Flexible
hose

connections

Front
and
rear

head

gaskets

Service
valve

2
Condenser

Condenser

pipe
fitting

Condenser
inlet
and

outlet

pipe

connections

3
Refrigerant
lines

Flared
section
of

high

pressure
and

low

pressure
flexible
hoses

Une

connections

4

Evaporator
housing

Inlet
and
outlet
line
connections

Expansion
valve

Propane
type
Butane

type

ELECTRIC
LEAK
DETECTOR

NO
LEAK

Greenish
blue
Pale

blue

For
the

operational
procedures

SMALL
LEAK
Yellow

Bright
blue
refer

to
the
instructions
furnished
with

LARGE
LEAK

Purple
Vivid

green
each
electric
leak
detector

Discharge
refrigerant
in
one
or

two
seconds

to
ascertain

that

system

has

a
sufficient

pressure
needed
for

leak
detection

Charge
with
0
4

kg
0
9

Ib
of

refrigeranl
if

necessary

2

Light
leak
detector

Adjust
the

height
of
the
flame
between

flame

adjusting
lines
at
the

top
and
bottom

of
combustion
tube

A
reaction

plate

will

immediately
become
red
hot

3
Place
the
end
of

sampling
tube

near
the

point
of
the

suspected
leak
in

system

Note

a
Since

refrigerant
gas
is

heavier
than

air
small
leaks

can
be

easily
detect

ed

by

placing
sampling
tube
direct

ly
below
the
check

point
b
Suitable
ventilation
is

required
If

refrigerant
gas
is

mixed
with
the

surrounding
air
leak
detector
will

always
indicate
a

response
and

detection
of
the
actual
leak
will
be

difficult

c
Never

hold
leak
detector
at
an

angle

WARNING

a
Never
inhale
the
fumes

produced

by
combustion

of

refrigerant
gas

since

they
are
toxic

b
Never
use
halide
torch
in
a

place

where
combustible
or

explosive

gas
is

present

AC
15
REFRIGERANT

LEVEL
CHECK

SIGHT

GLASS

Sight
glass
is

provided
at
the

top
of

receiver

drier
One

guide
for
whether

there
is

enough
refrigerant
in

syst
m
is

given
by
observing
refrigerant
flow

through
sight
glass
However
this

method
is
unsuitable
for

judging
the

aJTlount
of

refrigerant
The
correct

refrigeranl
level
can
be

judged
by

measuring
the

system
pressures
in

ac

cordance
with
the

procedures
as
de

scribed
in
Performance
Test

1

Start
the

engine
and
hold

engine

speed
al
1

500

rpm

2

Set
AIR
lever
to

AlC

position

I

I

3
Set

temperature
lever
to
max

imum

cold

position
Air

Conditioning

4

Sefblower
to
maximum

speed

S

Check

sight
glass
after

the

lapse

Almost
no

refrigerant

Check
item

Temperature
of

high
prenure

and
low

pressure
lines
Almost
no
difference

between

high
presswc

and

lowpressufC
side

temperature

State
in

sight
gl
ltS3
Bubbles
flow
continu

ously
Bubbles
will

disappear
and
some

thing
like

mist
wiD

flow
when

rerrigel
l
llt

is

nearly

gone

AC256

Pressure
of

system
High
pressure
side
is

abnormally
low

Repair
Stop
compressor
and

conduct
an

overall

check

Note

a
The
bubbles
seen

tbrough
the

sight

glass
are
influenced

by
the
ambient

tempemture
Since
the
bubbles
are

bard
to
show

up
in

comparatively

low

tempemtures
below
200C
680

F
it
is

possible
that
a

slightly

larger
amouot
of

refrigemot
would

be
filled
if

supplied
according
to

tbe

sight
glass
Be

sure
to
recheck

the
amount
when
it

exceedS
20
C

680F
In

higher
tempemture
tbe

bubbles
are

easy
to
show

up
Insufficient

High
pressure
side
is

warm
and

low

pressure

side
is

fairly
cokt

The
bubbles
are
seen

at
intervals
of
1
2

seconds

AC257

Both

pressures
on

high

and
low

pressure
sides

are

slightly
low

Check
for
gas

leakage

repair
as

required
re

plenish
and

chaxge

system

b
Wben
the
screen
in
tbe
receiver

drier
is

clogged
tbe
bubbles
wiD

appear
even
if
the
amount
of

refrig

erant
is

nonnaL
In
this
case
tbe

outlet
side

pipe
of
tbe
receiver
drier

becomes

considembly
cold

AC
16
of

abOut
five
rilintJtes

Jullgeaccording

to
the

following
table

Suitable
Too
much

refrigerant

High
pressure
side
is

hot
and
low

pressure

side

is
cold
High
pressure
side
is

abnormally
hot

Almost
transparent

Bubbles

may
appear

when

engine
speed
is

raised
and
lowered
No
bubbles
can
be
seen

No
clear
difference
exists
these
two

conditions

nl

AC258

Both

pre55ures
on

high

and
low

pressure
sides

are

normal
Both

pressures
on

high

and
low

pressure
sides

are

abnonnally
high

Discharge
refrigerant

from
service
valve
of

low

pressure
side

PERFORMANCE
TEST

Check
for
the
amount
of

refrigerant

in
the

system
can
be
made

by
meas

uring
pressure
on

discharge
side

The
correct
amount
of

refrigerant
is

in

the

system
if

pressure
on
the

discharge
side
i
within
the

specified

range
For
details
refer
to
Trouble

Diagnoses
and
Corrections
for

per

fannance
test

Overcharging
will
show

up
in

higher

presstJre
on

discharge
side

COMPRESSOR

OIL
LEVEL
CHECK

The
oil
used
to
lubricate

compres

sor
circulates
into

system
from
the
oil

sump
while

compressor
is

operating

Therefore
to

correctly
measure
com

pressor
oil
the
amount
of
oil

flowing

to

system
must
be
considered
If
a

considerable
amount
of

leakage
of

refrigerant
gas
happens
the

leakage
of

compressor
oil
is
also

considered

There
will
be
no

compressor
oil
leak

age
from
a

completely
sealed

system

When

system
operates
under

satisfying

condition
the

compressor
oil
level

check
is

unnecessary

When

checking
the
level
of
com

pressor
oil

or
when

replacing
any

component
part
of
the

system
use
the

following
service

procedure
This

facio

litates
to

return
oil
to

compressor

1

Operate
compressor
at

engine

idling
speed
I
OOO

rpm
or
below

with

controls
set
for

maximum

cooling

and

high
blower

speed
for
10
to
15

minutes
in
order

to
return
com

pressor

oil
to

compressor

2

Stop
the

engine
and

discharge

refrigerant
of

system
and
then

remove

compressor
from
the

car

3

Remove

compressor
filler

plug

Drain

compressor
oil
from

compres

sor
oil

sump
and
measure
the
amount

AC742

Fig
AC
23
Filler
Plug

4

Compressor
oil
is

satisfactory
if

the

following
amount
of
oil
remains
in

the

compressor

Residual
oil

140
to
220
cc

4
7

to
7
4
US
fl
oz

4
9
to
7
7

Imp
fl
oz
Air

Conditioning

5
Check
the

cleanliness
of
the

oil
If

the
oil
contains

chips
or
other

foreign

material
clean

oil

sump
with
new
oil

6
Discard
the
used
oil
and
fill
with

the
same

amount
of

new
oil
Add

oil
if

found
less

than
above
amount

If

compressor
is

inoperative
due

to

faulty
compressor
or

heavy
loss
of

refrigerant
remove

compressor
and

repair
as

necessary
Then

pour
oil

up

to

correct
level
and
install
on

engine

After
above

steps
have
been

com

pleted
recheck

oil
level
drain
oil

to

correct
level

if
level
is

excessively
high

CAUTION

a
The
oil
should
not
be
transfused

from
a
container
into
another
as

the
failure
will

possibly
cause

moisture
to
mix
with
the
oil

b
The
used
oil
should
not
be
returned

into

a
container

c
The
oil
should
not
be
used
if
its

state
of

preservation
is
not
clear

enough

PERFORMANCE
TEST

The

cooling

per
ormance
of
the

air

conditioner

changes
considerably
with

changes
in

surrounding
conditions

Testing
must
be

performed
using
the

correct
method
This
test
is
used
to

judge
whether

system
is

operating
cor

rectly
and

can
also
be
used

as
a

guiqe

in

checking
for

problems

1
Park
the

car
indoors
or
in
the

shade

2

Open
all
the
windows

of
the
car

fully
However
close
the
doors

3

Open
the
hood

4
Connect

manifold

gauge
to

high

and
low

side
service
valves
of
the

system
Refer
to

Handling
Manifold

Gauge

5

Set
air
lever
to

AIC

position

6
Set

temperature
lever
to
maxi

mum
cold

position

7

Set
blower
to
its

highest

speed

8
Start
the

engine
and
hold

engine

speed
at
1
500

rpm

9
After
the
air
conditioner
has
been

operated
for
about
10
minutes
meas

ure

system
pressures
at

high
pressure

discharge
side
and
low

pressure
suc

tion

side

10
Measure
the

temperature
of
dis

AC
17
charge
air
at
the

center
outlet

grille

11
Measure

the

temperature
and

humidity
of
the

evaporator
in
take
air

at

the

recirculating
air
inlet

of
the

evaporator

12
Measure
the

temperature
and

humidity
of
the
ambient
air
at
a

point

I
m
3
3
ft

front
of

condenser

However
a

dry
bulb

and
wet
bulb

must
not
be

placed
in

direct
sunlight

13

Check
for

any
abnormalities
by

comparing
the
test
results

with
stand

ard

pressure
Refer
to

Performance

Chart

Note

a

The

pressure
will

change
in
the

following
manner
with

changes
in

conditions

When

blower
speed
is
low
dis

charge
pressure
will

drop

When
the
relative

humidity
of
in

take
air
is
low

discharge
pressure

will

drop

b

The

temperature
will

change
in
the

following
manner

with

changes
in

conditions

When
the
ambient
air

temperature

is
low
the
outlet
air

temperature

will
become
low

If
the
test
reveals
that

there
is

any

abnormality
in

system
pressure
isolate

the

cause
and

repair
Refer
to
Trouble

Diagnoses
and
Corrections

REFRIGERANT

LEAKS

If
leaks
are

noticeable
leaky
parts

should
be

repaired
Then
system

should

be
fIlled
with

refrigerant

CAUTION

00

not

operate
compressor
with

refrigerant
level

excessively
low

If
this
caution
is

neglected
a
burnt

compressor
will
result
since

heavy
loss

of

refrigerant
usually
indicates

heavy

loss
of

compressor
liil

I

f

system
has
been

exposed
to

atmosphere
for

an
extended

period
of

time

I
receiver

drier
must
be

replaced

If
leaks
are

slight
and

no
air
is

present

in

system
add

refrigerant
as

necessary

To
detect
leaks

refer
to

Checking

for
Leaks
Here
is

how
leaks

are

stopped

I

Check

torque
on

the
connection

fitting
and
if
too
loose

tighten
to
the

proper
lorque
Check
for

gas
leakage

with
a
leak
detector
Air

Conditioning

2
If

leakage
continues

ven
after

the

fitting
has
been

retightened
dis

charge
refrigerant
from

system
disc
on

net

the

fittings
and

check
its

seating

face

for

damage

Always
replace
even

if

damage
is

slight
J

Check

compressor
6il

and
add
oil

if

required

4

Charge

refrigerant
and
recheck

for

gas
leaks

If

no
leaks
are
found

evacuate

and

charge
system

SERVICE
PROCEDURES

FAST
IDLE

ACTUATOR

ADJUSTMENT
OF

IDLE
SPEED

Engine
model

Transmission
When

A
C
is
OFF
When
A
C
is
ON

F

LCD
is

actuated

Manual

700

rpm
800

rpm

A14
A15

Automatic
650

rpm
800

rpm

at
D

position
at
N

position

The
fast
idle

control
device
is
used

on

cars

equipped
with

an
air

condi

tioner
to
raise
the

idle

speed
auto

matically

Use
the

following
procedures
when

adjusting

1
Run

engine
until
it

reaches

oper

ating

temperature

2

With
air
conditioner
in

OFF

when

compressor
is
not

operated

make

sure
that

clearance
e
between

levers
A
and

8
is

more
than

J
mm

0
12
in

If
clearance
C
is

less
than

J

mm
0
12
in

loosen
cable
lock

screw
and

push
down

on
lever
A

so

that
clearance
C
is

more
than
J
mm

0
12
in

3
Make
sure

that

engine
is
at
cor

rect
idle

speed

4

With
air

conditioner
in

ON
when

F

LC
D
is
actuated

set

engine
speed

to
800

rpm
using

following
procedures

as
a

guide

I
Turn

adjusting
screw
until
en

gine
speed
is
800

rpm

On
cars

equipped
with
automatic

transmission

make
this

adjustment

with
shift
control
lever
in

N

posi

tion
2
If

engine
speed
cannot
be

adjust

ed

properly
with

adjusting
screw

check
and

adjust
clearance
e

again

3

Depress
and
release
accelerator

pedal
several
times
and
make

sure
that

engine

speed
reduces
to
800

rpm
as

pedal
is

released

If
correct

adjustment
is
not
made

repeat

steps
I
to
3
above
until

engine
speed
is

800

rpm
at

idling

1

FlCD

adjusting
screw

2
Lever
A

3
Lever
B

4

Cable
lo
k

screw
Clearance

e

AC381
A

Fig
AC
24
Fast
Idle
Actuotor

AC
18
REMOVAL
AND

INSTALLATION

Remove

vacuum
hose
from
actua

tor

2

Remove
air

cleaner

assembly

3

Remove
cotter

pin
and

pin
and

disconnect

actuator
from
F

LC
D

lever
connected

to
throttle
shaft

4

Remove

actuator

attaching
nuts

then
remove
actuator

5
Install

actuator
in

the
reverse

order
of
removal

6
After

installing
adjust
actuator

Refer
to

Adjustment
of

Idle

Speed

Air

Conditioning

IDLER
PULLEY
AND

COMPRESSOR
DRIVE
BELT

ADJ
USTMENT
OF
BELT
TENSION

Idler

pulley

Alternator

Crankshaft

pulley

Unit

mm
in

Idler

pulley

Fig
AC
25

Belt
Tension

Specified
compressor
belt

tension
is

8

to
12
mm
0
31
to
0
47

in
when

thumb

pressure
of
10

kg
22

Ib
is

applied
midway
between
idler

pulley

and

compressor
pulley

1
Loosen

idler

pulley
lock

nut
and

then

adjust
pulley
by
turning
adjusting

bolt

2

After

adjustment
tighten
idler

pulley
lock
nut
bolt

3
Remove
idler

pulley

4
Install

pulley
in
the

reverse

order
of
removal

5

Adjust
compressor
belt
tension

REMOVAL
AND

INSTALLATION

1

Jack

up
front

of
car
and
remove

under
cover

2
Remove
idler

pulley
lock
nut

and
loosen
belt
tension

adjusting
Fig
AC26
AC382A

Idler

Pulley

TIghtening
torque

@
3
7
to

5
1

kg
m
27
to
37
ft

lb

AC383A

Fig
AC
27

Compressor
and
Bracket

AC
19
REMOVAL

I

Operate

compressor
if

possible

at

engine
idling
speed
with
air
condi

tioner

controls
set
for
maximum
cool

ing
and

high
blower

speed
for20
to

30

minutes
with
all

windows

open
to

return

oil
into

compressor

2
Disconnect

battery
ground
cables

and

compressor
lead
wire
at
con

nector

3

Discharge
refrigerant
from

cool

ing
system
Refer
to

Discharging
Sys

tem

4

Jack

up
front
of
car
and

remove

under
cover

5
Loosen
idler

pulley
lock
nut
and

loosen
tension

adjusting
bolt

fully

Remove

compressor
drive
belt

See

Fig
AC
26

6
Remove

high
and
low
flexible

hoses
from

compressor

WARNING

Gradually
loosen

discharge
side

hose

fitting
and
remove
it
after

remaining
pressure
has
been
re

leased

CAUTION

Be
sure
to

immediately
put
plug
in

flexible
hose
and

compressor
open

ings

7
Remove
bolts

securing
lower

part

of

compressor

8
Remove
bolts

securing
upper
part

of

compressor
Hold

compressor
with

one
hand
when

removing
bolts
and

then
remove

compressor

With

compressor
clutch

up
lift

compressor
out
with

both
hands

CAUTION

00
not

attempt
to
leave
the
com

pressor
on
its
side
or

upside
down

for
more
than
10
minutes
as
the

compressor
oil
will
enter
the
low

pressure
chambers
If
under
that

condition

compressor
should
be

oper

ated

suddenly
internal

damage
would

result
To

expel
oil
from
chambers

hand
crank

compressor
several
times

in
its
installed
condition