1979 DATSUN 210 heating

Body
Electrical

System

VENTILATING
AND
HEATING
BI
LEVEL

BI

LEVEL

position

COl
OFF
VENT
B

l
HElT

HOT

Move
the
lever
to
the

desired

temperature

HEATING

HEAT

position

OFF
IINl

COlO
L
HElT

HOT

Move
the
lever
to

the

desired

temperature

DEFROSTING

OFF
VENT
L
HElT

HOT

J
COlf

Move
the
lever
to
the

desired

temperature

RECIRCULATING

OFF

COlOr
VENT
L
HEll

HOT

Move
the
lever

to
the

desired
temperature
RECHEIl

fIN
OfF
1
2
3
Olf

Move
the
lever

to
the

desired
air
flow

I
Olf
RECHll

FIN
OfF
1
2
3

Move
the
lever
to
the

desired
air
flow

OEF

position

Olf
RECHll

fIN
OFH
2
3

Move
the
lever

to
the

desired
air
flow

RECIRC

position

J

1
OEf
RECHEIl

fIN
PfF
I

3

J

Move
the
lever

to
the

desired
air
flow

BE
25
To
defroster
nozzle

ft
To
side

L
defroster

Outside
air

L
c

U

D

l

To
floor

BEl40D

Fig
BE
59

Ventilating
and

Heating
Air
Flow

To
defroster

nozzle

fr

Outside
air
c
t

Ul

B
yO

Toflaor

BE141D

Fig
BE

60

Heating
Air
Flow

To
defroster
nozzle

fr

Outside
air

Ul

@Jtc
Y
D

l

1

BE142D

Fig
BE
61

Defrosting
Air
Flow

To
defroster

nozzle

LJ

Iniideair
c

@

To
floor

BE143D

Fig
BE

62
Recirculating
Air
Flow

Condition

Insufficient

heating

performance

No
heated

air

discharged

Insufficient
air

flow

to

floor

Insufficient

defrosting

performance

Cold
air

discharged

Insufficient
air
flow

to
defroster

Heated
air

discharged

with

lever
in
VENT

Blower

motor
does

not

run

Control
lever

drags

Outside
air
comes
in

with
fan
in
OFF

Noise

frol11
blower

motor
Body
Electrical

System

Probable
cause

Cooling
water

temperature
too

low

Heater
core

plugged

Insufficient

cooling
water

level

Malfunctioning
air
mix
door

Malfunctioning
water

cock

Blower
motor

speed
too

low

Malfunctioning
floor
door

Refer
to
No

heated
air

discharged

Malfunctioning
hoor
door

or
faulty
seal

Defroster
nozzle

plugged

Leak

at
defroster
duct
lo
nozzle
connection

Water
cock
not

operating
properly

Mode
door
not

operating
properly
or

seal

damaged

Fuse
melted

MOlor
wire
connector
disconnected

Faulty
switch

Faulty
motor

Faultyblower
control

amplifier

Inner
wire

rubbing

against
outer
case
end

Control
cable
bent

excessively

Malfunctioniilg
doors
door

levers
etc

Air

intake
door
not

operating

properly

Control

cable
out
of

adjustment

Loose
bolt

in
blower

motor

BE

56
Corrective
action

Check
thermostat

Rep1ace
as
nece

ry

Clean

Rem

Adjust
control
cable

Adjust
control
cable

Check
motor
terminal

voltage

Repair

poor
connection
and

discontinuity

Replace
motor
if

necessary

Replace
blower

control

amplifier
if
neces

sary

Adjust
control
cable

Adjust
control
cable

Clean

Correcl

Adjust
control
cable

Adjust
control
cable

Correct

cause
and

replace

qrrect

Replace

Check
and

correct

Replace

Adjust
control
cable

Correct

Ch

ck
and
COrrect

Repair
or

replace

Adjust
control
cable

Check
and

tighten
loose
bolts

Air

Conditioning

DESCRIPTION

OUTLINE
OF
AIR

CONDITIONER
level
and

ventilation
functions
Its

control

system
consists

of
a
mechani

cal

system

using
cables
and

engine

vacuum
and
electric

system

The

component
units

of
the
air

conditioner
are
installed
in
the

engine

and

passenger
compartments
the
compressor
and
condenser
in

the
for

mer

and
the
unit

comprising
the

evaporator
heater
and
blower
and
i

Is

control
in
the

latter
The

units
in

the

passenger
compartment
aTe
summa

rized
as
foUows
Th

ipr
conditio
er
isa

combine4

unit

of
an

evaporator
heater
and

blower
and

provides
heating
and
cool

lng
functions
In

addition
it

has
hi

I

1
Heater
unit

2
Ventilation

door

3

Air
mix
dom

4

Air
intake
door

5

Cooling
unit

6
E

r
or

7
Blower
motor

8
Floor
door

AC377A

Fig
AC
1
Air

Conditioning
Unit
and
Air
Flow

AC
2

to

DISASSEMBLY

AND
ASSEMBLY

y
1

7
1
r

II

l

1

Using
a
knife
cut

packings
at

upper
and
lower
case
fit
in

portion

2
Remove

clips
fixing
upper
case
to

lower

case

3

Separate
upper
case
from
lower

case

by

pulling
it

upward

4
Withdraw

evaporator
assembly

out
oflower
case

5
Remove
thermostat
from

upper

case

by
removing

attaching
screWs

CAUTION

Capillary
tube
should
not
be
bent

too

sharply

6
To
assemble
reverse
the

order
of

disassembly
Be

sure
to

join
mating

surfaces
of

packings
at

upper
and

lower
case
fit
in

portion
with
an
adhe

sive

substance

Note

When

installing
thermostat

in

sert

capillary
tube
in
same

place
as

it

was
before
removal
Be
sure
to

insert

capillary
tube
end
about

50

em
19
7

in
from

evaporator
core

INSPECT

ON

In

case

evaporator
core
or

expan

sion

valve
have

gas

leaking
repair
or

replace
it
with

a
new
one
as

necessary

Dirt
and

nicotine
accumulation

on

evaporator
case
will

go
b
d
and
smell
Air

Conditioning

1

Mainrelay

2

Thermostat

3

Upper
case

4

Expansion
valve

5

Evaporator
assembly

6

Lower
case

ID

AC387A

Fig
AC
32

Cooling
Unit

This
means
that

you
have
to

remove

them
from
time

to
time
to
assure

healthful
fresh
air
inside

car

INSTAllATION

Install

evaporator
in
the
reverse

order

of
removal

observing
the
follow

ing

I
When

replacing

evaporator
with

new

one

charge
compressor
with

same
amount
of
new
oil
as
was
drained

before

2

Evaporator
case
should

be
in

stalled
as

close
s

possible
to

heater

unit

3
Refer
to

Fig
AC
29
for

tighten

ing

torque
of
flare
nuts

4
Refer
to
General
Service

for

evacuating
and

charging
system

5
Conduct
leak
test
and
ensu
e

that

there
is

no

gas
leak
from
conne
tion

EXPANSION
VALVE

Expansion
valve
malfunctions
such

as
valve

stuck

open
valve
stuck

close

refrigerant
leakage
and

improper
in

stall
tion

of

sensing
bulb
are
de

scribed

The
first
two
conditions

require

replacement
of

expansion
valve

When
both
water

and

refrigerant

AC

22
are
circulated

in
the

system
frost
cwill

form

near
the
ball
of

expansion
alve

and

block
the
flow
of

refrigerant
In

this
case

however

operation
of
the

valve

can
be
returned
to

normal

by

heating
the
valve

Expansion
valve
is

equipped
with

an

adjusting
screw
However
since

the

screw
is
set

properly
at

the

factory

adjustment
is

unnecessary
If

expan

sion

valve
is

damaged

replace
with

new
one

RIEMOV
L
AND

INSTALlATION

See

Fig
AC
32

Disconnect

baltery
ground
cable

2
Remove
ev

porator
Refer
to

Cooling
Unit
for

removal

3

Remove
heat
insulator

covering

expansion
valve

assembly

4
Remove

clamp
attaching
sensing

bulb

5

Loosen
flare
nuts
and
remove

expansion
valve
from

evaporator
and

inlet

pipe

CAUTION

Plug
all

openings
to

prevent
entrance

of
dirt
and
moisture

6

Installation
is
ill
the
reverse
order

of

removal

THERMOSTAT

REMOVAL
AND

INSTALlATION

See

Fig
AC
32

Remove

cooling
unit

2
Remove

screws

attaching
thenno

stat
and
then

remove
thermostat

CAUTION

Capillary
tube
should
not
be
bent

too

sharply

3
Installation
is
in

the
reverse
order

of
removal