fuel type DATSUN 210 1979 Service Manual

Erigine
crankcase

EI
gine
cooling
system

Transmission
case

Final
drive
case

housing

Steering
gear
box

Fuel
tank

Air

conditioning
system

Refrigerant

Compressor
oil

f
tl

It
J

4
i

1

protect
the

catalytic

cop
verter
froitr

contamination
t
n
General
Information

APPROXIMATE
REFILL
CAPACITIES

Without
oil
filter
AI4

Al5

w

Al5

M
T

AfT

MiL

A
T
Liter

US
measure

3
2
3

qt

2
8
3

qt

3

7

llLgt

33
3

qt

5
2
5

qt

5
0
5Y

qt

5
9
6
Y
at

57

6qt

1
3
2
Y

ot

1
2
2

pt

53
5

qt

0
9
1

pt

0
25

pt

50
13
Y
I

0
8
tol

Okg
1

8
to
2
2
1b

0
237

8
0
floz
Withoil

Without
heater

With

heatfr

MaDllal
soeed

5

spee

Automatic
1

1
Includes
2
7

liters
2

US

qt
2

Imp
qt
for

torque
converter

RECOMMENDED
FUEL

Use
an
unleaded
or
low
lead

gaso

line
with
a
minimum
octane

rating
of

91

RON
Research
Octane
Number
For

cars

equipp
d
with
the

Cataly

tic

converter
California
and
FU
mod

els
use

only
unleaded

gasoline
to

RECOMMENDED

Lubricant

GasOline
engine
oil

Gear
oil
Transmission

and

steering

Differential

Au
omatic

TIM
fluid

Multi

purpose
grease

Brake
and
clutch
fluid

Anti
freeze
L
NDED

LUBRICAN

COMMENDED

i

I
VISCOSITY
NUMBER

t1

NGON
0

L
J

I
j
H

I

IlL
I

t

l

I
lc
30
ItM
7

l
t

U

I
ItM
I

L
L
tJ

30

I

I
fu

JIl
inld

do

o

II

L
liOwl

1
I
I
1

10

I
I

I
I
t

I

I

j
r

I

I
J
1

21
l
1
I
71

c

DIUt
I2lItMOl
UGIIII
FI

R

NIl
I
01
a
Specifications
Remarks

APISE

API
GL4
Further
details
refer
to

recommended
SAE

viscosity
chart

API
GL
5

Type
DEXRON

NLGI
No
2
Lithium

soap
base

DOT
US
FMVSS
No
116

Ethylene
glycol
base

GI
5
Imp

meas4re

2

qt

2

qt

3Y

qt

2

it

4

qt

4

q

5Y

qt

5

qt

2Y

pt

2

pt

4

qt

I

pt

pt

II

gal

1
8
to
2
2
lb

83f1
oz

Ji

j

j

f

EMISSION
CONTROL
DEVICES

En
ine
model
I
AI4
I
A1S

B310
Non
CaliCor

Non
California
models
Califor
nia

Car
model
California
models
E
cept
for
C
nada
Canada
nia
modeb

models
Except

for

Canada

M
T
M
T
A
T

Ti
ansmiuion
M
T
A
T
Except
A
T
FU
M
T
A
T
Station
Wagon

FU
models
models
models

AIR
CLEAN
I
A
T
C
air
cleaner
I
X
I
X
X
I
X
I
X
I
X
I
X
I
X
X

ER
Idle
compensator
Dual
type
X
I
X
X
I
X
I
X
I
X
I
X
I
X
X

Fresh
air
duct
X
I
X
X
I
X
I
X
I
I
I
X
X

ENGINE
I
Early
fuel
evaporative
system
X
I
X
X
xl
X
I
X
I
X
I
X
X

BASE
Exhaust
gas
type

CARBV
I
P
T
C
auto
choke
X
I
X
X
X
I
X
I
X
I
X
I
X
X
m

RETOR
I
l

Thr
ttle
opener
X
X
X
X
I
I
X
I
X
I
X
X
Q

I
Fuel
shut
off
system
I
X
I
I
I
3

m
ll

i
Dash
po
t
X
X
X
X
I
X
I
X
I
X
I
X
X

N
l

IGNITION
I
H
I
C
ignitor
X
X
X
X
I
X
I
X
I
X
I
X
X
c

SYSTEM
Spark
timing
contra
system
T
e
S
X
X
X
I
I
I
I
l

X
X
I
X
ll

Thermal
vacuum
valve
X
X
X
I
X
I
I
I
I
X
X
c

Vacuum
delay
valve
X
I
X
I
I
I
X
I
0

X

A
I
S
I
Air
pump
Air
pump
air
cleaner
check
valve
I
X
X
I
X
I
X
I
I
I
I
x
X

A
B
valve

Combined
air
control
C
A
C
valve
I
X
X
I
I
I
I
I
I
X

Relief
valve
I
I
X
I
X
I
I
I
I
X

Air
induction
valve
Filter
A
B
valve
I
I
I
I
X
I
X
I
X

E
G
R
I
Exhaust
gas
recirculation
E
G
R
valve
I
X
I
X
I
X
I
X
I
X
I
X
I
X
I
X
X

SYSTEM
Thetmalvacuum
valve
I
X
I
X
I
X
I
X
I
X
I
X
I
X
I
X
X

Back
pressure
transducer
B
P
T
valve
I
X
I
X
I
X
I
X
I
X
I
I
I
X
X

CATALYZER
I
CatalytJc
converter
I
X
I
X
I
I
I
X
I
I
I
X

Newly
equipped
unit
on
1979
models
M
T
Manual
transmission

Remarks
X
Available
A
T
Automatic
transmission

Not
available
A
T
C
Aute
matic
tempeJ
ature
control

P
T
C
POlitive
temperature
coefficient

A
I
S
Air
injection
system
or
Air
induction
system

A
B
valve
Anti
backfire
valve

make

sure
throttle
valve

operates

click

sound
is
heard

or

continuity

turns
to

OFF
when

engine
speed

decrease
to

idling

If

not

adjust
throttle
valve
switch

Fig
ET
19

AdjlUting
Throttle
V
ve

Switch

FU
models

If
throttle

valve
switch

g1f1not
be

adjusted
to

specification

replace
Engine
Tune

up

Note

If
it
is
difrlCUlt
to

judge
open

tion
of
throttle
valve

switch

by

hearing
Click
sound
caused

by

microswitch
check

as
follows

1

DiscollI
ecl

throttle
va1ve

switch

ronnector

and
connect
circuit

tester
to
throttle
va1ve
switch

2

Run

engine
under

no
load

Increase

engine
speed
slowly
and
make
sure

it
is

within
the

specified
range
when

throttle
valve
switch
is
turned

on

Then
decrease

engine
speed
slowly

and
make
sure
it
is

within
the

specified
range
when
throttle
va1ve

switch
is

turned
off

If
not

adjust
throttle
valve
switch

3
Make

sure

continuity
of
throttle

vaIve
switch
turns

to
OFF
in
the

operation
desaihed

in

step
6

Engine
operation
Engine
speed
when

throttle
valve

switch

operates
Throttle

valve
switch

continuity

When

engine
speed

increases
1

150
i200

rpm

1

000
1
200

rpm
When

engine
speed

decreases

REPLACING

FUEL

FILTER

I

Check
for
a

contaminated
filter

and

water

deposit

0

9

ET011

Fig
ET
20
Fuel
Filter

All

engines
use
a

replaceable
car

tridge
type
fuel
filter
as
an

assembly

2

Replace
fuel
filter
in
accordance

with
maintenance

schedule
OFF

ON

ON

OFF

CHECKING

FUEL

LINES

Hoses

piping

connections
etc

Check
fuel
lines
for

loose
connec

tions
cracks

and
deterioration
Re

tighten
loose

connections
and

replace

any
damaged
or

deformed

parts

REPLACING
AIR

CLEANER
FILTER

Viscous

paper
type
air

cleaner
filter

does

not

require
any
cleaning
opera

tion
until

it
is

replaced
periodically

Sushing
or

blasting
operation
will

cause

clogging
and

result
in

enrich

ment
of
carburetor

mixture
and

should
never
be

conducted

Replace
air

cleaner
filter
in

accord

ance
with
maintenance

schedule

ET
10
CHECKING

AUTOMATIC

TEMPERATURE

CONTROl
AiR

CLEANER

I
Check

that
vacuum
hoses

Intake

manifold
to
3

way
connector
3

way

connector
to

temperature
sensor

3

way
connector
to
idle

compensator

temperature
sensor
to
vacuum
motor

are

securely
connected
in

C9rrect

posi

tion

2

Check
each
hose
for

cracks
or

distortion

3
Check
A
T
C

system
for
function

by
proceeding
as
follows

ConfIrm
that

engine
is
cold
before

starting
test

With

engine
stopp
d

distonnect

fresh
air

duct

Place
a

mirror
at

the
end
of
air

c1eaner
inlet

pipe
as

shown
and
check

to

see
if
air

control

valve
is
in

correct

pOsition

2J

v
7

EF210

Fig
ET
21

Inspecting
Valve
Position

Air

control

va
ve
is
in

correct

posi

tion

if
its

cold
air
inlet
is

open
and
hot

air

inlet
is

closed

4

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

step
3
under

hood
air
inlet
is

closed
and
hot
air

inlet

is

open

5

Check
that
air
control

valve

gradually
opens
to
cold
air
inlet

side
as

engine
warms

up
When
environmental

temperature
around

temperature

sensor
is

low

spend
more
time
for

engine

warning
up
operation
of

facili

tate
smooth

operation
of
air

control

valve

If
the

above

test
reveals

any
prob

lem

in
the

operation
of
air

control

valve

carry
out
the

further

inspection

described
in

Section
EF

TEMPERATURE
SENSOR

Removal

I

Using
pliers
flatten

clip
con

necting
vacuum

hose
to

sensor
vacuum

tube

1

Pipe

2
Catch

3
Fixed
with

adhesive

4
Hose

5
Tab

6

Clip

7
Gasket

EC019

Fig
EF
7

Removing
Seruor

2
Disconnect
hose
from

sensor

3
Take
off

clip
from
sensor
vacuum

tube
and
dismount
sensor

body
from

air
cleaner

Note

The

gasket
between

sensor
and

air

cleaner
is
bonded
to

the
air

cleaner

side
and

should
not

be

removed

Installation

Mount
sensor
on
the

specified

position

2

Insert

clip
into

vacuum
tube
of

sensor
After

installing
each
vacuum

hose

secure
hose
with
the

clip

Note
Be

sure
to
install
vacUl
11n

hose

correctly
Correct

position
is
R
H

side
to

Ntisan

mark
at
the

top

face
of
sensor
for
intake
manifold

L

H
side
for

Deuum
motor

VACUUM

MOTOR

1

Remove

screws

securing
vacuum

motor

to
air
cleaner

2

Disconnect

valve
shaft

attached

to

vacuum
motor

diaphragm
from
air

control
valve

and

remove

vacuum

motor

assembly
from
air

cleaner

3
To
install

reverse
the

removal

procedures
Engine
Fuel

Fig
EF

8
Removing
Vacuum
Motor

INSPECTION

AIR

CLEANER
FILTER

Viscous

paper

type
air

cleaner
filter

does

o
ot

rt

quire
any
cleaning
opera

tion

until
it

is

replaced
periodically

Brushing
or

blasting
operation
will

cause

clogging
and
result

in
enrich

ment

of
carburetor
mixture

and

should
never
be

conducted
For
reo

placement
interval
of
air

cleaner
filter

refer
to

Maintenance

Schedule

AUTOMATIC

TEMPERATURE

CONTROL
SYSTEM

Engine
failures

resulting
from
a

malfunctioning
A
T
C

system
are

manifest

during
cold
weather

opera

tion
Such
failures

include

Engine
stall
or
hesitation

Increase
in
fuel

consumption

Lack
of

power

If
these

phenomena
should

occur

check

A
T
e

system
as

described
in

the

following
before

carrying
out

inspection
of

carburetor

I
Check
that

vacuum
hoses
are

se

l

urely
connected
in
correct

position

2

Check
each
hose

for
cracks
or

distortion

3

Check
A
T

C

system
for

proper

function
as

follo
ys
Confirm
that

engine
is

cold
before

starting
test

With

engine
topped
disconnect

fresh
air

duct
if
so

equipped

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

EF
4
Fig
EF
9

Inspecting
Valve
Po

man

Air
control
valve
is

in
correct

posi

tion
if
its
cold
air
inlet

is

open
and

hot

air
inlet
is

closed

4
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

step
3

under

hood
air
inlet
is
closed

and
hot
air

inlet
is

open

S

Check
that
air
control
valve

grad

ually
opens
to

cold
air

inlet
side

as

engine
warms

up
When

environmental

temperature
around

temperature
sen

sor
is
low

spend
more
time

for

engine

warming
up
operation
to
facilitate

smooth

operation
of
air
control

valve

If
the
above

test
reveals

any
prob

lem
in
the

opera
ion
of
air
control

valve

carry
out
the

following
test

VACUUM
MOTOR

I
With

engine
stopped
confirm

that

cold
air
inlet
is

open
and

hot
air

inlet
is

c1
Sed

If
not

check
air
control
valve
link

age
for

proper
operation

2

DiscoJln
ct
ac
um

motor
inlet

vacuum
hose

and
connect

another

hose
to
the

inlet
to

apply
vacuum
to

vacuum
motor

Vacuum
can

be

appli
d

by
breathing
in

tile
hos
e
end

as

shown
Then

confirm
that

the
air

control
valve

moves

3
With
hot
air
inlet
in

open
posi

tion
as

described
in

step
2

above

pinch
vacuum
hose
with

fingers
and

cut
off
air
from

vacuum
hose
In

this

condition

check
that
air
control

valve

maintains
the

condition
described
in

step
2

for
more
than

30
seconds

and

that
hot

air
inlet

is

open
If

diaphragm

spring
actuates

the
air
control
valve

by

Engine
Fuel

S
Idle

compensator
is
ill

good
order

if
a

hissing
sound
is

heard
when
its

temperature
reaches

operating
tern

perature

If
not

replace
idle

compensator
ldlerompensator
l
b
l

r
I

No
1
60
to
700C

140
to
15

Of

No
2
70

to
800C

158
to
1760F

FUEL
FILTER

DESCRIPTION

t
t

I

J
i

l
The
fuel
filter
is
a

cartridge
type
It

useS
a

paper
element

1
Body

2

Paper
element

3
Cover
EFOOS

Fig
EF

14
Sectional
View
of
Cartridge

Type
FuelFilte

FUEL
PUMP

t

j
f

EC132

Fig
EF
15
Schematic
View

of
Fuel

Pump

EF
6
OPERATING
TEST

Note
When

disconnecting
fuel
hoses

me
a

container
to
receive
fuel

remaining
in
fuel
hoses

STATIC
PRESSURE
TEST

The
static

pressure
test
should
be

conducted

as
follows

I
Disconnect
fuel
hose

between
car

buretor
and
fuel

pump

2
Connect
a
rubber
hose
to
each

open
end
of
aT
connector
and
con

nect
this
connector
hose

assembly
be

tween
carburetor
and
fuel

pump

Note
Locate
this
T
eonnector

as

close
to
carburetor
as

possible

3

Connect
a
suitable

pressure
gauge

to

the

opening
of

T
connector
and

fasten
the
hose
between
carburetor

and
T

connector

secUrely
with
a

clip

4
Start
and
run
the

engine
at

various

speeds

DESCRIPTION

The

carburetors
are

of
downdraft

two

barrel

type

designed
to
increase

ppwe
r
a
fu
l
eC

l
Il
Y
t

3
ell
a

to

reduce

exhaust

gas
emissions

These
carburetors

present
several

distinct
features
of

importance
to

car

owner

A

summary
of

features
is
as
fol

lows

1

Secondary
throttle
valve
is

oper

ated

by
throttle
lever

High
power
and

good
acceleration
are

gained
with
com

bination
of
the

auxiliary
valve

2

Accelerating

pump
provide
ex

cellent
acceleration

3
Power
valve
mechanism
is

a
vacuo

urn
actuated

boost

type
and

improves

high
speed
driving

4

The
throttle

opener
control

sys

tem

Except
FU
model

incorporates
a

servo

diaphragm
which

helps
open
the

throttle
valve
at

a

decreasing
speed
so

as
to

reduce

hydrocarbon
emissions

to

a
minimum

5
An
anti
d

eseling
solenoid

valve
is

installed
to

prevent
dieseling
When

ignition
key
is

turned
off
the

fuel

passage
involved
in
the
ow

system
is

closed
and
the
fuel

supply
is
shut

down

completely

The
solenoid
valve
also

serves
as
an

actuator
of
the
fuel

shut
off

system
on

the

FU
model

6
In
the
choke
mechanism
an

elec

trie
automatic

choke
is
used

to
auto

maticaDy
control
chok
valve

opera

tion

during
engin
war

up

7

The
carburetor
comes

equipped

with
dash

pot
which
ensures
smooth

deceleration
without

engine
stall
under

aU

operating
conditions

STRUCTURE
AND

OPERATION

These
carburetors
consist
of
a

main

system
for
normal

running
a
slow

system
for

idling
and

an

accelerating

and

power
mechanisIll

Some

emission
control
devices

are

added
E
ngine
Fuel

CARBURETOR

I

J

1

Primary
main

jet

2
Idle

adjust
screw

3
hUe
nozzle

4

By
pass
hole

5

Primary
throttle
valve

6

Primary
slow

jet

7

ptug

8

Primary
5l

w
air
bleed

9

Primary
main
air
bleed
10

Primary
air
vent

pipe

11

Primuy
main

nozzle

12

Choke
valve

13

Primary
small

venturi

14

Secondary
small

venturi

15

Secondary
air
vent

pipe

16

Secondary
main

nozzle

17

Secondary
main
air
bleed

18

Secondary
slow

air
bleed

1
Oloke
valve

2

Primary
air
vent

pipe

3
Prima
y
main
nozzle

4

Primary
slow

jet
19

Plug

20

Secondary
slow

jet

21

Needte

22
Fuel
fLlter

23

Secondary
tIuottle

valve

24

Auxiliary
valve

25

Secondary
main

jet

Note
Do
not
remo
the

parts
inarbd

with
anuteriak

EF416A

Fig
EF
17
Carburetor

PRIMARY

SYSTEM

PrlinarJ
main

sJstam

The
fUel

flowing
out
of
the

passages

at
bottom
of

float
chamber

passes

through
the

primary
main

jet
and
is

mixed
with
air

coming
from
main
air

bleed
The

gas
mixture
is

pulled
out

into
the

venturi

through
the
main

nozzle

When

throttle
valve
is
wide

open

and

engine
require
dense
mixture

gas

power
valve

opens
and
fuel
also
flows

into
main

system

EF044A

Fig
EF
18

PtJrlially

Loading

EF
8

t

1

Primary
main
nozzle

2

Primary
main
air
bleed

3
Primary
slow
air
bleed

4

Primary
slow

jet

5

Primary
main

jet

6
Idle
nozzle

7

Primary
throttle

valve

EF417A

Fig
EF
I9

Portially
Loading

IdUns
nd
slow

system

Passing
through
the
main

jet
the

fuel

passage
is

separated
from
main

line
fuel
flows

through
the
slow

jet

primary
slow
air
bleed
is

ejected
from

the

by

pass
hole
and
idle
nozzle

cp
v

Ii

l

1

Primary
main
air
bleed

2

Primary
slow
air

bleed

3
Anti
fieseling
solenoid
valve

4

Primary
main

jet

5
Idle
nozzle

6

Primary
throttle

valve

EF711

Fig
EF

20

Idling
and
Slow

System

Aceeler

tlns
meeh

nlsm

A

mechanical

accelerating

pump

synchronized
with
the
throttle
valve
is

used
Engine
Fuel

When
throttle
valve
is
closed

piston

rod

is

pushed

up
wi
th

linkage
which

pushes
up
piston
through
piston
return

spring

When

piston
comes
down
inlet

valve

closes
outlet
valve

opens
and

fuel
within
the

pump
is

blown
out

from
the

pump
je
t

by
compressed

piston
return

spring
The
fuel
hits

against
side
wall
of
small
venturi

becoming
minute

drops
and

compen

sating
transient

spareness
of

fuel

1

r

@
CD

V

1
Piston

2

Pump
lever

3

Pump
nozzle

4
Piston

return

spring
5
Inlet
valve
EF239

6
Outlet
valve

7

Primary
throttle
valve

8

Pump
connecting
rod

Fig
EF

21
Accelerating
Mechani
m

Power
v
lve
meeh
nlsm

The
vacuum
actuated
boost

type

power
va
v

mechanism
makes
use
of

the
downward

pulling
force
of
the

air

stream
below
throttle
valve

When

throttle
valve
is

slightly
open

ed

during
light
load

running
a

high

vacuum

p
ston

upward
against
the

spring
leaving

power
valve
closed

When
vacuum

is
lowered

during
full

load

or
acceleration
the

spring
pushes

vacuum

piston
downward

opening

power
valve
to

furnish
fuel

I

t
f

i

1
Vacuum

piston

2
Power
valve

EF240

Fig
EF

22
Power
Valve

EF
9
SECONDARY
SYSTEM

Second

ry
m

ln

system

When
the

primary
throttle
valve
is

wide

open
and

engine
produces
high

power
the

secondary
throttle
valve

begins
to

open
by
the

linkage

However

auxiliary
valve
does
not

open
at
a
slow

speed
due

to
counter

weight
connected
to
valve
shaft

As

engine
picks

up
speeds
the

auxiliary
valve

opens
against
the

load

of

counterweight
and

secondary
sys

em
starts

operation
for

high

power

operation
The
fuel

flowing
out
of
the

passage
at
bottom
of
float
chamt
er

passes
through
secondary
main

jet

The

fuel
is
mixed
wi
th

air

coming

from
main
air
bleed
and

mixture
is

blown
in
to
the
venturi

through
main

nozzle

When

primary
throttle
valve
is

in

full

open

position

secondary
throt

tle
valve
is

also

fully

opened

I

Secl
ndary
slow
air
bleed

2

Secondary
main

air
bleed

3

Secondary
main
nozzle

4

Primary
main
nozzle

5

Primary
main
air

bleed

6

Primary
slow
air

bleed

7

Primary
slow

jet

8
Primary
main

jet

9
Idle
nozzle

10

Primary
throttle
valve

11

Auxiliary
valve

12

Secondary
throttle
valve

13

Secondary
main

jet

14

Counterweight

15

Secondary
slow

jet

EF418A

Fig
EF

23
At
Full

Open
Stow

Speed

I

Secondary
slow
air

bleed

2

Secondary
main
air
bleed

3

Secondary
main
nozzle

4

Primary
main
nozzle

5

Primary
main

air
bleed

6

Primary
slow
air
bleed

7

Primary
slow

jet

8

Primary
main

jet

9
Idle
nozzle

10
Primary
throttle
valve

II

Auxiliary
valve

12
Seco
dary
throttle
valve

13

Secondary
main

jet

14

Counterweight

IS

Secondary
slow

jet

EF419A

Fig
EF
24
At
Full

Open
High
Speed
Engine
Fuel

Secondary
slow

system

Step
system

The
construction
of
this

system

corresponds
to

the

idling
and
slow

system
of
the

primary
system

This

system
aims

at
the

power

filling
up
of
the

gap
when

fuel

supply

is
transferred
from

the

primary
system

to
the

secondary
system
The

stepport

is
located

near
the

auxiliary
valve
in
its

fully
closed
state

ANTI

DIESELING
SYSTEM

The

carburetor
is

equipped
with
an

anti
liese1i

lg
solenoid

valye

As
the

ignition
switch
is

turned
off

the
valve
is

brought
into

operation

shutting
off
the

supply
of

fuel
to

the

slow
circuit

The

following
figure
shows
a
see

tional
view

of
this

control

An

ti
dies

eling
solenoid
valve

Ignition
switch
OFF

ON

t

L
li

FLOAT
SYSTEM

There
is

only
one
float
chamber

while
two
carburetor

systems

primary

and

secondary
are

provided

Fuel
fed
from
the
fuel

pump
flows

through
the
filter
and
needle
valve
into

the
float

chamber
A
constant
fuel

level
is
maintained

by
the

float
and

needle
valve

Because
of

the
inner
air

vent

type

float

chamber
ventilation
fuel
con

sumption
is

not
affected

by
dirt
ac

cumulated
in

the
air
cleaner
Ignition
switch

Q

1

T
Battery

niT

EC
3

Fig
EF
25

Anti
dieseling
Solenoid
Valve

The
needle
valve
includes

special

hard

steel
ball
and
wiD

not
wear
for
all

its

considerably

long
use

Besides
the
insertion
of

a

spring

will

prevent
the

flooding
at

rough
road

running

THROTTLE
OPENER

CONTROL
SYSTEM

T
O
C
S

Except
FU

model

The
function

of
the
throttle

opener

is
to

open
the

throttle
valve
of
the

carburetor

slightly
while
the
car
is
in

EF
10
deceleration

During
deceleration

the

manifold
vacuum
rises
and

the

quan

tity
of
mixture
in
the

engine
is

not

suffICient
for
normal

combustion
to

continue

4
consequently
a

great

amount
of

unburned
HC
is
emitted

Carburetors

equipped
with

the

throttle

opener
supply
the

engine
with

an

adequate
charge
of

combustible

mixture
to
maintain

proper
combus

tion

during
deceleration

resulting
in
a

dramatic
reduction
in
HC

emission

The

system
for
the

manual
trans

mission
model
consists
of

servo
dia

phragm
vlicuum

control
valve
throttle

opener
solenoid
valve

spee
l

detecting

switch
and

amplifier
On

the
auto

matic

transmission
model
an
inhibitor

and
inhibitor

relay
are
used
in

place
of

speed

detecting
switch
and

amplifier

on
the
manual
transmission

model
An

altitude

corrector
fitted
to
vacuum

control
valve

serves
to

automatically

regulate
the

operating
pressure
in

the

system
with

variation
of

atmospheric

pressure

T
o
C
S
n

operatIon

At
the

moment

when
the

manifold

vacuum
increases
as

occurs

upon
de

celeration

the
vacuum

control
valve

opens
to
transfer

the
manifold

vacuum

to
the
servo

diaphragm
chamber
and

the
throttle
valve
of
the

carburetor

opens

slightly

Under
this

condition
a

proper

amount

of
fresh
air

is
sucked

into
the

combustion
chamber
As
the
result

complete
combustion
of
fuel
is

as

sisted

by
this
additional
air

and
the

amount

of
H
C

contained
in

exhaust

gases
is

dramatically
reduced

Throttle

Clpener
sol
nold

valve

operation

Manual

transmission
models

The
throttle

opener
solenoid
valve

is
controlled

by
a

speed

detecting

switch
which
is

actuated

by
the

speed

ometer
needle

As
the

car

sp
ed
falls
below
16

km
h
10
MPH

this
switch
is
acti

vated

producing
a

signal

The

signal
is

led
to
the

amplifier
so

that
the

signal
can
be

amplified
to

a

degree

large
enough
to
actuate
the

ELECTRIC
AUTOMATIC

CHOKE

An
electric
heater
warms
a
bi
metal

interconnected
to
the
choke
valve
and

controls
the

position
of
c
oke

valve

and
throttle
valve
in
accordance

with

the

time

elapsed
the
warm

up
condi

tion
of
the

engine
and
the
outside

ambient

temperature

Electric
heater

The
electric

heater
is
made

up
of

a

semiconductor
and

installed
in

the

automatic
choke
cover
in

the

body

2
Bi
metal

Electric
current

flows

through
the

heater

as
the

engine
starts
and
warms

the
bi
metal
The

deflection
of
the

bi

metal
is

transmitted
to
the
choke

valve

through
the

choke
valve
lever

3

Fast
idle
cam

The

fast
idle

cam
determines
the

opening
of
the

throttle
valve

SQ
that

the

proper
amount

of
mixture

cor

responding
to
the

opening
of
the

choke
valve
will
be

obtained
The

opening
of
the

choke
valve
is
de

pendent

upon
the
warm

up
condition

of

the

engine

4
Choke
unloader

When

accelerating
the

engine
during

the

warm

up
period
that
is

before
the

choke
valve

opens
sufficiently
this

unloader
forces
the

choke
valve

open
a

little

so
as
to
obtain
an

adequate

air
fuel
mixture

S

Vacuum
break

diaphragm

After
the

engine
has
been
started

by
cranking
this

diaphragm
forces
the

choke
valve

open
to
the

predetermined

extent
so
as
to

provide
the

proper

air
fuel
ratio

A
two

stage
acting
type
vacuum

diaphragm
is

employed

6
Si
metal

case
index
mark

The
bi
metal
case
index
mark
is

used
for

selling
the
moment
of
the

bi
metal
which
controls
the
air

fuel

mixture
ratio

required
for

starting
Engine
Fuel

r
m

2

3

4

5

6
r
3

1

@
@
Alternator
L

terminal

Automatic

choke

relay

Automatic
choke

cover

P
T
C
heater

Bi

metaJ

spring

Choke
valve

Fig
EF
31
Electric
Automatic
Choke

l
eater
EF045A

l

A

Higher
ambient
temperature

Manifold

vacuum
Clearance
B

B
Lower
ambient

temperature
Clearance

Manifold

vacuum
1
Hi
metal

2
P
T
e
heater

3
Thermostat
cover

4
Vacuum

diaphragm

5
Fast
idle

earn

6
Bi
metal
cover

index
mark

7
Choke
shaft
lever

8
Choke
valve

9
Unloader

tang

10
Throttle
valve

11
Fast

idle

adjusting
screw

EF243

t

Diaphragm

2

Spring
I

3

Spring
11

4
Rod

5
Choke
valve

6
Plate

@
7
Bi
metal

EF884

Fig
EF

32
Electric
Automatic
Choke

EF

13

EF053A

Fig
EF

50

Removing
JWrneu

of

Solenoid
valve

2

Connect
rubber
hose

between

vacuum

gauge
and
intake
manifold

Note
A

quick
response
type
boost

gauge
such

as
Bourdon
s

type
is

recommended
a

mercury
type

manometer
should
not
be

used

3
Warm

up
engine
until
it

reaches

operating

temperature
Then

confirm

that

engine
idling

speed
is

specified

valve

Engine

idling
speed

Manual

transmission

700

rpm
Engine
Fuel

Automatic
transmission

in
0

position

650rpm

Note

On
automatic

transmission

models
never

race

engine
when

gearshift
lever

is
in
0

position

4
Run

engine
under
no

load
In

crease

engine
speed
to
3

000

to
3
500

rpm
then

quickly
close
throttle
valve

S
At
the
time
manifold

vacuum

pressure
increases

abruptly
to

600

rnmHg
23
6

inHg
or
above
and

then

gradually
decreases
to
the
level

set
at

idling

a

Maximum

negative
pressure

b

Operating
pressure

c

Idling
pressure

Nega
ive

pressure

EC502

Time

Fig
EF

52
Characteristic
Curve

of

T
O
C
S

6
Check
that
the
T

O
C
s

operating

pressure
is

within
the

specified
pres

sure

Specified

pressure
0
m

sea
level

end
760

mmHg
30

inHgl
atmOs

pheric
pressure

Non
Califomia

models

520
20

mmHg

20
47
0
79

inHg

California
models

560
20

mmHg

22
05

9
79

inHgl

7

I

If
it
is
lower

than
the

specified

level

turn
the

adjusting
screw
or

nut

in
the

following
direction

until
correct

adjustment
is

made

Adjusting
nut

Clockwise

2
If
it
is

higher
than
the

specified

levei
turn
the

adjusting
screw
or

nut

in
the

following
direction
until
correct

adjustment
is

made

EF
20
Adjusting
nut

Counterclockwise

Note

When

adjusting
T

O
C
S
turn

adjusting
nut
in
or
out
with
lock

spring
in

place
Always
set
lock

spring
properly
to

prevent
changes

in

set

pressure

Vo

1

Adjusting
nut

2
Lock

spring

n

EC802

EF055A

Fig
EF
53

Adjusting
Ope
llting

Pre
3ure

Note
The

operating

pressure
varies
in

proportion
to
altitude

a
When

atmospheric

pressure
is

known

operating
pressure
will
be

found

by
tracing
the

arrow
line

A
When

altitude
is

known

op

erating

pressure
will
be

found

by

tracing
the

arrow
line

B

b

When

checking
T

O

C
S

operating

pressure
note

atmospheric
pressure

and
above
sea

level
in
which

check