1979 DATSUN 210 engine

1

Ignition
switch

2

Amplifier

3

Speed
switch
Note

a

Tightening
torque
is
1
8

to
2
2

kg
m
13
to
16
ft
Ib

b
After

replacement
start

engine
and

check
to
be
sure
that
fuel
is
not

leaking
and
that
anti
dieseling
sole

noid
i

in

good
condition

EFOSOA

Fig
EF47
Checking
Anti
dieaeling

Solenoid

l
SJ
Engine
Fuel

THROTTLE
OPENER

CONTROL
SYSTEM

When

idling
speed
is
too

high
and

does
not

drop
to

idling
speed
the

throttle

opener
control

system
should

be

checked

Manual
transmission
models

I

Check
for

continuity
between
A

and
8
terminals

specified
in
function

check

connector
with

ignition
switch

OFF

If

continuity
does
not
exist

sole

noid

may
be

faulty
Replace
throttle

opener
control
valve

assembly

e

1J
3

o
0

5

4

Solenoid

5
F
nction

check

connector

EF434A

Fig
EF
48
Circuit

Diagram
for
Throttle

Opener
Control
System
MIT

2

Turn
on

ignition
switch
and

check

voltage
across
terminals
A
and

8
l2V

battery
voltage
should

appear

in

this

step

If
not

check
fuse
or

amplifier

3

Keep
ignition
switch
ON

remove

speedometer
cable
from
combination

meter
Then

spin
speedometer
in

com

bination
meter
with

fingers
and
con

firm
that
the

speedometer
pointer

indicates
more
than
16
km

h

10

MPH

temporarily
Voltage
between

A

and
8
terminals
should
be

chang

ed

as
follows
More
than
10

miles
OV

Less
than
10
miles
12V

If

not

amplifier
or

speed
detecting

switch

may
be

faulty
replace
parts

with

new
ones

Automatic
transmission
models

I
Check
for

continuity
between
A

and
8

terminals

specified
in
function

check

connector
with

ignition
switch

OFF

EF
19
If

continuity
does

not
exist
sole

noid

may
be

faulty
Replace
throttle

opener
control
valve

assembly

If
t

r

If

I

Inhibitor
switch

N
p

ON

2
Solenoid

3
Function
check

connector
EF43SA

Fig
EF

49
Circuit

Diagram
for

Throttle

Opener
Control

System
AfT

2
Turn

ignition
switch
ON
check

voltage
across
A

and
8
terminals

Voltage
between
two
terminals

should
be

changed
as
follows

If
not

replace
inhibitor
switch

N
or
p

position
OV

Other
than

N

and
p

position
l2V

THROTTLE
OPENER

OPERATING
PRESSURE

I
Remove
harness
of
solenoid
valve

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

is

to
be
made
and
determine
set

pressure
by
the

information
fur

nished

For

example
if
above
sea
level
is

1

000
m
3
280
ft

operating
pres

sure
will
then
be
475

mmHg

18
7

inHg
on
non

California

models
or
495

mmHg
19
5

inHg
on
California
models

In
other
words
T

O
C
S

operates

at
475

mmHg
18
7

inHg
or

490

mmHg
19
3

inHg

8
Race

engine
and

check
for

adjust

ment

9
If

engine
speed
will

not

drop
to

idling
speed
when

checking
throttle

opener
operating

pressure
proceed
as

follows

I
Turn

adjusting
screw
counter

clockwise

so
that
throttle

opener
oper

ating
pressure
is
on

high
vacuum
side
Engine
Fuel

25

mmHg
0

98

inHg
away
from
the

specified
value

2

Turn

adjusting
screw
l
O
of
a
turn

clockwise

so
that
throttle

opener
oper

ating
pressure
drops
by
25

mmHg

0
98

inHg

10
If
throttle

opener
operating

pressure
cannot
be
observed

clearly

even
in

step
9

proceed
as
follows

I
Turn

adjusting
screw
counter

clockwise

so
that
tluottle

opener

oper

ating
pressure
is
on

high
vacuum
side

50

mmHg
1
97

inHg
away
from

mid

point
of
the

specified
range

2
Turn

adjusting
screw
l
of
a
turn

clockwise

Note

The
throttle

opener
operating

pressure
should
be

correctly
set

within
the

specified
range
after
the

above

adju
stments
even
if
the
en

gine
speed
cannot
be
decreased
to

idling

inHg
mmHg

30

750

29

28

24

A

600

700

23
27

560

26
22

550

650

21
25

0

0
20
24

500

600
0

0

19

23

c

o

c

22

ii
18
0

0
450

550
E

c

0

17
2

16
20

400

500

15
B

Non
California
model

350
14

California
model

13

300

5

000
6

000
1ft

0
1
000
2
000
3
001
4
000

0
0
5
1
5
2
km

Altitude

EF056A

Fig
EF
54

Clumges
in

Operating
Pressure
Versus

Changes
in

Atmospheric

Pressure

EF
21
SERVO
DIAPHRAGM

STROKE

I
Connect

engine
tachometer

2
Warm

up
engine
until
it

reaches

operating
temperature

3
Disconnect
rubber
hose
between

servo

diaphragm
and

vacuum
control

valve

Then

connect
rubber

hose
to
in

take
manifold

Servo

diaphragm

Rubber
hose

T

O
C
S

solenoid
valve

T

O
C
S
control
valve

EF250

EF057A

Fig
EF
55

Connecting
Rubber
Hose

to

Intake

Manifold

4
Servo

diaphragm
is

functioning

properly
if

engine
speed
comes
into

the

specified

range

Specified
engine
speed

1
650

to

1
850
rpm

except

Californial

1

900
to
2

100

rpm

for
California

5
If

necessary
adjust
engine
speed

until
it
is
in
the

specified
range
using

servo
diaphragm

adjusting
screw

When

engine

speed
is

lower
than

the

prescribed
range

Turn

adjusting
screw

clockwise

When

engine
speed
is

higher
than

the

prescribed
range

Turn

adjusting
screw

counterclockwise

1

Servo

diaphragm
4

Stopper

2
Bracket
5
Link

3
Lock
nut
6
Carburetor

EF732

Fig
EF
56

Adjusting
Seroo

Diaphragm

Adjwting
Screw

FUEL

SHUT
OFF

SYSTEM

Precautions

a

Before

checking
make
sure

engine

is

warmed

up
and
choke
wive
is

fully
open

b

On
air
conditioner

equipped
mod

els
turn
off

air
conditioner
switch

in

steps
I

through
12

c

Keep
clutch

pedal
held
down
with

your
foot
while

depressing
accele

g

f
J

1
Engine
Fuel

rator

pedllI
when
shift
leVer
ISm

any
position
other
than

neutral

Otherwise
car
will

surge
forward

abruptly

Note
Do

not
attach
test
leads
of
a

circuit
tester
to
terminals
other

than
those

designated

Run

engine
at

idling

speed

2
Disconnect

anti
dieseling
solenoid

valve
connector
and
make

sure
that

engine

stops
If

not

replace
anti

dieseling
solenoid
valve

assembly

EF856

Fig
EF

57

Checking
Function

of

Anti
die

eling
Solenoid
Valve

31
A

t

CID

@

V

II
l

To

distributor

T
n

l1on
coon
o

1

Ignition
switch

2
Fuse

3

Anti
dieseling
solenoid

4

Neu
tral

detecting
switch
5
Throttle
valve
swltch

6

Engine
revolution
switch

7

Transistor

ignition
unit

8
Function
test
connector

Fig
EF
58

Checking
Fuel
Shut
off

System
Operation
with
Function

Test
Connector
EF436A

EF
22
3
Conilect
anti

ieselingsolenoid

valve
connector

4
Restart

engine

5
Connect

circuit
tester

as
shown
in

Fig
EF
S8

6

Depress
clutch

pedal
and

shift

gears
into
5th

position

7

Depressing
clutch

pedal
increase

engine
speed
to

about
3

000

rpm
by

depressing
accelerator

pedal
Then

quickly
close
throttle
wIve

by
re

leasing
accelerator

pedal

8
At
this
time
check

for

presence

of

voltage
across
A

and
B

I
If

voltmeter

reading
i
ero
dur

ing
acceleration
and
is
12V

during

deceleration
fuel
shut
off

system
is

functioning

2
If

voltmeter

reading
is

zero
or

l2V
in

both

engine
operations
fuel

shut
off

system
is

malfunctioning

In

any
case
continue
with
the

following
items

9

Shift
lever
to
neutral

then
in

crease

engine
speed
and

quickly
close

throttle
valve

If

voltmeter

reading
is

zero
in
both

engine
operations
and
results
of
test

i
tern

8
are
correct
neutral

detecting

switch
is

functioning
properly
If
not

check
neutral

detecting
switch
harness

and
connections

Replace
if

necessary

10
Turn

off

ignition
switch

II

Disconnect
throttle
valve
switch

connector
and
connect

circuit
tester

to
throttle
valve
switch
connector

12

Run

engine
under

no
load
In

crease

engine

speed
slowly
and
make

sure

engine
speed
is
within
the

speci

fied

range
when
throttle
valve
switch
is

turned
on

Then

decrease

engine
speed
slowly

and
make
sure

engine
speed
is
within

the

specified
range
when
throttle
valve

switch
is
turned

off

If
not

adjust
throttle
valve

switch

13
In
air

conditioner

equipped

models

proceed
as
follows

I
Check
F
l
C
D

rpm
and
correct

if

necessary

2
With

air
conditioner
in
ON

F
l
C
D
is
actuated
increase

engine

speed
slowly
then
decrease
it
And

make

sure
throttle
valve

operates

Click
sOund
is
heard
or

continuity

turns
to
OFF
when

engine
speed

decreases
to

idling

If
not

adjust
throttle
valve
switch

Fig
EF

59

Adjusting
Throttle

Valve
Switch
Eng
ine
Fuel

If
throttle
valve
switch
cannot
be

adjusted
to

specification
replace

Engine
operation
Throttle
valve
switch

continuity
Engine
speed

rpm

When

engine
speed

increases
OFF
ON
1
150

t200

When

engine
speed

decreases
ON

OFF
I
000
t
200

Inspecting
engine
revolution

switch

Note
Before

checking
the

engine

revolution
switch

make
sure

the

functions
of
other

components
are

correct
in
accordance

with
the

items

described
above

Disconnect
throttle
valve

switch

connector
2
Connect
circuit
tester

3
Run

engine
at

idling
speed

4

Depress
clutch

pedal
and
shift

gear
into
5th

position

5

Depressing
clutch

pedal
increase

engine
speed
slowly
Make

sure

engine

speed
is
within
the

specified
range

when
voltmeter

goes
from
OV
to
l2V

Then
decrease

engine

speed
slowly

and
make

sure

engine
speed
is
within

the

specified
range
when
voltmeter

goes
from
12V

to
OV

EF
23
MAJOR
SERVICE

OPERATION

The

perfectly
adjusted
carburetor

deliver
the

proper
fuel
and
air
ratios

at
aD

speeds
for
the

particular
engine

for
which
it

was

designed
By
com

pletely
disassembling
at
re
ular
inter

vals
which
will
allow

cleaning
of
all

parts
and

passages
the
carburetor
can

be
maintained
in
its

original
condition

and
will

continue
to
deliver
the

proper

ratios

To
maintain
accurate
carburetion

of

passages
and

discharge
holes
ex

treme
care
must
be
taken
in

cleaning

Use

only
carburetor
solvent
and

compressed
air

to
clean
all

passages

and

discharge
holes
Never

use
wire

or

other

pointed
instrument
to
clean
or

carburetor
calibration
will
be
affected

REMOVAL

Remove
carburetor
from

engine

taking
sufficient

care
to
the

following

Precautions

a
When

disconnecting
fuel
lines
do

not

spill
fuel
from
fuel

pipe

b
When

removing
carburetor

do
not

drop

any
nut

or
bolt
into

intake

manifold

c
Be

careful
not
to
bend
or
scr
tch

any

part

d
Link

system
of
carburetor
differ

between
models
for
U
S
A

and

Canada
For
details
see

Figure
EF

60
which
is
based
on
Canadian

models

FU
model
Engine
Fuel

If

@
Choke
chamber

@
Ceo
ter

body

@
Throttle
chamber

1
Dash

pot

2
An
tomatic
choke

cover

3
Automatic
choke

body
and

diaphragm

chamber

4

Throttle
valve
switch

assembly

5
Throttle

valve
switch

adjust
screw

6
Fast
idle

adjust
screw

7

Secondary
slow

jet
EF567A

8

Secondary
small
venturi

9

Primary
small
venturi

10
Power
valve

11

Secondary
main
air

bleed

12

Plug

13

Primary
main
air
bleed

14

Plug

15

Injector
weight

16

Primary
slow
air
bleed

17

Accelerating
pump

18
Needle
valve

19

Plug
20

Primary
slow

jet

21
Float

22
Anti
dieseling
solenoid

valve

23

Secondary
main

jet

24

Primary
main

jet

25
Idle
limiter

cap

26
Idle

adjust
screw

27
Throttle

adjust
screw

28
Vaeuum
screw

29

Primary
and

secondary
throttle

valves

Note
Do

not
remove
the

parts
muked

with
an

utemk

Fig
EF
61
Carburetor

EF
25

Engine
Fuel

Dhassembly

1

Properly
fitting
wrenches

and

screwdrivers
must
be

used
on
the

nozzles
and

jets
as

well
as
on
the
screws
arid
nuts
and
cafe
must
be

exercised
not
to

damage
any
parts

2

Clean
the
carburetor
thoroughly

before
disa
lSembly

Choke
chamber

parts

Except
FU
model

@

FU
model
3
Do
not

attempt
to
remove

any

parts
marked
with
an
asterisk

Servo

diaphragm
of

throttle

opener

2

Automatic
choke

cover

3
Dash

pot

4

S

pring
hanger

S
Automatic

chl
ke
body
and

diaphragm
chamber

6
Choke
valve

7

Pump
lever

retufn

sprina

8

Accelerating
pump
lever

9

Accelerating
pump
lever

shaft

10

Accelerating
pump
dust
cover

11

Accelerating
pump

12

Primary
slow
air

bleed

13
Needle
valve

14
Float

IS
Stroke
limiter

Notc
Do
Dot
remove

the

parts

marked
with
an

asterisk

EF085A

CHOKE

CHAMBER
PARTS

1

Dash

pot

2

Automatic
choke
cover

3
Automatic
choke

body
and

diaphragm
chamber

4

Throttle
valve
switch

assembly

S

Primary
slow

air
bleed

6
Needle
valve

7

Float

EF

26
EF086A

Fig
EF

62
Chohe

Chamber

Engine
Fuel

Choke
chamber

parts

FU

model

Except

FU
model
R

5

7

@

l
i

1

I
ft

Y

mJ

r

ft
1
@

@

1

EF421A

Tl@@

EF568A

EF
27
1

Secondary
slow

jet

2

Plug

3
Power
valve

bleed
d
mam
au
4

Seeon

ary

bleed
P

imary
maID
aIr

5
r

ight
6

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