1979 DATSUN 210 check engine

35
to
45

pm

Automatic
transmission

in
60

position

10
to
20

pm

FU
model

60
to
70

rpm

13

I
Remove

cap
and
connect
air

hose
to
air
check
valve

Except

Canada
and
FU
models

2
Remove

cap
and
connect

air

hose
to
air

induction

pipe
Canada

and
FU
models

If

engine
speed
rises

readjust
it

to

the

specified
speed
with

throttle
ad

justing
screw

Note
Check
throttle
return

spring
for

CI3cks

squareness
or
deformation

if

necessary

replace
with
a
new

one

14
On
FU
models

proceed
as

follows

Open
throttle
valve

by
turning

throttle
shaft
then
close
it
And

make

sure
throttle
valve
switch
of
fuel
shut

off

system
operates
click
sound
is

heard
or

continuity
turns
to
OFF

when
throttle
valv

is
closed

If

not

adjust
throttle

valve
switch

In
air

conditioner

equipped
models

inspection
in

step
13
should
be

carried
out
when

engine
is

running

with
air

conditioner
in
ON

F
I

C
D
is

actuated

Refer
to

Checking
Fuel
Shut
off

System
in
this
section

Idle
limiter
cap

Do

not
remove
this
idle
limiter

cap

unless
necessary
If
this
unit
is
re

moved
it
must
be

readjusted
at
the

time
of

reinstallation
To

adjust

proceed
as
follows

I
After

adjusting
throttle
or
idle

speed
adjusting
screw
check
to

be
sure

that
the
amount
of
CO

contained
in

exhaust

gases
meets
the
established

standard

2

Install
idle
limiter

cap
in

position

making
sure
that
the
adjusting
screw

can
rotate
another
1
8
turn
in
the

CO
RICH
direction
Engine
Tune

up

CO
rich

l
8

rotation

CO
lean

ISo

Idle
limiter

cap

ET031

Fig
ET
16

Setting
of
Idle
Limiter

Cap

CHECKING
CHOKE

MECHANISM
Choke

plate
and

linkage

I

Check
choke

valve
and
mecha

nism
for
free

operation
and
clean
or

replace
if

necessary
A

binding
can

result
from

petroleum
gum
formation

on
choke
shaft
or
from

damage

2
Sefore

starting
engine
fully
de

press
accelerator

pedal
to
ensure
that

choke
valve
closes

properly

3

Push
choke
valve
with
a

finger

and
check
for

binding

4
Check
to
be
sure
that
bi
metal

cover
index
mark
is

set
at
the
center

of

choke

housing
index

mark
as

shown

below

Note
Do

not
set
bi

metal
cover
index

mark
at

any
position

except
the

center
of
choke

housing
index

mark

tfljlL
L

i

05

1
Hi
metal
cover

2
Choke

housing
ind
x
marks

3
Hi
metal
cover
index
mark

ET034

Fig
ET
17

Bi
metal
Setting

ET
9
CHECKING
FUEL

SHUT
OFF
SYSTEM

FU
models

Precautions

a
Before

checking
make
sure

engine

is

warmed

up
and
choke

valve
is

fully
open

b
On
air
conditioner

equipped
mod

els

turn
off
air

conditioner
switch

in

steps
I

through
S

Idle

engine

2

Disconnect
anti

dieseling
solenoid

valve

connector
and
make

sure
that

engine
stops
If
not

replace
anti

dieseling
solenoid
valve

assembly

Fig
ET
18
Checking
Anti

dieseling

Solenoid

for
Function

FU

models

3

Connect
anti
dieseling
solenoid

valve

connector

4

Restart

engine

S

Increase

engine
speed
slowly

under
no
load
and
make

sure

engine

speed
is

within
the

specified
range

when
throttle
valve

switch
is

operated

Operation
of
throttle

valve
switch

is

judged
by
hearing
Click
sound

caused

by
microswitch

inside
throttle

valve

switch
Then
decrease

engine

speed
slowly
and

make
sure

engine

speed
is
within
the

specified
range

when
throttle

valve
switch
is

operated

If

not
adjust
throttle
valve
switch

6
In
air

conditioner

equipped
mod

els

proceed
as
follows

1
Check
F
1

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

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

Engine
Tune

up

EMISSION
CONTROL
SYSTEM

CHECKING
VACUUM

FITTING
HOSES

AND
CONNECTIONS

Check

fittings
and
hoses
for

ioose

cqnriections
or

damage
Retighten
loose

parts
or

replace
parts
that

are

not

suitable
for
further
use

California
model
FU
model

w

fl11r
o

Intake
manifold

Non
California

model
q

Canada

model

@

T

J
I

M
T

r
T
r
o

p
1
o

1
J

1
Distributor

2
Throttle

opener
vaaJ
um
control
valve

3
From

3
way
connector
to
air
cleaner

4
Throttle
opener
servo

diaphragm

5
Vacuum

switching
valve

6
Thermal
v3roum
valve
7

Vacuum
motor

8
From
vacuum

motor
to

temperature
sensor

9
Carburetor

10
From
idle

compensator
to
intake
manifold

11
To
A
B
valve

12
Vacuum
d

lay
valve
@

@

@

@

@
B
P
T
valve

C
A
C
valve

E

G
R
control
valve

A
B

valve

Carbon
canister
M
T

l

Q2
A
T

ET502

Fig
ET

22
Vacuum
Hoses
and
Connections

ET
11

R
EPIACING
AIR

PUMP
AIR

CLEANER
FILTER

Except
FU
models

and
Canada
models

When

replacing
air
cleaner
filter

remove
ir

cleane

frO
ho

od

legge

and
detach
lower

body
and
filter
as
an

assembly

ET530

Fig
ET
23

Replacing
Air
Cleaner

Filter

REPI
ACINGAIR

INDUCTION
VALVE

FILTER

FU
models

and
Canada
models

Remove

screw

securirtg
valve

to
air

cleaner
Air
induction
valve
fIlter
can

be
taken

out
easily
Replace
fIlter

periodically
in
accordance
with
main

tenance
schedule

2

C

l
11
l

r
r

EC9

Fig
ET

24
R

pklcing
Air
Induction

Value
Filter

REPLACING
P
C
V

VALVEANb
FILTER

I
Check
P

C
V
valve
as
follows

With

engine
running
at
idle
remove

the
ventilator
hose
from
P

C
V

valve

if
the
valve
is

working
a

hissing
noise

will
be
heard
as

air

passes
through
the

valve
and

a

strong
vacuum
should
be

felt

inunediately
when
a

finger
is

placed
over
valve
inlet
Engine
Tune

up

2

Replace
P
C
V
Valve
and
filter
in

accord
with
maintenance

schedul

ET531

Fig
ET
25
Replacing
P
C
V
Value

and
Filter

CHECKING

VENTILATION
HOSES

I
Check
hoses
and
hose
connec

tions
for
leaks

2
Disconnect
all
hoses
and
clean

with

compressed
air

If

any
hose
cannot
be

free
of

obstructions

replace

Confirm

that
flame
arrester
is
locat

ed

correctly
in
hose
between
rocker

cover
and
air
cleaner

ET277

Fig
ET
26

Cleaning
Ventilation
Hose

ET

12
CHECKING
VAPOR

LINES

I
Check
all
hoses
and
fuel
tank

flller

cap

2
Disconnect
vapor
vent
line
con

necting
carbon
canister
to
fuel
tank

3
Connect
3

way
connector
mana

meter
and

cock
or

equivalent
3
w

y

charge
cock
to
end
of
vent
line

ET532

Fig
ET
27
Vent
Line

4

Supply
fresh
air
into

vapor
vent

line

through
cock
little
by
little
until

pressure
become

400

mmH20
is
75

inH20

5
Shut

cock
completely
and
leave
it

unatiended

6
After
2
5
minutes

measure
height

of

liquid
in
manometer

7
Varilllion
in

height
should
remain

with
25

mmHp
0
98

inH20

8
When
filler

cap
does
not
close

completely
height
should

drop
to
zero

ih

a
short
time

9
If

height
does
not

drop
to
zero
in

a
short
time
when
filler

cap
is
re

moved
it
is

cause
of
a

stuffy
hose

Note
In
case
vent
tine
B

stuffy

breathing
in

fuel
tank
is
not

thoroughly
made
thlis

caming
in

sufficient
delivery
of
fuel
to

engine

or

vapor
lock
It
must
tberefore
be

repaired
or

replaced

3

way
connector

ck

Air

Manometer

@

Carbon
canister
Engine
Tune

up

400
mmH20
15
75
in

H20

Check
valve

r
F

uel
filler
cap
with

vacuum
relief
valve

1

Fig
ET
28

Checking
Evaporatiue
Emiuion
Control

System
EC091A

CHECKING
FUEL

TANK
VACUUM

RELIEF
VALVE

Remove
fuel
filler

cap
and
see
it

functions

properly

I

Wipe
clean
valve

housing
and
have

it
in

your
mouth

2

Inhale
air
A

slight
resistance
ac
companied
by
valve

indicates
that

valve
is
in

good
mechanical
condition

Note

also
that

by
further

inhaling
air

the
resistance
should
be

disappeared

with
valve

c
ks

3

If
valve
is

clogged
or
if
no
resist

ance
is
felt

replace
cap
as
an
assem

bled
unit

ET
j3
D

o
0

o
0

o
0

ET500

Fig
ET
29
Fuel
Filler

Cap
with

Vacuum

Relief
Value

REPLACING
CARBON

CANISTER
FILTER

Check
for
a
contaminated
fJlter

Filter
can
be
removed
at
the
bot

tom

of
canister
installed
on
car

body

2

Replace
fJlter
in

accordance
with

maintenance
chedule

EF201

Fig
ET
30

Repfucing
Carbon
Canister

Filter

Engine
Tune

up

TROUBLE
DIAGNOSES
AND

CORRECTIONS

Condition
Probable

cause

CANNOT
CRANK

ENGINE
OR

SLOW

CRANKING
Improper
grade
oil

Discharged
battery

Faulty
battery

Loose
fan
belt

Malfunction
in

charge
system

Wiring
connection

loose
in

starting
circuit

F

ul1Y
ignition
switch

Faulty
starter
motor

Trouble
shooting

procedure
on

starting
circuit

Switch

on
the

starting
motor
with

light
ON

WheJlIJght
gOO
off
or

Ii
J1S
considerably

a
Check

battery

b
Check

connection
and
cable

c
Check
starter
motor

When

light
stays
bright
Corrective
action

Replace
with

proper
grade
oil

Charge
battery

Replace

Adjust

Inspect

Correct

Repair
or
replace

Repair
or

replace

a
Check

wlflng
connection

between

battery
and
starter

motor

b
Check

ignition
switch

c
Check
starter

motor

ENGINE
WILL
CRANK

NOR
LLY

BUT

WILL
NOT
START

In
this
case
the

following
trouble

causes

may
exist
but
in

many
cases

ignition
system
or
fuel

system
is
in

trouble

19
ition

syst
m
in
trouble

FII
1

system
in
trowb

Val
mechanism

do
not

work

properly

Low

compression

Trouble
shooting

procedure

Check

spark
plug
firstly
by
following
procedure

Disconnect

high
tension
cable
from

one

spark
plug
and
hold
it

about

10
mm

0
39
in
from
the

engine
metal

part
and
crank

the

engine

Good

spark
occurs

a
Check

spark
plug

b

Checkignition

timing

c
Check
fuel

system

d
Check

cylinder

compression

Check

the
current
now
in

primary
circuit

Very

high
current

Inspect
primary
circuit
for
short

Check
breaker

point
operation

except
tran

sistor

ignition

system
No

spark
occurs

ET
l
6

Engine
Tune

up

Condition
Probable

cause

Low

or
no

current

Ignition
system
out

of

order
Burned
distributor

point

Improper
point

gap

Faulty
condenser

Leak
at
rotor

cap
and
rotor

Faulty
spark
plug

Improper
ignition
timing

Faulty
ignition
coil

Disconnecrion
of

high
tension
cable

Loose
connection

or
disconnection
in

primary
circuit

Lack
offuel

Dirty
fuel

filter

Dirty
or

clogged
fuel

pipe

Fuel

pump
will
not
w0rk

properly

Carburetor
choke
will
not
work

properly

Improper
adjustment
of
float
level

Improper
idling

Dirty
or

clogged
carburetor

Clogged
breather

pipe
of
fuel
tank

Malfunctionin

g
anti

dieseling
solenoid
valve

Malfunctioning
fuel
shut
off
system
FU

models

Incorrect

spark
plug
tightening
or

faulty

gasket

Improper
grade
engine
oil
or
low

viscosity

Incorrect
valve
clearance

Compression
leak
from
valve
seat

Sticky
valve
stem

Weak
or

damaged
valve

springs

Compression
leak
at

cylinder
head

gasket

Sticking
or

damaged
piston
ring

Worn

piston
ring
or

cylinder

Trouble
looting
procedure

Pour
the

engine
oil
from

plug
hole
and
then
measurt

cylinder
compression
Fuel

system
out
of

order

Low

compression

Compression
increases

Compression
does
not

change

ET
17
Corrective
action

Check
for
loose
terminal
or
disconnection
in

primary
circuit

Check
for
burned

points

Repair
or

replace

Adjust

Replace

Clean
or

replace

Clean

adjust
plug

gap
or

replace

Adjust

Replace

Replace

Repair
or

replace

Supply

Replace

Clean

Repair
or

replace

Check
and

adjust

Correct

Adjust

Disassemble
and
clean

Repair
and
clean

Check
for
loose

terminal
or
wire

harness

Check
fuel
shut
off

system
Adjust
or
re

place
if

necessary

Tighten
to

normal

torque
or

replace

gasket

Replace
with

proper
grade
oil

Adjust

Remove

cylinder
head
and

lap
valves

Correct
or

replace
valve
and
valve

guide

Replace
valve

springs

Replace
gasket

Replace
piston
rings

Overhaul

engine

Malfunctiong
cylinder
or
piston
ring

Compression
leaks
from
valve

cylinder
head

or
head

gasket

Condition

IMPROPER
ENGINE

IDLING

Fuelsystam
out
of

order

Low

1
ion
Engine
Tune

up

Probable
cause

Clogged
or

damaged
carburetor

jets

Incorrect
idle

adjustment

Clogged
air
cleaner
filter

Damaged
manifold

gaskets
or
carburetor

insulator

bnproper
float
level

adjustment

LoOse
air
hoses

or
air
fuel
mixture

hoses
of

carburetor

Malfunctioning
carburetor
choke

Malfunctioning
anti

backfire
valve

Malfunctioning
automatic

temperature
con

trol
air
cleaner

Inoperative
idle

compensator

Carbon
canister

purge
line
hose

damaged
or

disconnected

Stick
E
F
E
v

ve
shaft

Othen
Incorrect
valve
clearance

Extremely
low
revolution

Malfunction
of

the

ignition
system
spark

plug
high
tension
cable

ignition
coil
etc

incorrect
basic

ignition
timing

Malfunction
of

chol
e

valve
or

linkage

Malfunction
of

vacuum
motor

sensor
or

hoses
of

air
cleaner

Incorrect
idle

adjustment

Cloged
air
cleaner

fIIter

Malfunction

of
idle

compensator
of

air

cleaner

Malfunction
of
E
G
R

control
valve

Loose
manifold
and

cylinder
head
bolts

Higli

engine
idle

opem
Dragged
accelerator

linkage

Incorrect
idle

adjustment

Malfunction
of

T
O

C
s

system
or
tluottle

opener
Except
FU
models

Malfunction
of

speed
switch
and
harness

Except
FU
models

ET

18
Corrective
action

Clean
or

replace

Adjust

Replace
element

Replace
gasket
or
insulator

Adjust

Check
for
loose
connections

Check

lUId
adjust

Check
for
loose
connection

of
vacuum
hose

Check
A
I

C
air

cleaner

Check
for
connection

of
idle

compensator

hose
or

replace
idle

compensator

Connect
or

replace

Repair

Previously
mentioned

Adjust

Adjust

Replace

Adjust

Adjust

Check
for
loose
hoses

Replace
system
com

ponentsif
necessary

Adj
lSt
idle

speed

Replace
air

cleaner
filter

Replace

Clean
or

replace

Retighten
bolts

Check
ahd
correct
accelerator

linkage

Adjust
idle

speed

Check
for
loose
vacuum
hose
and
harness

connections

Adjust
replace
if
necessary

Check
for
loose
connections

Repair
or

replace
if

necessary