1979 DATSUN 210 ECU

E
G
R
passage
arid
taibe

I

E
G
R

tube
can
be
removed

by

loosening

securing
nuts

2

Disconnect

blow

by
gas
hose
and

remove

securing
bolts
and

nuts
E

G
R

passage
can

then
be
taken

out

3

Installation
is
in
the

reverse
se

quence
of
removal

EC158A

Fig
EC
S9

Removing
E
G
R

Passage

Note

New

gasket
should

be
used
in

installing
E

G
R

passage

Thermal
vacuum
valve

The
thermal

vacuum
valve
is

made

of

plastic

Consequently
pay
attention

not
to

give
damage
to
it

On
U
s
A

models

except
for

the

FU

model
the
3

port
type
thermal

vacuum

valve
is
located
on
the

rear

end

of
the

cylinder
head

On
Canada
and

FU
mode
the

valve
is

located
on

the
front
end
of
the

cylinder
head
Emission

Corltr
ol

System

I
Drain

engine
coolant
about
one

liter

I
US

qt
Imp
qt

2

Remove
manifold
nut

securing

heat

shield

plate

I
I

LIkat
shield

plate

EC170A

Fig
EC

70

Removing
Heat
Shield

Plate

3
Disconnect
two

vacuum
hoses

and
unscrew
the
thermal
vacuum

valve
The
valve

can
then
be
taken
out

4

Installation
is
in
the

reverse
se

quence
of
removal

Note

a

Be
sure
to

apply
sealer
to
threads
of

the
valve

prior
to

installing
new

wive

b
When

installing
new

thermal
vacu

um
wive
make

sure
it
is

black

t
J

Tightening
torque

Thermal

vacuum
valve

Less
than

2
2

kg
m
16
ft
b

Manifold
nut

1
5
to

2
0

kg
m

11

to
14
ft
b

EC
24
2

port

type

3
port

type

Fig
EC
71

Removing
Thermal

Vacuum
Valve

B
P
T
valve

I

Remove

vacuum
tube
on
the

B
P
T

valve

2

Remove

screws

securing
B
P
T

valve
to

bracket

3
Disconnect
back

pressure
tube

from

B
P
T
valve

The
B
P
T

valve
can
then
be

taken

out

EC770

Fig
EC

72

Removing
B
P

T
S

curing

Screws

4

Installation

is
in

the
reverse
se

quence
of

removal

Note
In

replacing
the
B
P
T

valve

with

new
one
h
that
the

type
number
on

new

part
is
the

same
85
that
on
former

one

Vacuumswltching
valve

The
vacuum

switching
valve

changes
the

vacuum

passage
by
the

electrical
signa

The
solenoid
installed
in
the
valve

moves
the
needle

valve
and
controls

vacuum
signal
in

order
to

change
the

vacuum
advance

I
c

III

J

IL
jll
J

EC164A

Fig
EC
82
Vacuum

Switching
Valve

Thermal
vacuum
valve

3

port
type

U
S
A
modele

except

FU
model

The
thermal
vacuum
valve
detects

engine
cooling
water

temperature
and

controls
the
vacuum
signal
for
distrib

utor
vacuum
advance
mechanism

This
3

port
type
thermal
vacuum

valve
is

a
2

stage
action

type

That
is

when
the
water

temperature
is
too

low

or

high
the
acuum
signal
is
transmit

ted
to
the
distributor

ffi2
To
air

cleaner

From
B
PT

valve

From
distributor

EC156A

Fig
EC
83
Thermal
Vacuum
Valve

3

port
type

Top
detecting
switch

For
M
T
models

The

top
detecting
switch
for
M
T

models
is
located

on
the
side
face
of

the
transmission

gear
box

A

plunger
of
the
switch
detects
the

position
of
the

striking
rod
and
Emission
Control

System

changes
the

continuity
between

two

lead
wires

EC165A

Fig
EC
84

Top
Detecting
Switch

Top
detecting
switch

For
Celifornla
AfT
model

The

top
detecting
switch
for

Arr

models
is

installed
as
a

plug
for
t
e

governor
feed
line

pressure
take
out

port
for
service

This
switch
detects
the
line

pressure

for
the
band

servo
release
side
and

front
clutch
and

changes
the
continui

ty
between
lead
wires
to
the

switch

body

EC166A

Fig
EC
85

Top
Detecting
Switch

AfT
model

Vacuum

delay
valve

The
vacuum

delay
valve
prevents
a

rapid
vacuum

change
in
the
distributor

vacuum
advance
line
This
valve
is

designed
for

one

way
operation
and

consists
of
a
one

way
umbrella
valve

and
a

sintered
steel
fluidic
restrictor

B

P
T
valve
side

J

l

1

Sintered
metric
disc

2
One

way
unbreUa
valve

EC860

Fig
EC
86
Vacuum

Delay
Value

EC

29
In
line
orifice

Some
orifices
are
installed
in
the

midway
at

the
vacuum
line
The
size

of
the

orifice
is

important
to
control

vacuum
advance

Therefore

pay
attention

not
to
lose

them

and
install
a

proper
part
when

replacing

Orifice

EC167A

Fig
EC
87
In
line

Orifice

REMOVAL
AND

INSTALLATION

f
Vacuum

switching
valve

The

vacuum

switching
valve
is

located
on
the

rear
end
of
the

intake

manifold

I
Disconnect

a

pair
of

lead
wires

from
valve
and

two
rubber
tubes

2
Loosen
two

screws

securing
valve

to
intake
manifold

Vacuum

switching

valve
can
then
be
taken
out

3
Installation
is
in
the
reverse

s

quence
of

removal

EC16BA

Fig
EC
88

Removing
Vacuum

Switching
Valve

Top
detecting
switch

For
M
T
models

The

top
detecting
switch
is

located

on
the

side
face
of

the
transmission

gear
box

I
Disconnect

a

pair
of
lead
wires

2
Unscrew
the
switch

body
itself

The

switch
can
then
be
taken

out

3

Installation
is
in
the
reverse
se

quence
of
removal

dl
Tightening
torque

Top
cietectingswitch

2
0
to
3
0

kll
m

14
to
22

fHbl

@

EC892

Fig
EC
89

Remouing
Top

Detecting

Switch

Top
detecting
switch

For

AfT
models

The

top
detecting
switch
is

installed

on
the
side
face
of
the

gear
box

I

Disconnect
a
lead
wire

for

top

switch

2

Loosen
switch
itself

Switch
can
then
be
taken
out

Note

When
the

switch
is

remo
ed

automatic

transmission
fluid

flows

out

Prepare
some

rugs
to

prevent
the

fluid
rom

flowing
out

EC169A

Fig
EC
90

Remouing
Top

Detecting

Switch

An
models

3

Insta
tion

is
in

the
reverse
se

quence
of

removal
Emission
Control

System

dl
r

ingtorq

Top
detecting
switch

2
0
to
3
0

kll
m

14

to
22
ft

bl

Thermal
vacuum
valve

3

port
type

The

thermal
vacuum
valve
is
instal

led

on
the
rear
end
of

the

engine

cylinder
head

I

Drain

engine
coolant
about

one

liter

lUllS
qt
Ulmp
qt

2

Remove
manifold

nut

securing

heat
shi
eld

plate

r

l

EC170A

Fig
EC
91

Remouing
Hoot
Shield

Pwte

3
Disconnect
3
vacuum
hoses
and

unscrew
valve

itself
Valve
can
then
be

taken
out

4
Install

thermal

vacuum
valve
in

the

reverse

sequence
of

removal
At

this
time

the
valve
should
be

tighten

ed
to

a
tilt

angle
of
300

Note
Be
sure
to

apply
oealer
to

threads
o
the
valve

prior
to
instal

ling
new

valve
t
J
T1g11taning
torqUe

Thermal

cuum
waive

Less
than

2
2

kll
m
16
ft

bl

Manifold
nut

1
5

to
2

0kg
m

11
to
14
ft

bl

From
distributor

From
B
P
T

valve

From
air
cleaner

ECl71A

Fig
EC

92

mtalling
Thermal
Vacuum

Value
3

port
type

Vacl
ul11

delay
valVe

The
vacuum

delay
Valve
is

installed

on
the

midway
o
the
vacuum
tube

between

the
carburetor
and
distributor

vacuum
advance
mechanism

In

installing
the
valve
make
sure

that
the
brown
face

sid
is
connected

to
the
carburetor

side

Carburetor
sid

C
r

i

J

EG
30
Distributor

side

One
way

umbreDa
valve

Sintered
metal
disc

EC277

Fig
EC
93
In

tolling
Vacuum

Deloy
Value

REMOVAL

AND

INSTALLATION

I

Jack

up
the

car

Note

Apply
parking
brake
and

place
wheel

chocks

2
Remove

screws

securing
lower

shelter
of

catalytic
converter

Loosen

flange
bolt

connecting

catalytic
converter
to

front
and

rear

exhaust
tube

Catalytic
converter

assembly
can

then
be
taken
out

3

Installation
i
in
the

reverse
se

quence
of
removal

CAUTION

a
Be

careful
not
to

damage
catalytic

co
when

handliilg

b
Never
wet

catalyzer
with
water
oil

etc

t
J

Tightening
torque

Catalyti
converter
bolts

2
6
to
3
4

kg
m

19
to
25
ft
lb
Emission
Control

System

EC075A

EC076A

Fig
EC
103

Removing
Catalytic

Converter

INSPECTION

PrelimInary
In
pectlon

Vi

ually
check
condition
of
all

component

parts
including
hose

tubes
and
wires

replace
if

necessary

Refer
to
Air

Injection

System
for

inspection

EC
34
Catalytic
converter

Whether

catalytic
converter
is

nor

mal
or
not
can
e

checked

by
ob

serving
variation
in
CO

percentage

The
checking

procedure
is

as
follows

Apply
parking
brake
Shift

gears

into

Neutral
for
manual
transmis

sion

and
N
or

P
for

automatic

transmission

position

I

Adjust
engine
idling

speed
and

CO

percentage
Refer
to

Adjusting

Carburetor
Idle
RPM
and

Mixture

Ratio
for

adjustment

2
Race

engine
1
500

to
2
000

rpm

two
or

three
times

under
no
load
and

make
sure

that

specified
CO

percent

age
obtained

3
Remove

cap
and
connect

air
hose

to
air

check
valve

If

idling
speed
increases

readjust

it
to

specified
speed
with
throttle

adjusting
screw

4

Warm

up
engine
for
about
four

minutes

at
2
000

pm
under
no
load

S

Measure

Ci
percentage
at

idling

speed
After

stepAhas
been

complet

ed
wait
for

one
minute
before

making

CO

percentage
measurement

6
If
CO

percentage
measured
in

step
5
is

less
than
0
3
the

catalytic

converter

is
normaL

7

If
CO

percentage
measured
in

step
5
is

over
0
3
recheck
AJ
S
and

1

replace
air
check
valVe

The
perform

inspection
steps
4

and
S

8

If
CO

percentage
is

still
over
0
3

in

step
7

catalyt
iC

converter
i

mal

functioning
Replace
catalytic
con

verter

Emission

Control

System

SERVICE

DATA
AND

SPECIRCATIONS

INSPECTION

AND
ADJUSTMENT

AIR
PUMP

Air

pressure

With

engine
speed
at
2
600

pm
mrriHg
inHg
More
than
100
3
94

E
G
R
SYSTEM

Thermal
vacuum
valve

opening

temperature

U
S
A
models

except
FU

model

FU
and

Canada
models
Oc
OF

oC
F
SO
to
63
122
to
145

40
to
63
104

to
145

T
C
S

SYSTEM

Thermal
vacuum
valve

Except
Canada
and
FU
models

Closing

temperature
oC
F

Opening

temperature
OC

F
Above
SO
to

63

122
to
145

Below
5
to
18
41
to

64

5

to
18
and
SO
to

63

41
to

64
and
122
to
145

TIGHTENING

TORQUE

Air

pump

Bea

ring
cover

securing
bolt

Rotor

ring
screw

End
cover

bolt

Pulley
securing
bolt

Thermal
vacuum
valVe

BP
T
valve

mounting
sere

Top
detecting
switch

Catalytic
converter
bolt
kg
m

ft4b

kg
m

ft
lb

kg
m

ft
Ib

kg
m

ft
b

kg
m

ft
lb

kg
m
ft
Ib

kg
m

ft
Ib

kg
m
ft
lb
0
1
to

0
2
0

7
to
1
4

0
5
to

0
7
3

6
to
5
1

0
7
to
0
9
5
1

to
6
5

0

75
to
0

90
5
4
to
6
5

Less
than

2
2

16

0
38
to
0
51
2
7
to

3
7

2

0
to

3
0
14
to
22

2
6
to
3
4
19
to
25

EC
38

CHARGING

If

electrolyte
level
is

satisfactory

battery
must
be

charged
when
electro

lyte
gravity
reading
falls
below
1
20
or

1
22

NS70
If

battery
on

car
is

quick
charged
to

bring
it

up
to
full

charge
the

operation
should
be

carried

out
with

negative
cable
removed

Prior
to

charging
corroded
termi

nals

should
be
cleaned
with

a
brush

and
common

baking
soda
solution
In

addition
the

following
items
should

be
observed
while

battery
is

being
Engine
Electrical

System

charged

I
Be

sure
that

electrolyte
level
is

above

top
of
each

plate

2

Keep
removed

plugs
in

a
safe

place

3
Do
not
allow

electrolyte
tempera

ture
to

go
over
4SoC
1130F

4
After

charging
check
to
be

cer

tain
that

specific
gravity
does

not

exceed
maximum

charging
specific

gravity
at

20
C
680F

Correction

can
be
made

by
adding
distilled
water

into

cells
as

necessary

5

Keep
battery
away
from

open

EE
3
flame
while
it
is

being
charged

6

After
all
vent

plugs
have
been

tightened
clean
all

sprayed
electrolyte

off

upper
face
of

battery

INSTALLATION

1
InstaU
and

tighten

clamps
secure

ly

2
After

clamps
have
been

tightened

clean

battery
cable
terminals
and

apply

grease
to

retard
formation
of

corrosion

REMOVAL
AND

INSTALLATION

Disconnect

battery
ground
cable

Disconnect
harness

connector
and

battery
cable

at

magnetic
switch

2
Remove

bolts

securing
starting

motor
to
transmission

case
Pull

start

iog
motor

forward
and

remove
it

3
Inst
1I

starting
motor
in

reverse

order
of

removal

DISASSEMBLY

NON
REDUCTION
GEAR

TYPE

I
Disconnect

connecting
plate
from

M

terminal
of

magnetic
switch
Re

move
two

screws

securing
magnetic

switch
and
remove

magnetic
switch

assembly

2
Remove

dust
cover
E

ring
and

thrust
washer
s

EE311
@@

O

Fig
EE

8
Removing
DUll
Cover

E

ring
and
ThrUJJt

Washer

3
Remove
two
screws

securing

brush
holder

assembly

EE318

Fig
EE

9
Removing
Bru
h
Hold

Setacrews
Engine
Electrical

ystem

4
Remove
two
ihrough
bolts
and

rear
cover

5
Remove

brushes
from
their

hold

er

by
moving
each
brush

spring
away

from
brush
with
a
hook

Remove

brush
holder

6
Remove

yoke
assembly
and
with

draw

armature
assembly
and
shift

lever

7
Remove

pinion
stopper
located
at

the
end
of
armature
shaft
To
remove

stopper
first
move

stopper
toward

pinion
and
after

removing
stopper
clip

remove

stopper
with

overruniling

clutch
assembly
from
armature
shaft

EE271

Fig
EE

lg
Rf

moving
Pinion

Stopper

REDUCTION
GEAR
TYPE

1

Disconnect

connecting
plate
from

M
terminal
of

magnetic
switch
Re

move
two
screws

securing
magnetic

switch
and
remove

magnetic
switch

assembly

Note

Torsion

spring
can
be

pulled
off

magnetic
switch

2
Remove

through
baIts
and
rea

cover

Note

Rear
cover
can
be

pried
off
with

a
f1at
blade
screwdriver
inserted
be

tween
it

and

yoke
Be

careful
not

to
damage

packing
while

removing

reaf
cover

3
Remove

yoke
armature
and

brush
holder
as

an
assembly
from

center

housing

CAUTION

When

removing
be
careful
not
to

knock
brush
commutator
or
coil

against
any
adjacent
part

EE
6
o

7

EE615

Fig
EE
ll

Removing
Yo
and

Armature

4
To

remove
brush
holders

proceed

as
follows

I
Remove

brush
on

positive
side

from
its
holder

Note
Brush
on

positive
side
differs
in

that
it
is
isolated
from
brush
holder

and
its

lead
wire
is
connected
to

field
coil

2

Carefully
lifting
brush
on

nega

tive
side

away
from
commutator
sur

face
remove
it

from
brush
holder

EE616

Fig
EE
12

Removing
Br
h

5
Remove
bolts

securing
center

housing
to

gear
case
and
detach
center

housing

6
Remove

pinion

gear

CLEANING
AND

INSPECTION

Clean

all
disassembled

parts
but
do

not
use

grease
dissolving
solvents
for

cleaning
overrunning
clutch
armature

assembly
magnetic
switch

assembly

and
field
coils
since
such
a

solvent

would
dissolve

grease
packed
in
clutch

mechanism
and
would

damage
coils
or

other
insulators

Check
them
for
excessive

damage

or
wear
and

replace
if

necessary

REMOVAL

1

Disconnect

battery

negative

cable

2

Disconnect
two

lead
wires
and

oonnector
from
alternator

3

Loosen

adjusting
bolt

4

Remove
alternator
drive

belt

5

Remove

parts
associated
with

alternator
from

engine

6
Remove
alternator

from
car

DISASSEMBLY

I
Remove

through
bolts

Separate

front
cover
with
rotor

from
rear
cover

with
stator

by
lightly

tapping
front

bracket
with
a

wooden
mallet

rnJ

J

i

EE525

Separating
Front

COI
T

Fig
EE

31

2

Place
rear
cover
side
of

rotor
in
a

vise

with
soft

jaw
and

remove

pulley

nuts
Then
remove

pulley
and
fan

from
rotor
shaft

3

Remove

setscrews
from

bearing

retainer
and

separate
rotor
from
front

EE526

Fig
EE
32

Removing

Pulley
and
Fan

tr

s

0
27

Fig
EE
33
Removing
Rotor
Engine
Electrical

System

4
Pull

rear

bearfug
off
rotor

assem

bly
with
a

bearing
puller
or

press

EE037

Fig
EE
34

Pressing
Out

Rear

Bearing

I

EO

Fig
EE

35
Pulling
Out
Rear

Bearing

5

When

removing
IC

regulator

only

proceed
as
follows

I

Using

soldering
iron

disconnect

wire

connecting
diode

set

plate
to

brush
at
brush

terminal

2

Remove

bolt

securing
diode
set

plate
to
rear
cover
side
face

3

Remove
nut

securing
battery

terminal
bolt

4

To
facilitate
removal

s1ighly
lift

stator

coil

together
with
diode
set

plate
from

re
r
cover
Then
remove

screw

connecting
diode
set

plate
with

brush

5

Separate
stator
coil
and
diode

together
with

rear
cover
and

remove

brush
and

IC

regulator

6
Disconnect
stator

coil
lead
wires

from
diode
terminals
with

a

soldering

iron

Remove

screws

securing
brush
re

move
stator
from

rear
cover

EE648

Fig
EE
36

Removing
Stator

Coil

EE
14
7

Disconnect
wire
from
diode
tor

minal
at
brush
terminal
with

soldering

iron

Remove

brush

assembly
with
IC

regulator
by
loosening
screws

8
Remove
diode

holder

by
loosen

ing
screws

acefii
li

E
E649

Fig
EE

37

Removing
Diode
Holder

INSPECTION
AND

REPAIR

ROTOR
INSPECTION

I

Continuity
test
of
rotor
coil

Apply
tester
between

slip

rings
of

rotor
If

there
is

no

continuity
field

coil
is

open

Replace
rotor

assembly

Fig
EE

38

Continuity
Test

of

Rotor
Coil

2

Ground
test
of
rotor
coil

Check

continuity
between

slip
ring

and

rotor
core
If

continuity
exists

replace
rotor

assembly
because
rotor

coil

or

slip
ring
may
be

grounded

EE532

Fig
EE
39
Te

ting
Rotor
Coil

for
Ground