Alternator relay DATSUN 210 1979 Service Manual

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

CHOKEUNLOADER

I
Close
choke
valve

completely

2

Hold
choke

valve

by
stretching
a

rubber

band
between
choke
shaft
lever

and

stationary
part
of

carllUretor

3
Pull

throttle
lever
until
it

com

pletely
opens

4
Under
this
condition

adjust
clear

ance
e
See
illustration
between

choke
valve
and
carburetor

body
by

bending
unloader

tongue
See

Fig

EF
37

Clearance
C

All

modelS
ex

pt
F
U
model

2
36

mm
0
0929

in

FU
model

2
17

mm
0
0854
in

Note
Make

sure
that
throttle
valve

opensfuDy
when
carburetor
is

mounted

on
car

If
throttle
valve
fails
to

open
fully

unloader
becomes

inoperative
re

suiting
in

poor
acceleration
after

engine
is
started

AUTOMATIC

CHOKE

HEATE
IRCUIT

Checking
heater

circuit
with

function

connector

CAUTION

00

not
attach

test
leads
of
8
circuit

tester
to
those
other
than

designated

I

With

engine
not

running
check

for

continuity
between
A
and

B

If

continuity
exists
heater
is

fune

tioning
properly

If

continuity
does
not
exist

check

for
discon
nected

connector
or

open

P
T
C

heater
circuit

2

With

engine
running
at

idle
check

for

presence
of

voltage
across
A

and
B

If
voltmeter

reading
is
12
volts

heater
circuit
is

functioning
proper

ly

If
voltmeter

reading
is
zero

check

for
disconnected
connector

open

circuit
or

faulty
automatic

choke

relay

3

Replace
faulty

parts
Engine
Fuel

c

i

CD

1
Rubber
band

2
Unloa
er

tongue

3
Choke
vaJve

f
rC
EC150

Fig
EF

37

Adjusting
Choke
Unloader

SJ

v

1

Ignition
switch

2
Automatic
choke

relay

Engine
stop
ON

Engine
start
OFF
3
Automatic
choke
heater

4
Function
test
connector

5
L
terminal
of
alternator

EF

16
Fig
EF

38
EF433A

Checking
Automatic
Choke
Heater
Circuit

with
Function
Teat
Connector

FUSIBLE
LINK

FUSIBLE
LINK

f
BATTERY

@@

V

R

@@

G
G

FUSleLE

ImrnI
LI
NK

MTI

I
En

g
n
l
Electrical

Syst
lOl

IGNITION

SWITCH
FUSE

lOA

o
v

FUSE

lOA

C
V

L@@

BAT

f
L

S

BI

I

I

sl
fRO

L

I

I

F

I

EI

i
K
a

ALTERNATOR

lE
Ie

VOLTAGE

REGULATOR

I
I

L
WR

I
1

d

I

t
J

t
IGNITION

WR
SWITCH

BW

U
0

AUTO

CHOKE

RELAY
G
1

WR

J
I

00

00

gg
1

00

VR

1

E
lDID
I

@
O

BAT
mID

W

J
WR

W
FUSE

BLOCK

CHARGE

WARNING

LAMP

5J

BL

Note

@

V

@
California
models

Non
Qilifomo
18
models

FU
models

Fig
EE
29
Circuit
Dinrswr
EE742

mofCIuJ

Tg
ng
Sy
t
m

EE
12

DESCRIPTION

The

regulator
consists

essentially
of

in

egrated
circuits

incorporating
tran

sistors

These
transistors
int

errupt
and

admit

current
flow

to
the
alternator

rotor

coil
thus

maintaining
its

output

voltage
at
a
constant
value
Unlike
in
a

mechanical

type
regulator
an
electron

ic

relay
employing
transistors
is
uti

lized
These
transistors

are
enclosed
in

a

very
compact
sealed

case
The

electronic

relay
is

soldered
to
the

Brush

Ie

regulator

R

J

DIO

F

i
ZD

Tn
Engipe
Electrjcal
Syst
em

REGULATOR

brush

assembly
inside
the

alternator

Should

any

problem
with
the

relay

arise
it

should
be

replaced
together

with
the

brush

assembly
In
the

charge

warning
lamp
circuit
a
diode
is
at

tached
to
the
stator
coil
to

monitor

generating
voltage
at
the
stator

so
that

when
the

monitored

voltage
and

charging
voltage
are

equal
during
re

charging
the

charge

warning
lamp
is

turned
off

Accordingly
a

charge

warning
relay
is

not

employed
in

this

circuit

s

r
t

E

F
L
S
B

EE629

Fig
EE
51
lC

Voltage
RegultJtor

I

B

S

L

I

R

R

E
B
S
L

E
F
Terminal

R
Resistor

Rh
Thermistor

Tr
Transistor

ZD
Zener
diode

EE766

Fig
EE
52

Circuit
of
RegultJtor

EE
18
INSPECTION

To

check
the

IC

regulator
proceed

as
follows

Remove
IC

regulator
and

brushes
as

an

assembly
as
outlined
in

Disas

sembly
and

Assembly
section
under

the

heading
Alternator

CAUTION

When

performing
test

continuously

resistor

may
generate
heat
If

it
be

comes

high
temperature
stop
testing

for
a

while
to
avoid

burning

The

following
test

equipment
and

accessories
are

required

I
Resistor
R
10

ohms
20

watts
x
I

2

Variable
resistor

Rv
0
to
300

ohms
20
watts
x
I

3

Batteries
I

and
2
12

volts

x2

4
DC

voltmeter
0
to
30
volts

x
I

2
Connect

wiring
as
shown
in

Fig

EE
S3
and

perform
tests
as
follows

I

Measure

voltage

VI
at

battery
If

it
is

not
within

10
to
13

volts
re

charge
or

replace
battery
as

necessary

2
Disconnect
lead
wire

at
terminal

s

measure

voltage
V

2
between

terminals
F

and
E
If
it
is

below

2
0
volts

regulator
is

functioning

properly
Connect

lead
wire

to
termi

nalS

3

Measure

voltage
V

3
total
volt

age
of

batteries
I

and
2

If
it

is
not

within

20
to
26
volts
re

charge
or

replace
either
or

both
batteries

4

Gradually
decrease
resistance
of

variable
resistor

Rv
from
300
ohms

and
measure

voltage
V

2
between

terminals
En
and
F
As
resistance

m
c
n
to
l
l

I
g
iF
0
1
To
side
marker
lamp
L
H

2
To
headlamp
L
H

3
To
horn
L
H

4
To
front
combination
lamp
L
H

5
To
cooler
co
pressor
Air
Con
models

6
To
oil
pressure
switch

7
To
condenser

8
To
horn
R
H

9
To
front
combination
la
t11p
R
H

10
To
side
marker
lamp
R
H

11
To
headlamp
R
H

12
To
body
earth

13
To
fusible
link

14
To
inhibitor
relay
AfT
model

15
To
aut6
choke
relay

16
To
ignition
coil

17
To
condenser

18
To
washer
motor

19
To
engine
harness
No
2
@

20
To
alternator

21
To
starting
motor

22
To
throttle
opener
solenoid
Except
FU
models

23
To
fuel
cut
solenoid
Except
FU
models

24
To
throttle
switch
FU
models

25
To
fuel
cut
solenoid
FU
models

26
To
auto
choke

27
To
VC
cut
solenoid
M
T
and
Calif
AfT
models

28
To
distributor

29
To
thermal
transmitter

30
To
body
harness

31
To
low
pressure
switcn
Air
Con
models

32
To
rear
window
washer
motor

33
To
FICO
solenoid
Air
Con
models

34
To
room
lamp
harness

35
To
cooling
unit
Air
C
on
models

36
To
heater
motor
37
To
engine
revolution
switch
FU
models

38
To
rear
wiper
switch

39
To
wiper
motor

40
To
brake
level
switch

41
To
belt
timer

42
To
horn
relay

43
To
stop
lamp
switch

44
To
kickdown
switch
AfT
model

45
To
hazard
flasher
unit

46
To
turn
signal
flasher
unit

47
To
ignition
switch

48
To
steering
lock

49
To
wiper
switch

50
To
turn
signal
and
hC
rn
switch

51
To
lighting
switch

5i
To
hazard
switch

53
To
belt
switch

54
To
door
switch
L
H

55
To
hand
brake
switch

56
To
automatic
transmission
control
indicator

AfT
models

57
To
instrument
harness

58
To
check
connector
I
0
i
a

z
Z
G
z

tIl
tIl
a
Z
Il
I
to

o
Co
m
16

n
n
OJ
1
3

m
ii
I
ll
i
f
r
3
0
tl
i

a
iO

3
o
J
r
L

8
ffi

12V

BATTERY
I
STARTING
MOTOR
I

I

G

0
0
9

@@
@@
L
J
W
MAIN
RELAY

AIR
CONDITIONER

w
ALTERNATOR

SAND
B
TERMINALS

HEADLAMP

FUSE
BLOCK
I

WR
1
IGNITION
SWITCH

R
1

Note
@
i
W
Californta
models

Non
alifornt8
models
for
U
S
A

Non
CaliforOlB
FU
model

Canada
models
II
II
n
I
a
n
e
xI

ltZ
O
C

It
10
II
I
l

C
m
xl

0
l
OJ

3
0

n
CJ

II
m

al
CD

Z
0
2

a
t
CIl

xI

I
0
c
l

OJ
3

m

2
l
C
Z

o
CJ
m

CJ

cIo

CD
m
t
tl
3

Cl
4
Ii
ii
C
l
I
i

I
ll
g
toom
a

ll
CALIFORNIA
ANO

BATTERY
FU
MOOELS

R
G
ff
w

G
M
wr

N
Q
WR

ALTERNATOR
ANO
IC
NON
cALIFOR
IA

VOLTAGE
REGULATOR
ANO
CANAOA
MO
S
I

fh
WR

B
i
W

i
C
@
J
W

l
9
i
j
@
Q
B

LB
OIL
PRESSURE

SWITCH

0
I
I
l
lOCI
OfflACC
OH
SI
Ys
j

D
01
mQ
IS
i

I
l

I
s
II

10
J
J

SWITCH

IGNITION
iji
BY

wr

1
I
1

IW

BRAKE
FLUIO
LEVEL
SWITCH
Ot
o
BJ

JO
0
Y
l

I
AUTO
cHOKE
RELAY

V
I

r
I

MAIN
HARNESS

FUSE
BLOCK

0
0
lOA

cr
L

lOA

cr
G

1
r
L
BL
HANO
BRAKE

SWITCH

G
J
i

INSTRUMENT
HARN
ESS

fG
YG

10
OMB
N
AT
qN
ETER

o
BRAKE

0
WARNING
LAMP

100
G
O

00
3

YB
f

G

WR
J
I
0

1
Fo
o

e
i

1
z

YB
OIL
PRESSURE

WARNING
LAMP
J

lI
a

Ill
z

11
1
III
Z
G

Ill
11
1
Ut
0

iUt
Ill
alii
11
1
I

a
i
l
i
Ill
Z
i
a
X
OJ

o
Cl
m
CD
o
CIl
l
3

Body
Electrical

Sy
tem

Oil

pr
re
charg
and
brake

warillng

Condition

Lamp
does
not

glow

when

ignition
switch

is

turned
ON
with

out

running
engine

Door
and

charge

warning
lamps
do
not

go
out
when

engine
is

started

Charge
waming
amp

Lamp
does
not

go
out

when

engine
is
started

Oil

pressure
warning

lamp

Lamp
does
not

light

when

ignition
switch

is

set
to

ON

Lamp
does
not

go
out

while

engine
is

being

operated

Brake

warning
lamp

Lamp
does
not

go
out

Door

warning
lamp

Lamp
does
not

glow

with
door

opened
and

engine
running
Probable
cause

Burnt
bulb
or

loo
ebulb

Loose
or

poor
connection

Faully
bulb
check

relay
or
alternator

Faully
charging
system

Faully
oil

pressure
switch

or
loose

switch

terminal
connection

When
lead
wire
connected
to

switch
is

grounded
warning
lamp
lights

Lack
of

engine
oil

Oil

pressure
too
low

Faully
oil

pressure
switch

Faulty
hand
brake

switch

When
hand
brake

lever
is

released

Faully
brake

fluid
level
switch

When
brake

fluid
level
is
normal

Faully
door

switch

BE
46
Corrective
action

Replace
bulb
or
correct

Correct

connector
terminal

contacts

Correct

adjust
or

replace

Inspect
charging
system

Replace
or

correct
connection

Check
oil
level
and
add
oil

as

required

Inspect
engine
oil

pressure
system

Replace

Replace

Replace

Replace

Horn

Condition

Neither

high
nor
low

horn

operates

High
Low

horn

does
not

operate

Horn
does
not

stop

to
sound

Reduced
volume
and

or

tone

quality
Body
Electrical

System

Probable

cause

Burnt

fuse

Faulty
horn

button
contact

Horn
sounds
when

@
terminal
of

inst

harness
connector
to

combination
switch
is

grounded

Faulty
horn

relay

Horn

sounds
when

CD
and

ID
terminals

of

engine
harness
to
horn

relay
are
connected

with
a

test
lead

including
15A

fuse

Lo
se

conn
ection

or

open
circuit

Faulty
horn
or
loose
horn

terminal
connee

tion

Break
in
wire

to
horn

Short
circuited
horn
button
and

or
horn

button
lead
wire

When
inst

harness
is

disconnected
from

combination
switch
horn

stops
sounding

Faulty
horn

relay

Loose

or

poor
connector
contact

Fuse

relay
horn
and
or

horn
button

Faulty
horn
Corrective
action

Correct
cause
and

repbce
fuse

Repair
horn

button

Replace

Check

wiring
and

or

repair
connection

Correct
horn
terminal
connection
or

replace

horn

Repair

Repair
horn
button
or
its

wiring

Replace

Repair

Replace

Radio

Noise

prevention
chart

Position
car
in
an

open
area

away
from

steel

buildings
run

engine
extend
antenna

to
its

maximum

length
set
volume

control
to
maximum
and
set

dial
at
a

median

point
where
no

broadcasting
wave
is

received

Condition

Probable

cause

Ignition
system

Noise
o
curs
when

engine
is

operated
High
tension

cable

Ignition
coil

Charging
system

Sound
of

alterilating
current

present
Alternator

When
accelerator

pedal
is

depressed
or

released

noise
occurs
Voltage
regulator

BE

54
Corrective
action

Install
new

high
tension

cable

Replace
O

5
lF
capacitor
installed
to

primary
side

terminal
of

ignition
coil
with

ne
ones

Note
Be
careful

not
to
install

capacitor
to
see

ondary
or

primary
breaker
side
This
will

result

in

improper
engine
operation

Replace
O
5

lF
capacitor
installed
to

charging
ter

minalA

Note
Do

not
use
a

larger
capacitor

Install
a
O
5

lF

capacitor
to

IGN
terminal

of

voltage
regulator

WIRING
DIAGRAM

CIRCUIT
DIAGRAM

Air

conditioner
system

G
DD

w

FUSIBLE

LINK

I
BATTERY

LG
Lr

LG
c
J

LW
J

I
THERMOSTAT

W

W

r
B

B
8

ALTERNATOR

IGNITION

SWITCH

il

W

LB

LLG

J

LOW
PRESSURE

SWITCH

L
c
J

L
c
J

l

J
MAGNET

VALVE

L

c
J
CJ
C

COMPRE
SOR

CLUTCH

LIT

IACC

15A

L1

3
E
FUSE
BLOCK
Air

Conditioning

W

1
8
t
FUSE

20A

MAIN

RELAY

J
rn

W
I

fJ
RESISTOR

Dt
J

M
BLOWER

MOTOR

W

c
J
c
J
C

r

BvM

LW

LY
I

MICRO

SWITCH

B

AC404A

Fig
AC
39
Circuit

Diagram

of
Air
Conditioner

I

AC

25