engine DATSUN PICK-UP 1977 Service Manual

I
Emission

Control

System

Ignition
switch

Ignition

key
Off

T

I

I

I

Battery

I

J

77

77
Relay

J

Floor

temperature

sensing
swi

tch
Floor

temperature

warning

lamp

77
77

EC332

Fig
EC

70
Win

ng
diagram
of
floor
temperature
warning
system

r
l

J
@

1

Floor

temperature

Ij

cr

EC556

Fig
EC
71
Location

of
iJoor

temperature
sensing
switch

OPERATION

Floor

temperature
will
exceed

nor

mal
level

when

temperature
rise
in

the

exhaust

system
succeeding
the
cata

lytic
converter
is
caused

byeilher
an

engine
malfunction

or
severe

driving

conditions

Under
this
condition
the

floor

temperature
sensing
switch
turns

off

causing
the

starting
switch
line
of

the
floor

temperature
relay
to
turn
off
and
the

ignition
switch
line
to
turn
on

as
a
result
the
floor

temperature

warning

lamp
comes
on

When
the
floor

temperature
is

lower
t

an
the

specific

temperature

the

floor

temperature
sensing
switch

turns

on
The

ignition
line

of
the
floor

temperature
relay
turns
off
while
the

starting
switch
side
is
in

on
The
floor

temperature
warning

lamp
goes
out

EC
2B
The

lamp
is

functioning
sa
tis

factorily
if

it
is
remains
on

while
the

starting
motor
is
in

operation
The

lamp
goes
out
when

the

ignition

switch
is
in

IG

position

The

foUowing
chart

furnishes
the

information
on

the

relationship
be

tween

floor

temperatures

warning

lamp
and

sensing
switch

L

Contact
close

ECJ40

I

Contaclopen

ECJ41

Fig
EC
72

Operation

of
floor

t

mperature
sen6ing

6witch

REMOVAL

Floor

temperature

sensing

switch

1
Remove
seat

Seat
section
of

service
manual

2
Remove

sensing
sWitch
as
outlined
in

the

Body
and
Frame

floor

temperature

Floor

temperature
relay

From
under

relay
cover
remove

this

part
Refer
to

Figure
EC
73

Floortemperature

EC783

Fig
EC
73
Location

of
floor

ttmperature
relay

3

Check

ignition
system
with

regard

to

the

following
items

Refer
to

Inspection
of

Ignition
System

1

Ignition
AMP

2
Distributor
Emission
Control

System

3

Ignition
coil

4

High
tension
code

5

Spark

plug

4

Check
idle

CO

adjustment
Refer

to

Inspection
of
Idle

CO

Adjustment
Note
Even
if
there
is

nothing

wrong

with

engine
the

warning
lamp
may

come
on
if
vebicle
is

being
driven

on
a

steep
slope

continuously
in

lower

gears
at

high
engine
speeds

EVAPORATIVE

EMISSION

CONTROL
SYSTEM

CONTENTS

DESCRIPTION

OPERATION

INSPECTION

FUEL
TANK

VAPOR
LIQUID

SEPARATOR

AND

VAPOR
VENT
LINE

DESCRIPTION

The

evaporative
emission
control

system
is

used
to

reduce

hydrocarbons

emitted
to
the

atmosphere
from
the

fuel

system
This

reduction
of

hydro
EC
30

EC

30

EC

31
CARBON

CANISTER
PURGE
CONTROL

VALVE

CARBON
CANISTER

FILTER

FUEL

TANK

VACUUM
RELIEF
VALVE
IEC
32

IEC
32

EC

32

EC
31

carbons
is

accomplished
by
activated

charcoals
in
the
carbon
canister

This

system
is
made

up
to

the

following

I

Fuel
tank
with

positive

sealing
filler

cap

@
2

Vapor
liquid
separator

3

Vapor
vent

line

4
Carbon

canister

5
Vacuum

signal
line

6
Canister

purge
line

5

OPERATION

Fuel

vapors
from

the
sealed
fuel

tank
are
led

into
the
carbon
canister
1
Fuel
tank

2
Fuel
nIler

cap
with
vacuum

relief

valve

3

liquid

vapor
separator
4

Vapor
vent
line

5

Canister

purge
line

6
Vacuum

signal
line

7
Carbon

canister

EF274

Fig
EC
76

Schematic

drawing
of
l
Iaporotive

emiaion

control6ydem

The

canister
is
fined
with
activated

charcoals

to
absorb

the
fuel

vapors

EC
30
when
the

engirie
is

at
rest
or
at

idlin
ll

See

Figure
EC

77

J

1
Fuel
tank

2

Fuel
f1l1er

cap
with

vacuum

relief
valve

3

Liquid
vapor

separator

4

Vapor
vent
line

5
Vacuum

signalUne

As
the
throttle
valve

opens
and

vehicle

speed
increases

vacuum

pres

sure
in

the
vacuum

signal
line
forces

rHL
JL

I

EC785

INSPECTION

FUEL
TANK

VAPOR

LIQUID
SEPARATOR

AND

VAPOR
VENT
LINE

I

Check
all
hoses
and
fuel

tank

mler

cap

2
Disconnect
the

vapor
vent

line

connecting
carbon
canister
to

vapor

liquid
separator

3
Connect
a
3

way
connector

a
Emission

Control

System

Close
at

idling

Open
at
rest

i

J

17
f

Fuel

vapor

6
Canister
purge
line

7
Throttle
valv

8

Engine

9
Carbon
canister

10
Activated
carbon

11

Screen
12
Filter

13

Purge
control
valve

14

Spring

15

Diaphragm

16
Fixed

orifice
i

j

EC784

Fig
EC
77

Evaporative
emu
ion
control

sy
tem

Fuel

vapor
flow
when

engine
i6

at
red
or

idling

the

purge
control
valve
to

open
and

admits
an

orifice
to
intake
manifold

and
fuel

vapor
is

then
drawn
into
the

I

J

o
I

Fuel

vapor

Fresh
air
intake

manifold

through
the
canister

purge
line
See

Figure
EC
7B

Fig
EC
78

Evaporative
emiuion
control

system

Fuel

vapor
flow
when

engine
i

running

manometer
and
a
cock
or
an

equiva

lent
3

way

charge
cock
to

the
end
of

the

vent
line

4

Supply
fresh
air
into

the

vapor

vent
line

through
the
cock
little

by

little
until

pressure
becomes
368

mrnH20

14
5
inH20

5
Shut
the
cock

completely
and

leave
it

unattended

6
After
2
5
minutes

measure
the

height
of
the

liquid
in
the

manometer

7

Variation
of

height
should
remain

EC
31
with
25
mmH20
0
98
inH20

8
When
filler

cap
does
not
close

completely
the

height
should

drop
to

zero
in

a
short
time

9
I
f

the

height
does
not

drop
to

zero
in

a
short
time
when
filler

cap
is

removed
it
is

the
cause
of
a

stuffy

hose

Note
In

case
the

vent
line
is

stuffy

the

breathing
in
fuel
tank
is
not

thoroughly
made
thus

causing
in

sufficient

delivery
of
fuel
to

engine

or

vapor
lock
It
must
therefore
be

1

3
connectur

COCk

Air
Manometer
Emission
Control

System

repaired
or

replaced

368
mmH20

14
5
inH20

LL

IPO
liqUid
epo
o

36

r
@

Carbon
canister

EC786

Fig
EC
79

Checking

evaporative
emmion

control

syatem

CARBON

CANISTER
PURGE

CONTROL
VALVE

Check
for
fuel

vapor
leakage
in

the

distributor
vacuum
line
at

diaphragm

of

carbon

canister

purge
control
valve

To

check
for

leakage
proceed
as

follows

I

Disconnect
rubber
hose
in

the

line

between
T
connector

and
carbon

canister
at
T

connector

2

Inhale
air
into
the

opening
of

rubber
hose

running
to

vacuum
hole
in

carbon

canister
and

ensure
that
there

is
no

leak

ET349

Fig
EC
so

Checking
carbon
canuter

purge
control
valve
3
If
there
is

a
leak

remove

top

cover
from

purge
control
valve

and

check
for
dislocated

or
cracked
dia

phragm
If

necessary

replace
dia

phragm
kit

which
is
made

up
of
a

retainer
a

diaphragm
and
a

spring

@

@

1
Cover

2

Diaphragm

3
Retainer

4

Spring

ET350

Fig
EC
81
Carbon

catU
ter

purge

control
valve

CARBON

CANISTER
FILTER

Check
for
a
contaminated

element

Element

can
be
removed

at
the

bottom
of

canister

installed
on
vehicle

body

EC
32
ET37Q

Fig
EC
s2

Replacing
carbon

canuter

filter

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
clicks

3
If

valve
is

clogged
or
if

no
resist

ance
is

felt

replace
cap
as
an
assem

bled

uni
t

l

u

ET369

Fig
EC

83
Fuel

filler
cap

DATSUN
PICK

UP

MODEL
620

SERIES

I
NISSAN

I

NISSAN
MOTOR

CO
LTD

TOKYO
JAPAN
SECTION

EE

ENGINE

ELECTRICAL

SYSTEM

BATTERY

EE
2

STARTING

MOTOR
EE

4

CHARGING

CIRCUIT
EE

12

ALTERNATOR
EE
15

REGULATOR

EE
20

IGNITION

CIRCUIT
EE

26

DISTRIBUTOR

EE

30

Non

California

models

DISTRIBUTOR
California
models
EE

33

TRANSISTOR
IGNITION
UNIT

California
models

IGNITION
COIL

SPARK
PLUG
EE
36

EE

46

EE
47

REMOVAL

CHECKING
ELECTROLYTE
LEVEL

CHECKING
SPECIFIC
GRAVITY

REMOVAL

I
Disconnect

negative
and

positive

cables

2
Remove

nuts
from

battery

clamps
take
off

clamps

3
Remove

battery

CHECKING

ELECTROLYTE
LEVEL

Remove
six

vent

plugs
and
check

for

electrolyte
level
in
each
cell

If

nccessaJ

pour
distilled
water

CHECKING

SPECIFIC

GRAVITY

Specific
gravity
of

battery
electro

lyte
is
tested

by
a

hydrometer
If
the

srate

of

charge
of

battery
is

60
or

specific
gravity

reading
is
below
1
20

as
corrected
at
200e
680F
bat

tery
must
be

recharged
or

battery

electrolyte
concentration

adjusted

Add
or
subtract

gravity
points

according
to
whether
the

electrolyte

temperature
is
above

or
below
200e

680F

standard

The

gravity
of

electrolyte
chlll

ges

0

0007
for

every
Ioe
1
80F
tem

petature
A
correction

can
then
be

made

by
using
the

following
formula
Engine
Electrical

System

BATTERY

CONTENTS

EE
2

EE
2

EE
2
BATTERY
FREEZING

CHARGING

INST
ALLA
TION

S

20
St
0

0007
t
20

Where

St

Specific
gravity
of

electrolyte

at
tOe

520

Specific
gravity
of

electrolyte

corrected
at
200e
680F

t

Electrolyte

temperature

For

example
A

hydrometer

reading
of

1
260
at
300e

860F

would

be
1
267
corrected

to
200e

6goF

indicating
fully
charged

battery
On
the
other
hand
a

hydro

meter

reading
of
1
220
at
lOoe

140
F
would
be
1
199
corrected
to

200e
680F

indicating
a

partially

charged
battery

The
state
of

charge
of

battery
can

be
determined

by
the

following
table

if

the

specific
gravity
of

electrolyte
is

known
BefOIe

checking
be
sure
that

cells
are
filled
to
correct
level

G
U

o

N

b
t

E

u

ol

1
lilt

I
i
I

m
J

I
I

I
I

J
1
I

J
Sf
to
7
1
II

It
100

0wJIztI
COJJditioD

EE002

Fig
EE
2

ChaJ
ffing
condition

EE
2
1
28

@

126

S

Sow

E

l

l

u

o

o

l

e

u

0

U21

1

101
EE

3

EE

3

EE
3

Read

top
level

with
scale

1
Thermal

gauge

2

Hydrometer
feOOl

Fig
EE

l

Checking
pccme
gravity

Converted

specific
gavity

20

1
Je

I

dOldlOiJ
OSQ

Electrolyte
temperature
oC

EEOO3

Fig
EE
3

Specific
lNWity
at

eiectroly
te
temperature

BATTERY
FREEZING

Battery
electrolyte
freezing
point

varies
with
acid
concentration
or
its

specific
gravity
A

battery
with
an

insufficient

charge
will
freeze
at
lower

temperatures
If

specific
gravity
of
a

battery
falls
below
1
1
this
is

an

0

10

20

30

g

40
I
u

il

SO
I
0

e

60
0

E

70
Engine
Electrical

System

indication
that

battery
is

completely

discharged
and
will

freeze

readily

when

temperatures
fall
below

freezing

Note
Use
extreme
caution
to
avoid

freezing
battery
since

freezing
will

generally
ruin
the

battery

1

80

1
00
1
04
1
08
t
l2
1
16
t
20
1
24
1
28

Specific
gravity
of

electrolyte

CHARGING

I

f
electrolyte
level
is

satisfactory

battery
must
be

charged
when
electro

lyte
gravity
reading
falls
below
1
20
If

battery
on

car
is

quick
charged
to
1
32

EEOQ4

Fig
EE

4
Froezing
point
of
electrolyte

bring
it

up
to
full

charge
the

opera

tion
should
be
carried
out

with
nega

tive
cable
removed

Prior

to
charging
corroded
termi

EE
3
nals
should
be

cleaned
with
a

brush

and
common

baking
soda
solution
In

addition
the

following
items

should

be
observed
while

battery
is

being

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
450C
I130F

4

After

charging
check
to
be
cer

tain
that

specific
gravity
does
not

exceed
1
260
at
200C
680P
Cor

rection
can
be
made

by
adding
dis

tilled
water
into

cells
as

necessary

5

Keep
battery
away
from

open

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
Install
and

tighten
clamps
secure

Iy

2
After

clamps
have
been

tightened

clean

battery
cable
terminals
and

apply
grease
to
retard
formation
of

corrosion

DESCRIPTION

OPERATION

CONSTR
UCTI

ON

REMOVAL

DISASSEMBL
Y

CLEANING
AND
INSPECTION

TERMINAL

FIELD

COIL

BRUSHES
AND
BRUSH
LEAD
WIRE

BRUSH
SPRING
TENSION

ARMATURE
ASSEMBLY

DESCRIPTION

The
function
of
the

starting
system

which
consists
of
the

battery
ignition

switch

starting
motor
and
solenoid
is

to
crank
the

engine
The
electrical

energy
is

supplied
from
the

battery

the
solenoid

completes
the

circuit
to

operate
the

starling
motor
and
then

the
motor
carries
out
the
actual
crank

ing
of
the

engine
Engine
Electrical

System

STARTING
MOTOR

CONTENTS

EE
4

EE

6

EE

7

EE
7

EE

7

EE

8

EE

8

EE
B

EE

B

EE

B

EE

B
OVERRUNNING
CLUTCH
ASSEMBLY

BRUSH
HOLDER
TEST
FOR

GROUND

BEARING
METAL

MAGNETIC
SWITCH
ASSEMBLY

ASSEMBLY

TEST

PERFORMANCE
TEST

MAGNETIC

SWITCH
ASSEMBLY
TEST

SERVICE
DATA

AND
SPECIFICATIONS

TROUBLE
DIAGNOSES
AND

CORRECTIONS

5

@
EE
9

EE
9

EE
9

EE
9

EE
9

EE
9

EE
9

EE
O

EE

EE
11

I
Brush

2
Field
coil

3

Magnetic
switch

4

Pludgcr

5
Torsion

spring

6
Shifll
r

7

Overrunning
clutch

8
Pinion

9
Armature

9

EE315

Fig
EE
5
Sectioool
view

of

slarting
motor
Sl14
180B

EE
4

fB
WBBYBY
B

@@@@

I
I

FUSIBLE
lIN

r
T

H

BATTERY
rJ

BATTERY

f

EARTH
POINT

f

I
I
I

@@@

Y

BY

BWWB

@@@

I

I
I

AfT
E

quipped
with

cooler

COLOR
CODE

B
Black

OW
Black
with

white

stripe

BY
Black
with

yellow

stripe

W
White

WB
White

with
black

stripe
Engine
Electrical

System

FUSIBLE
LINK

1Y
O
b
INHIBITOR
RELAY

INHIBITOR
SWITCH

A

I
J
Y

@

I

A

l

rBW

j

CJ

B
W
BWI
000

000

ggg
For

California

I

Bd

f
00

00

00

00

Q

BW

B

Y

BY
WB

BY

@
@
@

BW

@

I
M
T

Equipped
with
cooler
@
I

@

BY

BY

@

I
STARTING

MOTOR

l
BY

BW

9

IGNITION
SWITCH

L

INHIBITOR
SWITCH
STARTER

MOTOR
Notes

a

@
M
T
only

@
A
T

only

b
Inhibitor
switch
is

on

in
neutral

EE
5
Fig
EE
6
Circuit

diagram
0

starting
systom
eE491

OPERATION

When
the

ignition
switch
turned

fully
clockwise
to
the
START

posi

tion

battery
current
flows

through

series

and
shunt

coils
of
the

solenoid

magnetizing
the

solenoid

The

plunger
is

pulled
into
the
solenoid

so
that

it

operates
the
shift
lever

to

move
the

drive

pinion
into

the

flywheel
ring
gear
Then
the

solenoid

switch

contacts
close
after
the

drive

pinion
is

partially
engaged
with
the

ring
gear

Closing
of
the

solenoid
switch

contacts
c
uses
the

motor
to
crank
the

engine
and
also
cut
out
the
series

coil
of

the
solenoid
the

magnetic

pull

of
the
shunt

coil

being
sufficient

to

hold
the

pinion
in

mesh
after
the

shifting
has
been

performed

After
the

engine
starts

running
the

driver

releases
the

ignition
key
and
it

automatically
returns
to
the

ON

posi

tion

The
torsion

spring
then

actuates
the

shift
lever

to

pull
the

pinion
which

allows
the

solenoid
swi

tch
contacts
to

open

Consequently
the

starting
mo

tor

stops
Engine
Electrical

System

I

I

Ring
gear

2

Shift
lever

guide

3
Armature

4

Battery

5
Field
coil

6

Stationary
contact

7
Monble

contactor

More

positive

meshing
and

demeshing
of

the

pinion
and
the

ring

gear
teeth
are

secured

by
means

of
the

overrunning
clutch
The

overruIUling

clutch

employs
a
shift

lever
to
slide

the

pinion

along
the

armature
shaft

EE
6
F

l
cp

o

r

1

I
I

W

m

EE274

8
Shunt
coil

9

Plunger

10

Ignition
switch

11

Series
coil

12
Torsion

spring

13

Shift
lever

14

Pinion

Fig
EE

7
Starting
motor
circuit

into
or

out
of

mesh
with
the

ring

gear

teeth
The

overrunning
clutch
is

de

signed
to
transmit

driving

torque
from

the
motor
armature

to
the

ring
gear

but

prevent
the

armature
from
over

running
after
the

engine
has
started