brake DATSUN PICK-UP 1977 Service Manual

Fig
GI
9
Manual
trammiuion
number

location

Automatic

transmission

number

The
transmission

serial
number
is

attached
to
the

right
hand
side
of

transmission

case

Numbering
system

X
XXXXX

I

Serial
number

monthly

Month
of

manufacture

I
2

9
X
Y
Z

last

figure
of

year
of

manufacture

AT344

Fig
01
10
Automatic
trammi

sion

number
location

LIFTING
POINTS

AND
TOWING

LIFTING

POINTS

Screw

jack

Before

using
the

jack
proceed
a

follows
Generallnforml
ition

Apply

parking
brake

firmly
and

block
rear
wheels
if
the
front

of
the

vehicle
is
to

be
raised

Notes

a
Never

get
under
the
vehicle

while
it

is

supported
only
by
the

jack

Always
use

safety
stands
to

support

frame

or
rear
axle

case
when

you

have

to

get
beneath
the
vehicle

b
In
no
event
should
the

jack
be

applied
to

any
points

except
the

following
specified
portions

When

jacking
up
the
front
side

place
a
screw

jack
under
side
frame

about
520
nun

20
5
in
at
rear

of

front
axle
center

WT012

Fig
GI
ll
Front

lifting
point

When

jacking
up
the

rear
side

place

a
screw

jack
under
rear
axle
case
close

to
the
side

of
rear

spring

WH077

Fig
GI
12
Reor

lifting

point

Notes

a
When

the

yellow
mark

appean
on

the
screw

jack
it
indicates
the

maximum

permissible
height
Do

not

jack
up
further

b

When
the

jack
is
at
lower
llinit
do

not

add

large
force
downward

GI
6
YeDow
mark

WHOSO

Fig
GI

13

Warning

ogai
t

over
stroke

Garage

Jack

Note
When

carrying
out

operntions

with
a

garage

jack
be
sure
to

support
the
vehicle
withstands
in

a
safe
manner

When

jacking
up
the
front
end

apply
garage
jack
to
front
cross

member
or
center

portion
of
sus

pension
member

When

jacking
up
the
rear
end

apply
the

jack
to
rear
axle
case

r
J

uc

I

GI075
n9

Fig
GI

14
Front

lifting
point

GI076

Fig
GI
15
Rear

lifting

point

SUPPORTABLE
POINTS

The
front

supportable
points
are

under
frame

side
member

The
rear

supportable
points
are

under
rear

axle
case

Fig
GI

16
Front

supportable
points

v

GI078

Fig
GI
17
Rear

supportable
points

TOWING

When
the
vehicle
is
to
be

towed

forward
connect

a

rope
securely
to

the
hook
under
the
1st

CrosSIn
ember

Before

towing
make
sure
the

parking

brake
is

released
General
Information

To
tow
another
car
connect
t1ie

rope
to
rear
leaf

spring
shackle

Notes

a
A

towing
rope
should
not
be
con

nected
to

any
position
other
than

as
described
above

b
Avoid

applying
load

suddenly
to
a

towing
rope
as
it

may
cause
dam

age

WH131

Fig
Gl
18

Fronttowing
point

Fig
01
19
Rear
towing
point

GI
7
Manual
transmission

Before

towing
make
sure

the
trans

mission
is
in
neutral

gear

If
the
rear
axle
or
transmission
is

inoperative
the
vehicle
should
be

towed
with
its

rear
wheels
off
the

ground
or
the

propeller
shaft
must
be

re
l1oved

Automatic
transmission

When
the
vehicle
is
towed
on
its

rear
wheels
make
sure
the
trans

mission
is
in
N

Neutral
position

Don
t
exceed
30
km
h
20

MPH
and
a

distance
of
Hi
kin

6
miles
If
the
rear

axle
or
transmission
is

inoperative
or

if
the

speed
exceed
the
above
condi

tions

the
vehicle
must
be
towed
with

its

rear
wheels
off
the

ground
or
the

propeller
shaft
must
be
removed

Note
When
the
vehicle
is
towed
with

its
front
wheels
on
the

ground
the

steering
wheel
shouId
be
secured

to

maintain
a

straight
ahead

position

TIE
DOWN

The
front
two
tie

down
hooks

are

located
under

the
1st
crosSInember

The
hook
is

available
as
a

towing

hook
For
rear
tie
down
the
rear
leaf

spring
shackle
be
used
lIDs

point
is

also
used
as
a

towing
point

General
Information

LUBRICANT
SPECIFICATIONS

Item

Specifications
Remarks

SAE
Classification
Furthermore
refer
to

Gasoline

engine
oil

SD

or
SE
SAE
recommended

viscosity

table
See

Poge
GI
B

Transmission

and
API
GL
4

0

steering

Differential
API
GL
S

Automatic

TIM
fluid

Type
DEXRON

Multipurpose

grea
NLGI2
lithium

soap
base

Brake
and
clutch
fluid
DOT

3

Permanent
anti

freeze

Antifreeze

Ethylene
glycol
ba
e

GI
9

EE322

Fig
ET
15
Checking
diltribu
tor

point

gap

AIR
GAP

California
models

For

inspection
procedures
and

reference
data
refer

to
the

topic
Air

Gap
in

Section
EE

page
EE
29

DISTRIBUTOR

Check

centrifugal
advance
unit
for

loose
connection
or

improper
opera

tion
If
it
is
not

operating
properly

the

problem
may
be

due
to
a

sticky

spring
or
excessively
worn

parts
This

operation
needs
a
distributor
tester

For

inspection
procedures
and

ref

erence
data
refer
to

relative

topic

under
Distributor
in

Section
EE

If
vacuum
advance
mechanism
does

not

properly
operate
check
for
the

following
items
and

correct
the

prob

lem

as

required

1
Check
vacuum
inlet
for

signs
of

leakage
at
connection
If

necessary

retighten
or

replace

2

Check
vacuum
diaphragm
for
air

leak

If

necessary
replace
diaphragm

3

Inspect
breaker

plate
for
smooth

movement

If

plate
does
not
move
smoothly

this
condition
could
be
due

to

sticky

steel
balls
If

necessary
replace
break

er
plate
assembly

IGNITION
WIRING

Use

an
ohmmeter
to
check
resist

ance
of

secondary
cables
Disconnect

cables
from

spark

plugs
and
install
a

proper
adapter
between
cable
and

spark
plug
Remove

distributor
cap

and
secondary
cables
as
an

assembly

Do
not
remove
cables
from

cap

Check
resistance
of
one
cable
at
a

time

Connect
ohmmeter
between

spark

plug
adapter
and

corresponding
elec

trade
inside
cap
If
resistance
is
more

than
30
000
ohms
remove
cable
from
Engine
Tune

up

cap
and
check
cable
resistance

only
If

resistance
is
still
more
than

30
000

ohms

replace
cable

assembly

EF125

Checking
high
tension

cable

CHECKING

DISTRIBUTOR
CAP

ROTOR
AND

CONDENSER

Note
This

operation
is

to
be

per

formed
while

checking
distributor

points
Inspect
distributor

cap
for

cracks
and

flashover

External
surfaces
of
all

parts
of

secondary
system
must
be
cleaned
to

reduce

possibility
of

voltage
loss
All

wires
should
be
removed
from
distrib

utor

cap
and
coil
so
that
terminals

can

be

inspected
and
cleaned
Burned
or

corroded
terminals
indicate
that
wires

are
not

fully
seated
which

causes

arcing
between
end
of
wire
and
ter

minal
When

replacing
wires
in

ter

minai
be

sure
they
are

fully
seated

before

pushing
rubber

nipple
down

over
tower
Check
distributor
rotor
for

damage
and
distributor
cap
for

cracks

CONDENSER

I
Clean

outlet
of
condenser
lead

wire

and
check
for

loose
setscrew

Retighten
if

necessary

2
Check

condenser
with
a
con

denser
tester

Condenser

capacity

0
20
to
0
24

IF

Micro
Farad

Condenser
insulation
resistance

5Mn

Mega
ohms

ADJUSTING

CARBURETOR
IDLE

RPM
AND
MIXTURE

RATIO

Cautions

a
On
automatic
transmission

equip

T
11
ped
models
check
should
be

per

fonned
in

the
D

position

Be
sure

to

engage
parking
brake
and

to
lock
both
front
and
rear

wheels

with
wheel
chocks

b

Keep
your
foot
down
on
the
brake

pedal
while

depressing
the
accelera

tor

pedal
Otherwise
vehicle

surges

forward

dangerously

Notes

a
Do
not

attempt
to
screw
the
idle

adjusting
sc
ew
down

completely

Doing
so
could
cause

damage
to

tip

which
in

turn
will
tend
to
cause

malfunctions

b

If
idle
limiter

cap
obstructs

proper

adjustment
remove
it

To
install
idle
limiter

cap
refer
to

Idle
Limiter

Cap

c

After
idle

adjustment
has

been

made
shift
the
lever
to
the
N
or

P

position
for
automatic
trans

mission

d
When

measuring
CO

percentage
in

sert

probe
into

tail

pipe
more
than

40
em
15
7
in

CO
idle

adjustment
with

CD
meter

Idle
mixture

adjustment
requires

the
use
of
a

CO
meter

especially
for

California
models
When

preparing
to

adjust
idle
mixture
it
is

essential
to

have
the
meter

thoroughly
warmed

up

and
calibrated

I
Check
carburetor

pipes
for

proper

connection

2

Warm

up
engine
until
water
tem

perature
indicator

points
to
the
middle

of

gauge
The

procedure
to
warm

up

engine
is
not

specifically
recom

mended
Either

driving
vehicle
or

oper

ating
engine
at

no
load
will
be

good

3
Make

sure
that
water
tempera

ture
indicator

points
to

the
middle

Further

keep
engine
running
at
about

2

000

rpm
for
about
5
minutes
with

out

applying
load
to

engine
in

order
to

stabilize

engine
condition
Engine

hood
should
be

open

4
Run

engine
for

about
10
minutes

at
idling
speed
During
this
10

minutes

proceeq
as
described
i

steps

5

to
9
below

5
Remove
air
hose
between
3

way

connector
5

way
connector
for
Cali

fornia
models
and
air

check
valve
as

shown
in

Figure
ET
17

Plug
the

dis

3
If
there

is
a
leak

remove

top

cover
from

purge
contiol
valve
and

check

for
dislocated
or

cmcked
dia

phragm
If

necessary
replace
dia

phmgm
kit

which
is
made

up
of
a

retainer

diaphragm
and

spring

I
@

1
Cover

2

Diaphragm

3
Retainer

4

Diaphragm
spring

Fig
ET
47
ET350

Carbon
caniater

purge

control
valve

Carbon
unlster

filter

Check
for
a
contaminated

element

Element
can
be
removed
at

the

bottom
of
canister

installed
on
vehicle

body

Fig
ET
48

Replacing
carbon

canister

filter

Fuel
tank

vacuum
relief

valve

operation

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
Engine
Tune

up

3
If
valve

is

clogged
or
if
no
resist

ance
is

felt

replace
cap
as
an
assem

bled
unit

r

u

ET369

Fig
ET
49
Fuel

filler
cap

CHECKING

CATALYTIC

CONVERTER

INSPECTION

Preliminary
inspection

Visually
check
condition
of
all

component
parts
including
hoses

tubes
and
wires

replace
if

necessary

Refer
to

Inspection
of
A
I

S
on

page
EC
17

Catalytic
converter

Whether

catalytic
converter
is
nOf

mal
or
not
can
be
checked

by
ob

serving
variation
in
CO

percentage

The

checking
procedure
is

as
follows

Apply
parking
brake
Shift

gears

into

Neutral
for
manual
transmission

and
Neutral
or
Park
for
automatic

transmission

1

Visually
check

catalytic
converter

for

damage
or
cracks

2
Remove
air

hose
between
5

way

connector
and
air

check
valve

Plug
the

disconnected
hose
to

prevent
dust

from

entering
Refer
to

page
ET
12

3
Check
carburetor

pipes
for

proper

connection

4

Warm

up
engine
sufficiently

5
Race

engine
1
500
to
2
000

rpm

two

or
three
times
under
no
load
then

run

engine
for

one
minute
at

idling

speed

6

Adjust
throttle

adjusting
screw

until

engine
attains
to

specified
speed

Refer
to

page
ET
12

7

Check

ignition
timing
If

neces

sary

adjust
it
to

specifications
Refer

to

page
ET
10

ET
23
8

Adjust
idle

adjusting
screw
until

specified
CO

percentage
is

obtained

Refer
to

page
ET
12

9

Repeat
the

adjustment
process
as

described
in

steps
5
to

8
above
until

specified
CO

percentage
is

obtained

Note

Adjustment
in

step
9
should
be

made
ten
minutes
after

engine
has

warmed

up

10
Race

engine
1
500
to
2
000

rpm
two
or
three
times
under

no
load

and
make

sure
that

specified
CO

per

centage
is
obtained

I
1
Remove

cap
and
connect
air

hose
to
air
check
valve

If

idling

speed
increases

readjust
it

to

specified
speed
with
throttle
ad

justing
screw

12
Warm

up
engine
for
about
four

minutes
at
2
000

rpm
under
n
load

13
Measure

CO

percentage
at

idling

speed
After

step
12
has
been
com

pleted
wait

for
one
minute
before

making
CO

percentage
measurement

14

If
CO

percentage
measured
in

step
13
is
less
than
0
3
the

catalylic

converter
is

normal

15
If
CO

percentage
measured
in

step
13
is

over
0
3
recheck
A
I
S

and

replace
air

check
valve
Then

perform
inspection
steps
12

and
13

16
If
CO

percentage
is
still

over

0
3
in

step
15

catalytic
converter
is

malfunctioning
Replace
catalytic
con

verter

CHECKING
FLOOR

TEMPERATURE

WARNING
SYSTEM

INSPECTION

Floor

warning
temperature

system

Apply
parldng
brake
Shift

gears

into
Neutral
for

manual
transmission

and
Neutral
or
Park
for
automatic

transmission

1

Ensure
that
floor
tern

perature

warning

lamp
lights
when

ignition

switch
is

turned
to
the
S

position

If
not
check

lamp
for
burned

bul
bs

Condition

ENGINE
POWER
NOT

UP
TO
NORMAL

Low
compression

Ignition
system
out
of

order

Fuel

system
out

of

order

Air
intake

system
out

of
order

Emission
control

Overheating

O

cooIing

Others
Engine
Tune

up

Probable
cause

Incorrect

iSnition
timing

Damaged

spark
plugs

Worn
distributor

points

Malfunction
of
choke

system

Clogged
fuel

pipe
or

floating
valve

Dirty
or

clogged
fuel
strainer

Fuel

pump
will
not
work

properly

C10ssed
carburetor

jets

Malfunction
of
altitude

compensator

CIOJBed
air
cleaner

Ail

inhaling
from
manifold

gasket
or

carburetor

gasket

Malfunction
of

E
G
R
valve

Stick
E
F
E

valve
shaft

Insufficient
coolant

Loose
fan
belt

Worn
or
oiled
fan
belt

Inoperative
thermostat

Worn
water

pump

Clogged
or

leaky
radiator

Worn
radiator
filler

cap

Ail

in

cooling
system

Improper
engine
oil

grade

Incorrect

ignition
timing

Clossed
carburetor
lean
mixture

Disconnected
altitude

compensator
hOlle

Inoperative
thermostat

Improper
octane
fuel

L

j
tire

pressure

Dragging
brake

Clutch

slipping

ET

30
Corrective
action

Previously
mentioned

Adjust

Clean

adjust
or

replace
plull

Dress

or

replace
points
Also
check

condenser

Adj
lst

Clean

Replace

Repair
or

replace

Disassemble
and
clean

Check
and

replace

Replace
element

Replace
gasket

Check
and
replace

Repair

Replenish

Adjust
fan
belt

Replace

Replace

Replace

Flush

repair
or

replace

Replace

Retighten
each

part
of

cooling
system

Replace
with

proper
grade
oil

Adjust

Overhaul
carburetor

Connect

Replace

Replace
with

specified
octane
fuel

Inflate

to

specified

pressure

Adjust

Adjust

Except
transistor

ignition
system

ELECTRIC
AUTOMATIC

CHOKE

An
electric
heater
wanns
a
bi
metal

interconnected
to
the
choke
valve
and

controls
the

position
of
choke
valve

and
throttle
valve
in
accordance
with

the

time

elapsed
the
warm

up
condi

tion

of
the

engine
and
the

outside

ambient

temperature

When
outside
ambient

temperature

is

above

operating
temperature
the

automatic

choke
control
serves
to
fur

ther
reduce
exhaust

gasemission

during
warm

up
by
automatically

selecting
one
of
the
two

choke

opera

tion
modes
fast

acting
or
slow

acting

Slow

acting
choke

operation

When
ambient

temperature
is
low

electric
current
flows

through
the

automatic

choke

relay
to
the
P
T
C

heater
A

and

gradually
warms
the

bi

metal
This
causes
the
choke
valve

to

open
slowly

Fast

acting
choke

operation

When
ambient

temperature
is

high

the
bi
metal
switch
is
in

on
This

causes
electric

current
to
flow

through

the
automatic

choke

relay
to
the

P

T
C
heater
A
and
heater

B
result

ing
in

quick

opening
of
the

choke

valve

r

@@

r

@
Engine
Fuel

The

construction
and

function
of

each

part
of

this
carburetor
are
as

follows

l
Bi
metal
and
heater
in
choke

cover

Electric
current

flows

through
the

ttea
r
as

t
le
engine
tl

1
SI
nd
war

the
bi
metal

The
deflection
of
the

bi
metal
is
transmitted
to
the
choke

valve

through
the
choke

yalve
lever

2
Fast
idle
cam

The
fast
idle

cam
determines
the

opening
of
the
throttle
valve

so
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

depend

ent

upon
the
warm

up
condition
of

the

engine

3

Fast
idle

adjusting
screw

This

screw

adjusts
the

opening
of

the
throttle

valve
of
the
fast

idle
earn

4
U

nloader

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

liUle
so

as
to
obtain

an

adequate

air
fuel

mixture

5

Vacuum

diaphragm

After

the

enginThas
been

started

by
cranking
this

diaphragm
forces

the

choke
valve

open
to
the

predetermined

extent
so

as
to

provide
the

proper

air
fuel
ratio

6
Bi
metal

case
index
mark

The
bi
metal

case
index
mark
is

used

for

setting
the

moment
of
the

D

Il

EF232

1

Alternator

2
Automatic
choke

relay

3
Automatic
choke
cover

4
P

T
C
heater
A

5
Bi
metal
switch

6
P

T
C
heater
B

7
Bi
metal

8
Choke
valve

Fig
EF
33
Schematic

drawing
of
electric
automatic
choke
heater

EF

20
bi
metal
which

controls
the
air

fuel

mixture
ratio

required
for

starting

DASH
POT

SYSTEM

These
carburetors
are

equipped

with

a
dash

pot

interl
ked
wi
h

the

primary
throttle

valve

through
a
link

mechanism
The

dash

pot
is
intended

to

prevent

engine
stall

resulting
from

quick
application
of
the
brake
or

from
the

quick
release
of
the
accele
ra

tor

pedal
after

treading
it

slightly

In

such
a

situation
a
throttle
lever

strikes

against
the
dash

pot
stem
and

makes
the

primary
throttle
valve
close

gradually
thus

keeping
the

engine

running

ALTITUDE
COMPENSATOR

California
models

The

higher
the
altitude
the
richer

the
air

fuel
mixture
ratio
and
there

fore
the

higher
exhaust

gas
emissions

even

though
the

engine
is

properly
ad

justed
for
low

altitude

driving

The
altitude

compensator
is

design

ed

to
meet
EiiriSSion
S13ndards
for

driving
in
both
low
and

high
altitudes

At

high
altitudes
additional
air
is

sup

plied
to
the
carburetor

by
the
altitude

compensator
When
the
altitude

com

pensator
lever

is
set
at
H
air
is

conducted

through
an
air

passage
to

the

carburetor
The
air

passage
is

closed
when
the
lever

is
set
at
L

H

L
Lever

When

operating
the
H

L
lever
fol

low
these

instructions

H

position

Should
be
used
for

general
driving

in

those
areas

designated
by
law

as

High
Altitude
Counties

L

position

For
use
outside
those
areas

desig

nated
as

High
Altitude
Counties

Notes

a

The
idle

rpm
and
CO

vary
accord

ing
to
the
altitude
Therefore

they

should
be

properly
adjusted
when

the

position
of
the
H
L
lever
is

changed

EF729

ADJUSTMENT

AND
INSPECTION

CARBURETOR
IDLE
R
P
M

AND
MIXTURE
RATIO

Cautions

3
On

automatic
transmission

equi

ped
models
check
should
be

per

formed
in

the
0

position

Be
sure
to

engage

parking
brake
and

to
lock
both
front
and

rear
wheels

with
wheel
chocks

b

Keep
your
foot
down
on
the
brake

pedal
while

depressing
the
accelera

tor

pedal
Otherwise
vehicle

surges

forward

dangerously

Notes

a
00
not

attempt
to
screw
the
idle

adjusting
screw
down

completely

Ooing
so
could
cause

damage
to

tip

which
in
turn
will
tend
to
cause

malfunctio11ll

b
If
idle
limiter

cap
obstructs

proper

adjustment
remove
it

To
install
idle
limiter

cap
refer
to

Idle
Limiter

Cap

c
After
idle

adjustment
has
been

made
shift
the
lever
to
the
N

or

P

position
for
automatic
trans

mission

d
When

measuring
CO

percentage
in
Engine
Fuel

b
Counties
1

219
m
4
000
ft
or

more
above
sea
level
have
been

designated
by
law
as

High
Altitude

Counties
For

further
details
refer

to
1977
OATSUN
PICK
UP
Service

Bulletin
Pub
No
257

0

I
Air
cleaner

rID
mOl

If
Low
altitude

Ll

n
n

L
n

Fig
EF
34

sert

probe
into
tail

pipe
more
than

40
em

15
7
in

CO
Idle

adjustment
with

CO
meter

Idle
mixture

adjustment
requires

the
use
of
a

CO
meter

especially
for

California
models
When

preparing
to

adjust
idle
mixture
it
is

essential
to

have

the
meter

thoroughly
warmed

up

and

calibrated

I

Check
carburetor

pipes
for

proper

connection

2
Warm

up

engine
until
water

tem

perature
indicator

points
to
the
middle

of

gauge
The

procedure
to
warm

up

engine
is
not

specifically
recom

mended
Either

driving
vehicle
or

oper

ating
engine
at

no
load
will

be

good

3
Make
sure
that
water

tempera

ture
indicator

points
to
the
middle

Further

keep

engine
running
at
about

2
000

rpm
for

about
5

minutes
with

out

applying
load
to

engine
in

order
to

stabilize

engine
condition

Engine

hood
should
be

open

4
Run

engine
for
about

10
minutes

at

idling
speed
Ouring
this
10

minutes

proceed
as
described
in

steps

5

to
9
below

5
Remove
air

hose
between
3

way

connector
5

way
connector
for
Cali

fornia
models
and
air

check
valve
as

EF
21
shown
in

Figure
EF
35

Plug
the
dis

connected
hose

to

prevent
dust

from

entering

0

o

EF259

Fig
EF
35
Disconnecting
air
hose

from
air
check
valve

6
Race

engine
I
500

to
2
000

rpm

two
or
three
times

under
no
load
then

run

engine
for
one
minute
at

idling

speed

7

Adjust
throttle

adjusting
screw

until

engine
is

at

specified
speed

Engine
speed

Manual
transmission

750

rpm

Automatic
transmission

in
0

position

650

rpm

8
Check

ignition
timing
If
neces

sary
adjust
it
to

specifications

This

operation
need
not
be
carried

out
at
1

600
Ian
1

000
miles
service

Ignition
timing

Manual
transmission

120
750
rpm
Non
California

100
750

rpm
California

Automatic
transmission

in
0

position

120

650

rpm

9
At

about
10
minutes

after

engine

is
run

at

idling
speed
adjust
idle

adjusting
screw
so

that
CO

percentage

is
at

specified
level

CO

percentage

Manual
transmission

2
t
l

at
750

rpm

Automatic

transmission

in
0

position

2
t
I
at
650

rpm

10

Repeat

procedures
as
described

in

steps
6

7
and
9
above

so
that
CO

percentage
is
at

specified
level
Check

ing
idle
CO
in

step
9
can

be
carried
out

right
after

step
7

II
Race

engine

1
500
to
2

000

EC527

Fig
EF
39
Mea

uring
throttle
valve

clearance

MfT

AfT

3
To

check
fast

idling
cam

setting

by
engine

speed
proceed
as
follows

Warm

up
engine
sufficiently
Set
Engine
Fuel

Fast

idling
earn

steps

o

04th

l

2nd

1st

EC528

Fig
EF
40
Fast

idling
cam

steps

2
The
clearance
should
be

specified

value
in

the

following
table
If
not
ad

just
the
clearance

by
turning
fast

idling
screw

Clearance
A
mm
in

1
33
to
I

47
0

0524
to
0

0579

1
58
to
1

72
0

0622
to
0

0677

fast

idling
cam
at
2nd

step
and
read

engine

speed
Fast

idling
cam
is

prop

erly
set
if

engine
speed
is
within

Engine
speed

rpm
Fast

idling
earn

MfT

AfT

VACUUM
BREAK

I

Close
choke
valve

completely

2
Hold
choke
valve

by
stretching
a

rubber
band
between
choke

piston

lever
and

stationary
part
of
carburetor

3

Grip
vacuum
break
rod
with

pliers
and

pull
straight
out

4
Under
this
condition

adjust
the

clearance
between
choke
valve
and

carburetor
body
B
in

Figure

EF
42
to

specified
value

by
bending

vacuum
brake
rod
I
900
to
2
800

2nd

step

2
200

to
3
200

S
B

j
CK
iXo

LL

r
I

il

L
J

1

Choke

piston
rod

2

Choke

spring

3
Choke

piston
EF516

4

Diaphragm
cover

5
Choke

piston
lever

6
Choke
valve

Fig
EF
42

Adjusting
vacuum
break

EF
23
Z

ET033
Fast

idling
carn

Nut

Fast

idling
screw

Choke
valve

Choke

connecting

rod

Throttle
valve

Fig
EF
41

Adjusting
the
clearance

of
throttle
valve

Fast

idling
earn

1st

step

specifications
below
Clearance
A
in

2nd

step
is

reference
value

Clearance
A

mm
in

0
94
to
1
18
0
0370
to
0
0465

L16
to
I
40
0
0457

to
0
0551

CHOKE
UNLOADER

Close
choke
valve

completely

2
Hold
choke
valve

by
stretching
a

rubber
band
between
choke

piston

lever
and

stationary
part
of
carburetor

3
Pull
throttle
lever
until
full

open

Under
this
condition

adjust
clear

ance
between
choke
valve
and
carbure

tor

body
to

2
45
mm
0
096
in

by

bending
unloader

tongue

Note
Make
sure
that
throttle
valve

opens
when
carburetor
is
mounted

on
the
vehicle

If
throttle
valve
rails
to

open
un

loader
becomes

inoperative
resulr

ing
in

poor
acceleration
after

engine

is
started

REMOVAL

AND

INSPECTION

Removal
and

inspection
can
be

done

as
follows

Removal

Catalytic
converter

1

Apply
parking
brake

2

Place
wheel
lock
under
each
tire

3

Jack

up
the
vehicle

4
Remove
lower
shelter
of

catalytic

converter

5
Dismount

catalytic
converter

EC453

Fig
EC
69
Removing

catalytic

conuerter

Inspection

Preliminary
inspection

Visually
check
condition
of
all

component
parts
including

ho
s

tubes
and
wires

replace
if

necessary

Refer
to

Inspection
of
A
I
S
on

page
EC
17

Catalytic
converter

Whether

catalytic
converter
is
nor

mal
or
not
can
be
checked
by
ob

serving
variation
in

CO

percentage

The

checking

procedure
is

as
follows

Apply
parking
brake
Shift

gears

into
Neutral
for
manual
transmission

and
Neutral
or
Park
for
automatic

transmission

1

Visually
check

catalytic
converter

for

damage
or
cracks
Emission
Control

System

2
Remove
air
hose
between

5

way

connector
and
air
check
valve

Plug
the

disconnected
hose
to

prevent
dust

from

entering
Refer
to

page
ET
12

3

Check
carburetor

pipes
for

proper

connection

4

Warm

up
engine
sufficiently

5

Race

engine
1

500
to
2
000

rpm

two
or
three
times

under
no
load
then

run

engine
for
o
e
minute
at

idling

speed

6

Adjust
throttle

adjusting
screw

until

engine
attains
to

specified
speed

Refer
to

page
ET
10

7
Check

ignition
timing
If
neces

sary
adjust
it
to

specifkations
Refer

to

page
ET
10

B

Adjust
idle

adjusting
screw
until

specified
CO

percentage
is

obtained

Refer
to

page
ET
12

9

Repeat
the

adju
stment

process
as

described
in

steps
5
to
8
above

until

specified
CO

percentage
is
obtained

Note

Adjustment
in

step
9
should
be

made
ten

minutes
after

engine
has

wanned

up

10
Race

engine

1
500
to
2
000

rpm
two
or
three
times

under
no
load

and
make
sure
that

specified
CO

per

centage
is
obtained

11
Remove

cap
and
connect
air

hose
to

air
check
valve

If

idling

speed
increases

readjust
it

to

specified
speed
with
throttle
ad

justing
screw

12
WaRn

up
engine
for

about
four

minutes
at
2
000

rpm
under
no
load

13
Measure
CO

percentage
at

idling

speed
After

step
12
has
been
coin

pleted
wait

for
one
minute
before

making
CO

percentage
measurement

14
If
CO

percentage
measured
in

step
13
is
less
than
0
3

the

catalytic

converter

is
normal

15
If
CO

percentage
measured
in

step
13
is
over
0
3

recheck
A
I
S

and

replace
air
check
valve
Then

perform
inspection
steps
12
and
13

EC
27
16
If
CO

percentage
is

still
over

0
3
in

step
15

catalytic
conyerter
is

malfunctioning
Replace
catalytic
con

verter

INSTALLATION

To
install

reverse
the
removal

pro

cedure

Bolt

lightening

torque

specifications

Tightening

torque

Catalytic
converter

2
6
to
3
4

kg
m

19
to
25
ft
Ib

FLOOR

TEMPERATURE

WARNING
SYSTEM

DESCRIPTION

The
floor

temperature
warning

system
consists
of
a
floor

temperature

sensing
switch
installed

on
the
vehi

cle
s
floor
floor

temperature
relay
and

a

warning

lamp
on
the
instrument

panel
and
wires
that
connect
these

parts

When
the
floor

tempera
ture
rises
to

an
abnormal
level
the

warning
lamp

will

light
to
call
the
attention
of
the

driver
The

wiring
diagram
of
this

system
and
location
of
the

floor

temperature
sensing
switch
are
ilIus

trated
in

Figures
EC
70
and
EC
71