parking 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

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

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

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

Floor
temparature
warning

lamp

Refer

to

Figure
EC
74

for
the

loca

tion
of
this

part

L

1t

1

RAt

Fig
EC
74
Location
of
floor

temperature
warning
lamp

INSTALLATION

To
install
reverse
the
order
of

rem
ovaL

INSPECTION

Floor
warning
temperature

system

Apply
parking
brake
Shift

gears

into
Neutral
foI
manual
transmission

and
Neutral
or
Park
for
automatic

transmission

1
Ensure
that
floor

temperature

warning

lamp
lights
when

ignition

switch
is
iumed

to
the
S

position

If

not
check

lamp
for
burned

bulbs

Replace
bulb
if
bulb
is
burned
out

If

bulb
is

not
burned
trace
wire
s

back
to

ignition
switch

Repair
or

replace
if

necessary

2
Be

sure
that
floor

temperature
is

cool
below
800C

1760Fj
before

carrying
out
the

following
procedure

I
Remove
rearseat

2

Ignition
switch
is

turned
to
the

IG

position

3
Ensure
that
floor

temperature

warning
lamp
goes
out

4
Heat

surrounding
areas
of
floor

temperature
sensing
switch
with
a

proper
heater
to
ensure
that
floor

temperature
warning
lamp
glows
when

floor
is
heated

to
the

specifications
as

shown
in
the
table
below
Emission
Control

System

Temperature

sensing
switch

Contact
close
Temperature

warning
lamp

Off

Contact
open
On

Note

Avoid

heating
floor

tempera

ture

sensing
switch

directly

If

lamp
does

not
glow
check
floor

temperature
sensing
switch
connector

for

continuity
with

a
circuit
tester

If

continuity
should
exist
after

heated

surrounding
areas
of
floor
tem

perature
sensing
switch

replace
tem

perature
sensing
switch

If
con

tinuity
does

not
exist

trace

the

wiring
back
to

relay
or
check
the

following
step
3

Repair
or

replace

wire
s
if

necessary

Note
The

floor

temperature
sensing

switch

may
be
heated

through
the

floor

by
a

proper
heater

3
Turn

ignition
switch
to
the

IG

position
and
disconnect
floor

temper

ature

sensing
connector
The

lamp

should
remain

on
If

not
check
floor

temperature
relay
for

continuity
with

2
00

r
I

141

J

To
floor

temperatwe

warning
lamp

2
From

S

position

3
From

IG

position

4

From

ignition
switch

5
To
floor

temperature

sensing
switch
O

When
floor

temperature

warning
lamp
lights

Check
floor

temperature
warning

lamp

1

Open
or

shorj
circuit
in

wiring

harness

2

Check
fuel

system
with

regard
to

the

following
items

Refer
to

Inspec

lion
of
Fuel

System

EC
29
Floor

temperature

Below
1050C
221
OF

Above

1050C
221
OF

a
circuit

tester

Referring
to
the

following
floor

temperature
relay
if

relay
is
normal

trace
wire
s

back
to

ignition
switch

Repair
faulty
wiring

Floor

temperature
relay

When

checking
floor

temperature

relay
for
unit

remove
it
and

proceed

as
follows

1

Check
for

continuity
between

@

and

ID
Continuity
should
exist

Check
for

continuity
between

CD

and@
Continuity
should
exist

Check
for

continuity
between

CD

and

@
Continuity
should
not

exist

2

Apply
a
12

volt
doc
across

@
and

ID
to

ensure
that

continuity
exists

between

CD
and

@
and
that

con
ti

nuity
does

not
between

CD
and

@
If

test
results
dn

not

satisfy
the
above

replace
the

floor

temperature
relay

EC344

Fig
EC
75

Checking
floor
temperature
relay

1
Float
level

2
Choke

3

Normal
fuel

supply
system
Prima

ry
and

secondary

4
Accelerator

pump

5
Power
valve

6
B
C
D
D

7
Fuel
strainer

8
Air
cleaner

Automatic
Transmission

HYDRAULIC

CONTROL
SYSTEM

FUNCTIONS
OF
HYDRAULIC
CONTROL

UNIT
AND
VALVES

OIL

PUMP

MANUAL
LINKAGE

VACUUM
DIAPHRAGM

DOWNSHIFT
SOLENOID

GOVERNOR
VALVE

CONTROL
VALVE

ASSEMBLY

HYDRAULIC
SYSTEM
AND

MECHANICAL
OPERATION

FUNCTIONS
OF

HYDRAULIC
CONTROL

UNIT
AND
VALVES

The

hydraulic
control

system
con
CONTENTS

P
RANGE
PAR

K

R

RANGE
REVERSE

N

RANGE

NEUTRAL

D1
RANGE
LOW
GEAR

D2
RANGE

2ND
GEAR

D3
RANGE
TOP
GEAR

D
RANGE
KICK

DOWN

2

RANGE
2ND
GEAR

t
RANGE
LOW
GEAR

12
RANGE
2ND

GEAR
AT
4

AT
4

AT
4

AT
5

AT
5

AT
5

AT

6

AT13

tains

an
oil

pump
for

packing
p
oil

from
the
oil

pan
through
the
oil

strainer
A

shift
control
is

provided
by

two

centrifugally
operated
hydraulic

governors
on
the

output
shaft

vacuum

control

diaphragm
and
downshift
AT14

AT16

AT18

AT

20

AT

22

AT

24

AT

26

AT

28

AT

30

AT

32

solenoid

These

parts
work
in

conjunc

tion

with
valves

in
the
valve

body

assembly
located
in

the
base
of
the

transmission
The
valves

regulate
oil

pressure
and
direct
it

to

appropriate

transmission

components

Oil

pump
I
I

Control
valve
I

Torque
converter

1

I
I

I

Manual

linkage
Front
clutch

Vacuum

diaphragm
I

Rear
clutch

I
Low
and

reverse
brake

Downshift
solenoid

I
Band
brake

Governor
valve

r
I
Lubrication

OIL
PUMP

The
oil

pump
is

the
source
of

control
medium
i

e
oil
for
the

control

system

The

oil

pump
is

of
an
internal

involute

gear
type
The
drive
sleeve
is
a

part
of
the

torque
converter

pump

impeller
and

serves
to
drive
the

pump

inner

gear
with
the
drive
sleeve
direct

ly
coupled
with
the

engine
operation

The
oil
flows

through
the

following

route

Oil

pan
Oil

strainer
bottom
of
the

control
valve

Control
valve
lower

body
suction

port
Transmission

case

suction

port

Pump
housing
suction

port
Pump
gear

space
Pump
housing
delivery
port
Transmission

case

delivery

port
Lower

body

delivery

port
Control
valve
line

pressure
circuit

AT071

I
Housin
4

Inner

gear

2

Cover

5
Crescent

3
Ouler

gear

Fig
AT

3
Oil

pump

AT
4
MANUAL

LINKAGE

The
hand

lever
motion
the
hand

lever
is
localed
in

the
driver
s

compart

ment

mechanically
transmitted
from

lhe
remote

control

linkage
is

further

transmitted
to

the
inner

manual
lever

in
the
transmission

case
from
the

range

selector
lever
in
the

right
center

par

tion
of
the
transmission

case

through

the

manual
shaft
The
inner

manual

lever
is

thereby
turned

A

pin
installed
on

the
bottom
of

the
inner

manual
lever

slides
rhe
manu

al
valve

spool
of
the

conlrol
valve
thus

positioning
the

spool
opposite
rhe

appropriate
select

posilion

The

parking
rod

pin
is

held
in
rhe

groove
on
the

top
of
Ihe
inner

manual

Automatic
Transmission

P

RANGE
PARK

The

operation
of
clutches
and

band

are
functionally
the
same
as
in

Neu

tral

In

parking
however
when
the

parking
pawl
meshes
in

a

gear
which
is

splined
to

the

output
shaft
the

output

shaft
is

mechanically
locked
from

rotating
Free
Lock

AT086

Fig
AT

24

Parlling
mechanum

The
oil

discharged
from
the
oil

Low
Band
ervo
On

pump
is

fed
to
each

part
in
a

similar
Gw
Clutch

Parkin

Range

atia
Il

Yer5e

r

pawl

manner
to
that
of
the
N

range
The
Fron
Rear
brakt

Operation
Release
clutch

oil

having
the
line

pressure
7
which

Park
on

has
been
introduced
into

the
manual

valve

Il
reaches
the
I

st
2nd
shift
Re
er
2
132
on
on
on

valve

CID
through
the
line

pressure

circuit

5
As
the
1st
2nd
shift
Neutral

valve
s
force
to
th

right
hand
ide
PI
L
w
2
3
on

by
the

spring
the
line

pressure
5
and

Drive
P2
Second
14S3
on
on

12
actuates
the
low
and
reverse

brake

through
the
groove
Also
Ihe
03

Top
1
000
on
on

parking
pawl
engages
with
the
outer

2
Second
1
458

teeth
of
the
oil
distributor

by
means

of
the

manual
lever
mechanically
12
Second
1458
on
on

locking
the

output
shaft

II
Low
2
453
on

AT
14

D
RANGE
LOW
GEAR
Automatic

Transmission

The
low

gear
in
D

range
is

somewhat
different

from
that
in
I

range

The
rear

c1utdl
is

applied
as
III

I

range
but

the
one

way
clutch

holds

the

connecting
drum
The

power

now
is

the
same
as
in
1

J
range
That

is

the

power
now
takes

place

through

Ihe

input
shaft
and
into

the
rear

clutch
The

input
shaft
is

splined
to

the

rear
clutch

drum
and
drives
it

Rotation
of
Ihe

rear
clutch
drives
the

rear
clutch
hub

and
front
internal

gear

The
front
internal

gear
rotales
the

front

planetary
gears
clockwise

to

cause
the
sun

gear
to
rotate
counter

clockwise

Counterclockwise

rotation

of
the

sun

gear
turns
the

rear

planetary

gears
clockwise

With
the

rear

plane

tary
carrier

held

stationary
by
the

one

way
clutch
the
clockwise

rotation

of

the
rear

planetary
gears
rotates
the

rear
internal

gear
and
drives

the

flange

clockwise
The

internal
drive

flange
is

splined
to
the

outpul
shaft
and
rotates

the

output
shaft
clockwise

When

the
manual
valve
is

posi

tioned
at
D

the
line

pressure
7

introduced

into
the
manual

valve
is

led

to
the
line

pressure
circuits

l
2

and
3

The

pressure
in

the
circuit
I

acluates
the
rear

clutch
and
the

gover

nor
and
al
the

same
time

operates
the

1st

2nd
shift

valve

CID
to

change
the

speed
The

circuit
2

leads
to

the

second
lock

valve

@
The

circuit
3

actuates

the
2nd
3rd
shift

valve

@

for

the
2nd
3rd

speed

change
and

at
the
same

lime
locks
the

second

lock
valve

@

The

throttle

pressure
16
which

changes
with
the

degree
of
accelerator

pedal

depression

presses
Ihe

pressure

regulator
valve

CD
and

increases
the

line

pressure
7

When

Ihe

speed
of

the

vehicle
has

increased
the

governor

pressure
15

introduced
from

the
line

pressure
circuit
I

actuates
the

I

SI
2nd

shift
valve

CID
2nd
3rd

shift

valve

@
and

pressure
modifier

valve

ID
When
the

governor

pressure

is

high
the

pressure
modifier
valve

ID

acls
in

such
a

direction
as

to

compress

the

spring
and

the

throttle

pressure
is

led
to
the

throttle

pressure
18
This
ATOSO

Fig
AT
30
Power

transmission

during
D

J

range

liIIl

I
IW
L

AT08l

Fig
AT
31

Operation
of
each
mechanism

during
VJ

range

Clutch
low
Band
servo
On

Parking
Cur

Ran
Rllelle

way

pawl
ratio

Front
Rur

brake
Operation
Rekase

ch
lch

Park
on

on

RellerK
2
t82
on
on
on

Neutral

01
low
2
S8
on
on

Orivt
02
Second

1
458
on
on

OJ

Top
1000
on

on
on
on

2
Second
1
458
on
00

t2
Second
1
458
on
on

t

tt
low
2
458
on
on

pressure
acts

against
the
force

of
the

spring
of

the

pressure

regulator
valve

CD
and

also

against
the

throttle

pres

sure

16
thus

lowering
the
line

pres

sure
7

The

governor

pressure
also
increases

with
the

speed
of
Ihe

vehicle

exerting

a

pressure
on

one
side
of

the

lst
2nd
shift
valve

and
counter

acts

the
Ihrottle

pressure
19

line

pressure

AT
20
l
and
the

spring
which

are

exerting

against

t
1e
governor

pressure
There

fore
when

the

governor

pressure
ex

ceeds

Ihis

pressure
the

speed
is

shifted

from

the
I
st

gear
to

the
2nd

gear

The
further
the

accelerator

pedal
is

depressed
the

higher
becomes

the

throttle

pressure
19

increasing
the

governor
pressure
and

shifting
the

speed
change
point
to

the

higher
side