1979 DATSUN 210 check engine

Automatic
Transmission

TROUBLE
SHOOTING
GUIDE
FOR
3N71B

AUTOMATIC
TRANSMISSION

Ordel
Test
item

Checking
Oil
level

gauge

j
Downshift
solenoid

3
Manual

linkage

4

Inhibitor
switch

5

Engine
idling
rpm

6
Vacuum

pressure
of
vacuum

pipe

7

Operation
in
each

range

g

Creep
of

vehicle

Stall
test
1
Oil

pressure
before
t
sting

2
Stall
test

3

Oil

pressure
after

teSling

Road
test
L

Slow
acceleration

Ist
2nd

2nd
3rd

2

Quick
acceleration

Ist
2nd

2nd
3rd

3
Kick
down

operation

3rd
2nd
or
2nd
1st
Procedure

Check

gauge
for
oil
level
and

leakage
before
and
after
each

test

Check
for
sound
of

operating
solenoid
when

depressing

accelerator

pedal
fully
with

ignition
key
ON

Check

by
shifting
into

P
R
N
0
2
and

ranges
with
selector
lever

Check
whether
starter

operates
in
N
and
p

ranges
only

and
whether
reverse
lamp
operates
in
R

range
only

Check
whether

idling
rpm
meet
slandard

Check
whether
vacuum

pressure
is
more
than
450

mmHg

17

72

inHg
in

idling
and
whether
it

decreases
with

increasing
rpm

Check
whether
transmission

engages
positively
by

shifting

N

0
N

2
N
to
I

and
N
R

range

while

idling
with

brake

applied

Check
whether
there
is

any
creep
in

0
2

and

R

ranges

Measure
line

pressures
in
D
2
I
and
R

range
while

idling

Measure

engine
rpm
and
line

pressure
in
0
2
t

and

R

ranges
during
full
throttle

operation

Note

Temperature
of

torque
con
erter
oil
used
in

test

should
be
from
6

to
lOO

C
140
to
2120F

i
e
suf

ficiently
1

up
but
not

o
heeted

CAUTION

To
cool
oil
between
IIch
mil

test
for
OH
ZH
1
H

Ind

RH

nnges
idle

engine
i
e

rpm
It
Ibout

1
200

rpm
for

more
thin
1
minutll
in

P

nnge
MeeRlr
ment
time

mUlt

not
be
more
then
5

seconds

Same
as
item
1

Check
vehicle

speeds
and

engine
rpm
in

shifting
up
1

st

2nd

range
and
2nd
3rd

range
while

running
with
lever
in

D

range
and

engine
vacuum

pressure
of
about

200

mmHg

7
87

inHg

Same
as
item

1
above

except
with

engine
vacuum

pressure
of

o

mrnHg
0

inHg
i
e
in

position
just
before
kickdown

Check
whether

the
kickdown

operates
and
measure
the
time

delays
while

running
at
30
40

50
60
70
km
h

19
25
31

37
43

MPH
in

OJ
range

AT
49

Oldel

Others
Automatic
Transmission

Test
item

4
Shift
down

Or
O
O

5
Shift
down

Or
I

1

6
Shift
down

0
2

7
Shift

up

1
1

8
Shift

up
or
down
when
start

ing
in

2

ranae

9

Parking

Abnormal
shock
oil

leakage
Procedure

Check
vehicle

speeds
and

engine

rpm
in

shifting
down
from

3rd
2nd
1st

sequentiaUy
while

coasting
with

accelerater

pedal
released
in
0

range
and

engine
vacuum

pressure
of
about
450

mmHg
17
72

inHg

Check
for
shifti

ng
do
n

I
I
nd

engine
blaking
and

further
for

shifting
down
I
I
and

engine
braking
tel

shifting
the
leyer
into

I

range
with
the
accelerator

pedal

released
and
the

engine
vacuum

pressure
of
0

mmHg
0

inHg

while

driving
at
about
50
km
h
30

MPH
in
0

range

Check
for

quick
shifting
down

OJ
2
and

engine
braking

after

shifting
the
lever
into
2

range
while

driving
at
about

50

km
h
30
MPH
in

0

range

Further
chec
for

locking
of
the
transmission
i

2nd

gear

ratio

regardless
of
vehicle

sPeed

Check
for
failure
of
the
transmission

to
shift

up
during

acceleration
when

starting
in

range

Check
the
transmission
for
not

shifting
up
or
down

during

acceleration

or
deceleration
when

starting
in

2

range

Confirm
that
yehicle
will
notmoye
on

grade
when

shifting

to
pn

range

Enter
into
record
conditions
observed

durq
these
lests

such
as

gear
noise

abnormal
clutch
noise

and
acceleration

performance

AT

50

Fig
FA
3

Installing
Coller
Pin

II
Install
hub

cap
with
new
Q

ring

and
wheel

WHEEL
ALIGNMENT

Correct
front
wheel

alignment
as

sures

proper
car

handling
characteris

tics

and
minimum

steering
effort
with

the
least

amount
of
tire

wear
Before

adjusting
front
wheel

alignment
be

sure
to
make

preliminary
inspection
of

front
end

parts

Tire

pressure
and
balance

Wheel

bearings
and
wheel

bearing

nuts

Steering
gear

play

Steering
gear
housing
loose
at
frame

Steering
linkage
and
connections

Shock
absorber

operation

If

wrong
repair
or

replace
the

damaged
portion
or

parts

When

using
equipment
for
front

wheel

alignment
inspection
follow
the

instructions
furnished
with

equipment

Note

Inspection
should
be

made
with

the
car
set
Ievel
and
at
curb

weight

Cember
end
caster

Camber
and
caster
are

preset
at

factory
and

cannot
be

adjusted

The

car

requires
only
toe
in

and
car

posture
adjustment

Note
If
camber

or
caster

alignment
is

not
within

specifications
check
as

sociated

parts
Repair
or

replace
as

necessary
Front
Axle
Front

Suspension

Toe
In

Measure
toe
in
and

adjust
as
neces

sary
For

adjustment
carry
out
the

following
procedure

1

With

steering
wheel
at

its

straight

ahead

position
check
front
wheels
to

see
if

they
are
set
in

straight
ahead

positions

2
Toe
in

can
be

adjusted
by

varying

length
of

steering
side
rods

Note

a
Loosen

lock
nuts
and

turn
left
and

right
side

rods

equally

b

Turning
side
rods
in
forward
direc

tion
of

car
inaeases
toe
in

c
If
side
rods
have
been

disassembled

set
at

specified
distance
A

be

forehand
when

reassembling

d
Be
sure
to
s
w
side
rods
into
ball

joint
sockets

more
than
20
mm

0
79
in

A
315
mm
12
40
in

EfJK

Toe
in
Unladen

1
to
3
mm

0

04
to
0
12
in

Unladen
means

the

following

conditions

Tankful
of
fuel
radiator
filled
and

engine
oil
full

Spare
tire

jack
hand
tools
mats
in

design
position

All

tires
inflated
to

specified

pres

sure

All
excessive
mud
dirt
and
road

deposit
accumulations

away
from

chassis
and

underbody

3
After
correct
toe
in
is

obtained

tighten
side
rod

adjusting
nuts

FA
J
Toe
in

A
B

Toe
in

28
Lines

parallel
to

center
line
of

body

8

F

A696

FA724

Fig
FA
4

Adj
ting
Toe
in

r

II
Li
1
t

Fig
FA

5
Side
Rod
T

Side
lod

edjusting
nl

8

to
10
0

kg

58
to
72
ft

1
Drive

caf
r

whet
ls
ride

01
properly

2

Gauge
sh

steenng
whe

tion

3
Rota

right
an

on
lOner

Tu

corre

i
I

rf

c

Ji
1

A

JI
U

2

7181

JOck

CL

C

SUSPENSION

CROSSMEMBER

REMOVAL

Remove
lower

arm

referring
to

previous
part
of

this
section

2

With
an

overhead
hoist
and

lifting

cable

support
weighi
of

engine
to

remove

loads
from

mountings

3
Remove

engine
mounting
nuts

Separate
suspension
crossmember

from

engine

4

Remove
bolt

indicated

by
arrow

and

separate
suspension
crossmember

from

car
body
Front
Axle
Front

Suspension

n

FA732

Fig
FA
40

Removing
SUlpemion

Croumember

INSPECTION

Check

suspension
crossmember
for

evidence
of
deformation
or

cracking
if

necessary
replace

FA
12
INSTALLAnON

Install

suspension
crossmember
in

reverse
order
of
removal

noting
the

following

fj
Tightening

torque

Suspension
member

to

boiI

y
fIe

me

3
2
to
4
3

kltm

23
to
31
ft
lb

Engine

mounting
insulator
to

suspension
member

3

2
to
4
3

ka
m

23
to
31

ft
b

Rear
Axle
Rear

Suspension

TROUBLE
DIAGNOSES
AND

CORRECTIONS

When
rear
axle
and

suspension
is

suspected
of

being
noisy
it
is

advis

able
to
make

thorough
test
to
deter

mine
whether
the
noise

originates

in
the

tir
s

roads
rfac
exhaust
propeller
shaft

engine
transmission

universal

joint
wheel

bearings
or

suspension

Noise
which

originates
in

other

places
cannot
be
corrected

by

adjust

Condition

Noise
unusual
sound

Instability
in

driving

This

problem
is

also

related
to
the
front

suspension
For

trouble

diagnosis
also
refer
to

the
FA
section

Oil

leakage
Probable
cause

Loose
wheel

nuts

One
or
more

securing
bolts
loose

Lack

oflubricating
oil

or

grease

Faulty
shock
absorber

Incorrect

adjustment
of
rear
axle
shaft
end

play

Damaged
or
worn
wheel

bearing

Worn

spline
portion
of
rear
axle

shaft

Breakage
of
leaf

spring

ose

journal
connections
etc

Unbalance
of
wheel
and
tire

Damage
of
the
rubber

parts
such
as
link

bU
hing

shock
absorber
moun

ting
bush

ing

Faulty
universal

joints

Breakage
of
coil

spring

Loose
wheel
nuts

Damaged
rear
link
rubber

bushings

Worn
shock
absorber

Incorrect
wheel

alignment

Spring
wear

Damaged
oil
seal
on
rear
axle
shaft

Oil

leakage
from

the
differential
carrier

Damaged

grease
seal
of
rear
axle
shaft

RA
l0
ment

or
replacement
of

parts
in

the

rear
axle

and
rear

suspension

In
case
of
oil
leak
first

check
if

there
is

any
damage
or
restriction
in

breather

Corrective
action

Tighten

Tighten
to

specified
torque

Lubricate

as

required

Replace

Adjust

Replace

Replace
if

necessary

Replace

Tighten
to

torque

Balance

Replace
damaged

parts

Adjust
or

replace

Replace

Tighten
to

specified
torque

Replace

Replace

Adjust

Replace

Replace

Replace
parts
as

required

Replace

BRAKE

BOOSTE
R

INSPECTION
OF

OPERATION

Checking
vecuum

pressure

I

Connect
a

vacuum

gauge
in
the

tine
between
check
velve

and
brake

booster

1
Check
valVe

2

Vacuum
gauge

BA942

Fig
BR
26
Air

Tighte
Te
Set

Up

Probable
cause

Air

leakage
at

check
valve

2
Air

leakage
at

push
rod

seal

3
Air

leakage
between
valve

body
and

seal

4
Air

leakage
at
valve

plunger
seat

5

Damaged
piping
or

joints

Air

tight
test
Under
loed

Fifteen

seconds
after

engine
is

stopped
and

brake

fully

applied
ob

serve
the
rate

of

drop
in
air

pressure

registered
by
vacuum

gauge
If

vacuum

Probable
cause

Air

leakage
at
check
valve

2

Damaged
diaphragm

3
Reaction

disc

dropped
off

4

Air

leakage
at

poppet
assembly
seat

and
valve

body

Inspec
tinK
chec
k
valve

Remove

clip
and
disconnect
hoses
Brake

System

2
Start

engine
end
merease

engine

speed
Stop

engine
when

vacuum

gauge
indicates
500

mmHg
l9
69

inHg

Air

tiKht
test

No
load

Fifteen
seconds
after

engine
is

stopped
observe
the
rate

of

drop
in
air

pressure
registered
by
vacuum

gauge

If
vacuum

pressure
drop
below
the

specified
value
refer
to

the

following

chart
to
determine
the

cause
of

failure

Maximum
vacuum

leakage

25

mmHg
0
98

inHgl

Corrective
action

Replace
check
valve

Replace
brake
booster
as
an

assembly

Repair
or

replace

pressure
drops
below
the

specified

value
refer
to
the

following
chart

to
determine
the
cause
of
failure

Maximum

vacuum

leakage

25
mmHg
0
98

inHgl

Corrective
action

Replace
check
valve

Replace
brake
booster
as
an

assembly

at
connections
The
check
valve
can

now
be
removed

BR
12
JQeL

i
l
f

BR119A

Fis
BR
27
Location

of
Check
Valllt

2

Using
a
brake

booster
testel

apply
a
vacuum

pressure
of
500

mmHg

19
69

inHg
to
the

port
of
check

valve
on
the
brake
booster
side
If

vacuum

pressure
drops
below
the

specified
value
in
15

seconds

replace

check
valve
with
a
new
one

Maximum

vacuum

leakage

01
eheck
valn

10

mmHg
0
39

inHgl

3
When

pressure
is

applied
to
the

b

rake
booster
side
of
check
valve
and

valve
does
not

open
replace
check

valve
with
a

new
one

I

0

tLLiJ

Manifold
side
Brake
booster
side

1

Spring

2

Valve
BR963

Fig
BR
28

Check
Value

4
When

installing
check

valve
be

careful
to
avoid

incorrect
connectiolU

See

Fig
DR
28

Operetlns
test

1
Connect

an
oil

pressure
gauge
to

brake

ine
at
connection

on
master

cylinder

2
Install

a

pedal
force

gauge
on

brake

pedal

3
Start

engine
end

increase

engine

speed
until
a
vacuum

pressure
of

500

mmHg

19
69

inHg
is

registered
on

vacuum

pressure
gauge
With

a

steady

vacuum

pressure
of
500

mmHg
19
69

inHg
measure
oil

pressure
with
res

pect
to
each

pedal

operating
force

Brake

System

INSPECTION

AND
ADJ
USTMENT

BRAKE
PEDAL

Free

height
h
mm
in
143
to

149

5

63
to
5

87

Free

play
at

pedal
pad
a
mm
in
I
to
5

0
04
to

0
20

Full
stroke

at

pedal
pad
s

With
brake
booster
mm
in
140
5
51

Depressed
height
d

mm
in

more
than

70
2
76

HAND
BRAKE

Pulling
force

Stroke
kg
lb

mm
in

Number

of
notches

MASTER

CYLINDER

Allowable
clearance
between

cylinder
and

piston

mm
in

BRAKE

BOOSTER

Maximum
vacuum

leakage
15

seconds
after

engine
is

stopped

mmHg
inHg

mm
in

mm
in
Push
rod

length
A

Operating
rod

length
8

I

c

tY

1I1

fF

I

BA290
d

IF

CHECK

VALVE

Maximum
vacuum

leakage
15

seconds
after
500

mmHg

19
69

inHg
pressure
is

applied
mmHg
inHg

BR

17
h

d
1

II

II

d
h

Free

play

V
Free

height

Depressed
height
aR002A

Full
stroke

20
44

93

to
106

3
66

to
4
17

7

to
8

less
than
0
15
0

0059

25

0
98

975
to
10
00
0
3839
to

0
3937

135
5
31

1

B

BR947

10

0
39

Engine
Control
Fuel
Exhaust

SYlltems

ENGINE
CONTROL
SYSTEM

ACCELERATOR
CONTROL
SYSTEM

@

s

1

Acce
i
ator

pedal

2
Accelerator

pedal
arm

3

Stopper
bolt

4

Stopper
lock
nut

S

Kickdown
switch
striker

Automatic
transmission

models

only

6
Accelerator
wire
outer
case

1
Accelerator
wire
socket

8
Accelerator

inner
wire

9

Accelerator

pedal
bracket

and
return

spring

10
Kickdown
switch

11
Accelerator

pedal
stopper
rubber

12
Accelerator

pedal
stopper
bracket

H

109
mm
4
29
in

REMOVAL
AND

INSTALLATION

Accelerator
wI
e

I
Disconnect
accelerator
wire
from

carburetor

2
Remove

snap
pin
from

tip
of

pedal
arm
then
disconnect
wire

from

accelerator

pedal
arm

3
Remove

accelerator

pedal

stopper

bracket
from
dash

panel
and

pull
into

driver

compartment

4

To
install
reverse
order
of
Ie

moval

Accelerator

pedal
a

embly

I

Disconnect
accelerator
wire
at

tip

of
accelerator

pedal
arm

2

Remove
screws

securing
accel

erator

pedal
bracket

to

body

3

Remove
accelerator

pedal
from

dash

panel

4

To
install

reverse
order
of
re

moval
I
IJ

1

II

I

V

J

v

I

@

INSPECTION

I
Check

accelerator

pedal
return

spring
for
rust

fatigue
or

damage

Replace
if

necessary

2

Check

accelerator
wire

cases

socket
and

fastening
locations
for
rust

damage
or
looseness

Repair
or

replace

if

necessary

ADJUSTMENT

Accelerator
IInka
e

I
Connect
accelerator
wire
to
car

buretor
and
accelerator

pedal
arm

2

Adjust
dilnension
H
with

stop

per
bolt

as
shown
in

Fig
FE
I

Dimension
H

109mm
4
29
in

FE
2
F
E558

Fig
FE
I

Accelerator
Control

System

Note
After

adjustment
securely

tighten

stopper
bolt
lock
nut

3
Pull

outer
case
to
uP
direction

making
sure
that

throttle
lever
is
re

turned
to

idle

position
Move
back

outer
case
I

mm
0
04
in
from

a

position
where
throttle

lever
starts

moving
and
fasten

outer
case

securely

with

clamp

Q4t

1

Clamp

2
Outer
case

FE1
1

Fig
FE
2

Adju

ting
Accolerator

Linkage