1977 DATSUN PICK-UP ECU

854
co
in
in
one
minute
or
less

If
no

gasoline
or

only
a

little
flows

from

open
end
of

pipe
with

pump

operated
or
if

pump
does

not
work

perform
the

following
diagnosis

Notes

3
Do
not

connect
battery
in
reverse

polarity
which
if
left
for
a

long

time
would

damage
transitor

circuit
and
disable

pump
Engine
Fuel

b
Do
not
let
fall

pump
as
it

may

damage
electronic

components

c
Do
not

apply
overvoitage
max

l
8Y

Overvoltage
starting

by

quick
charge
or

tage
running

would
deteriorate
or

damage
elec

tronic

components

Fuel

pressure
maximum

0
32

kg
cm
4
6

psi

REMOVAL
AND
INSTALLATION

Flom
fuel
tank

Electric
fuel

pump
is
installed
on

bracket
with
two
bolts
This
bracket
is

located
on
R
H
side
member

adjacent

to
fuel
tank

I
Remove
inlet
hose
from
fuel

pump
Also
remove
outlet
hose
run

ning
to

engine
Receive
fuel

remaining

in
fuel
hose
in
a
suitable
container

2
Disconnect
harness
at

connector

3
Remove
bolts

securing
fuel

pump

to
bracket
and
detach
fuel

pump

4

Installation
is

the
reverse
order
of

removal

9

@

1
Cover

2

Magnet

3
Cover

gasket

4
Filter

5
Gasket

6

Spring
retainer

7
Washer
8
O

ring

9
Inlet
valve

10
Retutn

PIing

11
Plunger

12

Plunger
cylinder

13

Body
To
carburetor

1
Elecuic
fuel

pump

2

Mounting
bracket

3
Fuel
mter

EF72D

Fig
EF
23
Electric
fuel

pump

DISASSEMBLY

Do
not
disassemble
unless

pump
is

faulty

I
Remove

cover
with
wrench
and

take
out
cover
gasket
magnet
and

filter
from

pump
body

2
When

removing
plunger
take
out

spring
retainer
from

plunger
tube

3
Then
take
out
washer
O

ring

inlet
valve
return

spring
and

plunger

from
tube

Note
Do
not
disassemble
electronic

components
If

n

replace

with
new
ones

6

EF721

Fig
EF
24

Exploded
view

of
electric
fuel

pump

EF
12
ASSEMBLY

I

Before

assembly
clean
all

parts

with

gasoline
and

compressed
air

com

pletely

Notes

a
If

gask
t

an
d
fdterare

faulty
r

place

b
Clean

magnet
and
cover
for
fault

c
Take
care
not
to
defonn
thin
tube

d
Assemble

plunger
return

spring

inlet
valve
O

ring
washer
and
set

spring
retainer
in
that
order

e

Assemble
filter

gasket
and
cover

with

f

Tighten
cover
with
wrench
to
the

stopper

If

component
parts
are

dirty
after

disassembly
clean
as
follows

Wash
fIlter
and
strainer
with
clean

gasoline
and
blow
with

compressed

air
When

cleaning
parts
check

fllter
for
fault
If

faulty
replace

Wash

plunger
plunger
cylinder
and

inlet
valve
with
clean

gasoline
and

blow
dust
off

with

compressed
air

2
Check

c
v
m
lI

parts
for
wear

or

damage

If

they
are
found

faulty

replace

them

3

Insert

plunger
assembly
into

plunger
cylinder
of

body
and

apply

electric
current
to
it

Move
the

assembly

up
and
down

If
the

assembly
does
not
move
it

shows

that
the
electric

uuit
is

faulty

and
it
must
be

replaced

9
From
air

pump

l

h
1

Not
actuated

REMOVAL
AND

INSTALLATION

Air
p
mp
sir
cleaner

Remove
air
hose

then
detach
air

cleaner

from

hoodledge
Air
cleaner

element
and
Ii
r
deancr
lower

body
are

built
into
a
unit
construction

Replace

air
cleaner
clcl

nen
and

lower

body
as

an

assembly

J

J

tt
c

t
o

J

EC
323

Fig
EC
26
Replacing
oir
cleaner

element

Air

pum

Remove
air
hoses

from
air

pump

2
Loosen
air

pump
adjusting
bar

mounting
bolts
and
air

pump
mount

ing
bolts
then

remove
air

pump
drive

bell

3
Remove
air

pump
pulley

4
Remove
air

pump
from
bracket

Air
control
valve

California
models

l
Disconnect

air
hoses
and
a
vacu

um
hose
from
air
control
valve

2
Remove
air
con
trol
valve
from

bracket

E
A

R
valve
California
modela

Remove
vacuum

pipe
and
air

hose

and
dismount
E

A
R
valve
Emission
Control

System

o

jJ
To

Intake
mamfold

rF
vacuum

r

To
air

cleaner

From
air

pump

EC781

Fig
EC
27
Locotion

of
E
A
R
wive

Antl
backflravalve

Disconnect
air
hose
and
vacuum

hose
from
anti
backfire
valve

Check
valve

Disconnect
hose
and
remove
check

valve
from
air

gallery
pipe

Air

ganery
pIpe
andinJactlon

nozzles

It
is

very
difficult
to
remove
the
air

gallery
from
the
exhaust
manifold

without

bending
the

pipe
which
could

result
in
fractures
or

leakage
There

fore

removal
of

the
air

gallery
pipe

and

injection
nozzles
should
be
under

taken

only
when

they
are

damaged

I
Lubricate
around
the

connecting

portion
of
air

injection
nozzle
and
air

gallery
with

engine
oil

2
Hold
air

injection
nozzle

hexagon

head
with
a

wrench
and
unfasten
flare

screw

connecting
ait

gallery
to

injec

tion
nozzle
Remove
air

gallery

EC
14
To
intake

manifold

vaCUl
lm

r

Y

4
9
Gf

T

I
To

air
cleaner

I

Actuated

EC299

Fig
EC
25

Operation
of
air
control
value

Notes

a

Apply
engine
011
to
rews
several

times
during
above

work

b
Be
atreful
not
to

damage
other

parts

3
Unfasten
air

injection
nozzle

from

cylinder
head

applying
engine
oil

to
screwed

portion
several
times

4

Check
air

gallery
and
nozzle
for

fractures
or
leakage
Clean
air

injection

nozzle
with
a
wire
brush

5

At
time
of
installation
hold
air

injection
nozzle

hexagon
head
with

a

wrench
and

tighten
air

gallery
flange

screw
to
a

torque
of
5
0
to
5
9

kg
m

36
to
43
ft
lb

6
Check

cylinder
head
air

injection

nozzle
and
air

gallery
for
leaks
with

engine
running

Air

pump
relief
vslve

Loosen
carburetor
air
cleaner

mounting
sc
ews
and

remove
air

pump
relief
valve

InstallatIon

Install
in
the

reverse
order
of
reo

moval

DISASSEMBLY
AND

ASSEMBLY

Disassembly
of
air
pump

1
Remove
four

pulley
drive
bolts

and
remove

pulley
from
hub

2

Secure
air

pump
drive
hub
in

a

vise

as
shewn
in

Figure
EC

28
and

remove
four
end
cover
bolts

Note
Never

clamp
on
the

aluminum

housing

EC302

Fig
EC
28

Removing
cover

3
Remove
end
cover

by
carefully

tapping
around
dowel

pin
with

a

plas

tic
mallet
and
lift

up
straight

4
Put
match
marks
0
on
rotor

ring
and
side
of
rotor
to
ensure
correct

reassembly
and
remove
four
screws

that
retain
rotor

ring
to

rotor

using
a

Hexagonal
Wrench
STl9810000

Notes

a

Generally
match
marks
are
indi

cated
on

both
rotor

ring
and
rotor

by
the
manufacturer

ECll1

Fig
EC
29

Removing
rotor
ring
Emission
Control

System

b
Discard
screws
which
were
re

moved

Always
use
new
ones
when

installing

5

Remove
vane
from
rotor

EC661

Fig
EC

30
Remooing
vanes

6
Remove
four
carbon

shoes
and

two
shoe

springs
from
rotor

using

needle
nose

pliers
or
tweezers

Note
Carbon
shoe
A

0
039
in
wider
than

confuse
them
is
I
mm

B
Do
not

If

replacement
of
front

bearing
is

necessary

proceed
as
follows

7
Remove
air

pump
drive
hub
with

standard

puller

EC
15
8
Remove
four
screws

securing

front

bearing
cover
in

place
and
de

tach

bearing
cover

9

Support
the
rear
end
face
of
air

pump
housing
with
Rotor

Adapter

STl9890000
Drive
rotor
out

by
push

ing
rotor
shaft
with

Bearing
Pressing

Tool
STl9940000

STl9940000

1Ul

STl9890000

I
I

EC303

Fig
EC
32

Removing
rotor

shaft

10

Support
the
front
end
face
of

housing
with

Bearing
Adapter

STl9930000
Attach

Bearing
Driver

STl9910000
to
front

bearing
on
the

inside
of
air

pump
housing
iuid

press

out

ll

I
I

STl9910000

i

L

9930000

J

1

EC304

Fig
EC
33

Remouing
ball

bearing

11

Keep
disassembled

parts
in

rder

Emission
Control

System

Assembl
of
air

pump

I
Front

bearing

Support
the
rear
end
face
of
air

pump
housing
with
RotOL

Adapter

STl9890000
Press
front

bearing
into

place
with
a

press
arid

Bearing
Ptessing

Tool
STl9940000

I
I

STl9940000

X8
03

Fig
EC
35

Pressing
ball

bearing
L

2

Bearing
cover

Torque
four

bearing
cover

securing

bolts
to
0

1
to

0
2

kg
m
0
7

to
1
4

ft
lb

3
Rotor
shaft

Support
the
inward
bottom
of

rotor
with
Rotor
Stand
STl9920000

Press
rotor
into

place
with
a

press

and

Bearing
Drive
STl9910000
until

the

stepped
portion
of
rotor
shaft

touches
front

bearing
inner
race
C
1

ST
19910000

ST19920000

I
EC3Q7

Fig
EC
36

Pressing
rotor
shaft

Notes

a
Be

sure
to
drive
front

bearing
inner

race
in

b
After
rotor
is
installed
in

place

ensure
that
the
rotor
end
is

pos

tioned
below
the
end
face
of
air

pump
housing

Position
of
rotor

end
below
air

pump

housing

0
050

to
0
150
mm

0
0020
to
0
0059
in

4

Air

pump
drive
hub

Support
the
inward
bottom
of

rotor
with
Rotor
Stand
STl9920000

EC
16
EC562

Fig
EC
34

Componenbr
of
two
vane

type

Press
drive
hub
into

place
with
a

pre
and

Bearing
Driver
STI
991
0000

until
the
end

face
of
drive
hub
touches

froE
c
ing
in
n
c

j

STt9910000

STl9920000
e

r

EC308

Fig
EC
37

Pressing
air

pump
drive

hub

5

Carbon
shoe

1
Place
air

pump
drive
hub
in
a

vise

2

Clean
carbon
dust
etc
from

shoe

grooves

3

Align
rotor
with

housing
proper

ly
Refer
to

Figure
EC
38
Then
insert

carbon
shoes
into

place
noting
their

directions

EC540

Fig
EC

38
Install

carbon
shoe

Notes

a

Carbon
shoe
A

is
1
mm
0
039

in

wider
than
B

Do
not
confuse

them

b
If
carbon

shoes
are

exposed
beyond

the
rotor

end
face
remove

carbon

shoes
and
clean
shoe

grooves

Reassemble

carbon
shoes

6

Vane

1
Pack
vane

bearing
with

high

melting
point
grease
MIL
G
3545
A

Esso

ANDOK260
or

equivalent
and

insert

dummy
shaft
into
the

Vane

bearing

STl9900000

EC563

Fig
EC
39
Vane

assembly

2
Install
vane
in

place
on
rotor

using

Dummy
Shaft

STl9900000
as
a

guide

Note
The
vanes

may
require
6
to
16

km
4

to
10

miles
wear
in

running

time
In
the

event
a

slight
squeaking

still

remains
drive
the
car
about
64

to
80
km
h
40
to
50

MPH
In

most

cases
6
to
16

km
4
to

10

miles
will
be
sufficient

for
wear
in

7

Shoe

spring

Place
shoe

springs
in

deeper
groove

of
shoe
Emission
Control

System

i

111

11

EC123

Fig
EC
40

Installing
shoe

spring

Note
When

instaUing
a
shoe

spring

make
sure
that
the
outward
bend

ing
side

faces
in

shoe
and
that
both

ends

of

spring
face
in
the

wall
of

shoe

groove

Be
sure

to

push

spring
in

so
that

spring
end
face
is
flush
with

rotor

8
Rotor

ring

Install

rotor

ring
by
correctly
align

ing
the
rear
end

face
of
rotor

with
the

0
mark

in
rotor

ring
and

tighten

four

screws
to

the

specified

torque

with

Hexagonal
Wrench
ST19810000

Tightening
torque

0
5

to
0
7

kg
m

3
6
to
5
1

ft
lb

5T19810000

EC124

Fig
EC
41

In8talling
rotor

ring

9
Removal
of

dummy
shaft

Carefuny
withdraw

dummy
shaft

from

vane

10

Vane
shaft

Pack

rear

bearing
with

high

melting

point

grease
MIL
G
3545

A

so

ANDOK
260
or

equivalent

Apply
thin

coating
of

grease
to
vane

shaft
and
rotor

ring
and
insert

vane

shaft

into
its

bearing

EC
17
Notes

a

Do
not

apply
an
u
tue
stress

to

vane
shaft
when

inserting

b

If
two
vanes
are
dislocated
when

inserting
vane
shaft

correctly

align

vanes

by
inserting
dummy
shaft

Then
draw
out

dummy
shaft
and

insert
vane

shaft

c
When

wear
occurs
on
vane
shaft

or

when

replacement
of

rear

bearing
is

necessary
replace
rear
cover
as

sembly

Jl
End
cover

Position
end

cover
in

place

Snugly

tighten
the
bolt
close
to

the
dowel

Then

tighten
four
bolts

to
the

speci

fied

torque

Tightening
torque

0

7
to
0

9

kg
m

5

1

t06
5
ft4b

EC302

Fig
EC
42
Insla
ling
end

cover

12

Pulley

Tighten
four

pulley
securing
bolts

to
the

specified
torque

Tightening
torque

0
7
to
0

9

kg
m

5

lt06
5
ft

lb

INSPECTION

Air

InJection
system
hosas

Check
air

system
hoses
for
loose

connections
cracks
or
deterioration

Retighten
or

replace
if

necessary

Air

ystem
manifold

Check
air

gaUery

pipe
and

injection

nozzles
for
loose
connections
and

cracks

Retighten
or

replace
if
neces

sary

Air

pump

I

Operate
engine
until
it
reaches

normal

operating
temperature

2

Inspect
all
hose
hose
connec

tions
and
air

gallery
for
leaks
and

correct
if

necessary
before

checking

air

injection

pump

3
Check
air

injection
pump
belt

tension
and

adjust
to

specifications
if

necessary

4

Disconnect
air
supply
hose
at

check
valve

5

Disconnect
vacuum
hose
from
the

air

control
valve
California

type

only

6
Insert

open
pipe
end
of
Air

Pump

Test

Gauge

Adapter
STl9870000
in

air

supply
hose

Clamp
hose

securely

to

adapter
to

prevent
it
from

blowing

out
Position

adapter
and
test

lli
uge
so

that
air
blast
emitted

through
drilled

pipe
plug
will
be

harmlessly

dissipated

7
Install

a
tachometer

on

engine

With

engine
speed
at
2

600

rpm
ob

serve

pressure
produced
at

test

gauge

Air

pressure
should
be
100

mmHg

3

94

inHg
or
more

8
If
air

pressure
does

not
meet

above

specifications
proceed
as
fol

lows

I

Repeat
2
and
3

above

2
Disconnect
air

supply
hose
at

anti
backfire
valve

Plug
air

hose

open

ing
and

screw
with
a

clamp
Repeat

pressure
test

3
With

engine

speed
at
1

500

rpm

close
hole
of
test

gauge
with

finger
If

a

leaking
sound

is
heard
or

leaking
air

is
felt

by
ftnger
at
relief

valve
relief

valve
is

malfunctioning
Relief
valve

should

be

replaced
or

repaired

4

If
air

injection
pump
does
not

meet
minimum

requirement
of

pres

sure
test
it

should
be

replaced

Control
valve

The

following
procedures
are
reo

commended
for

checking
and
or
as

certaining
that
the
various

components

of
the
exhaust
emission
con
Irol

system

are

operating

properly

The

engine
and
all

components

must

be
at
normal

operating
tempera

tures
when
the

tests
are

performed

Prior

to

performing
any
extensive

diag

nosis

of
the
exhaust
control

system
it
Emission
Control

System

must
be
determined
that

the

engine
as

a
unit
is

functioning
properly

Check
valva

Warm

up
engine
thoroughly

2

Disconnect
hose

leading
to
check

valve
from
air

hose
COJUlector

3

Check
hose

opening
for

any
indi

cation
of
exhaust

gas
leaks
Ifleaks
are

detected

replace
check
valve

4

Race
the

engine

lightly
at
about

2
000

cpm
and
then

return
it
to

idling
VisuaDy
check
the
hose
for

any

indication
of
exhaust

gas
leaks
before

the

engine
returns
to

idling

speed
If

leaks
are
detected

replace
check
valve

EC310

Fig
EC
43

Checking
check
valve

Air

pump
raIle
valve

After

completing
inspection
of
air

pump
check
air

pump
relief
valve
in

the

following
steps

J

Disconnect
hoses

leading
to
check

valve
and
air
control

valve
from
air

hose

connector
and

install
blind

cap

to
the

connector

2
With

engine
running
at

about

3
000

rpm
under
no
load

place
your

hand
on
the
air

outlet
of
air

pump

relief
valve
to
check
for

discharged
air

If
no
air

is
felt

replace
the
air

pump

relief

valve

EC311

Fig
EC
44

Checking
air

pump
relief

valve

EC

18
Air
control
valve

C
U
ornla
models

I
Warm

up
engine
thoroughly

2
Before

checking
air
control

valve

check
all
hoses

for
loose
connection

leaks
etc
and

repair
or

correct
if

necessary

3

With

engine
idling
disconnect
the

outlet
side
hose
of

the
air
control

valve
and

place

your
hand
on
the
air

hose
outlet
to
check
for
air
If
no
air
is

felt

replace
the
air

control
valve

4

Pull
vacuum
hose
off
from
air

con
trol
valve
If

discharge
of
air
from

air
hose

stops
the
air
con
trol
valve

is

normaL
If

discharge
is
still
felt

replace

the
valve

Plug
up
the

removed

vacuum
hose

to

stabilize

engine
running

EC312

Fig
EC
45

Checking
air
control
valve

Emarsancy
air
rella
valve

E
A
R
Valve

lCalHornla
models

L
Warm

up
engine
thoroughly

2

Before

checking
air

control
valve

check
all
hoses
for
loose
connection

leaks
etc
and

repair
or
correct
if

necessary

3
Race

engine
approximately

2
000

rpm
under
no
load
Place

your

hand
on
air

outlet
of
E

A
R
valve
to

check
for

presence
of

discharged
air
If

no
air

is
felt

E
A

R
valve
is
normal

4

Disconnect
vacuum
hose
from

B
A

R
valve
as
shown
in

Figure
EC

46

4
E
G
R

warning
system

EC251

Detector
drive
counter

Detecfor
drive
counter
is
secured

on
the

top
of
R
H

hoodledge
panel
in

engine
room
To

remove
detector
drive

counter
disconnect
w
COJUlector

and

loosen
two
bolts

securing
detector

drive
counter
to
hoodledge

panel

2

E
G
R

warning
lamp

E
G
R

warning
lamp
is
mounted
at

the

top
cen
ter
of
instrument

pad
To

remove
E
G

R

warning
lamp
proceed

as
follows

1
Remove

masking
panel

On
models

equipped
with
radio

remove

warning
lamp
from
under
in

strument

panel

2

E
G
R

warning
lamp
is

a
twist

type

Remove

lamp
and
socket

as
an

assembly
Push
and
twist

lamp
off

can

EC554

Fig
EC
60
Removing
E
G
R

warning

lamp
Emission
Control

System

3
Odometer
switch

Odometer
switch
is
mounted
on
the

back
side
of

speedometer
Cam
in
the

odometer
switch
is
rotated

by
the

speedometer
To

dismount
odometer

switch

proceed
as
follows

I

Dismount
combination
meter
as

sembly

2
Remove
meter
front
cover
and

take
off

clips
and
screws
to

dismount

shadow

plate

3

Loosen
screws

securing
speed

ometer
to

printed
circuit

housing
then

remove

speedometer

4

Remove
two
screws

securing

odomete
switch
to
the

back
side
of

speedometer
and
detach
odometer

switch

EC239

Fig
EC
61

Removing
odometer

switch

InstaUatlon

To
install
reverse
the
removal

pro

cedure

EC24
V

r
CID

1
Detector
drive
counter

2
E
G
R
warning
lamp

3
Speedometer

Fig
EC
59
E
G
R

warning
y
tem

INSPECTION

Checking
E

G
R
control

system
in

its
mounted
conditionS

I

Make
a

thorough
visual
check
of

E

G
R
control

system
If

necessary

wipe
away
oil
to

facilitate

inspection

If

any
hoses
are
cracked
or

broken

replace

2

With

engine
running
check

E

G
R

warning
system
for

proper

function
Make
sure
that
E

G
R
warn

ing
lamp
lights
when

ignition
switch
is

turned

to
START

position
starter

mo

tor
runs
If
E
G
R

wanung
lamp
does

not

light
inspect
harnesses
and

con

nectors
or

replace
warning
lamp
Then

turn

ignition
switch
to
ON

position

and

check
the
following
items

I

If
odometer
of
detector
drive

counter
has
not
reached
50
000

counts
make
sure
that
E
G
R

warning

lamp
does
not
light

2
If
odomete
of
detector
drive

counter
has
attained
50
000
counts

make
sure
that
E
G
R

warning
lamp

lights

If

warning
lamp
does
not

light

check
harnesses
connectors
and
de

tector
drive
counter
replace
warning

lamp
or
detector
drive
counter
if

necessary

Notes

Operation
oC
E
G
R

warning
lamp

is
as
Collows

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