Operating Pressure Of Boost Controlled Deceleration Device Adjustment; Checking B.c.d.d. Circuit With Function Test Connector; Manual Transmission Models; Automatic Transmission Models - Datsun 620 Series 1977 Service Manual

OPERATI NG
PRESSURE OF
BOOST CONTROLLED
DECELERATION
DEVICE B C D D
ADJUSTMENT
CHECKING a C D D CIRCUIT
WITH
FUNCTION TEST
CONNECTOR
Manual transmission
models
I
Check for continuity
between
@
and@
at
a
speed of
zero
km
Refer
to
Figure
ET 30
B C D D circuit is
functioning
properly
if
continuity
exists
and volt
meter
reading
is 0 volt d
c
in
step
2
below
If continuity does not exist check
for disconnected
connector
and
or
faulty
amplifier speed
detecting
switch
or
B C
D D solenoid valve
2 Check for
presence
of
voltage
across
@ and
@
at
a
speed
of
more
than 16 km
h
10 MPH Refer
to
Figure ET 31
Conduct this
test
by
one
of the
following two
methods
i
Raising
up
rear
axle
housing
with
stand
2 Chassis
dynamometer
test
If voltmeter
reading is
0 volt
at
a
speed
of
more
than
16
km
h 10
MPH
circuit is
functioning
prop
erly
If voltmeter
reading
is not 0 volt
check for disconnected
connector
burned
fuse
faulty
amplifier
B
C D D
solenoid valve
or
speed
detecting switch
3
If by above checks faulty
part
or
unit is
located it should be removed
and tested again If necessary replace
Automatic transmission
models
I With inhibitor switch ON
UN
or
P position check for
presence
of
voltage
across
@ and @
Refer
to
Figure ET 30
If voltmeter
reading is 12 volts
d c
B C D D
circuit
is
func
tioning properly
Engine
Tune up
If voltmeter reading is
zero
check
for disconnected connector
faulty
solenoid valve
or
inhibitor switch
erly
If ohmmeter
reading
is 32 ohms
or
above check for poor
connection
of connector
faulty
B
C
D D
sole
noid valve
or
inhibitor
relay
3
If by above checks faulty
part
or
unit is
located
it
should be
removed
and tested
again
If
necessary
replace
2
With
inhibitor
switch OFF
41
2 D
or
R
position
check for
resistance between @ and
@
Refer to
Figure
ET 31
If ohmmeter
reading
is
25 ohms
or
below circuit is
functioning
prop
l
E
r
1
Ignition key
2
Fuse
3 Amplifier
4 Speed detecting
switch
Above 10
mph
OFF
Below
10 mph
ON
5
Function
test connector
6
B C D D
solenoid
valve
EF711
Fig
ET 30 B C D D circuit with
function
tedconnectoT
Manual transmission modela
@
1
Ignition key
2 Inhibitor switch
N P positions ON
I 2 D R positions OFF
3 D C
D D
solenoid
valve
4
Function
test connector
5 Inhibitor
relay
EF712
Fig
ET 31
Checking
B C D D circuit with
function
tf st
connf
ctor
Automatic transmiMion modtla
ET 17