ABS NISSAN 300ZX 1984 Z31 Front Suspension Workshop Manual

FRONT AXLE &
FRONT SUSPENSION
SECTION FA
CONTENTS
FRONT AXLE AND FRONT SUSPENSION .. . ..
FRONT AXLE - Wheel Hub . . . . ..
FRONT SUSPENSION . . . .. .
FRONT SUSPENSION -Spring and Strut Assembly
TENSION ROD AND STABILIZER BAR
TRANSVERSE LINK AND LOWER BALL JOINT
. .
SUSPENSION CROSSMEMBER .. .
ADJUSTABLE SHOCK ABSORBER .. . . .. .
SERVICE DATA AND SPECIFICATIONS (S D S )
SPECIAL SERVICE TOOLS . .
.
..
. FA- 2
FA- 3
FA- 6
FA- 7
FA-1 1
. FA-12
FA-14
. . . FA-15
. . FA-22
. FA-24
RL

FRONT SUSPENSION - Spring and Strut Assembly
I nspl
Wash all parts, except for nonmetallic parts,
clean with suitable solvent and dry with com-
pressed air.
a Blow dirt and dust off of nonmetallic parts
using compressed air
a. Oil oozing out around gland packing does not
call for strut replacement.
If oil leakage
is evident on spring seat, check
piston rod and gland packing to correct
the
cause of problem.
If oil leakage occurs on welded portion of
outer strut
casing, replace strut assembly.
b. If shock absorber itself is malfunctioning,
replace
as shock absorber kit (including piston
rod, cylinder, bottom
valve and guide bushing).
INNER CYLINDER AND OUTER CASING
a Inspect inner cylinder and outer casing for
cracks, deformation or other damage. For inner
cylinder damage, replace shock absorber. For
outer casing damage, replace strut assembly
Inner diameter:
Inner cylinder
32 0.32 1 mm (1.260 - 1 264 in)
n
SFA136
Maximum runout.
Inner cylinder
Less than 0.2 mm (0.008 in)
LCylinder
SFA137
PISTON ROD
a Inspect piston rod for cracks, deformation or
other damage Replace shock absorber, if
necessary Inspect threads for cracks or other damage
Replace shock absorber, if necessary.
Rod diameter:
Maximum runout
a
21.78 - 21.94 mm (0.8575 - 0.8638 in)
Less than 0.1 mm (0.004 in)
To'ai gauge R

SFA137 Piston rod
STRUT MOUNTING INSULATOR
Replace if cemented rubber-to-metal portion are
melted or cracked. Rubber parts should also be
replaced, if deteriorated.
STRUT MOUNTING BEARING
Replace if inspection reveals abnormal noise or
excessive rattle in axial direction
FA-8

ADJUSTABLE SHOCK ABSORBER
rStwt assembly
31 -42 (3 2 -4.3,23- 31)
(Without Tool1
P~rton rod lock nut
69 .88 (7 .9.51 .651
Strut mounting tnsulator
Strut mounting bearing m
31 -42 (3 2 -4.3.23- 31)
Strut mounting tnsulator
im
Shock
absorber
Oust seal
Upper seat
Bound bumper
I e- Dust cover
ie
N m Ikg m ft Ibl
SA589
Removal ar
CAUTION:
Keep water and dust away from connector.
Disconnect connector grlpplng
on both sides of
sub-harness connector.
Installation
Remove tenslon rod nuts and knuckle arm
fixing bolts.
SFA570
Make sure brake hose IS secure and not twisted.
FA-I 5

ADJUSTABLE SHOCK ABSORBER
-Removal and Installation (Cont'dL
0 Connect sub-harness to connector within
piston rod using guide
Be careful not to
damage connector.
SRA469
Disassembly
Avoid dirt and dust getting inside strut
0 Remove coil spring Refer to Front Suspension
0 Remove gland packing Refer to Front Suspen-
(Spring and Strut Assembly)
sion (Spring and Strut Assembly)
Inspection
Refer to Front Suspension (Spring and Strut
Assembly)
0 Carefully insert the shock absorber cartridge
into the outer strut tube.
CAUTION:
Do not drop the shock absorber or otherwise
mishandle
it.
SFA165
After the shock absorber has been inserted
into the outer tube, gently shake the strut
assembly right and left
so that the shock
absorber
is centered.
Install gland packing and tighten the gland
packing with the Gland Packing Wrench and
a torque wrench
Refer to Spring and Strut Assembly for assembly
Be careful not to damage the piston rod during
tightening.
ST35652000- I-) SFA591
Further steps are the same procedure as the
conventional strut assembly Refer to Spring
and Strut Assembly for assembly
FA-I 6

ADJUSTABLE SHOCK ABSORBER
Harness Description
Sub-harness
Rear shock absorber
SFA590
Electrical Circuit
SCHEMATIC
I I l,* I"" I
SOFT NORMAL 0 V
SOFT 7 5 V FIRM NORMAL 0 V
I 111-4 IOV I
SFAS82
FA-I 7

ADJUSTABLE SHOCK ABSORBER
Trouble Diagnoses
Possible cause
D Lamp burnt out
B Fuse blown
B Harness wire broken
Checking procedure
(1 I Operate switch and
check lamp for lighting
condition
(2) Check fuse
(31 Check power and
grounding harnesses for
broken wires ~~~~~~
Switch
side harness
shorted
Switch out of order
D Switch side harness
B Switch out of order
B Controller out of
shorted
order
Operate switch and check
lamp for proper lighting con-
dition
Operate switch, check lamp
for proper lighting condition
D Harness wire broken
(Selected signal
wire broken)
Operate switch while lamp is
going on and off
Do this with key on.
Corrective action
I Checking method 'henomenoi
on switch
3 lamps
all off
2 lamps off
Result
One lamp on
Replace burnt out
lamp
3 lamps all off (1) Replace fuse
(2) Replace 3 lamps
(3) Repair harness ~~
Repair
harness One lamp on
2 lamps always on (1) Replace switch
(2) Replace harness
(1 I Replace harness
(2) Replace switch
(31 Replace controller
3 lamps
311 on
One lamp off
3 lamps on
One lamp 01
and 2 lamps
on and
off
Selected On
Other On and
Off Repair harness
B Motor harness
wire broken, or
shorted
(1) Connect dummy actua-
tors (motors) in 4 places,
and operate switches (for
F, N, S),check lampsfor
proper lighting condition
(2) Check dummy actuators
for normal operation in
4 places (Front-Right,
Front-Left, Rear-Right,
Rear-Left)
Selected On
2otherr
. On
and off
Repair harness
Any dummy
actuator not
operating ~ ~~
Connect
dummy actuators in
4 places, and operate switches
(for F,
N. S), check lamps for
proper lighting condition
Further, check
4 places for
any actuator operating longer
than
4 seconds
Selected ._ On
2 others . On
and off
Repair harness D Position switch
harness wire
broken or shorted
Any place where
any actuator
is
Dperating more
than the specified
time after lamp
starts to go on
and off
FA-I 9

ADJUSTABLE SHOCK ABSORBER
Trouble Diagnoses (Cont'd)
'henomenoi on switch
One lamp o
2 lamps on
rnd off
[continued)
Possible cause ~
Wire
broken or
shorted in motor
harness of shock
absorber
b Wire broken or
shorted in position
switch harness of
shock absorber
1 Motor completely
locked
1 Motor overloaded
(Temporary overload
Controller out of
order
Checking method
Checking procedure
(1 I Changing the connection
combinations
of the 3
dummy actuators, check
4 shock absorbers one by
one using the operation
described
in (2) below
(2) Turn switch to F, N, S
and check lamp for
proper lighting condition
Same as above
Same as above
(1) Turn key off to stop
the lamp from going
on
and off, then turn key
on again and check lamp
for proper lighting
condition
12) Check power voltage
:3)-1 Changing the connectior
combinations of the
4 actuators, check each
of the
4 shock absorbers
in one place described
in 131-2 below
13j-2 Turn switch to F, N, S,
and check lamp for
proper lighting condi-
tion.
Replace with normal control-
er, and operate switch, check
amp for proper lighting con-
jition
Result
Selected On
2others On
and
off
(When connected
to shock absorber
out of order)
Same as above
Same as above
Selected . On
2others
Off
Below 9 V
Selected On
2others On
and off
(when connected
to overloaded
shock absorber1
jelected On
Zothers
. On
3nd off
I Returned to
iormal state)
Corrective action
Replace shock
absorber
Same as above
Same as above
Normal
If it is frequent,
take action as
described in (3) below
Repair power system
(Charge battery)
Replace shock
absorber
Replace controller
FA-20

ADJUSTABLE SHOCK ABSORBER
Trouble Diagnoses (Cont'd)
'henomenon on switch
3 lamps on
and
off
Possible cause
Switch malfunction
Switch contact
out of order
Harness disconnected
Cherking method
Checking procedure
Turn key off to stop the lamp
from going on and off, then
turn key on again and check
lamp for proper lighting con-
dition
(1) Operate switch, check
lamp for proper lighting
condition
(2) Turn switch to original
position, and check lamp
for occurrence of on and
off condition
Turn key off to stop the lamp
from going on and off,
then turn key on again and
check lamp for propc-
lighting condition
Result
Selected On
2others
. Off
Selected - On
2 others .. Off
3lamps .On
and off
3 lamps On
and off
Corrective action
Replace switch
ReDlace switch
ReDair harness
FA-21