1991 ACURA NSX light

Steering Wheel

Removal

7. Disconnect the connectors from the horn and cruise

control set/resume switches, then remove the cable

reel connector from its clips.

CRUISE CONTROL

SET/RESUME SWITCHES

4P CONNECTOR

HORN

CONNECTOR

CABLE

REEL

CONNECTOR
8. Remove the steering wheel nut.

9. Remove the steering wheel by rocking it slightly

from side-to-side as you pull steadily with both

hands.

STEERING WHEEL

NUT

Replace.ProCarManuals.com

Steering Wheel

Installation

5. Install the airbag assembly with new Torx bolts.

TORX BOLT

10 N-m (1.0 kg-m, 7 Ib-ft)

Replace.

TORX BOLTS

10 N-m (1.0 kg-m, 7 Ib-ft)

Replace.
AIRBAG ASSEMBLY

6. Disconnect the short connector from the airbag 3P

connector.

7. Connect the airbag 3P connector and cable reel 3P

connector.

8. Attach the short connector to the access panel, then

install the access panel on the steering wheel lower

cover.

ACCESS PANEL

SHORT CONNECTOR

(RED)
9. Connect the battery positive terminal, and then con-

nect the negative terminal.

10. After installing the airbag assembly, confirm proper

system operation:

• Turn the ignition to II: the instrument panel SRS

indicator light should come on for about six sec-

onds and then go off.

• Confirm operation of horn buttons.

• Confirm operation of cruise control set/resume

switch.

• Turn the steering wheel counterclockwise and

make sure the yellow gear tooth still lines up

with the alignment mark.

YELLOW GEAR TOOTH

ALIGNMENT MARKProCarManuals.com

Steering Colum n
Installatio n
12. Instal l th e dashboar d brac e an d dashboar d lowe r
pad.
13. Connec t th e foo t wel l ligh t harnes s an d light-o n
warnin g chim e t o th e dashboar d lowe r panel , the n
instal l th e dashboar d lowe r panel .
DASHBOAR D BRAC E
DASHBOAR D LOWE RPAD
DASHBOAR DLOWER PANE L
14. Instal l th e steerin g whee l an d airba g assembl y t o
th e colum n (se e pag e 17-45 ).
ProCarManuals.com

NOTE: Before removing the gearbox, place a stand jack

under the gearbox and front crossbeam to lightly sup-

port them. Lower the gearbox together with the front

crossbeam.

18. Remove the flange bolts and nuts of the gearbox

and front crossbeam.

10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to Front crossbeam)
FLANGE NUTS

60 N-m (6.0 kg-m, 43 Ib-ft)

10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to front crossbeam)

/

FLANGE NUT

60 N-m

(6.0 kg-m,

43 Ib-ft)

LEFT SIDE:
10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to Front crossbeam)
FLANGE NUT

60 N-m

(6.0 kg-m, 43 Ib-ft)

10 x 97 mm

FLANGE BOLT

60 N-m

(6.0 kg-m, 43 Ib-ft)

(Gearbox to front

crossbeam)

10 x 68 mm

FLANGE BOLT

60N.m

(6.0 kg-m. 43 Ib-ft)

(Front crossbeam to

crossbeam bracket)

RIGHT SIDE:

10 x 84 mm

FLANGE BOLT

60 N-m

(6.0 kg-m, 43 Ib-ft)

(Gearbox to front

crossbeam)

Corrosion resistant bolt/nut
10 x 68 mm

FLANGE BOLT

60N.m

(6.0 kg-m, 43 Ib-ft)

(Front crossbeam

to crossbeam bracket)
19. Lower the gearbox and front crossbeam with care

so as not to interfere with the radiator pipe.

NOTE: The crossbeam is attached to the crossbeam

bracket with knock pins. Remove the crossbeam by

lightly taping on it with a plastic hammer, then

remove the gearbox.

LEFT CROSSBEAM BRACKET

RIGHT CROSSBEAM

BRACKET

STEERING

GEARBOX

BRACKET

CUSHION B

MOUNT BASE

FRONT CROSSBEAM
GEARBOX

ASSEMBLY

20. When installing the crossbeam to the crossbeam

bracket, be sure to align the holes in the crossbeam

with the knock pins on the crossbeam bracket.

CROSSBEAM

BRACKET

FRONT CROSSBEAM
KNOCK PINProCarManuals.com

Steering Gearbo x
Inspectio n
7. Instal l th e boot s o n th e rac k en d wit h th e tub e clamps .
NOTE:
• Coa t th e rac k en d an d insid e o f th e boo t wit h th e
grease .
• Befor e installin g th e boot , b e sur e tha t th e pres -
sur e insid e o f th e boo t i s th e atmospheri c pres -
sure.
• Instal l th e boo t ban d wit h th e rac k i n th e straigh t
ahea d conditio n (righ t an d lef t tie-rod s ar e equa l
i n length) .
BOOT
TUBE CLAM P
STEERIN G GREAS E(Honda P/ N 08733-B070E )Coat th e insid e o f th e boot .
SILICON E GREAS ECoat th e slidin g surfac eof th e rac k end .
8. Instal l th e ne w boo t band s o n th e boot , an d ben d
bot h set s o f lockin g tabs . Lightl y ta p o n th e double d
portion s t o reduc e thei r height .
NOTE : Afte r assembling , slid e th e rac k righ t an d
lef t t o b e certai n tha t th e boot s ar e no t deforme d o r
twisted .
LOCKIN G TAB S
BOOT BAN DReplace .
9. I f th e tie-ro d end s wer e removed , instal l th e tie-rod s
o n th e righ t an d lef t rac k end s an d scre w the m in
unti l th e threade d sectio n is 1 1 m m (0. 4 in ) i n length .
11 m m (0. 4 in)
LOCKNU THand tighten .
TIE-RO D EN D
10. Instal l th e gearbo x an d th e fron t crossbea m in th e
revers e orde r remova l (se e pag e 17-57 ).
11 . Chec k th e whee l alignmen t an d adjus t i f necessar y
(se e sectio n 18 ).
ProCarManuals.com

System Description

Suspension Composition

Outline

Double wishbone independent suspension has been selected for each of the four wheels. This eliminates damper friction

along the steering axis, and permits suspension geometry that takes full advantage of the performance potential of the

wide, low aspect ratio tires. The double wishbone design also allows the use of aerodynamically-efficient and

aesthetically pleasing low fender lines.

The knuckles and the suspension arms are manufactured from lightweight, high-strength aluminum alloys. This gives a

notable reduction in unsprung weight which results in increased traction and improved ride. It also allows the individual

suspension components to be designed in detail for maximum strength and rigidity.

FRONT

UPPER

CONTROL

ARM
KNUCKLE

STABILIZER
REAR

UPPER

CONTROL

ARM
STABILIZER

KNUCKLE

LOWER CONTROL ARM

LOWER CONTROL ARM

To further increase suspension link rigidity, and to obtain optimum knuckle geometry, the knuckles and ball joints are

contained within the wheel profile. At each corner of the car, the individual suspension system is attached to the alumi-

num stressed skin chassis by a cast aluminum sub-frame. This design further reduces overall weight, and ensures that

suspension loads are fed into the chassis at the most efficient points, and in the most efficient directions.

A large front caster angle combined with small trail distance improves straight-line stability and response without caus-

ing heavy steering effort.

FRONT
REAR

SUB-FRAME

SUB-FRAMEProCarManuals.com

(Front Compliance Mechanism)

To avoid the usual compromise between ride quality and handling characteristics, a pivot-type "compliance mechanism"

has been designed as an integral part of the front suspension. When one of the front wheels is subjected to a rearward

movement by an uneven road surface or by heavy braking, the load produced has two separate effects. As with any

suspension system, the load acts in the vertical direction to compress the suspension spring and reduce the ride height.

On the NSX/NSX-T the load also acts through both the upper and lower control arms to twist the compliance pivot. This

allows the wheel to move rearward by a controlled amount, thus absorbing energy. The result is an outstanding ride

quality with only minimal changes to track width and wheel geometry. In cornering, the compliance pivot does not come

into play, and the lateral suspension stiffness required for maximum roadholding and optimum control response is main-

tained.

COMPLIANCE

PIVOT

TOP VIEW

(Rear Toe Control Arm)

Many conventional passenger-car independent rear suspension systems are subject to undesirable changes in toe-in

angle with wheel movement. This results in instability both in cornering and in acceleration. In the NSX/NSX-T, the de-

sign and pivot locations of the rear toe control arm produce a slight controlled increase in toe-in during bump travel. As

a result, the NSX/NSX-T is extremely stable under heavy cornering loads and over bumpy road surfaces.

TOP VIEW

TOE CONTROL ARM
COMPLIANCE

PIVOTProCarManuals.com

Front Suspensio n
Hub Replacemen t
1. Loose n th e whee l nut s slightly .
2. Rais e th e fron t o f car , an d suppor t i t o n safet y stand s
in prope r location s (se e sectio n 1 ).
3 . Remov e th e whee l nut s an d wheel .
NOTE: Befor e installin g th e wheel , clea n th e
matin g surface s o f th e brak e dis c an d insid e o f th e
wheel .
WHEE L NU T110 N- m(11 kg-m , 8 0 Ib-ft )
4. Remov e th e brak e hos e mountin g bolts .
FRON T BRAK E HOS E
BRAK E HOS E MOUNTIN G BOLT S
2 2 N- m (2. 2 kg-m , 1 6 Ib-ft )
Corrosio n resistan t bolt/nu t
5. Remov e th e whee l senso r fro m th e knuckl e an d
fron t lowe r contro l arm .
NOTE :
• D o no t disconnec t th e whee l sensor .
• B e carefu l whe n installin g th e sensor s t o avoi d
twistin g wires .
WHEE L
SENSO R
Corrosio n resistan t bolt/nu t
22 N- m(2.2 kg-m , 1 6 Ib-ft )
6. Remov e th e calipe r bracke t mountin g bolts , an d
han g th e calipe r assembl y t o on e side .
CAUTION : T o preven t accidenta l damag e t o th e
calipe r assembl y o r brak e hose , us e a shor t piec e o f
wir e t o han g th e calipe r assembl y fro m th e
undercarriage .
CALIPER BRACKE T MOUNTIN G BOLT S
11 0 N- m (1 1 kg-m , 8 0 Ib-ft )
10 N- m(1.0 kg-m , 7 Ib-ft )
Corrosio n resistan t bolt/nu t
ProCarManuals.com