ACURA NSX 1991 Service Repair Manual

Steering Colum n
Remova l
SRS component s ar e locate d i n thi s area . Revie w th e
SR S componen t locations , precautions , an d procedure s
i n th e SR S sectio n 24 befor e performin g repair s o r ser -
vice .
1 . Disconnec t bot h th e negativ e cabl e an d positiv e
cabl e fro m th e battery .
2 . Remov e th e airba g assembl y an d steerin g whee l
fro m th e colum n (se e pag e 17-45 ).
3 . Remov e th e dashboar d lowe r panel , dashboar d
lowe r pad , an d dashboar d brace .
DASHBOAR DBRACE
DASHBOAR D LOWE RPAD
DASHBOAR D
LOWE R PANE L
4. Disconnec t th e connecto r betwee n th e cabl e ree l
an d th e SR S mai n harness , the n remov e th e con -
necto r holder .
5 . Remov e th e colum n lowe r panel .
COLUM NLOWER PANE L
SRS MAI N HARNES S(YELLOW )
CONNECTO R HOLDE R
CABLE REE L3P CONNECTO R(YELLOW)
6. Remov e th e colum n covers .
NOTE : B e carefu l no t t o damag e th e colum n covers .
UPPER COLUM N COVE R
LOWERCOLUM NCOVER
7. Disconnec t th e TC S senso r connector .
TCS SENSO R CONNECTO R
(GREEN )
TC S SENSO R
ProCarManuals.com

Steering Colum n
Remova l
8. Remov e th e combinatio n switc h assembl y fro m th e
colum n shaft .
NOTE : Th e combinatio n switc h ca n b e remove d b y
disconnectin g onl y th e TC S senso r connector .
COMBINATIO N SWITC HASSEMBL Y
COLUMN SHAF T
9. Remov e th e steerin g join t cover .
CLIP
CLAMP S
STEERIN G JOIN T COVE R
10. Remov e th e steerin g join t bolt s an d toothe d loc k
washer s fro m th e steerin g joint .
STEERIN G JOIN T
TOOTHE DLOCK WASHER S
STEERING JOIN T BOLT S
11. Disconnec t th e ignitio n switc h connector s an d
remov e th e colum n holder , the n remov e th e steer -
in g colum n assembl y b y removin g th e 8 m m bolt s
an d flang e nuts .
STEERIN GCOLUMN ASSEMBL Y
COLUMNHOLDER8 m m FLANG E NUT S
8 m m BOLT S
ProCarManuals.com

Inspection
SHIM
STEERIN G COLUM N
ASSEMBL Y 6
m m SOCKE T BOL T
10 N- m(1.0 kg-m , 7 lb-ft ) RETAININ
GCOLLARSCheck fo r damage .
8 m m FLANG E NUT S
16 N- m(1.6 kg-m , 1 2 Ib-ft ) STEERIN
G JOIN T
BOLT S
22 N- m(2.2 kg-m , 1 6 Ib-ft )
CLI P
8 m m BOLT S
22 N- m(2.2 kg-m , 1 6 Ib-ft )
STEERIN GJOINT COVE R
CLAMP S
NOTE:
• Chec k th e telescopi c mechanism , til t mechanism , an d steerin g join t bearing s o r steerin g shaf t fo r movemen t an d damage .
Replac e a s a n assembl y if damage d o r faulty .
• I f eithe r th e steerin g colum n assembl y o r TC S senso r i s removed , selec t th e appropriat e shi m an d adjus t th e distanc e
betwee n th e steerin g shaf t an d TC S sensor . Refe r t o Sectio n 1 9 fo r shi m selection .
Attac h a sprin g scal e to th e kno b o f th e telescopi c lever .
Measur e th e forc e require d t o mov e th e lever .
Preload : 7 0 - 9 0 N (7 - 9 kg , 1 5 - 2 0 Ibs )
SPRIN GSCALE
If th e forc e measure d i s no t withi n th e specification ,
loose n th e locknut , the n tur n th e telescopi c adjustin g
bol t unti l th e correc t forc e ca n b e obtained .
LOCKNUT
TELESCOPI C
ADJUSTIN G BOL T
TELESCOPI C LEVE R
COLUM N HOLDE RTOOTHE
D
LOC K WASHE R
TC
S SENSO R
ProCarManuals.com

Steering Colum n
Installatio n
SRS component s ar e locate d i n thi s area . Revie w th e
SR S componen t locations , precautions , an d procedure s
i n th e SR S sectio n 24 befor e performin g repair s o r ser -
vice .
1 . Sli p th e lowe r en d o f th e steerin g join t ont o th e pin -
io n shaft .
2 . Repositio n th e colum n assembl y o n th e hange r
bracket , an d loosel y tighte n wit h 8 m m flang e nuts .
COLUM N ASSEMBL Y
8 m m FLANG E NUT S16 N- m(1.6 kg-m , 1 2 Ib-ft )
3. Tighte n t o th e steerin g join t bolts .
NOTE :
• B e sur e tha t th e lowe r bol t i s securel y i n th e
groov e in th e steerin g gearbo x pinio n shaft .
• B e sur e th e pinio n shaf t an d th e steerin g colum n
shaf t ar e aligned ; th e join t shoul d sli p o n freely .
I f no t repositio n th e steerin g rac k t o correc t th e
misalignment .
STEERING JOIN T
Sli p th e uppe r en d o f th e steerin g join t ont o th e steerin g
shaf t (lin e u p th e bol t hol e wit h th e groov e aroun d th e
shaft ) an d loosel y instal l th e uppe r bolt .
STEERIN G COLUM NSHAFTPull dow n whil e
tightenin g bolt .
Bol t mus t lin e u p wit h fla t
on shaft .
STEERIN G GEARBO XPINION SHAF T
TOOTHE D LOC KWASHER S
STEERING JOIN T BOLT S22 N- m (2. 2 kg-m , 1 6 Ib-ft )
4. Instal l th e colum n holde r wit h th e 8 m m bolts .
COLUM NHOLDER8 m m BOLT S22 N- m(2.2 kg-m , 1 6 Ib-ft )
5. Tighte n th e 8 m m flang e nut s t o th e specifie d
torque .
6 . Instal l th e steerin g join t cove r wit h th e clamp s an d
clips .
CLIP
CLAMP S
STEERIN G JOIN T COVE R
ProCarManuals.com

7. Install the combination switch assembly over the

column shaft.

COMBINATION SWITCH

ASSEMBLY

COLUMN SHAFT

8. Reconnect TCS sensor connector.

TCS SENSOR CONNECTOR

(GREEN)

TCS SENSOR
9. Install the column covers.

NOTE: Be careful not to damage the column covers.

UPPER COLUMN COVER

LOWER

COLUMN

COVER

10. Insert the cable reel 3P connector through the col-

umn lower panel, and attach it to the column lower

panel with the connector holder. Then connect the

SRS main harness and cable reel 3P connector.

11. Install the column lower panel.

COLUMN

LOWER

PANEL

SRS
MAIN

HARNESS

CONNECTOR

HOLDER

CABLE REEL 3P

CONNECTORProCarManuals.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

Steering Gearbox

Removal/Installation

NOTE: Before removing the steering gearbox, make
sure the front wheels are straight ahead. 1. Remove the steering joint cover.

STEERING JOINT COVER
7. Install the 10 mm hex nut on the balt joint. Be sure
that the 10 mm hex nut is flush with the ball joint
pin end, or the threaded section of the ball joint pin
might be damaged by the ball joint remover.
NOTE: Remove
the
ball
joint
using
the
ball
joint
remover, 28 mm. Refer to page 18-21('93-'96),('91-'92)

for how to use the ball joint remover.
8. Separate the tie-rod ball joint and knuckle using the
special tool.
CAUTION: Avoid damaging the ball joint boot.

NOTE: If necessary, apply penetrating type lubri-

cant to loosen the ball joint.

BALL JOINT REMOVER. 28 mm

07MAC–SL00200

CASTLE NUT

44 N·m (4.4 kg-m, 32 Ib-ft)

10 mm HEX NUT

CLAMP

CLIP
COTTER PIN

Replace.

On reassembly, bend

the cotter pin as shown.

Corrosion resistant bolt/nut

9. Remove the folding spare tire and spare tire holder plate,
10. Disconnect the battery negative terminal, then dis- connect the positive terminal and remove the bat-
tery.

11. Remove the spare tire holder and floor under cover.

FLOOR UNDER

COVER
10 N·m

(1.0kg-m, 7lb-ft)

SPARE TIRE

HOLDER

2, Remove the steering joint bolts, and disconnect the
steering joint by moving the joint toward the col-
umn.
STEERING JOINT

TOOTHED LOCK

WASHERS

STEERING JOINT BOLTS

22 N·m (2.2 kg-m, 16 Ib-ft)

3. Lock the steering shaft with ignition key to keep the steering shaft position.
4. Raise the front of the car, and place safety stands in the proper locations (see section 1).
5. Remove the front wheels.
6. Remove the cotter pin from the castle nut, and remove
the
nut.
8 x
1.25
mm

BOLT

WASHERS

25 N·m

(2.5 kg-m, 18 lb-ft)

Corrosion resistant bolt/nut
(cont'd)ProCarManuals.com

Steering Gearbo x
Removal/Installatio n
12. Disconnec t th e connector s fro m th e EP S wir e har -
ness .
13. Remov e th e groun d cabl e b y removin g th e EP S wir e
harnes s stay .
EPS WIR E
HARNES S STA Y EP
S WIR E HARNES S
GROUN D
CABLEFLANG E BOL T
1 0 N- m (1. 0 kg-m , 7 Ib-ft )
14. Remov e th e termina l guar d an d groun d cable .
15 . Remov e th e termina l nut s an d th e wire s fro m th e
gearbo x terminals .
TERMINAL NUT S10 N- mGROUN D CABL E (1.0 kg-m , 7 Ib-ft )
FLANG E BOL T
1 0 N- m (1. 0 kg-m , 7 Ib-ft )
NOTE : Afte r tight -ening th e termina lnuts, ben d u p th etermina l tab sagains t th e nut ssecurely .
FLANG E BOL T
1 0 N- m (1. 0 kg-m , 7 Ib-ft )
TERMINA L
GUAR D
Corrosio n resistan t bol t
16. Remov e th e radiato r pip e bracke t a t th e fron t com -
partmen t bulkhead .
RADIATOR PIP E BRACKE T
RADIATO R PIP E
17. Remov e th e radiato r pip e bracke t a t th e floor , an d
spac e th e radiato r pip e awa y fro m an d gearbox .
RADIATO R PIP E
RADIATO R PIP E
BRACKE T
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
Removal/Installatio n
21. Instal l th e gearbo x i n th e revers e orde r o f removal .
NOTE: Whe n connectin g th e steerin g joint , mak e
sure tha t th e cabl e ree l o f airba g syste m is centered .
22 . Se t th e steerin g rac k i n th e cente r o f it s stroke .
23 . Cente r th e cabl e ree l a s follows :
Tur n th e steerin g whee l lef t approx . 15 0 degree s t o
chec k th e cabl e ree l positio n wit h indicator .
I f th e cabl e ree l i s centered , th e yello w gea r toot h
line s u p wit h th e alignmen t mar k o n th e cover .
Retur n th e steerin g whee l righ t approx . 15 0 degree s
t o positio n th e steerin g whee l i n th e straigh t ahea d
position .
YELLOW GEA R TOOT H
ALIGNMEN T MAR K
24. Sli p th e lowe r sid e o f th e steerin g join t ont o th e pin -
io n shaf t (lin e u p th e bol t hol e wit h th e groov e
aroun d th e shaft ) an d loosel y instal l th e lowe r bolt .
NOTE :
• B e sur e tha t th e lowe r steerin g join t bol t i s
securel y i n th e groov e i n th e steerin g gearbo x
pinion.
• I f th e steerin g whee l an d rac k ar e no t aligne d
centered , repositio n th e serration s a t lowe r sid e
o f th e steerin g joint .
25 . Adjus t th e fron t to e afte r installin g th e gearbo x (se e
sectio n 18 ).
ProCarManuals.com