1991 ACURA NSX brake

Idle Contro l Syste m
Brake Switc h Signa l
This signal s th e EC M whe n th e brak e peda l i s depressed .
Are th e brak e light s o n withou tdepressin g th e brak e pedal ?Inspec t th e brak e switc h (se e
sectio n 19 ).
Depres s th e brak e pedal .
D o th e brak e light s com e on ?
Is th e fus e OK ?
Chec k fo r a n ope n in th e wire :
1 . Depres s th e brak e pedal .
2 . Measur e voltag e betwee n
EC M connecto r terminal s F1 6
an d A2 6 wit h th e brak e peda l
depressed . —
Repai r shor t i n th e wir e
betwee n th e brak e switc h
an d th e BRAK E LIGH T S W
HOR N (2 0 A ) fuse .
— Replac e th e BRAK E LIGH T
S W HOR N (2 0 A ) fuse .
WIR E SID E O F FEMAL E TERMINAL S
I s ther e batter y voltage ? Repai
r ope n i n th e wir e betwee n
th e EC M (F16 ) an d th e brak e
switch .
Inspectio
n o f Brak e Switc h Signal .
Inspect th e BRAK E LIGH T S W
HORN (20 A ) fus e i n th e under -
hood fuse/rela y box .
Repai r ope n i n th e wir e
betwee n th e brak e switc h
an d th e BRAK E LIGH T S W
HOR N (2 0 A ) fuse .
Inspec t th e brak e switc h (se e
sectio n 19 ).
ECM CONNECTOR S
Brak e switc h signa l i s OK .
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Slave Cylinde r
Remova l
1. Disconnec t th e clutc h hos e fro m th e slav e cylinder .
CAUTION :
• Avoi d spillin g brak e flui d o n th e painte d sur -
faces , a s i t ma y damag e th e finish .
• Plu g th e en d o f th e clutc h hos e wit h a sho p
towe l t o preven t brak e flui d fro m comin g out .
2. Remov e th e slav e cylinde r fro m th e clutc h housing .
SLAVE
CYLINDE R
CLUTCHHOSE
O-RIN G
Replace .
BOO T
Remov e an d chec k fo r sign s o f leakin gand deterioration .
Installation
Super Hig h Tem p Ure a Greas e (P/ N
08798-9002) .
Brake Assembl y Lub e o r equivalen t rubbe r
grease .
1. Instal l th e slav e cylinde r o n th e clutc h housing .
SLAVE CYLINDE R
8 x 1.2 5 mm22 N- m (2. 2 kg-m ,16 Ib-ft )
10 N- m (1. 0 kg-m ,7 Ib-ft )
(P/N 08798-9002 )(Brake Assembl y
Lube )
2. Blee d th e clutc h hydrauli c system :
• Attac h a hos e t o th e bleede r screw , the n suspen d
th e hos e i n a containe r o f brak e fluid .
• Mak e sur e ther e i s a n adequat e suppl y of flui d a t
the maste r cylinder , the n slowl y pum p th e
clutc h peda l unti l n o mor e bubble s appea r a t th e
bleede r hose .
• Refil l th e maste r cylinde r flui d whe n done .
• Us e onl y DO T 3 or 4 brak e fluid .
6 x 1. 0 m m10 N- m (1. 0 kg-m ,7 Ib-ft )
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Slave Cylinder (Canada)

Overhaul/Inspection

Super High Temp
Urea
Grease
(P/N
08798-9002).

Brake Assembly Lube or equivalent rubber grease.

SLAVE CYLINDER SPRING

Install with small end

facing piston.

(Brake Assembly

Lube)
SLAVE CYLINDER BODY

Inspect the cylinder wall for

scoring and wear.

(Brake Assembly

Lube)

BLEEDER SCREW

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

SLAVE CYLINDER PISTON

Inspect for wear and damage.

(P/N 08798-9002)
(Brake Assembly

Lube)
BOOT

Check that it is fitted securely

over cylinder body.

PUSH ROD
PISTON CUP B

Replace.
PISTON CUP A

Replace.ProCarManuals.com

Transmission Assembly

Removal

20. Remove the intermediate shaft heat cover and the intermediate shaft mounting bolts.
21. Pry the intermediate shaft out of the differential. Pull and remove it. NOTE:
• Coat all precision finished surfaces with clean engine oil or grease.
• Tie plastic bags over the driveshaft ends.

Corrosion resistant bolt/nut
INTERMEDIATE SHAFT
SUPPORT BASE
INTERMEDIATE SHAFT INTERMEDIATE SHAFT
HEAT COVER
INTERMEDIATE SHAFT
MOUNTING BOLT
22. Remove the parking brake cable holder and the wheel sensor wire clamp.
23. Remove the bolt, and separate the toe control arm from the side beam (see section 18).
24. Remove the damper fork bolt (see section 18).
25. Remove the bolts, and separate the lower control arm from the side beam. 26. Pry the driveshaft out of the differential. Pull and remove it. NOTE:
• Coat all precision finished surfaces with clean engine oil or grease.
• Tie plastic bags over the driveshaft ends.

Corrosion resistant bolt/nut
DAMPER FORK BOLT SELF-LOCKING NUT

Replace.

TOE CONTROL ARM
WHEEL SENSOR WIRE CLAMP PARKING BRAKE
CABLE HOLDER
FLANGE BOLT
LOWER CONTROL ARM SELF-LOCKING NUTReplace. ADJUSTING

BOLT
ADJUSTING

CAM
SELF-LOCKING NUT

Replace.
SET RING

Replace.ProCarManuals.com

Wheel Alignmen t
Front Turnin g Angl e Inspectio n
NOTE:
• Plac e a ca r o n a leve l surfac e befor e inspection .
• Releas e th e parkin g brak e an d b e sur e tha t th e ca r i s
empty .
• Chec k tha t th e suspension s ar e a t th e standar d
heigh t (se e pag e 18-6 ).
1 . Tur n th e steerin g whee l full y t o th e righ t an d lef t
whil e applyin g th e brake , an d measur e th e turnin g
angl e o f bot h wheels .
Turnin g angle : Inward : 33°0 6 ± 2°
Outward : 26°3 4 (Referenc e value )
2 . I f th e measurement s ar e no t withi n th e specifica -
tions o r i f th e inwar d turnin g angle s diffe r betwee n
the righ t an d left , chec k th e to e an d adjus t accor -
dingl y (se e pag e 18-8 ).
3 . I f th e to e adjustmen t i s withi n specifications , an d
turnin g angl e i s stil l off , chec k fo r ben t o r damage d
suspensio n components .
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7. Remove the flat head screws.

Screw two 8 x 12 mm bolts into the disc to push it

away from the hub.

NOTE: Turn each bolt two turns at a time to pre-

vent cocking the disc excessively.

FLAT HEAD SCREW

6 x 1.0 mm

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

BRAKE DISC

8. Remove the hub unit from the knuckle.
8 x 12 mm

BOLTS

SELF-LOCKING NUT

10 x
1.25
mm

Replace.

65 N-m (6.5 kg-m, 47 Ib-ft)

FRONT HUB UNIT

Corrosion resistant bolt/nut
Front Wheel Bearing Replacement:

1. Raise the locking tab on the spindle nut, then remove

the
nut.

SPINDLE NUT

26 x 1.5 mm

Replace.
Unstake

2. Remove the pulser using a commercially-available

bearing puller.

PULSER
TWO-JAW

PULLER

(Commercially

available)ProCarManuals.com

Front Damper

Removal

1. Remove the front wheel.

2. Remove the brake hose mounting bolt from the

damper.

3. Separate the damper and lower arm by removing

the damper mounting bolt.

BRAKE HOSE MOUNTING BOLT

DAMPER MOUNTING BOLT

Corrosion resistant bolt/nut
SELF-LOCKING NUT

12 x
1.25
mm

Replace.

4. Remove the caps from the top of the cowl, then

remove the self-locking nuts.

5. Remove the damper assembly.

Corrosion resistant bolt/nut

CAP
SELF-LOCKING NUT

10 x
1.25
mm

Replace.
Disassembly/Inspection

Disassembly:

1. Compress the damper spring with the spring com-

pressor according to the manufacturer's instruc-

tions, then remove the self-locking nut.

CAUTION: Do not compress the spring more than

necessary to remove the nut.

SELF-LOCKING NUT

10 x
1.25
mm

Replace.

STRUT SPRING

COMPRESSOR:

(Commercially available)

BRANICK® T/N MST-580A

or equivalent

2. Remove the spring compressor, then disassemble

the damper as shown on the next page.

Inspection:

1. Reassemble all parts, except the spring.

2. Push on the damper assembly as shown.

3. Check for smooth operation through a full stroke,

both compression and extension.

NOTE: The damper should move smoothly. If it

does not (no compression or no extension), the gas

is leaking, and the damper should be replaced.

WOODEN

BLOCK

4. Check for oil leaks, abnormal noises or binding dur-

ing these tests.ProCarManuals.com

Special Tools

Ref.
No.

Tool Number

07HAA – SG00100 or
07HAA – SG00101
07HAE – SG00100
07HAJ – SG00100or
07HAJ – SG0010B

07JAG – SD40100

07KA2 – 001000A

07914 – SA50000
Description

Bleeder T-Wrench

Brake Spring Compressor
ALB Checker (US)
Pushrod Adjustment Gauge
Auxiliary Window Switch
Snap Ring Pliers
Qty

1
1
1
1
1
1
Page Reference
19-62('91-'92)('93-'96),64('91-'92)('93-'96),65('91-'92)
('93-'96),69('91-'92)('93-'96)

19-21, 24

19-41, 43, 64('91-'92)('93-'96),

69('91-'92)('93-'96)

19-15

19-65('91-'92)('93-'96)

19-21,
24
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