ECU ACURA NSX 1997 Service Service Manual

6. Install the new self-locking nuts on the top of the

damper assembly.

STRUT BRACE SELF-LOCKING NUT 10 x 1.25 mm

Replace.

53 N-m (5.4 kgf-m, 39 Ibf-ft)

Corrosion resistant bolt/nut

7. Tighten the damper mounting nut to the specified

torque.

8. Secure the damper assembly to the frame with the

self-locking nuts.

9. Install the strut brace (NSX-T model only).

10. Install the rear hatch glass trim.

TAPPING SCREW REAR HATCH GLASS

11. Install the engine cover support rod onto the strut

brace.

12. Install the rear wheels.ProCarManuals.com

Reassembly
Front Calipe r
CAUTION :
• Befor e reassembling , chec k tha t al l part s ar e fre e o f
dus t an d othe r foreig n particles .
• Replac e part s wit h ne w one s wheneve r specifie d t o
do so .
• Alway s us e Genuin e Hond a DO T 3 Brak e Fluid . Usin g
a non-Hond a brak e flui d ca n caus e corrosio n an d
decreas e th e lif e o f th e system .
• Mak e sur e n o dir t o r othe r foreig n matte r i s allowe d
t o contaminat e th e brak e fluid .
• D o no t spil l brak e flui d o n th e vehicle ; i t ma y damag e
th e paint ; i f brak e flui d doe s contac t th e paint , was h
i t of f immediatel y wit h water .
1 . Clea n th e piston s an d calipe r bore s wit h brak e fluid ,
an d inspec t fo r wea r an d damage .
2 . Appl y silicon e greas e t o ne w pisto n seals , the n
instal l th e pisto n seal s i n th e cylinde r grooves .
3 . Appl y silicon e greas e t o ne w pisto n boots , the n
instal l th e pisto n boot s i n th e cylinde r grooves .
Run-Out Inspectio n
Front Brak e Dis c
1. Rais e eac h sid e of the vehicle , an d suppor t i t o n
safet y stan d (se e pag e 1-10 throug h 1-12 ). Remov e th e
fron t wheels .
2 . Remov e th e brak e dis c pad s (se e pag e 19-7 ).
3 . Inspec t th e dis c surfac e fo r crack s an d rust . Clean
th e dis c thoroughly , an d remov e al l rust .
4 . Us e th e whee l nut s an d plai n washer s t o hol d th e
dis c securel y agains t th e hub , the n moun t a dia l
indicato r a s shown .
Brake Dis c Runout :
Servic e Limit : 0.1 0 m m (0.00 4 in )
5. I f th e dis c is beyon d th e servic e limit , refinis h it .
Max . Refinishin g Limit : 26. 0 m m (1.0 2 in )
4 . Lubricat e th e calipe r cylinder s an d piston s wit h
brak e fluid , the n instal l th e piston s i n th e cylinder s
wit h th e dishe d en d facin g in .
5 . Reinstal l th e calipe r i n th e revers e orde r o f removal .
Always reinstal l th e brak e pad s in thei r
origina l position s to preven t los s o f brakin g efficiency .
6 . Fil l th e brak e reservoi r up , an d blee d th e brak e sys -
te m (se e pag e 19-11 ). NOTE
: A ne w dis c shoul d b e refinishe d i f it s runou t
i s greate r tha n 0.1 0 m m (0.00 4 in) .
ProCarManuals.com

Bleeding

CAUTION:

• Always use Genuine Honda DOT 3 Brake Fluid. Using

a non-Honda brake fluid can cause corrosion and

decrease the life of the system.

• Make sure no dirt or other foreign matter is allowed

to contaminate the brake fluid.

• Do not spill brake fluid on the vehicle, it may damage

the paint; if brake fluid does contact the paint, wash

it off immediately with water.

NOTE: The reservoir on the master cylinder must be full

at the start of bleeding procedure, and checked after

bleeding each brake caliper. Add fluid as required.

Always use Genuine Honda DOT 3 Brake Fluid. Using a

non-Honda brake fluid can cause corrosion and

decrease the life of the system.

BLEEDING SEQUENCE:

1. Have someone slowly pump the brake pedal several

times, then apply steady pressure.

2. Loosen the brake bleed screw to allow air to escape

from the system. Then tighten the bleed screw

securely.

3. Repeat the procedure for each wheel in the

sequence shown above, until air bubbles no longer

appear in the fluid.ProCarManuals.com

Tests
Brake Booster

Functional Test

1. With the engine stopped, depress the brake pedal

several times to deplete the vacuum reservoir, then

depress the pedal hard and hold it for 15 seconds. If

the pedal sinks, either the master cylinder is

bypassing internally, or the brake system (master

cylinder, lines, modulator, proportioning valve, or

calipers) is leaking.

2. Start the engine with the pedal depressed. If the

pedal sinks slightly, the vacuum booster is operat-

ing normally, if the pedal height does not vary, the

booster or check valve is faulty.

3. With the engine running, depress the brake pedal

lightly. Apply just enough pressure to hold back

automatic transmission creep. If the brake pedal

sinks more than 10 mm (3/8 in.) in three minutes,

the master cylinder is faulty. A slight change in

pedal height when the A/C compressor cycles on

and off if normal. (The A/C compressor load

changes the vacuum available to the booster.)

Leak Test

1. Depress the brake pedal with the engine running,

then stop the engine. If the pedal height does not

vary while depressed for 30 seconds, the vacuum

booster is OK. If the pedal rises, the booster is

faulty.

2. With the engine stopped, depress the brake pedal

several times using normal pressure. When the

pedal is first depressed, it should be low. On con-

secutive applications, the pedal height should grad-

ually rise. If the pedal position does not vary, check

the booster check valve.
Booster Check Valve Test

1. Disconnect the brake booster vacuum hose at the

booster or at the booster side of the valve.

2. Start the engine and let it idle. There should be vac-

uum. If no vacuum is available, the check valve is

not working properly. Replace the check valve and

retest.ProCarManuals.com

Pushrod Clearanc e Adjustmen t
Brake Booste r
NOTE: Maste r cylinde r pushrod-to-pisto n clearanc e
mus t b e checke d an d adjustment s made , i f necessary ,
befor e installin g maste r cylinder .
1 . Se t th e specia l too l o n th e maste r cylinde r body ;
pus h i n th e cente r shaf t unti l th e to p o f i t contact s
wit h th e en d o f th e secondar y pisto n b y turnin g th e
adjustin g nut . NOTE
: I f th e clearanc e betwee n th e gaug e bod y
and adjustin g nu t i s 0. 4 m m (0.0 2 in) , th e pushrod -
to-piston clearanc e i s 0 mm . However , i f th e clear -
anc e betwee n th e gaug e bod y an d adjustin g nu t i s 0
mm , th e pushrod-to-pisto n clearanc e i s 0. 4 m m
(0.0 2 in ) o r more . Therefore , i t mus t b e adjuste d an d
rechecked .
6. I f clearanc e i s incorrect , loose n th e sta r locknu t an d
tur n th e adjuste r i n o r ou t t o adjust .
NOTE:
• Adjus t th e clearanc e whil e th e specifie d vacuu m
i s applie d to th e brak e booster .
• Hol d th e clevi s whil e adjusting .
7 . Tighte n th e sta r locknu t securely .
8 . Remov e th e specia l tool , an d instal l a ne w maste r
cylinde r ro d sea l i n th e brak e booster.
PUSHRO D
ADJUSTMEN T GAUG E
07JA G - SD4010 0
PUSHRODADJUSTMEN TGAUGE07JAG - SD4010 0
2. Withou t disturbin g th e cente r shaft' s position ,
instal l th e specia l too l upsid e dow n o n th e brak e
booster .
3. Instal l th e maste r cylinde r nut s an d tighte n t o th e
specifie d torque .
4 . Connec t th e brak e booste r in-lin e wit h a vacuu m
gaug e 0 - 10 1 kP a ( 0 - 76 0 m m Hg , 3 0 in.Hg ) t o th e
booster' s engin e vacuu m supply , an d maintai n a
engin e spee d tha t wil l delive r 6 6 kP a (50 0 m m Hg ,
2 0 in.Hg ) vacuum .
5 . Wit h a feele r gauge , measur e th e clearanc e
betwee n th e gaug e bod y an d th e adjustin g nu t a s
shown .
Clearance : 0 - 0. 4 m m (0 - 0.0 2 in )
9. Adjus t th e pushro d lengt h a s show n i f th e booste r
is removed .
10 . Instal l th e maste r cylinde r (se e pag e 19-13 ).
11 . Afte r installation , perfor m th e followin g inspection s
an d adjus t i f necessary .
• Brak e peda l heigh t (se e pag e 19-5 ).
• Brak e peda l fre e pla y (se e pag e 19-5 ).
ProCarManuals.com

Inspection/Replacement (cont'd)
Rear Brake Pads

11. Install and tighten the two caliper mounting bolts.

12. Insert the cable through the arm, and connect the

cable to the lever with the clevis pin and new lock

pin. Install the new cable clip securely.

13. Install the caliper shield.

14. Depress the brake pedal several times to make sure

the brakes work, then test-drive the vehicle.

NOTE: Engagement of the brake may require a

greater pedal stroke immediately after the brake

pads have been replaced as a set. Several applica-

tions of the brake pedal will restore the normal

pedal stroke.

15. Install the rear wheels and torque the wheel nuts.

NOTE: Clean the mating surfaces of the wheel and

hub before installing the wheel.ProCarManuals.com

Rear Brak e Dis c
Run-Ou t Inspectio n
1. Rais e eac h sid e o f th e vehicle , an d suppor t i t o n
safet y stand s (se e pag e 1-10 throug h 1-12 ). Remov e th e
rea r wheels .
2 . Remov e th e brak e pad s (se e pag e 19-18 ).
3 . Inspec t th e dis c surfac e fo r grooves , cracks , an d
rust . Clea n th e dis c thoroughl y an d remov e al l rust .
4 . Us e th e whee l nuts and plai n washer s t o hol d th e
dis c securel y agains t th e hub , the n moun t a dia l
indicato r a s shown .
Brak e Dis c Runout :
Servic e Limit : 0.1 0 m m (0.00 4 in )
5 . I f th e dis c i s beyon d th e servic e limit , refinis h th e
rotor .
Max. Refinishin g Limit : 21. 0 m m (0.8 3 in )
NOTE : A ne w dis c shoul d b e refinishe d i f it s runou t
i s greate r tha n 0. 1 m m (0.00 4 in) .
ProCarManuals.com

8. Instal l a ne w cu p wit h it s groov e facin g th e bearin g
A sid e o n th e adjustin g bolt .
9 . Fi t th e bearin g A , spacer , adjustin g sprin g B an d
sprin g cove r o n th e adjustin g bolt , an d instal l i n th e
calipe r cylinder .
NOTE: Instal l th e bearin g A wit h it s ope n en d fac -
ing th e spacer .
11. Instal l th e specia l too l a s shown .
12 . Compres s th e sprin g unti l i t bottom s out .
13 . Chec k tha t th e flare d en d o f th e sprin g cove r i s
belo w th e circli p groove .
14 . Instal l th e circlip , the n remov e th e brak e sprin g
compressor .
NOTE: Chec k tha t th e circli p is seate d in th e groov e
properly .
SNAP RIN G PLIER S07914-SA5000 0
BRAKE SPRIN GCOMPRESSO R07HAE - SG0010 0
15. Instal l th e adjustin g nut , adjustin g sprin g A , an d
washer , the n secur e wit h th e circlip .
10
. Adjus t th e specia l too l a s shown .
BRAKE SPRIN G COMPRESSO R07HAE-SG0010 0
ProCarManuals.com

Accumulator/Pressure
Switc h Remova l
1. Drai n th e hig h pressur e brak e flui d fro m th e powe r
uni t (se e pag e 19-77 ).
2 . Remov e thre e 6 m m flang e bolts , the n remov e th e
accumulato r fro m th e pressur e switc h joint .
Accumulato r Disposa l
The accumulato r contain s high-pressur e
nitroge n gas ; d o no t puncture , expos e t o flame , o r
attemp t t o disassembl e th e accumulato r o r i t ma y
explode ; sever e persona l injur y ma y result .
1 . Secur e th e accumulato r i n a vis e s o tha t th e relie f
plug point s straigh t up .
2. Slowl y tur n th e plu g 3-1/ 2 turns , the n wai t 3 min -
utes fo r al l pressur e t o escape .
3. Remov e th e plu g completely , an d dispos e o f th e
accumulato r unit .
ProCarManuals.com

Doors

Disassembly (cont'd)

5. Remove the mounting screws. Lift the door panel

straight up off the sill.

Disconnect the connectors:

• Trunk lid opener

• Power window/Door mirror

• Courtesy light

• Security alarm

DOOR PANEL
CONNECTORS

MOUNTING SCREW

6. Remove the switch panel and air duct from the

door panel as required.

SWITCH PANEL

AIR DUCT

DOOR PANEL
7. Remove the mounting screws and disconnect the

connectors, then remove the power window con-

trol unit and speaker unit.

POWER WINDOW

CONTROL UNIT

CONNECTORS

MOUNTING

SCREW

SPEAKER UNIT

CONNECTOR

8. Remove the lower door weatherstrip retaining

clips, then pull off the lower door weatherstrip.

Remove the screw grommets, and carefully remove

the plastic cover.

Clip locations
Clip locations

LOWER

WEATHERSTRIP
PLASTIC COVER
LOWER

WEATHERSTRIP
LOWER

WEATHERSTRIP

SCREW GROMMETSProCarManuals.com