ACURA NSX 1997 Service Repair Manual

Battery
Test
Batter y flui d (electrolyte ) contain s sulfuri c acid . I t ma y caus e sever e burn s i f i t get s o n you r ski n o r i n you r eyes .
Wea r protectiv e clothin g an d a fac e shield .
— If electrolyt e get s o n you r ski n o r clothes , rins e i t of f wit h wate r immediately .
— If electrolyt e get s in you r eyes , flus h it ou t b y splashin g wate r i n you r eye s fo r a t leas t 1 5 minutes ; cal l a physicia n
immediately .
A batter y give s of f hydroge n gas. If ignited , th e hydroge n wil l explod e an d coul d crac k th e batter y cas e an d splatte r
aci d o n you . Kee p sparks , flames , an d cigarette s awa y fro m th e battery .
Overchargin g wil l rais e th e temperatur e o f th e electrolyte . Thi s ma y forc e electrolyt e t o spra y ou t o f th e batter y vents .
Follo w th e charge r manufacturer' s instruction s an d charg e th e batter y a t a prope r rate .
Us e eithe r a JC I o r Bea r ARBS T tester , an d follo w th e manufacturer' s procedures . I f yo u don' t hav e on e of thes e com -
puterize d testers , follo w thi s conventiona l tes t procedure :
To ge t accurat e results , th e temperatur e o f th e electrolyt e mus t b e betwee n 70° F (2 1°C ) an d 100° F (38°C) .
Check Fo r Damag e
I f th e cas e i s cracke d o r th e post s ar e loose ,
replac e th e battery .
Chec k Indicato r EY E Colo r
If th e indicato r show s low electrolyte , ad d
distille d wate r i f possible .
EYE Indicate s O KEY E Indicate s LO W
CHARG E
Test Loa d Capacit y (#1 )
Appl y 30 0 am p loa d fo r 1 5 second s t o remov e
surfac e charge .
Allo w 1 5 second s recover y period .
Appl y tes t loa d (se e Tes t Loa d Chart) .
Recor d voltag e a t th e en d o f 1 5 seconds .
Stay s abov e 9. 6 volts ;
batter y is OK .
Drop s belo w 9. 6 volts .
ProCarManuals.com

Charge o n Hig h Settin g (4 0 amps )
Charge unti l EY E show s charg e is OK ; plu s a n
additiona l 3 0 minute s t o assur e ful l charge .
NOTE : I f th e batter y charg e i s ver y low , i t ma y
b e necessar y t o bypas s th e charger' s polarit y
protectio n circuitry .
If th e EY E doe s no t sho w charg e i s O K withi n
three hours , th e batter y i s no-good ; replac e it .
Writ e dow n ho w lon g th e batter y wa s charged .
Tes t Loa d Capacit y (#2 )
Appl y 30 0 am p loa d fo r 1 5 second s t o remov e surfac e charge .
Allo w 1 5 second s recover y period .
Appl y tes t loa d (se e Tes t Loa d Chart) .
Recor d voltag e a t th e en d o f 1 5 seconds .
Stay s abov e 9. 6 volts ; batter y i s OK .
Drops belo w 9. 6 volts ; batter y i s no-good .
Use th e tes t loa d o f 11 2 th e col d crankin g amp s (CCA ) printe d o n
th e labe l o n th e to p o f th e battery . I f neithe r i s indicated , us e th e
informatio n below :
TEST LOA D CHAR T
BATTER Y
CODE
80
7 0
COL D CRANKIN G
AMP S (CCA )
550
440
LOA D
(amps )
270
220
ProCarManuals.com

Under-dash Fus e Bo x
Removal/Installatio n
SRS component s ar e locate d in thi s area . Revie w th e SR S
componen t locations , precautions , an d procedure s in th e
SR S ( sectio n 24 ) befor e performin g repair s o r service .
Removal :
1. Disconnec t bot h th e negativ e cabl e an d positiv e
cabl e fro m th e battery .
2 . Carefull y remov e th e sid e sil l pa d (pul l i t up , rea r
en d first) .
3 . Remov e th e fus e bo x door .
FUSE BO XDOO R
SIDE SIL L PA D
SIDE SIL L TRI M
4. Remov e th e thre e screws , the n remov e th e sid e sil l
trim .
5. Remov e th e under-das h fus e bo x mountin g bolts . 6
. Disconnec t th e under-das h fus e bo x connectors .
NOTE : Th e SR S mai n harnes s connecto r i s doubl e
locked . T o remov e it , firs t lif t th e connecto r lid ,
the n pres s th e connecto r ta b dow n an d pul l th e
connecto r out .
LIDTA B
SRS MAI N HARNES S
7. Tak e ou t th e under-das h fus e box .
ProCarManuals.com

Installation:

1. Connect the connectors to the under-dash fuse

box.

NOTE: To reinstall the SRS main harness connec-

tor, push it into position until it clicks, then close

the connector lid.

2. Install the under-dash fuse box.

3. Install the side sill trim, fuse box door and door sill

pad.

FUSE BOX

DOOR

SIDE SILL PAD

SIDE SILL TRIM

4. Connect both the negative cable and positive cable

to the battery.

5. Confirm that all systems work properly.ProCarManuals.com

Ignition Switch

Test

1. Remove the dashboard lower cover (see next

column).

2. Disconnect the 7P connector from the floor wire

harness.

3. Check for continuity between the terminals in each

switch position according to the table.

7P CONNECTOR

BLK/YEL (IG1)

BLU/WHT (IG2-B)
View from

wire side

BLK/WHT 1ST)

WHT/BLK (BAT-B)

WHT/RED (ACC)
Electrical Switch Replacement

1. Remove the dashboard lower cover, and disconnect

the floor wire harness connectors.

DASHBOARD

LOWER

COVER

2. Disconnect the 7P connector from the floor wire

harness.

3. Insert the key, and turn it to "0".

4. Remove the two screws, and replace the switch.

LOCK CYLINDER

SWITCH
WHT (IG2-A)

WHT (BAT-A)ProCarManuals.com

Steering Loc k Removal/Installatio n
SRS component s ar e locate d in thi s area . Revie w th e SR S
componen t locations , precautions , an d procedure s in th e
SR S (sectio n 24 ) befor e performin g repair s o r service .
1 . Remov e th e dashboar d lowe r cover , an d disconnec t
the connectors .
2. Remov e th e dashboar d lowe r pad .
DASHBOAR D LOWE R
COVE R
3. Remov e the tilt cover .
DASHBOAR D LOWE RPAD
TIL T COVE R
4. Remov e th e steerin g colum n lowe r an d uppe r cov -
ers. B e carefu l no t t o damag e th e steerin g colum n
covers .
UPPER COVE R
LOWE R COVE R
5. Remov e th e dashboar d brace .
DASHBOAR D BRAC E
6. Disconnec t th e ignitio n switc h 7 P an d 8 P connec -
tors.
7. Remov e th e colum n holde r mountin g bolt s an d th e
mountin g nuts , an d lowe r th e steerin g colum n
assembly . B e carefu l no t t o damag e th e SR S wir e
harness .
16 N- m(1.6 kgf-m , 1 2 Ibf-ft )
.39 N- m(4.0 kgf-m , 2 9 Ibf-ft )
(cont'd )
ProCarManuals.com

Ignition Switch

Steering Lock Removal/Installation (cont'd)

8. Center-punch the shear bolt, and drill its head off

with a 5 mm (3/16 in) drill bit. Do not damage the

switch body.

9. Remove the shear bolt from the switch body.

10. Insert the key, and turn it to "I".

11. Push the lock pin, and pull out the steering lock

assembly.

STEERING LOCK

BODY
Installation:

1. Turn the key to "I", push the pin, and insert the

steering lock assembly into the steering column

until it clicks into place.

2. Loosely tighten the new shear bolt. Make sure the

projection on the ignition switch is aligned with the

hole in the steering column.

3. Insert the ignition key, and check for proper opera-

tion of the steering wheel lock and that the ignition

key turns freely.

4. Tighten the shear bolt until the hex head twists off.

5. Install in the reverse order of removal. Install the 3P

connector harness carefully because this harness

serves as communication link.

SHEAR BOLT

TWIST-OFF PORTION

6. After installing, check the immobilizer system.ProCarManuals.com

Starting Syste m
Componen t Locatio n Inde x
A/T GEA R POSITIO N SWITC H
(Neutra l positio n switch )
•Test , pag e 23-16 0
• Replacement , pag e 23-163
IMMOBILIZE R CONTRO L
UNITInpu t Test , pag e 23-33 4
CLUTC H INTERLOC K
SWITC H (M/T )
Test , pag e 23-8 0
STARTE R• Test , pag e 23-7 8• Solenoi d Test , pag e 23-8 1• Replacement , pag e 23-8 1
• Overhaul , pag e 23-8 2
• Reassembly , pag e 23-8 7
STARTE
R CU T RELA Y
Wire colors : BLK/WHT , BLK/BLU ,BLK/WHT an d BLK/GR NTest, pag e 23-8 0
ProCarManuals.com

Starting Syste m
Descriptio n
Starter Interloc k Syste m (M/T) :
Th e starte r interloc k syste m prevent s th e engin e fro m startin g unles s th e clutc h peda l i s full y depressed .
The clutc h interloc k switc h turn s o n a t th e positio n wher e th e clutc h disengages : 1 5 - 2 0 m m (0.5 9 - 0.7 9 in ) fro m full y
depresse d position .
NOTE: A ful l strok e o f th e clutc h peda l i s 12 5 m m (4.9 2 in ) fro m th e full y release d position .
CLUTCH INTERLOC K SWITC H
Full y Release d
Positio n
CLUTC
H PEDA L
ProCarManuals.com

Starting Syste m
Starte r Tes t
NOTE : Th e ai r temperatur e mus t b e betwee n 5 9 an d
100° F (1 5 an d 38°C ) befor e testing .
Recommende d Procedure :
Use a starte r syste m tester .
Connec t an d operat e th e equipmen t i n accor -
danc e wit h manufacturer' s instructions .
Alternat e Procedure :
Us e th e followin g equipment :
— Ammeter , 0 - 40 0 A
— Voltmeter , 0 - 2 0 V (accurat e withi n 0. 1
volt )
— Tachometer , 0 -1,20 0 rp m
Hoo k u p voltmete r an d ammete r a s shown .
NEGATIV E CABL E
POSITIV ECABLE
1. Disconnec t th e No . 1 3 (3 0 A ) fus e fro m th e engin e
compartmen t fuse/rela y box .
No. 1 3 (3 0 A )FUS E
2. Chec k th e starte r engagement :
Depres s th e clutc h peda l al l th e wa y (M/T ) o r shif t
to o r positio n (A/T) , an d tur n th e ignitio n
switc h t o "Star t (III)" . Th e starte r shoul d cran k th e
engine .
NOTE: O n car s equippe d wit h manua l transmis -
sion , th e engin e wil l no t cran k unles s th e clutc h
peda l i s full y depressed .
I f th e starte r stil l doe s no t cran k th e engine ,
chec k th e battery , batter y positiv e cable ,
ground and th e wir e connection s fo r loosenes s
o r corrosion .
Tes t again .
If th e starte r stil l doe s no t cran k th e engine ,
bypas s th e ignitio n switc h circui t a s follows :
Unplu g th e connecto r (BLK/WH T wire ) fro m th e
starter . Connec t a jumpe r wir e fro m th e batter y
positiv e ( + ) termina l t o th e solenoi d terminal .
Th e starte r shoul d cran k th e engine .
SOLENOI D TERMINA L
BLK/WHTWIRE
ProCarManuals.com