1997 ACURA NSX Service Repair Manual

Interlock System

Key Interlock Solenoid Test

1. Remove the dashboard lower cover, and disconnect

the floor wire harness connectors.

DASHBOARD

LOWER

COVER

2. Disconnect the 8P connector from the floor wire

harness.

View from wire side
3. Check for continuity between the terminals in each

switch position according to the table.

4. Check that the key cannot be removed with power

and ground connected to the C and B terminals.

If the key cannot be removed, the key interlock

solenoid is OK.

If the key can be removed, replace the steering

lock assembly (key interlock solenoid is not avail-

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Shift Loc k Solenoi d Test/Replacemen t
Test:
1. Remov e th e cente r consol e pane l an d dashboar d
(se e sectio n 20 ).
2 . Disconnec t th e 3 P connecto r o f th e shif t loc k
solenoi d fro m th e floo r wir e harness .
NOTE : Thi s solenoi d ha s a diod e i n it . T o ge t a n
accurat e reading , eithe r tes t i t wit h a volt-ohmmete r
tha t compensate s fo r diodes , o r mak e sur e yo u con -
nect you r tes t lead s t o matc h th e polarit y shown .
3. Connec t batter y powe r t o th e A termina l an d
groun d t o th e B termina l momentarily , an d chec k t o
se e i f th e solenoi d works .
View fro m wir e sid e
SHIF T LOC K
SOLENOI D
4. Whe n th e shif t loc k solenoi d i s ON , chec k tha t ther e
i s a clearanc e o f 2. 5 ± 0. 5 m m (0.09 8 ± 0.02 0 in )
betwee n th e to p corne r o f th e shif t loc k leve r an d
th e sid e o f th e loc k pin .
LOC K PI N2.510. 5 m m(0.09 8 ± 0.02 0 in )SHIF T LOC K
LEVE R
If clearanc e is correct , g o t o th e nex t step .
I f clearanc e i s incorrect , loose n th e self-lockin g
nuts , an d adjus t th e solenoi d a s needed . 5
. Whe n th e shif t loc k solenoi d i s OFF , mak e sur e tha t
th e loc k pi n i s blocke d b y th e to p o f th e shif t loc k lever .
LOCK PI N
SHIF T LOC K
LEVER
If i t i s no t blocked , adjus t th e positio n o f th e shif t
loc k solenoi d a s neede d t o bloc k it .
Replacement :
1. Remov e th e E rin g an d th e solenoi d pin .
SOLENOI D PI N
E RING SELF-LOCKIN G NUT SReplac e
9. 8 N- m (1. 0 kgf-m ,
7 Ibf-ft )
2. Remov e th e self-lookin g nut s an d shif t loc k
solenoid .
3 . Instal l th e ne w shif t loc k solenoi d i n th e revers e
orde r o f removal .
4. Chec k th e positio n o f th e shif t loc k solenoi d a s
describe d in step s 3 an d 4 .
I
f i t doe s no t work , replac e it .
I f i t works , g o t o ste p 3 .
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Interlock Syste m
Parkin g Pi n Switc h Test/Replacemen t
1. Remov e th e cente r consol e pane l an d dashboar d
(see section 20 ).
2. Disconnec t th e 2 P connecto r o f th e parkin g pi n
switc h fro m th e floo r wir e harness .
3 . Chec k fo r continuit y betwee n th e terminal s i n eac h
switc h leve r positio n accordin g t o th e table .
View fro m
termina l sid e
PRES S
2PCONNECTO R
PARKING PI N SWITC H
4. I f necessary , replac e th e parkin g pi n switch . 5
. Remov e th e self-lockin g nu t an d parkin g pi n switch .
2PCONNECTO R
PARKING PI N
SWITC H
SELF-LOCKING NU T
Replace .3 N- m (0. 3 kgf-m , 2. 2 Ibf-ft )
PUSH
BUTTO N
Pressed
Release d
Push
butto n
Positio n
Termina lAB
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Safety Indicato r
Componen t Locatio n Inde x
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 i n th e
SR S sectio n 24 befor e performin g repair s o r service .
SAFET Y INDICATO R (I n th e gaug e assembly )
• Removal , pag e 23-12 9
• Troubleshooting , pag e 23-15 4
• Inpu t Test , pag e 23-15 2
ROOF LOC K SWITC H (*1 )
Test , pag e 23-15 6
PASSENGER' S DOO R SWITC H
Test , pag e 23-20 6
HIG H MOUN T BRAK E LIGH T
Test , pag e 23-21 3
CEILIN
G LIGH T
Test , pag e 23-20 3
BRAK E SWITC H
Test , pag e 23-21 3
DRIVER' S DOO R SWITC H
Test , pag e 23-20 6
ROO F HOLDE R SWITC H (*1 )
Test , pag e 23-15 7
ENGIN E COMPARTMEN T LI D SWITC H
Test , pag e 23-32 7 RIGH
T BRAK E LIGH T
FAILUR E SENSO R
Test , pag e 23-15 5
LEF T BRAK E LIGH T
FAILUR E SENSO R
Test , pag e 23-15 5 TRUN
K LATC H SWITC H
Test , pag e 23-20 7
1: NSX- T (ope n top ) onl y
Descriptio n
Safety Indicato r System :
LEDs ar e use d t o indicat e whe n th e trun k lid , engin e compartmen t lid , a door , o r th e roo f i s no t latched , o r whe n a brak e
light i s faulty , o r whe n th e roo f i s no t store d o r improperl y store d i n it s holder . Th e LED s wil l g o o n an d sta y o n fo r abou t
tw o second s afte r th e ignitio n switc h ha s bee n turne d O N (II ) t o sho w tha t th e syste m circui t i s functioning .
Brak e Ligh t Bul b Failur e Indicator :
If al l brak e ligh t bulb s ar e OK , th e indicato r ligh t stay s of f becaus e th e ORN/WH T wir e is grounde d b y th e tw o brak e ligh t
failur e sensor s connecte d i n series . Wit h th e brak e light s off , th e groun d i s provide d throug h th e diode , th e failur e senso r
rela y coils , an d bul b filaments . Wit h th e brak e ligh t on , al l fou r relay s (tw o i n th e lef t sensor , tw o i n th e righ t sensor) , con -
necte d i n series , suppl y ground . I f an y o f th e fou r bulb s i s no t working , th e chai n i s broke n an d th e ORN/WH T wir e i s no t
longe r grounded . Th e indicato r ligh t come s on .
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Safety Indicato r
Indicator Inpu t Tes t
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 i n th e
SR S (sectio n 24 ) befor e performin g repair s o r service .
Remov e th e dashboar d lowe r cover , dashboar d lowe r
pa d an d instrumen t panel . Disconnec t th e connecto r "A "
(30-P ) fro m th e gaug e assembl y (se e pag e 23-127 ).
Inspec t th e connecto r an d socke t terminal s t o b e sur e the y
ar e al l makin g goo d contact .
I f th e terminal s ar e bent , loose , o r corroded , repai r
the m a s necessary , an d rechec k th e system .
I f th e terminal s loo k OK , mak e th e followin g inpu t
test s a t th e connector .
— If a tes t indicate s a problem , fin d an d correc t th e
cause , the n rechec k th e system .
— If al l th e inpu t test s prov e OK , th e contro l uni t
mus t b e faulty ; replac e it .
CONNECTO R "B "
CONNECTO R "A "
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Wire Tes
t conditio n
Test: Desire d resul t Possible caus e if resul t i s no t obtaine d
BLKUnde r al l condition sCheck fo r continuit y t o ground :
Ther e shoul d b e continuity . •
Poo r groun d (G401 , G402 , G403 )
• A n ope n in th e wir e
YELIgnitio n switc h O N (II ) Check fo r voltag e t o ground :
Ther e shoul d b e batter y voltage . •
Blow n No . 5 (1 5 A ) fus e
• A n ope n i n th e wir e
Brak e peda l pushe d Check fo r continuit y t o ground :
Ther e shoul d b e les s tha n 4 W wit h
th e peda l pushed .
ORN/WH T
• Blow n No . 4 5 (2 0 A ) fus e
• Fault y brak e switc h
• Blow n brak e ligh t bulb s
• Fault y brak e ligh t failur e sensor s
• Poo r groun d (G551 )
• A n ope n in th e ORN/WH T o r
GRN/WH T wir e
BLU
Engin e compartmen t li d
ope n
Chec k fo r continuit y t o ground :
There shoul d b e continuity .
• Fault y engin e compartmen t li d
switc h
• Poo r groun d (G401 , G402 , G403 )
• A n ope n i n th e wir e
Trun k li d ope n
GRN/BL K
Check fo r continuit y t o ground :
Ther e shoul d b e continuity .
NOTE : Befor e testing , remov e th e
No . 3 4 (1 5 A ) fuse . •
Fault y trun k latc h switc h
• Poo r groun d (G551 )
• A n ope n in th e wir e
GRN/BL UDriver's doo r ope n
GRN/RE DPassenger' s doo r ope n Chec
k fo r continuit y t o ground :
Ther e shoul d b e continuity .
NOTE : Befor e testing , remov e th e
No . 3 4 (1 5 A ) fuse . •
Fault y doo r switc h
• Poo r groun d (G401 , G402 , G403 )
• A n ope n i n th e wir e
BLK/WH T
Ceiling ligh t switc h i n
MIDDL E positio n Connec
t t o ground : Th e ceilin g ligh t
shoul d com e on . •
Blow n No . 3 4 (1 5 A ) fus e
• Fault y ceilin g ligh t
• A n ope n in th e WHT/BL U o r
BLK/WHTwir e
RED/YEL
RED/YEL1
Retractabl e headligh t
sub-harnes s (lef t o r
right ) disconnecte d*1 Connec
t batter y powe r t o th e
BLU/RE D termina l (righ t retractor ) o r
BL U termina l (lef t retractor) ; afte r
abou t fou r second s ther e shoul d b e
batter y voltage . •
Fault y retractabl e headligh t contro l
unit
• Seized , damaged , o r improperl y
installe d retracto r linkag e
Roo f unlatche d o r of f Check fo r continuit y t o ground :
Ther e shoul d b e continuity .
*2RED/YEL2
• Fault y roo f holde r switc h
• Fault y roo f loc k switche s
• Poo r groun d (G401 , G402 , G403 )
• A n ope n in th e RED/YEL
2 o r
BLU/GR N wir e
• A n ope n in bot h th e RED/GR N an d
RED/YEL3 wire s
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Safety Indicato r
Troubleshootin g
NOTE: Th e number s i n th e tabl e sho w th e troubleshootin g sequence .
e p ag )
8
0
( s e e
2 3 -1
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Brake Ligh t Failur e Senso r Tes t
1. Firs t mak e sur e th e brak e light s com e o n whe n th e
brak e peda l i s pressed .
I f al l th e brak e light s com e on , g o t o ste p 2 .
I f on e o f th e brak e light s doe s no t com e on , chec k
whethe r th e bul b i s blown . I f th e bul b i s OK , g o
t o ste p 2 .
I f non e o f th e brak e light s com e on , chec k th e
brak e ligh t circui t.
2 . Ope n th e trun k lid , an d remov e th e tri m pane l tha t
cover s th e righ t taillight . Watc h th e
ligh t i n th e safet y indicato r whe n th e A (WHT/GRN )
wir e o f th e 6 P connecto r i s grounde d an d th e igni -
tio n switc h is turne d fro m OF F to O N (II) .
RIGH T FAILUR E SENSO R
6 P CONNECTO R
Vie w fro m wir e sid e LEF
T FAILUR E SENSO R
6 P CONNECTO R
View fro m wir e sid e
If th e ligh t come s o n an d stay s
on, ther e is a n ope n in th e A (GRN ) wir e betwee n
th e lef t failur e senso r an d th e righ t failur e sensor .
If th e ligh t doe s no t sta y on , g o
t o ste p 5 .
5. Watc h th e ligh t a s yo u tur n th e igni -
tio n switc h fro m OF F to O N (II ) wit h th e B (BLK ) wir e
o f th e 6 P connecto r grounde d an d th e brak e peda l
pressed .
If th e ligh t come s o n an d stay s
on , replac e th e lef t failur e sensor .
If th e ligh t doe s no t sta y on , chec k
fo r a n ope n in th e B (BLK ) wir e betwee n th e lef t
failur e senso r an d ground , an d chec k fo r a poo r
groun d a t G551 .
If th e ligh t come s o n an d stay s
on , chec k fo r a n ope n in th e A (WHT/GRN ) wir e
betwee n th e safet y indicato r an d th e righ t failur e
sensor .
If th e ligh t doe s no t sta y on , g o
to ste p 3 .
3. Watc h th e ligh t a s yo u tur n th e igni -
tio n switc h fro m OF F t o O N (II ) wit h th e B (GRN )
wir e o f th e 6 P connecto r grounde d an d th e brak e
peda l pressed .
If th e ligh t come s o n an d stay s
on , replac e th e righ t failur e sensor .
If th e ligh t doe s no t sta y on , g o t o
ste p 4 . 4
. Remov e th e rea r tri m pane l tha t cover s th e lef t tail -
light . Watc h th e ligh t a s yo u tur n th e
ignitio n switc h fro m OF F to O N (II ) wit h th e A (GRN )
wir e o f th e 6 P connecto r grounde d an d th e brak e
pedal pressed .
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