ECU ACURA NSX 1997 Service Repair Manual

Lock-up Contro l Solenoi d Valv e A/ B
Replacemen t
1. Disconnec t th e 2 P connecto r fro m th e lock-u p con -
tro l solenoi d valv e assembly .
2 . Measur e th e resistanc e betwee n th e No . 2 termina l
(solenoid valv e A ) o f th e lock-u p contro l solenoi d
valve connecto r an d bod y ground , an d betwee n th e
No . 1 termina l (solenoi d valv e B ) an d bod y ground .
LOCK-U P CONTRO L
SOLENOI D VALV E
ASSEMBL Y
TERMINAL SID E O FMAL E TERMINAL S
3. Replac e th e lock-u p contro l solenoi d valv e assem -
bl y if th e resistanc e is ou t o f specification .
4 . I f th e resistanc e i s withi n th e standard , connec t th e
No . 1 termina l o f th e lock-u p contro l solenoi d valv e
connecto r t o th e batter y positiv e terminal . A clickin g
soun d shoul d b e heard . Connec t th e No . 2 termina l t o
th e batter y positiv e terminal . A clickin g soun d shoul d
b e heard . Replac e th e lock-u p contro l solenoi d valv e
assembl y if n o clickin g soun d is heard . NOTE
: Lock-u p contro l solenoi d valve s A an d B mus t b e
removed/replace d a s a n assembly .
1 . Remov e th e mountin g bolt s an d lock-u p contro l
solenoi d valv e assembly .
Clean mountin g surfac e
an d flui d passages . LOCK-U
P CONTRO L
SOLENOI D VALV E
ASSEMBL Y
FILTER/GASKE TReplace.
6 x 1. 0 m m12 N- m (1. 2 kgf-m , 8. 7 Ibf-ft )
2. Clea n th e mountin g surfac e an d flui d passages ,
the n instal l a ne w lock-u p contro l solenoi d valv e
assembl y wit h a ne w filter/gasket .
3 . Chec k th e connecto r fo r rust , dirt , o r oi l the n recon -
nec t i t securely .
Test
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Shift Contro l Solenoi d Valv e A/ B
Tes t
1. Disconnec t th e 2 P connecto r fro m th e shif t contro l
solenoi d valv e assembly .
2 . Measur e th e resistanc e betwee n th e No . 1 termina l
(solenoi d valv e A ) o f th e shif t contro l solenoi d valv e
connecto r an d bod y ground , an d betwee n th e No . 2
termina l (solenoi d valv e B ) an d bod y ground .
SHIFT CONTRO L
SOLENOI D VALV E
ASSEMBL Y
TERMINAL SID E O F
MAL E TERMINAL S
3. Replac e th e shif t contro l solenoi d valv e assembl y if
th e resistanc e is ou t o f specification .
4 . I f th e resistanc e is withi n standard , connec t th e No .
1 termina l o f th e shif t contro l solenoi d valv e con -
necto r t o th e batter y positiv e terminal . A clickin g
soun d shoul d b e heard . Connec t th e No . 2 termina l
t o th e batter y positiv e terminal . A clickin g soun d
shoul d b e heard . Replac e th e shif t contro l solenoi d
valv e assembl y if n o clickin g soun d is heard .
Replacemen t
NOTE: Shif t contro l solenoi d valve s A an d B mus t b e
removed/replace d a s a n assembly .
1 . Remov e th e mountin g bolt s an d shif t contro l sole -
noi d valv e assembly .
SHIFT CONTRO L
SOLENOI D VALV E
ASSEMBL Y
FILTER/GASKE T
Replace .Clean mountin gsurface an d flui dpassages .
6 x 1. 0 m m12 N- m11. 2 kgf-m , 8. 7 Ibf-ft )
2. Clea n th e mountin g surfac e an d flui d passages ,
the n instal l a ne w shif t contro l solenoi d valv e
assembl y wit h a ne w filter/gasket .
3 . Chec k th e connecto r fo r rust , dirt , o r oil , the n recon -
nec t i t securely .
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Shift Loc k Releas e Cove r
Installatio n ——————————
Take th e "SHIF T LOC K RELEASE " cove r of f th e A/ T
gea r positio n indicato r panel , an d pee l of f th e
remainin g adhesive .
Clea n th e indicato r pane l thoroughl y wit h a spong e
dampene d in alcohol .
SHIFT LOC K RELEAS ECOVER
A/ T GEA R POSITIO N
INDICATO R PANE L Pee
l of f th e
remainin gadhesive .
2. Remov e th e peel-of f backin g fro m th e ne w cover .
3 . Instal l th e cove r b y alignin g th e righ t en d wit h th e
hollo w egde , an d pres s th e cove r wit h you r finger s
to secur e it .
Mak e sur e th e ne w cove r doe s no t mov e o r i s no t
take n off .
COVE R
HOLLO W EDG E
KEYHOL E
4. Mak e sur e th e slo t o n th e lef t en d o f th e cove r i s
exposed . I f th e slo t i s covered , remov e th e cove r
an d reinstal l i t properly .
SLOT COVE
R
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Interior Tri m
Replacemen t
Coupe:
Disassembl e in numbere d sequence .
NOTE:
• Whe n removin g th e rea r tri m panels , tak e car e no t t o
damag e th e contro l unit s an d relays .
• Tak e car e no t t o scratc h th e tri m panels .
Installatio n i s th e revers e o f th e remova l procedure .
NOTE :
• I f necessary , replac e an y damage d clips .
• Mak e sur e th e chil d sea t tethe r ancho r i s
installe d securely .
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CAUTION: (if roof maintenance is required)

Be careful not ot bend the edge of the roof opening.

The roof is made of aluminum alloy. Take care not to dent or scratch the roof. If there is a minor dent or scratch on the roof, repair
the roof with putty (refer to the body repair manual).

When replacing the component parts of the roof, place the roof on an appropriate pad to prevent damage.
NOTE:

Have an assistant help remove the roof.

When the roof is stored on the engine cover, lock the roof cover securely.

When installing the roof, secure it by turning both roof side lock handles. Make sure they are locked securely.
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Radiator
10. Afte r tightenin g al l th e bleedin g bolt s and plug , fil l
th e expansio n tan k wit h coolan t u p t o th e MA X line .
11 . Loose n th e therm o cove r blee d bol t t o remov e an y
remainin g air .
12 . Whe n bleedin g i s completed , retighte n th e therm o
cove r blee d bol t an d fil l th e expansio n tan k u p t o
0. 5 (0.5 3 US qt , 0.4 4 Imp qt ) o r 3 0 m m (1. 2 in)
ove r th e MA X line . 1
3 . Instal l th e expansio n tan k cap , an d tur n it 6 0 degree s
(where i t engage s th e firs t loc k ta b o f fille r neck) .
14. Star t th e engine , an d le t i t ru n unti l warme d u p (unti l
th e thermosta t open s an d th e radiato r coolin g fa n
runs) .
15. Tur n of f th e engine . Chec k th e expansio n tan k and ,
i f needed , ad d coolan t t o brin g i t u p t o th e MA X
line.
16. Tighte n th e expansio n tan k ca p securely .
17 . Reinstal l th e cove r o n th e car' s underside .
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Description
Security Alar m System :
Th e securit y alar m syste m is a n anti-thef t alar m system . I f someon e trie s t o ope n th e trunk , hoo d o r eithe r doo r withou t
th e ignitio n key , o r i f th e roo f i s no t full y latched , th e securit y contro l uni t sense s a signa l fro m th e sensor s an d activate s
relay s t o flas h th e headlight s an d soun d th e hor n fo r abou t tw o minutes .
SECURIT Y CONTRO LUNITInpu t Test , pag e 23-5 8
RIGH T (HIGH ) HOR N
Test , pag e 23-5 2
Horn s
Componen t Locatio n Inde x
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 .
Test , pag e 23-5 3
Test, pag e 23-5 3
SECURITY/LEF T (LOW ) HOR N
Test , pag e 23-5 2
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High Hor n Rela y Tes t
1. Remov e th e hig h hor n rela y fro m under-hoo d rela y
box A .
2. Chec k continuit y a t th e rela y terminals .
• Ther e shoul d b e continuit y betwee n th e C an d D
terminals .
• Ther e shoul d b e continuit y betwee n th e A an d B
terminal s whe n powe r an d groun d ar e connecte d
t o th e C an d D terminals .
• Ther e shoul d b e n o continuit y betwee n th e A
an d B terminal s whe n powe r i s disconnected .
Security/Low Hor n Rela y Tes t
1. Remov e th e security/lo w hor n rela y fro m under -
hoo d rela y bo x B .
2 . Chec k continuit y a t th e rela y terminals .
• Ther e shoul d b e continuit y betwee n th e C an d D
terminals .
• Ther e shoul d b e continuit y betwee n th e A an d B
terminal s whe n powe r an d groun d ar e connect -
e d to th e C an d D terminals .
• Ther e shoul d b e n o continuit y betwee n th e A
an d B terminal s whe n powe r i s disconnected .
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Security Alarm System

Control Unit Input Test

Remove the glove box, and disconnect the 22P connec-

tor and 16P connector from the control unit.

Inspect the connector and socket terminals to be sure

they are all making good contact.

• If the terminals are bent, loose, or corroded, repair

them as necessary, and recheck the system.

• If the terminals look OK, make the following input

tests at the connector.

If any test indicates a problem, find and correct the

cause, then recheck the system.

If all the input tests prove OK, the control unit

must be faulty; replace it.

• Different wires with the same color have been given a

number suffix to distinguish them (for example,

YEL/GRN1 and YEL/GRN2 are not the same).ProCarManuals.com

Security Alar m Syste m
Contro l Uni t Inpu t Tes t (cont'd )
Cavity Wir e Tes t conditio n Test : Desire d resul t Possibl e caus e if resul t i s no t obtaine d
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