wiring ACURA NSX 1997 Service Repair Manual

Troubleshooting

Tips and Precautions

Before Troubleshooting

Check applicable fuses in the appropriate fuse box.

Check the battery for damage, state of charge, and

clean and tight connections.

Check the alternator belt tension.

CAUTION:

Do not quick-charge a battery unless the battery

ground cable has been disconnected.

Otherwise you will damage the alternator

diodes.

Do not attempt to crank the engine with the bat-

tery ground cable loosely connected or you will

severely damage the wiring.

Handling Connectors

Make sure the connectors are clean and have no loose

wire terminals.

Make sure multiple cavity connectors are packed with

grease (except watertight connectors).

All connectors have push-down release type locks.

LOCKING TAB

Some connectors have a clip on their side used to at-

tach them to a mount bracket on the body or on

another component. This clip has a pull type lock.

Some mounted connectors cannot be disconnected

unless you first release the lock and remove the con-

nector from its bracket.

(21

LOCKING'

PAWL ON

OTHER

HALF OF

CONNECTOR
Pull to

disengage

BRACKET
Never try to disconnect connectors by pulling on their

wires; pull on the connector halves instead.

Always reinstall plastic covers.

Before connecting connectors, make sure the ter-

minals are in place and not bent.

BENT TERMINAL

Check for loose retainer and rubber seals.

RETAINER
RUBBER SEAL RETAINER

The backs of some connectors are packed with

grease. Add grease if needed. If the grease is con-

taminated, replace it.

(cont'd)ProCarManuals.com

Security Alar m Syste m
Wiring Connection s
"1: NSX- T (ope n top )
TRUN K KE Y
CYLINDE R SWITC H
REARWIREHARNES S
RIGH T
TAILLIGH T
ENGINECOMPARTMEN T LI D
SWITC H
DRIVER'S
DOO R KE Y
CYLINDE RSWITCH
' SECURIT Y
INDICATO R
DRIVER' S DOO R LOC K
ACTUATO R ASSEMBL Y
PASSENGER' S
DOO R KE Y
CYLINDE RSWITCH
PASSENGER' S
DOO R
LOCKACTUATO R
ASSEMBL Y
IGNITION KEYSWITC H
IGNITIO NSWITCH
UNDER-HOO D RELA Y BO X A
(HOR N RELAY )
FLOOR WIR E HARNES S
DRIVER' S DOO R
WIR E HARNES S
RIGHT REA RSIDE MARKE R
LIGH T TRUN
K LATC H
SWITC H
RETRACTABL EHEADLIGHTCONTROLUNIT
LEF TTAIL -
LIGH T
HEADLIGHT
RETRACTO RRELAYS
BATTER Y
SECURIT Y HOR N
LEF T HEADLIGH T
LEF T FRON T SID E
MARKE R LIGH T
RIGH T ROO F LOC K
SWITCH*1
PASSENGER' S
DOO R WIR E
HARNES S
SECURIT Y CONTRO L
UNIT
FRON T COMPARTMEN T
WIR E HARNES S
UNDER-HOO D FUSE/RELA Y BO X
(HEADLIGHT/TAILLIGHT /DIMMER RELAY ) LEF
T FRON T
PARKIN G
LIGH T
LEF T (LOW ) HOR N
HOO DSWITC H
FRONT COMPARTMEN TWIRE HARNES S
RIGH T FRON T SID E MARKE R
LIGH T
RIGHT HEADLIGH TRIGH
T (HIGH ) HOR N
RIGH T PARKIN G
LIGH T
LEFT REA RSIDE MARKE R LIGH TSWITCH*1
LEFTROO FLOCK
ProCarManuals.com

Supplemental Restrain t Syste m (SRS )
Components/Wirin g Location s
CAUTION: Mak e sur e al l SR S groun d location s ar e clea n an d ground s ar e securel y attached .
NOTE:
• Al l SR S electrica l wirin g harnes s ar e covere d wit h yello w insulation .
• Replac e th e entir e affecte d SR S harnes s assembl y i f i t ha s a n ope n cirui t o r damage d wiring .
SRS INDICATO R LIGH T (I n th e gaug e assembly ) T O CRUIS E CONTRO L
Troubleshooting , pag e 24-1 3 SET/RESUME SWITC H
Gaug e assembly , Sectio n 23 . CABL E REE L t o
DRIVER' S AIRBA G
3P Connecto r
TO HOR N SWITC H
DRIVER' S AIRBA G ASSEMBL Y
(Airba g an d Inflator )
Removal/Installation ,page 24-34/24-3 5Disposal, pag e 24-3 7
CABL E REE L t oSR S MAI N HARNES S6P Connecto r
LEFT DAS H SENSO RRemoval/Installation ,page 24-47/24-4 8
CABLE REE LRemoval/Installation ,page 24-42/24-4 4
PASSENGER' S AIRBA G ASSEMBL Y
(Airba g an d inflator )
Removal/Installation ,
pag e 24-34/24-3 5
Disposal , pag e 24-3 7
SRS MAI N HARNES S toPASSENGER' S AIRBA G
3 P Connecto r
RIGH T DAS H SENSO R
Removal/Installation ,
page 24-47/24-4 8
SRS MAI N HARNES S
t o RIGH T DAS H SENSO R
2 P Connecto r
SRS MAI N HARNES SSRS MAI N HARNES S t o FLOO R WIR E HARNES S
4 P Connecto r
UNDER-DAS H
FUS E BO X
SR S MAI N HARNES S
to UNDER-DAS HFUSE BO X
2 P Connecto r
LEF T DAS H SENSO R
t o SR S MAI N HARNES S
2 P Connecto r
SRS UNI T(Includin g safin g sensor )Removal/Installation ,
pag e 24-49/24-5 2 PASSENGER'
S SEA T BEL T
TENSIONE R
Removal/Installation ,
pag e 24-51/24-5 2
Disposal , pag e 24-3 7
PASSENGER' S SEA T BEL T
TENSIONE R t o
FLOO R WIR E HARNES S
3 P Connecto r
FLOO R WIR E
HARNES S
DRIVER' S SEA T BEL T
TENSIONE R
Removal/Installation ,page 24-51/24-5 2Disposal, pag e 24-3 7
TEST HARNES SSOCKET16P Connecto r
SRS MAI NHARNES S SOCKE T
18 P Connecto r
SR
S MAI N HARNES S
t o FLOO R WIR E HARNES S
3 P Connecto r DRIVER'
S SEA T BEL T
TENSIONE R t o
FLOO R WIR E HARNES S
3 P Connecto r
FLOO
R WIR E
HARNES S
FLOOR WIR E HARNES S
t o INDICATO R LIGH T i n
GAUGE ASSEMBL Y
30P Connecto r
ProCarManuals.com

Sensor Inspection

CAUTION: Take extra care when painting or doing

body work on any part of the dashboard lower panel.

Avoid direct exposure of the sensors or wiring to heat

guns, welding, or spraying equipment.

• Disconnect both the negative and positive battery

cables.

• Install the short connectors before working around

the dashboard lower panel or the SRS sensors.

• After any degree of frontal body damage, inspect

both dash sensors. Replace a sensor if it is dented,

cracked, or deformed.

• Be sure the sensors are installed securely.

BRACKET
DASHBOARD

LOWER PANEL

MOUNTING

BOLTS
Wiring Precautions

Never attempt to modify, splice or repair SRS wiring.

NOTE: SRS wiring can be identified by special

yellow outer protective covering.

• Be sure to install the harness wires so that they are

not pinched or interfering with other car parts.

• Make sure all SRS ground locations are clean and

grounds are securely fastened for optimum metal-

to-metal contact. Poor grounding can cause inter-

mittent problems that are difficult to diagnose.

DASH

SENSORProCarManuals.com

Troubleshooting
Self-diagnosis Functio n
The SR S uni t include s a self-diagnosi s function . I f ther e
i s a failur e in th e sensors , SR S unit , inflator , o r thei r cir -
cuits , th e SR S indicato r ligh t i n th e gaug e assembl y
goe s ON .
SRS INDICATO R LIGH T
As a syste m check , th e SR S indicato r ligh t als o come s
o n whe n th e ignitio n i s firs t turne d t o th e I I position . I f
th e ligh t goe s of f afte r approximatel y si x seconds , th e
syste m is OK .
I f th e SR S indicato r ligh t remain s o n (o r fail s t o com e o n
th e syste m chec k mode ) on e o f th e SR S component s
(o r th e wiring/connector s in-between ) i s faulty .
Troubleshootin g Precaution s
Always us e th e tes t harness . D o no t us e tes t
probe s directl y o n componen t connecto r ter -
minal s o r wires ; yo u ma y damag e the m o r th e
contro l unit .
Whe n connectin g an y o f th e tes t harnesse s t o
th e system , pus h th e connector s straight-in ; d o
no t ben d th e connecto r terminals .
Befor e disconnectin g th e airba g connector(s) ,
tur n of f th e ignitio n switc h an d wai t fo r a t leas t
thre e minute s t o le t th e capacito r i n th e back-u p
circui t discharge . Thi s wil l preven t a malfunctio n
o f th e sea t bel t tensioners .
Befor e disconnectin g an y par t o f th e SR S wir e
harness , instal l th e shor t connecto r (RED ) o n th e
airbag s an d bot h sea t bel t tensioners . Afte r in -
stallin g th e shor t connector s o n th e airbags ,
immediatel y instal l on e SR S Servic e Connecto r
(Too l Numbe r 07MAZ-SP0020A ) o n th e cabl e
ree l connecto r (fo r th e driver' s airbag) , an d
anothe r o n th e SR S mai n harnes s connecto r (fo r
th e passenger' s airbag) . Thi s wil l preven t an y
stati c electricit y fro m triggerin g th e sea t bel t
tensioner s befor e yo u disconnec t the m (se e pag e
24-10 ).
SR S Indicato r Ligh t Troubleshootin g
Possible conditions :
1. SR S indicato r ligh t doe s no t com e o n a t al l — se e
pag e 24-15 .
2 . SR S indicato r ligh t stay s o n constantl y — se e pag e
24-18 .
3 . SR S indicato r ligh t come s o n in combinatio n wit h a
failur e o f anothe r electrica l syste m (brak e syste m
light , malfunctio n indicato r lam p etc.) . Chec k fo r
damage/corrosio n a t th e under-das h fus e box .
NOTE :
Before startin g th e applicabl e troubleshooting ,
chec k th e conditio n o f al l SR S connector s an d
groun d points .
I f th e faul t i s no t foun d afte r completin g th e ap -
plicabl e troubleshooting , substitut e a known -
goo d SR S uni t an d chec k whethe r th e SR S in -
dicato r ligh t goe s off . I f i t does , th e origina l SR S
uni t mus t b e faulty ; replac e it .
ProCarManuals.com

Airbag Assembly Installation

CAUTION:

• Be sure to install the SRS wiring so that it is not pin-

ched or interfering with other car parts.

• Be sure the battery cables are disconnected.

• After completing repair work, be sure to remove the

short connectors (RED) and reconnect all the con-

nectors.

Driver's Airbag:

1. Place the driver's airbag assembly in the steering

wheel, and secure it with new Torx bolts.

TORX BOLT

9.8 N-m (1.0 kgf-m,

7.2 Ibf-ft) Replace.

Use a Torx T30 bit

TORX BOLT

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.

Use a Torx T30 bit
DRIVER'S

AIRBAG ASSEMBLY
Passenger's Airbag:

2. Place the passenger's airbag assembly in the

dashboard.

3. Press the airbag assembly downwards, and turn the

adjusting nut until it touches the lower part of the

airbag assembly. Then, turn it back half a turn so

that there is a small gap between adjusting nut and

the airbag assembly.

4. Install the bracket and mounting nuts.

5. Tighten the three airbag mounting nuts, then

tighten the two mounting nuts on the bracket.

PASSENGER'S

AIRBAG

ASSEMBLY

ADJUSTING

NUT

BRACKET
ADJUSTING

NUT

PASSENGER'S

AIRBAG

ASSEMBLY

AIRBAG ASSEMBLY

MOUNTING NUTS

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.
BRACKET

MOUNTING

NUTS

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.ProCarManuals.com

Dash Senso r Remova l
CAUTION :
D o no t damag e th e senso r wiring .
D o no t instal l use d SR S part s fro m anothe r car ,
Whe n repairin g a n SRS , us e onl y ne w parts .
Carefull y inspec t th e das h sensor s fo r sign s o f bein g
droppe d o r improperl y handled , suc h a s dents ,
crack s o r deformation .
1 . Disconnec t th e batter y negativ e cable , the n th e
positiv e cable .
2 . Befor e disconnectin g an y par t o f th e SR S wir e
harness , instal l th e shor t connector s (RED ) (se e pag e
24-10 ).
3 . Remov e th e dashboar d lowe r cover .
4. Pul l bac k th e carpeting , an d disconnec t th e 2 P con -
necto r betwee n th e das h senso r an d SR S mai n
harness .
DASH SENSO R (L )
SR S MAI N HARNES S2P CONNECTO R
5. Remov e th e tw o das h senso r mountin g bolt s fro m
th e senso r bracket , the n remov e th e das h sensor .
SENSOR BRACKE T
DASH SENSO RMOUNTIN G BOLT S
ProCarManuals.com

Supplemental Restraint System (SRS)

SRS Unit Assembly Installation

CAUTION: Be sure to install the SRS wiring so that it is

not pinched or interfering with other car parts.

1. Install the SRS unit.

TORX BOLTS 6 mm

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.

Use a Torx T30 bit

TORX BOLTS 6 mm

9.8 N-m (1.0 kgf-m, 7.2 Ibf-ft)

Replace.

Use a Torx T30 bit

2. Clip the SRS main harness into the harness holder,

then connect the SRS main harness 18P connec-

tor to the SRS unit; push it into position until it

clicks.

3. Install the carpet.
4. Remove the short connectors (RED) from the pas-

senger's airbag, and remove the SRS Service

Connector from the SRS main harness.

5. Reconnect the passenger's airbag 3P connector to

the SRS main harness 3P connector, then reinstall

the glove box.

6. Remove the short connector (RED) from the driver's

airbag, and remove the SRS Service Connector

from the cable reel.

7. Reconnect the driver's airbag 3P connector to the

cable reel 3P connector. Attach the short connec-

tor (RED) to the access panel, then reinstall the

panel on the steering wheel.

8. Remove the short connectors (RED) from both seat

belt tensioners, then attach the short connectors

(RED) to their holders.

9. Reconnect the floor wire harness 3P connectors to

the driver's and passenger's belt tensioners.

10. Reconnect the battery positive cable, then the

negative cable.

11. After installing the SRS unit, confirm proper system

operation:

Turn the ignition switch ON (II); the SRS indicator

light should come on for about six seconds and

then go off.ProCarManuals.com