ACURA NSX 1997 Service Repair Manual

Back-up Light s
Test
Manua l Transmission :
1. I f onl y on e back-u p ligh t doe s no t g o on , chec k tha t
bul b i n th e taillight .
2. I f neithe r back-u p ligh t goe s on , chec k th e No . 5(1 5
A) fus e i n th e under-das h fus e box .
3 . I f th e fus e an d bulb s ar e OK , disconnec t th e connec -
to r fro m th e back-u p ligh t switc h o n th e transmis -
sion housing .
This washe r mus talway s b e replace dfor th e switc h t ofunctio n properl yand t o preven t oi lleaks .
BACK-U PLIGHT SWITC H25 N- m (2. 5 kgf-m , 1 8 Ibf-ft )
B(GRN/BLK )
A(YEL )
TRANSMISSIO N HOUSIN G
4. Chec k fo r continuit y betwee n th e A (YEL ) an d B
(GRN/BLK ) wire s wit h th e switc h installed . Ther e
shoul d b e continuit y wit h th e shif t leve r i n reverse .
I f ther e i s n o continuity , replac e th e switch .
I f ther e i s continuity , bu t th e back-u p light s d o no t
g o on , chec k for :
— Poo r groun d (G551) .
- A n ope n i n th e YE L o r GRN/BL K wire . Automati
c Transmission :
1 . I f onl y on e back-u p ligh t doe s no t g o on , chec k tha t
bulb i n th e taillight .
2. I f neithe r back-u p ligh t goe s on , chec k th e No . 5(1 5
A) fus e i n th e under-das h fus e box .
3 . I f th e fus e an d bulb s ar e OK , disconnec t th e 12 P con -
necto r fro m th e A/ T gea r positio n switc h (back-u p
light switch) .
View fro mwire sid e
A/T GEA R POSITIO NSWITCH
4. Chec k fo r continuit y betwee n th e No . 9 an d No . 1 0
terminals . Mov e th e leve r bac k an d fort h a t th e
positio n withou t touchin g th e pus h button , an d
chec k fo r continuit y withi n th e rang e o f fre e play .
I f ther e i s n o continuit y withi n th e rang e o f fre e
play, adjus t th e positio n o f th e A/ T gea r positio n
switc h (se e pag e 23-162 ).
I f ther e i s continuity , bu t th e back-u p light s d o no t
g o on , chec k for :
— Poo r groun d (G551) .
- A n ope n i n th e YE L o r GRN/BL K wire .
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Brake Light s
Componen t Locatio n Inde x
BRAK E SWITC HTest, pag e 23-21 3
HIGH MOUN T BRAK E LIGH T (LED )
• LE D Replacement , pag e 23-21 4
• Replacement , pag e 23-21 4
• Test , pag e 23-21 3
RIGH T TAILLIGH T
• Bul b Replacement , pag e 23-19 8• Failur e Senso r Test , pag e 23-15 5
LEF T TAILLIGH T
• Bul b Replacement , pag e 23-19 8
• Failur e Senso r Test , pag e 23-15 5
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Brake Switc h Tes t
1. I f on e o f th e brak e light s doe s no t g o on , chec k tha t
brak e ligh t bul b in th e tailligh t o r th e hig h moun t light .
2. I f non e o f th e brak e light s g o on , chec k th e No . 4 5
(2 0 A ) fus e i n th e under-hoo d fuse/rela y box .
3 . I f th e fus e an d bulb s ar e OK , disconnec t th e 4 P con -
necto r fro m th e brak e switch .
4P CONNECTO R
BRAKESWITtH
BRAK EPEDAL
4. Chec k fo r continuit y betwee n th e B an d C terminals .
Ther e shoul d b e continuit y wit h th e brak e peda l
pushed .
I f ther e i s n o continuity , replac e th e switc h o r ad -
jus t peda l heigh t (se e sectio n 19 ).
I f ther e i s continuity , bu t th e brak e light s d o no t
g o on , inspec t for :
— Poo r groun d (G401 , G402 , G403 , G551) .
— An ope n in th e WHT/GR N o r GRN/WH T wire .
— Fault y brak e ligh t failur e sensor s (se e pag e
23-155 ).
Hig h Moun t Brak e Ligh t Tes t
1. Ope n th e trun k li d an d engin e compartmen t lid .
2 . Disconnec t th e 2 P connecto r fro m th e trun k wir e
harness .
TRUNK WIR E HARNES S
SID E WIR E
HARNES S
View fro m termina l sid e Vie
w fro m
termina lside
3. Connec t a voltmete r positiv e lea d t o th e GRN/WH T
termina l an d th e negativ e lea d t o th e BL K termina l
o f th e sid e wir e harnes s sid e o f th e connector .
Pus h th e brak e pedal , an d chec k fo r voltag e betwee n
th e GRN/WH T an d th e BL K terminals . Ther e shoul d
b e batter y voltage .
I f ther e i s n o voltage , chec k for :
— Blow n No . 4 5 (2 0 A ) fus e i n th e under-hoo d
fuse/rela y box .
— A n ope n i n th e GRN/WH T o r BL K wire .
— Fault y brak e switch .
I f ther e i s batter y voltage , g o t o ste p 4 .
4 . Connec t batter y powe r t o th e GRN/WH T termina l
an d groun d t o th e BL K termina l o f th e trun k wir e
harnes s sid e o f th e connector .
Chec k tha t al l th e LED s o f th e hig h moun t brak e ligh t
go on .
If th e hig h moun t brak e ligh t doe s no t g o on ,
chec k fo r a n ope n i n th e wire s i n th e trun k lid .
I f th e wire s i n th e trun k li d ar e OK , replac e th e
hig h moun t brak e light .
I f som e o f th e LED s d o no t g o on , replac e th e hig h
moun t brak e ligh t assembly .
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Brake Lights

High Mount Brake Light Replacement

CAUTION: Be careful not to damage the high mount

brake light, rear spoiler, and trunk lid.

1. Open the trunk lid.

2. Remove the caps and five screws from the rear

spoiler.

REAR

SPOILER

SCREW

CAP

3. Carefully pall the high mount brake light out of the

rear spoiler, then disconnect the 2P connector from

the high mount brake light.

REAR SPOILER

2P CONNECTOR

HIGH MOUNT BRAKE LIGHT

(LED)
Rear Spoiler Replacement

CAUTION: Be careful not to damage the high mount

brake light, rear spoiler, and trunk lid.

1. Open the trunk lid.

2. Remove the six mounting nuts.

REAR

SPOILER

3. Carefully lift the rear spoiler assembly off the rear

trunk lid.

REAR SPOILER

2P CONNECTOR (Trunk sub-harness side)

4. Disconnect the 2P connector from the trunk sub-

harness.ProCarManuals.com

Side Marker/Tur n Signal/Hazar d Flashe r Syste m
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 in th e SR S
sectio n 24 befor e performin g repair s o r service .
HEADLIGH T SWITC H
Test , pag e 23-18 3
Replacement , pag e 23-18 4
TUR N SIGNAL/HAZAR D RELA Y
Inpu t Test , pag e 23-22 0
UNDER-DAS H FUS E BO X TUR
N SIGNA L INDICATO R LIGHT S
(I n th e gaug e assembly )
Bul b Location , pag e 23-12 8 HAZAR
D WARNIN G SWITC H
Removal , pag e 23-22 2
Test , pag e 23-22 3
• TUR N SIGNA L SWITC H
Test , pag e 23-18 3
Replacement , pag e 23-18 4
• TUR N SIGNA L CANCE L UNI T
Inpu t Test , pag e 23-22 1
SID E MARKE R FLASHE R CIRCUI T
(I n th e integrate d contro l unit )
Inpu t Test , pag e 23-17 0
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Side Marker/Turn Signal/Hazard Flasher System

Description

To cope with dimensional requirements for the airbag components and to offer better operational feel, the turn signal

lever and the cancel mechanism are separated mechanically, and connected electrically instead.

The system cancels the turn signals electrically, by means of a solenoid, after a turn is made. A sensor mechanism which

consists of cancel cams on the steering shaft and a pair of switches, is used to monitor the steering shaft's position.

STEERING SHAFT

CANCEL CAM

CANCEL SWITCH

TURN SIGNAL LEVER

SOLENOIDProCarManuals.com

A cam plate is installed around the steering shaft. A pair of switches (A and B) are installed beside it.

When the steering is turned in direction of the arrow, switch A turns on first.

Then switch B turns on.

The cancel unit monitors the on-off sequence of both switches. Once it receives a full set of signals for a right or left

turn, it energizes the solenoid which then moves the turn signal lever back to neutral.

RIGHT TURN SIGNAL

LEFT TURN SIGNAL
Cancel unit

energizes solenoid

A
I

Cancel unit

energizes solenoidProCarManuals.com

Side Marker/Turn Signal/Hazard Flasher System

Turn Signal/Hazard Relay Input Test

1. Remove the dashboard lower cover. Remove the

turn signal/hazard relay from the left kick panel,

then disconnect the 6P connector.

2. 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 cor-

rect the cause, then recheck the system.

— If all the input tests prove OK, the control unit

must be faulty; replace it.
TURN/SIGNAL

HAZARD RELAY

View from

wire side

Terminal
Test condition
Test: Desired result

Possible cause if result is not obtained

E

(BLK)
Under all conditions
Check for continuity to ground:

There should be continuity.
• Poor ground (G401, G402, G403)

• An open in the wire

B

(RED/WHT)
Under all conditions
Check for voltage to ground:

There should be battery voltage.
• Blown No. 46 (10 A) fuse

• An open in the wire

SR

(BLU/YEL)
Ignition switch ON (II)

and turn signal switch in

right position
Check for voltage to ground:

There should be battery voltage.

SL

(BLU/GRN)
Ignition switch ON and

turn signal switch in left

position
• Blown No. 5 (15 A) fuse

• Faulty turn signal switch or cancel

unit

• An open in the wire

SR

(BLU/YEL)
Hazard warning switch

ON
Check for voltage to ground:

There should be battery voltage.

SL

(BLU/GRN)

LR

(GRN/YEL)
Connect the B terminal

to the LR terminal.
The right turn signal lights should

come on.
• Blown bulb

• Faulty side marker flasher circuit

• Poor ground (G301, G401, G402,

G403, G551)

• An open in the wire

LL

(GRN/BLU)
Connect the B terminal

to the LL terminal.
The left turn signal lights should

come on.
• Blown bulb

• Faulty side marker flasher circuit

• Poor ground (G301, G401, G402,

G403, G551)

• An open in the wire
• Faulty hazard warning switch

• An open in the wireProCarManuals.com

Cancel Unit Input Test

1. Remove the steering column covers. Disconnect the

10P connector from the turn signal cancel unit.

2. Inspect the connector 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.
10P CONNECTOR
TURN SIGNAL

CANCEL UNIT

Terminal
Test condition
Test: Desired result
Possible cause if result is not obtained

C10

(BLK)
Under all conditions
Check for continuity to ground:

There should be continuity.
• Poor ground (G401, G402, G403)

• An open in the wire

C1

(GRY/RED)
Ignition switch on (II)
Check for voltage to ground:

There should be battery voltage.
• Blown No. 5 (15 A) fuse

• An open in the wire

C5

(PUR)
Headlight switch
Check for voltage to ground:

There should be approx. 5 volt.
• Faulty headlight switch or taillight

relay

• An open in the wire

C2

(BRN)
Turn signal switch in

right position

C6

(GRY)
Check for continuity between the C2

and C6 terminals:

There should be continuity.
• Faulty turn signal switch

• An open in the wire

C2

(BRN)
Turn signal switch in left

position

C9

(GRN/BLK)
Check for continuity between the C2

and C9 terminals:

There should be continuity.
• Faulty turn signal switch

• An open in the wire

C3

(ORN)
Under all conditions

C4

(WHT)
Check for continuity between the C3

and C4 terminals:

There should be continuity.
• Faulty cancel solenoid

• An open in the wire

C7

(BLU/YEL)
Connect the C1 terminal

to the C7 terminal, then

turn the ignition switch

ON
(II).
The right turn signal lights should

come on.
• Blown bulb

• Faulty turn signal/hazard relay

• Poor ground (G301, G401, G402,

G403, G551)

• An open in the wire

C8

(BLU/GRN)
Connect the C1 terminal

to the C8 terminal, then

turn the ignition switch

ON
(II).
The left turn signal lights should

come on.
• Blown bulb

• Faulty turn signal/hazard relay

• Poor ground (G301, G401, G402,

G403, G551)

• An open in the wireProCarManuals.com

Side Marker/Tur n Signal/Hazar d Flashe r Syste m
Hazard Warnin g Switc h Replacemen t
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 .
1 . Remov e th e dashboar d lowe r cover , an d disconnec t
th e connectors .
2 . Remov e th e dashboar d lowe r pad .
DASHBOAR D LOWE RCOVER
3. Remov e th e til t cover .
DASHBOAR D LOWE RPAD
TIL T COVE R
4. Remov e th e steerin g colum n covers .
NOTE : 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. Disconnec t th e 20P , 4P , an d 5 P connectors .
CAUTION : B e carefu l no t t o damag e th e SR S wir e
harness .
6. Remov e th e si x screws , the n remov e th e hazar d
warning-wipe r switc h assembly .
5P CONNECTO R
HAZARDWARNIN G
SWITC H
20 P CONNECTO R
4 P CONNECTO R
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