headlights ACURA NSX 1997 Service Repair Manual

Headlights
Adjustmen t
Before adjustin g th e headlights :
• Par k th e vehicl e o n a leve l surface .
• Mak e sur e th e tir e pressure s ar e correct .
• Th e drive r o r someon e wh o weight s th e sam e shoul d
si t i n th e driver' s seat .
1 . Clea n th e oute r len s s o tha t yo u ca n se e th e cente r
o f th e headlights . 4
. Tur n th e lo w beam s on .
5 . Determin e i f th e headlight s ar e aime d properly .
Vertica l adjustment :
Measur e th e heigh t o f th e headlight s (A) . Th e light s
shoul d reflec t 5 2 m m (2. 1 in. ) belo w th e head-ligh t
height. (B)
6. I f necessary , adjus t th e headlight s t o loca l require -
ment s b y turnin g th e horizonta l adjuste r an d th e
vertica l adjuster .
2 . Par k th e vehicl e wit h th e headlight s 7. 5 m (2 5 ft )
awa y fro m a wal l o r a screen .
3 . Ope n th e hood .
ProCarManuals.com

3-15
T
ITEMMETRICENGLISH
ELECTRICALBattery
Starter
Alternator
Fuses
In the under-dash fuse box
In the under-hood fuse/relay box
In the engine compartment
fuse/relay box
Headlights, high, low
Front turn signal lights
Front parking lights
Rear turn signal lights
Brake/Taillights
Taillights
Front side marker lights
Rear side marker lights
Back-up lights
License plate lights
Gauge lights
Indicator lights
Glove box and fuse lights
Ceiling lights
Trunk lights
Door courtesy lights
Footwell light
Illumination and indicator lights
High mount brake light12 V – 52AH/5HR
12 V – 55AH/5HR
12 V – 1.4 kW
12 V – 120 A
7.5 A, 10 A, 15 A
7.5 A, 10 A, 15 A, 20 A, 30 A, 40 A, 50 A
10 A, 20 A, 30 A, 40 A, 120 A
12 V – 65 W/35 W (HID)
12 V – 45 CP
12 V – 5 W
12 V – 45 CP
12 V – 32/2 CP
12 V – 2 CP
12 V – 3 CP
12 V – 3 CP
12 V – 32 CP
12 V – 8 W
12 V – 3.0 W, 1.4 W
12 V – 1.4 W, 1.96 W
12 V – 3.4 W
12 V – 8 W
12 V – 3.4 W
12 V – 3.4 W
12 V – 5 W
12 V – 1.4 W, 0.84 W
12 V – 0.91 W, LED
LED
TIRE
M/T
A/T
BRAKE SYSTEM
Front: 215/40 R17 83Y Rear: 255/40 R17 94Y165/80 D 16 (Folding spare tire)
Power assisted self-adjusting
ventilated disc
58.0/38.8 cm
28.99/6.01 sq in
Mechanical expanding, rear two wheel
brakes
WHEEL
ALIGNMENTCamber Front
Rear
Caster
Toe Front
Rear–0 °20 ’
–1 °30 ’
8 °
Out 3.5 mm Out 0.14 in
In 4.0 mm In 3/16 in
NOTES
Size
Type, front and rear
Pad and lining surface area: front/rear
Parking brake type
*04-NSX (61SW004)SEC03(01-16) 9/22/04 1:49 PM Page 3-15
ProCarManuals.com

Idle Spee d Settin g
Inspection/Adjustmen t
NOTE : Befor e settin g th e idl e speed , chec k th e thes e
items :
Th e MI L ha s no t bee n reporte d on .
Ignitio n timin g
Spark plug s
Air cleane r
PCV syste m
1 . Star t th e engine . Hol d th e engin e a t 3,00 0 rp m wit h
no loa d (A/ T in o r position , M/ T in neutral ) unti l
th e radiato r fa n come s on , the n tur n th e ignitio n
switch OFF .
2. Connec t th e SC S servic e connecto r t o servic e chec k
connector .
3. Connec t a OBDI I sca n too l (se e pag e 11-38 ) o r
tachometer .
Connec t a tachomete r t o loo p o f ignite r uni t sec -
ondary , or.. .
TACHOMETE R
TACHOMETE R
CONNECTOR
4. Restar t th e engine .
5 . Chec k idlin g i n no-loa d condition s i n whic h th e
headlights , blowe r fan , rea r defogger , coolin g fan ,
an d ai r conditione r ar e no t operating . D o no t
depres s th e accelerato r pedal .
Idl e spee d shoul d be :
Adjus t th e idl e speed , i f necessary , b y turnin g th e
idl e adjustin g screw . Afte r adjustin g th e idl e speed ,
chec k th e ignitio n timin g (se e sectio n 23 ). I f i t i s ou t
o f spec , g o bac k t o ste p 4 .
IDL E ADJUSTIN GSCREW
6. Disconnec t th e SC S servic e connector .
7 . Depres s th e accelerato r peda l an d stabiliz e th e
engin e spee d a t 1,00 0 rpm , the n slowl y releas e th e
peda l unti l th e engin e idles , the n chec k th e idl e
speed .
Idle spee d shoul d be :
Remov e th e rubbe r ca p fro m th e tachomete r
connecto r an d connec t a tachometer .
ProCarManuals.com

Emission Contro l Syste m
System Descriptio n
The emissio n contro l syste m include s tw o Thre e Wa y
Catalyti c Converter s (TWCs) , Exhaus t Ga s Recirculatio n
(EGR ) system , Positiv e Crankcas e Ventilatio n (PCV ) sys -
te m an d Evaporativ e Emissio n (EVAP ) Contro l system .
Th e emissio n contro l syste m is designe d t o mee t federa l
an d stat e emissio n standards .
Tailpipe Emissio n
1. Star t th e engine . Hol d th e engine at 3,00 0 rp m wit h
no loa d (A/ T in o r position , M/ T in neutral ) unti l
th e radiato r fa n come s on , the n le t i t idle .
2 . Connec t a tachometer .
3 . Chec k an d adjus t th e idl e speed , i f necessar y (se e
pag e 11-129 ).
4 . War m u p an d calibrat e th e C O mete r accordin g t o
th e mete r manufacturer' s instructions .
5 . Chec k idl e C O wit h th e headlights , heate r blower ,
rea r windo w defogger , coolin g fan , an d ai r condi -
tione r off .
NOTE : (Canada ) Pul l th e parkin g brak e leve r up .
Star t th e engine , the n chec k tha t th e headlight s ar e
off.
CO mete r shoul d indicat e 0.1 % maximum .
Inspection
any ope n flam e awa y fro m you r wor k area .
D
o no t smok e durin g thi s procedure . Kee p
ProCarManuals.com

Lighting System

Retractable Headlight Control Unit Input Test

Remove the rear bulkhead panels, and disconnect the

18P 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.
BLU/RED

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

BLK1

BLK2

RED/GRN2

WHT/GRN

YEL/WHT

PNK/BLK

RED/YEL'

RED/GRN1
Under all conditions

Headlight switch OFF and

retractor switch OFF

Retractor switch OFF

Retractor switch ON

Headlight switch

(headlights on)

Headlight switch

(headlights on)
Check for continuity to ground:

There should be continuity.

Check for voltage to ground:

There should be battery

voltage.

Check for voltage to ground:

There should be battery

voltage.

Check for voltage to ground:

There should be battery

voltage.

Check for voltage to ground:

There should be battery

voltage.

Check for voltage to ground:

There should be battery

voltage.
• Poor ground (G401, G402, G403)

• An open in the wire

• Poor ground (G401, G402, G403)

• An open in the wire

• Blown No. 42 (15 A) and No. 43 (15 A)

fuses

• Faulty retractor switch or headlight

switch

• An open in the wire

• Blown No. 42 (15 A) and No. 43 (15 A)

fuses

• Faulty retractor switch

• An open in the wire

• Blown No. 42 (15 A) and No. 43 (15 A)

fuses

• Faulty retractor switch

• An open in the wire

• Blown No. 43 (15 A) fuse

• Faulty headlight switch

• An open in the wire

• Blown No. 52 (20 A) fuse

• Faulty headlight relay or headlight

switch

• An open in the wire

• Blown No. 49 (20 A) fuse

• Faulty headlight relay or headlight

switch

• An open in the wire
NOTE: Different wires with the same color have

been given a number suffix to distinguish them

(for example, RED/YEL1 and RED/YEL4 are not the

same).ProCarManuals.com

Wire
Test condition

Test: Desired result
Possible cause if result is not obtained

LT
GRN/

RED
Passing switch ON
Check for voltage to ground:

There should be battery voltage.
• Faulty headlight relay or passing

switch

• An open in the wire

BLU/RED
Retractor motor stationary
Check for voltage to ground:

There should be battery volt-

age.
• Blown No. 42 (15 A) fuse

• Faulty right retractor relay

• An open in the wire

BLU1
• Blown No. 43 (15 A) fuse

• Faulty left retractor relay

• An open in the wire

Under all conditions

YEL
Check for continuity to ground:

There should be continuity.
• Faulty right retractor cut relay

• Poor ground (G202)

• An open in the wire

YEL/GRN
• Faulty left retractor cut relay

• Poor ground (G202)

• An open in the wire

Ignition switch ON

RED/YEL4
Connect battery power:

The retractable headlight mal-

function indicator should come

on.
• Faulty safety indicator circuit

• An open in the wire

Headlight retractor switch

OFF (retractable headlight

closed)

Connect an ohmmeter with

the negative lead to the

WHT/YEL terminal, and the

positive lead to the

GRN/WHT (orYEL/BLU)

terminal.
Check that there is no continuity

between the WHT/YEL and the

GRN/WHT (or YEL/BLU) termi-

nals.
• Faulty headlight retractor motor

Raise the headlights halfway

by turning the retractor knob

clockwise.
Check for continuity between the

WHT/YEL and the GRN/WHT1 (or

YEL/BLU) terminals: There

should be continuity.
• Faulty headlight retractor motor

• An open in the wire

Turn the retractor knob

clockwise until the head-

lights are fully raised.
Check for continuity between the

WHT/YEL and the GRN/WHT1 (or

YEL/BLU) terminals: There

should be continuity.
• Faulty headlight retractor motor

• An open in the wire

Headlight retractor switch

OFF (retractable headlight

closed)

Connect an ohmmeter nega-

tive lead to the YEL/WHT

terminal, and the positive

lead to the GRN/WHT' (or

YEL/BLU) terminal.
Check for continuity between

the YEL/WHT and the GRN/

WHT1 (or YEL/BLU) terminals:

There should be continuity.
• Faulty headlight retractor motor

• An open in the wire

Raise the headlights halfway

by turning the retractor knob

clockwise.
Check for continuity between the

YEL/WHT and the GRN/WHT1 (or

YEL/BLU) terminals: There

should be continuity.
• Faulty headlight retractor motor

• An open in the wire

Turn the retractor knob

clockwise until the head-

lights are fully raised.
Check that there is no continuity

between the YEL/WHT and the

GRN/WHT1 (or YEL/BLU) termi-

nals.
• Faulty headlight retractor motor
GRN/WHT1

(YEL/BLU)
WHT/YEL

GRN/WHT1

(YEL/BLU)
YEL/WHTProCarManuals.com

Lighting System

Retractor Motor Replacement

CAUTION:

Halogen headlights can become very hot in use; do

not touch them or the attaching hardware immediately

after they have been turned off.

Do not try to replace or clean headlights with the lights

1. Remove the No. 42 (15 A) and No. 43 (15 A) fuses

from the under-hood fuse/relay box.

No. 43
(15A)

FUSE

No. 42
(15A)

FUSE

UNDER-HOOD FUSE/RELAY BOX

2. Turn the knob clockwise to raise the headlight.

CAP
3. Remove the two caps, four screws, and cowl clips.

COWL CLIP

CAP

4. Slide the headlight housing forward and up.

NOTE: Be careful not to damage the front bumper

or the headlight housing.

HEADLIGHT HOUSING

PROTECTIVE TAPE

5. Disconnect the 6P connector from the headlight

unit.

6P CONNECTOR
MOUNTING

BOLTS

HEADLIGHT UNIT

6. Remove the four mounting bolts, then remove the

unit.
KNOB
SCREWProCarManuals.com

Headlights

Description

The light first forms basic pattern A after being inter-

rupted by the interrupter plate and passing through the

convex lens. The interrupter plate determines the form.

The outer lens distributes the light into pattern B.

CONVEX LENS

INTERRUPTER PLATE

BULB

REFLECTOR

OUTER LENSProCarManuals.com

Headlights

Adjustment

Adjust the headlights to local requirements by turning the adjusters as shown.

NOTE: Be careful not to damage the front fender or the

headlight housing when adjusting.

HEADLIGHT HORIZONTAL

AIM ADJUSTER

HEADLIGHT VERTICAL

AIM ADJUSTER
PROTECTIVE TAPEProCarManuals.com

Headlights

Bulb Replacement

CAUTION:

Halogen headlights can become very hot in use; do

not touch them or the attaching hardware immediately

after they have been turned off.

Do not try to replace or clean the headlights with the

lights on.

1. Remove the bulb cap.

BULB

(HI:
65
W/LO:
55 W)

BULB CAP

2P CONNECTOR

2. Disconnect the 2P connector, then remove the

retaining spring and bulb.
Daytime Running Lights

(Canada)

Replacement

1. Remove the bolt, and pull out the daytime running

light, then disconnect the 2P connector.

2P

CONNECTOR

DAYTIME RUNNING LIGHT

BOLT

2. If necessary, replace the bulb.

DAYTIME RUNNING

LIGHT

BULB (32CP)

SOCKETProCarManuals.com