1997 ACURA NSX lights

Integrated Control Unit

Input Test (cont'd)

Lights-on Reminder System:

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

A8

A9

A5

GRN/BLU2

A6

ORN
Under all conditions

Under all conditions

Ignition switch ON (II)

Driver's door open

Headlight switch ON

Connect the A9 terminal

to the ORN terminal
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 1 V or less.

Check for voltage to ground:

There should be battery voltage.

Check chime operation:

Chime should activate each time the

battery is connected.
• Poor ground (G401, G402, G403)

• An open in the wire

• Blown No. 34 (15 A) fuse

• An open in the wire

• Blown No. 5(15 A) fuse

• An open in the wire

• Faulty driver's door switch

• Poor ground (G401, G402, G403)

• An open in the wire

• Blown No. 38(15 A) fuse

• Faulty headlight switch

• Faulty taillight relay

• An open in the wire

• Faulty chime

• Poor ground (G401, G402, G403)

• An open in the wire

Seat Belt Reminder System:

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

A8

A9

A5

A13
Under all conditions

Under all conditions

Ignition switch ON (II)

Ignition switch ON (II)

and driver's seat belt

not buckled
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 1 V or less.
• Poor ground (G401, G402, G403)

• An open in the wire

• Blown No. 34 (15 A) fuse

• An open in the wire

• Blown No. 5 (15 A) fuse

• An open in the wire

• Faulty seat belt switch

• Poor ground (G401, G402, G403)

• An open in the wireProCarManuals.com

Integrated Contro l Uni t
Inpu t Tes t (cont'd )
Side Marke r Ligh t Flashe r System :
Termina l Tes
t conditio n Test: Desire d resul t Possible caus e if resul t i s no t obtaine d
A8
A9
A 5
A 6
A1 1
A3
PNK/BL U
BLU/WH T
Under al l condition s
Under al l condition s
Ignition switc h O N (II )
Headligh t switc h O N (II )
Ignitio n switc h O N (II )
and tur n signa l switc h in
lef t positio n
Ignition switc h O N (II )
an d tur n signa l switc h i n
righ t positio n
Connec t th e A 9 termina l
t o th e PNK/BL U
(o r BLU/WHT
1) terminal .Chec
k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r voltag e t o ground :
Ther e shoul d b e batter y voltage .
Chec k fo r voltag e to ground :
Ther e shoul d b e batter y voltage .
Chec k fo r voltag e t o ground :
Ther e shoul d b e batter y voltage .
Chec k fo r voltag e t o ground :
It shoul d chang e fro m 0 - 1 2 - 0 V
repeatedly .
Chec k th e fron t sid e marke r lights :
Th e lef t (o r right ) fron t sid e marke r
ligh t shoul d com e o n a s th e
batter y is connected . •
Poo r groun d (G401 , G402 , G403 )
• A n ope n in th e wir e
• Blow n No . 3 4 (1 5 A ) fus e
• A n ope n in th e wir e
• Blow n No . 5 (1 5 A ) fus e
• A n ope n in th e wir e
• Blow n No . 3 8 (1 5 A ) fus e
• Fault y headligh t switc h
• Fault y tailligh t rela y
• A n ope n in th e wir e
• Blow n No . 4 6 (1 0 A ) fus e
• Fault y tur n signal/hazar d rela y
• A n ope n i n th e wir e
• Blow n bul b
• Poo r groun d (G301 )
• A n ope n in th e wir e
Powe r Windo w Key-of f Time r System :
Termina l Tes
t conditio n Test
: Desire d resul t
Possible caus e if resul t i s no t obtaine d
A8
A 9
A 5
GRN/BLU2
GRN/RE D
A14
Unde r al l condition s
Unde r al l condition s
Ignition switc h O N (II )
Driver' s doo r ope n
Passenger' s doo r ope n
Connec t th e A 9 termina l
to th e A1 4 terminal .
Check fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r voltag e t o ground :
Ther e shoul d b e batter y voltage .
Chec k fo r voltag e t o ground :
Ther e shoul d b e batter y voltage .
Chec k fo r voltag e t o ground :
Ther e shoul d b e 1 V or less .
Chec k windo w operation : Th e powe r
window s shoul d wor k wit h th e ke y
OFF .
• Poo r groun d (G401 , G402 , G403 )
• A n ope n i n th e wir e
• Blow n No . 34(1 5 A ) fus e
• A n ope n i n th e wir e
• Blow n No . 5 (1 5 A ) fus e
• A n ope n in th e wir e
• Fault y doo r switc h
• Poo r groun d (G401 , G402 , G403 )
• A n ope n in th e wir e
• Fault y powe r windo w rela y
• Poo r groun d (G201 )
• A n ope n in th e wir e
ProCarManuals.com

Lights-on Reminde r Syste m
Chime Tes t
NOTE : Refe r t o pag e 23-168 for the input test of the
lights-on reminde r circuit.
Whe n th e ignitio n ke y i s turne d of f an d remove d wit h
th e light s on , voltag e is applie d t o th e reminde r circui t i n
th e integrate d contro l unit . Whe n yo u ope n th e driver' s
door , th e circui t sense s groun d throug h th e close d doo r
switch . Wit h voltag e a t th e "A6 " terminal , groun d a t th e
"GRN/BLU
2" terminal , an d n o voltag e a t th e "A5 " termi -
nal , th e chim e sound s t o remin d th e drive r t o tur n of f
th e lights .
1 . Remov e th e dashboar d lowe r cover , an d disconnec t
th e connectors .
CONNECTOR S
DASHBOARDLOWERCOVER
CHIME
Vie w fro m wir e sid e
2. Tes t th e chim e b y connectin g batter y powe r t o th e
"B " terminal , an d groun d t o th e "A " terminal , an d
cyclin g th e powe r on-of f repeatedly .
3 . I f th e chim e fail s t o soun d ever y tim e powe r i s
cycled , replac e it .
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