1991 ACURA NSX brake

Trunk Li d
Replacement/Adjustmen t
1. Remov e th e mountin g screws , the n remov e th e rea r hatc h ai r scoop .
2. Disconnec t th e high-moun t brak e ligh t harnes s connector , an d remov e th e harnes s clam p fro m th e suppor t strut .
3. Remov e th e trun k li d b y removin g th e trun k li d mountin g bolts .
4. Installatio n i s th e revers e of the remova l procedure .
NOTE:
• Mak e sur e th e high-moun t brak e ligh t connecto r i s connecte d properly .
• Adjus t th e trun k li d alignment .
TRUNK LI D MOUNTIN GBOLTS6 x 1. 0 m m13 N- m (1. 3 kg-m ,9 Ib-ft ) HING
E MOUNTIN G
BOLT S
6 x 1. 0 m m13 N- m (1. 3 kg-m ,9 Ib-ft )
HIGH-MOUN T BRAK E
LIGH T HARNES S MOUNTIN
G SCRE W
SUPPOR T STRU T
SUPPOR T STRU T
BOLT
TRUN K LI D HING EAdjust th e trun k li d hinge s for eand aft , an d righ t an d lef t a sneede d t o equaliz e th e ga p betwee nthe trun k li d an d th e body .
REAR HATC H
AI R SCOO P
E-CLIPReplace .
HARNES S
CLAM P
SUPPORT STRUT
SHIMUse shim s a s require d t o mak ethe trun k li d fi t flus h wit h th ebod y a t th e rea r edge .
HIGH-MOUN TBRAKE LIGH THARNES S
STRIKERAdjust th e strike r righ t o r lef t t oalig n i t wit h th e trun k li d latch .
HIGH-MOUN T BRAK E
LIGH T HARNES S
TRUN K LI D EDG E
CUSHION S
Tur n a s neede d t o
mak e th e trun k li d fi t
flus h wit h th e body .
CORROSIO N RESISTAN T BOL T
6 x 1. 0 m m10 N- m (1. 0 kg-m ,7.2 Ib-ft ) TRUN
K LI D
TRUN K LI D
HING E
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Gauge Assembly

Bulb Locations

GAUGE LIGHTS (1.4W x 2)

SRS INDICATOR LIGHT (1.4 W)

RIGHT TURN SIGNAL INDICATOR LIGHT (1.4 W)

EPS INDICATOR LIGHT (1.4 W)

BRAKE SYSTEM LIGHT (1.4 W)

SEAT BELT REMINDER LIGHT (1.4 W)

TCS INDICATOR

LIGHT (1.96 W)

LOW FUEL INDICATOR

LIGHT (1.4 W)

GAUGE LIGHT

(1.4
W)
HIGH BEAM INDICATOR LIGHT (1.4 W)

LEFT TURN SIGNAL INDICATOR LIGHT (1.4 W)

ABS

INDICATOR LIGHT (1.4 W)

CHARGING SYSTEM LIGHT (1.4 W)

MALFUNCTION

INDICATOR

LAMP (MIL)

(1.4W)

LOW OIL PRESSURE

INDICATOR

LIGHT (1.4 W)

GAUGE LIGHT

(1.4
W)

GAUGE LIGHT

(3.0
W)
GAUGE LIGHT

(3.0
W)
GAUGE LIGHT

(3.0
W)
CRUISE INDICATOR LIGHT

(1.96
W)ProCarManuals.com

Brake Warnin g Syste m
Parking Brak e Switc h Tes t
1. Remov e th e cente r console , an d disconnec t th e con -
necto r fro m th e switch .
2. Chec k continuit y betwee n th e positiv e termina l an d
bod y groun d wit h th e brak e leve r u p an d down .
• Ther e shoul d b e n o continuit y wit h th e brak e leve r
down .
• Ther e shoul d b e continuit y wit h th e brak e leve r
up.
DOW N
BRAK E LEVE R
POSITIV E TERMINA L
BODY GROUN D
NOTE: (Canada )
I f th e parkin g brak e switc h i s OK , bu t th e brak e
warnin g syste m doe s no t work , mak e th e inpu t
test fo r th e daytim e runnin g light s contro l uni t
(see pag e 23-180 ).
Brak e Flui d Leve l Switc h Tes t
1. Remov e th e reservoi r cap . Chec k tha t th e floa t
move s u p an d dow n freely ; i f i t doesn't , replac e th e
reservoi r ca p assembly .
RESERVOI R CA P
FLOAT
Has a built-i nmagne t
Switch contact s close dwhen floa t drops .
Switc h contact s open , a t
prope r flui d level .
2. Chec k fo r continuit y betwee n th e terminal s wit h th e
floa t u p an d down .
There shoul d b e continuit y wit h th e floa t dow n an d
no continuit y wit h th e floa t up ; i f continuit y is incor -
rect, replac e th e reservoi r ca p assembly .
UP POSITIO N
DOWN POSITIO N
UP
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Interlock System
Control Unit Input Test
Disconnect the 8-P 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.
I
f
the terminals look OK, make the following input

tests at the connector .
– If a 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.
NOTE: If the shift lock solenoid clicks when you step

on the brake pedal with the ignition switch ON (the
Shift lever in position), the shift lock system is
electronically OK. If the shift lever cannot be shift-

ed from position, see page 23-160 ('93-'96)
('91-'92) and section 14
.

Shift Lock System:
No. Wire Test condition Test: Desired result Possible cause if result is not obtained

Key Interlock System:
No. Wire Test condition Test: Desired result Possible cause if result is not obtained
8-P CONNECTOR

View from wire side

INTERLOCK CONTROL UNIT

ORN/BLK

WHT/RED

YEL/BLK

BLK
BLK/RED

GRY/WHTProCarManuals.com

Safety Indicator

Component Location index

SRS components are located in this area. Review the SRS
component locations, precautions, and procedures in the
SRS section (24) before performing repairs or service.
SAFET
Y
INDICATOR (In the gauge assembly)

Removal, page 23-129 ('93-'96) ('91-'92)

Troubleshooting, page 23-152 ('94-'96) ('91-'93)
Input Test, page 23-150 ('94-'96) ('93) ('91-'92)

CEILING LIGHT

Test, page 23-201
ROOF LOCK SWITCH ( * 1)

Test, page 23-154 ('94-'96) ('91-'93)

PASSENGER'S DOOR SWITCH

Test, page 23-204
HIGH MOUNT BRAKE LIGHT

Test, page 23-211

BRAKE SWITCH

Test, page 23-211

DRIVER'S DOOR SWITCH

Test, page 23-204

ROOF HOLDER SWITCH (* 1)

Test, page 23-155 ('94-'96) ('91-'93)

ENGINE COMPARTMENT LID SWITCH

Test, page 23-325 ('93-'96) ('91-'92)
LEFT BRAKE LIGHT
FAILURE SENSOR

Test, page 23-153
TRUNK LATCH SWITCH

Test, page 23-205
RIGHT BRAKE LIGHT

FAILURE SENSOR

Test, page 23-153

*1: NSX-T (open top) only

Description

Safety Indicator System: LED's are used to indicate when the trunk lid, engine compartment lid, a door, or the roof is not latched, or when a brake
light is faulty, or when the roof is not stored or improperly stored in its holder. The LED's will go on and stay on for about
two seconds after the ignition switch has been turned ON, to show that the system circuit is functioning.

Brake Light Bulb Failure Indicator:

If all brake light bulbs are OK, the indicator light stays off because the ORN/WHT wire is grounded by the two brake light
failure sensors connected in series. With the brake lights off, the ground is provided through the diode, the failure sensor relay coil, and bulb filaments. With the brake light on, all four relays (two in the left sensor, two in the right sensor), con-
nected in series, supply ground. If any of the four bulbs is not working, the chain is broken and the ORN/WHT wire is not
longer grounded. The indicator light comes on.ProCarManuals.com

Brake Ligh t Failur e Senso r Tes t
1. Firs t mak e sur e th e brak e light s com e o n whe n th e
brak e peda l i s pressed .
• I f al l th e brak e light s com e on , g o t o ste p 2 .
• I f on e o f th e brak e light s doe s no t com e on , chec k
whethe r th e bul b is blown . I f th e bul b is OK , g o
to ste p 2 .
• I f non e of the brak e light s com e on , chec k th e
brak e ligh t circui t.
2 . Ope n th e trun k lid , an d remov e th e tri m pane l tha t
cover s th e righ t taillight . Watc h th e
ligh t i n th e safet y indicato r whe n th e A (WHT/GRN )
wir e o f th e 6- P connecto r i s grounde d an d th e igni -
tion switc h is turne d fro m OF F to O N (II) .
RIGH T FAILUR E SENSO R
6- P CONNECTO R
Vie w fro m wir e sid e
If th e ligh t come s o n an d stay s
on , chec k fo r a n ope n in th e A (WHT/GRN ) wir e
betwee n th e safet y indicato r an d th e righ t failur e
sensor .
If th e ligh t doe s no t sta y on , g o
t o ste p 3 .
3. Watc h th e ligh t a s yo u tur n th e igni -
tion switc h fro m OF F to O N (II) , wit h th e B (GRN )
wire o f th e 6- P connecto r grounde d an d th e brak e
peda l pressed .
If th e ligh t come s o n an d stay s
on, replac e th e righ t failur e sensor .
If th e ligh t doe s no t sta y o n , g o
t o ste p 4 . 4
. Remov e th e rea r tri m pane l tha t cover s th e lef t tail -
light . Watc h th e ligh t a s yo u tur n th e
ignitio n switc h fro m OF F to O N (II) , wit h th e A (GRN )
wire o f th e 6- P connecto r grounde d an d th e brak e
peda l pressed .
LEFT FAILUR E SENSO R
6-P CONNECTO R
View fro m wir e sid e
If th e ligh t come s o n an d stay s
on , ther e is a n ope n in th e A (GRN ) wir e betwee n
th e lef t failur e senso r an d th e righ t failur e sensor .
If th e ligh t doe s no t sta y on , g o
t o ste p 5 .
5. Watc h th e ligh t a s yo u tur n th e igni -
tion switc h fro m OF F to O N (II) , wit h th e B (BLK ) wir e
of th e 6- P connecto r grounde d an d th e brak e peda l
pressed .
• I f th e ligh t come s o n an d stay s
on , replac e th e lef t failur e sensor .
• I f th e ligh t doe s no t sta y on , chec k
fo r a n ope n in th e B (BLK ) wir e betwee n th e lef t
failur e senso r an d ground , an d chec k fo r a poo r
groun d a t G551 .
ProCarManuals.com

Taillights

Replacement

1. Open the trunk lid, and remove the rear trim panel.

2. Disconnect the 8-P connector and 2-P connector

from the taillight assembly.

3. Disconnect the 2-P connector from the trunk key

cylinder switch.

8-P CONNECTOR

2-P CONNECTOR

TRUNK KEY CYLINDER

CONNECTOR

REAR TRIM PANEL

4. Remove the four mounting nuts and rear panel, then

remove the ten mounting nuts and the taillight as-

sembly.

NEW GASKET

REAR PANEL

TAILLIGHT ASSEMBLY

5. Inspect the gasket; if it is distorted or stays com-

pressed, replace it.

6. After installing, run water over the lights to make

sure they don't leak.
Bulb Replacement

1. Open the trunk lid, and remove the rear trim panel.

2. Turn each socket 45° counterclockwise to remove

them from the taillight housing.

SOCKET

TURN SIGNAL LIGHT BULB (45CP)

and BRAKE LIGHT/TAILLIGHT BULBS (32CP/2CP)

TAILLIGHT BULB (2CP)

BACK-UP LIGHT BULB (32CP)

3. Remove the bulbs from the sockets.ProCarManuals.com

Brake Lights

Component Location Index

BRAKE SWITCH
Test, page 23-211

HIGH MOUNT BRAKE LIGHT (LED)
LED Replacement, page 23-212
('94-'96) ('91-'93)

Replacement, page 23-212 ('94-'96) ('91-'93) Test, page 23-211

RIGHT TAILLIGHT
Bul
b
Replacement, page 23-196
Failure Sensor Test, page 23-153
LEFT TAILLIGHT Bulb Replacement, page 23-196 Failure Sensor Test, page 23-153
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