1991 ACURA NSX light

Headliner/lnterior Trim

Replacement

To remove the headliner, first remove the: Sunvisors
Center pillar trim panels

Front pillar trim panels

Seats (see page 20-39('93-'96)

Ceiling light (see section 23)

NOTE:
When installing the headliner, be careful not to fold
or bend it. Also, be careful not to scratch the body.
Check that both sides of the headliner are securely

attached to the trim.

Disassemble in numbered sequence.
NOTE: When removing the rear trim panels, take care not to

damage the control units and relays.

Take care not to scratch the trim panels.

Clip Locations
CENTER PILLAR

TRIM PANEL

FRONT PILLAR
TRIM PANEL
DOOR TRIM
SIDE SILL

PAD

SIDE SILL

TRIM

REAR SIDE TRIM PANEL
CENTER ARMREST
Replacement, see page

20-49

OPENER
KNOB
SIDE SILL

TRIM

UNDER-DASH FUSE BOX LID

Installation is the reverse of the removal procedure.
NOTE: If necessary, replace any damaged clips.
RELEASE

HANDLE

Replacement,

see page 20-68
REAR SIDE TRIM PANEL CLIP
SIDE SILL

PAD
LEFT REAR TRIM PANEL

CLIP

REAR UPPER TRIM PANEL REAR CENTER
TRIM PANEL

GUIDE PIN

RIGHT REAR TRIM
PANEL LEFT SUNVISOR
CENTER SUNVISOR

RIGHT SUNVISOR

HEADLINERProCarManuals.com

Front Bumpe r
Replacemen t
1. Loose n th e mountin g screw , the n pul l th e righ t an d lef t fron t tur n signa l light s ou t an d disconnec t th e connectors .
2 . Remov e th e skir t covers , the n remov e th e bumpe r mountin g bolt s o n eac h side , an d lowe r skir t mountin g bolt .
3 . Lowe r th e inne r fender , the n remov e th e bumpe r mountin g nut s an d th e skir t mountin g bolt s fro m insid e th e fron t
fende r o n eac h side .
4. Lif t an d remov e th e fron t bumper .
NOTE:
• Disconnec t th e washe r hose , hor n connecters , an d ambien t senso r connector .
• A n assistan t i s helpfu l whe n removin g th e fron t bumper .
• Tak e car e no t t o scratc h th e fron t bumper .
BUMPER BRACKE T HOO K
INNER FENDE R
FRON T TUR N
SIGNA L LIGH T
5. Installatio n i s th e revers e o f th e remova l procedure .
NOTE : Inser t th e bumpe r bracke t hook s int o th e bumpe r bracke t holes .
CONNECTOR S
CORROSIO N RESISTAN T BOLT/NU T
BUMPE
R MOUNTIN G BOLT S
8 x 1.2 5 mm 2 2 N- m(2.2 kg-m , 1 6 Ib-ft ) AMBIEN
T
SENSOR
FRONT BUMPE R
HORN
CONNECTOR S
FRONT TUR N
SIGNA L LIGH T
SKIR T COVE R
LOWE R SKIR T MOUNTIN G
BOLT
MOUNTIN G SCRE W
SKIR T COVE R SKIR
T MOUNTIN G BOLT S
6 x 1. 0 m m10 N- m (1. 0 kg-m ,7.2 Ib-ft ) BUMPE
R MOUNTIN G NUT S
6 x 1. 0 m m10 N- m (1. 0 kg-m ,7.2 Ib-ft )
BUMPE R BRACKE T HOL E
ProCarManuals.com

Roof
Lock Receivers Adjustment
NOTE : Thi s adjustmen t shoul d b e don e i n th e followin g
orde r afte r removin g o r replacin g th e loc k receiver .
1 . Loose n th e loc k receive r mountin g bolt s a t eac h o f
th e fou r corners , the n tighte n the m lightly .
2 . Instal l th e roo f o n th e body .
CAUTION : Whe n installin g th e roof , mak e sur e
bot h roo f sid e lock s ar e unlocked .
NOTE:
• Mak e sur e eac h roo f sid e hoo k align s wit h th e
hoo k sto p properly .
• Befor e securin g th e roo f b y turnin g eac h roo f
sid e loc k handle , chec k tha t th e roo f sid e retaine r
aligns agains t th e fron t pilla r retaine r an d rea r
pillar pane l evenl y a t eac h side , an d chec k tha t
th e seal s fi t flush .
ProCarManuals.com

Seals/Retainers Alignmen t
Adjustmen t
NOTE: Whe n th e followin g part s hav e bee n replace d o r
removed , thi s adjustmen t shoul d b e done .
• Roo f sid e seal s
• Roo f sid e loc k unit s
• Fron t an d rea r pilla r seal s
CAUTION : T o preven t damage , plac e th e roo f o n a n
appropriat e pad .
1. Remov e th e roo f fron t tri m an d roo f sid e tri m (se e
pag e 20-82 ).
2 . Instal l th e roo f sid e loc k handle .
3 . Tur n th e roo f sid e loc k handl e t o th e locke d posi -
tion.
4. Loose n th e roo f sid e loc k uni t mountin g nuts , the n
tighte n the m lightly .
ROOF SID E
LOC K HANDL E
ROOF SID ELOC K UNI T
NUT S6 x 1. 0 m m11 N- m (1. 1 kg-m ,8 Ib-ft )
Loosen .
NUTS6 x 1. 0 m m11 N- m (1. 1 kg-m ,8 Ib-ft )
Loosen .
5. Retur n th e roo f sid e loc k handl e to th e unlocke d posi -
tion . 6
. Remov e th e fron t an d rea r roo f rai l tri m (se e pag e
20-79 ).
7 . Loose n th e loc k receive r mountin g bolt s a t eac h o f th e
fou r corners , the n tighte n the m lightly .
Front:
FRON T LOC KRECEIVE R
Rear:
BOLT S8 x 1.2 5 mm22 N- m (2. 2 kg-m ,16 Ib-ft )
Loosen .
BOLTS
8 x 1.2 5 m m REA R LOC K22 N- m (2. 2 kg-m , RECEIVE R16 Ib-ft )
Loosen .
8. Instal l th e roo f o n th e body .
CAUTION : Whe n installin g th e roof , mak e sur e bot h
roof sid e lock s ar e unlocked .
NOTE: Mak e sur e eac h roo f sid e hoo k align s wit h th e
hoo k sto p properly .
ProCarManuals.com

('93-'96), 86 ('91-'92 Models)
MODE CONTROL MOTOR
Replacement, page 22-57
('93-'96), 69 ('91-'92 Models)
Test, page 22-58
('93-'96), 91 ('91-'92 Models)
"DEF" DOOR
Adjustment, page 22-77
('92-'96), 72 ('91Models)

"HEAT" DOOR

Adjustment, page 22-77
('92-'96), 72 ('91Models)

RECIRCULATION

CONTROL MOTOR

Replacement, page 22-59 ('93-'96), 64 ('91-'92)
Test, page 22-59 ('93-'96), 64 ('91-'92 Models)

BLOWER UNIT

Replacement, page 22-67 ('93-'96), 63 ('91-'92)Overhaul, page 22-68 ('93-'96), 62 ('91-'92)


RECEIVER/DRYER

Serves as a reservoir which filters and
removes moisture from the refrigerant.
OUTSIDE AIR TEMPERATURE SENSOR

Removal, page 22-62 ('93-'96), 86 ('91-'92 Models)

Test, page 22-62


DUAL CONDENSER

Dissipates the heat which was

absorbed by the refrigerant.

Replacement, page 22-79 ('93-'96), 74 ('91Models)Overhaul, page 22-80 ('93-'96), 75 ('91Models)

HEATER CORE

TEMPERATURE SENSOR
Removal, page 22-64

Test, page 22-64
AIR MIX CONTROL

MOTOR

Replacement, page 22-56 ('93-'96), 70 ('91-'92 Models)
Test, page 22-57 ('93-'96), 69 ('91-'92 Models)

HEATER-EVAPORATORUNIT
Replacement, page 22-74('93-'96), 66 ('91-'92 Models)
Overhaul, page 22-76 ('93-'96), ('92), 71 ('91 Models) IN-CAR TEMPERATURE SENSOR
Removal, page 22-61('93-'96), 69 ('91-'92 Models)
Test, page 22-61 ('93-'96), 69 ('91-'92 Models)
COMPRESSOR (NIPPONDENSO)
Compresses the refrigerant and

then forces it through the condenser.

CLIMATE CONTROL UNIT
Replacement, page 22-54
Adjustment, page 22-55
SUNLIGHT SENSOR

Removal, page 22-63 ('93-'96), 87 ('91-'92 Models)Test, page 22-63 ('93-'96), 87 ('91-'92 Models)

EVAPORATOR

TEMPERATURE

SENSOR

Removal, page 22-65 ('93-'96), 88 ('91-'92 Models)
Test, page 22-65 ('93-'96), 88 ('91-'92 Models)

HEATER VALVE CABLE

Adjustment, page 22-58 ('93-'96),
91 ('91-'92), 75 ('93-'96), 66 ('91-'92)

VENT DOOR CONTROL MOTOR
Replacement, page 22-60

('93-'96)
, 69 ('91-'92 Models)
Test, page 22-60 ('93-'96),
69 ('91-'92 Models)

A/C TRIPLE
PRESSURE SWITCHProCarManuals.com

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.

POWER TRANSISTORBLOWER MOTOR

RECIRCULATION

CONTROL
MOTOR

CONDENSER
FAN MOTOR UNDER-HOOD RELAY BOX A
(CONDENSER FAN RELAY, COMPRESSOR CLUTCH RELAY,
BLOWER MOTOR HIGH RELAY, BLOWER MOTOR RELAY)
UNDER-HOOD

FUSE/RELAY

BOX

HEATER CORE TEMPERATURE SENSOR
CLIMATE CONTROL UNIT VENT DOOR
CONTROL MOTOR
OUTSIDE AIR
TEMPERATURE SENSOR ENGINE COMPARTMENT

FUSE/RELAY BOX
A/C TRIPLE PRESSURE SWITCH
FAN CONTROL UNIT (Fan radiator and con-

denser fans inside car,

behind seats)
EVAPORATOR

TEMPERATURE

SENSOR

IN-CAR

TEMPERATURE
SENSOR
MODE CONTROL

MOTOR

AIR MIX CONTROL MOTOR
SUNLIGHT

SENSORProCarManuals.com

Troubleshooting

Self-diagnosis Circuit Check
The Automatic Climate Control System has a built-in self diagnosis feature. To run it, turn the ignition switch ON (II),
then turn the fan speed dial to the AUTO position. Set the temperature control dial to 60° F(18°C), then gradually move

0

th
e
dial up the temperature range to 90°F (32°C). At each temperatu\
re setting, push both the AUTO and OFF burtons
o

n
the control unit at the same time. Wait for at least one minute for the\
system to readjust and check for problems.

If any problems are found in circuits "A" through "I", the system will indicate which circuit has the problem by lighting

the respective indicator light.
NOTE: The climate control unit does not memorize which self-diagnosis indicator lights come on. If you turn the ig-

nition switch OFF, the indicator light memory will be lost.

AUTO BUTTON

OFF BUTTON

TEMPERATURE CONTROL DIAL
TEMP DISPLAY


FAN SPEED DIAL

NOTE:
When you turn the ignition switch OFF, the self-diagnosis function will be canceled. After completing repair work, run the self-diagnosis again to make sure that there are no other malfunctions.COMPONENT WITH PROBLEM
IN-CAR TEMPERATURE SENSOR
OUTSIDE AIR TEMPERATURE

SENSOR

SUNLIGHT SENSOR
HEATER CORE TEMPERATURE

SENSOR

EVAPORATOR TEMPERATURE

SENSOR

AIR MIX CONTROL MOTOR
MODE CONTROL MOTOR
RECIRCULATION CONTROL MOTOR
VENT DOOR CONTROL MOTOR
POSSIBLE CAUSE

Open or short circuit

Open or short circuit

Open or short circuit

Open or short circuit

Open or short circuit

Open or short circuit

Air mix door stuck

Open position signal circuit

Mode door stuck

Open position signal circuit

Open or short circuit

Vent door stuck
Refer to PAGE

22-16

22-1

8

22-20
22-22
22-24
22-2
6
22-28
22-30
22-32
INDICATOR

MODE

A/C
ON
(A/C)

OFF
(A/C)

LED on

defroster

button

A

B

C
D

E

F

G
H
I
ProCarManuals.com

Sunlight Sensor

Removal

With a small screwdriver, carefully pry the sunlight sen-

sor out of the dashboard and disconnect its connector.

Protect the dashboard; cover it with a shop towel before

you pry against it.

SUNLIGHT

SENSOR
Test

Measure the voltage between the terminals with the sen-

sor out of direct sunlight.

• With the connector connected (probe the back of it):

1.4 ± 0.2 V

• With the connector disconnected: 0.1 — 0.2 VProCarManuals.com