1991 ACURA NSX service

Dashboard

Component Removal/Installation (cont'd)

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.

Center console panel removal:
NOTE:
Take cere not to scratch the dashboard, center console panel and related parts.Do not drop the screws inside the dashboard.
Remove the center armrest (see page 20-49('94-'96) ('91-'93)), clock and center air vent (see page 20-50 ('94-'96) ('91-'93)).

Disassemble in numbered sequence.

ASHTRAY

CENTER CONSOLE

PANEL
Disconnect the

connectors.

Lift up the parking

brake lever.
SRS UNIT
Installation is the reverse of the removal procedure. NOTE: Make sure the connectors are connected properly.ProCarManuals.com

Dashboard
Componen t Removal/Installatio n
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 .
NOTE : Tak e car e no t t o scratc h th e dashboard ,
steerin g colum n an d relate d parts .
CAUTION : Whe n pryin g wit h a fla t ti p screw -
driver , wra p it wit h protectiv e tap e o r a sho p towe l
t o preven t damage .
Drivers :
RETRACTO R SWITCH /
DAS H BRIGHTNES S
CONTROLLER
Disconnect th e
connectors ?
DASHBOAR D LOWE R
COVE R (Driver's )
Installation i s th e revers e o f th e remova l procedure .
NOTE : Mak e sur e th e connector s ar e connecte d properly .
Disconnec t th e connectors .
DASHBOAR D
LOWE R PA D
INSTRUMEN
T
PANEL
TCS SWITC H
DASHBOAR DBRACE
DASHBOAR D
LOWE R PA D
INSTRUMEN TPANEL
CLIP
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Replacement

NOTE:
Remove the access panel, then remove the
short connector (RED). Disconnect the connec-
tor between the airbag and cable reel, then con-
nect the short connector (RED) to the airbag
connector.

AIRBAG

CONNECTOR
CABLE REEL

CONNECTOR

ACCESS PANEL
SHORT CONNECTOR
(RED)

Connect the special tool to the cable reel
connector.

CABLE REEL

CONNECTOR

SHORT

CONNECTOR

(RED)
SHS

SERVICE CONNECTOR

07MAZ–SP00200

(cont'd)

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.
1. To remove the dashboard, first remove the: Seats (see page 20-39 ('93-'96), 38)
Dashboard lower cover (Driver's) (see page
20-54('94-'96) ('91-'93))
Dashboard lower pad (see page 20-54('94-'96) ('91-'93))

Dashboard brace (see page 20-54('94-'96)('91-'93))

Cente
r
armrest (see page 20-49('94-'96)('91-'93))


Clock, center air vent and console panel (see
pages 20-50('94-'96) ('91-'93), 51('94-'96) ('91-'93)

52('94-'96) ('91-'93))

Climate control unit and stereo elassette/ratio (see
page 20-53('94-'96)('91-'93))
Dashboard lower cover (Passenger's) (see page
20-53('94-'96) ('91-'93))

Glove box lid and glove box (see page 20-53('94-'96)('91-'93))

2. Lower the Steering column (see section 17).
To avoid accidental deployment and
possible injury always install the short connector on the airbag connector when the SRS wire
harness is disconnected.ProCarManuals.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

Climate Contro l Uni t
Replacemen t
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 .
1 . Remov e th e cloc k (se e sectio n 23 ).
2 . Remov e th e tw o screw s behin d th e clock , the n
remov e th e cente r ai r ven t (se e sectio n 20 ). 3
. Tak e ou t th e ashtra y an d remov e th e tw o screw s
fro m unde r th e ashtray .
ASHTRA Y
4. Remov e th e fou r screws , the n remov e th e cente r
armrest .
PAD
CENTE R ARMRES T
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In-car Temperature Sensor
Removal
The in-car temperature sensor assembly includes a
small fan (aspirator fan) to draw air past the sensor (see
page 22-66('93-'96), 91('91-'92)).

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.

1. Remove the center console panel (see page 22-54).
2. Remove the two screws and the in-car temperature sensor from the under side of the center console

panel. Be careful not to damage the center console

panel.

IN-CAR TEMPERATURE

SENSOR

UNDER SIDE OF CENTER
CONSOLE PANEL
Test
Compare the resistance reading between the No, 1 and No. 2 terminals of the in-car temperature sensor with
specifications shown in the following graph: It should

be within specification.

TEMPERATURE

CAUTION: The sensor uses a thermistor which can
be damaged if high current is applied to it during test-
ing. Therefore, use a circuit tester that puts out a
measuring current of 1 mA or less.ProCarManuals.com

A/C Servic e Tip s an d Precaution s
The ai r conditionin g syste m use s HFC-134 a (R-134a ) refrigeran t an d polyalkyleneglyco l (PAG ) refrigeran t oi l (ND-OI L
8 : P/ N 38899-PR7-A01) , whic h ar e no t compatibl e wit h CFC-1 2 (R-12 ) refrigeran t an d minera l oil . D o no t us e R-1 2 refriger -
an t o r minera l oi l i n thi s system , an d d o no t attemp t t o us e R-1 2 servicin g equipment ; damag e t o th e ai r conditionin g
system o r you r servicin g equipmen t wil l result .
Only us e servic e equipmen t tha t i s U.L.-liste d an d i s certifie d t o mee t th e requirement s o f SA E J221 0 t o remov e R-134a;
fro m th e ai r conditione r system .
CAUTION : Exposur e to ai r conditione r refrigeran t an d lubrican t vapo r o r mis t ca n irritat e eyes , nos e an d throat , Avoi d
breathin g th e ai r conditione r refrigeran t an d lubrican t vapo r o r mist .
I f accidenta l syste m discharg e occurs , ventilat e wor k are a befor e resumin g service .
R-134 a servic e equipmen t o r vehicl e ai r conditione r system s shoul d no t b e pressur e teste d o r lea k teste d wit h compresse d
air.
Som e mixture s o f ai r an d R-134 a hav e bee n show n to b e combustibl e elevate d pressure s an d ca n resul t
i n fir e o r explosio n causin g injur y o r propert y damage . Neve r us e compresse d ai r t o pressur e tes t R-134 a servic e
equipmen t o r vehicl e ai r conditionin g systems .
Additiona l healt h an d safet y informatio n ma y b e obtaine d fro m th e refrigeran t an d lubrican t manufacturers .
1 . Alway s disconnec t th e negativ e cabl e fro m th e batter y wheneve r replacin g ai r conditionin g parts .
2 . Kee p moistur e an d dus t ou t o f th e system . Whe n disconnectin g an y lines , plu g o r cap the fitting s immediately ; don' t
remov e th e cap s o r plug s unti l jus t befor e yo u reconnec t eac h line .
3 . Befor e connectin g an y hos e o r line , appl y a fe w drop s o f refrigeran t oi l (ND-OI L 8 ) t o th e O-ring .
4. Whe n tightenin g o r loosenin g a fitting , us e a secon d wrenc h t o suppor t th e matchin g fitting .
5. Whe n recoverin g th e system , us e a R-134 a refrigeran t Recovery/Recycling/Chargin g System ; don' t releas e
refrigeran t int o th e atmosphere .
6 . Ad d refrigeran t oi l (ND-OI L 8 ) afte r replacin g th e followin g parts :
NOTE:
• D o no t retur n th e oi l t o th e containe r onc e dispense d an d neve r mi x wit h othe r refrigeran t oil s t o avoi d
contamination .
• Immediatel y afte r usin g th e oil , replac e th e ca p o n th e containe r an d sea l i t t o avoi d moistur e absorption .
• D o no t spil l th e refrigeran t oi l o n th e car ; i t ma y damag e th e paint ; i f th e refrigeran t oi l contact s th e paint , was h i t
of f immediately .
Condenser ........................ . 10 c c (1/ 3 fl oz )
Evaporato r ........................ . 1 0 c c (1/ 3 f l oz )
Lin e o r hos e ....................... . 2 0 c c (2/ 3 f l oz )
Receive r ........................... . 1 0 c c (1/ 3 f l oz )
Compresso r ....................... . O n compresso r
replacement , subtrac t th e volum e o f oi l drain -
e d fro m th e remove d compresso r fro m 14 0 c c
(4-2/ 3 f l oz) , an d drai n th e calculate d volum e
o f oi l fro m th e ne w compressor : 14 0 c c (4-2/ 3
f l oz ) — Volum e o f oi l fro m remove d com -
presso r = Volum e t o drai n fro m ne w com -
pressor .
CORROSIO N RESISTAN T BOL T
Suctio n hos e an d discharg e hos eto A/ C line s ..................... . 2 2 N- m (2. 2 kg-m , 1 6 Ib-ft )Discharg e lin e C(bot h sides ) ..................... . 2 3 N- m (2. 3 kg-m , 1 7 Ib-ft )Condense r lin e A(bot h sides ) ..................... . 2 3 N- m (2. 3 kg-m , 1 7 Ib-ft )Condense r lin e C to lef t sid econdense r ....................... . 1 4 N- m (1. 4 kg-m , 1 0 Ib-ft )Receiver/drye r ................. . 1 4 N- m (1. 4 kg-m , 1 0 Ib-ft )
Receive r lin e an d suctio n lin e t o heate rassembl y ........................ . 2 2 N- m (2. 2 kg-m , 1 6 Ib-ft )Compresso r hos e mountin gbolts .............................. . 2 2 N- m (2. 2 kg-m , 1 6 Ib-ft )Compresso r mountin gbolts .............................. . 2 5 N- m (2. 5 kg-m , 1 8 Ib-ft )Compresso r bracke tmountin g bolt s ................ . 5 0 N- m (4. 5 kg-m , 3 6 Ib-ft )Idler pulle y cente r nu t ....... . 4 5 N- m (4. 5 kg-m , 3 3 Ib-ft )6 m m bol t ................... . 1 0 N- m (1. 0 kg-m , 7 Ib-ft )
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A/C Syste m Servic e
Performanc e Tes t
The performanc e tes t wil l hel p determin e i f th e ai r con -
ditionin g syste m is operatin g withi n specifications .
Only us e servic e equipmen t tha t i s U.L.-liste d an d is cer -
tifie d t o mee t th e requirement s o f SA E J221 0 t o remov e
HFC-134 a (R-134a ) fro m th e ai r conditionin g system .
CAUTION : Exposur e t o ai r conditione r refrigeran t
an d lubrican t vapo r o r mis t ca n irritat e eyes , nos e
an d throat . Avoi d breathin g th e ai r conditione r
refrigeran t an d lubrican t vapo r o r mist .
I f accidenta l syste m discharg e occurs , ventilat e wor k
are a befor e resumin g service .
R-134 a servic e equipmen t o r vehicl e ai r conditionin g sys -
te m shoul d no t b e pressur e teste d o r lea k teste d wit h
compresse d air .
Som e mixture s o f ai r an d R-134 a hav e
bee n show n to b e combustibl e a t elevate d pressure s
an d ca n resul t i n fir e o r explosio n causin g injur y o r
propert y damage . Neve r us e compresse d ai r t o pres -
sure tes t R-134 a servic e equipmen t o r vehicl e ai r
conditionin g systems .
Additiona l healt h an d safet y informatio n ma y b e obtaine d
fro m th e refrigeran t an d lubrican t manufacturers .
1 . Connec t a R-134 a refrigeran t Recovery/Recycl -
ing/Chargin g Syste m to th e ca r a s show n followin g
th e equipmen t manufacturer' s instructions .
2 . Inser t a thermomete r i n th e cente r ven t outlet .
Determin e th e relativ e humidit y an d ai r
temperatur e b y callin g th e loca l weathe r informa -
tion line .
3. Tes t conditions :
• Avoi d direc t sunlight .
• Ope n engin e cover .
• Ope n fron t doors .
• Se t th e temperatur e contro l dia l t o MA X COO L
an d pus h th e mod e contro l butto n t o VEN T an d
FRES H button .
• Tur n th e fa n switc h t o MAX .
• Ru n th e engin e a t 1,50 0 RPM .
• N o drive r o r passenger s i n vehicle .
4 . Afte r runnin g th e ai r conditionin g fo r 1 0 minute s
unde r th e abov e tes t conditions , rea d th e deliver y
temperatur e fro m th e thermomete r i n th e das h ven t
an d th e hig h an d low syste m pressur e fro m th e A/ C
gauges .
Recovery/Recycling/Chargin g Syste m
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