1997 ACURA NSX Service Repair Manual

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 .
UNDER-HOO D RELA Y BO X BBLOWE R MOTO R RELA Y
BLOWE R MOTO R HIG H RELA Y
COMPRESSO R CLUTC H RELA Y
POWER TRANSISTO R
BLOWE R MOTO R
RECIRCULATIO N
CONTRO L
MOTO R
CONDENSE R
FA N MOTO R UNDER-HOO
D RELA Y BO X A
(CONDENSE R FA N RELAY )
HEATER COR E TEMPERATUR E SENSO R
CLIMAT E CONTRO L UNI T VEN
T DOO R
CONTRO L MOTO R
OUTSID E AI RTEMPERATUR E SENSO R
A/C TRIPL E PRESSUR E SWITC H
ENGIN E COMPARTMEN T
FUSE/RELA Y BO X
FAN CONTRO L UNI T(Fan radiato r an d con -
dense r fan s insid e th e
vehicle , behin d seats )
EVAPORATO RTEMPERATUR E
SENSO R
MOD E CONTRO L
MOTO R
IN-CA R
TEMPERATUR E
SENSO R AI
R MI X CONTRO L MOTO R
UNDER-HOO
D
FUSE/RELAYBOX
SUNLIGH TSENSOR
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Troubleshooting
Self-diagnosis Circui t Chec k
The Automati c Climat e Contro l Syste m ha s a built-i n sel f diagnosi s feature . T o ru n it , tur n th e ignitio n switc h O N (II) ,
the n tur n th e fa n spee d dia l t o th e AUT O position . Se t th e temperatur e contro l dia l t o 60° F (18°C) , the n graduall y mov e
the dia l u p th e temperatur e rang e to 90° F (32°C) . A t eac h temperatur e setting , pus h bot h th e AUT O an d OF F button s
on th e contro l uni t a t th e sam e time . Wai t fo r a t leas t on e minut e fo r th e syste m to readjus t an d chec k fo r problems .
I f an y problem s ar e foun d i n circuit s "A " throug h "I" , th e syste m wil l indicat e whic h circui t ha s th e proble m b y lightin g
th e respectiv e indicato r light .
NOTE : Th e climat e contro l uni t doe s no t memoriz e whic h self-diagnosi s indicato r light s com e on . I f yo u tur n th e ig -
nitio n switc h OFF , th e indicato r ligh t memor y wil l b e lost .
AUT O BUTTO NOFF BUTTO N
TEMPERATUR E TEM P DISPLA Y
CONTRO L DIA LFAN SPEE D DIA L
NOTE :
• Whe n yo u tur n th e ignitio nswitch OFF , th e self-diagnosi s functio n wil l b e canceled .
• After completin g repair work, run th e self-diagnosi s agai n to mak e sure that ther e are n o othe r malfunctions .
22-16
22-18
22-2 0
22-2 2
22-2 4
22-2 6
22-2 8
22-3 0
22-3 2
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Function Selection and Operation Check

This check will quickly and automatically select and operate all functions of the climate control system, in the combina-

tions and sequence shown below. It may help clarify a problem, or identify one that didn't show up when you perform

the self-diagnosis circuit check.

Turn the FAN switch to AUTO, then push in both the MODE and AUTO buttons and hold them in while you start the

engine. The control unit will then automatically run the check in eight steps, one step every five seconds.

To stop at one of those steps, push the MODE button; to continue, push it again for each step after that.

Pushing the OFF button or turning the ignition OFF, will turn off the check.

Check the temperature, volume, and source of the air flow, and compare it to what the chart shows it should be.ProCarManuals.com

Use thi s char t i f th e self-diagnosi s check s don' t identif y an y caus e fo r th e symptom .
Acros s eac h ro w in th e chart , th e potentia l source s o f a sympto m ar e ranke d in th e orde r the y shoul d b e inspected , start -
ing wit h Fin d th e sympto m in th e lef t column , rea d acros s t o th e mos t likel y source , the n refe r t o th e pag e liste d a t th e
top o f tha t column . I f inspectio n show s th e componen t i s OK , tr y componen t etc .
Symptom-to-Component s Char t
Troubleshootin g
22-34 22-16 22-18 22-20 22-22 22-24 22-26 22-28 22-30 22-32 22-36 22-40 22-42 22-44 22-48
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Climate Control Unit Input/Output Signals

CLIMATE

CONTROL UNIT

View from wire sideProCarManuals.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 i n 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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5. Remove the three screws and center console

panel, then disconnect the 3P connector and 4P

connector from the floor wire harness.

CENTER CONSOLE PANEL

6. Remove the four screws, then disconnect the 14P

and 30P connectors from the automatic climate

control unit and remove it.

CLIMATE

CONTROL UNIT

UP CONNECTOR
30P CONNECTOR

7. Install in the reverse order removal.ProCarManuals.com

Adjustment

The calibration switch can raise or lower the set temper-

ature by ± 3°F (1.5°C) in relation to the digitally-

displayed temperature.ProCarManuals.com