ACURA RL KA9 1996 Service Repair Manual

Evaporator/Blower Uni t
Replacemen t (cont'd )
8. Remov e th e wir e harnes s connector s an d th e SR S
mai n harnes s cli p fro m th e body . Disconnec t th e
connector s fro m th e multiple x contro l uni t (passen -
ger's ) unit . Loose n th e uppe r mountin g bolt , the n
remov e th e mountin g bolt s an d th e contro l unit .
WIRE HARNES S
CONNECTOR S
WIR E HARNES S
CONNECTOR S
SR S MAI N HARNES S CLI P MULTIPLE
X
CONTRO L
UNIT(PASSENGER'S )
9. Remov e th e dus t an d polle n filte r assemblie s (se e
pag e 22-68 ).
10 . Disconnec t th e drai n hose . Remov e th e self-tappin g
screws , th e mountin g bolts , th e mountin g nut s an d
the evaporator/blowe r unit .
NOTE : B e carefu l no t t o damag e o r ben d th e capil -
lar y tube .
6 x 1. 0 m m9.8 N- m(1.0 kgf-m , 7. 2 Ibf-ft )
DRAIN HOS E
EVAPORATOR-BLOWE R
UNIT
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
11. Instal l i n th e revers e orde r o f removal . Mak e not e o f
the followin g items .
If you'r e installin g a ne w evaporator , ad d refrig -
eran t oi l (ND-OI L 8 ) (se e pag e 22-73 ).
Replac e th e O-ring s wit h ne w one s a t eac h fitting ,
an d appl y a thi n coa t of refrigeran t oi l befor e
installin g them .
NOTE : B e sur e t o us e th e righ t O-ring s fo r HFC -
134 a (R-134a ) t o avoi d leakage .
Instal l th e capillar y tub e alon g th e suctio n line .
NOTE : B e carefu l no t t o damag e o r ben d th e
capillar y tube .
Appl y sealan t t o th e grommets .
Mak e sur e tha t ther e is n o ai r leakage .
Charg e th e syste m (se e pag e 22-89 ), an d tes t it s
performanc e (se e pag e 22-76 ).
ProCarManuals.com

Overhaul
NOTE: Th e blowe r moto r an d th e recirculatio n contro l
moto r ca n b e replace d withou t removin g th e evapora -
tor/blowe r unit .
1 . Remov e th e filte r li d an d th e dus t an d polle n filte r
assemblies , the n remov e th e bolt s an d th e recircu -
latio n housing . I f necessary , remov e th e self-tap -
pin g screw s an d th e recirculatio n contro l motor .
2 . I f necessary , remov e th e self-tappin g screws , th e
blowe r motor , th e self-tappin g screw s an d th e powe r
transistor .
3 . Pul l ou t th e evaporato r temperatur e sensor . Remov e
th e self-tappin g screws , the n carefull y separat e th e
housings . Remov e th e evaporator .
4 . I f necessary , remov e th e expansio n valv e an d th e
evaporato r lines .
NOTE : Whe n loosenin g th e nut s o f th e expansio n
valve , us e a secon d wrenc h t o hol d th e expansio n
valve . Otherwise , the y ca n b e damaged .
RECIRCULATIO N
CONTRO L MOTO R
Test , pag e 22-5 9
FILTE R LI D
UPPE R HOUSIN G
EVAPORATO RBlow dir t ou t o f fin swith compresse d air .
97. 4 mm (3.8 3 in)
Cor e cente r
32.7 mm (1.2 9 in)
EVAPORATO R
TEMPERATUR E
SENSO R
Test, pag e 22-6 3
LOWE R HOUSIN G
EXPANSIO N VALV E
POWE R TRANSISTO R
Test , pag e 22-6 3
5.Assembl e in th e revers e orde r o f disassembly . Mak e
not e o f followin g items .
Replac e th e O-ring s wit h ne w one s a t eac h fittin g
an d appl y a thi n coa t of refrigeran t oi l befor e
installin g them .
NOTE : B e sur e to us e th e righ t O-ring s fo r HFC -
134 a (R-134a ) t o avoi d leakage .
Instal l th e expansio n valv e capillar y tub e wit h
th e capillar y tub e i n contac t wit h th e outle t lin e
directly , an d wra p it wit h tape .
NOTE : Mak e sur e ther e is n o foreig n matte r stuc k
betwee n th e capillar y tub e an d th e outle t line .
Reinstal l th e evaporato r temperatur e senso r t o
it s origina l location .
Whe n removin g recirculatio n contro l motor , mak e
sur e tha t th e recirculatio n contro l door s an d link -
ag e mov e smoothl y withou t binding .
Afte r reassembly , mak e sur e th e recirculatio n
contro l moto r run s smoothl y (se e pag e 22-59 ).
Mak e sur e tha t ther e is n o ai r leakage .
RECIRCULATIO N
HOUSIN G
DUS T AN D POLLE N FILTE R ASSEMBLIE S
GROMME T
EVAPORATO R LINE S
CAPILLAR Y TUB E
TAPE S (Replace )
BLOWE R MOTO R
ProCarManuals.com

Dust an d Polle n Filter s
Replacemen t
1. Remov e th e glov e bo x (se e sectio n 20 ).
2 . Remov e th e glov e bo x bac k cove r (se e pag e 22-65 ).
3 . Remov e th e filte r lid .
FILTE R LI D
4. Tur n th e ignitio n switc h O N (II) , an d se t th e recircu -
latio n contro l switc h o n RECIRCULATE .
5 . Pul l th e dus t an d polle n filte r assemblie s ou t o f th e
recirculatio n housin g a s shown . Separat e th e firs t
filte r assembl y fro m th e secon d filte r assembly ,
the n remov e th e firs t filte r assembly .
DUST AN D POLLE NFILTER ASSEMBLIE S
FIRST DUS T AN D
POLLE N FILTE R
ASSEMBL Y
SECON D DUS T AN D POLLE N FILTE R ASSEMBL Y
6. Remov e th e secon d dus t an d polle n filte r assembl y
fro m th e recirculatio n housin g a s shown .
SECON D DUS T AN D POLLE N FILTE R ASSEMBL Y
7. Remov e th e dus t an d polle n filte r fro m th e filte r
housing .
DUST AN D POLLE N FILTE R
FILTE R HOUSIN G
8. Instal l i n th e revers e orde r o f removal . Mak e sur e
tha t ther e is n o ai r leakage .
ProCarManuals.com

Heater Uni t
Replacemen t
SRS component s ar e locate d i n 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 ser -
vice.
1. Mak e sur e yo u hav e th e anti-thef t cod e fo r th e radio ,
the n writ e dow n th e frequencie s fo r th e radio' s pre -
set buttons .
2. Disconnec t th e negativ e cabl e fro m th e battery .
3 . Ope n th e cabl e clamp , the n disconnec t th e heate r
valv e cabl e fro m th e heate r valv e arm . Tur n th e heate r
valv e ar m to th e full y opene d positio n a s shown .
HEATE R VALV E AR M
CABL E CLAM P
HEATER VALV E CABL E
4. Whe n th e engin e i s cool , drai n th e engin e coolan t
fro m th e radiato r (se e sectio n 10 ).
D o no t remov e th e radiato r ca p whe n
th e engin e i s hot ; th e engin e coolan t i s unde r pres -
sur e an d coul d severel y scal d you . 5
. Disconnec t th e heate r hose s fro m th e heate r unit .
CAUTION : Engin e coolan t wil l damag e paint . Quickl y
rins e an y spille d engin e coolan t fro m painte d sur -
faces .
NOTE : Engin e coolan t wil l ru n ou t whe n th e hose s
ar e disconnected ; drai n it int o a clea n dri p pan .
HEATE R HOS E(INLE T SIDE )
CLAMP S
HEATE R HOS E
(OUTLE T SIDE )
6. Remov e th e dashboar d (se e sectio n 20 ).
7 . Remov e th e mountin g bolt s fro m th e lef t sid e o f
steerin g hange r beam .
8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
STEERIN G HANGE R BEA M
ProCarManuals.com

Heater Uni t
Replacemen t (cont'd )
8. Remov e th e mountin g bol t an d th e mountin g nut s
fro m th e righ t sid e o f th e steerin g hange r beam ,
the n remov e th e steerin g hange r beam .
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
STEERIN G HANGE R BEA M
8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
9. Remov e th e evaporator/blowe r uni t (se e pag e
22-65 ).
10. Remov e th e clip s an d th e heate r duct .
HEATE R DUC T
11. Remov e th e bol t an d th e cruis e contro l unit . Discon -
nec t th e connector s fro m th e mod e contro l moto r
an d th e ai r mi x contro l motor , the n remov e th e clip s
an d th e A/ C wir e harness . Remov e th e mountin g
bolt , th e mountin g nut s an d th e heate r unit .
CRUIS E CONTRO L UNI T
HEATE R UNI T
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
A/C WIR E HARNES S
12. Instal l i n th e revers e orde r o f removal . Mak e not e o f
the followin g items .
Apply sealan t t o th e grommets .
D o no t interchang e th e inle t an d outle t heate r
hoses.
Make sur e tha t th e clamp s ar e secure .
Refil l th e coolin g syste m wit h engin e coolan t
(se e sectio n 10 ).
Connec t th e heate r valv e cable , an d mak e sur e
tha t i t i s properl y adjuste d (se e pag e 22-72 ).
Mak e sur e tha t ther e is n o ai r leakage .
Th e PC M memor y mus t b e rese t afte r reconnect -
in g th e batter y (se e pag e 11-125 ).
Ente r th e anti-thef t cod e fo r th e radio , the n ente r
th e customer' s radi o statio n presets .
ProCarManuals.com

Overhaul

1. Remove the self-tapping screws and the vent/defroster

duct.

2. Remove the self-tapping screws and the pipe clamps.

3. Remove the self-tapping screws and the core clamp.
4. Pull out the heater core

NOTE: Be careful not to bend the inlet and outlet

pipes during heater core removal.

5. Assemble in the reverse order of disassembly.

VENT/DEFROSTER DUCT

CORE CLAMP

HEATER CORE
PIPE CLAMPSProCarManuals.com

Temperature Contro l
Adjustmen t
Heater valv e side :
1 . Ope n th e cabl e clamp , the n disconnec t th e heate r
valv e cabl e fro m th e heate r valv e arm .
CABL E CLAM P HEATE
R VALV E AR M
HEATE R VALV E CABL E
2.
3.
Tur n th e ignitio n switc h O N (II) . Se t th e temperatur e
contro l dia l o n MA X COO L wit h th e A/ C on .
NOTE : D o no t star t th e engine .
Tur n th e heate r valv e ar m to th e full y close d posi -
tio n a s show n above , the n attac h th e heate r valv e
cabl e t o th e heate r valv e arm . Hol d th e heate r valv e
arm in th e close d position , an d gentl y pul l o n th e
heate r valv e cabl e housin g t o tak e u p an y slack ,
the n instal l th e heate r valv e cabl e housin g int o th e
cabl e clamp . Heate
r uni t side :
1 . A t th e heate r unit , disconnec t th e heate r valv e cabl e
housin g fro m th e cabl e clamp , the n disconnec t th e
heate r valv e cabl e fro m th e temperatur e contro l
arm.
HEATE R VALV E CABL E
TEMPERATUR ECONTROL AR MCABL E CLAM P
STOP
2. Se t th e ai r mi x contro l moto r o n MA X COO L (se e
pag e 22-57 ).
3 . Attac h th e heate r valv e cabl e to th e temperatur e con -
tro l ar m a s show n above . Hol d th e en d o f th e heate r
valv e cabl e housin g agains t th e stop , the n sna p th e
heate r valv e cabl e housin g int o th e cabl e clamp .
ProCarManuals.com

A/C Servic e Tip s an d Precaution s
The ai r conditione r syste m uses HFC-134 a (R-134a) refrigeran t and polyalkyleneglyco l (PAG ) refrigeran t oil*, whic h are no t
compatibl e with CFC-1 2 (R-12) refrigeran t and minera l oil . Do no t us e R-1 2 refrigeran t or minera l oil i n thi s system , and d o
no t attemp t t o us e R-1 2 servicin g equipment ; damag e to th e ai r conditione r syste m o r you r servicin g equipmen t wil l result .
* DENS O ND-OI L 8
P/ N 38897-PR7-A01AH : 12 0 m ( 4 fl-oz , 4. 2 Imp-oz )
P/N38899-PR7-A01 : 4 0 m ( 1 1/ 3 fl-oz , 1. 4 Imp-oz )
Use onl y 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-134 a
from th e ai r conditione r 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 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 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 pressur e tes t R-134 a servic e equip -
men t o r vehicl e ai r conditione r 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 ca p th e 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 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 dischargin g th e system , us e a R-134 a refrigeran t recovery/recycling/chargin g station ; don' t releas e refrigeran t
int o th e atmosphere .
6 . Ad d refrigeran t oi l afte r replacin g th e followin g parts :
NOTE :
To avoi d contamination , d o no t retur n th e oi l t o th e containe r onc e dispensed , an d neve r mi x i t wit h othe r refriger -
an t oils .
Immediatel y afte r usin g th e oil , reinstal l th e ca p o n th e container , 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 vehicle ; i t ma y damag e th e paint ; i f th e refrigeran t oi l contact s th e paint , was h
it of f immediately .
When replacin g th e evaporato r pressur e regula -
tor , drai n th e oi l fro m th e remove d evaporato r
pressur e regulator , an d fil l th e ne w evaporato r
pressur e regulato r wit h th e sam e amoun t o f oil .
Condense
r ........................................30 m ( 1 fl-oz , 1. 1 Imp-oz )
Evaporato r ....................................... . 4 0 m (1 1/ 3 fl-oz , 1. 4 Imp-oz )
Lin e o r hos e ..................................... . 1 0 m (1/ 3 fl-oz , 0. 4 Imp-oz )
Receiver/Drye r ................................ . 1 0 m (1/ 3 fl-oz , 0. 4 Imp-oz )
Leakage repai r ................................ . 2 5 m (5/ 6 fl-oz , 0. 9 Imp-oz )
Compresso r ............................... . Fo r compresso r replacement , subtrac t th e volum e o f oi l draine d fro m th e
remove d compresso r fro m 14 0 m ( 4 2/ 3 fl-oz , 4. 9 Imp-oz) , an d drai n th e calculate d
volume o f oi l fro m th e ne w compressor : 14 0 m ( 4 2/ 3 fl-oz , 4. 9 Imp-oz ) — Volum e
o f remove d compresso r = Volum e to drai n fro m ne w compressor .
NOTE : Eve n i f n o oi l i s draine d fro m th e remove d compressor , don' t drai n mor e
than 5 0 m ( 1 2/ 3 fl-oz , 1. 8 Imp-oz ) fro m th e ne w compressor .
REMOVEDCOMPRESSO RNEWCOMPRESSO R
SAME LEVE LDRAININ GVOLUME140m ( 4 2/ 3 fl-oz , 4. 9 Imp-oz )
ProCarManuals.com

A/C Syste m Torqu e Specification s
EVAPORATOR PRESSUR E REGULATO R
SUCTION LIN E
EVAPORATO R
CONDENSE R LIN E
Discharg e hos e t o th e compresso r ( 6 x 1. 0 mm ) .................................................................... . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Discharg e hos e t o th e condense r ( 6 x 1. 0 mm)...................................................................\
.... . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Condense r lin e t o th e condense r ( 6 x 1. 0 mm ) .......................................................................\
. 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Condense r lin e t o th e receiver/drye r ( 6 x 1. 0 mm ) ................................................................. . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Receive r lin e A to th e receiver/drye r ( 6 x 1. 0 mm ) ................................................................. . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Receive r lin e A to th e condense r ( 6 x 1. 0 mm ) .......................................................................\
. 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Receive r lin e B to th e condense r ( 6 x 1. 0 mm)...................................................................\
..... . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Receive r lin e B to th e evaporato r ( 6 x 1. 0 mm ) .......................................................................\
. 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Suctio n lin e t o th e evaporato r ( 6 x 1. 0 mm ) .......................................................................\
.... . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Suctio n lin e to th e evaporato r pressur e regulato r ................................................................... . 3 1 N- m (3. 2 kgf-m , 2 3 Ibf-ft )
Suctio n hos e t o th e evaporato r pressur e regulato r ( 6 x 1. 0 mm ) ......................................... . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Suctio n hos e to th e compresso r ( 6 x 1. 0 mm ) .......................................................................\
. . 9. 8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
Compresso r t o th e oi l pa n ( 8 x 1.2 5 mm ) .......................................................................\
............ . 22N- m (2. 2 kgf-m , 1 6 Ibf-ft )
COMPRESSO R
SUCTION HOS E
DISCHARG E HOS E
RECEIVE R LIN E ARECEIVER/DRYE R
RECEIVER LIN E B
CONDENSE
R
ProCarManuals.com

A/C System Service

Recovery

Use only service equipment that is U.L.-listed and is cer-

tified to meet the requirements of SAE J2210 to remove

HFC-134a (R-134a) from the air conditioner system.

CAUTION: Exposure to air conditioner refrigerant and

lubricant vapor or mist can irritate eyes, nose and

throat. Avoid breathing the air conditioner refrigerant

and lubricant vapor or mist.

If accidental system discharge occurs, ventilate work

area before resuming service.

R-134a service equipment or vehicle air conditioner sys-

tems should not be pressure tested or leak tested with

compressed air.

Some mixtures of air and R-134a have been

shown to be combustible at elevated pressures and can

result in fire or explosion causing injury or property dam-

age. Never use compressed air to pressure test R-134a

service equipment or vehicle air conditioner systems.

Additional health and safety information may be obtained

from the refrigerant and lubricant manufacturers.

1. Connect a R-134a refrigerant recovery/recycling/

charging station to the vehicle, as shown, following

the equipment manufacturer's instructions.

2. Measure the amount of refrigerant oil removed from

the A/C system after the recovery process is com-

pleted.
RECOVERY/RECYCLING/CHARGING STATION

LOW-PRESSURE

SIDE

HIGH-PRESSURE

SIDE

NOTE: Be sure to install the same amount of new

refrigerant oil back into the A/C system before charg-

ing.ProCarManuals.com