1995 ACURA TL Service Repair Manual

Special Tool s
Ref. No.Too l Numbe r Descriptio
nQtyPag e Referenc e
*07JGG-001010 A
07SAZ-001000A
Belt Tensio n Gaug e
Backprob e Se t
22-7 8, 22-24a
22-42 , 22-45 , 22-4 6
Include d i n th e Bel t Tensio n Gaug e Set , 07TG G - 001000A .
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Illustrated Inde x
HEATER/EVAPORATOR/BLOWE R UNITHEATE R UNI T
Replacement , pag e 22-6 3
Heate r Cor e Replacement , pag e 22-6 5
EVAPORATO RReplacement, pag e 22-5 8
Overhaul , pag e 22-6 0
BLOWE R UNI T
Replacement , pag e 22-6 1
Overhaul , pag e 22-6 2
SERVIC E VALV E
(HIGH-PRESSUR E SIDE )
EXPANSION VALV E
Replacement , pag e 22-5 8
CONDENSE R
Replacement , pag e 22-7 9
A/ C PRESSUR E SWITC H
Whe n th e refrigeran t pressur e i s belo w 20 0 kP a (2. 0 kgf/cm
2,
2 8 psi ) du e t o refrigeran t leakag e o r abov e 3,20 0 kP a (3 2 kgf/cm2,45 5 psi ) du e to refrigeran t blockage , th e A/ C pressur e switc hopens th e circui t t o th e A/ C switc h an d stop s th e ai r conditionin gto protec t th e compressor .
SERVICE VALV E
(LOW-PRESSUR E SIDE )
COMPRESSO RReplacement, pag e 22-7 2
Clutc h Inspection , pag e 22-7 5
Clutc h Overhaul , pag e 22-7 6
Relie f Valv e Replacement , pag e 22-7 7
RECEIVER/DRYE R
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Wiring/Connector Location s
BLOWER MOTO R RELA Y
(Locate d o n th e under-das h rela y box )
Test , pag e 22-5 7 HEATE
R VALV E CONTRO L SOLENOI D
VALV E CONNECTO R
SUNLIGH T SENSO R
Replacement , pag e 22-5 5
Test , pag e 22-5 5
COMPRESSO R CLUTC H RELA Y
CONNECTO R
Wir e colors : WHT , RED ,
YEL/BLK , RED/BL U
Test , pag e 22-5 7
COMPRESSO R CLUTC H
CONNECTO R
A/ C PRESSUR E SWITC H
CONNECTO R
OUTSID E AI R TEMPERATUR E SENSO R
Replacement , pag e 22-5 4
Test , pag e 22-5 4
CONDENSE R FA N CONNECTO R CONDENSE
R FA N RELA Y CONNECTO R
Wir e colors : WHT , YEL/WHT ,
WHT/GRN, L T GRN/YE L
Test , pag e 22-5 7
RADIATO R FA N RELA Y CONNECTO R
Wir e colors : WHT , YEL ,
WHT/BL U an d L T GRN/YE L
Test , pag e 22-5 7
RADIATO
R FA N
CONNECTO RMAI
N WIR E
HARNES S
RADIATO R FA N CONTRO L MODUL E
(Locate d unde r righ t sid e o f dash )
Test , page , 22-4 8
NOTE : Refe r t o page 22-3a of the '96-9 8 Acura
3.2TL Servic e Manual supplement for the differences
on this page for the 3.2TL.
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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 .
RECIRCULATIO N CONTRO L MOTO R
Replacement , pag e 22-5 2
Test , pag e 22-5 2
MOD E CONTRO L MOTO R
Replacement , pag e 22-5 1
Test , pag e 22-5 1 AI
R MI X CONTRO L MOTO R
Replacement , pag e 22-5 0
Test , pag e 22-5 0
IN-CA R TEMPERATUR E SENSO R
Replacement , pag e 22-5 3Test, pag e 22-5 3 BLOWE
R MOTO R HIG H RELA Y
Test , pag e 22-5 7
BLOWE R MOTO R
CONNECTO R
POWE R TRANSISTO R
Test , pag e 22-5 6
CLIMAT E CONTRO L UNI T
Replacement , pag e 22-4 9
Bul b Replacement , pag e 22-4 9 EVAPORATO
R TEMPERATUR E SENSO R
Test , pag e 22-5 6
HEATE
R SUB-HARNES S
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Description

Outline

The air conditioner system removes heat from the passenger compartment by circulating refrigerant through the system

as shown below.

High-temperature/

high-pressure gas

Suction and compression
Radiation of heat
High-temperature/

high-pressure liquid

Traps debris,

and removes

moisture
High-temperature/

high-pressure liquid

COMPRESSOR

Less moisturized

low-pressure vapor
CONDENSER

Absorption of heat

EVAPORATOR
More liquidified

low-pressure vapor
RECEIVER/DRYER

EXPANSION VALVE

HEATER/EVAPORATOR/BLOWER
UNIT

CONDENSER
SUCTION LINE

COMPRESSOR

RECEIVER/DRYER

DISCHARGE LINE

This vehicle uses HFC-134a (R-134a) refrigerant which does not contain chlorofluorocarbons. Pay attention to the follow-

ing service items:

Do not mix refrigerants CFC-12 (R-12) and HFC-134a (R-134a). They are not compatible.

Use only the recommended polyalkyleneglycol (PAG) refrigerant oil (ND-OIL 8) designed for the R-134a compressor.

Intermixing the recommended (PAG) refrigerant oil with any other refrigerant oil will result in compressor failure.

All A/C system parts (compressor, discharge line, suction line, evaporator, condenser, receiver/dryer, expansion valve.

O-rings for joints) have to be proper for refrigerant R-134a. Do not confuse with R-12 parts.

Use a halogen gas leak detector designed for refrigerant R-134a.

R-12 and R-134a refrigerant servicing equipment are not interchangeable. Use only a Recovery/Recycling/Charging System

that is U.L.-listed and is certified to meet the requirements of SAE J2210 to service R-134a air conditioning systems.

Always recover the refrigerant R-134a with an approved Recovery/Recycling/Charging System before disconnecting

any A/C fitting.
RECEIVER LINE

CONDENSER LINEProCarManuals.com

Troubleshooting
Symptom Char t
For electrica l malfunction s whic h ar e indicate d b y th e self-diagnosti c system , refe r t o self-diagnosi s functio n (se e nex t
page) .
NOTE :
Check th e engin e coolan t level , an d allo w th e engin e t o war m u p befor e troubleshooting .
An y abnormalit y mus t b e correcte d befor e continuin g th e test .
Becaus e o f th e precis e measurement s needed , us e a multimete r whe n testing .
Befor e performin g an y troubleshootin g procedure s check :
— Fuse s * ' No . 1 7 (3 0 A) , *
1 No . 3 4 (2 0 A) , *1 No . 3 8 (2 0 A) , *1 No . 3 9 (1 0 A) , *2 No . 4 (*3), *2 No . 7 (7. 5 A) , *2 No . 8 (7. 5 A )
— Ground s No . G101 , G301 , G401 , G403 , G40 4
— Cleanlines s an d tightnes s o f al l connector s
*' : I n th e under-hoo d fuse/rela y bo x
*
2: I n th e under-das h fuse/rela y bo x
*3: No. 4 (1 5 A) : '9 5 an d '9 6 model s
: No. 4 (2 0 A) : '9 7 an d '9 8 model s
Sympto m
Check th e malfunctio n indicato r lam p (MIL) .
N o heate r an d A/ C in eithe r manual or AUT O modes .
Mod e contro l moto r doe s no t run , o r on e o r mor e mode s
are inoperative .
Recirculatio n contro l door s d o no t chang e betwee n FRES H
and RECIRCULATE .
Radiator fa n doe s no t ru n a t al l (bu t condense r fa n run s
with th e A/ C on) .
Condense r fa n doe s no t ru n a t al l (bu t radiato r fa n run s
with th e A/ C on) .
Both fan s (radiato r an d condenser ) d o no t ru n fo r engin e
cooling , bu t the y bot h ru n wit h th e A/ C on .
Bot h fan s d o no t ru n wit h th e A/ C on (2.5L) or at all (3.2L) .
Compresso r clutc h doe s no t engage .
A/ C syste m doe s no t com e o n (compresso r an d bot h fans) . Remed
y
Perfor m th e procedure s in th e flowchar t (se e pag e 22-28 ).
Perfor m th e procedure s in th e flowchar t (se e pag e 22-29 ).
Perfor m th e procedure s in th e flowchar t (se e pag e 22-30 ).
Perfor m th e procedure s in th e flowchar t (se e pag e 22-32 ).
Perfor m th e procedure s in th e flowchar t (se e pag e 22-34 , 2.5L) .
Perfor m th e procedure s i n th e flowchar t (se e pag e 22-37, 2.5L).
Perfor m th e procedure s in th e flowchar t (se e pag e 22-40 ).
Perfor m th e procedure s in th e flowchar t (se e pag e 22-41 , 2.5L) ( 22-18a, 3.2L).
Perfor m th e procedure s in th e flowchar t (se e pag e 22-43 ).
Perfor m th e procedure s i n th e flowchar t (se e pag e 22-46, 2.5L) (22-16a , 3.2L).
(see page 22-10a, 3.2L)
(see page 22-13a , 3.2L)
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Troubleshooting
Self-diagnosis Functio n
The climat e contro l uni t ha s a self-diagnosi s function .
Runnin g th e Self-diagnosi s Functio n
Tur n th e ignitio n switc h O N (II) , the n pres s bot h th e AUT O an d OF F button s a t th e sam e time . Whil e th e button s ar e
pressed , indicato r light s A , B , C , D , E an d F respectivel y wil l com e o n to indicat e a fault y component .
AUTO BUTTO NOFF BUTTO N
A
B
C
D
E
F
Indicator
ON
OF F
Componen t wit h proble m
In-car temperatur e senso r
Outsid e ai r temperatur e senso r
Sunligh t senso r
Evaporato r temperatur e senso r
Ai r mi x contro l moto r
Blowe r moto r Possibl
e caus e
Fault y sensor , ope n o r shor t circui t
Fault y sensor , ope n o r shor t circui t
Fault y sensor , ope n o r shor t circui t
Fault y sensor , ope n o r shor t circui t
Ope n o r shor t circuit , obstructe d door ,
fault y moto r
Ope n o r shor t circuit , fault y moto r Se
e pag e22-1 2
22-1 4
22-16
22-1 8
22-2 0
22-22 or 22- 24
(2.5L),
NOTE : I n cas e o f multipl e problems , th e respectiv e indicato r light s wil l com e on . I f indicato r light s A , B , C , D , an d E com e
o n a t th e sam e time , ther e ma y b e a n ope n in th e commo n groun d wir e o f th e sensors .
Resettin g th e Self-diagnosi s Functio n
Turnin g th e ignitio n switc h OF F wil l cance l th e self-diagnosi s function . Afte r servic e work , ru n th e self-diagnosi s functio n
onc e agai n to chec k tha t ther e is n o othe r problem.
D E F A, B , C
22-6a (3.2L)
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Climate Contro l Uni t Input/Outpu t Signal s
12P CONNECTO RCLIMAT
E CONTRO L UNI T CONNECTOR S
20 P CONNECTO R
WIR E SID E O F FEMAL E TERMINAL S
12P CONNECTO R
20 P CONNECTO R
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