1994 HONDA INTEGRA service

Heater and Air Conditioning
Heater ........ 21-1
Air Conditioning .......... ..22-1
SUPPLEMENTAL RESTRAINT SYSTEM {SRS}
The Integra SRS includes a driver's airbag, located in the steering wheel hub. In addition. all models except the
RS model for Canada have a front passenge.'s airbag located in the dashboard above the glovs box. Information
necessary to safely service the SRS is included in this Service Manual. ltems msrk€d with an asterisk (') on the
conlents page include, or are located near, SRS components. Servicing, disassembling or,eplacing thes€ items
will require special precautions and tools, and should therefore be done by an authorized Acura dealer.
a To avoid r6nd6dng tho SRS inoporativo. which could lead to personal injury or dealh in tho svont ot a sevele
frontal collision, all SRS servica work musl b€ portormed by an authorized Acura dealer.
a lmpropor sorvico procaduro3, including incorrect romoval and installatlon of tho SRS, could load to porsonal iniu-
ry causod by uninlonlional activation of tho ailbag8.
a All SRS eloctdcal widng harnossos are covored with yollow in3ulation. Relatsd compononts a.o locatod in tha
stsering column, flont console, daehboard, and dashboafd low6r pan6l, and in lhe dsshboa.d above lh€ glove
box. Do not uao electdcal tost equipmont on theae circuhs.
NOTE: The original radio has a coded theft protection circuit. Be sure to get the customer's code number beto.e
- disconnecting the battery.- removing the No. 32 (7.5 A) luse from the under-hood fuse/relay box.- removing the radio.
After service, reconnect power to the radio and turn it on. When the word "CODE" is displayed, enter the cus-
tomer's 5-digit code to restore radio operation.

lllustrated Index
CAUTION:
a All SRS electrical wiling harnesses are covered with
y€llow insulation.
a Bafore disconnecting any pan of the SRS wile har-
ness. connect the sholt connectorlsl.
a Replace the sntire aflected SRS halness assembly if
it has an open circuit or damaged wiring.
NOTE: The original radio has a coded thelt protection
circuit. Be sure to get the customer's code number before- disconnecting the battery.- removing the No. 32 (7.5 Al fuse lrom the under-
hood fuse/relav box.- removing the radio.
After service, reconnect power to the radio and turn it
on. when the word "CODE" is displayed, enter the cus-
tomer's 5-digit code to restore radio operation.
BLOWER UNITReplacement, page 21-2OOverhaul, page 21-21HEATER UNITRepfacement, page 2l 22Overhaul, page 21-24
RECIRCULATION CONTROL MOTORTest, page 21-29Replacement, page 21 29I{EATER VAIVE CABLEAdjustment, page 21-27
BLOWEN RESISTORTest, page 21-9
AIR MIX CONTROLCABLEAd,ustment, page 21-27Replacement. page 21-26
a/c swrTcH(wirh A/clTest, page 22-20
RECIRCULATIONCONTROL SWITCHTest, page 21-31
HEATER FANswtTcHTest, page 2'l-3O
MODE CONTROL MOTORTest, page 21-28Repfacement, page 21'28
MODE CONTROL SWITCHTest, page 21'31
HEATER CONTROL PANELRepf acement, page 21 -25
Overhaul, page 21-26
TEMPERATURE CONTROLLEVER(Adjustmonl: See AIR MIXCONTROL CABLE}
SRS MAIN HARNESS
W,
21-2
I

Heater Unit
Replacement
CAUTION:
a All SRS electrical witing hame$os are covoed wlth
yollow insulation.
a Before disconnecting any patt of tho SRS wito har-
neas, connect tha shott connoctol(s|.
a Roplaco th€ enlire sffacted SRS harnosr a$smbly if
it has an opon cilcult or dsmaged wiring.
NOTE: The original radio h8s a coded theft protection
circuit. Be sure to get the customer's code number betors
- disconnecting the bafterY.
- removing the No. 32 (7.5 A) fuse from th€ under-
hood tuse/relav box.- removing the radio
After service. teconnect power to the radio and turn it
on, when the word "CODE" is displayed, enter the cus-
tomer's 5-digit code to restore radio operation.
1. When the engine is cool, dtain the engine coolant
from the radiator (see section 1O).
@@ oo not lomove tho radiator cap whan
the ongine is hol; tha ongino coolant is undot
pressure and could a€voralY tcald you.
2. Snap open the clamp and disconnect the heater
valve cable from the heater valve arm.
HEATER VALVE CABLE
21-22
CLAMFS
3. Disconnect the heater hoses from the heater unit'
CAUTIOII: Engino coobnt will damago paint. orick-
ly dnse any rpilled engine coolant from paintod
surfac63.
NOTE: Engine coolant will tun out when the hoses
are disconnected, drain it into a clean drip pan'
HEATER HOSES
Remove the mounting nut from the heater unit.
NOTE: When removing the mounting nut, take care
not to damage or bend the fuel pipes, brake pipes,
etc.
8 r 1,25 rn|n22 N.m 12.2 kgt.m, tO lbf'ftl
4.

Air Conditioning
*Evaporator
Repf acement .........22-26
Overhauf ................ 22-27
Compressor
Description ............ 22-28
fffustrated fndex ............................... 22-29
Replacement .........22-30
Cf utch lnspection ....................... ...... 22-32
Cf utch Overhaul ............................... 22-33
Ref ief Vaf ve Replacement ............... 22-34
A/C Compressor Belt
Repf acement .........22-35
Adiustment ............22-36
Condenser
Replacement ......... 22-37
A/C System Service
Evacuation ....,.......,22-38
Charging ................ 22-39
Leak Test ...............22-40
+: Read SRS precautions before working in
this area.

lllustrated Index
CAUTION:
. All SRS electrical wiring harnossos are cover€d withyellow insulation.
. B€fors disconnacting any part of the SRS wire har-ness, connsct the 3hort connsctor(s).. Replace the entirs affscted SRS harness assembly itit has an open circuit or damaged wiring.
NOTE; The original radio has a coded theft protection
circuit. Be sure to get the customer's code number
before- disconnecting the battery.- removing the No.32 (7.5 A) fuse from the under-
hood fuse/relay box.- removing the radio.
After service, reconnect Dower to the radio and turn it
on. When the word "CODE" is displayed, enter the cus-
tomer's 5-digit code to restore radio operation.
SRS MAIN HARNESSlcover€d with yellow insulationl
EVAPORATORReplacement, page 22-26Ovethaul. Oase 22.27
SERVICE VALVE(LOW PRESSURE SIDEI
SERVICE VALVEIHIGH PRESSURE SIDE)
RECEIVER/DRYER
CONDENSERReplacement, page 22,37
A/C PRESSURE SWITCHCOMPRESSORReplacement, page 22-30When the refrigerant pressure is below 200 kpa (2.0kqflcm,,28 psi) due to refrigerant leakage or above 3]OOkPa (32 kgf/cm,, 460 psi) due to coolant btockage, the A,/Cpressure switch opens the circuit to the A"/C switch andstops the air conditionang to protect the compressor.
22-3

Description
Outline
The air conditioner system delivers cooled air into the passenger compartment by circulating refrigerant through the sys-
tem as shown below.
CONDENSOR
This car uses HFC-134a {R-134a) refrigerant which does not contain chlorofluorocarbons Pay attention to the following
service items:
. Do not mix refrigerants CFC-I2 (R-l21 and HFC-134a (R-134a) They are not compatible'
. Use onty the recommended potyatkytenegtycol {PAG) refrigerant oil (ND-OIL 8: P/N 38899-PR7-A01) designed for the R-
134a compressor. Intermixing the recommended (PAG) refrigerant oil with any other refrigerant oil will result in com-
pressor tailure.
.A||lvcsystemparts(compressor.dischargeIine,suotionIine,evaporator,condenser.receiver/dryer,expansionva|ve.
o-ringsforioints}havetobeproperforre'rigerantR-l34a.DonotconfusewithR.l2parts.
. Use a halogen gas leak detector designed for refrigerant R-134a'
. R-.12 and C-l34a refrigerant servicing equipment are not interchangeable. Only use a Recovery/Recyclins/Charging
System that is U.L.-listed and is certifLd to meet the requirements of sAE J2210 to service R-134a air conditioning sys-
rems.
. Always recover the refrigerant R-134a with an approved Recover/Recycling/Charging System before disconnecting any
A,/C fitting.
coMpRESsoR -coNDENSER - RECEIVER/DRYER
High temperature/
high pressure gas
Suction and comPression
Less moisturized
low pressure vaPor
High temperature/ Traps debris High temperature/
hilh pressure liquid and removes high pressure liquid
Radiation of heat molsture
More liquidified
low Pressure vaPor
Absorption of heat
EVAPORATOR <-'----------.- EXPANSION VALVE
EVAFORATOR
22-6

A/C Service Tips and Precautions
The air conditioner system uses HFC-134a (R-134a) .efrigerant and polyalkyleneglycol (PAG) retrigerant oil (ND-OIL g: p/N
38899 - PR7 - A0l ), which are not compatible with CFC-12 \R-'12) refrigerant and mineral oil. Do not use R-12 refrigerant ormineral oil in this system, and do not attempt to use R-'12 servicing equipment; damage to the air conditioner system oryour servicing equipment will result.
only use service equipment that is u.L,-listed and is certified to meet the requirements of sAE J2210 to remove R-134afrom the air conditioner svstem.
CAUTION: Exposure lo air conditioner refrigorant and lubricanl vapor or mi3t cln irritato gyos, nose and throat. Avoidbreathing lhe air conditioner refrigerant and lubricant vapor or mist.
lf accidental system discharge occurs, ventilate work area befor€ resuming service.R-134a service equipment or vehicle air conditioner systems should not be pressure tested or leak tested with compressedair.
@ some mirtures of air and R-l3ifa have been 3hown to be combu3tible at slsvated prossuros and can relultin fire or explosion causing inlury or property damage. Never use complessod ai. to prgssure t€|st R-134a service equip-ment or vehicle air conditiongr systems.
Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.'1. Always disconnect the negative cable from the battery whenever replacing air conditioning pans.
2. Keep moisture and dust out of the system. When disconnecting any lines, plug or cap the fittings immediately; don'tremove the caps or plugs until just before you reconnect each line.
3. Before con necting a ny hose or line, apply a few drops of refrigerant oil (ND-OIL 8: P/N 38899 - PR7 - AO1) to the O-ring.4. When tightening or loosening a fitting, use a second wrench to support the matching fitting.5. When recovering the system, use a R-134a refrigerant Recovery/Recycling/Charging System; don't release refrigerantinto the atmosDhere.
6. Add refrigerant oil (ND-OlL 8: P/N 38899 - PR7 - A01) after replacing the following parts:
NOTE:
. To avoid contamination, do not return the oil to the container once dispensed, and never mix it with other refriqer-ant orls.
. lmmediately after using the oil, replace the cap on the container and seal ittoavoid moisture absorption,. Do not spill the refrigerant oil on the car; it may damage the paint; if the re{rigerant oil contacts the paint, wash itoff immediately.
Condenser ..................... 25 m/ (5/6 fl.oz, 0.9 lmp.oz)
Evaporator ................. ilo mf 17 113fl.oz,1.4 lmp.oz)
Line or hose 10 ml (1/3 fl.oz. o.il lmp'ozl
Receiver/Dryer .....,.,,...., 10 m{ l1l3 tl.oz, 0.4 lmp.ozl
Leakage repair .............. 25 mf (5/6 fl.oz, 0.9 lmp.ozl
Compressor For compressor .eplaco-
m€nt, subtract the volumo of oil drained from tho
removed compressor trom 140 ml 11 213 ll.oz, 1,9
imp.ozl, and drain the calculalgd volume of oil from
tho new compressor: 140 mf 11 213 ll. oz, 1.9
imp.ozl- Volume ot removod compressor = Volume
to drain from n€w compressor.
NOTE: Even if no oil is drained from the removed
compiessor, don't drain more than 50 ml 11 213
fl.oz, 1.8 lmp .oz) from the new comDressor.
O Dischargo hose to the compresso. (6 x 1.0 mml .............................. 9.8 N.m {1.0 kgt.m, 7.2 lbf.ft)(, Discharge hosa to ths condenser (6 x 1.0 mm) . 9.8 N.m {1.0 kgf.m, j.Z lbl.ftl@ Condenser pipe to tho condenser (6 x 1.0 mml 9.8 N.m n.O kaf.m,t-2tbl.ftl
@ Condenser pipe to the receiver/dryer (6 x 1.0 mm) ......................... 9.8 N.m (1.0 katm,7.2 lbf.ft)@ Receiver pipe A to tho receiver/dryer 16 x 1.0 mm) ......................... 9.8 N.m (1.0 kttm. 7.2 lbt.ft)@ Receiver pipe A to th6 receiver pipe B ......................................
O Receiver pipe B to the receiver pipe C .............................................. 13 N.m {1.3 kgt.m. 9.4 lbt'ft)
13 N.m {1.3 kgf.m.9.4 lbf'ft)@ Receiver pipe C to the evaporator (6 x 1.0 mm) 9.8 N.m {1.0 kgf.m , j.Zlbl.ftl
@Suaion pip€ B to the evaporator {6x 1.0 mm) ................ ................ 9.8 N.m tt.O t!f.-, r.Z tUt tt}@ Sustion pipe A to the suction pipe B .................. 3t N.m (3.2 klnm,23 lbf.ft)(, Suction hose lo the suction pipe A ................ ...... 31 N.m (3.2 kgf.m, 23 tbf.ftl
OA Suction hose to the compressor {5x 1.0 mm} ................ ................. 9.8 N.m 11.0 kgt.m,7.2 lbf.ft)
ET
22-21

A/C System Service
Recovery
Onlv use 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: Expo3ute to air conditioner rcfrigelant rnd
lubricant vapor or mist can irritatc oyo!, no3o and
throat. Avoid bresthing the lir condhionot rofrigorlnt
and lubricant vapor or misl.
lf accidental system discharge occuts, 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
comoressed air.
!!@ some mixturos ot Eir and R'134. hsvc
bsen shown to be combu3tible st elavllcd prs33urc3
and can result in fire or oxplosion cau3ing iniurY or
property damage, Nsvor u36 comprg3Sod lir to P|'3turl
test R-134a servic€ equipmont o. vohiclc rir condhioncr
3ystems.
Additional health and safety information may be
obtained from the refrigerant and lubricant manufac-
rures.
'1. Connect a R-134a refrigerant Recovery/Recycling/
Charging System to the car, 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
comoleted.
NOTE: Be sure to install the same amount of new
refrigerant oil back into the A/C system befote
charging.
R.cov.rylR.cycling/Ch.rging sy.t m.
Pf,ESSUFE
22-22