1998 HONDA INTEGRA Workshop Manual

J
Pressure Test Chart
Performance Test on page 22.24.
TEST RESULTSRELATED SYMPTOMSPROBABLE CAUSEREMEDY
Discharge (highlpressure
abnormally high
After stopping compressor, pressure
drops about 200 kPa (2.0 kgflcm',28psi) quickly, and then falls gradually.
Air in systemRecover, evacuate and rechargewith specified amount.Evacuation: see pag€ 22-38Charging: see page 22-39
Reduced or no air tlow throughconoenser.
. Clogged condenser orradiator fins. Condenser or radialor fannot working proPerly
CleanCheck voltage and fan rpmCheck fan direction
Line lo condenser is excessively hot.Restricted flow of felrigerantin systemRestricted lines
Dischargepressureabnormally low
High and low pressures are balancedsoon after stopping compressor. Lowside is higherthan normal.
. Faulty compressordischarge valve. Faulty compressor seal
Replace the compressor.
Outlet of expansion valve is notfrosted, low pressure gauge
indicates vacuum.
. Faulty expansion valve. lvloisture in system
. Replace. Recover, evacuate and rechargewith specified amount.
Suction (low)pressure
abnormally low
Expansion valve is not frosted andlow-pressure line is not cold. Lowpressure gauge indicates vacuum.
Frozen expansion valveFaulty expansion valveReplace the expansion valve.
Discharge temperature is low and theairflow from vents is restricted.Frozen evaporatorRun the fan with compressor off,then check A,/C thermostat.
Expansion valve is frosted.Clogged expansion valveClean or replace.
Receiver/dryer outlet is cool and inletis warm (should be warm duringoperal|onJ.
Clogged receiver/dryerReplace
Suctionpressureabnormally high
Low-pressure hose and seryicevalve are cooler than the temPera-ture around evaporator.
Expansion valve open toolongLoose expansion capillarytube
Repair or replace.
Suction pressure is lowered whencondenser is cooled by water.Excessive refrigerant insystemRecover. evacuate and rechargewith specified amount.
High and low pressure are equalizedas soon asthe compressor asstopped, and both gauges fluctuatewhile running.
Faulty gasket
Faulty high-pressure valveForeign panicle stuck in highpressure valve
Reolace the comDressor.
Suction and dis-charge pr€ssuresabnormally high
Reduced air flow throughcondenser.
. Clogged condenser orradiator fins. Condenser or radiator lannot working properly.
Clean condenser and radiatorCheck voltage and fan rpmCheck fan direction
No bubbles in sight glass whencondenser is cooled bv water.Excessive refrigerant in systemRecover. evacuate and rechargewith specified amount.
Suction anddischargepfessure
abnormally low
Low-pressure hose and metal endareas are cooler than evaDorator.Clogged or kinked lowpressure hose partsRepair or replace.
TemP€rature around expansionvalve is too low compared with thataround receiv€r/dryer.
Clogged high-pressure lineRepair or replace.
RetrigerantleaksCompressor clutch is dirty.Compressor shaft seal leakingReplace the compressor.
Comoressor bolt(s) are dirty.Leaking around bolt(s)Tighten bolt{s) or replacecompressor.
Compressor gasket is wet with oil.Gasket leakingReolace the comoressor.
22-23

A/C System Service
Performance Test
The performance test will help determine if the air con,
ditioner system is operating within specifications.
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 svstem.
CAUTION: Exposure to air conditioner retrigerant and
lubricant vapor or mist can irritate eyes, nose and
throat. Avoid breathing the air conditioner refrigerant
and lubricant vapor or mist.
lf 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 arr.
@ some mixtures of air and R-134a have
been shown to be combustible at elevated Dressures
and can result in fire or explosion causing iniury orproperty damage. 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 manufactur-
ers.
Connect a R-134a refrigerant Recovery/Recycling/
Charging System to the vehicle, as shown, follow-
ing the equipment manufacturer's instructions.
Insen a thermometer in the center vent outlet.
Determine the relative humidity and air tempera-
IUre.
Test conditions:
. Avoid direct sunlight.
. Open hood.
. Open lront doors.
. Set the temperature control lever to MAX COOL,
the mode control switch on VENT and the recir-
culation control switch on RECIRCULATE.. Slide the heater fan switch on MAX.. Run the engine at 1.500 rpm.. No driver or passengers in vehicle.
After running the air conditioning for'10 minutes
under the above test conditions, read the delivery
temperature from the thermometer in the dashvent, and the high and low system pressure from
the A,/C gauges.
Recovo.v/Recycling/Charging System.
LOW.PRESSURE
l
22-24

JTo complete the chansl
. Mark the delivery temperature along the venical line.
. Mark the intake temperature (ambient air temperature) along the bottom lane.
. Draw a line straight up from the air temperature to the humidity.
. Mark a point one line above and one line below the humidity level (10 % above and 10 % below the humidity
level).
. From each point. draw a horizontal line across the delivery temperature.
. The delivery temperature should fall between the tlvo lines.
. Complete the low side pressure test and high side pressure test in the same way
. Any measurements outside the line may indicate the need for further inspection.
kpalkst/cm')tpsil2900t30)I4:'01
250{)t25)t3601
2000{20}I28ol
80 70
30%rp.lkgf/cm'llpsilDELIVERYPRESSURE
OEL|vENYPRESSURE
1500{151t2101
980{10)I14ol
INTAKEPRESSURE
11t5l
DELIVERYTEMPERATURE
INTAKE TEMPERATURE
22-25

Evaporator
Replacement
Cut the dashboard insulato. at the areas shown.
Disconnect the connector from the A,,/C thermostat.
and remove the wire harness clips from the evapo-
rator.
6 x 1.0 rnm9.8 N.m 11.0 kgf.m,7.2 tbl.ft)
EVAPOBATOB
7. Remove the four self-tapping screws. the mounting
bolt and the mounting nut.
8. Disconnect the drain hose, and remove the evapo-
rator.
9, Install in the reverse order of removal, and:
. if you're installing a new evaporator, add refrig-
erant oil (ND-OlL 8: PiN 38897 - PR7 - A0IAH or
38899 - PR7 - A0 I I lsee page 22-21) .. replace the O-rings with new ones at each fitting,
and apply a thin coat of refrigerant oil before
installing them.
NOTE: Be sure to use the right O-rings tor HFC-
134a (R-134a) to avoid leakage.
. apply sealant to the grommets.
. make sure that there is no air leakage.. charge the system (see page 22-39) and test itsperformance {see page 22-24l.
CLIPS
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section {23) before performing repairs or ser-
vice.
1. Recover the retrigerant with a Recovery/Recycling/
Charging System \see page 22-221.
2. Remove the bolts, and disconnect the receiver line
and the suction line from the evaporator.
NOTE: Plug or cap the lines immediately after dis-
connecting to avoid moisture and dust contamina-
UOn.
6x1.0mm9.8 N.m 11.0 kgf.m,1.2 tbi.ft)
Remove the glove box (see section 20).
Remove the four bolts and the glove box frame.4.
SUCTION LINE
RECEIVER LINE
22-26

J
Overhaul
Pull out the A,/C thermostat sensor from the evapo-
rator fins.
t
I
ir
I
Remove the self-tapping screws and clamps from
the housing.
3. Carefully separate the housings and remove the
evaporator.
4. lf necessary. remove the expansion valve.
NOTE: When loosening the expansion valve nuts,
use a second wrench to hold the expansion valve or
evaporator pipe. Otherwise, they can be damaged.
Assemble in the reverse order of disassembly.
Make note ot these items:
Replace the O-rings with new ones at each fit-
ting, and apply a thin cost of retrigerant oil (ND-
OIL 8: P/N 38897 - PR7 - A01AH or 38899 - PR7 -
A01) before installing them.
NOTE: Be sure to use the right O-rings for HFC-
134a (R-134a) to avoid leakage.
Install the expansion valve capillary tube with
the capillary tube in contact with the suction line
directly, and wrap it with tape.
Reinstall the Ay'C thermostat sensor to its original
location.
TAPEReplace.Make sure there is no foreign matter stuck between
tEVAPORATORblow dirt out of tinswith compressed alr'8 N.m {0.8 kgt'm.6 rbf.ftl
CAPILLARY TUBE
EXPANSION VALVE
24 N.m (2.{ kgtm.17 rbf.ftl
UPPER HOUSING
%
6th tin f.om outlet sido
A/C THERMOSTATTest, page 22'19
EVAPORATOR LID
22-27

This compressor is a Nippondenso piston type compressor for HFC-134a (R-134a). A revolving inclined disc drives the sur-rounding 10 reciprocating pistons. As the inclined disc revolves, it pushes the pistons, ,protected by a ceramic shoe, thuscompressing the refrigerant.
FIELD COIL
ar:o@
o-> @ ______-__> o,_______> @
r____________l
Compressor
Description
\
22-28

lllustratedlndex
CLUTCHSETlnspection,Page 22-32
SNAP RING AReplace.
FIELD COILInspection, page 22-32
I / COMPRESSOR COMPLETE
.-- lDo not disassemble)
SUCTION SERVICE VALVEO.RINGReplace.
I
S..-
VX
I
I ^.-{\
I.ory
O.RINGReplace.RELICF VALVER€placement. page 22-34
22-29

Compressor
Replacement
lf the compressor is marginally operable, run the
engine at idle speed, and let the air conditioner
work a few minutes. Then shut the engine off.
Recover the refrigerant with a Recovery/Recycling/
Charging System \see page 22-22).
Remove the power steering pump (see section 17).
NOTE: Do not disconnect the hoses from the power
steering pump.
Disconnect the condenser fan connector.
Disconnect the compressor clutch connector, then
remove the compressor clutch connector and the
clips from the condenser fan shroud
Remove the two mounting bolts and the condenser
fan shroud.
NOTE: Be careful not to damage the radiator fins
when removing the condenser fan shroud.
1.0 mmN.m (1.0 kgt.m,rbf.ftt
CONDENSER FAN SHROUD
COMPRESSOR CLUTCH CONNECTOR
5. Remove the bolts, then disconnect the suction line
and the discharge line from the compressor.
NOTE: Plug or cap the lines immediately aiter dis-
connecting to avoid moisture and dust contamina-
tio n.
6x1.0mm9.8 N.m (1.0 kgf.m, 7.2 lbf.ft)
22-30
6. Loosen the adjusl pulley bracket pivot bolt and the
adjusting bolt, then remove the A/C compressor
belt from the Dullev as shown.
ADJUSTING BOLT
A/C COMPRESSOR BELT
Remove the four mounting bolts and the compres-
sor.
NOTE: Be careful not to damage the radiator fins
when removing the compressor.
7.
./.,
COMPRESSOR