1999 HONDA CR-V Air condition

a
Heater and Air Conditioning
Heater ...........21
NOTE: Section 21 ("Heater") is included in section 22.
Air Conditioning ......'..'.. '.'22'1
SUPPLEMENTAL RESTRAINT SYSTEM (SRS}
This model has an SRS which includes a driver's airbag in the steering wheel hub, a passenger's airbag in the dashboard
above the glove box ('97,00 models). and seat belt tensioners in the seat belt retractors ('98 - 00 models). Information
necessary to safely service the SRS is included in this Service Manual. ltems marked with an asterisk (*) on the contents
page include. or are located near, SRS components. Servicing, disassembling or replacing these items will require special
precautions and tools, and should only be done by an authorized Honda dealer.
@. To avoid rendering the SRS inoperative, which could lead to personal iniury or death in the event of 8 severe frontal
collision, all SRS service work must be performed by an authotized Honda dealer.
lmproper service procedures, including incorrect removal and installation of the SRS, could lead to personal iniury
caused by unintentional deployment of the airbags ('97 - 00 models), and seat belt tensioners 138 - 00 models).
Do not bump the SRS unit. Otherwise, the system may fail in case of a collision, or the airbags may deploy when the
ignition switch is ON {lll.
SRS eleqtrical wiring harnesses are identified by yellow color coding. Related components are located in the steering
column, front console, dashboard, dashboard lower panel, and in the dashboard above the glove box. Do not use elec-
tricaltest equipment on thes€ cilcuils.
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Air Conditioning
Heater Control Panel
Reofacement ,.,...,,.,..,.,.,,22-46
Blower Unit
Replacement .................. 22-46
Overhaul ...........,,,., .......-.22-17
Evaporalor
ReDlacement ...,.,.,..,......,22-4A
Overhaul ................ .........22-19
A/C Filter
Replacement ..................22-50*Heater Unit
ReDfacement ..................22-50
Overhaul ..,.,..,.,...,.. .........22-52
Temperature Control
Adiustment ....................22-53
A/C Service Tips and Precauiions............-....-.... 22-54
A/C System Torque Specifications .................... 22-55
A/C System Service
Performance Test ......,...22-56
Pressure Test Chart .-.....22-5a
Recovery ..............,. ...-.-...22-59
Evacuation -...........-........22-60
Charging ................ .......-.22-61
Leak Test ........................22-61
Compressor
Repfacement ..........-.......22-62
flfustrated Index .....,.......22-64
Cfutch fnspection .........,.22-65
Cfutch Overhaul ............- 22-66
Thermaf Protector Rep|acement ................... 22-68
Refief Valve Replacement .............................. 22-68
A/C Comoressor Belt
Adiustment .................... 22-69
Condenser
Repfacement .,.....,,.,..,.,..22-70
'Read SRS precautions betore working in this area.
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Component Location
lndex
EVAPORATORReplacement, page 22-48Overhaul, page 22-49
SERVICE VALVEILOW-PRESSURE SIDE}
CONDENSERReplacement, page 22-70
A/C PRESSURE SWTTCHWhen the refrigorant pressure is below 200 kPa 12.0 kglc.r|r,28 psi) or abov€ 3,200 kPa (32 kgflcmr, 455 psi), the AJC pressureswitch opens the circuit to the Ay'C switch and stops the airconditioning to protect the compressor.
Replacement, page 22-62Clutch Inspection, page 22-65Clutch Overhaul, pago 22-66Thermal Protector Replacement, page 22-68Relief Valve Replacem€nt. page 22-68
SERVICE VALVEIHIGH-PRESSURE SIDEI
,
[\,
-il
(cont'd)
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Description
The air conditioner system removes heat from the passenger compartment by circulating refrigerant through the systemas shown below.
High'temperature/ High-temperature/
high-pressure gas h igh-pressure liquid
Suction and compression Radiation of heat
High-temperature/
high-pressu re liq uidr raps oeons,
and removes
motsture
More liquidified
row-pressure vapor
EVAPoRAToR (-l EXPANSToN vAL
SUCTION LINEtLow-PRESSURE S|OEt
LIOUID LINE
CONDENSER
coMpREssoR Il- coruoerusenl* necetve
Less moisturized
low-pressure vapor
Absorption of heat
DISCHARGE LINEIHIGH.PRESSURE SIDEI
This vehicle uses HFC-I34a (R-l34a) refrigerant which does not contain chlorofluorocarbons. Pay attention to the follow-ing service items:
. Do not mix refrigerants CFC-12 (R-12) and HFC-l34a (R-134a). They are not compatible.. Use only the recommended polyalkyleneglycol (PAG) refrigerant oil (SP-10) designed for the R-134a compressor.Intermixing the recommended (PAG) refrigerant oil with any other refrigerant oil will result in compressor failure.. Afl Ay'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 stationthat is U.L.iisted and is certified to meet the requirements of SAE J2210 to service R-134a air conditioning system.. Always recover the refrigerant R-134a with an approved recovery/recycling/charging station before disconnecting anylVC fitting.
EVAPORAYOR
22-7
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A/C Service Tips and Precautions
The air conditioner system uses HFC-'134a (R-134a) refrigerant and polyalkyleneglycol {PAG) refrigerant oil*, which are not
compatible with CFC-12 (R-12) refrigerant and mineral oil. Do not use R-12 refrigerant or mineral oil in this system, and do
not attempt to use R-12 servicing equipmenu damage to the air conditioner system or your servicing equipment will
resutr.
*KEIHIN SP-10:
. P/N 38897 - Pl3 - A01AH: 120 m{ (4 fl.oz, il.2 lmp.oz)
. P/N 38899 - Pl3 - A01: 40 mf 11113tl.oz,1.4 lmp.oz)
Use only service equipment that is U.L.-listed and is certified to meet the requirements of SAE J2210 to remove R-134a
from the air conditioner system,
CAUTION: Exposure to air conditioner refrigerant and lubricant vapor or misl can irritats 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 systems should not be pressure tested or leak tested with compressed
air.
E@ Some mixtures of air and R-13,1a have been shown to be combustible at elevat€d pressures and can result
in fire or explosion causing iniury or property damage. Never use complessed air to pressure test R-l3,[a service equip-
ment or vehicle air conditioner 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 parts.
2. Keep moisture and dust out of the system. When disconnecting any lines, plug or cap the fittings immediately; don't
remove the caps or plugs until just before you reconnect each line.
3. Before connecting any hose or line. apply a few drops of refrigerant oilto the O-ring,
4. When tightening or loosening a fitting, use a second wrench to support the matching fitting.
5. When discharging the system, use a R l34a refrigerant recovery/recycling/charging station; don't release refrigerant
into the atmosphere.
6. Add refrigerant oil after replacing the following parts.
Note these items when handling refrigerant oil:
o To avoid contamination, do not return the oil to the container once dispensed, and never mix it with other refriger-
ant oils.
. lmmediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.
. Do not spill the refrigerant oil on the vehicle; it may damage the painu if the refrigerant oil contacts the paint, wash
it off immediately.
Condenser . 25 ml (5/6 tl.oz, 0.9 lmp.oz)
Evaporator.,................................40 m/ 11 113ll.oz,l.4 lmp.ozl
Line or hose ........... 10 ml (1/3 fl.oz, 0.4 lmp.oz)
Receiver/Dryer....... 10 ml (1/3 fl.oz, 0.4 lmp.oz)
Leakage repair............................ 25 m/ (5/6 ll.oz, 0.9 lmp.oz)
Compressor.......,..., For compressor replacement, subtract the volumg ol oil drained from the removed
compressor from 130 m{ (4 113 tl.oz, 1,6lmp.ozl, and drain the calculatsd volume of
oif from the now comprossor: 130 ml (,1 113 tl,oz, 1.6lmp'ozl - Volume of removed
compressor = Volume to drain from new compressor.
NOTE: Even if no oil is drained trom the removed compressor, don't drain more than
50mt 11 213ll,oz,1.8 lmp.oz) from the newcompressor.
22-54I
rso m r rr:0.o., r.s r-o.o.t
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A/G System Service
Performance Test
The performance test will helD 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 condiiioner r€trigerant and
lubricant vapor or mist can irritate €yes, nose and
throat. Avoid bre8thing the air conditioner retrige.ant
and lubricant vapor or mist,
lf accidental system discharge occurs. ventilate work
area before resuming service.
R-134a service equipment o. vehicle air conditioner sys-
tems should not be pressure tested or leak tested with
comDressed air.
@ some mixtur€s ol air and R-134a have becn
shown to be combuslible at olsvated pressures and can
result in lire or explosion causing iniury or property
damage. Never use compressed air to prgssure test R-
13i[a service equipment or vehicle air conditioner sys.
tems.
Additional health and safety information may be obtained
from the refrigerant and lubricant manufacturers.
Recovory/Recycling/charging station
LOW.PRESSURESIDE
1.Connect a R-134a refrigerant recover/recycling/
charging station to the vehicle, as shown. following
the equipment manufacturer's instructions,
Insen a thermometer in the center air vent. Determine
the relative humidity and air temperature.
Test conditions:
. Avoid direct sunlight.
o Open hood.
. open front doors.
. Set the temperature control dial on MAX COOL,
the mode control dial on VENT and the reci.cula-
tion control switch on RECIRCULATE.
. Turn the A,/C switch on and the 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 deliverv
temperature from the thermometer in the dash vent
and the high and low system pressure from the Ay'Cgauges.
2.
22-56
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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 brqathing the air conditioner retrigerant
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 plessures and can
result in fire or explosion causing iniury or property dam-
age. Never use compressed air to pressure tect R-134a
service equipment or vehicle air conditioner systems.
Additional health and safety intormation may be obtained
from the refrigerant and lubricant manufacturers.
'1. Connect a R-134a refrigerant recove rylrecycling/
charging station to the vehicle, as shown, following
the equipment manufacturer's instructions
2. Measure the amount of refrigerant oil removed trom
the A,/C system after the recovery process is com-
oleted. Be sure to install the same amount of new
refrigerant oil back into the AVC system before charg-
inq.
Recovery/Recycling/Charging Station
22-59
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A/C System Service
Evacuation
Use only service equipment that is U.L.-listed and is cer-tified to meet the requirements of SAE J2210 to removeHFC-134a {R-134a)from the air conditioner system.
CAUTION: Exposure to air conditioner refrigerant andlubricant vapor or mist can irrhate eyes, noso and throat.Avoid breathing the air condhioner retrigerant and lubri-cant vapor or mist.
lf accidental system discharge occu.s. ventilate workarea before resuming service.
R 134a service equipment or vehicle air conditioner sys-tems should not be pressure tested or leak tested withcompressed arr.
!@ some mixtures of air and R-134a hsvo beenshown to be combustible at elevated pressures and canresult in tire or explosion causing iniury ot property
damage. Never use compressed air to pressure test R-134a service equipment or vehicle air conditioner svs-tems.
Additional health and safety information may be obtainedfrom the refrigerant and lubricant manufacturers.
1, When an A,/C System has been opened to the atmo-
sphere, such as during installation or repair, it must
be evacuated using a R-l34a refrigerant recovery/
recycling/charging station. {lf the system has beenopen for several days, the receiver/dryer should bereplaced, and the system should be evacuated forseveral hours.)
Connect a R-134a refrigerant recovery/recyclin g/
charging station to the vehicle, as shown, following
the equipment manufacturer's instructions.
Evacuate the system,
lf the low-pressure does not reach more than 93.3kPa (700 mmHg,27.6 in.Hg) in 15 minutes, there isprobably a leak in the system. partially charge thesystem, and check for leaks (see Leak Test).
Recovery/Recycling/Charging Station
22-60
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