Section 23 HONDA CR-V 2000 RD1-RD3 / 1.G Workshop Manual

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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Component Location
lndex (cont'dl
SRS components are located in this area. Review the SRS component locations, precautions, and procedures in the SRS
section (24) before performing repairs or service.
BLOWER UNITReplacement, page 22-46Ovethaul, page 22 47
/alowen ruoronl
\Test, page 22-16 /
EVAPORATORFeplacement, page 22-48Overhaul, page 22,49
RECIRCULATIONCONTROL MOTORReplacement, page 22 42
HEATER UNITReplacement, page 22 50Overhaul, page 22 52
lest, pag.e 22 42
A/C FILIERReplacement. page 22-50VALVE CABLEAdjustment, page 22-53
RECIRCULATIONCONTROL SWITCH
a/c swtTcH
MODEMOTOR
REAR WINDOWDEFOGGERSwlTCHSee section 23Replacement, page 22-41Test, page 22-41MODE CONTROLDIAL
HEATER CONTROLPANELReplacement, page 22 46
swtTcH
22-4
CONTROL
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Component Location
Index (cont'dl
SRS components are located in this area. Review the SRS component locations, precautions, and procedures in the SRS
section (24) before performing repairs or service.
BECIRCULATION CONTROL MOTOR4P CONNECTOR
EVAPORATOR TEMPERATURE SENSORTesl, page 22-44POWER TRANSISTOR3P CONNECTOR
AIR MIX CONTROL MOTORReplacement, page 22-43lest, page 22-13
BLOWER MOTOB2P CONNECTOR
BLOWER MOTOR HIGH RELAYTest, page 22-45
HEATER SUB.HARNESS
7P CONNECTOR
DASHBOARD WIRE HARNESS
HEATER CONTROL PANEL8P AND 2OP CONNECYORS
22-6
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Both Fans
RADIATOR FAN RELAY 'P SOCKET
BLK/YEL
PCM CONNECTOR A I32PI
'9? model:
PCM/ECM CONNECTOR A (32PI
'98 - 0O mod6ls:
Wire side of female terminals
* How to use the Backprobe SetsConnect the backprobe adapters to the stacking patch cords, and connect the cords to a multimeter. Using the wire insulation as a guide for the contoured tip of the backprobe adapter,gently slide the tip into the connector from the wire side until it comes in contact with the terminal end ofthe ware {see section l1).
Check the No. 17 (7.5 A) tuse inthe under-dash fuse/relay box.
Reolace the tuse. and recheck.
Check for an op€n in the wire:1. Remove the radiator fan relay.2. TLrrn the ignition switch ON (ll).
3. Measure the voltage betweenthe No.4 terminalofthe radiator fan relay 4P socket andbody ground.
Repair open in the wire betweenlhe No. 17 luse and the radiatortan relay.
Check for an open in the wire:1. Make sure the A/C switch isOFF.2. Using a *Backprobe Set {T/N07SAZ - 001000A), measurethe voltage between the No. 27I20l terminal ol the PCM/ECMconnector A (32P) and bodyground with the PCM/ECM con-nectors connected.[ ]: '98 - 00 models
Repair open in the wire b€tweenthe.adiator fan ralav, the con-denser tan rolay and the PCM/ECM.
Check tor loose wires or poor con-nodions at the PCM/ECM connoc-tor A (32P1. lf the connections arcgood, substitute a known-goodPCM/ECM, and recheck. It thesymptom/indicalion goes away,r.plrce the original PCM/ECM.
1
2
1
12461011
12t5t61718r9222321
GRN
Wire side oI female terminals
22-33
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Troubleshooting
Compressor (cont'dl
COMPRESSOR CLUTCH RELAY4P SOCKET
1
2
43
BLK/YEL
PCM CONNECTOB A I32P)
'97 model:
Wire side of female terminals
PCM/ECM CONNECTOR A {32P}
38 - 00 models:
Wire side of {em6le terminals
* How to use the BackDrobe SetsConnect the backprobe adapters to the stacking patch cords, and connect the cords to a multi-meter. Using the wire insulation as a guide for the contoured tip ot the backprobe adapter,gently slide the tip into the connector trom the wire side until it comes in contact with the teFminalend o{the wire {see section l1).
Frcm page 22-34
Ch6ck for an open in the wire:1. Disconnect the jumper wire.2. Turn the ignition switch ON (ll).
3, Measure the voltage betweenthe No. 4 terminal ot the com'pressor clutch relay 4P socketand body ground.
Repair op.n in the wire betweenthe No. l7 fu3e and the compres-sor clutch ielay.
Check for an opon in the wire:1. Turn the ignition switch OFF,then reinstall the compressorclutch relay.2. Make sure the A"/C switch isOFF, then turn the ignitionswitch ON (ll).
3. Using a *Backprobe Set (T/N
07SAZ - 001000A), measurethe voltage between the No.17 terminal ol the PCM/ECMconnector A (32P) and bodyground with the PC M/ECMconnectors connected,
Repair open in lhe wire betwoonthe compressor clutch r6lay andthe PCM/ECM.
Check tor loose wires or Doorconnections at the PCM,/ECMconnecto. A {32P1. lf the connec-tions are good, sub3titute aknown-good PCM/ECM, androcheck. lf the symptom/indica-tion goas away, replac€ the origi-nal PCM/ECM.
126I1011
12151617'181S222321
BLK/RED
22-36
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A/C aystem does not come on{both fans and comDrossor).
Ch6ck lor .n open in the wire:1. Disconnect the A,/C pressureswitch 2P connector.2. Turn the ignition switch ON (ll).
3. Measure the voltage betweenthe No.2 terminal and bodyground.
ls there approx. 5 volts?
check tho PcM/EcM:Using a *Backprobe Set (T/N
07SAZ 0010004). measure thevoltage between the No.5 t27lterminal of the PCM/ECM connec,tor C (31P) [A 132P)l and bodyground with the PCM/ECM con-nectors connected,I l: '98 - 00 models
Rop.ir open in th6 wire botweonthe A/C Dr*sure switch and thePCM/ECM.
ls there approx.5 volts?
Check tor loo3e wires or Doorconnections at the PCM/ECMconnoctor C l3lPl lA (32Pll. It theconnections arg good, 3ubdtitut€a known-good PCM/ECM, andrecheck. ll the 3ymptom/indica-tion go.. eway, r€placo thG origi-nal PCM/ECM,[ ]: '98 -00 models
A/C System
A/C PRESSURE SWITCH 2P CONNECTOR
fo page 22-38
PCM CONNECTOR C (31PI
'97 modol:
Wire side of female terminals
PCM/ECM CONNECTOR A I32P'
38 - 00 modeb:
Wire side of female terminals
* How to use the Backprobe SetsConnect the backprobe adapters to the stacking patch cords, and connect the cords to a multi-meter. Using the wire insulation as a guide for the contoured tip ol the backprobe adapter,gently slide the tip into the connector from the wire side until it comes in contact with the ter.minalond olthe wire (see section 11).
(cont'd)
22-37
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Heater Control PanelBlower Unit
Replacement
'1.Remove the center panel together with the heater
control panel and the audio unit (see section 20).
Remove the self-tapping screws and the heater con-
trol panel from the center panel.
3. lnstall in the reverse order of removal.
CENTER PANEL
22-46
1.
Replacement
Bemove the evaporator (see page 22-48),
Disconnect the connectors from the blower motor,
the blower motor high relay, the power transistor
and the recirculation control motor. Remove the
wire harness clio from the recirculation control
motor, and release the wire harness from the clamp
on the blower unit. Remove the mounting bolts, the
mounting nut and the blower unit.
6x1.0mm9.8 N.m (r,0 kgf.m, 7.2 lbl.ftl
9.E N.m 11.0 kgf.m,7.2lbtftl
lnstall in the reverse order of removal. Make sure
that there is no air leakage.
6x1.0mm
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Evaporator
Replacement
1.Recover the refrigerant with a recovery/recycling/
charging station (see page 22-59).
Remove the battery.
Remove each bolt, then disconnect the suction and
receiver lines from the evaporator. Plug or cap the
lines immediately after disconnecting them to avoid
moisture and dust contamination,
RECEIVER LINE
..
\
6x1.0mm9.8 N'm (1.0 kgf m,7.2 tbl.ttl
Remove the glove box (see section 20).
Remove the self-tapping screw and the passenger's
dashboard lower cover, then remove the bolts and
the glove box frame together with the knee bolster.
GLOVE BOX FRAME
KNEE
22-44
6. Disconnect the connector from the evaoorator tem-
oerature sensor. and remove the wire harness from
the evaporator. Remove the self-tapping screws, the
mounting bolt and the mounting nut. Disconnect
the drain hose, then remove the evaporator.
5xl,0mm9.8 N.m {1.0
II
I
Io
kgf.m, 7.2 lbf.ftl
, -l: "
7.
EVAPORATOR
6x1.0mm9.8 N.m (1.0 kgtm,7.2lbf.ftl
Install in the reverse order of removal, and note of
these items.
. lf you're installing a new evaporator, add refrig-
erant oil (SP.10) (see page 22-541.
Replace the O-rings with new ones at each fit-
ting, and apply a thin coat of refrigerant oil
before installing them. Be su.e to use the right
O-rings for HFC-134a (R-134alto avoid leakage.
Apply sealant to the grommets.
Make sure that there is no air Ieakage.
Charge the system (see page 22-6'll, and test its
performance (see page 22-56]-,
a
a
a
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A/C FilterHeater Unit
Replacement
1.Remove the glove box (see section 20).
Remove the glove box frame {see page 22-4A).
Release the wire harness from the clamps on the
evaporator. Remove the filter lid, then pull out the
,VC filter assembly from the evaporator housing.
A/C FILTER ASSEMELY
Remove the A/C filter from the filter housing.
Replace the Ay'C filter according to the maintenance
schedule in the owner's manual.
Install in the reverse order of removal. Make sure
that there is no air leakage.
22-50
Replacement
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section {24) before performing repairs or ser-
1. Disconnect the negative cable from the battery.
2. From under the hood, open the cable clamp, then dis-
connect the heater valve cable from the heater valve
arm. Turn the heater valve arm to the fullv ooened
oosition as shown.
When the engine is cool, drain the engine coolant
from the radiator (see section 10).
@ Do not remove the rldiator cap when
the engine is hot; the engine coolant is under pres-
sure and could sevo.ely scald you.
HEATER VALVE ARM
HEATER VALVE CABLE
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4. Disconnect the heater hoses from the heater unit.
Engine coolant will run out when the hoses are dis-
connected; drain in into a clean drip pan.
CAUTION: Engino coolant will damage p8int. Ouickly
rinse any spill€d engine coolant Itom painted sur-
faces.
HEATER HOSEIOUTLET SIDE)
Remove the mounting nut from the heater unit.
Take care not to damage or bend the fuel lines, the
brake lines. etc.
CLAMPS
13 N.m 11.3 kg{.m,9.4 lbtftl
22-51
7.
ll.
Remove the dashboard (see section 20).
Remove the evaporator (see page 22-48).
Disconnect the connectors from the mode control
motor and the air mix control motor, and remove the
wire harness clips and wire harness from the heater
unit. Remove the clip from the heater duct, then
remove the mounting nuts and the heater unit
6x1.0mm9,8 N.m (1.0 kgt m,7.2lblft)
qInstall in the reverse order of removal. Make note of
the following items.
a
a
a
a
Apply sealant to the grommets.
Do not interchange the inlet and outlet heater
hoses. Make sure that the clamps are secure.
Refill the cooling system with engine coolant
{see section 10).
Adiust the heater valve cable (see page 22-53).
Make sure that there is no air leakage.
HEATER UNIT
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