Air Control HONDA CR-V 2000 RD1-RD3 / 1.G Workshop Manual

Ftom page 22.12HEATER CONTROL PANEL 2OP CONNECTOR
Wire side ol female terminals
Check tor a short to poweriCheck the same terminals forvoltage.
Repair shon lo power in the wi.ebetween the heater control paneland the air mix control motor,(This damages the heater controlDanel.l
Check tor an open in the wires:Check for continuity between fol-lowing terminals of the heatercontrol panel 20P connector andthe air mix control motor 5P con-nector,zOPi 5P:No. 1 - No.3No.6 _ No. 4No.g _ No.2No. 17 _ No.5No. 18 _ No. 1
Repair any open in the wire{s)betweon the heater control panel
and air mix control motor.
Check toa loos€ wir63 or poorconnections rl the heater controlpanel 20P connector and st theair mix control motor 5P connsc-tor. lJ the connections aro good,substitute a known-good hoatercontrol panel, and rechock. I thesymptom/indication goes away,..pl.ce the original heater con-trol panel.
REO/8LURED/YEL
RED/YEL
AIR MIX CONTROL MOTOR5P CONNECTORWire side of female terminals
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Troubleshooting
Blower Motor Speed
Recirculation indicator light indicates Diagnostic Trouble Code (DTC) 2: A problem in the blower motor circuit
The speed of the blower motor is controlled by signals sent from the heater control panel
POWER TRANSISTOR 3P CONNECTOR
1
2)3
f
BLK
Wire side of female terminals
JUMPERWIRE
HEATER CONIROL PANEL 2OP CONNECTORWire side oI fgmale t€rminals
12,/1,/68I10
't112131ia't51611181920
LI GRN/BLK
o
LT GBN/BLK
Blower motol only runs on highspood position; h does not run inany othe. speod positions.
Self-diagnosis circuit check indi-cates a problem in the blowermotor circuit,
Chack lor.n open in the wire:1. Disconnect the power transis-tor 3P connector.2. Check for continuity betweenthe No.3 terminal and bodygro(1nd.
Chock for.n op.n in thc wirobotween ihe powa. transistorrnd body ground, It tho wir. is
OK, check for poor ground atG,O1 .nd G4o2.
ls there continuity?
Chsck for an opon in the wire:'1. Connect the No. 1 and No. 3t€rminals of the power tran-sistor 3P connector with ajumper ware.2. Turn the ignition switch ON {ll).
Repair op6n in the wiro betwoontho Dower transi3tol and theblowor motor.
Check tor an open in tho wire:1. Turn the ignition switch OFF.2. Disconnect the iumper wire.3. Remove the heater controlpanel (see page 22-46).4. Check for continuity botweenthe No. 20 terminal of theheater control panel 20P con-nector and the No.2 terminalof the power transistor 3Pconnectof,
R€pair opon in tho wire betwoenth6 oowor ttan3i3tor and th6hoatar control oanel.
NOTE: lf the blower motor doesrun at all, refer to page 22-16.
10 page 22-15
22-14
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From page 22-14
Chock for a short in the wire:Check tor continuity between theNo. 20 terminal of the heater con'trol panel 20P connector and bodyground,
R.p.ir short in the wire betwoenth. herter control Denel snd theoowor tranSastor.
Check to. an open in the wire:1. Turn the ignition swilch ON (ll).
2. Measure the voltage betweenthe No. I terminal of theheater control panel 8P con-nector and body ground.
Repair opan in the wire betwaentho heatsr cont.ol o.nel and theblower motor.ls there battery voltage?
Chock th6 power iransistor:1. Turn the ignition switch OFF.2. Reconnect the heater controlpanel 8P and 20P connectors.3. Test the power transistor (seepage 22 44).
ls the power transistor OK?
Chec* for loo3e wires or Door oon-neclions at the heater controlpanel 8P and 20P connoctors andat lhe power tran3istor 3P connec-tor. lf lhe connectiorc are good,substituta , known-good hoatercontrcl pan6l, and r€check. ll thesymptom/indication goes away.replecg th6 original heater controloanel.
HEATER CONTROL PANEL 2OP CONNECTOR
2,/1,/l/68910
1112131a151617181920
LT GRN/BLK
o
Wire side of female terminals
HEATER CONTROL PANEL 8P CONNECTOR
BLU/8LK
Wire side of female terminals
1
4678
22-15
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Troubleshooting
Blower Motor (cont'd)
BI-OWER MOTOR I{IGH RELAY 4P CONNECTORWire side of female terminals
HEATER CONTROL PANEL 8P CONNECTORWire side of female terminsls
I{EATER CONTROL PANEL 2OP CONNECTORWirc side ot female terminals
Ftom page 22-17
Check for an open in the wiro:1. Femove the heater controlpanel (see page 22-46).2. Check lor continuity betweenthe No. 8 terminal oI theheater control panel 8P con-nector and the No. 1 terminalof the blower motor highrelay 4P connector.
Ropair op6n in th€ wira betweentho heater control panol and thoblowgr motor high relay.
Check lor an op6n in the wire:Check lor continuity between theNo. 8 terminal oI the heater control panel 20P connector and theNo. 4 terminal of the blowermotor high relay 4P connector.
Repair open in the wire botweonthe heater control Danel and theblowel motor high r6lay.
ls there continuhy?
Check fo. looso wiles or ooolconnoctions at the haatea controlDanel 8P .nd 20P connectors andat the blower motor high relay4P connoctor. ll the conn€ctionsare good, substitutg a known-good h.at.r control panol, andr.check. lf the symptom/indice-tion goes away, replace thg origi-nal heater contrcl panel.
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Troubleshooting
Evaporator Temperature Sensor
Recirculation indicator light indicates Diagnostic Trouble code (OTC) 3: A problem in the evaporator temperature sensor circuit.
The evaporator temperature sensor is a temperature dependent resistor {thermistor}. The resistance of the thermistordecreases as the evaporator outlet air temperature increases.
EVAPORATOR TEMPEMTURE SENSOR
Terminal side of mal€ terminals
RESISTANCEko
86'F30"c
HEATER CONTROL PANEL 2OP CONNECTOR
Wire side of fema16 terminals
Self-diagnosis circuit check indicates a problem in the avapora-tor tempeleture ssnsor circuit,
Ch€ck the ev.porato. tempera-ture sensor:1. Disconnect the evaporatortemperature sensor 2P con-
2. Measure the resistancebetween the No. 1 and No. 2torminals of the evaporatortemperature sensor.
ls the resistance within the speci,fications shown on the 9raph.
Check lor a short in the wire:l Remove the heater controlpanel (see page 22-46).2. Check tor continuity betweenthe No.2 terminal ol theheater control panel 20P con,nector and body ground.
Repai. short in the wir6 betwa€nlhe hoater control Danol and theevaporatoa tampereturc senSoa.
fo page 22.21
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From page 22-20
Chock tor an oDen in th€ wire:Check for continuity betlveen theNo. 2 terminal of the heater con-trol oanel 20P connector and theNo.2 terminal oI the evaporatortemperature sensor 2P connoctor.
Fopair open in the wiro betweentho heato. control penel and theevaporator tempetatule sensor.
Check for rn opsn in tha wiJe:Check for continuity between theNo. 9 terminal of the heater control oanel 20P connector and theNo. 'l terminal ot the evaporatortemperature sensor 2P connector,
Ropair open in tho wire betwegnthe heater control oanel and theevaporator tgmpcrature sen3or.
Chgck fol loose wiros or pool
connectrons at the hoator controloan6l 20P connector and at theeveporator temperatura Sensol2P connector. It the connectionsare good, substitute a known-good he.tel contlol panel, andrech€ck. ll thg symptom/indica-tion 90o3 rwey, roplsce the origi-nal heater control oanel.
HEATER CONTROL PANEL 2OP CONNECTORWire side ol female terminals
EVAPORATOB TEMPERATURE SENSOR2P CONNECTORWire side oI temale terminals
1810
1112131a1516't7181920
GIIN
12,/ l,/689t0
'tl1213lat1516'1718't920
o
+
li-L:t
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Troubleshooting
Mode Control Motor
NO
MODE CONTROL MOTOR 7P CONNECTOR
13I5
BLK/YEL
Wire side of female terminals
HEATER CONTROL PANEL 2OP CONNECTOR
BRN/WHT
Wire side of female terminals
Mode control motol does not run.or ono or more modes are inoD€aa-
Check the No. 17 {7.5 A) Iuse inthe under-dash fuse/relay box.
Replace the tus€, snd iecheck.
Chock tor an open in th€ wi.6:1. Disconnect the mode controlmotor 7P connector.2. Turn the ignition switch ON (ll).3. Measure the voltage betweenthe No. l terminal and bodyground.
Repair opon in the wire betwoontho No. 17 luse and tho modecontrol motor.
Check the mode control motor:1. Turn the ignition switch OFF.2. Test the mode control motorGee page 22 41') .
Chock th€ mode cont.ol link.geand doors:1. Remove the mode controlmotor (see page 22-41).2. Check the mode control linkageand doors for smooth move-ment,
ls lhe mode control motor OK?
Do the mode control linkageand doors move smoothly?
Replece the inod6 control motor.
Chock for s shon in the wir€s:1. Remove the heater controlpanel (see page 22'46).2. Check for continuity betweenthe No. 12, 13, 14, 15, 16 and 19terminals ol the heater controlpanel 20P connector and bodyground individuaily.
Repair any short in the wire(slbetween the mode control rnotoaand the h6ater control Danel.
ls there continuity?
2l,/1,/8I10
111213ta151617r81320
BLU
[E!r!
YEL/RED
Ii
To page 22-23
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From page 22-22
Chgck for a short to power:
Check th6 same wires lor voltage.
Ropair lhort to powor in the wiiobetw6an tho mode comrol motorend thc hoat.r cont.ol pan.l.(This damagF tha h€ator Gontrolpancl.l
Chack for an opon in tha wiles:Check lor continuity between thefollowing terminals oI the mode
control motor 7P connector andthe heater control panol 20P con-nector.20Pt 7P.No. 12 - No. 3No. '13 - No. 4No. 14- No.5No. 15 - No. 6No. t6 - No. 2No. 19 - No. 7
R.pair any opon in tho wilols)betwaen th6 modg cortrol motorand th. heatar control p.nsl.
Chock fo. loose wiret or pool
connections at the heat6r controlpancl 20P connector and tt themodo control motor 7P connoc-tor. lf tho connactions sre good,
substitute a known-good hortcrcontrol pan6l, and tech.ck. lf thesymptom/indication goes awaytroplaco tho original hcater @nttolp3nel.
HEATER CONTROL PANEL 2OP CONNECTOR
12'VVLgl8910
't112rslrrlrslre17181920
8LU/BLX
:L/BLUBRN/WHT
BRN/WHT
BRN/WHT
Wire side ot female terminals
MODE CONTROI- MOTOR 7P CONNECTORWire side ol temale terminals
2,/1,/l/II10
111213t14t151511181920
BLU/BL
GRi
YEL/
Kt I I|/YEL I IIYEL/REDI
t-BLUI q
;f;T;T;
YEL/BLU
YEL
BLU/BLK
GRN/ItEL
YI:L/FED
22-23
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Troubleshooting
Recirculation Gontrol Motor
YES
To page 22-25
REORCULATION CONTROL MOTOR,rP CONNESTOR
q?- T--- V-l
l1, lrl/l1lI BI.IUYEL(v)
+
Wire side of female terminals
Rocirculation control door do6snoi chango botw€en Fresh andReci.culate.
Check the No. 17 {7.5 A)tuse in theunder-dash f use/relay box.
Roplace the fu36, and rechock.
Check for .n open in the wire:1. Disconnect the recirculationcontrol motor 4P connector.2. Turn the ignition switch ON (ll).3. Measure the voltage betlveenthe No. l terminal and bodyground.
Repair op6n in the wire bdtweenthe No. 17 fuse and thc recircule-tion control motor.
Check the rocirculation controlmoior:1. Turn the ignition switch OFF.2. Test the recirculation controlmotor (see page 22-42).
Chock ths r.circulation controllinkag. end doori1. Remove the recirculation con-trol motor (see page 22,42).2. Check the recirculation controllinkage and door for smooth
Do the recirculation control linkage and door move smoothly?Boprir the recirculrtion controllinkag. or dooJ,
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Ftom page 22-24
Check tol a short in the wit6:1. Remove the heater controlpanel {see page 22-46)2. Check for continuity betweenthe No.2 and No.3terminals of
the heater controlpanel8P connector and body ground indi-vidually.
Reoaii short in tfte wir€{s) b€irv€€nthe redrc{lstion conttol motor and
ihe hedter control panel.
Check for a shon to power:
Check the same wires lor voltage.
Repair short to power in the wite
between the rocirculation controlmotor and lh€ heator controlpanel. (This demsges the heater
conlrol panel.l
ls there any voltage?
Ch€ck tor an open in the wires:Check for continuity between thefollowing terminals ol the recircu'lation control motor 4P connectorand the heater control panel 8P
8P: 4P:No.2 - No.4No.3- No.2
Ropair open in the wile(sl betweenthe recirculalion control motorand the heeter cortrol Pan€|.
Check for loose wires or pool
connections at the heat€r control
Danel 8P connoctor and .t therocirculation control motor 4Pconnector. lf lhe connec{ions aregood, substitule a known-goodhester control oanel, and rochock.lI the symptom/indication goes
away, .eplace the otiginal heater
control pan€|.
HEATER CONTROL PANEL 8P CONNECTOR
Wire side of female terminals
GRN/REO---1 T'lF Iir l516 I
213
;T;
1ffiIVI4I
GRN/WHT
RECIRCULATION CONTROL MOTOR,lP CONNECTORwire side ot female terminals
22-25
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