voltage HONDA CR-V 1997 RD1-RD3 / 1.G Workshop Manual

Troubleshooting
Blower Motor
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,
BLOWER MOTOR 2P CONNECTOR
JUMPEFw|RE
Wire side of lemale terminals
Blower motor do.3 not run at all.
Selt-diagnosis circuit check indi-cates a problem in the blowermotor circuit,
check rhe No. 55 (40 A) {use inthe under-hood fuse/relay box,and the No. 17 (7.5 A) fuse in theunder-dash fuse/relay box.
Replace th6 fuse(s), and rechalck.
Check tho blowe. motor inputand output cilcuh:1. Connect the No. 2 terminal ofthe blower motor 2P connec-tor to body ground with ajumper wrre.2. Turn the ignition switch ON (ll).
Does the blower motor run?
Chock the blower moto.:1. Disconnect the jumper wireand the blower motor 2P con-nector.2. Measure the voltage betweenthe No. l terminal and bodygrou nd.
Check tho blower motor rolay:1. Turn the ignition switch OFF.2. Romove the blower motorrelay from the under-hoodfuse/relay box, and test it (seepage 22 45l'.
fo page 22-11
fo page 22-19
22-16
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From page 22-16
Check lhe blower motor hightelay:1. Turn the ignition switch OFF,and disconnect the ju mper
2. Remove the blower motorhigh relay, and test it {seepage 22-45).
Check for rn opon in the wire:l. Connect the No. 1 terminal ofthe blower motor high relay4P connector to body ground
with a iumper wire.2. Turn the ignition switch ON (ll).
R6pair opcn in the wire botwoenthe blower motor and the blowermotoi high relry.Does the blower motor run?
Check tor an opon in the wire:'1. Turn the ignition switch OFF,and disconnect the iumper
2. Turn the ignition switch ON {ll).3. Meas0re the voltage betweenthe No. 2 terminal of theblower motor high relay 4Pconnector and body ground.
Repair opon in the wiro betweonthe No. 17 fuse and tho blowelmotor high relay.ls there battery voltage?
Check tor an open in the wire:'1. Turn the ignition switch OFF.2. Check lor continuity betweenthe No. 3 terminal ot theblower motor high relay 4Pconnector and body ground.
Check for an open in the wirebetween the blowar motor highrel.y and body ground. lf the wiroi3 OK, check fo. poor ground atG{Ol .nd Gt|()2,
To page 22-18
BLOWER MOTOR HIGH BELAY itP CONNECTOR
BLU/BLK rF r.--1 1 2 )l|_#
.ruuee" I l31i
wrRE I
Wire side of female terminals
(cont'd)
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Rcpbcc tho blower motor rolay.
Ch.ck th. under-hood tu.o/rolaybox:Measur6 the voltage between theNo. 3 terminal ofthe blower motorrelay 4P socket and body ground.
Chack tor an open in the wilo:1. Turn the ignition switch ON (ll).
2. Measure the voltage betweenthe No. 4 terminal of theblower motor relav ,[P socketand body ground.
Ropair opon in the wirs botwoonth. No. 17 fu3o and th. blow6rmotol lolay.ls thore battery voltage?
Chack tor an opon in tho wilo:1. Turn the ignition switch OFF.2. Check for continuity betweenthe No. 2 terminal ot theblower motor relay 4P socketand body ground.
Chock tor !n opan in the wilebstween tha blowar motor ralaY.nd body ground. It tho wilc isOK, chock fol poor ground atG/Ol and G402.
Ropair opon in th. BLU/WHTwira batwaan lho blowor motolrohy and tho blowe. motor.
Frcm page 22-16
BLOWER MOTOR RELAY 4P SOCKET
922-1
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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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Troubleshooting
Radiator Fan
MDIATOR FAN RELAY 4P SOCKET
Radiator tan doos not run at sll(but condonser fsn runs with theA/C onl.
Check rhe No. 57 (20 Alfuse in theunderhood fuse/relay box, andthe No. 17 17.5 A) luse in the0nder-dash fuserelay box.
R.pl.c. th. fur€|.l, .nd r.chack.
Remove the radiator fan r6lay,and test it {see page 22-45).
R.pllco tha r.diator frn rehy.
Check the und.r-hood fus./r.l.ybox:Measure the voltage between theNo. 2 terminal ol the .adiator tanrelay 4P socket and body ground.
Chock the radiator tan:Connect the No. 1 and No.2 t€rminals of the radiator fan relay4P socket with a iumper wire.
Does th6 radiator fan run?
fo page 22-28
fo page 22-21
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Troubleshooting
Radiator Fan (cont'dl
From page 22-26
RADIATOR FAN RELAY 4P SOCKET
BLK/YEL
1
2
a
Chock for an open in the wire:'1. Disconnect the jurnper wire.2. Turn the ignition switch ON (ll).3. lleasure the voltage betweenthe No.4terrninal of the radia-tor fan relay 4P socket andbody ground.
R€pair open in th6 wire botwoonthe No. 17 fuso and the radiatolfan .elsy.
ls there battery voltage?
Rep.ir open in the GRN wirebotw€en lhe radiator tan relayand the PCM/ECM.
22-28
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Condenser Fan
CONDENSER FAN RELAY 4P SOCKET
(cont'd)
Condenser lan does not run at alllbut radiator fan runs with theA/C on).
Check the No. 56 (20 A) fuse in theunder hood fuse/relay box, and theNo. 17 {7.5 A) fuse in the under-dash fuse/relay box.
Replace the luse(s), and .echeck.
Remove the condenser fan relay,and test it (see page 22-45).
Replace the condenser fan r€lay.
Check the under-hood luso/relaybox:Measure the voltage between theNo.2 terminal of the condenserfanrelay 4P socket and body ground.
Check the condensff fan:Connect the No. 1 and No. 2 terminals of the condenser lan rclay4P socket with a jumperwire.
Does the condenser fan run?page 22-30
To page 22 31
22-29
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