recirculation HONDA CR-V 1997 RD1-RD3 / 1.G Workshop Manual
[x] Cancel search | Manufacturer: HONDA, Model Year: 1997, Model line: CR-V, Model: HONDA CR-V 1997 RD1-RD3 / 1.GPages: 1395, PDF Size: 35.62 MB
Page 1094 of 1395
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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Page 1100 of 1395
Troubleshooting
Symptom Ghart
For electrical malfunctions which are indicated by the self-diagnostic system, reter to selt-diagnosjs function (see next
page).
Note these items before troubleshooting a symptom.
. Check the engine coolant level, and allow the engine to warm up before troubleshooting.
. Anv abnormality must be corrected before continuing the test.
. Because of the precise measurements needed, use a digital multimeter with an output of 1 mA or less at the 20 kO
range when testing.
. Before performing any troubleshooting procedures check:
- Fuses No. 47 17.5 AJ, No. 55 (40 A), No. 56 (20 A), No. 57 (20 A) in the under-hood fuse/relay box, and No. 17 {7.5 A) in
the under-dash fuse/relay box.._ Grounds No. G101, G201, G202, G401, G4O2
- Cleanliness and tightness of all connectors
SymptomSse pags
Mode control motor does not run, or one or more modes are inoperative.
Recirculation control door does not change between Fresh and Recirculate.22-24
Radiator fan does not run at all (but condenser fan runs with the AVC on).
Condenser fan does not run at all {but radiator fan runs with the Ay'C on).22-29
Both fans (radiator and condenser) do not run for engine cooling. but they both run with the A,/C
on.
Both fans do not run with the Ay'C on22-33
Compressor clutch does not engage.22-34
AJC svstem does not come on (both fans and compressor).22-37
Both heater and A/C do not work,22-39
22-10
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Page 1101 of 1395
Self-diagnosis Function
The heater control panel has a self-diagnosis function.
Running the Self-diagnosis Function'97 mod€l:
Turn the ignition switch ON {ll), then set the mode control dial to the Vent position, and the recirculation controt switch toRecirculate {recirculation indicator light comes on). Press and hold the recirculation control switch to Fresh (recirculation indi-cator light goes off). Continue to hold the switch; the recirculation indicator light will come on for two seconds. then it willblink the Diagnostic Trouble Code (DTC) to indicate a iaulty component. lf no DTC'S are found, the indicator liqht will notblink atter the initial two second light.
'98 - 00 models:
Set the mode control dial to the Vent position, and turn the ignition switch ON (ll). Within six seconds after turning the igni-tion switch on, press the recirculation control switch the required number of times depending on the recirculation indicatorlight status:
.lftheindicatorlightisON,presstherecirculationcontrol switch five times..lftheindicatorlightisOFF,presstherecirculationcontrol switch six I|mes.The recirculation indicator light will come on for two seconds, then blink the Diagnostic Trouble Code (DTC) to indicate afaulty component. lf no DTC'S are found, the indicator light will not blink after the initial two second liqht.
DTC Indicaiion Pattern {See DTC 3}:
Rocirculationindicatorlight on
Recirculrtionindicatorlighi off'97 model:P.ess and hold th6 recircul.tioncontrol switch'98 - 00 modek:Within six second3 atter theignition switch b turned ON (lll.Prass the rocirculation controlswitch the required number oltimes depending on the r6circu-lation indicator light striu3
,r*
/1.5 aaa 0.3 aac
RECIRCULANONINDICATOR LIGHT
In case of multiple problems, the recirculation indicator light indicate only one DTC that is the least number of blinks.
Resetiing the Solf.diagnosis Funqtion
Turning the ignition switch OFF will cancel the self-diagnosis function. After service work, run the self-diaqnosis functiononce again to check that there is no other Droblem.
MODE CONTROL OIAL
Diagnostic
trouble
code {DTCI
R6circulation
indicator lightComponent with problsmPossiblo causcSee page
'lOne blinkAir mix control molorOpen or short circuit, obstructed door,
faulty motor22-12
2Two blinksElower motorOpen or short circuit, faultv motor22-14,16
Three blinksEvaporator temperature sensorOpon or short circuit, faulty sensor22-20
t
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Page 1102 of 1395
Troubleshooting
Air Mix Control Motor
Recirculation indicator light indicates Diagnostic Trouble Code (DTC) 1: A problem in the air mix control motor circuit.
The air mix control motor regulates the mixture of cool/hot air according to outputs from the heater control panel.
Selt-diagnosis circuit check indi-cates a Droblem in the air mixcontrol motor circuil.
Chock the air mix control moior:1. Disconnect the air mix controlmotor 5P connector,2, Test the air mix control motor(see page 22-43).
Check the air mix control linkagoand doors:1. Remove the air mix controlmotor (see page 22'43).2. Check the air mix control linkage and doors for smooth
ls the air mix control motor OK?
Do the air mix control linkage anddoors move smoothly?
Reolacelhe air mix conlrol motor.
Check Ior a short in the wires:1- Remove the heater controlpanel (see page 22-46).2. Check tor continuity betweenbody ground and the heatercontrol panel 20P connectorterminals No. 1, 6, 9, 17 and18 individually.
Ropair any short in the wire(s)betwoon th. heater co.rtrol panel
and the air mix conlrol motor.
HEATER CONTROL PANEL 2OP CONNECTOR
PNK/BLK
RED/BLU
Wire side of female terminals
To page 22-13
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Page 1104 of 1395
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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Page 1106 of 1395
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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Page 1110 of 1395
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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Page 1114 of 1395
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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Page 1115 of 1395
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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Page 1132 of 1395
Recirculation Control Motor
Replacement
1. Oisconnect the 4P connector and the wire harness
clio from the recirculation control motor. Remove
the self-tapping screws and the recirculation control
motor,
lnstall in the reverse order of removal. After installa-
tion, make sure the recirculation control motor runs
smoothlv.
{P CONNECTOR
22-42
Test
1.
4.
Disconnect the 4P connector from the recirculation
control motor.
Connect battery power to the No. 1 terminal, and
ground the No. 2 and No. 4 terminals; the recircula-
tion control motor should run smoothly. To avoid
damaging the recirculation control motor. do not
reverse power and ground.
RECIRCULANON CONTROL MOTOR
Disconnect the No. 2 or No. 4 terminals from ground;
the recirculation control motor should stop at Fresh
or Recirculate. Don't cvcle the recirculation control
motor for a long time.
lf the recirculation control motor does not run in step
2, remove it, then check the recirculation control link-
age and door for smooth movement. lf they move
smoothly, replace the recirculation control motor.
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