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

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
www.emanualpro.com

Chock for an open in the wiro:1. Disconnect the iumper wire.2. Turn the ignition switch ON (ll).
3. Measure the voltage betweenthe No. 4 terminal oI the con-denser fan relay 4P socket andbody ground.
Repair opcn in tho wire betwoonthe No. 17 tuse and the con-densea fan relay,
Repair open in the GRN wirob6tw6en the cond.nser lan relayand rhe PcM/EcM,
Ftorn page 22-29
CONDENSER FAN RELAY 4P SOCKET
22-31
www.emanualpro.com

Radiator Fan Switch
RADIATOB FAN SWITCH 2P CONNECTOR
1
'.r
GRN
Wire side of female terminals
Both tans (radiator and condenser)do not run fo. engine cooling, butthey both run with the A/C on.
Check lor rn open in the wire:1. Disconnect the radiator fanswitch 2P connector.2. Turn the ignition switch ON lll).3, Measure the voltage betlveenthe No.2 terminal and bodygrou nd.
Repair open in the wire betweenthe radiator tan relay, the con-densei lan .elay and the radiaiortan swhch.
ls there battery voltage?
Chock for an open in the wire:1. Turn the ignition switch OFF.2. Check for continuity betweenthe No. 1 terminal of the radi-ator fan switch 2P connectorand body ground.
Check for an open in the wirebetween the .adialor fan switchand body glound. I ths wire is OF;choc* tor poor g.ound at G'101.
ls there continuity?
ls the cooling system OK?
Replsce the radialor fan switch.
www.emanualpro.com

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
www.emanualpro.com

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
www.emanualpro.com

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
www.emanualpro.com

Troubleshooting
A/G System {cont'd)
From page 22-37
A/C PRESSURE SWITCHCheck th€ A/C pressure switch:1. Turn the ignition switch OFF.2. Check lor continuity bgtweenthe No. 1 and No.2 terminalsofthe A,/C pressure switch.
Check for proper Ay'C system pressure.
Roplece tha A/C pr€ssure switch.
Chock lor an opgn in thg wire:1. Feconnect the A/C pressure
switch 2P connector,2. Remove the heater controlpanel (see page 22-46).3. Turn the ignition switch ON llli.4. Measure the voltage betweenthe No. 10 terminal of theheater control panel 20P con-nector and body ground.
Repair open in the wir. botwcenthe A/C pres3ur€ switch and theheater control oanel.ls there approx. 5 volts?
Check lor loos6 wiras or pool
connections at the heater controlDanel 20P connoctor and at theA/C pr.ssule switch 2P connsc-tor. lf the connections ere good,
substitute a known-good heatarco trol pangl, end recheck. lf thesymptom/indication goes away,replace the original heater conlrolpanel.
HEATER CONTROL PANEL 2OP CONNECTOR
Wire side ol female terminals
22-38'
www.emanualpro.com

Both heater and A/C do not work.
Check the No. 17 (7.5 A)fuse in theunder-dash fuse/relay box, and theNo. 47 (7.5 A) fuse in the under-hood luse/relay box.
nophcc ih. fur.l.l, .nd r.check.
Check tor rn open in the wiro:1. Remove the heater controlpanellsee page 22 46).2. Turn the ignition switch ON (ll).3. Measure the voltage betweenthe No. 1 terminal of theheater control panel 8P con-nector and body ground.
R.pair opan in lha wlra batw.cnthe No. 1? fuaa and tha h.ltcrcontrol panal.ls thero battery voltage?
Chgck for an opan in th€ wirg:1. Turn the ignition switch OFF.2. Measure the voltage betweenthe No. l l terminal of thoheater control panel 20P con-noctor and body ground.
Repsil opon in tha wi.a batwcanth. No. 47 tur. and tho hoitorcontlol panol.
ls there battery voltags?
Check for an opon in the wire:Ch6ck lor continuity betwoen theNo. 7 terminal of the heater con-trol panel 8P connector and bodyground.
Check for an opon in tho wirab6{woon tho hoatar control p.noland body ground. It the wir. i3OK, chsck for poor ground rtGlOl lnd Glo2.
Check for loose wire3 or oooaconnection3 at the haater controlprnol 8P and 20P connoctors. Itthc conncction3 are good, substi-tuta a known-good h€ater con-trol prnol, and rechecft. lf thesymptom/indic.lion go.3 ewry,repl.cg the original ha.ter con-tlol oancl.
HEATER CONTROL PANEL 8P CONNECTOR
Wire side ot female terminals
HEATER CONTROL PANEL 2OP CONNECTOR
I2A,/1,/58910
1t12131a151517181920
WHT/BLU
Wire side of female terminals
23
{578
BLK
0
www.emanualpro.com

Troubleshooting
Heater Control Panel Input/Output Signals
HEATER CONTROL PANEL CONNECTORS
8P CONNECTOR
Wire side of female terminals
2OP CONNECTOR
8P CONNECTOR
Cavitylrvire cololSignalCavityWire cololSignal
'lBLK/TE LIG2 (POWER)INPUTREDDASH LIGHTS ERIGHT-
NESS CONTROLLERCUTPUT
2GRN/REDRECIRCULATEINPUTRE D/BLK
COMBINATION LIGHT
SWITCH (Via No. 30 (7.5 A)
fuse)
INPUT
GRN/VVHTFRESHINPUT1BLKGROUNDOUTPUT
BLUI/ELREAR WINDOW
DEFOGGER RELAYCUTPUT8BLU/BLKBLOWER FEEDBACKINPUT
20P CONNECTOR
CavityWire colorSignalCavityWire colorSignal
1GRYAIR MIX POTENTIAL +5VOUTPUT'llWHT/BLUBACK PU (POWER)INPUT
2GRNEVAPORATOR TEMPERA.
TURE SENSOROUTPUT12YELMODE HEAT/DEFINPUT
13BLU/BLKMODE HEATINPUT
14GRN/YELMODE HEAT/VENTINPUT
ICYEUREDMODE VENTINPUT
6PNI(BLKAIR MIX POTENTIALINPUTtoYEUBLUMODE DEFINPUT
717RED/BLUAIR MIX COOLOUTPUI
8ORNrur'HTBLOWER MOTOR HIGH
RELAYINPUT18RE D/VE LAIR MIX HOTOUTPUI
BRNSENSOR GROUNDINPUT'19BRNA/VHTIVIODE MOTOR GROUNDINPUT
10BLU,ryVHTA"/C PRESSURE SWITCHINPUT20T GRN/BLKPOWER TRANSISTOR BASECUTPUT
22-40
www.emanualpro.com

Evaporator Temperature
SensorPower Transistor
Test
Dip the sensor in ice water, and measure the resistance
with a digital multimeter. Then pour hot water on the
sensor, and check lor change in resistance.
Compare the resistance reading between the No. | 8nd
No. 2 terminals of the evaporator temperature sensor
with the specifications shown in the following graph;
resistance should be within the specifications.
EVAPOBATOR TEMPERATURE SENSOB
Terminal side ol male terminals
4
RESISTANCEko
t0
50 68 86.F10 20 30'c
22-44
12V 1.2-3.1W
No. 2 ILT GRN/BLK)
No. I IBLU/BLK)
Test
1.Disconnect the 3P connector from the oower tran-
st$or.
Carefully release the lock tab on the No. 2 terminal in
the 3P connector, then remove the terminal and insu-
late it from body ground.
Connect a 1.2 - 3.4 W bulb between the No, 1 and
the No,2 cavity on the 3P connectol
Reconnect the 3P connector to the power transistor.
Turn the ignition switch ON (ll). and check that the
blower motor runs.
a lf the blower motor runs at half soeed the oower
transistor is OK, replace the heater control panel.
. lf ths blower motor does not run at half soeed,
reDlaca the Dower transistor.
www.emanualpro.com