1998 HONDA CR-V Lower control

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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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
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
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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.
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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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Overhaul
Note these items when overhauling the blower unit.
. The recirculation contfol motor. the power transistor, the blower motor high relay, and the blower motor can be
replaced without removing the blower unit.
. Betore reassembly, makesurethatthe recirculation control doorand linkage move smoothly without binding.
o After reassembly, make sure the recirculation control motor runs smoothly (se€ page 22-42).
o Make sure that there is no air leakage.
RECIBCULATION CONTBOL MOTORReplacement. page 22-42
BLOWER
m
Tost, page 22-45
POWEB TMNSISTORTest. page 22'44
22-47
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Body Electrical
Speciaf Toofs ,...,..,.............-.23-2
Troubleshooting
Tips and Precautions ......,.,..........,.................. 23-3
Five-step Troubleshooting ........,.,.,...,,.,......... 23-5
Wire Color Codes ...,....,.. 23-5
Relay and Control Unit Locations
Engine Compartment ..,.,......,......................... 23-6
Dashboard ,.,.,..............-.- 23-7
Door ....................... .........23-10
Index to Cilcuits and Sysiems
Accessory Socket .. ,....,.,..,.,. 23-95*Airbags ................ .,....,. Sestion 24
Air Conditioning ,.,.,.... Section 22
Alternator ................... Section 4
Anti-lock Brake System {ABSI ................... Section 19'A/T Gear Position Indicator ....................... Section 1,1
Automatic Transmission System ...........,.. Section 14
Battery ................... ..............23-50
Blower Controls .,...,.,, Section 22
Charging System ....... Seqtion il
Clock -'98 Model ................ 23-98
Connector ldentification and Wire HarnessRouting .................. ......... 23.11
Cruise Control ............ Ssction 4
Dash Lights Brightness Contlo||er ..................... 23-90
Fan Conlrols ...,......,.... Section 10
Fuel Pump ,..,.,...,....,.... Section 11
Fuses...................... .,,.,.,.,.,,.,23-40*Gauges
Circuit Diagram ......-....-..23-58
Fuel Gauge .....,.,..... Section 11
Speedometer ..,..........,... 23-56
Ground Distribution ,....,.,...23-46
Hatch Glsss ODenor .........................,.,.,.,.,..,.,.,.,,. 23-121
Heater Controls .-........ Soction 21*Horns.,...,..,.,.,....... ................23"104*fgnition Switch ,,.,.,..,.,.,,.,.,.,23-51
lgnition Key Light System -'97 Mod6l .............. 23.88
-+
BODY
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Relay and Control Unit Locations
Engine Compartment
ELECTRICAL LOAD DETECTOR IELDIUNITUNDER.HOODFUSE/RELAYBOX
BLOWERMOTORRELAY
A/C COMPRESSORCLUTCH RELAY
RADIATORFAN EELAY
UNDER.HOODABS FUSE/RELAYBOX
t:
tr
tr
tr
;
-
''r@
Dl-- r rr r
23-6
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