Hot air HONDA CR-V 1999 RD1-RD3 / 1.G User Guide

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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Air Mix Gontrol Motor
Replacement
1. Disconnect the 5P connector from the air mix con-
trol motor. Remove the self-tapping screws, the air
mix control motor and the flange collar.
AIR MIXCONTROLMOTOR
A
6
Install in the reverse order of removal. After installa-
tion. make sure the air mix control motor runs
smoothlv.
5P CONNECTOR
22-43
Test
1.Disconnect the 5P connector from the air mix con-
trol motor.
Connect battery power to the No. I terminal of the
air mix control moto., and ground the No, 5 termi-
nal; the air mix control moto. should run, and stop
at MAX HOT. lf it doesn't, reverse the connections;
the air mix control motor should run, and stoo at
MAX COOL.
lf the air mix control motor does not run, remove
it, then check the air mix control linkage and
doors for smooth movement.
lf they move smoothly, replace the air mix con-
trol motor.
AIR MIX CONTROL MOTOR
4.
Measure the resistance between the No. 2 and No. 3
terminals. lt should be approximately 6 kO t 20%.
Measure the resistance between the No. 2 and No, 4
terminals, lt should be approximately 4.8 kO:t 20% at
MAX HOT and approximately '1.2 kO t 20% at lilAx
cooL.
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A/C FilterHeater Unit
Replacement
1.Remove the glove box (see section 20).
Remove the glove box frame {see page 22-4A).
Release the wire harness from the clamps on the
evaporator. Remove the filter lid, then pull out the
,VC filter assembly from the evaporator housing.
A/C FILTER ASSEMELY
Remove the A/C filter from the filter housing.
Replace the Ay'C filter according to the maintenance
schedule in the owner's manual.
Install in the reverse order of removal. Make sure
that there is no air leakage.
22-50
Replacement
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section {24) before performing repairs or ser-
1. Disconnect the negative cable from the battery.
2. From under the hood, open the cable clamp, then dis-
connect the heater valve cable from the heater valve
arm. Turn the heater valve arm to the fullv ooened
oosition as shown.
When the engine is cool, drain the engine coolant
from the radiator (see section 10).
@ Do not remove the rldiator cap when
the engine is hot; the engine coolant is under pres-
sure and could sevo.ely scald you.
HEATER VALVE ARM
HEATER VALVE CABLE
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A/C System Service
Pressure Test Chart
NOTE: Performance Test is on page 22-56.
Test resultsRelatad symptomsPrcbable caus€Remody
Discharge (high)pressure 6bnormallyhagh
After stopping compressor, pressuredrops to about 200 kPa 12.0 kgtlcm,,28 psi) quickly, and then lalls gradualty.
Air in systemDischarge, evacuate, and rechargewith specified amount.Evacuation: see page 22-60Charging: see page 22-61No bubbles in sight glass whencondenser is cooled by waterExcessive refrigerant in systemDischarge, evacuate, and rechargewith specilied amount.Reduced or no air flow throughcondenser. Clogged condenser or radia-tor fins. Condenser or radiator fannot wo.king properly
CleanCheck voltage and fan rpm.Check fan direction.
Line to condensor is excossivelv hot.Restricted flow of relrigerant insy$emFestricted lines
Discharge pressureabnormally lowExcessive bubbles in sight glass;condenser is not hot.Insufficient retrigerant inCheck for leak.Charge system.High and low pressures are balancedsoon after stopping compressor. Lowside is higher than normal.
. Faulty compressor discharge
. Faulty compressor seal
Replace the comprossor.
Outlet ot expansion valve is notfrosted, low-pressure gauge indicates
' Faulty expansion valve. Moisture in system. Replace. Discharge, evacuate, andrecharge with specified amount.Suction {low) pros,sure abnormallyExcessive bubbles in sight glass;condenser is not hot.Insufficiont relrigerant inRepair the leaks.Discharge, evacuate, andrecharge with specified amount.Charge as r€quired.Expansion valve is not frosted, andlow-pressure line is not cold. Low-pressure gauge indicates vacuum.
' Frozen expansion valvelMoisture in system). Faulty expansion valve
. Discharge, evacuate, andrecharge with specitied amount.. Replace th€ expansion valve.Discharge temperature is low, and theair llow trom vents is restricted.Frozen evaporatorRun the fan with compressor off,then check evaporator tempera,ture sensor.Expansion valve is frosted.Clogged expansion valveClean or replace.Feceiver/dryer outlet is cool, and inlotrs w6rm (should be warm duringoperation).
Clogged receiver/dryerReplace
Suction pressureabnormally highLow-pressure hose and check joint arecooler than tho temperature aroundevaporator.
. Expansion valve open too long. Loose expansion capillarytube
Repair or roplace.
Suction pressure is lowored whencondenser is cooled by water.Excessive refrigerant in systemDischarge, evacuate, and rechargewath specified amount.High and low-pressure are equalizedas soon as tho compressor is stopped,and both gauges tluctuate whilerunning.
Faulty gasketFaulty high-pressure valveForeign panicle stuck in high-
Replace the compressor.
Slction and dis,charge pressutesabnormally high
Reduced air flow through condens€r,. Clogged condenser orradiator tins. Condenser or radiator fannot working properly
CleanCheck voltage and fan rpm.Check Ian direction.
No bubbles in sight glass whencondenser is cooled by walerExcessive refrigerant jn systemDischarge, evacuate, and rechargewith specified amount.Suction and dis-charge pressureabnormally low
Low-pressure hose and motalendareas are cooterlhan evaporator.Clogged or kinked low-pressure hose pansRepair or replace.
Temperature around expansion valvers too low compared with that aroundClogged high-pressure lineRepair or replace.
Refrigerant leaksCompressor clutch is diny.Compressor shaft seal leakingReplace the compressor.Compressor boltls) are dirty.Leaking around bolt(s)Tighton bolt{s) or replacecompressor.Compressor gasket is wet with oil.Gasket leakingReplace the compressor,
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Troubleshooting
Tips and Precautions (cont'dl
Insen the connector all the way and make sure it is
securely Iocked.
Position wires so that the open end of the cover faces
down.
V
Faceopen end
Handling Wires and Harnesges
. Secure wires and wire harnesses to the frame with
their respective wire ties at the designated locations.
. Remove clips carefully; don't damage their locks.
Slip pliers under the clip base and through the hole at
an angle, then squeeze the expansion tabs to release the
clrD.
After installing harness clips, make sure the harness
doesn't interfere with any moving pans.
Keep wire harnesses away from exhaust pipes and
other hot parts, trom sharp edges of brackets and
holes. and from exoos€d screws and bolts.
NOT GOOD
A -M/
lr lr*
T€sting and Repairs
. Do not use wires or harnesses with broken insulation.
Replace them or repair them by wrapping the break
with electricaltape.
. After installing parts, make sure that no wires are
pinched under them.
. When using electrical test equipment, follow the
manufacturer's instructions and those described in
this manual.
. lf possible, insert the probe of the tester from the
wire side (except waterproof connector).
. Seat grommets in their grooves properly.
. Use a probe with a tapered tip.
Refer to the instructions in the Honda Terminal Kit for
identification and replacement of connector termi-
nals.
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Airbag/Seat Belt Tensioner
1.
Disposal (cont'dl
Connect a 12 volt battery to the tool'
. It the green light on the tool comes on, the air-
bag igniter circuit is defective and cannot deploy
the airbag. Go to Damaged Airbag Special
Procedure.
.lftheredlightonthetool comes on, the airbag is
ready to be deployed.
Push the tool's deployment switch. The airbag
should deploy (deployment is both highly audible
and visible; a loud noise and rapid inflation of the
bag, followed by slow deflation).
. lf the airbags deploy and the green light on the
tool comes on, continue with this procedure.
. lf an airbag doesn't deploy, yet the green light
comes ON, its igniter is defective. Go to Dam-
aged Airbag Special Procedure.
. During deployment, the airbag can become hot
enough to burn you, Wait thirty minutes after
deployment before touching the airbag.
Dispose of the complete airbag. No part of it can be
reused. Place it in a sturdy plastic bag, and seal it
securety.
CAUTION:
. Wear a faco shield and gloves when handling a
deployed airbag.
. Wash your hands and rinse them well with
water after handling a deployed airbag.
24-98
Deploying tho Airbag: Out-ot.vohicle
lf an intact airbag has been removed from a scrapped
vehicle, or has been found defective or damagsd during
transit. storage or seryice, it should be deployed as fol-
lows:
'L Confirm that the special tool is functioning properly
by following the check procedure on this page or on
the tool label.
2. Position the airbag face up, outdoors on flat ground
at least thirty feet (10 m) from any obstacles or peo-
Dte,
3. Follow steps 6, 7, 8. and 9 of the in-vehicle deploy-
ment proceoure.
Dlmaged Airbsg {or Seat Beh Ten3ion6r} Sp6cial
Procgdure
!@ r an airbag {or seat Beh rensioner} cannol
be doployod, it should not be treated as normal scrap; it
should still be considered a pot€ntially explosive device
lhat can cause serious iniury.
1. lf installed in a vehicle. follow the removal proce-
dure on page 24-3 and 24-87 through 90.
2. In all cases, make a short circuit by twisting together
the two airbag inflator wires.
3. Package the airbag in exactly the same packaging
that the new reDlacement Dart came in.
4. Mark the outside of the box "DAMAGED AIRBAG
{or TENSIONER) NOT DEPLOYED" so it does not
get confused with your parts stock.5. Contact your Honda District Service Manager forhow and where to return it for disposal.
Deployment Tool: Check Procedure
Connect the yellow clips to both switch protector
handles on the tool; connect the tool to a battery.
Push the operation switch: green means the tool is
OK: red means the tool is faultv.
Disconnect the baftery and the yellow clips.
I
t
l.
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