Power HONDA CIVIC 1999 6.G Workshop Manual
[x] Cancel search | Manufacturer: HONDA, Model Year: 1999, Model line: CIVIC, Model: HONDA CIVIC 1999 6.GPages: 2189, PDF Size: 69.39 MB
Page 1949 of 2189
- '99-'00 Models
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L-t'::-i
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UNDER.HOODFUSE/RELAYBOX
UNDER-DASHFUSE/RELAYBOXPHOTO 58
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See PowerDist.ibution,
FUSE 55HEAIERt/toToR
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g€e PowsrDlslribution,pag€ lGg,
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See GroundOistribution,page '14-5.
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60-1
Page 1952 of 2189
![HONDA CIVIC 1999 6.G Workshop Manual Air Delivery
- 99-00 Models
a
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- 99-00 Models
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RECIRCULATIONCONTROLMOTORPHOTO 139
CONTROLPANEL
vtEw 76
So€ Roar II Windolv :
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HEATERPUSHswtTcHEs
delrost
Air Airmix mixcool hot;;-; J'J - - - J-JL i- 5:- - -
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AIR MIXTURECONTROLMOTOR
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61-2
Page 1954 of 2189
A/C Compressor Controls
- AllModels
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A,/CCOMPRESSORCLUTCH
COMPRESSORTHERMALPROTECTOR
UNDER-HOODFUSE/RELAYBOXf-T-*-'.T'---l H53.',EPA?' i-l-------
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62
!(on bracket)
Page 1957 of 2189
- How the Circuit Works
Battery voltage is supplied through tuse 56 to the
A,/C compressor clutch r€lay contacts at all times.
With the ignition switch in ON (ll), vollage is applied
to the coil of the A,/C compressor clutch relay
through fuse 17. When you push the A,/C switch
ON, and the heater fan switch is in position | , 2, 3,
or 4, a "ground" input is provided to the engine
control module (ECM) or powertrain control module
(PCM) through the l'lC thermostat and the l'lC
pressure switch.
The A,/C compressor clutch relay is grounded by the
engine control module (ECM) or powertrain control
module (PCM). When energized, the A'lC
compressor clutch relay allows battery voltage to
turn on the A,/C comDressor clutch.
The A,/C ON indicator light comes on when the A,/C
system is requested.
A,/C Thermostat
The A'lC thermostat is located on the evaoorator
housing. The A,/C thermostat turns off the A,/C
compressor clutch if the temperature at the
evaporator goes below 3'C (37'F). This prevents
condensation from freezing on the evaporator fins
and blocking the air delivery into the passenger
compartment. The blower motor will keep running
when the sensor turns off the comDressor.
A,/C Pressure Switch
The fuC oressure switch is located in the condenser
outlet line where refrigerant is in a high
temperature/high pressure liquid state. The switch
will sense abnormally high or low pressure, and
open the circuit. This removes ground, and the
compressor will stop running.
Thermal Protectot
The thermal protector, located on the A,/C
compressor, opens and turns the compressor off if it
senses high temperature. Once the compressor
cools, the switch will close and the compressor will
begin running again.
Refer to the Service Manual (Section 22,
Air Conditioning) for specific tests or
troubleshooting procedures.
62-3
Page 1958 of 2189
Fans
- AllModels\,1 |
splicedtogetherinstead of inthe junctionconnector onDl6Y5 models
c211PHOTO 11
FANRELAYPrtofo 10
Se€ I'i CCompre€sorCont ols
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: (PCMoTECM) :I PHAfO 86I wEw 7allqA ----.ENGINECOOLANTTEMPERATUREswtrcH BLLPHO|O 33 ?
Ses GrolndDiskibution,oaqe 14.
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page 14.
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Se€ GroundOstribution,Pago 14.4"t1 - '96.f98: All models'99-'00: 016Y5 with M/I 01685"2 = '99-'00: Allmodels exceptD16Y5 with M/T and 01685
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63
Page 1959 of 2189
- '96-'98 Models
Fromunder,hood i-T ig;Eili--l UiB!'* il-;;.;l
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UNDER.HOODFUSE/RELAYBOX
HEATERCONTROLPANEL
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63-1
Page 1960 of 2189
![HONDA CIVIC 1999 6.G Workshop Manual Fans (contd)
- 99-00 Models
Switch"common
a,/cTHERMOSTATOff below3C (37" F).
rla
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- 99-00 Models
Switch\"common
a,/cTHERMOSTATOff below3C (37\" F).
rla
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Fans (cont'd)
- '99-'00 Models
Switch"common
a,/cTHERMOSTATOff below3'C (37" F).
rla
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OEE I Dbfibution,
I pacp 10.9.
HEATERCONTROLPANEL
vlEw 76
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r,/cswitchinputL-----
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S€e AltDeliv€ry,BaarWindowD€loggpr
See GroundDistribution,pag€ 1+5.
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tttlllnr ar-x,ver- | tn*t,".u IItI
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63-2
a/cONlrdlcalqr
Page 1961 of 2189
- How the Circuit Works
Radiator Fan
Voltage is provided at all times to the radiator fan
relay (contacts) through fuse 57. With the ignition
swilch in ON (ll), voltage is provided to the coil of
the relay through luse 17.
The radiator tan relay can be grounded through
either the engine coolant temperature switch or the
engine control module (ECM) or powertrain control
module (PCM).
The engine coolant temperature switch grounds
the radiator fan relay (coil) when the engine
coolant temperature exceeds 199'F (83'C). The
switch opens when coolanl temperature
decreases 3'- 8'C.
Condenser Fan
Voltage is provided at all times to the condenser fan
relay (contacts) through fuse 56. With the ignition
switch in ON (ll), voltage is provided to the coil of
the relay through fuse 17. When you push the A'lC
switch and put the heater fan switch in 1, 2,3, o( 4
position, the ly'C thermostat comes on, the
condenser fan relay energizes, and the condenser
fan motor runs.
A,/C Thermostat
The A,/C thermostat is located on the evaporator
housing. The A,/C thermostat tums off the A/C
compressor clutch if the temperature at the
evaporator goes below 3'C (37'F). This prevents
condensation from freezing on the evaporator fins
and blocking the air delivery into the passenger
compartment. lf the temperature goes below 3'C
(37"F) tuming off the Ay'C thermostat, ground will be
removed from the condenser fan relay. This will
deenergize the relay and remove voltage from the
condenser fan motor causing the fan to stop running.
Reter to the Service Manual (Section 23, Eleckical)
for specific tests or troubleshooting procedures.
63-3
Page 1963 of 2189
- '99-'00Models
t@
J
See Power0istribution,pag€ 1&9.
r
I
I
Lc420
vtEw 53".*:.f
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FUSE '7HEJT'EF AIC RETAY7JA
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Ss6 Pows Dist bution,pag€ 10-9.
Sn itchLEDcommon
c420PHOTO 63vtEw 53
HEATERCONTROLPANEL
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lgnition inpd
Swiich SlitohGroulld co{Y}rnon inMLEDgontrol
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HEATER PUSH SWITCHESUNDEN.DASHFUSE/RELAYBOXPHO|O 5e
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See GoundDistdbltion,page 14-7.
NEABwlNoolyDEFOGGENF€I.AYPrrolo 59
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BEARwtNDowDEFOGGER
64-1
Page 1966 of 2189
![HONDA CIVIC 1999 6.G Workshop Manual See Wiper,ryVasher
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70-1