Page 1949 of 2189
- '99-'00 Models
i-F;;t
L-t'::-i
"d[ft?"l'
UNDER.HOODFUSE/RELAYBOX
UNDER-DASHFUSE/RELAYBOXPHOTO 58
iGi'i'-----'lBEATEA,'/C RE|AY7.5A
".*1.[F*ft"
See PowerDist.ibution,
FUSE 55HEAIERt/toToR
page 10"9.L-*----::--J
BLU
n
$
Se€ PowsrDl8tdbution,pago 1O11.
g€e PowsrDlslribution,pag€ lGg,
ALOWEFmoToRREIAYPHOTO Il1
BIUBLIVYEI
813
OFN/WHT
BLK
2BIK
G402G402
"lSi:lf:::' >-1
-".. i c.u, I--';-lP;!o;i: I---------J
l ,f 3ffJ?il3'o'"o'o*'on
L __ f_---_-_ :::::: - --- r-- -- J
-f-***;
;Iru
I 'rr l-'n BLowER---:-----.l I A lm-o-roC'------------a---E eaoz - I( M rlProraE3PHoro 12s I Y I=----GG-a -
vtEvl 57c440
Se€ Ground
".","i-l'
Ea
JI
6BLOWERMOTORTIIGHRELAYPHO|O 83
UNDER.HOOOFUSE/RELAYBOX
t
!.-
1 HEATER I"-'FI POWERt Battory lgnition Blower I CONTROL I | | rAlHStStOni (brckup) input molor i pAHel I I I pHoro 13e
I ,,o*", _ ffJtt' t PHoro tr7 | tt I
i motor Power ' 'Jback I wr'vzo
I ;_ |! high relay transislor
Ls::s1gl-tt:---J lJ J I
A6
alK
See GroundOistribution,page '14-5.
za
60-1
Page 1950 of 2189
Air Delivery
- '96-'98 Models
SgE PorvstDistrtbLditr,pags I S9.
9 Y C420
BLx,yEL ELK/'(EL I PHora363
I t FUSE 17 I: H€AITN :
! f I9"",' see Powsr !i f otsaibution, i
LJ----':g':' --.i
UNOER-DASHFUSEiRELAYBOXPHOTA 58
a
er.x,ter- [
".*.. ";:.it#?.9.,,
See Dash andConsole Ughts
RECIRCULATIONCONTROLMOTORPHO|O A2
€\
r
I
I
I
I
S6€ IVCComprsssof Controls
a
c723PHOTO 138vtEw 57GBN/IVHT
12
GBN/NED
13
61
\'a
Page 1952 of 2189
![HONDA CIVIC 1998 6.G Workshop Manual Air Delivery
- 99-00 Models
a
r--T----.I UNDER-HOOD UNDEB-DASH
| ,ry:i.l? IFUSE/RELAY I t::u:E^tt l:usE/RELAyi
- -{-;;; -
I PJ,.,8.J390 i
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- - - - -
I H$3,,8
i 1;:t"* ];FPJ", i i m.](/manual-img/13/6068/w960_6068-1951.png "HONDA CIVIC 1998 6.G Workshop Manual Air Delivery
- 99-00 Models
a
r--T----.I UNDER-HOOD UNDEB-DASH
| ,ry:i.l? IFUSE/RELAY I t::u:E^tt l:usE/RELAyi
- -{-;;; -
I PJ,.,8.J390 i
-
T;; ;
- - - - -
I H$3,,8
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Air Delivery
- '99-'00 Models
a
r--T----.I UNDER-HOOD UNDEB-DASH
| ,ry:i.l? IFUSE/RELAY I t::u:E^tt l:usE/RELAyi
- -{-;;; -
I PJ,'.',8.J390 i
-
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- - - - -
I H$3,',8
i 1;:t"* ];FPJ", i i m'.u" se€power i "t8L,,
i t i a l'"0 r3l",lli"i:" aL--{..-----J L-J..----5::---:-J
"",":"rfi?ll, '[r;T:1"
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lr !I See Power I See Power Distnbution.I Distribution, U page 1o-9.
,, L::':l------- *Y=l
"*o "."",,t
[
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Irel-
lt
:'l-4riffi
MODECONTROLMOTOR
;L:L{;I{,tt't{ {f
SensorGround grgund
venl
Air mix5Y poientia,reTgrano9 rnrrul
gIouno
RecircSwilcfi switchcommon mput
Recirc S$,itchtED LEDcontrol common
RECIRCULATIONCONTROLMOTORPHOTO 139
CONTROLPANEL
vtEw 76
So€ Roar II Windolv :
a
Htr Ttr =tr ;l *tr :tr *,tr THtr Ttr =tr ;l *tr :tr *tr Ttr
'il
Ti
Battery lgnition Mod€ Mode Mode L4ode Mode l od€(back up) input detrost h€av heat heav vent motorR€circulato Fresh
IJ
Delogger
L------- ---J
HEATERPUSHswtTcHEs
delrost
Air Airmix mixcool hot;;-; J'J - - - J-JL i- 5:- - -
SLK
812
AFN
13
BFN
See GroundDistribution,page 14-5.
c4 t, cl
WHT I ONN
ft++il
c723
F ash/RoclreSwftch
Reclrc.oat LEo
IY
tt
L__l--tGo3,
See RearWindowOetogger
AIR MIXTURECONTROLMOTOR
(
c9 Y cl1
61-2
Page 1953 of 2189
- How the Circuit Works
'96198 Models
The air delivery system directs the flow of air used
by the heater and air conditioner systems.
Mode Selection
Mode selection is controlled by the mode switches
in the heater control panel and the mode control
motor. When you select a specific mode, voltage is
applied through the dimming circuit to the LED,
which comes on, indicating the mode selected.
Ground is orovided to the mode control motor
though that mode switch. The motor then runs until
the air control door reaches the proper position.
Fresh/Recirculation 56lection
When you press the fresh or recirculation button, a
ground signal is sent from the heater control panel
to the recirculation control motor. The motor then
runs until the recirculation door reaches the proper
position. Battery voltage is also applied through the
dimming circuit to the corresponding LED, and the
LED comes on.
Refer to the Service Manual (Section 21, Heater) for
specitic tests or troubleshooting proc€dures.
'99J00 Models
The heater control panel receives battery voltage at
all times through fuse 47. With the ignition switch in
ON (ll), voltage is supplied to the heater control
panel through fuse 17. The control panel is
grounded at G402.
The heater control panel controls the air delivery
motors, and supplies a 5 VDC reterence voltage to
the air mixture control motor.
The air mixture and mode control motors each
receive inputs trom the heater control panel. The air
mix motor regulates the mixture of cold and hot air
by varying the position of the heater-evaporator doot
The mode control motor controls the direction and
volume of outlet air. The air flow can be directed to
the dashboard vents or the corner vents.
Both the air mixture control molor and mode control
motor are grounded by the h€aler control panel.
The recirculation control motor receives battery
voltage through fuso 17 when the ignition swilch is
in ON (ll). lt regulates the position of the fresh/recirc
door, and is controlled by two position inputs from
the heater control panel ("Recirc" and "Fresh").
Refer to the Service Manual (Section 21, Heater) tor
specific tests or troubleshooting procedures.
61-3
Page 1954 of 2189
A/C Compressor Controls
- AllModels
cc5)M7
BLU/RED
?
\a
@
&cCOMPRESSORCLUTCHRELAYPHOfO 10
a
! ,acc, : POWERTRATN! arn.^-^,o..^, I or ENGINE
! ii i"i-iiii"v i.,ii.r | fi 3$18.
I A/C request ! (pCM or ECM)I (ACSJ a pHOrO a6L------J vtEw 70
REO
BEO
1
RED
BLU/FEO
2
BLU/FEO
ct31
:"1'!i'------;
Fi:rz, a ='e6-'s8: A|| moders except D1685vtEw 21 '99100: D16Y5 with l\illT'* = 96-'98: All models
ir'iio ," 99. 00: Dt6y5 wth t\4/t Dl6Bb
atcPRESSUREswtTcH
c752
c1
".,n""t 1(
".r-".rf, "tA% "
"."-:,fi tfr,]4.
v
To facing page ('96''98 models)or page 62'2 ( 99-'00 models).
-Yl
-t---------Jc353
c2'14
vtEW21
c209
A,/CCOMPRESSORCLUTCH
COMPRESSORTHERMALPROTECTOR
UNDER-HOODFUSE/RELAYBOXf-T-*-'.T'---l H53.',EPA?' i-l-------
i iflH* !F,?r",, i f6F"'.i:.",",
| tsBi":J;"#il ! a T| | oaoe 1o-9. ! I I See PowerL_J1_j:_-_j ! H Distriburion.e Y c42o i I
pase 1o-1.
***
f ifi"l'
^ see power ! |
62
!(on bracket)
Page 1955 of 2189
- '96-'98 Models
From C214 onfacing page.
v
"**il'ifr"e;
S€e FwvofDistrih$on,pags 10'11.
UNDER.HOODFUSE/RELAYBOX
HEATERco TROLPANEL----1 Dimmino
I Clrcult -
L------J
See AitDelivery'l ctte
lrcI
I
I
I
10
HEATERFANswtTcH
INDICATOR
62-1
Page 1956 of 2189
AiC Compressor Gontrols (cont'd)
- '99-'00 Models
From page 62.
v
I*"-ilii.,"r,
ihtli4
BLUAVHT
15
6LUAVHT
UNDER.HOODFUSE/RELAYBOX
Seg Pow6rDistrlbutiofl,pag€ 'l Gl1-c353PHO|O 8
l[,,*
';.!, "'""
,c,/cSwitch switchcommon itput
a,/cTHERMOSTATOlt below3"C (37"F).
THERMISTOR
(
B11A A8A B'IO |'r--:=---I A/C lgnition B€ttery II request input (backup) :
".j:[ru*,,ry "..;X
{;[
vtEW 57
HEATERCONTROLPANEL
l'lCswitch SwitchLgD IEDcodrol cormonGrouod
See AirD€livery,RgarWindowD€foggar
BIK
cl
ORN
c5
GBN
r,/cOt'llndicatof
HEATERPUSHswrTcHEs
t/cSwltch
S€e AirDelivefy,RearWindowDslogg6f
See GroundDist.ibdion,page 1,1-5.
Y
I(
=ffi;
(
.I UNDER.
I HOODi FUSE/I RELAYI Box
IJ
62-2
PHOfO 125
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
