1998 HONDA CIVIC Heater motor

Fuse
NumberFuse NameAmpsPage
BATTERY
Component or Circult Protected
Power distribution
lgnition switch
INTERIOR LIGHT | 7.5 | 10-10 | DLC, Ceiling light, Trunk light
FI E/M15 i(20 GX) i
i PGM-FI main relay, Fuel injection relay (GX)
Not used
POWER WINDOW| 10-10 | Power window relay
BACK UPStereo radio iuner ('9G'98 mod€ls), Audio unit ('99100
models), Heater control panel, PCM/ECM, TCM (9e'98
cvr)
HEADLIGHT
REAR DEFROSTER I
DOOR LOCK UNIT,
ROOF
i 10-12i Headlights
Not used
Rear window defogger relay
Power door lock control unit (all except '99-'00 models
with keyless), Keyless door lock control unit ('99-'00
models with keyless), Moonroof
i HORN, SrOP Lri 10-13i Horn relay, Brake switch
HAZARDHazard warning switch
OPTIONI 10-13I Security system (option)
i HEATER MOTOR Ii 10-1 i Blower motor relay
(CONDENSER FAN)
COOLING FANl1o-1
Condenser Jan relay, A'lC compressor clutch relay
Radiator tan relay
&5

Ground
G402
Components or Clrcult Grounded
Arr gear position switch, ABS control unit (3 wires), Blower motor high relay ('99-'00
models), Blower motor relay, ELD unit, Heater Jan switch ('96-'98 models), Heater
control panel, Mode control motor ('96.98 models), Power transistor ('99-'00 models),
Service check connector....plus everything grounded through G401
| 14-13 | ABS pump motor
1l-9 i Stereo radio tuner ('96-'98 models), Audio unit ('99-'00 models)
Drivsr's door lock actuator, Driver's door lock switch, Drivefs window motor' Left mirror
defogger, Pow€r window master switch (2 wires), Power door lock control unit (all
except '99-'00 with keyless), Power mirror switch
G55214-9 i Driver's s€at belt switch, Fuel pump, Fuel tank unit, Right mkror defogger
G601
(Hatch-
back)
14-12 iLeft and right back-up lights, Left and right brake lighvtail lights, Lefl and right rear
turn signal lights, Left and right tail lights....plus eveMhing grounded through G761
G601 I 14-10
(All Coupesl
ano
(96198
S6dans)
High mount brake light, Left and right back-up lights, Left and right inner brake lighv
taiilights, Lett and right license plale lights, Lett and right outer brak€ lighvtail lights'
Left and right rear turn signal lights, Rear window deJogger, Trunk latch switch
G601
(99-'oo
Sedans)
G602
('ss-'00
Sedans)
G761
(Hatch-
back)
G771
(Hatch-
back)
14-11
14-12 i
High mount brake light, Left and right back-up lights, Left and right brake lighvouter
taillights, Left and right inner taillight, Left and right rear turn signal light' Rear window
deJogger (GX), Trunk latch switch
Window antenna coil
Hatch latch switch ('98-'00 models), High mount brake light' Left and right license plate
lights, Rear window wiper motor...plus everything grounded through G601
Rear window defogger
14-13 i SRS unit (2 wires)
*1 = All '96-98 models €xcept Dl685, '99100 D16Y5 with M/T*2 = '98 D1685, all '99-'00 models except Dl6Y5 with M/T
e7

I
I
-- a---
i
i
T
iTl Ill
Irl
ll
tl
MOOECONTROLMOTORPage 61-1' o( 61-2
a
r--1 PowER| | utnnon ;| | swrrcH ;L--J Page l4l 'vtEw 33
- - - '96-'98 models --rand all GXmooers
FUSE 17H€ATENI,/C FEI,AY7,5A
16
c420
vtEw 53
c3s2
r::'l
I uorr I
tl
BLOWERMOTORRELAYPage 60or 60-1PHO|O9 '.a-4.1
I uorr I
tl
A,/C
CLUTCHNELAYPage 62
UNOER-DASHFUSE/RELAYBOX
ia;ij
tl
NAD|ATOR
\
\
I
(NotUsed)
BLK,YEL
't6
BLI(YEL
c440
vlEw 45
BLK/ryEL
'96198
models
'9$'00
mod€ls
I
c?23
vtEw 57 '
ALKTYEL
c723
vlEW 57
atK
2^
1l
ll
HEATERCONTROLPANELPages 61,62-1, and63-1
H EATERCONTROLPANEL
60-1,61-2,62 2,63 2,and 64- 1
TION A/CTHERMOSTATPages 62-1,62-2,63-1,and 63 2PAO|O 82 f96- 98)
NELAYPage 63
UNDER.HOODFUSE/RELAYBOX
ssgj
lTlA/cI I I DIODE
l+,PHoro1t.lEf
Y
r::'r
I uorr I
ll
CONDENSENFANRELAYPage 63
COMPRESSON FAN
-.i--. :
:t:
:l:
:l:
: l,T.il i
:l:
: ,Jl i, r--'t '
:l l:,t t:. L-.J ;; BLOWEn ,, MOTOR. HIGH' RELAY :: Page 60-1 ,, (See S/l\, 'I page 21-3) '
1_ 'ss,'oo lmooets
r--1
tl
ll
RECIRCULATI(CONTROLMOTORPage 61 or 61,2
10-9

- G402
NOTES:
. Wires shown without color codes are black.
. On '97-'00 models, G402 may be represented by the use of a junction connector or ring terminals.
with ABS - - - - - I
. ABS CONTROL I' ultt '
HEATERCONTROL HEATER HEATER
iili, BB-'fi",. Eiff* 5fi::g PowER i,8;g'"'
;;; ;;; MoroR ;il--"'. ;;1-;; rRAN- H|GH
!if,6f1- ease ot-t Ino b5-.t ' fi i *- slsroR FELAY- ,pHaTa t3z pHoro 70 photoT. iioro ^ Page 60-1 Page 60-1vtEw 76 vlEW 17 V|EW 44 V|EW11 PHOTO139 PHOTO 83
r-1r-.!r-1r-1r-.|r-1
| | | | | | rl I lll
| | | | | | I ll ll IL-J L-J L-J L.J L-J L-J
Page 44PHOTO 85vtEW 63
I
I------J
I""IJ
Ifnn*"1 r'[
1"""LI'--- A/l ---_r
i , m cean; I POStflON, : swrrcH :' , Pages 34-3, 39-3, :' | 39-7,39-11,39-15,;: ' 89, 89-1, 138, and ,
; : 138-1| | PHO|OIA :' , F-'t .
'99-'00
mooel
'96-'98
moo€ts
'9G'S
mod6ls
'99-'00
modol
a
12c440
vtEw 45
FromG401on page14-6.
v
l-
SERVICECHECKCONNECTORPages 23-3,24-3,25-3,39, 39-4, 39-8,39-12,44-1,afid 47
c402
I
I
3 cass
l;l:,12,
li
rc i UNDER-HOOD, FUSE/RELAYBOXPHAfa 7
I elecrRrca- |I LOAD BLOWER I: DETECTOR MOTOR iI (ELD) RELAY II UNlf Paoe 60 |
a W.': :;ffil iI r-r F-'r I
tt | | | |
tr | | | |I L-J L-J I
i 'r Y iL--+---J--J
I
'I&%,14.,I
14-5

- '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

I
MODECONTROLMOTOR
;T
___"rt
1[
___l:il
,rlK
YEUBEO
_:o_
YEUBED
8t
HEATERCONTROLPANEL
I
I
I
t
\.l
t
lleatSwltch
c723
138
it
VenlSwltch
\
I
I
I
I
c723
S9e GroundDistribution,page 14-5.h
-_l
G402
:",;[----
1
61-1

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$3,',8
i 1;:t"* ];FPJ", i i m'.u" se€power i "t8L,,
i t i a l'"0 r3l",lli"i:" aL--{..-----J L-J..----5::---:-J
"",":"rfi?ll, '[r;T:1"
-",*"1-J
*-*..l
,n", ".u I lt I
lr !I See Power I See Power Distnbution.I Distribution, U page 1o-9.
,, L::':l------- *Y=l
"*o "."",,t
[
*,:.'.Y%
Irel-
lt
:'l-4riffi
MODECONTROLMOTOR
;L:L{;I{,tt't{ {f
SensorGround grgund
venl
Air mix5Y poientia,reTgrano9 rnrrul
gIouno
RecircSwilcfi switchcommon mput
Recirc S$,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

- 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