engine coolant HONDA INTEGRA 1998 4.G Service Manual

Connector ldentification and Wire Harness Routing
Engine Wire Harness (B18Cl enginel
Connectol ol
Terminal
Number of
CavitiesLocationConnects toNotes
c 101
c102
c103
c104
c105
c106
c101
c108
cr09
c110
c'r 11
cl12
c1't3
c114
c115
c116
cl17
c118
c119
c119
c120
cI2'l
cl24
c126
c127
cl31
c132
c133
c134
10
14
3
1
2
1
2
10
2
'I
3
2
2
2
I
1
2
2
?
3
2
14
Right side of engine compartment
Right side of engine compartment
Right side of engine compartment
Right side ol engine compartment
Right side of engine compartment
Righr side oI engine
Right side of engine
Transmission
Middle of engine
Middle of engine
Right side of engine
Right side of engine compartment
Middle rear of engine compartment
Middle of engine
Middle of engine
Middle of engine
Middle of engine
i/iddle of engine
Left side ot engine
Lelt side ot engine
Middle ot engine
Middle of engine
Middle of engine
Middle of engine
Middle of engine
Left side of engine companment
Left side of engine compartment
Lelt side of engine compartment
Right side of engine
Right side of engine
Middle of engine
Middle of engine
lvlain wire harness (C221 )
Main wire harness {C222)
Main wire harness (C223)
Main wire harness (C220)
Starter solenoid
Engine coolant temperature (ECT)
sensor
Engine coolant temperature (ECT)
gauge sending unit
Back-up light switch
Distributor
Crankshalt speed fluctuation (CKFI
sensor
Engine coolant temperature {ECT)
switch
Vehicle speed sensor (VSS)
Primary HO2S
MAP sensor
Throttle position {TP) sensor
ldle air control (lAC) valve
EVAP purge control solenoid valve
Engine oil pressure switch
Alternator
Alternator
Intake air temperature llAT) sensor
No. 1 fuel injector
No. 2 fuel injector
No. 3 tuel injector
No. 4 tuel injector
Junctron connector
Engine compartment wire harness(c304)
Engine companment wire harness(c30s)
VTEC solenoid valve
VTEC oil pressure switch
Knock sensor (KS)
Intake air bypass {lAB) control sole-
noid valve
USA
Canada
T101
r 102
Left side ot engine
Right side of engine compartment
Alternator
Under-hood fuse/relay box
G 101Right side of engineEngine ground, via engine wire
naaness
23-18

)
Fan Motor Test
Disconnect the 2P connector from the fan motor.
Test the motor by connecting battery power to the
B terminal, and ground to the A termlnal.
lf the fan motor fails to run smoothly, replace it.
NOTE: The illustration shows the radiator fan.
Radiator Fan Switch Test
NOTE: Bleed air from the cooling system after installing
the radiator fan switch (see section 10)
1. Remove the radiator fan switch from the thermostat
housing.
2. Suspend the radiator fan switch in a container ol
coolanl as shown.
Heat the coolant and check engine coolant tempera
ture with a thermometer.
Check the continuity between the A and B terminals
according to the table:
23-119
Te rm Inal
Operatlon -------\
Tcmoerature ------
ON196. -203'F
(91" 95'C)
-5" 14.F i3" _8"C) ;*,*
than the temperature when
rt goes on.
SWITCH
OFF
B
-o
.-

Gauge Assembly
Component Location Index
VEHICLE SPEED SENSOR {VSSITest, page 23-128Input Test, page 23-128Replacement, page 23-130
GAUGE ASSEMBLYGauge Location Index, page 23-12:|fndicator Location Index. page 23-121Terminal Location Index, page 23-121Eulb Location, pag6 23-122Disassembly, page 23-127Removal, paqe 23-126
FUEL GAUGE SENDING UNITTest, page 23-132Replacement, page 23-132
PARKING BRAKE SWNCHTest, page 23-135
ARAKE FLUID LEVEL SWITCHTest, page 23,135
ENGINE OIL PRESSURE SWITCHTest, p6ge 23-130
ENGINE COOLANT TEMPERATUFE IECTI GAUGESENOING UNITTest, page 23-134
23-120

Gauge/lndicator/Terminal Location Index
coNNECTOR "8" (C5601
ltrii
rll
coNNECTOR "C" (Css8l
ACHOMETER:rdicates 10O rpm al
OO pulses per minutef the ignition controlrodule {lCM).
81 ------------ 816
ililllllilll
A,/T GEAR POS]TIONINDICATOR SYSTEMS€e page 23-140
c1 ------>cl0
I
Jilliltl
atespage 23-131t Test, page 23-132
^a1(
u;" u
7' /'- /n.u (,w.--
" oe)\r- -7 ttt'-1 r --
I 'l I z{.-a\y' | \-./^l
!t tr--',9I I l\-//11, I t,-\Jl
.r' to"-ei
I :rl
F<
elrle
ENGINE COOLANT TEMPERATUREGauge T€st, page 23-134Sending Unit Test, page 23'134
IECTI GAUGE:
A1 ----> A5
D1-------->D13
ililtl|illl
SPEEOOMETER:lndicates (60 mph at 1025 rpm) or
{60 km/h at 637 rpm) of the
vehicle speed sensor {VSS).
coNNECTOR "A" (C557)
coNNECTOR "D" (C5591
23-121

{
Disassembly
NOTE: Handle the terminals and Drinted circuit boards carelully to avoid damaging them.
FUEL GAUGEMOUNTING SCBEW {x 3l
e
o
SPEEDOMETER MOUNTING SCREW (x 4)ENGINE COOLANTTEMPERATURE {ECT)GAUGEMOUNTING SCREW {x 3}
t)ENGINE COOLANTTEMPERATURE IECTIGAUGE UNITTest, page 23-134TACHOMETEF UNITSpecification, page 23-121
SRS PRINTEDCIRCUIT BOARD
d'dP
METER HOUSTNG
FUEL GUAGE UNITTest, page 23 131
'
/*'
r@/ ror
6rH"
SPEEDO/ODO/TRIP METER UNTT' SPEEDOMETERSpecification, page 23-121Troubleshooting, Page 23_128. ODOMETERTroubleshooting, page 23-128. TRIP METERTroubleshooting, Page 23 128
TACHOMETER MOUNTING SCREW {x 3)
PRINTED CIRCUIT BOARD
It
23-127

Engine Coolant Temperature (ECT) Gauge
Gauge Test
NOTE: Refer to page 23-123 for the wiring description of
the engine coolant temperature (ECT) gauge circuit dia-
gram.
1. Check the No. 25 (7.5 A) fuse in the under-dash
fuse/relay box before testing.
2. Make sure the ignition switch is OFF, then discon-
nect the YEL/GRN wire trom the ECT gauge send-
ing unit and ground it with a jumper wire.
YEL/GRN WIRESENDING UNIT
Turn the ignition switch ON (ll).
Check that the pointer of the ECT gauge starts mov-
ing toward the "H" mark.
CAUTION: Turn the ignition switch OFF before the
pointer reaches "H" on the gauge dial. Failure to do
so may damage the gauge.
a lf the pointer of the gauge does not move at all,
check lor an open in the YEL or YEL/GRN wire.
lf the wires are OK, replace the ECT gauge.
a lf the ECT gauge works, test the ECT sending
unrt.
ECT Sending Unit Test
Disconnect the YEL/GRN wire from the ECT send-
ing unit.
With the engine cold, use an ohmmeter to measure
resistance between the positive terminal and the en-
gine (ground).
Check the temperature ol the coolant.
Run the engine and measure the change in resistance
with the engine at operating temperature (the radi-
ator fan comes on).
5. It the obtained readings are substantially different
from the sDecifications above, replace the ECT send-
Ing unrt.
POSITIVE TERMINAL
Temperature133oF (56oC)1850F (85.C)-
212.F (100'C)
Resistance {O)13746-30
23-134

).1
Contents
How to Use This l\.4anual 1Circuit Schematics (see Circuit Index)Fuse/Relaylnformation 6ComponentLocation Photographs 201
Connector Cavity Numbers 202Connectorldentification 203
Ground-to-Components Index 6-6Wire Harness Routing 203Circuit ldentification lor ln-Line and Fuse Box Connectors
Circuit Index
Air conditionerAir delivery 61Blower controls 60Compressor controls 62Fans 63Anti-lock brake system (ABS) 44A/T gear position indicator 89Automatic transmission controls'98199 models 39'00 models 39-4Back-up lightsHatchback 110Sedan 110- 1Brake system indicator light
USA 71Canada 71-1Brake lightsHatchback 110-6Sedan 110-7Cargo area light (Hatchback) 114-3Ceiling light 114-2Charging system 22Cigarette lighter 155
Clock 154Condenser fan 63Console lights 114Cruise control 34Dash lights 1 14Daytime running lights 110-8Door open indicator 114-2Engine coolant temperature gauge 81Engine oil pressure indicator light 72Fog lights 110-14Front parking lights 110-11Front side marker lights 110-11Fuel gauge 81Fuse/relay boxUnder-dash 6Under-hood 6-3Under-hood ABS 6-5Gauges 81Glove box light 114Ground distribution 14Ground-to-Componentsindex 6-6Hatch open indicator '114-3
Hatch opener '134
Hazard warning lightsHatchback 'l l0-2Sedan 110-4Headlights 1'10-8Headlight switch 100HeaterAir delivery 61Blower controls 60Fanswith A,/C 63without A,/C 63-2Horns 40lgnilion key reminder 73lgnition system 20
204
lmmobilizer system ('00 model) 132lndicators 80Integrated control unit 70Interlock system'98199 models 138'00 models 138-1License plate lightsHatchback 110-12Sedan 110-13Lights-on reminder 73Low fuel indicator light 74l\,4aintenance reminder light 83l\iloonroof 122Odometer 81-1Power antenna 151Power distributionBattery to ignilion switch, fuses, and relays
Fuses to relays and components 10-2Power door locksHatchback '130
Sedan 130-2Power mirrorsHatchback 141Sedan 141-1Power windowsHatchback 120Sedan 120-2Programmed fuel injection system (PGM-Fl)'98199 models 23'00 models 24Radiator fanwith tuC 63without A,/C 63-2Rear parking lightsHatchback 110-12Sedan 110- 13Rear window defogger 64Seat belt reminder 73Security system 133Speedometer Il-1Spotlights 114-2Starting syslemAutomalictransmission 21l\.4anualtransmission 21-1Stereo sound system 150Supplemental restraint system (SRS) 47Tachometer 81- 1TaillightsHatchback 110-12Sedan 110-13Trailer lighting conneclor 118Trunk lid open indicator 114-3Trunk light (Sedan) 114-3Turn signal lightsHatchback 110-2Sedan 110-4Vehicle speed sensor (VSS) 33Wiper/washerFront 91Rear 92
10
).1
I
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12Fg oAmerican Honda Motor Co., Inc. - All Rights Reserved Service Communications 275 pages

PGM-Fl ('98-'99 Models) (cont'd)
"'Fml=lltlj
.l
ff*
lt
I Fueitank TP , ti pressure R€furence sensor ECT lAf Prirnarv \
: sen:_oJ.illpln vol_p93- inpg! sensor input s€nso nput Ho_2s-iqput I
! ("Hto (u3fo4 g,E G"? ('31 €r5of) tL - - -,g - - - - - - - - ",- - 5i - - - - -;,- - - - - - i.: - - - -:Y: - - - - - -,t'u
f
--------uT-_:
[------.T------q--
-7f ceto
.ro""l .r..".r1ffi1 ".0"", I i I
| !'{ ^"...i,
! |
*I*TF[ i[-t-t'[ i I [l]"".,...*,",,
t:'** T
ii*hfi i ".""..N ;il:=
;t
ittt"lj
*"*'l
?l;*-'
..]L-----*-----'{ sr,,,,, .tr*f
-NN
1",,,
*".;.N.",.. "-']1",..
::[. ".t"
THROTTLE I'A-I ENGINE |7-I INTAKE I-FTI PRIMARYPOSITION I I I COOLANT I I IAIR I ',/ I I HEATED
$J,l,o*ff ylEUEE"l4l Fl3f35H';ii"elir
|
'l
l!t""l"" |
'f I am t,+ | I (Ho2s)
:'il ; ;'
Ul;"4,'i," Ll*.4iil"1'H",,.""
;[:.[--.
*il;*f{ I
----J"" -i-'V'
l'j;iil'.
L1",,,
*"":'1,",.. *""','tr",..
:*l;*r-"
"Jlll | :- lUi(son I yliiuH""' I ylLiWE* 13/ F lsei;b'i';3i31i,
l'l 1s"""1"" I'l lglp""" lf I lll"93:l
;T?;;;- (Fs rs Gs)SENSOB I I ISENSPHOTO 17 a | | PHOTO
g;10,,. I lJJtrtr" lJ l:,i."iY''-r'Ljf"11,
2 y Ct06 j y C120 jtr 4I ptrora 44"Jll ! cnlr arx I cnn er-x ! cnrreu ! cFN BLK
PHOTO 56tlcFN BrK
i BLK wHr
' l----------------,GRN'BLU I
c103
23-4

Automatic Transmission Controls
- '00 Model (cont'd)
[---;""'.f
-lc+os 141' c4o8 LJ-:*:IJ
|
:t
, ;:".1
*"",",1 "**-
I
-.11,[t*r'""
I .l ,.,1,","" .J,o*". i
r*ru;l
i.";-
- - -
Is"*
- - - - -
Fsil
- - -
;; I i.l{T'Fil^'- i I ;;
- -
I Ui3"*I voltage Inout
L js!'- - - - - - d": - - - - - 3t - - - - - roql j Hili:
i i-Ti*.*,*,, i F"H*i,'ll-------zrI_------16'rc4os 14tr' c408 LJ_j*::J
:tt, I ".ou.*l I I
r rii ^ r "."-,. r ^""",. r ". ::[ 9#3-
**[
[ [ X"., !r*g+;l"f-----
t
't
l;:,.il*[;,;
""T1",,,""
! ! !i;T-"{_
___-}.[1dnw'"t*il *"*-l "'o*n'l i'I---L-
I I NLi::--::::-:=a-*$$ti
.l_______l ",,, ,l ",,.
'r "*'
I_ITI ENGINE COOLANT
iddirioil I Jr l,.g:tilu;SENSOR lJJal PHora 17
c106
GFN/BLK
SERVICE CHECK CONNECTORPHOIO 76
-"^,:,[
.:
"{
'T[_:'*' "..1
;*liil, lFffi*'" I
c405
BLI
BLK I
I'
See GroundDistribution,pages 14-4and 14-5.
V
I ..
G401
39-6

Gauges
I
I
I
I
10
FUSE 25HElEN7.54
FUSE/RELAYBOX
sse Power I eloro sa
Dishibution,:pags 1&5.----.----Jc551
c559
D8(s 99 D7)
(98-'99 7)8
Seg PowerDistibution,pago l0-5.
ENGIIIE COOI-ANTTEIiPERATUNEGAUGE
I
I
t
\
\
I
,
I---------Jc559
c452PHOTO 61
c127PHOTO 36
c107
c505
c511
YEUGBN
(RS s)
YEL/GBN
10
YEUGRN
Fuel GaugeSendlng UnltFull: 2'5 ohmsEmpty: 10$110 ohms
See LowFuel lndicatorUght
FUELTANKUNITc301
11
YEUCRN
l.'n ENGINEI 1/l COOLANTI .' I TEMPERATUREI 'I I GAUGE SENDING.- UNIT- PHOfA 17PfiOrO r8 (GS B)
81