radiator HONDA INTEGRA 1998 4.G Repair Manual

)
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
.-

Cruise Gontrol
1.
Actuatol Assembly Test
Disconnect the 4P connector from the actuator.
Check that the output linkage moves smoothly.
Connect battery power to the D terminal and ground
to the A terminal.
ACTUATOR
Check tor a clicking sound from the magnetic clutch.
and that the output linkage is locked. lf the outputlinkage is not locked, replace the actuator assembly.
Check the operation of the actuator moror In eacn
output linkage position according to the table (you
should be able to hear the motor).
FULLY CLOS€D
2.
3.
3.
23-264
Actuator Cable Adjustment
Check that the actuator cable operates smoothly
without binding or sticking.
Start the engine, and warm it up to normal operat-
ing temperature (radiator fans come on twice).
Measure how far the output linkage moves from thefully closed position. Free play should be 11 t 1,5mm (0.43 t 0.06 in).
FREE PLAY:1M.5 mm (0.43 1 0.06 in)
FULLY CLOSED POSITTON
4. lf the free play is not within specs, loosen the lock-
nut, and turn the adjusting nut as required.
NOTE: It necessary, check the throttle cable (see
section 1 1), then recheck the output linkage lreeplay.
5. Retighten the locknut, and recheck the free play.
^ffi"
c17i l,io
Battery
polaritiesOutput linkage
position
ooFULLY
CLOSED
MIDDLE
POSITION
FULLY
OPEN
c
Terminal
B
Terminal
The
moror
runs.
The
molor
runs.
The
motor
stops.
B
Terminal
c
Terminal
The
motor
stops.
The
motor
runs.
The
motor
runs.
{

).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
Xr
12Fg oAmerican Honda Motor Co., Inc. - All Rights Reserved Service Communications 275 pages

Fuse/Relay I nformation
- Under-hood Fuse/Relay Box (cont'd)
Fuse
NumberFuse NameAmpsPage
BATTERY
I INTERIOR LIGHT
I
1 7.5 110-7 I
I
Component or Circuil Protected
Power distribution
lgnition switch
DLC, Ceiling light, Power antenna motor (Hatchback),
Trunk/cargo area light
47
I Fl E/lvl
POWER WINDOW
I BACK UP (RADTO)
I
15 | 1 0-7 I PGM-FI main relay
Not used
Power window relay
Clock, ECM or PCM, Maintenance reminder unit, Stereo
radio cassette player, TCM ('98-'99 Models with A'/T)
7.5 |10-8
I HEADLIGHT| 40 | 10-8 | Headlights, Interlock system (A/T)
49i DR LOCK,
i suNRooF
10-9 i Moonroof
I
I RR DEFROSTER
+ B SMALL
I Rear window detogger relay
I Dash and console lights, License plate lights,
I Rear parking lights, Taillights
I HORN, STOP
i HAZARD
10-9 | Brake switch, Horn relay
i Gauge assembly ('00 Model), Hazard warning switch
40 | to t I Power door locks, Security system (option)
I HEATER MOTOR II t 0-1I Blower motor relay
20 I 10-1 ; A,/C compressor clutch relay, Condenser fan relay
i Radiator fan relay1 0-1
6-4

Ground-to-Components I ndex
NOTE: All ground wires are BLK unless otherwise noted.
GroundPageComponents or Circuit Grounded
Battery (BLIVYEL)
--t'I Valve cover (BRN)
G101t.+
and
14-1
Daia link connector (BRN/BLK), Engine or powertrain controt module (pct and pG2
are BLK; LG1 and LG2 are BRN/BLR, IAB controt solenoid valve (GS-B),
lmmobilizer receiver unit ('00 Model) (BRN/BLR, PGM-Ft main retay, Radiator fan
switch, Transmission control module ('98.99 Models with MD (2 BRN/BLK wires),
Vehicle speed sensor, WEC pressure switch (GS-R, Type-R)
Shielding between the ECM or PCM and these components (all have BRAIDED wires):
CKF sensor, Primary and secondary heated oxygen sensors, Knock sensor (GS-R,
Type-R), TDC/CKP/CYP sensor
Shielding between the TCM ('98-'99 Models) or PCM ('00 Model) and these components(all have BRAIDED wires): Countershaft speed sensor, Mainshaft speed sensor
G1s1 ii Condenser fan motor
Brake fluid level switch, Cruise control actuator, Left front parking/turn signal light, Left
front side marker light, Left headlight, Power steering pressure switch (USA), Rear
window washer motor (Hatchback), Windshield washer motor, Windshield wiper motor
14-3
Blower motor relay, ELD unit, Badiator fan motor, Right front parking/turn signal light,
Right front side marker light, Right headlight.....plus everything grounded through G401
ABS fail-safe relay, ABS pump motor
G40114-4
ano
l4-c
A,/T gear position switch, Cigarette lighter, Clutch switch (M,/T), Ctock, Ctutch interlock
switch (MfD, Combination wiper switch (2 wires), Cruise control main switch, Cruise
control unit, Dash lights brightness controller, Data link connector, Daytime running
lights control unit (Canada), Front passenger's door key cylinder switch, Frontpassenger's door lock switch, Gauge assembly (2 wires), Glove box light, Heater
control panel, Heater tan switch, lgnition key switch, Integrated control unit, Interlock
control unit (AfI), Maintenance reminder unit, Mode control motor, Moonroof relay,
Moonroof switch, Parking pin switch (AfD, Power window relay, Rear window defogger
switch, Service check connector, Turn signal/hazard relay.....plus everything grounded
throuoh G201
Driver's door key cylinder switch, Driver's door lock actuator, Drivels door lock switch,Driver's seat belt switch, Fuel pump (BLI(/WHT), Fuel tank unit (BLI(/WHT), power doorlock control unit, Power mirror switch, Power window master switch (2 wires)
Hatch key cylinder switch, Hatch latch switch, Hatch opener actuator, Hatch ooener
switch, Left and right back-up lights, Left and right brake light/taillights, Lett and right
rear parking lights, Left and right rear turn signal lights, License plate lights, power
antenna motor, Trailer lighting connector..... plus everything grounded through G751
6-6
'14-8G503
(Sedan)
High mount brake light, Left and right back-up lights, Lett and right inner brake tighv
taillights, Left and right outer brake light/taittights, Left and right rear parking tights, Leftand right rear turn signal lights, License plate lights, Rear window detogger, Trailer
lighting connector, Trunk latch switch

I
I
I
IJ
UNDER-HOODFUSE/RELAY BOXI
\
\.t)-
FUSE 528OFN,STOP
FUSE 53HAZARO
I'_'I ALTERNATOB
See PowerDistribution,page 10-9.
| | Pase 22
| | PHoro 31
L--J
1102
T101
FUSE 55HEATEF MOTOB
UNDEB.HOOOFUSE/RELAYBOX
FUSE 56(CoNDENSEA FAtl)204
c904
FUSE 13FUELPUTiP(sB6 UNrr)
I
I
tc907
r--'t BLowER\. tContactl MO-IOR
!ilF"'s?60RELAYI rdq€ @I L--J eudro zz
FUSE 54{oFnon)
."-'1tr;'
FUSE 57COOUNG FAX204
c9)6
r^- -:I RADIATOR
!"o"'""' ! Etto"! | Page 63 or 63.2L--J Pqofo ?2
c90s
r--1coN- r--1A'/CCOM-I Contactl DENSER I Contactl PRESSOR
! IFAN : ; CLUTCNI I RELAY I I RELAYL - - J Page 63 L--J Page 62
-- - -'l UNOER-i-
i I ruser ' rusez 'rusEo I if99Ff.
i ) &*'s"-, ,lil?l, , $?'"r I ii,At:
L -J- --- lLg%- ? J..9Yl--:1,- j
se€ Power l[:'^. l[:'^, 3!I$f"totDiskibution. ubEu/ uJcv / (+B)page 10-2.
c922
UNDER.DASHFUSE/RELAY BOXPHOfa 58
,rar ra !t#
i t FUSE st FusE 3I dcr{ rFRwtPE {tG

nn WIPEF

fis., fllo"o.".",
I
FUSE 12TUfNLIGTITSr0A
FUSE 'I5
ALlERNATOf,sP sENSoa7.tA
FUSE 19BACK UPUGHTSt.5a
FUSE 24
REIAY€rrNBooFNEIAY)?.3A
FUSE
25II€TEF7.5A
FF WPEBFA U'ASHEN204
4y--J---J
.l STEERINGI LOCK
I
I
I
J
! -l tanfiton,. ( t--) lsiwitctr
".r\l:'S7ili"'l
lf 0 ltttt I
a------rl-
l;9c* ('-' oa"t0)
--
See PowerDistribution,page 10-2.
See Power Distribution,pages 10-2 and 10-3.See Power Distribution,pages 10-4 and 10"5.
10-1

Fans
- with
|------
See PowerDistribution,page 1G6.
;;;----13X3,5"
l,fP"[r s"" eo'""t
A/C -
E@
UNDER.HOODFUSE/RELAYBOXDistribution,
FUSE 56(coxoEr{sE8 faN}FUSE 57COOLING
204
FUSE/RELAY
2
(Not
I
I
I
I
IL
I Y C439sucrel ll PHoro"62rrr.
orl
*T'.I.
:-gg]gi Ji,'oio,,,
Seg PowerDistribution,page 10.6.c216y":':---______i
See PowerDbtribution,page lG1.
c2'16 1
BLKBEO
' POWERTRAIN ,
: or ENGINE, CONTROL ::,::A ,. ' MODULE ;(PCM or ECM) ,' PHOIA 77 (9A 99 |' PHofa 14a $q :!---- usA.----
COI{DENSERFANRELAYPHOTO 23
RADIATORFANRELAYHlofa 22
c215-----J
* '98199 [,4odels
cltl8LU/BLK
c9{t6
c206
c206
ffi-
".",".t"f
"oo' 6
i
v
To Splice onfacing page
c151
c155
BLU/BIK
BLU/ALK
CONDENSERFANMOTOR
RADIATORFANMOTOR
RADIATORFAN SWITCHClosed above93"C (200"F).
".:r
"'''
I see c,ornoarr< Distribution,
".,.f
','"i.
-lr:;--: PHafo 28
c155PHOTA 9
See GroundDistribution,page 14-2
Y
I
63
I. G151

Fans
- Without A/C
UNDER-HOODFUSE/RELAYBOX
r--------UNDER-DASHFUSE/RELAYBOXFUSE 57cooLrfic FAx2oa
a4 Distribution,
_ ' Cg(F
ll Pase 106'BLK,YEL I
. A """?t'3"---------JI Soe Powgri------{' Distribution,
I page 10-6./\-_--_--
'I
GBN
RADIATORFANRELAYP|1OTO 22
: l__
ru::
.i
-d*"^
ffil u
(Not Used)---?f;---------==:
I (Nor Used)BLUT'EL
f
"
f,r;.;
.l "oo, I
'[TliiF:,- il
"'*,'
-r-I I "-'" I
i*'Er t: 11,c402 i
*-
:lI' Btu'RED I er-uraeo I
i 3__J
:ilt; ".r,".o I
i ,, I "oo.: (. s) x (c4oe -)
l---rNTl:,oll,ffIE '"
: Used) I CoNTROL' I MODULE
: | (PcM or EcM). I PHA|O 77 (98 99):_----- PHOTO 140 taAl.,
)8 '99 Models
(Not Used)
?i-------=
,.'! rN(
. I .oo,PF.IA/c
Lf l"r,i"r,B%
ItlI .t. l
.:x
*::_,"."
24
t_
l'*
c301
PHOTO36
t9
GBN
See GroundDistribution,page 14-2.
I
I
_l
, r27) A C408
i r-;--, I iiiir o
; I FAN. I control;t, L----
I'irl RAOIATORI t I FANswtrcH
l{-cl 9J3?39,"-"e e3 c (2oo F)
1 Y c11r
"*l
Orr< See GroundI Distribution,BLK
L/-4
eaee 14.
1FJ::.,"
usA ---.
* '98
._____.-'.1!;;6i-
PHO|O 4
63-2

Fans (cont'd)
- How the Gircuit Works
When the ignition switch is in ON (ll), voltage is
applied to the coils of the radiator fan relay and the
condenser fan relay (with A,/C) through fuse 17.
Whenever a ground is provided to the radiator fan
relay and condenser fan relay, the relays are
energized, turning on the radiator fan motor and
condenser fan motor. The relays can be grounded
by the radiator fan switch, engine or powertrain
control module (ECM or PCM) (USA), or the A,/C
and heater lan switches via the A'lC pressure switch
and the A,/C lhermostat.
A,/C Thermostat
The A,/C thermostat is located on the evaporator
housing. The A/C thermostat turns oft the A/C
compressor clutch it the temperature at the
evaporator goes below 3'C (37"F). This prevents
condensalion from freezing on the evaporator fins
and blocking the air delivery into the passenger
compartment. lt the temperature goes below 3'C
(37'F) turning off the A"/C thermostat, and the
BLU/RED wire at the A,/C diode was the only wire
providing ground to the condenser and radiator
fan relays (A,/C switch on, heater fans switch on,
radiator fan switch open, and ECM or PCM fan
controi output not grounded), the relay will
deenergize removing voltage from the condenser
and radiator fan motors causing them to stop
running.
A,/C Pressure Switch
The AJC oressure switch is located in the condenser
outlet line where refrigerant is in a high
temperature/high pressure liquid state. The A,/C
switch turns off the A,/C compressor clutch if it
senses abnormally high or low pressure. lf the A'lC
pressure switch opens, and the BLU/RED wire at
the A/C diode was the only wire providing ground
to the condenser and radiator fan relays (L/C switch
on, heater fans switch on, radiator lan switch open'
and ECM or PCM fan control output not grounded),
the relay will deenergize removing voltage from the
condenser and radiator fan motors causing them to
stop running.
A./C Diode
This diode orevents the radiator fan switch f rom
grounding the "A'lC ON" input to the engine or
powertrain control module (ECM or PCM).
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
63-3

Gauges (cont'd)
- How the Circuit Works
When the ignition switch is in ON (ll) or START (lll),
battery voltage is supplied through fuse 25 to the
gauges in the gauge assembly.
Speedometer and Odometer
The odometer and speedometer drive circuits
receive pulses lrom the vehicle speed sensor
(VSS). The pulse rate increases as the car
accelerates. The frequency and duration of these
input pulses are measured and displayed by the
speedometer, odometer and tripmeter.
Tachometer ('98-'99 Models)
The tachometer drive circuit receives oulses from
the ignition control module (lCM) in the distributor
assembly. The solid-state tachometer then displays
these pulses as engine speed. For each 200 pulses
per minute from the ignition control module (lCM),
the tachometer displays 100 RPM.
Tachometer ('00 Model)
The tachometer drive circuit receives pulses f rom
the PCM or ECM. The solid-state tachometer then
displays these pulses as engine speed. For each
200 oulses oer minute trom the PCM or ECM the
tachometer displays 1 00 RPM.
Engine Coolant Temperature Gauge and Fuel
Gauge
The engine coolant temperature gauge has two
intersecting coils wound around a permanent
magnet rotor. Voltage applied to the coils, through
fuse 25, generates a magnetic field. The magnetic
field, controlled by the engine coolant temperature
gauge sending unit, causes the rotor to rotate and
the gauge needle to move. As the resistance in the
sending unit varies, current through the gauge coils
changes. The gauge needle moves toward the coil
with the strongest magnetic tield. The fuel gauge
works the same way.
The engine coolant temperature gauge sending
unit's resistance varies from about 137 ohms at low
engine temperature to between 30-46 ohms at high
temperature (radiator fan running).
The fuel gauge sending unit's resistance varies from
about 2-5 ohms at full, to about 110 ohms at empty.
When you turn the ignition switch to LOCK (0), the
gauge remains at the last reading until you turn lhe
ignition switch to ON (ll) or START (lll) again.
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
81'2