1998 HONDA INTEGRA radiator

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
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! -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
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, 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

Connector ldentification and Wire Harness Routing (cont,d)
Connector
or
Terminal
Number ot
Cavities/
Color
LocationConnects toNotes
Engine Wire Harness (RS, LS, GS)
c101
c102
c103
c104
c105
c106
c 107
c108
c108
c'1 09
c110
c111
cl12
c113
c'114
c115
c116
c117
c118
c119
c1 19
c120
c121
c122
c123
c124
cl25
cl26
c127
Ql28
c128
c129
c 129
c130
c'l30
c131
4.GRY
1O.GRY
14-GRY
6-GRY
1.BLK
2-GRY
,1-BLK
2-GRY
2.GRY
1O-GRY
2-GRY
2-GRY
3-GRY
4-GRY
3-GRY
3-GRY
2-GRY
2.BLK
.1-BLK
4-GRN
3-GRN
2-GRY
2.BLK
2-BLK
2-BLK
2.BLK
8-GRY
2-GRY
14-GRY
3-GRY
2.GRY
2.GRY
2-BLK
3-GRY
2-BLK
2-BLK
Right side of engine compartment
Right side of engine compartment
Right side ot engine compartment
Right side of engine compartment
Right end of engine
Right end of engine
Right end of engine
Transmission
Transmission
lvliddle ol engine
Lett rear underside of engine
Right side ol engine
Rear of engine compartment
Middle rear ol engine compartment
Middle ol engine
Middle of engine
Middle ol engine
l\4iddle of engine
Middle of engine
Left end ot engine
Lett end of engine
Middle of engine
N,liddle ol engine
Middle of engine
Middle of engine
Middle of engine
Left rear corner of engine compt.
Lelt rear corner of engine compt.
Left rear corner of engine compt.
Transmission
Transmission
Transmission
Transmission
Transmission
Transmission
Transmission
Main wire harness
Main wire harness
Main wire harness
Main wire harness
Starter solenoid
Engine coolant temperature (ECT)sensor
Engine coolant temperaturegauge sending unit
Back-up light switch
Lock-up control solenoid valve Aand B
Distributor
Crankshaft speed fluctuation (CKF)sensor
Radiator fan switch
Vehicle speed sensor (VSS)
Primary heated oxvoen sensor(H02s)
MAP sensor
Throttle position (TP) sensor
ldle air control (lAC) valve
Evaporative emission (EVAP)purge control solenoid valve
Engine oil pressure switch
Alternator
Alternator
Intake air temperature (lAT) sensor
No. I fuel injector
No. 2 fuel injector
No. 3 tuel injector
No. 4 fuel injector
Junction connector
Engine compartment wire harness
Engine compartment wire harness
Shitt control solenoid valve A and B
Shift control solenoid valve A and B
Countershaft speed sensor
Countershatt speed sensor
lvtainshatt speed sensor
Mainshaft speed sensor
Linear solenoid valve
NT
[/VT
A"/T
USA
Canada
A/T (98199models)
AIT('00 model)
A,/T ('98-'99models)
('00 model)
A,/T f98-'99models)
Atf('00 model)
AN('00 model)
T101
T102
Left end of engine
Right rear corner of engine compt.
Alternator
Under-hood fuse/relay box
G'101Right end ot engineEngine ground, via engine wirenarness
o
I
203-2

Connector ldentification and Wire Harness Routing (conrd)
Connector
ol
Terminal
Number of
Cavities/
Golor
LocationConnects toNotes
Engine Wire Harness (GS-R, Type R)
c101
c102
c103
c104
U IUC
c106
c107
c108
c109
c110
c111
c112
c113
c114
c115
c116
c117
c118
c11 9
c119
c120
c121
cl22
c123
vtzl
wt10
c127
c131
c132
c133
c134
4-GRY
1O-GRY'I4-GRY
3-GRY
1 -BLK
2-GRY
1.BLK
2-GRY
1O-GRY
2-GRY
2-GRY
3-GRY
4-GRY
3-GRY
3.GRY
or BLU
2-GRY
2-BLK
1 -BLK
4-GRN
3-GRN
2.GRY
2-BLK
2-BLK
2-BLK
2-BLK
8-GRY
2.GRY
14-GRY
1-GRY
2-GRN
2-GRN
2-GRY
Right side of engine compartment
Right side of engine compartment
Bight side of engine compartment
Right side of engine compartment
Right side of engine compartment
Right end of engine
Right end of engine
Transmission
Middle end of engine
Left rear underside of engine
Right end of engine
Right end of engine compartment
Middle rear of engine compartment
Middle of engine
Middle of engine
Middle of engine
Middle of engine
Middle of engine
Left end of engine
Left end of engine
Middle of engine
Middle of engine
Middle of engine
Middle of engine
Middle of engine
Left rear corner of engine compt.
Left rear corner of engine compt.
Left rear corner of engine compt.
Right side of engine
Right side of engine
Left end of engine
Left end of engine
Main wire harness
Main wire harness
Main wire harness
Main wire harness
Starter solenoid
Engine coolant temperature (ECT)
sensor
Engine coolant temperaturegauge sending unit
Back-up light switch
Distributor
Crankshaft speed f luctuation(CKF) sensor
Radiator fan switch
Vehicle speed sensor (VSS)
Primarv heated oxvoen sensor(Hozs)
MAP sensor
Throttle position (TP) sensor
ldle air control (lAC) valve
Evaporative emission (EVAP)purge control solenoid valve
Engine oil pressure switch
Alternator
Alternator
Intake air temperature (lAT) sensor
No. 1 fuel injector
No. 2 fuel injector
No. 3 fuel injector
No. 4 fuel injector
Junction connector
Engine compartment wire harness
Engine compartment wire harness
VTEC solenoid valve
VTEC pressure switch
Knock sensor (KS)
Intake air bypass (lAB) controlsolenoid valve
USA
Canada
GS.R
T101
r102
Left end of engine
Right rear corner of engine compt.
Alternator
Under-hood fuse/relay box
G101Right end of engineEngine ground, via engine wirenarness
203-4