2003 HONDA CIVIC radiator fan

Power Distribution
Fuse to Components lndex
Under-hood Fuse/Relay Box
Fuse
Number
AmpsWire ColorComponent(sl or Circuit(s) Protected
'I204BLUI/ELCondenser fan motor
BLU/REDAy'C compressor clutch
15AWHT/GRNDash lights, Front parking lights, Front side marker lights, License plate
liqht, Rear side marker liqhts, Tailliqhts
7.5AWHT/BLUCarqo area liqht, Ceilinq liqhts. lqnition Kev liqht. Sootliohts
204BLU/BLKRadiator fan motor
510AWHT/BLKTurn siqnal/hazard relav, Turn siqnal liqhts
15AWHT/BLKCKP sensor, ECM, IAC valve, lmmobilizer control unit-receiver, Injectors,
PGM-FI main relav 1 and 2. TDC sensor
715AWHT/GRNBrake lights, Brake signals (to ABS modulator-control unit, Cruise control
unit, ECM)
BLU/REDi1 Orns
820AWHT/GRNABS modulatorcontrol unit
910AWHT/REDAudio unit, Data link connector (DLC), Gauge assembly, lmmobilizer
control unit-receiver, lmmobilizer indicator light. Keyless receiver unil,
lvlultiDlex control unit
1040AWHT/REDABS modulator-control unit
1130AB LK/YE LNoise condenser, Rear window defoqqer
40ABLU^^/HTBlower motor
IJ40AWHT/BLKNo. 7 fuse (in the under-dash fuse/relav box), Power window relav
1440AWHT/REDNo.2 and No.3 fuses (in the under-dash fuse/relav box)
t515AREDI/ELDaytime running lights control unit (Canada), Daytime running lights relay
{Canada), Hioh beam indicator liqht. Left headliqht
16204WHTMultiplex control unit
1715AREDDavtime runninq liqhts control unit (Canada). Rioht headlioht
1860AWHTiBLUEPS control unit
1980ABatterv. Power distribution
2040A'
50A'?
WHTlgnition switch (BAT)
* 1: USA" 2. Canada
O: Spare fuse
t t"| lll Itt 4t I
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E,l E,l E,l Eol E l f__--lI l'lr]n | |I r L__J,a ,..r^{-------l^-,
n[:]$"Lrt " N2, nf - r^l
22-46

Under-dash Fuse/Relay Box
Fuse
Number
AmpsWire ColorComponent(s) or Circuit(s) Protected
115ABLKA/VHTlgnition coils
2204WHT/REDAirlfuel ratio sensor, ECM
310ARED/BLUDaytime running Iights control unit {Canada)10ABLI(ORNAir/fuel ratio sensor relay, Alternator, CMP sensor, Cruise control main
switch, Cruise control unit. ELD unit, Evaporative emission (EVAP) bypass
solenoid valve, Evaporative emission (EVAP)canister purge valve,
Evaporative emission (EVAP) canister vent shut valve, Secondary H02S,
Vehicle speed sensor
5Not used
67.5AYEUGRNMoonroof control unit, Moonroof open and close relay, Power window
relaV
7204GRNMoonroof motor
I7.5AYEUREDAudio unit
910AGRNOPDS unit, Rear window wiper motor, Rear window washer motor, Rear
window wiper intermittent control unit
107.54YELBack-up lights, Cruise indicator light, EPS control unit, Gauge assembly,
Keyless receiver unit, Multiplex control unit, Security control unit
connector (optional)
117.5ABLIVORNABS modulator-control unit
127.5AYEUREDDaytime runnino liohts control unit (Canada)
1310APNKSRS unit't410ABLK/YE LA,,/C compressor clutch relay, Blower motor relay, Condenser fan relay,
Heater control panel, Power mirror actuator, Power mirror defogger(Canada), Radiator fan relay, Rear window defogger relay, Recirculation
control motor1ENot used
loNot used
1715AYE L/B LKECM, Fuel pump
B LK/YE L>H> Unrr
1815AYEUGRNAccessory power socket
197.5AYEUBLKTurn siqnal/hazard relav, Turn siqnal liohts
2030AGRN/BLKMultiplex control unit, Windshield washer motor. Windshield wioer motor21Not used
22204GRN/BLKPassenqer's window motor
2320A.G R N,A/VHTDriver's window motor
24Not used
25Not used
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at I
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22-47

Ground Distribution
Ground to Components Index
GroundComponent or circuit qrounded
Batterv, Transmission housinq
E ngine
G 101ECM (PG is BLK; LG is BRN/YEL)
BLK: IAC valve, lgnition coils, Vehicle speed sensor, VTEC solenoid valve
BRNA/EL: Camshaft oosition (CMP) sensor. CKP sensor, TDC sensor. VTEC oil pressure switch
G 15']EPS control unit
G201ELD unit. Multiplex control inspection connector, Multiplex control unit, Power window relay, Rear
window washer motor, Right front parking light, Right front side marker light, Right front turn signal
light, Turn signal/hazard relay, Washer fluid level sensor (Canada) , Windshield washer motor,
Windshield wiDer motor
G202ABS modulator-control unit
G301
G401
Blower motor relay, Brake fluid level switch, Condensor fan motor, Cruise control actuator, Left front
parking light, Left front side marker light, Left front turn signal light, Radiator fan motor, Radiator fan
swrtcn
Combination liqht switch, lqnitlon kev srvitch, Wiper/wasfrer sr,virch
G402Left and riqht airbaq sensors, SRS unit
G 451Data link connector (DLC)
G501Clutch interlock switchm Clutch pedal position switch (for cruise control), Cruise control main switch,
Cruise control unit, Daytime running lights control unit (Canada), Driver's door lock knob switch,
Driver's door lock switch, Driver's power window motor, Heater control panel, Left power mirror
defogger (Canada), left side turn signal light, Moonroof control unit, Monroof open and close relays,
Moonroof position sensor '1, Moonroof seitch, Power mirror switch, Power transistor, Power window
master switch. SDotliqhts
G502Accessory power socket, Gauge assembly, Keyless receiver unit, lvlultiplex control unit, Right power
mirror defogger {Canada)
G503Audio unit
G551Driver's seat belt switch, Fuel gauge sending unit, Fuel pump, Memory erase signal (IMES) connector,
OPDS unit. Rioht seat belt switch
G552High mount brake light, License plate lights, Rear window defogger, Rear window defogger noise
condenser. Rear window wioer motor, Hatch latch switch
Back-up lights, Brake lights, Rear side marker lights, Rear turn signal lights, Rear window wiper noise
condenser, Rear window wiper intermittent control unit, Taillights
22-48

Relays
Power Relay Test
Use this chan to identify the type of relay, then do the
test listed for it.
NOTE: Turn signal/hazard relay input test (see page 22-
87).
RelayTest
A'lC comoressor clutch relavNormally-open
type AAirlfuel ratio sensor relav
Condenser fan relay
Headlioht relav 1
Headliqht relav 2
Horn relav
Power window relay
Radiator Ian relay
Reverse relav
Starter cut relav
Tailliqht relaV
Daytime running lights relay
{Canada )
PGM-FI main relav 1
PGM-Fl main relav 2
Blower motor relavNormally-open
tvpe BRear window defoqoer relav
Moonroof close relayFive terminal
typeMoonroof oDen relav
Low beam cut relav {Canada)
Normally-open type A:
Check for continuitv between the terminals.
. There should be continuity between the No. 1 and
No,2 terminals when power and ground are
connected to the No. 3 and No. 4 terminals.. There should be no continuity between the No. 1 and
No.2 terminals when power is disconnected.
type 1:
type 2:
PGM-FI main relay 1
PGM-FI main relay 2
type 1:
type 2:
(cont'd)
22-51

Service Manual lndex
(cont'dl
Power Window Switch, Passenger'slnput Test .............-......
Replacement...,-.-.-...,..
Radialor Cap
Rocker Arm AssemblyRemovalD;sassembly/Reassembly
Specifications6-26 (See section 2)22-13022 13222-133..................... 6-27
ComponentLocation Index ..............22 124Circuit Dia9ram .................. ............... 22 125
Ouaner Window Glass8ep1acement ......................................... 20-29
lnstallation6-38
Rocker ArmsTestInspecton6-28
Roof MoldingsReplacement
Seat BeltsComponent Location Index ................... 23-3
Seat 8ehs, FrontReplacementrnspec!on
sRsComponent Location Index ................. 23-13Description ....................................... 23-31Circuit D;agram ... .... ...........2334lnspection/Replacemenl ................... 23 1 126-7
SRS lndicator CircuilTroubleshooting
Startel
Stabilizer BarReplacementFront SuspensionRear Suspension
Stabilizer LinksRemoval/lnstallationFront SuspensionRear Suspension
23 105oSRS UnitReplacement..-.................................... 23-122s
R
1A-1718-30
18 1818-31RadiatorTest......23-9
23-1Replacement ...........
Radiator and Condenser FansCommon CircuitTroubleshooling......... ..... .........21 29
10-310-10Seat Behs, RearReplacement
Seat Cover, FrontReplacement
Seat Cushion Cover, R6ar10-3Replacement
ReplacementTest
Test
20-75
20-84
Overhaul
Starter SolenoidTest..-.-...4-7
Radiator Fan AssemblyTestSeat, Driver'sRemovaf/lnstaf lation ............................ 20 1 1Disassembly/Reassemb1y ................... 20-73
Sedt, Faont Passenger'sDisassembly/Reassemb1y ................... 20-74
Seat, RearRemoval/lnstallation ............................ 20-80
Seat-back Cover, Reer
Starting SystemComponent Location Index...............-..... 4-3CircuitDia9ram ........................................ 4 4
\'{........................ r0-4
Radiator Fan CircuitTroubleshooting
Radiator Fan SwhchReplacementTest
Radiator Fan Switch CircuitTroubleshooting
Rear Air OutletReplacement
Circuil DiagramTest
Rear Window D€rogger WiresRepair
RearWindow GlassReplacement
Troubleshooting10-14
10-1710-17
10 16
17 -3
11-4
17-9
SteeringComponent Location Index................-..Inspectaon ...................
Steering ColumnRemoval/lnstallationReplacementInspection11 11
17-5117 5517 63
20 68
Seat-back Latch, ReaI2Q-104Replacement
Seat-back Striker. RearReplacement
Steering GearboxRemovalOverhaulRear Window DefoggerComponentLocalion Index ..............22 104lnstallation
Steering Hanger BeamReplacement
Steering LinkageInspefiron
Steering LockReplacement
Steering Rack GuideAdiustment
22-10522 106
22-106
SeatsComponent Location Index....-............ 20-70
Shift ForksInspectton13,21
20-25
2l-3621 36
21 25
Disassembly/Reassembly ................... 13-22
Shitt Lever TrimRemoval/lnstallation ............................ 20 61
.....11-12
SecirculationReplacementControl Motor17-13Test.....
Recirculation Control Motor CircuitTroubleshooting
Side Airbag, Drivel'sReplacement
Side lmpact SensorsReplacement
Spark Plugs
23-115
23 123
Side Marker LightRep1acement......................................... 22-A3
17417-6Disassembly/Reassembly ..................... 17 71nsta11ation .............................................. 17-8
SublramesReplacement
Removal
RefrigerantReplacement ..-.-.-...................... 21 53, 54, 55Test ........................................................ 21-56
Retrigerant OilReplacement...............................-........... 21-6. .._..4_19
20 112