2002 HONDA CIVIC power

Heating and Air Gonditioning
Blower Unit Removal and Installation {cont'd}
Remove the steering hanger beam bracket cover
from the right side of the glove box opening, then
remove the bolts and the olove box frame.
1.
8.
9.
Remove the ECM (see page 11-4).
Remove the EPS control unit (see page 17-67).
Disconnect and remove the PGM-Fl main relays
and bracket assembly, then remove the ECM
bracket.
Disconnect the connectors {A) from the blower
motor and the power transistor, then remove the
wire harness clips (B) and the connectors (C).
Remove the self-tapping screws and the bracket (D).
A
21-40
10. Disconnectthe connector {A) from the recirculation
control motor, then remove the wire harness clip
{B). Remove the mounting bolts, the mounting nuts
and the blower unit (C).
6x 1.0 mm I9.8 N.m (1.0 kgt.m,7.2 tbt.ftl
6x1.0mm9.8 N.m (1.0 kgf.m,?.2 tbf.ft)
11.
14.
Installlhe unit in the reverse order of removal.
Make sure that there is no air leakage.
Reconnect the negative battery terminal.
Do the engine control module (ECM) idle learn
procedure {see page 11-139).
Enter the anti-theft code for the radio, then enter
the customer's radio station presets.
\
'13.

Blower Unit Components Replacement
Nole these items when overhauling the blower unit;
' The recirculation control motor (A), the power transistor (B), the blower motor (C), and the dust and pollen filtefs (D)
can be replaced without removing the blower unit.. Before reassembly, make surethatthe recirculation control linkage and doors move smoothly.. After reassembly, make surethe recirculation control motorruns smoothly (see page 2j-36).
A
21-41

Heating and Air Conditioning
Heater Unit/Core Replacement (cont'd)
8. Remove the dashboard {see page 20-66).
9. Disconnectthe connectors (A) from the blower
motor, the recirculation control motor, the mode
control motor, and the power transistor, then
remove the wire harness clips (B) and the
connector (C). Remove the self-tapping screws and
the bracket (D).
Disconnect the connectors (A) from the evaporator
temperature sensor and the air mix control motor,
then remove the wire harness clips (B) and the
connector (C). Remove the self-tapping screw and
the cover (D). Disconnect the heater valve cable (E).
10,
7t,
21-44
11. Remove the mounting bolts, the mounting nuts,
and the heater unit.
Remove the self-tapping screws and the expansion
valve cover (A). Carefully pull out the evaporator
core (B) so you don't bend the inlet and outlet pipes.
Remove the grommet (C), then remove the self-
tapping screws and the flange cover (D). Bemove
the self-tapping screws and the pipe cover (E), then
carefully pull out the heater core (F) so you don't
bend the inlet and outlet oioes.
@
5x 1.0 mm9.8 N.m11.0 kgl m,7.2 tbf.ftl
12.

\Body Electrical
Body ElectricalSpecialToolsGeneral Troubleshooting tntorrnaiion.'......
Relay and Control Unit Locations .....
Connectors and Harnesses
Fuse/Relay Boxes ...............................
Power Distribution .............................
Ground Distribution ...........................
Under-dash Fuse/Relay Box ..............
Battery ..............
Relays ................
*lgnition Switch ..............
*Gauges
Component Location Index .......................Self-diagnostic Procedure ..........................Circuit DiagramGauge Bulb Replacement ..........................Gauge Assembly ReplacementCoolant Temperature
Gauge Troubleshooting .... ....................Vehicle Speed Signal CircuitTroubleshootingVSS Replacement
Exterior LightsComponent Location Index .......................Circuit DiagramDaytime Running Lights ControiUnit Input Test (Canada) ........................Headlight Ad,ustment .................. .. .....Headlighr Replacement ..............................Combination Light SwitchTest/ReplacementBulb ReplacementTaillight Replacement ..........................High Mount Brake Light Replacement ......License Plate Light Replacement ..............Side Marker Light Replacement ................Brake Pedal Position Switch Test ..............Side Turn Signal Light Replacement ........
Turn Signal/HazardFlasher SystemComponent Location Index .......................Circuit DiagramTurn Signal/Hazard Relay lnputTest ........Hazard Warning Switch Test
22,3
22-7
22-13
22-44
22-46
22-4A
22-49
22-50
22-51
22-53
22-5422-5622-5422 6322-64
22-64
22-6522 61
22-6822--71
22-7 622-7422-79
22-AO22-4122-8222-4222-4322-4322-4422-84
22-8522 A622-8722-88
22-10422-105
22-10622-107
Entry Lights control systemComponent Location Index ....................... 22-89Circuit Diagram ......... 22 90lgnition Key Switch Test .....................,...... 22-9'llgnition Key Light Test ............................... 22-91Control Unit Input Test ..........,.................... 22 92
Interior LightsComponent Location Index ....................... 22-94Circuit Diagram ......... 22-95Ceiling LighVSpotlightsTesVReplacement ................................... 22-96Rear Ceiling Light TesVReplacem ent ........ 22-96Cargo Area Light Test/Replacem ent ......... 22-97Hatch Latch Switch Test ..,..,....................... 22-97
*Audio SystemComponent Location Index ....................... 22-98Circuit Diagram ......... 22,99Audio Unit Removal/lnstallation ............... 22-1OOAudio Unit Connector Replacement ......... 22-101Speaker Replacement ................................ 22-102Roof Antenna Rep1acement ....................-.. 22-103
Rear Window DefoggerComponent Location Index ...........Circuit Diasram .. ....... .. ..... ....... ...:::::.::.::.Function TestDefogger Wire Repair .................................Noise Condenser CapacityTest ................
MoonroofComponent Location Index ....................... 22-1OBCircuit Diagram ......... 22-109Moonroof Control Unit Input Test ............. 22-'l10Switch TesVReplacement ........,.....,........... 22-1 12Motor Test ................. 22-112Limit Swilch Test ...... 22-'l'13Auto-stop Switch Test ................................ 22-1 13
Power MirrorsComponent Location Index ....................... 22-114Circuit Diagram ......... 22-115Function Test ............. 22-116Power Mirror Switch Test .......................... 22-ll7Power Mirror Actuator Test ....................... 22-117Power Mirror Actuator Replacement ........ 22-11A
* HornsComponent Location Index ....................... 22-120Circuit Diagram ......... 22-121Horn TesVReplacement ...........................-. 22-122Horn Switch Test .,.... 22-122
\

Power WindowsComponent Location Index ..........
circuit Diagram . .. ............... .........:.::::.::::.:Master Switch Input Test ...........................Master Switch TestDriver's Window Motor Test .....................
Passenger's Window Switch lnput Test ...Passenger's Window Switch Test .............
Passenger's Window Motor Test ..............
lMaster Switch Replacement ......................
Passenger's Window SwitchReplacement
Wipers/WashersComponent Location Index .......................
Circuit DiagramRear Window Wiper Intermiftent
Control Unit Input Test ...........................Wiper/Washer SwitchTesVReplacementControl Unit Input Test ...............................Wiper Motor Test
Washer Motor TestWasher Fluid Level Switch TesV
Replacement (Canadal ..........................
Windshield Wiper Motor Replacement ....
Rear Window Wiper MotorReplacementWasher Reservoir Replacement ................
Washer Tubes Beplacement ......................
Accessory Power SocketCircuit Diagram ......... 22-149
Accessory Power Socket
TesVReplacement ................................... 22-1 49
Keyless/Power Door Lock System
Component Location Index ....................... 22-150
Circuit Diagram ......... 22-151Keyless Receiver Unit InputTest ............... 22-153
Control Unit Input Test ............................... 22-155
Door LockActuatorTest .........,.......,..,.,..... 22-158Hatch LockActuatorTest ........................... 22-159
Door Lock Knob Switch Test ...................... 22-160
Door Lock Switch Test ................................ 22-160
Transmitter Test ....... 22-161
Transmitter Programming ......................... 22-161
Multiplex Control SystemComponent Location Index ...........
circuit Diagram ...... ........................::.:..:.::.:
Svstem DescriDtionTroubleshootingMultiolex Control Unit InDut Test .............
22 12422-12522-12622-12822-129
22- t30
22-13222 13222-133
22-133
22-134
22-138
22-14022-14122-14322-144
22-14422-145
22-14622-14622 147
22,16422-16922-17'l22,11222-175
lmmobilizer Systemcomponent Location Index ...........
System Description ....... ............. ..:..:..:.:...
Circuit DiagramTroubleshootinglmmobilizer Control Unit-Receiver Replacement ...........................
22-16222-16322-164
22-167

Body Electrical
General Troubleshooting Information (cont'dl
Five-step Troubleshooting
'1. Verify The Complaint
Turn on allthe components in the problem circuit
to verify the customer complaint. Note the
symptoms. Do not begin disassembly or testing
until you have narrowed down the problem area.
2. Analyze The Schematic
Look up the schematic for the problem circuit.
Determine how the circuit is supposed to work by
tracing the current paths from the power feed
through the circuit components to ground. lf
several circuits fail at the same time, the fuse or
ground is a Iikely cause.
Based on the symptoms and your understanding of
the circuit operation, identify one or more possible
causes of the problem.
3. lsolate The Problem By Testing The Circuit
Make circuit tests to check the diagnosis you made
in step 2. Keep in mind that a logical, simple
procedure is the key to efficient troubleshooting.
Test for the most likely cause of failure first, Try to
make tests at points that are easily accessible.
4. Fix The Problem
Once the specific problem is identified. make the
repair. Be sure to use proper tools and safe
proceoures.
5. Make Sure The Circuit Works
Turn on all components in the repaired circuit in all
modes to make sure you've fixed the entire
problem. lf the problem was a blown fuse, be sure
to test all of the circuits on the fuse. Make sure no
new problems turn up and the original problem
does not recur.
22-6
Wire Color Codes
The following abbreviations are used to identify wire
colors in the circuit schematics:
wHT....................,.,.............
YEL......................,,.......,......
B1K......................................
BLU ....,................................
GRN.....................................
RED ....................................,
oRN.....................................
PNK..........................,..........
BRN.....................................
GRY....................................,
PUR.....................................
1T81U..........................,.....
1TGRN...........................,...
White
Yellow
Black
Blue
Green
Red
Orange
Pink
Brown
Gray
Purple
Light Blue
Light Green
The wire insulation has one color or one color with
another color stripe. The second color is the stripe.

Relay and Gontrol Unit Locations
Dashboard
_DAYTIME RUNNING LIGHTS EELAY lCanada)lWire colorsr RED, RED/YEL, ILRED/BLK and RED/8LU I_LOW BEAM CUT RELAY lcanada) _lWire colors: REDMHT, RED/BLK, ILBEDA/EL and RED/BLU I
KEYLESS RECEIVER UNIT
CRUISE CONTROL UNIT
'
'-.:- ':
..? ;,
POWER WINOOW RELAY
TURN SIGNAL/HAZARD RELAY
TAILLIGHT RELAYUNDER.DASHFUSE/RELAY BOX; .[:_- -
-l:r --
22-8
MULTIPLEX CONTROL UNIT

Relay and Control Unit Locations
Door and Seat
Driver's Door:
Passenger's Seat:
l\:
].\
POWER WINDOW MASTER SWITCHlHas built-in control unit)
22-12