ect HONDA CIVIC 2003 7.G Workshop Manual

7. To complete the charts:
. Markthe deliverytemperature along the vertical line.
. Mark the intake temperature (ambient air temperature) along the bottom line.
. Draw a line straight up from the air temperature to the humidity.
. Mark a point 10 % above and 10 % belowthe humidity level.
. From each point. drawa horizontal line across the delivery temperature.
. The delivervtemperature should fall between thetwo lines
. Complete the low-side pressure test and high-side pressure test in the same way.
. Anv measurements outside the line may indicate the need for further inspection.
kPa(ksl{cm')Lpsrl
2500 -
[25) _360l
1500 -
{1s},21o)
1000 -(101:1401
500 -
{5)171l
DELIVERYPRESSURE
80 yo
a0 0/"
HUMIDITYLEVEL
30 9o
30%
80%
{kgflcm')Lpsil
600{6ttssl
2000(2011280
fcl
100{11h4l
INTAKEPRESSURE
OELIVERYTEMPERATURE
.F
{'cl
I104{40)95(35)
I86t30)
I77t25l68t20l
INTAKE TEMPEBATURE
21-59

\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
\

Body Electrical
SpecialTools
@
Ref. No.Tool NumberDescription Otv
Q)
o)
o
07wAz-001010A
O7 LAJ - PT3 O 2OA
07TAz-001020A
MPCS Service Connector 1
Test Harness 1
Back Probe Adaotet 1
22-2

General Troubleshooting Information
Tips and Precautions
Bef ore Troubleshooting
1. Check applicable fuses in the appropriate fuse/relay
oox.
2. Check the battery for damage. state of charge, and
clean and tight connections.
. Do not quick-charge a battery unless the battery
ground cable has been disconnected, otherwise
you will damage the alternator diodes.. Do not attempt to crank the engine with the
battery ground cable loosely connected or you
will severely damage the wiring.
Handling Connectors. Make sure the connectors are clean and have no
loose wire terminals.. Make sure multiple cavity connectors are packed with
dielectric grease (except waterti ght connectors).. All connectors have push-down release type locks (A).
Some connectors have a clip on their side used to
attach them to a mount bracket on the body or on
another component. This clip has a pull type lock.
Some mounted connectors cannot be disconnected
unless you first release the lock and remove the
connector from its mount bracket (A).
Never try to disconnect connectors by pulling on their
wires; pull on the connector halves instead.
Alwavs reinstall Dlastic covers,
Before connecting connectors, make sure the
terminals (A) are in place and not bent.
(cont'd)
22-3

Body Electrical
General Troubleshooting Information (cont'd)
Check for loose retainer (A) and rubber seals (B).
The backs of some connectors are packed with
dielectric grease. Add grease if necessary. lf thegrease is contaminated, replace it.
lnsert the connector all the way and make sure it is
securelv locked.
Position wires so that the open end of the cover faces
oown.
22-4
Handling Wires and Harnesses. Secure wires and wire harnesses to lhe frame with
their respective wire ties at the designated locations.. Remove clips carefully; don't damage their locks (A).
Slip pliers (A) under the clip base and through the
hole at an angle, then squeeze the expansion tabs to
release the clip.
After installing harness clips, make sure the harness
doesn't interfere with any moving pans.
Keep wire harnesses away from exhaust pipes and
other hot parts, from sharp edges of brackets and
holes, and from exposed screws and bolts.
Seat grommets in their grooves properly {A). Do not
leave grommets distorted (B).
lt" /wl/
\--------\tfl r'---'..-
It
J
|,f . ./.ll t/
----E; F.'l/
I

Testing and Repairs. Do not use wires or harnesses with broken insulation.
Replace them or repair them by wrapping the break
with electricaltape.. After installing parts, make sure that no wires are
oinched under them.. When using electricaltest equipment, followthe
manufacturer's instructions and those described in
this manual.. lf possible, insertthe probe of thetesterfromthe wire
side (except waterproof connector).
Use back Drobe adaotor 07TM-0010204.
Refer to the instructions in the Honda Terminal Kit for
identification and reolacement of connector terminals.
(cont d)
22-5

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.

Gonnectors and Harnesses
aGonnector Index
ldentification numbers have been assigned to in-line connectors. The number is preceded by the letter "C" for connectors, "G" for groundterminals or "T" for non ground terminals.
HamessLocationEngine CompartmentDashboardOthers {Floor, Door,Trunk. and Roo{lNot€s
Starter subharnessC102 and C103T1 and T2T101 and T102
(see page 22-15)
Battery ground cableT3G'l and ( -{see page 22-l!)
Engine ground cableT4{see page 22-14)
Engine wire harnessCl0l through C104G 101(see page 22 16)
Engine compartment wire harness{rioht branchiG201 and G202(see page 22 18)
Engine compartment wire harness(left brench)G301(see page 22 18)
Engine compartment wire harness(dashboard)c401C451 and C452C501 through C503c551c851G402
(see page 22-18)
EPS subharnessC151 and C152G'151\see page 22 241
Dashboard wire harness Alleft branch)C504 through C510G501 and G503(see page 22-26)
Left side turn signal lightc506(see page 22-26)
Dashboard wire harness A(right branch)C50l through C503C5ll through C515C852 and C853G502
(see page 22-26)
Right side turn si9nal lightsub harnesslsee page 22-26)
Dashboard wire harness BC40l through C403c510G40l
(see page 22-30)
ECM wire harnessc101cl52C451 through C453c511G451
{see page 22-32}
Floorwire harness (front side)C402 and C403 G551c453C508 and C509c512C551 an.l C55?
(see page 22'34)
Floor wire harness (rear side)C553 and C554(see page 22-34)
Roo{ wire harnessc507(see paqe 22-38)Hatch wire harnessC553 and C554(s6e paqe 22'39)Driver's door wire harnessC504 and C505(see paqe 22-40)Passenqer's door wi.e harness514 and C515(see oaoe 22-41Te harness)552(see oaqe 22-42i/C wire harnessc851 rhrouoh c853(see paqe 22.43i
22-13

Connectors and Harnesses
Gonnector to Harness lndex
Battery Ground Cable
Connector or TerminalCavitiesLocationConnectstoNotesT3Left side of enqine compartmentLeft side of engine compartmentBody ground via batteryqround car)le2BattervBatterv neoative terminal
Engine Ground Cable
Connector or TerminalCavitiesfocationConnec{stoNotesr45Rioht side of enoine4Right side of engine compartmentBody ground via engine
ENGINE GROUND CABLE
BATTERY GROUND CABLE
\.....
22-14

Connector or TerminalRetCavitiesLocationConnoc,ts toNotesAlternatorKnock sensorStarter solenoidc102
c103
10857
6
4116
1
Right side of eng;ne compartmentFront of engineMiddle of engine compartmentFront of engine compartment
Front of engane compartment
Engine wire harness (seepage 22 16)Engine wire harness (seeoaae 22-16)T1r224L€tt side of engine compartmentMiddle or enoine comDanmentUnder hood fuse/relay boxStaner motorT101r1021IUnder-hood fuse/relay boxAlternatorBattervBatterv positive terminal
Starter Subharness
STARTER SUB HARNESS
22-15