2003 HONDA CIVIC ERS

Heating and Air Conditioning
A/C System Tests (cont'd)
1.
Performance Test
Air conditioning refrigerant or lubricant vapor
can irritate your eyes, nose, or throar.
Be carefulwhen connecting service equipment.
Do not breathe refrigerant or vapor.
The performance test will help determine if the air
conditioner system is operating within specifications.
Use only service equipment that is U.L.-listed and is
cenified to meet the requirements of SAE J2210 toremove HFC-134a (R-134alfrom the air conditioning
system.
lf accidental system discharge occurs, ventilate the
work area before resuming service
R-134a service equipment or vehicle air conditioning
systems should not be pressure tested or leak testedwith compressed air.
Additional health and safety information may be
obtained from the refrigerant and lubricant
manufacturers.
Connect a R-134a refrigerant recover/recycling/
charging station to the high-pressure service port
and the low-pressure service port, following the
equipment manufacturer's instructions.
Determine the relative humidity and air
Iemperaru re.
' Compressed air mixed with R-134a forms a
combustible vapor.. The vapor can burn or explode causing serious
Injury.. Never use compressed air to pressure test
R-134a service equipment or vehicle air
conditioning systems.
21-58
4.
Open the glove box. Remove both glove box stops,
then let the glove box hang down (see page 20-63).
Insert a thermometer (A) in the center vent, andplace another thermometer {B) near the blower unit.
Test conditions:
. Avoid direct sunlight.. Open the hood.. Open the front doors.. Sel the temperature control dial on Max Cool, the
mode control dial on Vent, and the recirculation
control switch on Recirculate.. Turn the A,/C switch on and the fan switch on Max.. Run the engine at 750 rpm.. No driver or passengers in vehicle.
After running the air conditioning for I0 minutes
under the above test conditjons, read the delivery
temperature from the thermometer in the center
vent, the intake temperature near the blower unit,
and the high and low system pressure from the Ay'Cga uges.

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

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

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
Connector to Harness lndex (cont'd)
Floor Wire Harness (Front sidel
Connec-tor or TerminalI Refuavftres Location connects to Nol6sDriver's seat belt switchDriver's side airbag inflatorDriver's side impact sensorLeft side seat belt buckle tensionerMemory erase signal (MES) connectorParking brake switchPassenger's seat belt switchPassenger's side airbag inflatorPassenger's side impact sensorRight side seat belt buckle tensionerSRS unit connector BSRS unit connector CUnder-dash fuse/relay boxconnector P {see page 22-45)Under-dash fuse/relay boxconnector O (see page 22,45)c402
c403
c453
c508
c509
c512
11l013121995374202111
'r8
22
23
2
14
1
6
3 I Under driver's seat2 i Under driver's seat2 I Left side offloor4 Under driver's seat2 Under dash fuse/relay box1 1 Middle offloor3 Under passenger's seat2 Under passenger's seat2 Right side offloor4 Under passenger's seat18 I Under middle of dash8 Under middle of dash18 Underdash fuse/relay box
8
]
Under dash fuse/relay box
10
I
Under middle of dash
4 Under middle of dash
6 Under middle of dash
4 Under middle of dash
6 Under middle ofdash
8
I
Under middle of dash
10 Under middle of dash
4 ] Unaer middle of aasn
Dashboard wire harness B{see page 22 30)Dashboard wire harness B(see page 22-30)ECM wire harness (see page22-321Dashboard wire harness A(see page 22-26)Dashboard wire harness A\see page 22-26)Dashboard wire harness A{see page 22-26)Engine compartment wireharness (see page 22 18)OPDS unit harness (see page22-421G551IL,nder passenger's seatBody ground via floor wire
22-34

Under-dash Fuse/Relay Box
Removal and Installation
SRS components are located in this area. Review the
SRS component locations {see page 23-13) andprecautions and procedures (see page 23-14) in the SRS
section before performing repairs or service.
Removal
1. Make sure you have the anti-theft code for the radio,
then write down the frequencies for the radio's
preset buttons.
2. Disconnectthe battery negative cable, then
disconnect the positive cable, and wait at least
three minutes.
3. Remove the driver's dashboard lower cover (see
page 20-59).
4. Disconnect the connectors from the fuse side of the
under-dash fuse/relay box.
5. Remove the mounting bolt, and slide the under-
dash fuse/relay box (A) down from the bracket {B).
6. Disconnect the back side from connectors from the
back of the under-dash fuse/relay box, and remove
the fuse/relay box.
NOTE:The SRS connector is a spring-loaded lock
type (see page 23-1 1).
lnstallation
1. Installthe under-dash fuse/relay box in the reverse
order of removal and connect all connectors to the
under-dash fuse/relay box.
2. Installthe driver's dashboard lower cover.
3. Connect both the negative cable and positive cable
to the battery.
4. Enter the anti-theft code for the radio, then enter
the customer's radio station presets.
5. Confirm that all systems work properly,
6. Do the engine control module (ECM) idle learn
procedure (see page 11-139).
22-49