2003 HONDA CIVIC Workshop Manual

Rear Window Defogger
Function Test
NOTE:. Be careful not to scratch or damage the defogger
wires with the tester probe.
. Before testing, check the No. 11 (30A) fuse in the
under-hood fuse/relay box and No. '14 ('10A) fuse in
the under-dash fuse/relay box.
1. Check for voltage between the ve rtica I dividersand
body ground with the ignition switch and defogger
switch ON.
There should be voltage as shown.
. lf there is no voltage. checkfor:- faulty defogger relay.- an open in the BLK, BLK,/YEL, or YEL/BLK wire.- taulty heater control panel.
. lf there is battery voltage, goto step 2.
6V
Check for continuity between the negative terminal(B) and body ground.
lf there is no continuity, check for:. an open in the BLK wire.. Poor body ground at the window antenna coil
mounting bolt.
Touch the voltmeter positive probe to the halfway
point of each defogger wire. and the negative
probe to the negative terminal,
There should be about 6 V with the ignition switch
and the defogger switch ON.
. lf thevoltage is asspecified, the defoggerwlre is
oK.. lf the voltage is not as specified, repair the
defogger wire.- lf it is more than 6 V, there is a break in the
negative half of the wire.- lf it is less than 6 V, there is a break in the
positive half of the wire.
2.
22-106
2.
Defogger Wire Repair
NOTE: To make an effective repair, the broken section
must be no longer than one inch.
1. Lightly rub the area around the broken section (A)
with fine steel wool, then clean it with alcohol.
Carefully mask above and below the broken portion
of the defogger wire (B) with transparent tape {C).
Mix the silver conductive paint thoroughly. Using a
small brush, apply a heavy coat of paint extending
about 1/8 inch on both sides of the break. Allow 30
minutes to dry.
Check for continuity in the repaired wire.
Apply a second coat of paint in the same way. Let it
dry 3 hours before removing the tape.
5.

Noise Gondenser Capacity Test
1.Remove the right rear side trim panel (see page 20-
66).
Disconnect the 2P connector (A) from the noise
condenser.
Noise condenser capacity:
0.47 a 0.09 microfarads
Wire side ol female terminals
4.
Use a commercially available condenser tester.
Connect the condenser tester probes, and the
measure condenser capacity.
lf it is not within the specification, replace the noise
condenser.
22-107

Moonroof
Component Location Index
MOONROOF CONTROL UNITInput Test, page 22-'l10
MOONROOF SWITCHf e$, page 22-112Replacement, page 22-1 12
Test. page22-112Replacement, page 20-41
MOONROOF LIMIT SWITCHTest, page 22-113
\|.
MOONROOF AUTO-STOP SWITCHTest, page 22'113MOONROOF OPEN RELAY
lwire colors: GRN/YEL, GRN, ILRED/YEL, BLK and YEUGRN ITest, page 22-51MOONROOF CLOSE RELAY
lwire colorsr GRN/BLK, GRN, ILGRN/WHT, BLK and YEL/GRN ITest, page 22-51
22-108

Circuit Diagram
- No.20lOAl :USNo.20150 ) :Canda
A Clos.d fom lh€ ruto nop poshio. to lh€ doed porhionB Clo!.d in th€ lilt or do3.d poilionC : Clo!.d in any op.n (io! riltl posirionD Clos.d in th€ tilt po6iiion
UNDIR OAS8 FUSE/NILAY MX
BL|(
+
G50t
8LI
I
G5{1
22-109

Moonroof
Moonroof Control Unit Input Test
Remove the headliner (see page 20-54).
Disconnect the 5P connector (A) from the control unit (B).
Wire side offemale terminals
Inspect the connector and socket terminals to be sure they are all making good contact.
. lf the terminals are bent, loose or corroded, repairthem asnecessary. and recheckthe system.. lf the terminals look OK, go to step 4.
IJ
1.
2.
bJ
GRN/WHT LT GRN
12345
RED/YEL BLK
22-110
$J

4- Reconnect the moonrool control unit 5Pconnector, and makethese inputtests attheconnector.
.lfanytestindicatesaproblem,findandcorrectthecause,thenrecheckthesystem.. lf all the input tests prove OK, go to step 5.
CaviiyWireTest conditionTest: Desired resuhPossible caus6 if result is not obtained
5BLKUnder allconditionsCheck for continuity to ground:There should be continuity.Poor ground (G501)An open in the wire
,lYEUGRNlgnition switch ON (ll)Check for voltage to ground:There should be baftery voltage.Blown No. 6 (7.54)tuse in the underdash fuse/relay boxAn open in the wire
LT GRNlgnition switch ON (ll)MoonroofclosedCheck for voltage to ground:There should be 1V or less.Poor ground (G501)Faulty moonroof auto-stop switchAn open inthewire
Moonroof openCheck for voltage to ground:There should be battery voltage.Shortto groundFaulty moonroof auto-stop switch
Disconnectthe moonroof control unit 5Pconnector, and make these;nputtests at the connector
'lfanytestindicatesaproblem,findandcorrectthecause,thenrecheckthesystem.. lf all the inputtests prove OK, the control unit must befaultv. Replace it.
CavityWireTest conditionTest: Desired rosultPossible cause if result is not obtained
3RED//ELlgnition switch ON lll)Connect a jumper wire between No,3 and No. 5 terminals.Moonroof motor should run(opened).
Poorground (G501)Blown No. 6 (7.5Aifuse in the under'dash fuse/relay boxBlown No.7120Alfuse inthe underdash fuse/relay boxFaulty moonroof open relayFaulty moonroof close relayFaulty moonrooJ motorAn open;n thewire
2cRN,4/VHTlgnition switch ON (ll)Connect a jumper wire between No.2 and No. 5 terminals.I\,4oonroof motor should run {closed).
Poor ground (G501)Blown No. 6 (7.5Aifuse in the underdash fuse/relay boxElown No. 7 (20A)fuse in the underdash fuse/relay boxFaulty moonroof open relayFaulty moonrool close relayFaulty moonroof motorAn open in the wire
22-111

Moonroof
Switch Test/Replacement
'1 . Carefully pry the moonroof switch (A) out of the
headlin er.
2. Disconnectthe 5P connector (Blfrom the moonroof
swtrcn.
3. Check for continuity between the terminals in each
switch position according to the table.
Terminal
Pi.iti.. --\145
CLOSEFO
TILT
OPEN-o
lf the continuity is not as specified. replace the
moonroof switch.
4.
22-112
Motor Test
1. Remove the headliner (see page 20-54).
2. Disconnect the 2P connector from the moonroof
motor.
3. Check the motor by connecting power and ground
accordino to the table.
Terminal
pl.iri""---\
OPEN\7o
CLOSE(,
lf the motor does not run. replace it,
NOTE: See closing force check (see page 20-48)for
motor clutch test.
\J
J

l.
2.
Limit Switch Test
Remove the headliner (see page 20-54).
Disconnect the 4P connector from the moonroof
limit switch.
Check for continuily between the terminals in each
switch position according to the table.
NOTE: Turn the motor by hand with the wrench.
Terminal
Position134
TILTo-o-
OPEN
CLOSE
lf the continuity is not as specified, replace the
moonroof limit switch.
1.
2.
Auto-stop Switch Test
Remove the headliner (see page 20-54).
Disconnect the 2P connector from the moonroof
auto-stop switch.
Check for continuity between the terminals in each
switch position according to the table.
NOTE:. Turn the motor by hand with the wrench,. The auto-stop position is about 145 mm (5.75 in.)
from fully closed.
Position
Terminal12
Botwoen AUTO-STOPand CLOSE
Between OPEN andAUTO.STOP
lf the continuity is not as specified, repair or replace
the auto-stop switch.
22-113