2000 HONDA CIVIC Ignition

Lighting System
Daytime Running Lights Control Unit Input Test (Canadal
2.
3.
LRemove the driver's dashboard lower cover and
knee bolster (see section 20).
Disconnect the connectors from the daytime run-
ning lights control unit.
Inspect the connector and socket terminals to be
sure they are all making good contact.
lf the terminals are bent, loose or corroded. repair
them as necessary, and recheck the system.
lf the terminals look OK, make the following
input tests at the connector,- lf any test indicates a problem, find and correct
the cause, then recheck the system.- lf all the input tests prove OK, the control unit
must be faulty; replace it.
CavityWireTGst conditionTest: Desired resultPossible cause it result is not obtained
BLKU nderall conditionsCheck for continuity to g.ound:
There should be continuity.
. Poor ground (G401, G402). An open in the wire
A2BLK /VHT
Underall conditionsCheck for voltage to ground:
There should be battery voltage.
Blown No.20 (10 A) fuse in the
under-dash fuse/relay box
An open in the wire
etYEUBLK
lgnition switch ON (ll)Check for voitage to ground:
There should be battery voltage.
Blown No. 18 {7.5 A) fuse in the
under-dash luse/relay box
Faulty ignition switch
An open in the wire
A4RED
Combination light
switch in " =D " posi-
UOn
Check for voltage to ground:
There should be battery voltage.
Blown No. 48 (30 A) tuse in the
under-hood fuse/relay box
Faulty combination light switch
An open in the wire
A1WHT/RED
Combination light
switch OFF; connect ajumper wire between
the YEUBLK and
WHT/RED terminals,
then turn the ignition
switch ON (ll)
Headlights (high beam) should
come on, (and high beam
indicator should come on).
. Poor ground (G201, G202, G40'1,
G402). Blown bulbs. Faulty daytime running lights
resrstor. An open in the wire
GRN/RED
lgnition switch ON (ll),
brake fluid reservoir
full, and parking brake
lever down
Connect to ground: The brake
system light should come on.
Blown No.25 (7.5 A) fuse in the
under-dash f use/relay box
Blown brake system light
An open in the wire
REDiGRNParking brake lever LrpCheck for continuity to groundl
There should be continuity.
. Faulty parking brake switch. An open in the wire
23-166

Switch Test
lMake sure you have the anti-theft code for the
radio, then write down the frequencies for the
radio's preset buttons ('99 - 00 models).
Disconnect the battery negative cable, then disconnect
the positive cable, and wait at least three minutes.
Disconnect the driver's airbag connector (see sec-
tion 24).
Remove the driver's dashboard lower cover (see
section 20).
Disconnect the cable reel sub-harness 3P connector
from the main wire harness.
2.
3.
4.
5.
1.
MAIN WIREHARNESS3P CONNECTOR
SUB-HABNESS3P CONNECTOR
REEL
6.
Terminalside olmale terminals
Check for continuity between the No. 2 terminal of
the cable reel sub-harness and body ground with
the horn switch pressed.
alf there is continuity, the horn switch is OK.
lf there is no continuity, go to step 6l-
-\
1.
8.
10.
'I 1.
9.
Remove the driver's airbag assembly (see section
24), then disconnect the horn connector from the
steering wheel.
Check for continuity between the No. 2 terminal of
the cable reel sub-harness 3P connector and horn
positive terminal.
lf there is no continuity, replace the cable reel
(see section 24).
lf there is continuity, repair or replace the horn
swtlcn,
lf all tests prove OK, reinstall the driver's airbag
assembly (see section 24), and reconnect the cable
reel sub-harness connector.
Reconnect the driver's airbag connector, and rein-
stall the access panel on the steering wheel.
Reconnect the battery positive cable, then the negative
termtnar.
After installing the airbag assembly, confirm proper
system operation:
12.
Turn the ignition switch ON (ll); the SRS indica-
tor light should come on for about six seconds
and then go off.
Make sure both horn buttons work.
13. Enter the anti-theft code for the radio, then enter the
customer's radio station presets ('99 - 00 models).
HORN CONNECTOR
23-199

Rear Window Defogger
Circuit Diagram
36 - 98 models:IGNITIONswtTcH
/ BAT \+ ots't
\:7 |
I
IIYE
WHT/BLK +WHT
wtNDow
BLKBLU
It-lt-l
TBLK
UNOEF,HOOD FUSE/RELAY BOX
N0.41 (e,oA) No a2 (aoA)
G40lG402G601 : Coupe/SedanG77t :Nalchback
23-202

Rear Window Defogger
Function Test
CAUTION: Bs careful nol to scralch or damage the defog-
ger wires with the tester probe,
'1. Check for voltage between the positive terminal and
body ground with the ignition switch and defogger
switch ON.
There should be banery voltage.
. lf there is no voltage, check for:- faulty defogger relay.- faulty defogger switch.
an ooen in the BLK,/BLU wire.
. lf there is battery voltage, go to step 2.
POSITIVE TERMINAL
2. Check for continuity between the negative terminal
and body ground.
lf there is no continuity, check for an open in the
defogger ground wire.
Touch the voltmeter positive probe to the halfway
point of each defogger wire, and the negative probe
to the negative terminal.
There should be approximately 6 V with the ignition
switch and the defogger switch ON.
. lf the voltage is as specified. the defogger wire is
oK.
. lf thevoltage is not as specified, repairthe defog-
ger wrre.- lf it is more than 6 V, there is
negative half of the wire.- lf it is less than 6 V, there is
positive half of the wire.
a break in the
a break in the
23-204
OPEN
?
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 with
fine steel wool, then clean it with alcohol.
2. Carefully mask above and below the broken portion
of the defogger wire with cellophane tape.
CELLOPHANETAPE
Using a small brush, apply a heavy coat of silver
conductive paint extending about 1/8" on both
sides of the break. Allow 30 minutes to dry.
NOTE: Thoroughly mix the paint before use.
Check for continuity in the repaired wire.
Apply a second coat of paint in the same way. Let it
dry three hours before removing the tape.

Switch Input Test
CAUTION: Be careful not to damagc the rear window
defogger switch or the center panel when prying the
switch out.
NOTE: Before testing, check for blown No. 16 (7.5 A)
fuse in the under-dash fuse/relay box,
1. Pry the switch out of the center panel (see section 20).
2. Disconnect the 5P connector from the switch.
3. Turn the jgnition switch ON (ll), and check the voltage
between the BLVBLU {+) and the BLK (-)terminals.
There should be battery voltage
. lf there is no voltage, check for an open in the
BLVBLU wire.
. lfthere is baftery voltage, go to step 4.
Wire side of famale terminals
connect a jumper wire between the BLK/BLU and
the BLU/YEL terminals.
Turn the ignition switch ON (ll), and check that the
rear window defogger works; if it does. replace the
defogger switch.
4.
RED
l-
23-205

Function Test
CAUTION: Be careful not to damage the mirror switch
or the dashboard drivel's lower covel when prying the
swhch out.
Withoui defogger:
1. Pry the switch out of the driver's dashboard lower
cover.
2. Disconnect the 10P connector from the switch.
lOP CONNECTOR
BLU/WHT
YEL/RED
BLK/YELBLK
4
568
YEL/BLK
POWER MIRRORswtTcH
\:/"*jgil*-(
Wire side of female termanals
Mirror Test
Both inoperative:
1. check for voltage between the No. 2 (BLVYEL) ter
minal and body ground with the ignition switch ON
0 r).
There should be batterY voltage
. If there is no voltage, check for:
- blown No. 17 (7 5 A) fuse in the under-dash
tuse/relay box- an open in the BLK'/YEL wire.
o lf there is battery voltage, go to step 2.
2. Check for continuity between the No 4 (BLK) termi-
nal and body ground.
There should be continuity.
. lf there is no continuity, check for:
- an open in the BLK wire.
- poor ground (G551).
Left mirror inoporalive:
connect the No. 2 {BLK/YEL) terminal of the 10P connec-
tor to the No. 3 (YEURED) terminal and the No 5 (or No
6) terminal to body ground with jumper wires The left
mirror should tilt down (or swing left) when the ignition
switch is turned ON (ll)
. lf the mirror does not tilt down (or does not swing left),
remove the left door panel. and check for an open in
the BLU/WHT (or BLU/BLK) wire between the left
power mirror and the switch
- lf the wire is OK. check the left power mirror actua-
tor.
lf the mirror neither tilts down nor swings left. repair
the YEURED wire.
lf the mirror operates properly, check the mirror switch'
Right mirror inoperative:
Connect the No. 2 (BLK /EL) terminal of the 10P connector
to the No. 3 (YEURED) terminal and the No. 9 (or No 8)
terminal to body ground with jumper wires The right mir-
ror should tilt down (or swing left) when the ignition
switch is turned ON (ll).
. lf the mirror does not tilt down (or does not swlng
left), remove the right door panel. and check for an
open in the GRN/WHT (or YEUBLK) wire between the
right power mirror and the switch.
- lf the wire is OK, check the right power marror actu-
ator.
. lf the mirror neither tilts down nor swings left. repair
the YEURED wire
. lf the mirror operates properly, check the mirror
switch.
(cont'd)
23-209

Power Mirrors
Funstion Test (cont'dl
With dcfoggcr:
1. Pry the switch out ot the driver's dashboard lowercover.
2. Disconnect the 10P coonector from the oower mir-ror switch.
Mirror Test
Bolh inoparrtiv.:
1. Check for voltage between the No. 1 terminal andbody ground with the ignition switch ON flt).There should be battery voltage.. lf there is no battery voltage, check to.:- blown No. 16 (7.5 A) fuse in the under-dash
tuse/relay box.- an open in the BLVBLU wrre.
! lf thero is banery voltage, go to step 2.
2. Check for continuity b€tween the No. 2 terminal andbody ground.
There should be continuitv.. ll there is no continuity, check tor:- an open in the BLK wire.- poor ground (G5511.
. lJthere is continuity. check both mirrors individu-ally 8s described in the next column,
23-210
Laft mirror inopcrativ!:
Connect the No. 1 terminal to the No. 7 terminal. and theNo. 4 (or Nb.9) terminalto body ground with jumper
wires. The left mirror should tilt down (or swing left)with the ignition switch ON (ll).
. lf the mirror does not tilt down (o. does not swinglett), check for an open in the YEURED (or BLUMHT)wire between the left mirror and the 10p connector. lfthe wire is OK, check the left mirror actuator.a lf the mirror neither tilts down nor swings left, repairthe BLU/BLK wire.
t lf the mirror works properly, check the mirror switch.
Right mi.ror inopcrativc:
Connect the No. 1 terminal to the No. 8 terminal, and theNo.4 (or No. 10) terminalto body ground with l'umperwi.es. The right mirror should tilt down (or swing lett)with the ignition switch ON (ll).
. lf the mirror does not tilt down {or does not swingleft), check for an open in the YEURED {or YEUBLK)
wire between the right mirror and the l0P connector.lf the wire is OK, check the right mirror actuator,. lf the mirror neither tilts down nor swings left, repairthe GRN/WHT wire.o lf the mirror works properly. check the mirro. switch,
Dafoggcr inoperEtivo:
1. Check for voltage between the No. 3 terminal andbody ground with the ignition switch ON (||).
There should be battery voltage.a lf there is no battery voltage, check for;- blown No. 16 (7.5 A) luse in the under-dash
fuse/rel8y box,- An open in the BLK,iBLU wire.. It there is battery voltage, go to step 2.
2. Connsct the No. 3 tsrminal to the No. 6 terminalwith a iumpsr wire. Both mirrors should gradually
warm up when the ignition switch ON flt).a lf neither mirror warms up, check for an open inthe ORN/WHT wire.. It only on€ lails to warm up, check its mirrordsfogger elem6nt.. lf both mirrors warm up, check ths switch.

CavityWireTest conditionTest: Desired resultPossible caus€ if result is not obtainsd
BLK
U nderall conditionsCheck for continuity to ground:
There should be continuity.
. Poor ground (G551)
. An open in the wire
A8
A']BLU/BLKlgnitlon switch ON (ll)Check for voltage to ground:
There should be batterY voltage.
Blown No. 10 or '11 (20 A) fuse in
the under-dash fuse/relay box
Faulty power window relay
An open in the wireA6GRN/BLK
R ED/B LU
Connect the BLU/BLK
terminal to the RED/YEL
terminal, and the RED/
BLU terminal to the
BLK terminal, then turn
the ignition swilch ON
(

).
Check the driver's window motor:
It should run (the window moves
oown,.
Check the passenger's window
motor: lt should run (the window
moves qown,.
Check for voltage between the
BLU and BLK terminals: APProx. 6
V should be indicated as the driv-
er's window motor runs.
Faulty driver's window motor
An open in the wire
Faulty passenger's window motor
Faulty passenger's window switch
An open in the ware
Faulty pulser
FaLilty driver's window motor
An open in the wire
A3RE D/YE L
A7BLUI/E L
connect the GRN/BLK
terminal to the BLUryEL
terminal, and the BLU/
ORN terminal to the
BLK terminal, then turn
the ignition switch ON
1

i.
A2BLU/ORN
412BLU
Connect the BLU/BLK
terminal to the REDI/EL
terminal, and the BLK
terminal to the RED/
BLU terminal, then
turn the ignition switch
oN (|| ).
A8BLK
23-229