1999 HONDA CIVIC horn

Horn
- '99-'00 Models
FUSE 52HORI,SfOP LTt5a
UNDER.HOODFUSE/RELAYBOX
HORNRELAY
2
BIU/FED
Ior
GRY
.,1 ,
J---a-----r---O
i ;l i ;,1...,' r--1 : SECUR|TY:ll:sYsrEM,ia,coNNEcroR' ! ! (oPrloN), L--J , i!,o!o 73, KEYLESS I vlEw 58
: DooR LocK withi coNTRoL Kevless, UNIT EntryI PHOIO 134I vtEw 75
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i"l ii ri-'--.| coMBtNATtoN
: lrft ! !',f,11" I' | | puotozz :', l--J vttw u ;
i--- Er""pt ex.ooer ----j
c214
v|EW21
c430PHOTO 65
Vehicles pre-wired foraccessory security system
STEERINGWHEEL
CABLEREEL
.l
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ISee CruiseControl
GRY
ELU
I
a\
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GRY
HORN
---------^1
niffil"a!m"
40-2

Keyless Receiver Unit Troubleshooting
lf a faulty keyless receiver unit has one of the symptoms below, turn to the page listed and follow the
appropriate troubleshooting procedure. lf the symptom seems related to an input problem, or is not covered
by the troubleshooting procedures, do the Input Tests on page 130-6. Refer to the circuit schematic on pages
1 30-2 and 130-3 as needed.
Symptom Index
Keyless Entry Does Not Work In Any Mode
Ceiling Light Does Not Come On When The Doors Are Unlocked
WithTheTransmitter ....
Doors Do Not Unlock Or Lock With The Transmitter . . . .
Horn Does Not Sound With The Transmitter "Beeo" Feature On
Horn Does Not Stop Sounding .......
Input Tests
Page 130-8
Page 130-9
Page 130-1 0
Page 130-11
Page 130-11
Page 130-11
Page 130-6
.1,

Power Door Locks (cont'd)
Keyless Receiver Unit Input Test
The following tests are pertormed with A (Main) and B (Keyless) disconnected from the audio unit.
TerminalNo.WireColorTest ConditlonTest: Desired RasultPossible Cause it resull is not obtained
4WHT/BLUUnder all conditionsCheck for vollage to ground:
There should bs batteryvoltage.
aBlown No. 47 (7.5A) tuse in the
under-hood fuss/relay box
An open in the wireo
5YEUREDlgnition switch ACC (l)Check lor voltage to ground:
Th€re should be battery
voltage.
aBlown No. 28 (10A) fuse in the
underdash fusg/relay box
An open in the wirea
TerminalNo.WireColorTest CondiiionTest: Desired ResultPossible Cause if rssult i3 not obtalned
BLU/RED
lgnition key insertedinto the ignition key
switch
Check for voltage to ground:
There should bs 1 V or less.aPoor ground (G401, G402)
Faulty ignition key switch
An open in the wire
Short in the wire
a
a
algnition key r€moved
trom the ignition key
switch
Check lor voltage to ground:
There should be 4 V or more.
3BLUI/ELUnder all conditions
Check for continuity betweenthe audio unit 16P connectorNo- 3 terminal and power doorlock control unit 12P connsctorNo. 6 terminal: There should
be continuity.
I An open in the wire
6BLK/YELlgnition switch ON (ll)Check for voltage to ground:
Thers should be batteryvollage.
. Blown No. 14 (7.5A) fuse in the
under-dash fuse/relay box
. An open in the wire
8LT GRN/BLKCeiljng light switch in"middle position"Connect to ground: The ceilinglight should come on.
aBlown No. 43 (7.5A) fuse in the
undsr-hood fuse/relay box
Blown ceiling light bulb
Faulty ceiling light
An open in the wire
a
a
o
14LT GRN/REDEach door oponed,one at a timeCheck for continuity to ground:
There should be continuity.
aFaulty door switch
An open in lhe wirea
tcBLKUnder all conditionsCheck for continuity to ground:
There should b€ continuity.
aPoor ground (G401, G402)
An open in the wirea
16GRYUnder all conditionsConn€ct to ground:
Horn should sound.
. Blown No.52 (15A) fuse in the
under-hood tuse/relay box
. Faulty horn
. Faulty horn relay
. An open in the wire
130-6

a
Horn Does Not Sound In The Panic
Mode Or With The Transmitter "Beep"
Feature On
NOTE: The transmitter has a Beep On/Off feature.
Refer to page 130-4 for how to tum the beep on or
off.
1. Does the horn sound when the HORN button is
oressed?
Yes - Go to the next steD.
No - Repair the horn circuit.
2. Does the transmittor LED come on when any of
the buttons are pressed?
Yes - Go to the next step.
No - Check the transmitter battery then retest.
ll the beep feature still does not work, go
to the next steo.
3. Recheck with a known good transmitter
reprogrammed to the vehicle. Does the system
work properly in all modes?
Yes - Replace and program the transmitter,
then retest. Use the procedure on page
1 30-4 f or transmitter programming.
No - Go to the next step.
4. With the keyless entry harness connector (B)
disconnected from the radio, run a.iumper wire
f rom terminal 16 to ground.
Does the horn sound?
Yes - Reglace the radio.
No - Repair the open in the terminal 16 (GRY)
wire.
\
Horn Does Not Stop Sounding
1. ls the vehicle equipped with the optional security
system?
Yes - Go to the next step.
No - Go to step 3.
Do€s the horn stop sounding when the security
control unit connector is disconnected?
Yes - Replace the security control unit.
No- Go to the next step.
Does the horn stop sounding when the keyless
entry harness connector (B) is disconnected?
Yes - Reolace the radio.
No - Reoair the hom circuit.
130-11

Power Door Locks
- '99-'00 Models with Keyless Entry
@
i-f?G;.-----l
i ?f*""t:::", i
L-,H-i{*q-J
UNDER-DASHFUSE/RELAYBOX
8 Y C419
vtEW49
SeeHOrns
15
Horncontrol
Grgund
lgnltioninputDooropeninput
K€yswitchInpul
Lighlstlashcontrol
17
ALK
c447
vtEw 5a
'12
LT GFN/RED
See GroundDistribution,page I +6,
YI
IF--.--.r-G401
I
3
ALU/f,EO
!r.lFN' z sEcuglw t5REOSYSTEMtsb'*nii'cro* =2
a, o"nt"ao 1lvlEw 58
(Not
(oPTroN) c447See HeadlightSwitch
C415 STEERINGPHora 6a LOCKVlEtt\/ 14 PHO|O 71
lgntlion KaySYrftchClosed with keyin ignition.
LT GRN/FED
LT GFN/REDSee lgnitionKey Reminder
UNDER-DASHFUSE/RELAYBOX
ALU/IVITT
a9
GFN
'14
GRN
130-12

Keyless Receiver Unit Troubleshooting
lf a faulty keyless door lock control unit has one of the symptoms below, turn to the page listed and tollow the
appropriate troubleshooting procedure. lf the symptom seems relatod to an input problem, or is not covered
by the troubleshooting procedures, do the Input Tests on page 130-16. Refer to the circuit schematic on
pages 130-12 and 130-13 as needed.
Symptom Index
Keyless Entry Does Not Work In Any Mode
Ceiling Light Does Not Come On When The Doors Are Unlocked
With TheTransmitter ....
Doors Do Not Unlock Or Lock With The Transmitter . .
Horn Does Not Sound With The Transmitter 'Beep" Feature On .........
Horn Does Not Sound In The Panic Mode ..
HornDoes NotStopSounding ...............
Page 1 30-17
Page 130- 18
Page 130-1 I
Page 130-19
Page 130-19
Page 1 30-19
Page 130-16Input Tests
\.
130-15

Power Door Locks (cont'd)
Keyless Door Lock Control Unit Input Test
The following tests are performed with the keyless door lock control unit connector disconnected.
TerminalNo.WireColorTest ConditionTest: Desir€d ResultPossible Cause if result ls not obtain€d
1LT GRN/BLKCeiling light switch in"middle position"Connect to ground: The ceilinglight should come on.
aBlown No. 43 (7.5A) luse in theunder-hood tuse/relay box
Blown ceiling light bulb
Faulty ceiling light
An open in the wire
o
a
a
3BLU/RED
lgnition key insertedinto the ignition keyswitch
Ch€ck lor voltage to ground:There should be I V or less.aPoor ground (G401, G402)
Faulty ignition key switch
An open in the wire
Short in the wire
a
a
o
lgnition key removedlrom the ignition keyswitch
Check for voltage to ground:There should be 4 V or more.
BLfiEtlgnition switch ON (ll)Check lor voltage to ground:
There should be batteryvoltage.
. Blown No. 14 (7.54) fuse in theunder-dash fuse/relay box
. An open in the wire
bREO/BLKHeadlight switch inPARK OT HEAD
Check for voltage to ground:
There should be batteryvoltage.
aBlown No. 32 (7.5A) luse in theunder-dash fuse/relay box
A faulty headlight switch
An open in the wire
a
o
LT GRN/RED
Each door opened,one at a timeCheck lor continuity to ground:
There should be continuitv.
oFaulty door switch
An open in the wireo
15GRYUnder all conditionsConnect to ground:
Horn should sound.
. Blown No. 52 (154) fuse in theunder-hood fuse/relay box
. Faulty horn
. Faulty horn relay
o An open in the wire
BLKUnder all conditionsCheck lor continuity to ground:
There should be continuity.
aPoor ground (G401 , G402)
An open in the wirea
130-16

Horn Does Not Sound In The Panic
Mode Or With The Transmitter "Beep"
Feature On
NOTE: The transmitter has a Beep On/Ott toature.
Refer to page 130-14 for how lo turn the be€p on or
off.
1. Does the horn sound whon the HORN button is
oressed?
Yes - Go to the next step.
No - Repair the horn circuit.
2. Does the transmitter LED come on when any of
the buttons are Dressed?
Yes - Go to the next steP.
No - Check the transmitter battery, then retest.
lf the beep feature still does not work, go
to the next steo.
3. Recheck with a known good transmitter
reprogrammed to the vehicle. Does the system
work properly in all modes?
Yes - Replace and program the transmitter,
then retest. Use the procadure on pag€
1 30-1 4 for transmitter programming.
No - Go to the neLt siep.
4. With the keyless door lock control unit connector
disconnected, run a iumper wire from terminal
15 to ground.
Does the horn sound?
Yes - Replace the keyless door lock control unit.
No - Repair the open in th€ terminal 15 (GRY)
wire.
\lr
130.19
Horn Does Not Stop Sounding
1. ls the vehicle equipped with the optional security
system?
Yes - Go to the next step.
No - Go to steD 3.
Does the horn stop sounding when the security
control unit connoctor is disconnected?
Yes - Replace the sEcurity control unit.
No - Go to the nsxt step.
Does the horn stop sounding when the keyless
door lock control unit connector is disconnected?
Yes - Replace the keyless door lock control unit.
No - ReDair the horn circuit.