1999 HONDA CIVIC Door control unit

Security System
- '96-'98 USA: HX, LX, EX; '96-'98 Canada: EX, Si (cont'd)
I ooor
| #Iflinput
-----l sEcuRlrY
LT CRN/FED
LT GFN/RED
LT GBN/REO
a
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LT.FN,BED
i
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i _ _ ;T_-----l Hui.'n*f' ffi i|. :-:?-'IINTEGB]ATED I PHoro 58 ll ,
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LE:E,jJ_i*- | I i
c503
c562
vtEvl 42
BLU/BLK EAA-{ i,i-"i
See GroundDislrihJtion,pag€ 1*10.
c401
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trllnxswitchI CoNTROL! UNITI PHora 73
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2
BLU/ALK
6
BLU/ALK
12(Sedan '15)
BLU/BLK
c411PHOIO 60vtEw 60
H
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Or--<
".^ |l- G601
Light
TRUNK LATCHswrTcHClosed withvunK open.
LTGRN/FED
t___:'I______l
Tll """,
l-.'F-l DRtvER.s| 1 I DooR
Ir-Il3)lll8l,*=- ooor open.- PHOfOg6
LTGRN/REO i ; LT GFN/T,FED
*'^l ft?{,,' I iFRONTPASSENGER'S '
DOOR SWICH:Closed with :door open.PHOTO 96HH
LEFTREARDOORSWITCHClosed withdoor open.
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PHOfO 97
133-2

Security System (cont'd)
Security Control Unit Troubleshootlng
lf a faulty security system has one of the symptoms below, turn to the page listed and follow the appropriate
troubleshooting procedure. lf the symplom seems related to an input problem, or is not covered by the
troubleshooting procedures, do the Input Tests on page 133-15. Refer to the circuit schematic on pages 133
through 133-12 as needed.
Symptom lndex
Security Sysiem Does Not Work In Any Mode (HX, LX, EX)
Security System Does Not Work In Any Mode (CX, DX)
Security System Does Not Arm (CX, DX)
Security System Does Not Arm (HX, LX, EX, DX-V, SD
Security System Does Not Disarm With The Transmitler
(HX, LX, EX, DX-V, Si)
Security System Does Not Disarm (CX, DX) . . . .
Security System Does Not Disarm With The Valet Switch
c96-'98 HX, LX, EX) .
Security System Does Not Disarm With The Valet Switch ('99 models) . . .
Security System Do€s Not Work In The Valet Mode
('96.,98 HX, LX, EX) .
Security System Does Not Work InTheValetMode ('99 models) ........
Security System Alaim Does Not Trigger When The System ls Armed
And The Trunk Or A Door ls Ooened
Security System Does Not'Beep" 3 Times When The System ls Armed
With The Trunk Or A Door Open (HX, LX, EX, DX-V Si)
Parking Lights Do Not Flash (CX, DX)
Parking Lights Do Not Flash (HX, LX, EX, DX-V Si)
Security System Status LED Stays On (HX, LX, EX, DX-V Si)
Security System Status LED Does Not Com€ On (HX, LX, EX, DX-V, Si) .
Starter Cut Does Not Work Properly ('96198 HX, LX, EX, DX-V, SD . . . . . .
Starter Cut Does Not Work Properly (CX, DX) . . . . .
Hom Does Not Sound When Alarm ls Triggered
Input Tests
Page 133-17
Page 133-18
Page 133-18
Page 133-19
Page 133-20
Page 133-20
Page 133-21
Page 133-22
Page 133-21
Page 133-22
Page 133-23
Page 133-23
Page 133-24
Page 133-25
Page 133-26
Page 133-26
Page 133-27
Page 133-28
Page 133-29
Page 133- l5
133-14

Ir
Security Control Unit Input Test
The following tests are performed with the electrical conneclor disconnected from the security control unit.
\;
12345X67I910
1112131415rol171819202122
TerminalNo.WireColorTest ConditionTest: Desired ResultPossible Cause il result is not obtained
2LT GRN/REDEach door opened,one at a timeCheck for conlinuity to ground:
There should be continuity.
Faulty door switch
An open in the wirea
3BLU/BLKTrunUHatch openCheck for continuity to ground:
There should be continuity.
aFaulty trunldhatch latch switch
An open in the wirea
10WHTUnder all conditionsCheck tor voltage to ground:
There should be batteryvoltage.
. Blown No. 6 (3A) fuse in theunder-hood fuse/relay box(HX, LX, EX, DX-V Si)
. Blown No. 54 (40A) fuse in theunder-hood fuse/relay box (CX, DX)
. Blown (3A) fuse in security in-linefuse holder (CX, DX)
. An open in the wire
11YEL(BLK/YEL
cx, DX)lgnition switch ON (ll)Check for voltage to ground:
There should be batteryvoltage.
. Blown No 3 (10A) fuse in theunder-dash tuse/relay box(HX, LX, EX, DX.V, Si)
. Blown (3A) fuse in the security in-linefuse holder (CX, DX)
. An open in the wire
BLKUnder all conditionsCheck for continuity to ground:
There should be continuity.
aPoor ground (G401, G402)
An open in the wirea
t5BLU/RED
lgnition key insertedinto the ignition keyswitch
Check for voltage to ground:
There should be 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 removedfrom the ignition keyswitch
Check for voltage to ground:
There should be 4 V or more.
18GRYUnder all conditionsConnect to ground:
Horn should sound.
. Blown No.52 (15A) luse in theunder-hood luse/relay box
. Faulty horn
. Faulty horn relay
. An open in the wire
133-15

\.
\iu
Security System Does Not Work In Any
Mode (HX, LX, EX, DX-V, Si)
1. ls fuse 6 (in the under-dash box) OK?
Yes - Go to the next steo.
No - Replace the blown tuse, then go to the
next sleD.
2. Does the fuse blow again?
Yes - Go to the next step.
No - Retest the system.
3. Disconnect the security control unit connector.
4. ls there continuity from terminals 1, 10, 12, ot 22
to oround?
5.
Yes - Locate the short in the wiring between the
security control unit and the radio ('96-'98
models) or keyless door lock control unit
('99 model).
No - Go to the next step.
ls there battery voltage at terminal 10 of the
securitv control unil connector?
Yes - Go to the next steo.
No - Locate the open in the wiring between
fuse 6 and the securitv control unit.
133-17
rfe
6. ls there continuity f rom terminal 13 ot the
security control unit connector to ground?
7.
Yes - '96-'98 models: Go to the next steD.'99 models: Replace the security control
unit.
No - Locate the open in the wiring between the
security control unit and ground (G401 ).
With the security control unil connector
reconnected, is there battery voltage at terminal
21 ot the securitv control unit connector?
Yes - Go to the next step.
No- Beplace the security control unit.
ls there battery voltage at terminal 5 of the
keyless entry harness connector (B)?
Yes - Replace the radio.
No- Repair the damaged LT BLU wire
between the security control unit and
the radio.
8.

Security System (cont'd)
Security System Does Not Work ln Any
Mode (CX, DX)
1. ls luse 54 (in the under-hood fuse box) OK?
Yes - Go to the next step.
No - Repiace the blown fuse, then go to the
next step.
2. ls the fuse in the securiiy in-line fuse holder OK?
Yes - Go to the next step.
No - Replace the blown fuse, then go to next
srep.
3. Does either fuse blow again?
Yes - Locate and repair the short.
No - Retest the system.
4. ls there battery voltage at terminal 10 of the
security control unit connector?
Yes - Go to the next step.
No - Locate the open in the wiring between
fuse 54 and the security control unit.
ls there continuity from terminal 13 ol the
security control unit connector to ground?
Yes - Replace the security control unit.
No - Locate the open in the wiring between the
securitv control unit and G401.
5.
133-18
Security System Does Not Arm (CX, DX)
1. Place the ceiling light in the center position.
Does the ceiling light come on, even with all the
doors closed?
Yes - Faulty door switch or short in wiring to
door switches.
No - Go to the next steo.
2. With the ignition switch in the ON (ll) position,
does the trunk open indicator in the gauge
assembly come on, even with the trunk closed?
Yes - Faulty trunk latch switch or short in the
BLU/BLK wire.
No - Go to the next step.
3. Does voltage at terminal 2 of the security control
unit connector change from battery voltage with
all doors closed, to less than 1 volt when any
door is ooened?
Yes - Go to the next step.
No - Repair the open in the terminal 2
(LT GRN/BLK or LT GRN/RED) wire.
Does voltage at terminal 3 of the security control
unit connector change from battery voltage with
the trunk closed, to less than 1 volt when the
trunk is oDened?
v]" - R"pt"." tne security control unit.
No - Bepair the open in the terminal 3
(BLU/BLK) wire.

Security System Does Not Arm
(HX, LX, EX, DX-V, Si)
1. With all the doors closed, do the doors lock
when you press the transmitter LOCK button?
Yes - Go to the next steo.
No - Go to Doors Do Not Lock With The
Transmitter, on page 130-11 ('96-98
models) or 1 30-18 ('99 models).
Check the trunk open indicator in the gauge
assembly. With the ignition switch in the ON (ll)
position, does the trunk open indicator come on
even with the trunk closed?
Yes - Faulty trunk latch switch or shod in
BLU/BLK wire.
No - Go to the next steo.
Does the voltage at terminal 2 of the security
control unit connector change from
approximately 5 volts with all doors closed, to
less than 1 volt when any door is opened?
Yes - Go to the next step.
No - Repair the damaged terminal 2
(LT GRN/RED) wire.
Does the voltage at terminal 3 of the security
control unit connector change from battery
voltage with the trunk closed, to less than 1 volt
when the trunk is ooened?
Yes - Go to the next steo.
No - Repair the damaged terminal 3
{BLU/BLK) wire.
Does the voltage at terminal 15 of the security
control unit connector change from battery
voltage the key is not in the ignition, to less than
1 volt when the key is in the ignition?
5.
o.
Yes - Go to the-next step.
No - Repair the damaged terminal 15
(BLU/RED) wire.
ls ihere approximately 5 volts at terminal 22 of
the security control unit connector?
Yes - Go to the next step.
No - Replace the security control unit.
7. ls there approximately 5 volts at terminal 12
('96-'98 models) or 14 ('99 models) of the
keyless receiver unit ('96-98 models) or the
keyless door lock control unit ('99 models)?'96198 modelsi
Yes - Replace the radio ('96-'98 models) or the
keyless door lock control unit ('99
models).
No - Repair the damaged WHT/BLK ('96-'98
models) or BLU/YEL ('99 models) wire
between the security control unit and the
radio ('96-98 models) or the keyless door
lock control unit ('99 models).
133-19

Security System (cont'd)
Security System Does Not Disarm With
The Transmitter (HX, LX, EX, DX-V, Si)
1 . With all the doors closed and locked, do the
doors unlock when the transmitter UNLOCK
button is pressed?
Yes - Go to the next step.
No - Go to "Doors Do Not Unlock With The
Transmitte/' on page 130-11 ('96-98
models) or 130-18 ('99 models).
2. ls there approximately 5 volts at terminal 1 of the
securitv control unit connector?
Yes - Go to the next step.
No - Security control unit.
3. ls there battery voltage at terminal 13 ofthe
keyless receiver unit ('96-98 models) or the
keyless door lock control unit ('99 models)?
96.98 models:
'99 models:
Yes - Beplace the radio ('96-'98 models) or the
keyless door lock control unit ('99
models).
No - Repair the damaged YEUBLU wire
between the security control unit and
the radio.
133-20
Security System Does Not Disarm
(cx, Dx)
1. ls the tuse in the security in-line luse holder OK?
Yes - Go to the next step.
No - Replace the blown fuse, then go to the
nexl sreD.
2. Does the fuse blow again?
Yes - Locate and repair lhe short.
No- Retest the system.
3. ls there battery voltage at terminal 11 of the
security control unit connector, when the ignition
switch is in the ON (ll) position?
Yes - Replace the security control unil.
No - Locate the open in the wiring between
the ignition switch and lhe securily control
unit.

Security System Alarm Does Not Trigger
When The System ls Armed And The
Trunk Or A Door ls Opened
Security System Does Not "Be€p" 3 Times
When The System is Armed With The Trunk
Or A Door Open (HX, LX, EX, Dx-V SD
1. Place the ceiling light in the center position, then
open and close the doors one at a time. Do all
the doors operate the ceiling light properly?
Yes - Go to the next steo.
No - Repair the ceiling light circuit.
With the ignition switch in the ON (ll) position,
does the trunk open indicator in the gauge
assembly come on with the trunk open?
Yes - Go to the next step.
No - Faulty trunk latch switch or an open in the
BLU/BLK wire.
Does the voltage at terminal 2 of the security
control unit connector change trom battery
voltage with all doors closed, to less than I volt
when any door is opened?
Yes - Go to the next step.
No - Repair the open in the terminal 2
(LT GRN/RED) wire.
4. Does the voltage at terminal 3 of the security
control unit connector change from battery
voltage with the trunk closed, to less than 1 volt
when the trunk is opened?
Yes - Replace the security control unit.
No - ReDair the oDen in the terminal 3
(BLU/BLK) wire.
133-23