Door lock control unit HONDA CIVIC 1996 6.G Owner's Guide

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

rl,
;
Keyless Entry Does Not Work ln Any
Mode
NOTE: Before beginning, verify that all the
transmitters are programmed to the vehicle.
1. ls the vehicle equipped with the optional security
system?
Yes - Go to the next steD.
No - Go to step 3.
2. Does lhe keyless entry work correctly when the
security control unit connector is disconnected?
Yes - Faulty security system, go to security
system for f urther lroubleshooting.
No - Go to the next steo.
3. Does the transmitter LED come on when anv of
the buttons are pressed?
Yes - Go to step 6.
No - Go to the next step.
4. ls the transmitter battery installed with the
positive side facing up?
Yes - Ensure that the battery contact tabs are
repositioned, then replace the battery.
Remove the key trom the ignition, then
close the doors and trunk. Press the
LOCK button on the transmitter six times,
then go to the next step.
No - Ensure that the battery contact tabs are
repositioned, then reinstall the battery
correctly. Then reprogram the transmitter
and retest it. Use the procedure on page
1 30-1 4 for transmitter programming.

130-17
7.
Does the transmitter LED come on when anv of
the buttons are oressed?
Yes - Go to the next steo.
No - Replace the transmitter and program it by
using the procedure on page 130-14.
Does the system work properly in all modes?
Yes - Finished. The system is OK.
No - Go to the next step.
Recheck with a known good transmitter
reprogrammed to the vehicle. Does the system
work properly in all modes?
Yes - Replace the transmitter and program it by
using the procedure on page 130-14.
No - Replace the keyless door lock control unit.

Power Door Locks (cont'd)
Ceiling Light Does Not Come On When
The Doors Are Unlocked With The
Transmitter
1 . ls the ceiling light switch in the center position?
Yes - Go to the next steD.
No - Reposition the ceiling light switch and
relesI.
2. Does the ceiling light come on with the ceiling
light switch in the ON position?
Yes - Go to the next steo.
No - Repau the ceiling light circuit.
3. Does the transmitter LED come on when anv of
the buttons are oressed?
Yes - Go to the next step.
No - Check the transmitter battery, then retest.
lf the ceiling light still does not work, go to
the next step.
4. Recheck with a known good transmitter
reprogrammed to the vehicle. Does the system
work properly in all modes?
Yes - Replace the transmitter and program it by
using the procedure on page 130-14.
No - Go to the next step.
5. With the keyless door lock control unit connector
disconnected, run a jumper wire from terminal 1
to ground.
Does the ceiling light come on?
Yes - Replace the keyless door lock control
un [.
No - Repair the open in the terminal I
(LT GRN/BLK) wire.
130-18
Doors Do Not Unlock Or Lock With
The Transmitter
1 . Do the door's unlock and lock when using the
drivefs door lock switch?
Yes - Go to the next steo.
No - Repair the power door lock system.
2. Does the transmitter LED come on when anv of
the buttons are oressed?
Yes - Go to the next steo.
No - Check the transmitter batlery, then retest.
lf the doors still do not unlock or lock with
the transmitter, go to the next step.
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 30-1 4 for transmitter programming.
No - Go to the next steo.
4. Does the voltage at terminal 3 of the keyless
door lock control unit connector change from
battery voltage when the key is not in the
ignition, to less than 1 volt when the key is in
the ignition?
Yes - Go to the next step.
No - Replace the ignition switch or repair the
damaged terminal 3 (BLU/RED) wire.
5. Does the voltage at terminal 12 of the keyless
door lock control unit connector change from
battery voltage when all the doors are closed, to
less than I volt when any door is opened?
Replace the keyless door lock control unit.
Reoair the ooen in the terminal 12
(LT GRN/RED) wire.

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.

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---- Canada ---'------l
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k;i
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: \varst :l;#"b" I; ; $vitch Securiiv Bus Remote Bus Bus i I vttwte ll C422, f inqrt outDut d€,.az LED control data 0 data l , : I P1oTo 58-a- --' s Y---^a---.;f --.;Y---^;Y---:Y - - - - r ;-.tr'---
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--1-"' ---' I coNrRoL' 'i uNlri vatst, I VarEr tl PHQ|AT3: ; s,vitch Securiiy Bus Remote Bus Bus t)vtEwte, f inarr ornout d'de2 LED control data 0 data l :
7-1 e4re4lon
lfil Iffi;*l
[I$'':r*il
: 84 |, 85A 87A 811 |' Bt2 |' 813 |' vtEw68 | ! sae r.teadli
i i'=::t:::ti------r------s------r, -"** i : ! 8yJfu;; I I Vabt S€curity 8us Remot€ Bus Bus I Reieiver ! ; --_ _.._ ll
:i iffi$ input data2 ffiDul
datao datal iunrr !:""'"^l
(cont'd)
133-1

\.
\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 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.

-
Component Connector View Index (Views begin on page 202-21
Connector View
ABS Control Unit........ ......63
Audio Unit ('99-'00 models) ......74
Combination Light Switch . . . . . . . . . . . . . . . 64
Combination Wiper Switch . . . . . . . . . . . . . . 65
Cruise Control Unit.... .....43
C\TTTransmission Solenoid ............. 25
Data Link Connector (DLC) ..... 48
Daytime Runnlng Lights Control Unit ..... 66
Engine control Module (ECM) ...........70
Exhaust Gas Recirculation (EGR) Valve
and Lift Sensor (D16Y5 Mfl, D1685) . . . . 10
Gauge Assembly .............71
HazardWarnlngSwitch,,. .,,,...,,,,... 32
Heater Control Panel ('96-'98 models) .....44
Heater Control Panel ('99-'00 models) ...., 76
Heater Fan Switch ('96-'98 models) ,,,.... 11
fniector Control Module (GX) ............77
I/
202-1
Connector View
Integrated Control Unit .......,. 67
f nterfock Control Unit .... ...... 26
Keyfess Door Lock Control Unit . . . . , . . . . . 75
Mode Control Motor ... ........'17
Moonroof Close Relay .. .......13
Moonroof Open Relay ... .......15
PGM-FI Main Relay .. .......... 18
Power Door Lock Conlrol Unil ..... ...... 37
Power Mirror Switch .,... ...... 33
Power Window Master Switch .,.........36
Powertrain Control Module (PCM) .......70
Security Control Unit ..., ..,,... 58
Security Starter Cut Belay ... ...,,,....,, 12
SRS Unit ............. 51
Stereo Radio Tuner ('96-'98 models) ...... 68
Transmission Control Module CICM) .....69