1999 HONDA CIVIC ect

Power Door Locks
Troubleshooting
NOTE: The numbers in the table show the troubleshooting sequence.
*: With keyless entry system
NOTE:
. When the remote transmitter button is pressed the first time, only the driver's door will unlock. When the button is
pressed the second time, all the doors will unlock.
. Thedoorswill relock a utomatica lly after 30 seconds if a door is not opened, or the key is out ot the ign ition switch.
. The keyless entry system will not lock or unlock the doors when the key is in the ignition switch.
Item to be inspected
Symptom
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Power door lock svstem does not work at all.1ucc IWHT/GRN
Doors don't lock with driver's
door lock knob switch.
All doorsI2BLU,ryVHT
One or more
doors
YEURED or
WHT/RED
Doors don't lock or unlock
with driver's door lock switch.
All doors
1
GRN/WHT,
GRN/ORN,
YEURED or
WHT/RED
One or more
ooors
YEURED or
WHT/RED
*The power door lock system works properly but
the keyless entry system doesn't.1G401
G402
GRNAVHT or
GRNiORN
23-256

Control Unit Input Test ('96 - 98 models and'99 - 00 models without
Keyless Entry System)
1. Remove the driver's door panel (see section 20).
2. Disconnect the 12P connector from the control unit.
3. Inspect the connector and socket terminals to be sure they are all making good contact
a lf the terminals are bent, loose or corroded, repair them as necessary, and recheck the svste-
. 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 syslem
lf all the input tests prove OK, the control unit must be faulty; replace it.
.I2P CONN€CTOR
Wire side o{ femele terminals
*: With keyless entry system
l-llcont d)
23-257
YEL/RED
BLU/RED
15
1812
BLU/WHT

Power Door Locks
Control Unit lnput Test ('96 - 98 models and'99 - 00 models without
Keyless Entry Systeml (cont'dl
Disconnect the 12P connector from the power door lock control unit.
CAUTION: To prevsnt damage to the actuator, apply battery voltage only momentarily.
Cavity WireTest conditionTest: Desired resultPossible cause if result is nol obtained
*: With keyless entry system
Reconnect the 12P connector to the power door lock control unit.
Cavity WireTest conditionTssl: Desirsd losullPossible cause it resull b not obtained
4BLKUnder all conditionsCheck for continuity to ground:
There should be continuity.
. Poor ground (G55'l ). An open in the wire
WHT/GRN
Under all conditionsCheck for voltage to ground:
There should be battery voltage.
. Blown No. 51 (20 A)fuse in the
under-hood fuse/relay box. An open in the wire
2YEURED
Connect the YEURED
terminal to the WHT/
GRN terminal, and the
WHT/RED terminal to
the BLK terminal
momenraflty.
Check door lock operation:
All passenger's doors should
untocK.
Blown No. 51 {20 A) fuse in the
under-hood fuse/relay box
Faulty actuator
An open in the wire
3BLU/RED
Connect the BLU/RED
terminal to the WHT/
GRN terminal. and the
WHT/RED terminal to
the BLK terminal
momenraflry.
Check door lock operation:
Driver's door should unlock.
5WHT/RED
connect the WHT/RED
terminal to the WHT/
GRN terminal, and the
YEL/RED terminal to
the BLK terminal
momenrafl ty.
Check door lock operation:
All passenger doors should lock.
BLU/YEL
Under all conditions.Check for continuity between the
power door lock control unit l2P
connector No. 6 terminal and
audio unit 16P connector No. 3 ter-
minal: The.e should be continuity.
An open in the wire
GRN,ryVHTDriver's door lock
switch in LOCK
Check for voltage to ground:
There should be 1 V or less.
Faulty driver's door lock switch
Poor ground {G551)
An open in the wire
8GRN/ORNDriver's door lock
switch in UNLOCK
7BLUA/VHT
Driver's door lock knob
in LOCK
Check for voltage to ground:
There should be 1 V or less.
Faulty driver's door lock actuator
Poor ground {G551)
An open in the wire

)Control Unit Input Test ('99 - 00 models with Keyless Entry System)
1.Remove the driver's kick panel.
Disconnect the 18P connector from the control unit.
Inspect the connector and socket terminals to be sure they are all making good contacl.
. lf the terminals are bent, loose or corroded, repair them as necessary, and recheck the system
. lf the terminals look OK, make rhe following input tests at the connector.
- lf anv test indicates a problem, find and correct the cause, then recheck ihe system
- lf all the input tests prove OK, the control unit must be faulty; replace it
Wire side oI female terminals
Disconnect the 18P connector from the power door lock control unit.
CAUTION: To provent damage to the actuator, apply battery Yoltage only momentarily.
Cavity Wir€ Test conditionTest: Desired resultPossible cause if result is not obtained
BLK/YELRED/SLK
25618
910/,'2 ,/
'151718
LTWHT
17BLKUnder all conditionsCheck for contlnuity to ground:
There should be continuity.
. Poor ground (G551)
. An open in the wire
t8WHT/GRN
Under all conditionsCheck tor voltage to ground:
There should be battery voltage.
. Blown No. 5'1 (20 A) luse in the
under-hood tuse/relay box
. An open in the wire
4B LK/YEL
lgnition switch ON (ll)check for voltage to ground:
There should be battery voltage.
Blown No. l4 (7.5 A) fuse in the
under-dash fuse/relay box
An open in the wire
(cont'd)
23-259
l-r

Power Door Locks
Control Unit Input Test ('99 - 00 models with Keyless Entry System) (cont'd)
BLU/RED WHT/RED
8LU/WHT8LK/YELRED/BLK
2345618
91012/t/t517td
LT GRN,/RED
BLK
Wire side of female terminals
Disconnect the 18P connector from the oower door lock control unit.
CAUTION: To prevent damage to the actuator, apply baftery voltage only momentarily.
Cavity WileTest conditionTest: Desired resultPossible cause if result is not obtained
BLU/RED
YEL/RED
WHT/GRN
GRN/WHT
IYEURED
Connect the YEURED
terminal to the WHT/
GRN terminal, and the
WHT/RED terminal to
the BLK terminal
momenraflty,
Check door lock operation:
All passenger's doors should
untocK.
Blown No. 51 (20 A) fuse in the
under-hood fuse/relay box
Faulty actuator
An open in the wire
5BLU/RED
Connect rhe BLU/RED1
terminal to the WHT/
GRN terminal, and the
WHT/RED terminal to
the BLK terminal
momenlaflry_
Check door lock operation:
Driver's door should unlock.
7WHT/RED
Connect the WHT/RED
terminal to the WHT/
GRN terminal, and the
YEURED terminal to
the BLK terminal
momenlaflry.
Check door lock operation:
All passenger doors should lock.
23-260

I
Reconnect the 18P connector to the power door lock control unit
Cavitv Wire Test condition Tost: Desired resultPossible cause it r€sult is not obisinod
23-261
l-l
'10GRNA/VHTDriver's door lock
switch in LOCK
Check for voltage to groundl
There should be 1 V or less.
. Faulty driver's door lock switch. Poor grou nd (G551)
. An open in the wire
9GRN/ORNDriver's door lock
swirch in UNLOCK
2BLU,ryVHT
Driver's door lock knob
in LOCK
Check for voltage to ground:
There should be 1 V or less.
Faulty driver's door lock actuator
Poor ground {G551)
An open in the wire
3BLU/RED
lgnition key inserted
into the ignition key
swttcn
Check for voltage to groundl
There should be 1 V or less
Check for voltage to ground:
There should be 4 V or more
Ch."k f"r ".lt"r" t. g|'"r^d
There should be banery vollage
Poor ground (G401, G402)
Faulty ignition key switch
An open in the wire
Shon in the wire
A o*n tto gO ,i5 A' fr." in tf'"
Lrnder hood fuse/relay box
Faulty combination light switch
An open in the wire
lgnition key removed
from the ignition key
swtrcn
RED/BLK
Combination light
switch in " :m: "
position
LT GRN/
RED
Each door open, one at
a trme
Check tor voltage to ground:
There should be 1 V or less.
Faulty door swilch
An open in the wire
GRY
U nder all conditionsBlown No. 52 (15 Al fuse in the
under hood fuse/relay box
Faulty horn
Fau lty horn relay
An open in the wire
Connect to ground:
Horn should sound.

Power Door Locks
Audio Unit {Keyless Receiver Circuitl Input Test ('96 - 98 models}
Remove the audio unit, then disconnect the A and B connectors (see page 23-189).
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 anv test indicates a problem, find and correct the cause, then recheck the system
lf all the inout tests prove OK, the control unit must be faulty; replace it.
A CONNECTOBB CONNECTOR
16P CONNECTORS
AUDIO UNIT
L
2.
WHT/BLU YEL/RED
{KEYLESS RECEIVER CIRCUIT}
23-262

)
l-l
Disconnect the A and B connectors from the audio unit.
Cavity WireTest conditionTest: Desired resultPossible cause if result is not obtained
Reconnect the B connector only to the audio unit.
Cavity WireTest conditionTest: Desired resultPossible cause iI result is not obtained
B9GRN/ORN
Driver's door lock
switch in UNLOCK
Check for voltage to ground:
There should be 1 V or less.
. Poor ground 1G551). Faulty driver's door lock switch. An open in the wire. Short in the wireDriver's door lock
switch in LOCK
Check for voltage to grou nd:
There should be 4 V or more.
810G R NAr'r'HT
Driver's door lock
switch in UNLOCK
Check for voltage to ground:
There should be 4 V or more.
. Poor ground (G551)
. Faulty driver's door lock switch. An open in the wire. Shon in the wireDriver's door lock
switch in LOCK
Check lor voltage to ground:
There should be I V or less.
23-263
A4WHT/BLU
LJnder all conditionsCheck {or voltage to ground:
There should be battery voltage.
. Blown No. 47 (7.5 A) tuse in the
under hood fuse,i relay box. An open n the w re
A5YEL/RED
lg nition swirch ACC (l)Check for voltage to ground:
There should be battery voltage.
Blown No. 28 , I0 A) f use in the
under dash fuse.elay box
An open " :ne n re
Check for voltage to ground:
There should be battery voltage.
Check for continuity to groundr
There should be continuity.
B o$. \. '.1 - 5 A' iuse n the
,,^oe' aas_'-se relay box
A_ ooe^ ' :ne wrre
Pc.' E'o--d rG401, G402)
A- ooen n lhe wire
B6B LK,/YE L
lgnition switch ON0l)
8158LK
Under all conditions
B1BLU/RED
lgnition key inserted
into the ignition key
swrtch
Check for voltage to ground:
There should be 1 V or less
Check for voltage to ground:
There should be 4 V or more
Poor ground (G401, G402)
Faulty ignition key switch
An open in the wire
Short in the wire
An open in the wireCheck for continuity berwee. lFe
audio unit 16P connector l-o 3ler-
minal and power door lock control
unit 12P connector No. 6 lermrnal:
There should be continu ty
lgnition key removed
from the ig nition key
swtlcn
B3B LUlt/E L
U nderall conditions
B8LT GRN/
BLK
Ceiling light switch in"middle position"
Connect to ground:
The ceiling lighr shouldcome on.
Blown No.43 (7.5 A) fuse in the
under-hood Iuse/relay box
Blown ceiling light bulb
Fau lty ceiling light
An open in the wire
814LT GRN/
RED
Each door open, one at
a time
Check tor voltage to ground:
There should be'l V or less.
. Faulty door switch. An open in the wire
Br6GRY
U nderall conditionsConnect to groundl
Horn should sound.
. Blown No. 52 ('15 A) fuse in the
under-hood fuse/relay box
. Fau lty horn. Faulty horn relay. An open in the wire