2002 HONDA CIVIC lock

Keyless/Power Door Lock System
Control Unit Input Test (cont'dl
5. Reconnect all connections to the underdash fuse/relay box, and make these input tests at the appropriate connectors on the under-dashfuse/relay box.
'lfanytestindicatesaproblem,findandcorrectthecause,thenrecheckthesystem.. lf all the inputtests prove OK, goto step 6.
CavitvWireTest conditionTest: Desired resultPossible ca use if result is notobtainedc1'l8LUUnder all conditionsAftach to ground:Parking, side marker, licenseplate lights, and tajllights shouldcome on.
Blown No.2 (15A)fuse in the underhood fuse/relay boxFaulty taillight relayFaulty under-dash fuse/relay boxAn onen in rhc wireBLU/BEOUnder all conditionsAttach to ground:Headlights should come on.Blown No. 15 or 17 (15A)fuse in theunderhood fuse/relay boxFaulty headlight relay '1 or 2An ooen in the wireJ2WHT/REDUnder all conditionsCheck for voltage to ground:There should be battery voltage.Blown No.9 (15A)fuse in the under-hood fuse/relay boxAn oncn in thc wircBLKUnder all conditaonsCheck for voltage to ground:Thcre shouln hc 1 V or lpqsPoor ground (G501)An ooen in the wireJ6OBNUnder allconditionsAttach to ground:The horns should sound.Blown No. 7 (15A)fuse in the underhood fuse/relay boxFaulty horn relayFaulty hornsAn 6nen in rhe wireJ7Under all conditionsCheck for voltage to ground:There should be battery voltage.Elown No. 16 (20A)fuse in the underhood fuse/relay boxAn oocn in ihc wi.cP18BEDHatch openCheck for voltage to ground:There should be 1 V or less.Poor ground (G552)Faulty hatch latch switchAn oncn in rhc wirFHatch closedCheck for voltage to groundlThere shoul.l he 5 V or moreFaulty hatch latch switch
GBNDriver's door openCheck for voltage to g.ound:There should be 1 V or less. Faulty driver's door switch. An ooen in the wireDriver's door closedCheck for voltage to ground:There should be 5 V or more.Faulty driver's door switchShort to oroundo4LT GRN/REDPassenger's door openCheck for voltage to ground:There should be 1 V or less.Faulty passenger's door switchAn ooen inthewirePassenger's door closedCheck for voltage to groundlThere should be sVor more
. Faulty passenger's door switch. Short to oroundX5REDAVHTlgnition key inserted intothe ignition swhchCheck for voltage to ground:There should be 1 V or less.Poor ground {G401)Faulty ignition key switchAn ooen inthewirelgnition key removed fromrhe ionition switchCheck for voltage to ground:There should be 5 V or more.Faulty ignition key switchShort to oroundY1WHT/BLKDriver's door lock knobswitch unlockedCheck for voltage to groundlThere should be 1 V or less.Poorground (G50'l)Faulty driver's door lock knob switchAn open in the wireDriver's door lock knobCheck for voltage to groundlIhere should be 5 V or more.Faulty driver's door lock knob switchShort to oroundY8YEUREDDriver's door lock knobswitch lockedCheck for voltage to groundlThere should be 1 V or less.Poorground (G50'l)Faulty driver's door lock knob switchAn oncn inihewireDriver's door lock knobswitch unlockedCheck for voltage to ground:There should be 5Vor more' Faulty driver's door lock knob sw;tch. Shorr to oroundY10WHT/GRNDrtver's door lock switchunlockedCheck for voltage to groundlThere should be 1 V or less.Poorground (G501iFaulty driver's door lock switchAn ooen in the wireDriver's door lock switch inCheck for voltage to ground:Therc shorl.l be 5V or m6rpFaulty driver's door lock switchShort to o rolrndY12WHT/BLUDriver's door lock switchlockedCheck for voltage to ground:There should be 'l V or less.Poor ground (G501)Faulty driver's door lock switchAn oDen in the wireDriver's door lock switch inCheck tor voltage to ground:There should be 5Vor moreFaulty driver's door lock switch
22-156
J

6. Disconnect the M, P, K and J connectors from the underdash fuse/relay box, and make these input tests at the connectors.
.lfanytestindicatesaproblem,findandcorrectthecause,thenrecheckthesystem..lfalltheinputtestsproveOK,themultiplexcontrolunitmustbefaulty.Replacetheunder-dashfuse/relayboxassembly.
CavitvWireTest conditionTest: Desired resultPdsiblo c6use if result is not obtain€dK2BLU/ORNUnder all conditionsCheck for continuity betweenthe K2 terminal and the keylessreceiver unit 5P connectordisconnected:There should be continuitv.
An open in the wire
M7YEUBLKConnect J7 terminal to [,47lMgl terminal, and MglMTl terminalto J4
Check actuator operation:The driver's door lock actuatorshould lock lunlockl
Faulty driver's door lock actuatorAn open in the wireM9YEL
M6YEUBLKConnect J7 terminal to M6lMSl terminal, and M8lM6l terminalto J4
Check actuator operation:The passenger's door lockactuator should lock iunlockl
Faulty passenger's door lock actuatorAn open in the wireM8YEL
P16YELConnect J7 terminal to P17lP16l terminal, and P16lP17l terminalto J4
Check actuator operation:The hatch lock actuator shouldlock lunlockl
. Faulty hatch lock actuator. An open in the wireP17YEUBLK
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I
Keyless/Power Door Lock System
Door Lock Actuator Test
Driver's door:
1. Remove the driver's door panel (seepage20-4).
2. Disconnect the 2P connector from the actuator.
Check actuator operation by connecting power and
ground according to the table. To prevent damage
to the actuator, apply battery voltage only
momenlanry.
Terminal
ilil;lll
'l2
LOCKee
UNLOCKee
lf the actuator does not operate as specified,
reprace rr.
4.
22-158
Passenger's door:
1. Remove the passenger's door panel (seepage20-
4).
2. Disconnect the 2P connector from the actuator,
Check actuator operation by connecting power and
ground according to the table. To prevent damage
to the actuator, apply battery voltage only
momenlanty.
Terminal
P."I,l.;--\2
LOCKee
UNLOCKeo
lf the actuator does not operate as specified,
reprace [,

J
Hatch Lock Actuator Test
1. Open the hatch.
2. Remove the hatch lower trim panel lsee page 20-
53).
3. Disconnect the 2P connector from the hatch lock
actualor.
4. Check actuator operation by connecting power and
ground according to the table. To prevent damage
to the actuator, apply battery voltage only
momentaflty.
\TerminalPo.irion\1
LOCK@
UNLOCKo
Terminal side ofmale terminals
22-159

Keyless/Power Door Lock System
1.
Door Lock Knob Switch Test
Remove the driver's door panel (see page 20-4).
Disconnect the 3P connector from the actuator.
Check for continuity between the No. 1 and No. 2
term ana ls.
. There should be continuity when the door lock
knob switch is in the LOCKED position.
. There should be no continuity when the door lock
knob switch is in the UNLOCKED position.
Check for continuity between the No. 2 and No. 3
termtnals.
. There should be continuity when the door lock
knob switch is in the UNLOCKED position.
. There should be no continuity when the door lock
knob switch is in the LOCKED position.
lf the continuity is not as specified, replace the door
locl( actuator.
5.
22-160
'1.
Door Lock Switch Test
Remove the driver's door panel (see page 20-4).
Remove the two mounting screws and the door
lock switch.
Check for continuity between the terminals.
. There should be continuity between the No. 1
and No. 2 terminals when the door lock switch is
in the LOCKED position.. There should be continuity between the No. 2
and No. 3 terminals when the door lock switch is
in the UNLOCKED position.
lf the continuity is not as specified. replace the door
lock switch.
Tr
NO
I
.ti
I.l
I
(
.1
I
1

Transmitter Test
NOTE:. lf the doors unlockorlockwiththetransmitter, but
the LED on the transmitter does not come on, the LED
is faulty. Replace the transmitter,. lf anydoor isopen, you cannotlockthedoorwiththe
transmrtter.. lf you unlocked the doors with the transmitter, but do
not open any of the doors within 30 seconds, the
doors relock automatically.. The doors do not lock or unlock with the transmitter if
the ignition key is inserted in the ignition switch.
1. Press the lock or unlock button five or six times to
reset the transmitter.
. lf the locks work, the transmitter is OK.. lf the locks don't work, go to step 2.
2. Open the transmitter and check for water damage.
. lf you find any water damage, replace the
transmrtter.. lf there is no waterdamage, go to step 3.
3. Replace the transmitter battery (A) with a new one,
and try to lock and unlock the doors with the
transmitter by pressing the lock or unlock button
five or six times.
. lf the doors lock and unlock, the transmifter is OK.. lf the doors don't lock and unlock, go to step 4.
Reprogram the transmitter, then try to lock and
unlock the doors.
. lf thedoors lockand unlock.thetransmitter is OK.. lf the doors don'tlockand unlock, replacethe
transmitter.
4.
Transmitter Programming
Storing transmitter codes:
The codes of up to three transmitters can be stored in
the keyless receiver unit memory. (lf a fourth code is
stored. the code which was input first will be erased.)
NOTE: lt is important to maintain the time limits
between the steps. Make sure the doors and the hatch
are closed.
1. Turn the ignition switch ON (lli.
2. Within 1 to 4 sec., push the transmitter lock or
unlock button with the transmitter aimed at the
receiver in the multiplex control unit behind the
driver's side of the dash.
3. Within 1 to 4 sec., turn the ignition switch OFF.
4. Within 1 to 4 sec., turn the ignition switch ON (ll).
5. Within 'l to 4 sec., push the transmitter lock or
unlock button with the transmitter aimed at the
receiver in the multiplex control unit behind the
driver's side of the dash.
6. Within 1 to 4 sec., turn the ignition switch OFF.
7. Within 4 sec., turn the ignition switch ON (ll).
8. Within 1 to 4 sec., push the transmitter lock or
unlock button with the transmifter aimed at the
receiver in the mupltiplex control unit behind the
driver's side of the dash.
9. Within 1 to 4 sec., turn the ignition switch OFF,
'10. Within 4 sec., turn the ignition switch ON (ll).
11. Within 1 to 4 sec., push the transmitter lock or
unlock button with the transmitter aimed at the
receiver in the multiplex control unit behind the
driver's side of the dash.
12. Confirm you can hearthe sound ofthe door lock
actuators. Within 1 to 4 sec., push the transmitter
lock or unlock button again,
13, Within 10 sec., aim the transmitters (up to two
additional ones) whose codes you want to store at
the receiver, and press the transmitter lock or
unlock buttons.
Confirm that you can hear the sound of the door
lock actuators after each transmitter code is stored.
14. Turn the ignition switch OFF, and pull out the key.
'15. Confirm proper operation ofthe transmitter.
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ISystem Descriptions
The Multiplex Control System has four internal
functions:. Multiplexing (send multiple signals over sharedwtres). Wake up/sleep (runs at full power only on demand toreduce battery draw). Fail-safe (fixes or ignores faulty signals). Self-diagnosis (Mode 1 for the system, Mode 2 for
input lines)
The system controls the function of these circuits:. Entry lightcontrol (ignition key lightandceiting light). Wiper/washer intermittent wipe and park functions. Keyless/power door lock. Meter assembly, temperature gauge, and indicator
lights. HVAC (compressor and fan control). Key-in reminder. Headlight reminder. Seatbelt reminder
JI
/ar
22-171
Multiplex Communication
To reduce the number of wire harnesses, digital signals
are sent via shared multiplex communication linesrather than sending normal electrical signals throughindividual wires.. The input signals from each switch are converted todigital signals at the central processing unit (CpU).. The digital signalsaresentfromthetransmitting unitto the receiving unit as serial signals.. The transmitted signal is converted to a switch signalat the receiving unit, and it operates the related
component or monitors a swltch.. There are exclusive communicalion lines between
the ECM, the gauge assembly, and the under,dash
fuse/relay box.
Wake-up and Sleep
The multiplex control system has "wake-up" and"sleep" functions to decrease parasitic draw on the
battery when the ignition switch is OFF.. ln the sleep mode, the multiplex control unit stops
functioning (communication and CPU control) when it
is not necessary for the system to operate.. As soon as any operation is requested (for example, adoor is unlocked), the related control unit in the sleep
mode immediately wakes up and begins to function.. When the ignition switch is turned OFF, and the
driver's or front passenger's door is opened, then
closed, there is about a 10 second delay before the
control unit goes from the wake-up mode to the sleepmode.. lf any door is open, the sleep mode will not function.. lf a key is in the ignition switch, the sleep mode will
not function.. When in sleep mode, the draw is reduced from
70 80 mA to less than 10 mA.
Fail-safe
To prevent improper operation, the multiplex controlsystem has a fail-safe function. In the fail-safe mode,
the output signal js fixed when any part of the systemmalfunctions (for example a faulty control unit orcommunication line).
Each control unit has a hardware fail-safe function thatfixes the output signal when there is any CPUmalfunction, and a software fail-safe function thatignores the signal from the malfunctioning control unitand allows the system to operate normally.

9.
10.
Remove the B-pillar upper trim {see page 20-50)
Remove the shoulder anchor adjuster{A).
22 N.m (2.2 kgf.m, 16lbf.ftl
Installthe seat belt in the reverse order of removal,
and note these items:
. lf thethreads on the retractor mounting self-
tapping ET screw are worn out, use an oversized
self-tapping ET screw (P/N 90133-SZ4-0030)
made specifically for this application.. Check that the retractor locking mechanism
functions (see page 23-9).. Assemble the washers, collars, and bushing on
the upper and lower anchor bolts as shown.. lf the seat belt tensioner has been deployed
replace the front seat belt protector with a new
one.. Apply liquid thread lock to the anchor bolts
before reinstallation.. Before installing the anchor bolts, make sure
there are no twists or kinks in the front seat belt.. Make sure the seat belt tensioner connector is
plugged in properly.
. Reconnect the negative cable to the battery.. Enter the anti-theft code for the radio, then enter
the customer's radio station presets.
. Reset the clock.. Do the ECM/PCM idle learn procedure {see page
11,139).
11.
8 x 1.25 mm
UPPER ANCHORBOLT
BUSHING
Upper anchor bolt construction:
UPPER ANCHOR
Lower anchor bolt construction:
COLLAR
TOOTHEDLOCK WASHER
LOWER ANCHOR BOLTTOOTHED LOCK WASHER
{cont'd)
WASHER
23-5