1999 HONDA CIVIC mat

Power Door Locks
Transmitter Test
NOTE:
. lf the doors unlock or lock with the transmitter, but
the LED on the transmitter does not come on, the
LED is faulty; replace the transmitter.
. lf any door is open, you cannot lock or unlock the
door with the transmitter.
. lf you unlocked the doors with thetransmitter, 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. Using a keyless entry checker (07MAJ - SP003001:
. Place the transmitter on the keyless entry check-
er, and press the transmitter button.
- lf the indicator light does not come on, check
for:- a dead or low batterv- Faulty transmitter- lf the ray indicator light comes on, the trans-
mitter is OK.
KEYLESS ENTRY CHECKER
INDICATOR LIGHT
TRANSMITTER
NOTE: After a transmitter battery has been
replaced, aim the transmitter at the receiver, and
press the transmitter button six times,
Confirm you can hear the sound of the door lock
actuators when vou press the si)dh time.
23-266

Description
)
The sRS is a safety device which, when used in coniunction with the seat belt, is designed to help protect the driver land
front passenger) in a frontal impact exceeding a certain set limit. The system consists of the sRS unit {including safing
sensor and impact sensor), the cable reel, the driver's airbag (and front passenger's airbag)
FRONT PASSENGEB'SAIRAAG
DRIVER'S AIRBAG
CABLE REEL
SRS UNtT
t
Operation
The main circuit in the SRS unit senses and judges the force of impact and, if necessary, ignites the inflator charge(s) lf
battery voltage is too low or power is disconnected due to the impact, the voltage regulator and the back-up power clrcult
resoectivelv will keep voltage at a constant level.
For the SRS to operate:
(1) The impact sensor must activate. and send electric signals to the mlcroprocessor'
(2) The microprocessor must compute the signals' and must send signals to the airbag inflator(s)'
{3) The inflator(s) must ignite and deploy the airbag(s)'
_"-_-l
Ir3B!#h i
!.. I
ffi,*
Self-diagnosis System
A self-diagnosis circuit is built into the SRS unit; when the ignition switch is turned ON (ll), the SRS indicator light comes
on and goes off after about six seconds if the system is operating normally
lf the liglt does not come on, or does not go off after six seconds, or if it comes on while driving, it indicates an abnormal-
ity in the system. The system must be inspected and repaired as soon as possible
For better serviceability, the memory will store the cause of the malfunctlon, and the data link circuit passes on the infor-
mation from the memory to the data link connector (DLC). This intormation can be read with the Honda PGM Tesler con-
nected to the DLC (16P).
l,
24-5

Precautions/ Procedures
)General Precautions
r Carefully inspect any SRS part before you install it Do
not install any part that shows signs of being dropped
or improperly handled' such as dents, cracks or defor-
mation:
- Airbags- Cable reel
- SRS unit
-
Use only a digital multimeter to check the system lf
it's not a Honda multimeter, make sure its output ls
1O mA (0.01 A) or less when switched to the smallest
value in the ohmmeter range. A tester with a higher
output could damage the airbag circuit or cause acci-
dental deployment and possible injury'
I Do not install used SRS parts from another vehicle
When making SRS repairs, use only new pans'
) Except when performing electrical inspections'
always disconnect both the negative cable and posl-
tive cable from the battery, and wait at least three
minutes before beginning work
r Replacement of the combination light and wiper/
washer switches and cruise control switch can be
done without removing the steering wheel:
- Combinalion light and wiper/washer switch replace
ment, see section 23
- Cruise control sevresume switch replacement' see
section 23.
. Whenever the ignition switch is ON {ll), or has been
turned OFF for less than three minutes' be careful not
to bump the SRS unit; the airbag(s) could accidental-
ly deploy and cause damage or injury'
. Whenever the airbag{s) has(have) been activated'
replace the SRS unit.l,
2+7
Airbag Handling and Storage
Do not try to disassemble the airbag assembly. lt has no
serviceable parts Once an airbag has been operated
(deployed). it cannot be repaired or reused'
For temporary storage of the airbag assembly during ser-
vice. olease observe the following precauttons:
. store the .emoved airbag assemblv with the pad sur-
face uo The driver's (and front passenger's) airbag
connecto''s'-as {have) a built.in short contact (see
page 2a-l 1
: | ..r r-+r-a k imninncrlv slorcd lace down,-""dd.r6t dtatltt-,tl could propel the unit whh enough
force lo c.usa 3a.ix! intury
AIRBAG CONNECTORS(With built in shon contact)
. Store the removed airbag assembly on a secure flat
surface away from any high heat source {exceeding
212"FI1OO"CJ and free of any oil' grease, detergent or
water.
CAUTION: lmproper handling or storage can intern'lJy
damage the airbag assembly, making it inoperativo
lf you suspect the airbag assembly has been dam€cd'
inslall a new unit. and relsr lo the Deployment/DisPG'l
olocedules for disposing ol the damaged airbag

Preca utions/Procedures
Spring-loaded Lock Connector
Some SRS system connectors have a spring-loaded lock.
Disconnecting
To release the lock, pull the spring-loaded sleeve towardthe stop while holding the opposite half of the connecror.Then pull the connector halves apart.
NOTE: Be sure to pull
connector half.
on the sleeve and not on the
SPRING-LOADEOSLEEVE
Do not pull on thishalf of the connector.
Connecting
1. Hold the pawl-side connector half, and press on theback of the sleeve-side connector half in the directionshown. As the two connector halves are pressed
together, the sleeve is pushed back by the pawl.
NOTE: Do not touch the sleeve.
When the connector halves are completely connected,the pawl is released, and the spring-loaded sleevelocks the connector.SPRING.LOADEDSLEEVE
24-10
Spring-loaded Lock Connector with
Built-in Short Contact
The driver's ajrbag (and front passenger,s) airbag has(have) a spring-loaded lock connector with a builr-inshort contact. When this connector is disconnected, thepower terminal and the ground terminal in the airbaaconnector are automatically shoned.
Connector halves disconnected:
SHORT CONTACT
Conneqtor halves connected:
GROUND TERMINAL
CABLE REEL CONNECTOR
GROUND TERMINAL

Precautions/Procedu res
Steering-related Precautions
Stesring Wheel and Cable Reol Alignment
NOTE: To avoid misalignment of the steering wheel on
reassembly, make sure the wheels are turned straight
ahead before removing the steering wheel.
Rotate the cable reel clockwise until it stops.
Then rotate it counterclockwise {approximately two and
a half turns) until the arrow mark on the cable reel label
points straight up.
24-12
:l
St€€rin9 Column Removal
CAUTION:
. Eefore removing thg stggring column. disconnect the
connsstor bqtween the cable r€el and th€ SRS msin
harness.
. lf the stoering column is going to be romoved with-
out dismounting th6 stoering wheel, lock the steer-
ing by turning the ignition key to o-LOCK position, or
remove the key trom the ignition switch so that the
steering wheel will not turn.
NOTE:
When the airbag and cable reel are disconnected,
don't reconnect the battery cable. lf the battery is
reconnected and the ignition switch is turned ON (ll),
the SRS unit will store this as an open in the driver's
airbag inflator, and the SRS indicator light will come
on.
For disconnecting the spring-loaded lock type con-
nector, refer to page 24-'10.
SRS MAIN HARNESS2P CONNECTOR
Do not replace the original steering wheel with any other
design because it will make it impossible to properly
install the airbag (only use genuine Honda replacement
parts).
After reassembly, confirm the wheels are still turned
straight ahead and that the steering wheel spoke angle
is correct. lf minor spoke angle adjustment is necessary,
do so only by adjusting the tie-rods, not by removing
and repositioning the steering wheel.

rl
Troubleshooting
t)
Self-diagnostic Procedures
The self-diagnostic function of the SRS system allows it to locate the causes of system problems and to store this informa' I
tion in memory. For easier troubleshooting, this data can be retrieved via a data link circuit l
. When you turn the ignition switch ON (ll), the SRS indicator will come on. ll it goes off after six seconds. the system is
norma l.
. lf there is an abnormality, the system locates and defines the problem, stores this information in memory, and turns
the sRS indicator light on. The data will remain in the memory even when the ignition switch is turned off or if the bat-
tery is disconnected.
o when you connect the scs service connector to the service check connector (2P), and turn the ignition switch oN (ll),
thesRsindicator|ightwi||indicatethediagnostictroub|ecode(DTC)bythenumberofb|inks.
. After reading and recording the DTC. proceed with the troubleshooting for this code'
Precauiions
.Useon|yadigita|mU|timetertocheckthesystem'|fit,snotaHondamu|timeter,makesureitsoutputisl0mA(0.01A)
or|esswhenSwitchedtothesma||estva|ueintheohmmeterrange,AtesterwithahigheroUtpUtcoulddamagethe
airbag circuit or cause accidental airbag deployment and possible injury'
r when-ever the ignition switch is oN (ll). or has been turned oFF for lessthan three minutes, be careful nottobumpthe
SRS unit; the airbags could accidentally deploy and cause damage or injuries
. Before you ,"n1ou" th" SRS main harness, disconnect the driver's airbag connector (and the front passenger's airbag
connector).
. Make sure the battery is sufficiently charged {see section 23}. lf the battery is dead or low, measuring valLles won t be
correct.
. Do not touch a tester probe to the terminals in the sRS unit or harness connectors, and do not connect the terminals
with a jumper wire. Use only the backprobe set or the special tools'
For backprobing spring-loaded lock type connectors, refer to page 24-9'
Reading the DTC
when the SRS indicator light is on, read the DTC using one of these methods:
A. Connect the Honda PGM Tester to the 16P Data Link Connector {DLC), and follow the tester's prompts lf the tester
indicatesnoDTc,DTcg-1orDTc9-2,doub|e-checkbyjumpingtheservicecheckconnectorandwatchingthesRS
indicator light (see next Page)
HONDA PGM TESTER
DATA LINK CONNECTOR Il6PI
l,
24-13

Airbag
)Replacement
After a collision in which the airbags were deployed' the
airbag assemblies and the SRS unit must be replaced'
!!!@ Store a removed airbag with the pad sur'
iFup. rr trt" airbag is improperly stored face down'
accidental deployment could propel the unit with
enough force to cause serious iniury'
CAUTION:
. Always disconnsct lhe airbag conn€ctor(s) when the
harness is disconnected.
. Do not disassemble or tamper with the ailbag'
NOTE:
. Do not install used SRS parts from another vehicle'
When repairing, use only new SRS parts'
o Carefully inspect the airbag before you install it Do
not insiall an airbag that shows signs oI being
dropped or improperly handled, such as dents' cracks
or deformation.
1. Disconnect the battery negative cable' then discon-
nect the positive cable from the battery' and wait at
least three minutes
2. Disconnect the airbag connector(s):
Driver's Side:
. Remove the access panel from the steering wheel'
then disconnecl the 2P connector betlveen the driv-
er's airbag and cable reel
NOTE: When disconnected, the airbag connector ls
automaticallY shorted
ORIVER'SAIRBAG
DRIVEE'S AIRBAG2P CONNECTOR
oo
Front Passengel's Side:
. Disconnect the 2P connector between the front pas-
senger's airbag and SRS main harness'
NOTE: When disconnected, the airbag connector is
automaticallY shorted.FRONT PASSENGER'S
AIRBAG2P CONNECTOR
3. Bemove the airbag(s):
Driver's Side:
. Remove the two Torx bolts using a Torx T30 bit' then
remove the driver's airbag
(cont'd)
24-67
SRS MAIN HARNESS
Use a Torx T30 bitTORX BOLTS

Gable Reel
Replacement
!@@ store a .emove airbag assambly with thepad surtace up. lf the airbag is improperly stored face
down, accidental deploymont could propel the unit withenough force to cause sorious iniury.
CAUTION:
. Alwsys disconnect the airbag connoctor(s) when ih€harness is disconngcted.
. Do not disassemble or tamper with the airbag.
NOTE: Carefully inspect the airbag assembly beforeinstalling it. Do not install an airbag that shows signs ofbeing dropped or improperly handled. such as dents,cracks or deformation.
l.Disconnect the battery negative cable. then discon-nect the positive cable from the battery, and wait atleast three minutes.
Remove the access panel from the steering wheel,then disconnect the 2P connector between the driv-er's airbag and cable reel.
NOTE: When disconnected, the airbag connector isautomatically shorted.
DRIVER'SAIRBAG
)
24-72
or
TORX EOLTSUse a Torx T30 bit.
DRIVEB'S DASHBOARD LOWER COVER
4.
Make sure the wheels are aligned straight ahead.
Remove the driver's dashboard lower cover.
5. Remove the two Torx bolts from the steering wheel,and disconnect the horn connector. Then removethe driver's airbag.
\