1999 HONDA CIVIC ect

16. Install the steering wheel nut, and connect the horn
connector to the steering wheel. Then install the
driver's airbag.
TORX SOLTS9.8 N m 11.0 kgf m, 7.2 lbtftlReplace.Use a Torx T30 bit.
STEERING WHEEL NUT50 N.m 15.0 kgf.m,36lblft)Replace.
DRIVEB'SAIRBAG
DRIVER'S2P CONNECTOBHORN CONNECTOB
I
17.Attach the cable reel 2P and 3P connector to the con-
nector holder. Then install the driver's dashboard
lower cover.
)UDRIVER'S DASHBOARD LOWER COVER
24-75
18. Reconnect the driver's airbag 2P connector to the
cable reel 2P connector. and reinstall the accesspanel on the steering wheel.
19. Reconnect the battery positive cable, then the nega-
tive cable.
20. After installing the cable reel, confirm proper sys-
tem operation:
Turn the ignition switch ON (ll); the SRS indica-
tor light should come on for about six seconds
and then go off.
Make sure both horn buttons work.
Make sure the headlight and wiper switches
Go for a test drive, and make sure the cruise con
trol switches work.
a
a

SRS Unit
Replacement
CAUTION:
. Betore disconnoqting lny pErt of the SRS wire hal-ness, disconnect th9 airbag conn"ctorlsl.. During installltion or teplacemsnt. do not bump(impact w.cnch, hamm€r stc.l the area noar tho SRSunit.
NOTE:
o Do not damage the SRS unit terminals or connectors.. Do not disassemble the SRS unit; it has no service-able parts,
. Store the SRS unit in a clean, dry a.ea,. Do not use any SRS unit which has be€n subjected towater or shows signs of being dropped or improperlyhandled. such 8s dents, cracks or deformation.
1. Disconnect the bsttery negative cable. then discon-nect the positive cable from the battery, and wait atleast three minutes.
2. Disconnect the airbag connector{s}:
NOTE: When disconnected, the airbag connector isautomatically shorted,
Driver's Side:
. Remove the access panel from the steering wheel.then disconnect the 2P connector between the driv_er's airbag and cable reel (see page 24-11).
Front Passenge/s Side:. Disconnect the 2P connector between the tront oas_senger's airbag and SRS main harness (see page 24-11).
24-76
o\
3. Remove the right side cover from the SRS unit.
SRS UNTT
TOBXBOLTSUge a TorxT30 bit.
RIGHT SIOE
Remove the left side cover from the SRS unit, thendisconnect the SRS main harness lgp connectorfrom the SBS unit.
SRS UNIT
5. Remove the four Torx bolts from the SRS unit, thenpull out the SRS unit from the driver,s side,
COVER

6. Install the new SRS unit.
NOTE: Do not reuse a torx bolt that has red
threads. Replace the bolt with a new one.
)
7.
TORX BOLTS9.8 N.m l'1.0 kg{.m, 7.2 lbf.ft}Use a Torx T30 bit.
Connect the SRS main harness l8P connector to the
SRS uniu push it into posjtion until it clicks.
Install the SRS unit covers (ri9ht and left). Make
sure the covers snap together in the middle.
8.
TORX BOLTS9.8 N.m 11.0 kgf.m, 7.2 lbf.ft)U3e . Torx T30 bit.
SRS MAIN HARNESS
)(l
9.
10.
't2.
Reconnect the driver's aibag 2P connector to the
cable reel 2P connector, then reinstall the access
panel on the steering wheel.
Reconnect the tront passenger's airbag connector
to the SRS main harness.
Reconnect the battery positive cable, then the nega
tive cable.
After installing the SRS unit, confirm proper system
operation: Turn the ignition switch ON (ll); the SRS
indicator light should come on for about six seconds
and then go oif.
11.
24-77
.-

Contents
How to Use This Manual ICircuit Schematics (see Circuit Index)Fuse/Relaylnformation 6Ground-to-Componentslndex 6-6ComponentLocationPhotooraohs 201Conriector Views 202
Circuit Index
Accessory power socket 155Air conditionerAir delivery'96198 models 61'99-'00 models 61-2Blower controls'96198 models 60'99100 models 60-1Compressor controls 62Fans 63Anti-lock brake system (ABS) 44A/T gear position indicatorCVT 89All except CVT 89-1Automatic transmission controlsAll '96-'98 models except CVT and GX 39All '99100 models except CVT 39-8All GX models 39-8'96-'98 CVT 39-4'99100 cw 39-12Back-up lightsCoupe and Sedan 110Hatchback l'10-1Brake lightsAll Coupes and'96-'98 Sedans 110-15'99-'00 Sedans 110-16Hatchback 110-17Brake system indicator light'96198 models 7'1'99100 models 71-1Ceiling light 114-3Charging system 22Condenser fan 63Console lights 114Cruise control 34Dash lights 114Daytime running lights 110- 13Engine coolant temperature gauge 81-1Fog lights 110-10Front parking lights 110-2Fuel gauge 81-1Fuse/relay boxUnder-dash 6Under-hood 6-4Underhood ABS 6-3Gauges 81Ground distribution 14Ground-to-Componentslndex 6-6Hazard warning lightsAll except '99100 Sedans 110-6'99100 Sedans 110-8Headlights 110-12Headlight switch 100Heater - See Air ConditionerHorn'96197 models 40'98 model 40-1'99100 models 40-2lgnition key reminder 73lgnition systemAll '96198 models except Dl685 20All '99100 models except D16Y5 with Mn 2O-2All D1685 engines 20-2'99-'00 D 16Y5 with M/T 20
lndicators 80Integrated control unit 70lnterlock systemAll except'96J98 CVT 138'96198CVT 138-1License plate lightsAll Coupes and '96-'98 Sedans I l0-3'99100 Sedans 1 10-4Hatchback 110-5Low fuel indicator light 74Moonrool'96197 models |22'98-'00 models 122-1Odometer 81Oil pressure indicator light 80-3Power distributionBattery to ignition switch, fuses, and relaysFuses to relays and components 10-2Power door locksAll models without keyless entry 130'96-'98 models with keyless entry 130-2'99100 models with keyless entry 130-12Power mirrorsWithout detogger 141With defogger '141-2
Power windows 120Programmed fuel injection system (PGNr-Fl)All '96-98 models except D1685 23All '99-'00 models except D16Y5with M/T and D1685 24All D1685 engines 25'99100 D16Y5 with M/T 23Radiator fan 63Rear window defogger'96-,98 models 64'99100 models 64-1Seat belt reminder 73Security system'96.'98 USA HX, LX, EX 133'96-'98 Canada EX, Si 133'99TOO USA HX, LX, EX, DX.V Si 133-4'99100 Canada EX, Si 133-4All CX and DX models 133-8Speedometer 81Starting systemA./T (All except Dl685) 21A"/r (D16Bs) 21-1Manualtransmission 21-2Slereo sound system 150Supplemental rastraint system (SRS) 47Tachometer 81TailliqhtsAllboupes and'96-'98 Sedans 110-3'99100 Sedans 1 10-4Hatchback 110-5Trunk light 114-3Turn signal lightsAll except'99100 Sedans 110-6'99-'00 Sedans 1 10-8Vehicle speed sensor (VSS) 33Wiper/washerFront 91Rear 92
10

How To Use This Manual
The next few pages describe how this manual is organized. They also
explain what kind of information the manual contains, what that
informalion means, and how to use it to troubleshoot electrical problems.
Circuit schematics break the entire electrical system into individual
systems, like the Low Fuel lndicator Light on the nelit page.
Only electrical components that work together are shown together,
so you won't be distracted by unrelated wires.
Explanations of the abbreviations and svmbols used in the schematics
begin on page [Fl. You'll need to know what they mean before you can use
a schematic effectively.

How To Use This Manual
Circuit Schematics
oa
Each schematic represents one circult. A
circuit's wires and components are arranged
to show current flow, from power at the top of
the page, to ground, at the bottom.
Shared Circuits
Other circuits may share power or ground
terminals or wiring with the circuit shown. A
wire that connects one circuit to another, for
example, is cut short and has an arrowhead
at the end of it pointing in the direction of
current flow. Nelit to the anowhead is the
name o{ the circuil or comoonent which
shares that wiring. To quickly check shared
wiring, check the operation of a component it
serves. lf that component works, you know
the shared wiring is OK.
Connectors
All in-line and fuse box connectors are
numbered (C725, C416, etc.).
Component connectors are not numbered
but are identiJied by the name of the
component. lf a componenl has more than
one connector, each connector is assigned
a letter (A, B, C, etc.). Below most connector
numbers and comDonent names are
PHOTO and VIEW numbers. The PHOTO
number refers to a Dhoto in the back of the
book that shows lhe conneclor's location on
the car. The VIEW number refers to an
illustration in the back of the book that
shows the connector face, wire colors,
connector cavity numbers, and other details.
The connector cavity numbering sequence
begins at the top left corner oJ the connector
as seen from either of the viewooints shown
on page ffl . Disregard any numbers
molded into the connector housino.
Wires
Wires are identilied by the abbreviated
names of their colors; the second color rs the
color of the stripe. Wires are also identified by
their location in a connector. The number '2"
next to the male and female wire terminals at
C416, for example, means those terminals
join in cavity 2 of connector C416.
Symbols
A complete description of schematic
symbols begins on page | 8
"HOT" label tells you whenthe ignition switch suppliespower to the fuse. \
Artowhead meanswire connects toanother circuit;
Arrow with note rErngother circuils conncct h€re.
it .a
llu":: ^,{ ii t See Power Distribution, .I t----t oaqe tO-3. IL*--:--------J2 Y C723 Junction connectorYEL I Pao'o'8 more bus bars in it;
I - " " to two or more wire
l,/
-t>?
See PowerDistribution,page 10-3.
UNDER.DASHFUSE/RELAYBOX
has one oleach connactgterminala.
it ooints in directionof current flow.
TheImletor
t_I
Cavity number; L ---
Jiili'iJi!--' -----> '
shoin on page S .
Maleterminal
L?*?l?,-
"'"'I
c725
vlEUt/ 75
Connector number;index begins onpage 203.
Number ot photoin back ol bookshowing componentlocation on cat.
Number ofconneclor viewin back of book
7
GBN/FEO
See Ground
Soe Indicators I ASSEMBLY
:-------J
LOW FUELINDICATOFLIGHT r-l
EI
A
"o'r"/PHOTO 52 <-
\
FUELTANKUNIT
Splice ---------) O rr ".* I Page 14'4'
IBroken wire means | --^ -
iar";J.'It,;,rJ;ii; -----i Bffi,Bili*l
elsewhere. I 0a0e tn-a
IBrK Icround --->lL c301: ptioro 21