1996 HONDA CIVIC iat

How To Use This Manual
Troubleshooting Tests
Testing for Voltage Drop
Wires, connectors, and switches are designed
to conduct current wilh a minimum loss of
voltage. A voltage drop of more than one volt
indicates a Droblem.
'1. Place the digital volVohmmeter (DVOM) in
the appropriate DC volts range. Connect
the positive lead to the end of the wire
(or to the connector or switch) closest to
the bafterv.
Connect the negative lead to the other
end of the wire (or the other side of the
connector or switch).
Turn on the components in the circuit.
The DVOM will show the difference
in voltage between the two points. A
difference, or drop, of more than one
volt indicates a oroblem. Check the
circuit for loose, dirty, or bent terminals.
co
Testing lor a Short with a Test Light or DVOM
1. Remove the blown fuse and disconnect
the load.
2. Connect a test light or digital
oltr'ohmmeter
(DVOM), switched to the appropnare DC
volts range, across the tuse lerminals to
make sure voltage is present. You might
have to turn the ignition switch to ON:
check the schematic to see.
<-s80RT TOGFOUNO
Disconnecl lheload here.
Beginning near the luse box, wiggle the
harness. Continue this at convenient ooints
about six inches apart while watching the
test light or DVOM.
Where the test light goes off, or the DVOM
voltage drops to zero, there is a short to
ground in the wiring near that point.
NOTE: Always use a DVOM on high
impedance circuits. A test light may not
glow (even with battery voltage present).
3''
ffito.'"o'o
.t.
TEST LIGHTolDVOM

Fuse
NumberFuse NameAmpsPage
BATTERY
Component or Circult Protected
Power distribution
lgnition switch
INTERIOR LIGHT | 7.5 | 10-10 | DLC, Ceiling light, Trunk light
FI E/M15 i(20 GX) i
i PGM-FI main relay, Fuel injection relay (GX)
Not used
POWER WINDOW| 10-10 | Power window relay
BACK UPStereo radio iuner ('9G'98 mod€ls), Audio unit ('99100
models), Heater control panel, PCM/ECM, TCM (9e'98
cvr)
HEADLIGHT
REAR DEFROSTER I
DOOR LOCK UNIT,
ROOF
i 10-12i Headlights
Not used
Rear window defogger relay
Power door lock control unit (all except '99-'00 models
with keyless), Keyless door lock control unit ('99-'00
models with keyless), Moonroof
i HORN, SrOP Lri 10-13i Horn relay, Brake switch
HAZARDHazard warning switch
OPTIONI 10-13I Security system (option)
i HEATER MOTOR Ii 10-1 i Blower motor relay
(CONDENSER FAN)
COOLING FANl1o-1
Condenser Jan relay, A'lC compressor clutch relay
Radiator tan relay
&5

Ground-to-Components I ndex
f.,lONOTE: All ground wires are BLK unless otherwise noted.
GroundPageComponents or Circuit Grounded
Battery (BLKYEL)
Steering pump bracket
t+-rg ITransmission housing
l
G101
(-1)
G101
(-2)
14-2
and
14-3
ano
14-1
Powertrain or engine control module (PG1 and pG2 are BLK: LG1 and LG2 are
BRN/BLK), EGR control solenoid valve (CW, EGR valve and lift sensor (Dt6yS enginewith M,/T), Engine coolant temperature switch, pGM-Fl main relay, power steeringpressure switch (USA), Primary HO2S (D16Y5 engine with l\/,/T), Vehicle speed sensor,VTEC pressure switch (D16Y5/D16Y8 engines), CKF sensor (BRN/BLK), Transmission
control module (CYf) (Pc1 is BLK: LG1 is BRN/BLK)
Shielding betvveen the PCM or ECM and these components (all have BRN/BLK wires):
CKF sensor, TDC/CKP/CYP sensor. Primary and secondary heated oxygen sensors.
Knock sensor (CWDl6YB engine), Mainshaft speed sensor (AiT except CVT),
I Countershaft speed sensor (A/T except CVf)
Shielding between the TCM and these components (CVT) (all have BRN/BLK wires):
Drive pulley speed sensor, Driven pulley speed sensor, Secondary gear shaft
speed sensor
Powertrain or engine control module (PG1 and pG2 are BLK; LG1 and LGz are
BRN/BLK), EGR control solenoid valve (D16Y5 engine), EGR valve (Dt685), Engine
coolant temperature switch, Fuel pressure regulator shut-off solenoid valve (D1685),
PGM-FI main relay, Power steering pressure switch (USA), Vehicle speed sensor, VTECpressure switch (All except D16Y7 engine), CKF sensor (A

except 81642) (BRN/BLK)
Shielding between the PCM or ECM and these components (all have BRN/BLK wires):
CKF sensor, TDC/CKP/CYP sensor, Primary and secondary heated oxygen sensors,
Knock sensor (All except D16Y7 engine), i/ainshaft speed sensor (Arf except CW),
Countershaft speed sensor (A,/T except CVf), Drive pulley speed sensor (CW), Drivenpulley speed sensor (CVT), Secondary gear shaft speed sensor (CVf)
I Badiator fan motor, Right front parking/turn signat tight, Right headtight
G20214-4I Cruise control actuator, Left front parking/turn signal lights, Left headlight, Rear window
I washer motor, Windshield washer motor, Washer fluid level switch (,99-'00 Canada)
G401| +-o
and
14-7
Accessory power socket, Brake fluid level switch, Clutch interlock switch (M/T), Clutchswitch (lillT with cruise/D16Y5 engine with MfD, Combination wiper switch (Z wires),
Cruise control main switch, Cruise control unit, Dash lights brightness controller, Data
link connector, Daytime running lights control unit (Canada), Gauge assembly, Horn('96-'97 models), Integrated control unit, Interlock control unit (ArI), Keyless door lock
control unit ('99-'00 models with keyless), Moonroof close and open relays, Moonroof
switch, Park pin switch (A/r), Power window relay, Rear window defogger relay, Rear
window defogger switch ('96-'98 models), Steering lock, Stereo radio tuner (,96-,98
USA: LX, EX, and HX), Turn signal/hazard relay, Windshield wiper motor.....plus
everything grounded through G402
6-6

I
t
I
UNDER-HOODFUSE/RELAY BOXFUSE 52HO3 ,9IO? LTt3a
FUSE 53SATAAD10A
T102PHOTO 9l--
S€e PowerDistrib$ion,page 10-13.
WHT/REDT101PI1oIO 25
I
IJ
I
I
FUSEofiro{{oa
ALTEBNATORPage 22
nI
I
t
--1 UNDER.
sFUSE 55IIEATER MOTONatla
r^-::r BLowER| t,omacl I MoToR
i lF5:ftL--J or 50-1Ptaofo9
FUSE 55(co{DEtsER fAx}204
FUSE 57cooutag FAr204
r^-::I RADIATOR
l*"*!F*x.L--J paoro p
HOODFUSE/NELAYBOX
UNDER-DASHFUSE/RELAY BOXPHO|O 58
FUSE 19AACK UPLlalni75A
FUS€ 15ALIIFI.IATORsF sErson7.5A
\
I
I
If
r--1 coN- r--11'/C COM-lContactt DENSER I Contactl PFESSOR
i i[f*, i iFLug"L--J Page 63 L--J Page 62
To Fus€ l, 2, and 6,see oaos lGl3. STEERINGLOCK
\
l,ut-a--- ---------J
gLXTYEI
FUSE 23(sRs)1(rA
Phofo 10
See PowerDistribdion,pagos 10€and 10-7.
FUSE 3tm w|PEain wAsr{ER}10A
PHOTO 10
See PowerDistribution,page 10-6.
FUSE 24(P,ry AEUn(s/n QELAY)
FUSE 13FU€L PUIIP(sns uRrT)15A
See PowerDisaibution,page 10-3.
FUSE 14{cFrrsE corrtRoL}{rcYLESS)
c913I
I
FUSE9 ,
FUSE 12IURI{UCHTS7,trA
) | , i ]si"ii:-' r|r::::---'--- J/--_-r
i::{;iil i i".ii.l ,#,;:|'-
i-:'ff1tu;.,,, i *=ft;;***
See Powsr Distribution,pages 10-2 and 10-3.
* = '99-'00 models with D16Y7/D16YB
Sea PowerDistribuiion,page 10-4.
:! iii'^': i i lB1%"f;
i L-=r -','lo' i !.---i..-^- ii orsrnrauron i i DtsrRtBUroR :' Page 20 Page 20 or 20'1 '
%[-#
I pHOfO 44 PHO|O 44
1Gl

Power Distribution
- From Fuses to Relays and Components (contd)
FUSE 15AIITIFIIATORsP iE soa754
J-l
c4t912 I C421PHO|O 63virtu is-- : : I lj;:o,19^63
l,lll,nl
tl
i ! [8ig*'"*: : LOAD, I DETECTOR, I GLD} UI{17' | (ELDI u
: i Page 22
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\
VEW 5A
{)
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L-------J
TRANSMISSIONCONTROLMODULE [rCM]Page 39-4
vtEw 69
815
tl
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GAUGEASSEMBLYPage 22-1
, a PHO|O S
, UNDER-HOOD' FUSE/RELAY BOXI PHO|O 7
- '96-'98 CVT
10-4

Ground Distributiofl (cont'd)
- G201 andG202
NOTE: Wires shown wrthout color codes are black.
RIGHTHEAD.LIGHTPage110-12
tl
tl
110-9
{}tl
tl
LEFT FRONTPARKING/TURNSIGNALLIGHTPages 110-2,1 10-7, and110-9
()
WIND.SHIELDWASHERMOTORPage 91PHOTA 3
ll
tl
REARwtNDowWASHERMOTORPage 92
tl
tt
c205
RIGHT FRONTPARKING/TURNStcNAL RADIATORLIGHT FANPaoes 110-2, MOTOR11d-7, and Page 63
'99-'00
.- Canada -l
i wnsxen i cnurse, FLUID ; CONTROL' LEVEL . ACTUATOR' SWITCH I paoe 34-2; Page 80-3 i eu6ro re'f-1 ' f-1
2Y2
c211
14-4
I'G201'Lv G2o2

PGM-FI (All '9e'98 Models except D16B5; '99-'00 D16y5 with M/T)
- D16Y7 Engine
' I pressure Ret€rence sensor ECT IAT primary I' i sensor input , voltag€ input sensor rnput sensor inDut HO2S inout I| ! praNKi ' OCc2) irpsr (Ecr)' ,tAr) ' l"no)si- I, r (Pr^Nn, \wtz) {rPs) iEcr} (AT) {PHozs)lL-------J----- --_-__J: Dis y j oro y ory D2 y D8y D7y
i.--1*.".ffi,"[
',[
]ilBLKryEL
l='i$d""-""---ffi][.[
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I ul,
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Iffiry I IH;
iw| irT_nHBRrfrnEBsi+lrplffii.;t
llffit!$il
i4[ffi- i lfiJs+t- lfj$l;?," rrrs.*r"se a r.ff
phu Laa
i;ftffii .]4 {_:{*;f,
i"# l i:l'lz"
: 13 V"*3J
iclll ! 'e""
2Y lY LrGRN
'll---o19;.?:.,,GFN/
it io-rb as ; BtK I GFN BLX I GFN.BLK ll cRN BLk
(Termi-rl, lt nals, '97 model: I 8-14)r - - - California Coupe, ll PHoro 46Calitornia Sedan LX I I,E, J8'98 model: all
r (suzl lPo2sHrc) I! Sensor inmary'| 6rl1d Ho2s \
a - heater \
t control I,L------- -----J'
23-8

POWERTRAINCONTFOLMODULE(PCM)PHOTO 86
FUSE 15AI'EiIIATOR3F S€txsoe?.5A
c10t
vtEw 28
See Pow€rDisltbution,page 10"5.
UNDER-DASHFUSE/RELAYBOXPhoTo 58
r
)
BLXAVTIT
IBLK]YEL
cl15
ffiru
fiE$'-i-fi,#*,ryffi#
liltilf
*-"';
.,"Ht-tll3::l L# ;FiiJshf# !,n$f*'"., I
Pca''' v/
$1-
{-r j,=1#:llx
vtEw 59
: (Pa2grTG)I Primary
I HO2S
{s!2sHTC) {PCS) (VSV) (2\4AS) : ap.ip-"0"'y evnF -pirge Evni'&mrot evrF biitass I l$lf"o.HO2S conlrol canister venl solenoid | :.^^... -| [&? heator solenoid shut valve vatue cdntrol I lil9P-uLE
i lffitsr conuot varv€ controt conaor ---
| !:3,T),.
LJ---------J'" Y F;o""L*ELKArrHr I v/El, so
24-7