ECU HONDA INTEGRA 1998 4.G Owners Manual

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Contents
How to Use This l\.4anual 1Circuit Schematics (see Circuit Index)Fuse/Relaylnformation 6ComponentLocation Photographs 201
Connector Cavity Numbers 202Connectorldentification 203
Ground-to-Components Index 6-6Wire Harness Routing 203Circuit ldentification lor ln-Line and Fuse Box Connectors
Circuit Index
Air conditionerAir delivery 61Blower controls 60Compressor controls 62Fans 63Anti-lock brake system (ABS) 44A/T gear position indicator 89Automatic transmission controls'98199 models 39'00 models 39-4Back-up lightsHatchback 110Sedan 110- 1Brake system indicator light
USA 71Canada 71-1Brake lightsHatchback 110-6Sedan 110-7Cargo area light (Hatchback) 114-3Ceiling light 114-2Charging system 22Cigarette lighter 155
Clock 154Condenser fan 63Console lights 114Cruise control 34Dash lights 1 14Daytime running lights 110-8Door open indicator 114-2Engine coolant temperature gauge 81Engine oil pressure indicator light 72Fog lights 110-14Front parking lights 110-11Front side marker lights 110-11Fuel gauge 81Fuse/relay boxUnder-dash 6Under-hood 6-3Under-hood ABS 6-5Gauges 81Glove box light 114Ground distribution 14Ground-to-Componentsindex 6-6Hatch open indicator '114-3
Hatch opener '134
Hazard warning lightsHatchback 'l l0-2Sedan 110-4Headlights 1'10-8Headlight switch 100HeaterAir delivery 61Blower controls 60Fanswith A,/C 63without A,/C 63-2Horns 40lgnilion key reminder 73lgnition system 20
204
lmmobilizer system ('00 model) 132lndicators 80Integrated control unit 70Interlock system'98199 models 138'00 models 138-1License plate lightsHatchback 110-12Sedan 110-13Lights-on reminder 73Low fuel indicator light 74l\,4aintenance reminder light 83l\iloonroof 122Odometer 81-1Power antenna 151Power distributionBattery to ignilion switch, fuses, and relays
Fuses to relays and components 10-2Power door locksHatchback '130
Sedan 130-2Power mirrorsHatchback 141Sedan 141-1Power windowsHatchback 120Sedan 120-2Programmed fuel injection system (PGM-Fl)'98199 models 23'00 models 24Radiator fanwith tuC 63without A,/C 63-2Rear parking lightsHatchback 110-12Sedan 110- 13Rear window defogger 64Seat belt reminder 73Security system 133Speedometer Il-1Spotlights 114-2Starting syslemAutomalictransmission 21l\.4anualtransmission 21-1Stereo sound system 150Supplemental restraint system (SRS) 47Tachometer 81- 1TaillightsHatchback 110-12Sedan 110-13Trailer lighting conneclor 118Trunk lid open indicator 114-3Trunk light (Sedan) 114-3Turn signal lightsHatchback 110-2Sedan 110-4Vehicle speed sensor (VSS) 33Wiper/washerFront 91Rear 92
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12Fg oAmerican Honda Motor Co., Inc. - All Rights Reserved Service Communications 275 pages

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)wer IJrstnDullon Scnemallcs -
Power Distribution schematics show how power is supplied from the positive battery terminal to
various circuits in the car. Refer to the Power Distribution section to get a more detailed picture
of how power is supplied to the circuit you're working on.
From Battery to lgnition Switch, Fuses, and Relays
lndividual circuit schematics begin with a fuse. The first half of Power Distribution, however,
shows the wiring "upstream" between the battery and the f uses.
!' - - - -f -ro-unE,-"*l - - - - - - -
?---? i,"-")il"i"v-g& o" ,
FUSE 15 Page 10'7 1
hTt""r--.r \
TrL--J I ruse re I ruse zi/ ru:rE ro a .v-E., tELECTRTCAL ) rc ) PowER sEAr !iOA6".'-'- I * I (REcuNrNG) Igs-r-qqrg! | l'* I{ELD) Ul'{rLJ-------
*-lll3l 'f t"' l*.r:::f ;1 ALTERNAToR
tL_Jii1:"":
Distribuiion,pago 1G7.
SLK
BATTERYSTARTERBLK
4----t
tl
STARTER SOLENOID
I
I
+ G1 (BODY)
r
I
I
I
FUSE 1O754
Sge PowerDistribltion,page 10-5.
FUSE 97.tat
,
l---r+J
See Power Se€ PowerDistribution. Distribution.page 10-5. pag€ 10-5.
_l_
Sa€ PowerDistribution,page 10-6.
Power Distribution Schematics
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How To Use This Manual
Symbols
Ground - "G"
This symbol means the end of
the wire is attached (grounded) Ito the car frame or to a metal Ipart connected to the f rame. \I orol
,
Each wire ground (G) ," -/numbered for reference.
Q,(Switches
These switches move
together; the broken straight
line between them means thev
are mechanically connected.
Other types of switches are
controlled by a coil or a solid
state circuit. Unless otherwise
noted, all switches are shown
in their normal (rest) position,
with power off .
This ground symbol (dot
and 3 lines) overlapping the
component means the housing
of the component is grounded
to the car f rame or to a metal
part connected to the f rame.
This symbol represents
the bus bar inside a ground
connector. The dots a
i"r*"""*nn"l,':" .,.L I I I
lermtnals connectto. -'--'-:t"'--------<
The ground symbol (large dot)
: Gsoo
is the connection between the
bus bar and metal (grounded)
part of the car.
Terminals - "T"
m
ffi
Solid-state
Fuses
This means power is supplied
when the ignition switch is in ON (ll).
Diodes
A rectifier diode works like a one
way valve. lt allows current to
flow only in the dlrection of the
arrow.
A Zener diode blocks reverse
currenl at normal voltages just like
a rectifier diode. At high voltages,
however, a Zener diode allows
current to flow in reverse.
Q,(
Each 'T" terminal (ring type)
is numbered for reference ano
location. A "T" terminal is
secured with a screw or bolt.
Shielding
This represents RFI
(Radio Frequency
Interf erence) shielding
around a wire. The
shielding is always
connected to ground.
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n
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L-_+i !",*
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Five-Step Troubleshooting
1. Verify The Complaint
Turn on all the components in the problem
circuit to check the accuracy of the customer
complaint. Note the symptoms. Do not begin
disassembly or testing until you have
narrowed down the Problem area.
2. Analyze The Schematic
Look up the schematlc for the problem
circuit. Determine how the circuit is
supposed to work by tracing the current
paths from the power source through the
circuit components to ground. Also, trace
circuits that share wiring with the problem
circuit. The names of circuits that share the
same fuse, ground, or switch, and so on' are
referred to in each circuit schematic. Try to
operate any shared circuits you didn't check
in steo 1. lf the shared circuits work, the
shared wiring is OK, and the cause must be
in the wiring used only by the problem
circuit. lf several circuits fail at the same
time, the fuse or ground is a likely cause.
Based on the symptoms and Your
understanding of the circuit's operation,
identify one or more possible causes.
3. lsolate The Problem By Testing The Circuit
Make circuit tests to check the diagnosis
you made in step 2. Keep in mind that a
logical, simple procedure is the key to
eff icient troubleshooting. Test for the most
likely cause of failure f irst. Try to make tests
at points that are easily accessible.
4. Fix The Problem
Once the specific problem is identified,
make the repair. Be sure to use proper tools
and safe procedures.
5. Make Sure The Circuit Works
Turn on all components in the repaired
circuit in all modes to make sure you've
fixed the entife problem. lf the problem was
a blown f use, be sure to test all of the
circuits on that {use. Make sure no new
problems turn up and the original problem
does not recur.
Test Equipment
CAUTION:
Most circuits include solid-state devices.
Test the voltages in these circuits only with
a 1o-megaohm or higher impedance digital
multimeter. Never use a test light or analog
meter on citcuits that contain solid-state
devices. Damage to the devices may result.
Test Light and DVOM
On circuits without solid-state devices, use a
test light to check for voltage. A test light is
made up of a 12 volt bulb with a pair of leads
attached. After grounding one lead, touch the
other lead to various points along the circuit
where voltage should be present. The bulb
will go on i{ there is voltage at the point being
tested. lf you need to know how much
voltage is present, use a digital
volVohmmeter (DVOM).
Selt-Powered Test Light and DVOM
Use a self-powered test light to check for
continuity. This tool is made up of a light bulb,
battery, and two leads. To test it, touch the
leads together: the light should go on.
Use a self-powered test light only on an
unoowered circuit. First, disconnect the
battery, or remove the fuse that feeds the
circuit you are working on. Select two points
in the circuit between which you want to
check continuity. Connect one lead ol the
self-powered test light to each point. lf there
is continuity, the test light's circuit will be
completed, and the light will go on.
lo
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SELF.POWERED TEST LIGHT

Fuse/Relay I nformation
- Under-hood Fuse/Relay Box (cont'd)
Fuse
NumberFuse NameAmpsPage
BATTERY
I INTERIOR LIGHT
I
1 7.5 110-7 I
I
Component or Circuil Protected
Power distribution
lgnition switch
DLC, Ceiling light, Power antenna motor (Hatchback),
Trunk/cargo area light
47
I Fl E/lvl
POWER WINDOW
I BACK UP (RADTO)
I
15 | 1 0-7 I PGM-FI main relay
Not used
Power window relay
Clock, ECM or PCM, Maintenance reminder unit, Stereo
radio cassette player, TCM ('98-'99 Models with A'/T)
7.5 |10-8
I HEADLIGHT| 40 | 10-8 | Headlights, Interlock system (A/T)
49i DR LOCK,
i suNRooF
10-9 i Moonroof
I
I RR DEFROSTER
+ B SMALL
I Rear window detogger relay
I Dash and console lights, License plate lights,
I Rear parking lights, Taillights
I HORN, STOP
i HAZARD
10-9 | Brake switch, Horn relay
i Gauge assembly ('00 Model), Hazard warning switch
40 | to t I Power door locks, Security system (option)
I HEATER MOTOR II t 0-1I Blower motor relay
20 I 10-1 ; A,/C compressor clutch relay, Condenser fan relay
i Radiator fan relay1 0-1
6-4

Power Distribution
- From Fuses to Relays and Components (cont'd)
FUSE'I9AACX UPLIGHTS
c440
FUSE 23
lSiS)FUSE 24Pfl RE-AYGutroof SEIAY)
i:tif,H-q:'PHOTO 6A
\
I
I
I
I
I16c55l 17
C801 (NotPffOtO 60 Used)
c439 11c438L'---------J
10
YELGFN
(Not 2Used)
|.
I
I
c66t
All exceptUSA RS
SECURITYSYSTEMCONNECTOR(oPTroN)
],ifij
ll
ll
BACK-UPLIGHTSWITCHPages110, 110 1,and '118
L
36
r
I
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A/T GEARPOSITIONSWITCHPages110, 110-1,and 118
10-4
sRsUNITPage 47
MOONROOFRELAYPage 122

Power Distribution
- From Fuses to Relays and Components (cont'd)
r'l'l
FUSE 48 \HEAruCHT \{la \
II-------Jc216c217
::]:I
-'..
'3
ir
:l
:!, I tFUSE20, : (BUNNTNG, I I u_qHrc)
'LJ___
. - All except USA RS - r
SECURITYSYSTEMCONNECTOR(oPTroN)
' BLU
,SECURITY SECURITY :.SYSTEM SYSTEM: CONNECTOR CONNECTOR ,
, (oPTroN) (oPTtoN) :I PHA|A 124 PHA|A 48 ,
UNDER-DASHFUSE/RELAYBOX
il
:l
i_J_
li:
tl
i [--., COMBI.. NATION
: LIGHT; swrTcF, Page 101
-- 18JF#
T
tn"r,o"" I
i
'*9,'ot,
"*r,o"" I
rrr
1l
tl
STEERINGLOCKPage 138('98- 99) or138,1 f00)
--'- Nr --
c452 wHr/BLU
'00 Model
: 16 r--
WHT/BLU
I(RS 7)
WHT/ALU
I Y€L
' 2 lt c415
i i--t't I
:l I
i olwrme, RUNNING, LIGHTSI CONTROL
: uNrT, Page 1'10-9
:. - . Canada
'98-'99
N,4odels
BLU
4 A C566
lt
ll
STEREO
Page
4 A C56(
lt
ll
STEREORADIO/CASSETTEPLAYERPaqe 150
ztlr7l!Ntl
ittaru f wnlalu I wrrier-u I
o,[ "uu' ,,, .!, "ou, ,o .!, "oo,r--1r--.|r--1
trtttl
tttttlL--J t--J t--JCLOCK POWERTRAIN ENGINEPage 154 or ENGINE CONTROLCONTROL MODULEMOOULE (ECM)(PCM or ECM) Paqe 23Pages 24 pr6ro ,,and 39-4PHO|O 14A
1 A C568
tl
tl
MAINTENANCEREMINDERUNITPage 83
10-8

- Automatic Transmission
NorE: For cars equipped with optional security system, see security system, page 13g-3 tor startrngsystem circuit schematic.
Starting System
c216
FUSE 42tGt
UNDER-HOODFUSE/RELAYBOX
See PowerDistributian,page 10.
liu.) 3:i:it1-i*!
i!'''{=o1ili"' i i!i (=r.f(',ii i I
!i rfi,l.l i I
!L----J------j Ir'---BLK;HrT---------=---r
".o"rnrfi F,i% u.,
'to A co' s
3 V C432
BLr!,Y/Ht ll PHoro 70
04-;' s
\z
1l
t:
t,
t;
t:
t:
t,N^/.
A,/TGEARPOSITIONswtTcH
ALKFEO
't1
EIIVRED
BLKFED
t2
I BLK/RED
'4
BLI(FED
178LK/BEO'I
BLKII/HT
FUSE 41BATTEiYr00A
To
c413
See PowetDistribution,page 10.--i--;-JT1
BATTERY
c444
{Not Used)
All exceplUSA FS
c301
c126PHOTO 36c4404 ^, PHO|O 62
STARTERrrF-----1
! i rur..r !| snnrea sour- || 1 '* |
! Ir-'Lg"' i
llttl
llr | |
llL-J Ir I INTEGRATEo I! I CONTROL I
I luNrr I
tIbEt:_J
UNDER-DASHFUSE/RELAYBOX
WHT/ALK
--- usA ---
.I ELECTBTCALI LOADI DETECTOR
i (ELD) uNrr. PHOIO 23I
21
lGlSee PGM-FI, paqe 23.1('98.'99) or 24-1I OO).

- Manual Transmission
NOTE: For cars equipped with optional security system, see security system, page 133-3 for starting
system circuit schematic.
c432
FUSE 42tGl
c216
r
I
I
I
I
I
I
I
I
I
]
UNDER.HOODFUSE/RELAYBOX
ELECTRICALloAoDETECTOR(ELD) UN|T
START(10
c432
.Joil0t)
BLKWHT
1
BLK/IVHT
(o) ,t-,>
0)
,i
I
l
Ia
I
I
I
I
BLKA''HT II--2 A cqqz
"4
".u,".0^ tr-
- -----
t I coee
Hifr*',;*-"J
":-r
"*'
: See Ground
I Rl"i:b,*?"
""1;
' PHOIO 56
STARTERCUTRELAY
See PowerDistribution,page 10.
T1PHO|Q22
BLK/REO
BLK/BEO
a=z
lt
lta c444
Used)
c444All exceptUSA RS
See PolYerDistribution,page 10.
BLK/REO
1
ALK/WHI
c301
c126PHOTA 36c440
BATTERYSTARTERrrF-----1
! { H:.i,r'",""^. I
li ?.ea I
!l';Lg" i
|r | |
ill l lllL-J I! I INTEGRATED ]| | coNrRoL I
Ll'l,l't--i
UNDER.DASHFUSE/RELAYBOX
See PGM'Fl, page 23-l('98-99) or 24-1 ('00).
t2 A Clos
-a- G1
21-1

FUSE 52HOBI|, STOP20A
c216
UNDER-HOODFUSE/RELAYBOXSee PowerDistribution,page 10-9.
See Powe.Distribution,page 10-9.
WHT/GRN
C'osed withl--f uiiiipna-a depressed.
c418(Termlnals 5-7)
WHT/GFN
-l -..1113i::l, ? #:f"*".u'o?I ",
REEL
SeeHOrns
4 Y c4s1BLU/GFN II.-l----
i ll ".u o"n ! 9EcuRIJY-SYSTEM Att except,, ?--1f.^ cooL.tNEcroR usA Rs
1**9 it*'.__;il__.
t=^----- STEERTNGag I WHEEL
diiiinlor- |SET/RESUME IswrrcH i
I
(cont'd)
c431BRAKEswtTcH
I '-l--P'---e"
l L_ffi___-l3 Y c431 .9"-f------9*-t "or,-."1""L.------"0,,
i@ @ iF;5""
f-----Y (Terminals 1s-17) L--f.--------L-Jt I e/,o,o5, 1f ------4c2
o"n*",! $
'*""Tl----*irt.ouu
""'-
! seeABs. PGM-FI. 'f o [ilb'i5o'
I Brake Lghls. Automatic rr onr neo I r-r onr er-x I
. L _ _i:Tl1T:: - - - - - -- - -'-l- - - - - - - rI slr
i-#,[?=== input - input lPtroto.t
l'L------ ------J
34-1