1998 HONDA INTEGRA check engine light

Charging System
Troubleshooting
It the charging system light does not come on or does not go off, or the battery is dead or low, test the following items in
the order listed below:
1. Battery
2. Charging system light
3. Voltage
4. Alternator control system
5. Alternator/regulator
Charging System Light Test
ALTERNATOR'P CONNECTORIUSAI
IGIBLK/YEL)
Wire side offemale terminals
Wire side offemale terminals
ALTERNATOR 3PCONNECTOR lCanadal
Charging System Light Check:Make sure the charging systemlight comes on.
Ch€ck tor a blown No. 15 (7.5 A)
tuse and . blown charging sys-
tem light bulb. ll the fuse andbulb are OK, .eptir tho open inlhe WHT/BLU or BLK/YEL wire.
Does the charging systemlight come on?
Ch.rging System Light Check(cont'd):
Start the engine.
Pertorm the Ahernator/RegulstolTest (s€. prge 23-101,Does the charging systemlight go off?
Voltago Check:Measure the voltage at the No. 1
lNo. 2l terminal of the 4P [3P]connector with tho ignition switchoN {lr).
Repair tho open in ih€ 8LK/YELwir6 betweon the alte]nator andundor-dash lure/reley box.
I4
L-*
23-102

Gharging System
Troubleshooting
Ahcrn.tor Control Swtom T.rt (USA)
NOTE: Betore testing, check proper operation of the ELD by confirming with the MIL (s€e section 11).
CAUTION: Ba 3urc to ut! | vollmatalwith hr plu! tarmlnal connactad to bat-tary plua and ita mlnua talmlnal to lha4P connactor tarrninal No. 2.
ALTENNATORilP COiINECTOR
cIWHT/GBN}
ALTERNATOR.P CONI{ECTOB
Wire sido olt€m6le t€rminal6
ECM CONI{ECTOR A l:t2F)
BATTERY
Ch.ck tor . .hort In th. clrcuit(ALTC ltn.lr1. Disconnect the 4P connoctorIrom th6 altemator.2. Start tho engine, and turn thoh6adlights (high beam) ON.3. Moasur€ voltago botwoen th64P conn€ctor t6rminal No. 2and the positivo t€rminsl oltho batterv.
16 thor6 1 V or less?
Chrck for .n oD.n In th. wllrIALTC lln.):1. turn the headlight and igni-tion switch OFF.2. Disconnect th6 A (32P) con-noctor from the ECM.3. Ch6ck for continuity b6tw6entho ECM connoctor A (32P)
t€rminal No, 19 and alternator4P connoctor torminal No. 2.
Rrp.h op.n In th. wh. brlw..nth. rltarn oi.nd ECM.
Ch.ct for rhort in th. wire (ALTC
lin.l:'1. Turn the headlight and ignition switch OFF.2. Disconn€ct the A {32P} con-n6ctor from tho ECM.3. Check for conlinuity b€twoenths ECM connector A (32P)
terminal No. 19 8nd bodyground.
Slbrlltut. ! tnown-good ECM..nd rach.ck. It Drorcrlb.d volt-rgr ir now avalldla, raphce lhaorigin.l Ecilt.
Rap.ir 3hort in lha wira bstwaanth. .h.rnator ard ECI\|.
I23{5GtI|l0tl
72151aItIt136zla2a
a26n,/,V
Wir€ side offem6le t€rminals(l
ALTC(wl{T/GRNI
cIWHT/GBNI
Wire 3id€ offemal6 t€rminelg34
ECM CONNECTON A I32P}
t23a50t9t0tt
12t510l1Itt9mz2a2a
62621
ALTCIWHT/GRNI()
23-104
b-.

Integrated Control Unit
Circuit Diagram
Description
An integrated control unit, located in lhe left kick panel, integrates the lunctions of the key-in/seat belt r€minder , side
marker light llasher, wiper/washer, lights-on reminder, rear window delogger timer, brake system light bulb check, and
engine oil pressure indicator flasher circuits.
NOTE: Different wires with the same color have been given a nu mber suflix to distinguish them (for example,
GRN/RED I and GRN/RED' are not the same).
REAR WINDOWDEFOGGERRELAYREAF WINDOWDEFOGGENIND CATORL GHT
f-7
IIBLU/YEL
WHT/ BLK
WHT/ REO
+WHT
WNDSHIELDWIPERiWASHER SWITCH
INT OFF/INT
f7 f7
tltlYEUBLU 8LU/GRN
BLUMHT
J
wtN0sHr€10WIPERMOTOR
UNDER.DASH FUSARETAY BOX
F rmecnlleo counoL ultr
YEUBLU
rYEUBLU
YEUREO YEUREO
tl
IYEURED
LOWENGINEOIIPRESSUREINOICATOBLIGHT
; WINDSHIELD' WIPERMASHERI swlTcH
tf7IVtlYEL
J
FEARwtN00wOEFOGGERSWITCH
WHTIBLU
J
VOTTAGEREGULATOR(ln allernatol)
BLK
G441
ENGINEolLPRESSUREswrTcH
UNDER-NOOO FUSE/RELAY BOX
1.6
:6
t;t-L
i
"'i'- 'i*-
|
I Il
I vi: WINDSHIELO II WASHEB I
L__ "oto: _ __l(*)
n
s
s
,]
23-152
(*) :Wilh combined washer-wiper operalion

Integrated Control Unit
lnput Test (cont'd)
YEL/BLU
View from wire side
'With combined washer-wiper operation
Engine Oil Pressure Indicator Flasher System:
Wire/
No. TerminalTest condition
Key-in/Seat Belt Reminder System:
No. WileTest condition
Testi Desired result
Test: Desired result
Possible cause if result is not obtainsd
Possible cause if fesult is not obtained
*BLK/GRN
1Engine runningCheck for voltage to ground:
There should be battery voltage.
. Faulty charging system. An open in the wire
2YEL/RED
lgnition switch OFFCheck for continuity to ground:
There should be continuity.
. Faulty engine oil pressure switch. An open in the wire
lgnition switch ON (ll)Check indicator light. It the light
does not come on, attach the
YEL/RED terminal to groundl
The light should come on as the
ignition switch is turned ON.
. Blown bulb. An open in the wire
Start the engine.Check tor voltage to ground:
There should be battery voltage
lnsufticient oil
lmproper lubrication
Faulty engine oil pressure switch
1GRN/BLUDriver's door openCheck for continuity to ground:
There should be continuity.
. Faulty driver's door switch. An open in the wire
2
LT GRN/
RED
Front passenger's door
swrlcn open
NOTE: Before testing,
remove No. 43 {7.5 A)
fuse from the under-
hood fuse/relay box.
Check for continuity to ground:
There should be continuity.
. Faulty front passenger's door switch'An open in the wire
3LT BLU
lgnition key inserted
into the ignition switch
Check for voltage to ground:
There should be 1 V or less.
Faulty ignition key switch
Poor ground (G2O1, G401 l
An open in the wire
4RED/BLU
lgnition switch ON (lll
and driver's seat belt
unbuckled
Check for voltage to ground:
There should be 1 V or less.
Faulty seat belt switch
Poor ground (G551l
An open in the wire
NOTE: Refer to page 23-133 for the seat belt switch test.

Cruise Control
- Control Unit InputTest(cont'dl
IBLKUnder all conditionsCheck for continuity to ground:
There should be continuity.
. Poor ground (G20l, G401). An open in the wire
2BLK/YEL
lgnition switch ON {ll}Check for voltage to ground:
There should be battery voltage.
. Blown No. l4 (7.5 Alfuse in the
under-dash fuse/relay box. An open in the wire
3LT GRNlgnition switch ON (ll)
and main switch ON
Check for voltage to ground:
There should be battery voltage.
. Faulty main swjtch. An open in the wire
GRY
lgnition switch ON (ll),
main switch ON and
brake pedal pushed,
then released
Check for voltage to ground:
There should be O V with the
pedal pushed and battery
voltage with the pedal released.
. Faulty brake switch. An open in the wire
5GRN/WHT
Brake pedal pushed,
then released
Check for voltage to ground:
There should be battery voltage
with the pedal pushed, and 0 V
with the pedal released.
Blown No. 52 (20 A)fuse in the
under-hood fuse/relay box
Faulty brake switch
An open in the wire
6RED/BLU
lgnition switch ON (ll)Connect to ground: lndicator
light in the gauge assembly
comes on.
Blown bulb
Blown No. 25 (7.5 A)fuse in the
under-dash fuse/relay box
Faulty dimming circuit in the gauge
assembly
An open in the wire
7LT GRN/
BLK
RESUME button
pushed
Check tor voltage to ground:
There should be battery voltage.
Faulty SET/RESUME switch
Faulty cable reel
An open in the wire8LT GRN/
RED
SET button pushed
IPNK
MT/: Clutch pedal
released
A/Tr Shift lever in [2l,
[Dl]. o, [o'l
-
Check for continuity to ground:
There should be continuity.
NOTE: There should be no con-
tinuity when the clutch pedal is
depressed or when the shift
lever is in other positions.
Faulty or misadjusted clutch switch(M/T)
Faulty A/T gear position switch(A/T)
Poor ground (G201,G401)
An open in the wire
't0BLUStart the engine.Check lor voltage to ground:
There should be voltage.
. Faulty ignition system or ECM. An open in the wire
't1ORN
lgnition switch ON (ll)
and main switch ON;
raase the front of the
car, rotate one wheel
slowly.
Check for voltage between the
ORN @ and BLK O terminals:
There should be 0- about
5 V-O- about 5 V repeatedly.
. Faulty vehicle speed sensor {VSS). An open in the wire
BRN/WHTConnect battery power
to the BRN/WHT
terminal and ground to
the BRN/BLK terminal.
Check the sound of the actuator
motor: You should hear the mo-
tor running smoothly.
. Faulty actuator. An open in the wire
BRNi BLK
Connect battery power
to the BRN/RED
Iermrnal.
Check the operation of the mag-
netic clutch: Clutch should click
and output link should be locked.
Faulty actuator
An open in the wire
Poor ground (G30'l)
No. Wire Test conditionTest: Desiled result Possible cause il lesult is not obtained
' 4 I BRN/RED
{
{
23-258
-L

Circuit ldentification for In'Line and Fuse Box Connectors
tuse the chart (on page 204, sample below) to help diagnose multiple symptoms in separate
circuits which could be caused by a single problem in a connect,oishared by those circuits'
Here's how that chart could help you find such a problem:
1. Pick one of the multiple symptoms and look up the schematic for that circuit'
2. Make a list of all in-lrne and fuse box connectors in that schematic (include page numbers).
3. Then, in the chart, look up each connector on your list to see if circuits related to the other
symptoms run through one of them. lf they do, inspect that connector for the problem.
Example: The horn, A,/C, and the right headlight don't work. List all in-line and fuse box
connectors in the horn circuit and then check the chart (sample below). You find that C211 is
common to the A,/C circuit and the headlight circuit, so you inspect c211 and find the problem:
bent terminals.
)Connector
(6 or more
cavities)
Numbel of
Cavities - Color
1O-GRY
I 12-GRY
I
Wire
Harnesses
I Main/ | ComP er 'ror c.ntrols,
I Dashboard I
Circuits
Ant!lock brake system (ABS), Cruise control,
Programmed {uel injection system (PGM-FD
!ngrnei
lvlain
lgnition system
Antilock brake system (ABS), BIower controls, Fans,
Wiper/washer
lgnition system, Starting system
Blower controls, Compressor controls, Headlights'
Horns, Vehicle speed sensor (VSS), Wiper/washer
Programmed fuel injection system (PGM-Fl)'
Starting system
Engine/ |Main I
)

How To Use This Manual
Test Equipment
lf, in addition, you need to know exactly how
much resistance there is between two ooints.
use a digital volVohmmeter (DVOM).
In the "oHMS" range, the DVOM will show
resistance between two points along a circuit.
Low resistance means good continuity.
Diodes and solid-state devices in a circuit can
make a DVOM give a false reading. To check
a reading, reverse the leads, and take a
second reading. lf the readings differ, the
component is affecting the measurement.
Jumper Wire
Use a jumper wire to bypass an open circuit.
A jumper wire is made up of an in-line f use
holder connected to a set of test leads. lt
should have a tive ampere fuse. Never
connect a jumper wire across a short circuit.
The direct battery short will blow the fuse.
Short Finder (Short Circuit Locater)
Shoft linders are available to locate shorts to
ground. The short finder creates a pulsing
magnetic field in the shorted circuit which you
can follow to the location of the short. lts use
is explained on page 15.
SHORT FINDER
To order any test equipment shown above,
contact your local tool supplier. For a list of
suppliers and tool numbers, refer to Acura
Required Special Tools and Equipment
Service Bulletin.
Troubleshooting Precautions
Before Troubleshooting
1. Check the main fuse and the fuse box.
2. Check the battery for damage. state of
charge, and clean and tight connections.
CAUTION:
. Do not quick-charge a battery unless
the battery ground cable has been
disconnected, or you will damage the
alternator diodes.
. Do not attempt to crank the engine with
the ground cable disconnected or you
will severely damage the wiring.
While You're Working
1. Make sure connectors are clean, and have
no loose terminals or receotacles.
2. Make sure multiple terminal connectors are
packed with dielectric (silicone) grease.
Part Number: 08798-9001 .
Pack with dielectric (silicone) grease
When connecting a connector, push it until it
clicks into olace.
Do not pull on the wires when
disconnecting a connector. Pull
only on the connector housings.
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 circuits that contain solid-state
devices. Damage to the devices
may result.
Qr(
l"(

Ground-to-Components I ndex
NOTE: All ground wires are BLK unless otherwise noted.
GroundPageComponents or Circuit Grounded
Battery (BLIVYEL)
--t'I Valve cover (BRN)
G101t.+
and
14-1
Daia link connector (BRN/BLK), Engine or powertrain controt module (pct and pG2
are BLK; LG1 and LG2 are BRN/BLR, IAB controt solenoid valve (GS-B),
lmmobilizer receiver unit ('00 Model) (BRN/BLR, PGM-Ft main retay, Radiator fan
switch, Transmission control module ('98.99 Models with MD (2 BRN/BLK wires),
Vehicle speed sensor, WEC pressure switch (GS-R, Type-R)
Shielding between the ECM or PCM and these components (all have BRAIDED wires):
CKF sensor, Primary and secondary heated oxygen sensors, Knock sensor (GS-R,
Type-R), TDC/CKP/CYP sensor
Shielding between the TCM ('98-'99 Models) or PCM ('00 Model) and these components(all have BRAIDED wires): Countershaft speed sensor, Mainshaft speed sensor
G1s1 ii Condenser fan motor
Brake fluid level switch, Cruise control actuator, Left front parking/turn signal light, Left
front side marker light, Left headlight, Power steering pressure switch (USA), Rear
window washer motor (Hatchback), Windshield washer motor, Windshield wiper motor
14-3
Blower motor relay, ELD unit, Badiator fan motor, Right front parking/turn signal light,
Right front side marker light, Right headlight.....plus everything grounded through G401
ABS fail-safe relay, ABS pump motor
G40114-4
ano
l4-c
A,/T gear position switch, Cigarette lighter, Clutch switch (M,/T), Ctock, Ctutch interlock
switch (MfD, Combination wiper switch (2 wires), Cruise control main switch, Cruise
control unit, Dash lights brightness controller, Data link connector, Daytime running
lights control unit (Canada), Front passenger's door key cylinder switch, Frontpassenger's door lock switch, Gauge assembly (2 wires), Glove box light, Heater
control panel, Heater tan switch, lgnition key switch, Integrated control unit, Interlock
control unit (AfI), Maintenance reminder unit, Mode control motor, Moonroof relay,
Moonroof switch, Parking pin switch (AfD, Power window relay, Rear window defogger
switch, Service check connector, Turn signal/hazard relay.....plus everything grounded
throuoh G201
Driver's door key cylinder switch, Driver's door lock actuator, Drivels door lock switch,Driver's seat belt switch, Fuel pump (BLI(/WHT), Fuel tank unit (BLI(/WHT), power doorlock control unit, Power mirror switch, Power window master switch (2 wires)
Hatch key cylinder switch, Hatch latch switch, Hatch opener actuator, Hatch ooener
switch, Left and right back-up lights, Left and right brake light/taillights, Lett and right
rear parking lights, Left and right rear turn signal lights, License plate lights, power
antenna motor, Trailer lighting connector..... plus everything grounded through G751
6-6
'14-8G503
(Sedan)
High mount brake light, Left and right back-up lights, Lett and right inner brake tighv
taillights, Left and right outer brake light/taittights, Left and right rear parking tights, Leftand right rear turn signal lights, License plate lights, Rear window detogger, Trailer
lighting connector, Trunk latch switch