engine connectors HONDA INTEGRA 1994 4.G Workshop Manual

J: GLOVE BOX INFORMATIOf{
AIBBAG INFORMANO
SUPPLEMENTAL RESTiAINT SYSTEM (SRS)
. THE SRS MUST BE INSPECTED TEN YEARS AFTER IT
IS INSTALLED. TI{E DATE OF INSTALLATION IS SHOWN
ON THE CERTTFICATION PLATE, LOCATED ON THE
DRIVER'S DOOR JAMB.
. DIAGNOSTIC CHECKS AND REPLACEMENT OF SNS
COMPONENTS MUST BE DONE BY AN AUTHORIZED
DEALER
. SEE YOUR OWNER'S MANUAL FOR AODITIONAL SRS
INFORMATION.
K: FRONT SEAT PASSENGER INFLATOR WARNING TAG
A WARNING
ACCIDENTAL AIRBAG DEPLOYMENT CAN SERIOUSLY
HURT OR KILL YOU.
INSTALL THE RED SERVICE CONNECTOR WHEN THE IN-
FLATOR HARNESS IS DISCONNECTED
L: FRONT SEAT PASSENGER MODULE DANGER
A DANGER
EXPLOSIVE/FLAMMABLE
CONTACT WITH ACID, WATER OR HEAVY METALS SUCH
AS COPPER. LEAD OR MERCURY MAY PRODUCE HARM'
FUL AND IRRITATING GASES OR EXPLOSIVE COM.
POUNDS.
STORGE TEMPERATURES MUST NOT EXCEED 2OOOF
tlOO"CI. FOB PROPER HANDLIING, STORAG€ AND DIS-
POSAL PROCEDURES REF€B TO THE SERVICE MANUAL,
SBS SUPPLEMENT.
POTSON
CONTAI'\'S POISONOUS SODIUM AZIOE AND POTASSIUM
NITRATE.
FIRST AID
IF CONTENTS ARE SWALLOWED, INDUCE VOMITING.
FOR EYE CONTACT, FLUSH EYES WITH WATER FOR 15
MINUTES.
IF GASES (FROM ACID OR WATER CONTACT) ARE IN.
HALED, SEEK FRESH AIR. IN EVERY CASE. GET PROMPT
MEDICAL ATTENTION.
KEEP OUT OF REACI.I OF CHILDREN.
A' WARNING
THE AIRBAG INFLATOR IS EXPLOSIVE AND. IF ACCIDEN-
TALLY DEPLOYEO, CAN SERIOUSLY HURT OR KILL YOU.
. DO NOT USE ELECTRICAL TEST EOUIPMENT OR PROB.
ING DEVICES.
THEY CAN CAUSE ACCIOENTAL DEPLOYMENT.
. NO SERVICEAALE PABTS INSIDE. OO NOT OISAS-
SEMBLE.
. PLACE AIRBAG UPFIGHT WHEN REMOVED.
. FOLLOW SERVICE MANUAL INSTRUCTIONS
CAREFULLY.
fi{lHfiFe*% _
1-7
M: AIRBAG LABEL
AIRBAG
N: SRS WARNING IENGINE HOODI
SUPPLEMENTAL RESTRAINT SYSTEM (SBSI
THIS VEHICLE IS EOUIPPED WITH DRIVER SIDE AIRBAG.
ALL SRS ELECTRICAL WIRING AND CONNECTORS ARE
COLORED YELLOW.
TAMPERING WITH, DISCONNECTING OR USING ELECTRI-
CAL TEST EOUIPMENT ON TI{E SRS WIRING CAN MAKE
THE SYSTEM INOPERATIVE OB CAUSE ACCIOENTAL FIR'
ING OF THE INFLATOR.
A. WANING
THE AIRBAG INFLATOR IS EXPLOSIVE AND, IF ACCIDEN-
TALLY DEPLOYED, CAf{ SERIOUSLY HURT YOU'
FOLLOW SERVICE MANUAL INSTRUCTIONS CAREFULLY.
SUPPLEMENTAL RESTRAINT SYSTEM {SRSI
THIS VEI{ICLE IS EOUIPPED WITH DRIVER ANO FRONT
SEAT PASSENGER AIRBAGS.
ALL SRS ELECTRICAL WIRING AND CONNECTORS ARE
COLORED YELLOW.
TAMPENING WITI{, DISCONNECTING OR USI G ELECTRI'
CAL TEST EOUIPMENT ON THE SRS WIRING CAN MAKE
THE SYSTEM INOPERATIVE OR CAUSE ACCIDENTAL FIB'
ING OF THE INFLATOB.
A WABNING
THE AIRBAG INFLATOR IS EXPLOSIVE AI{O, IF ACCIDEN-
TALI-Y DEPLOYED, CAN SEBIOUSLY HURT YOU'
FOLLOW SERVTCE MANUAL INSTRUCTIONS CAREFULLY.
N: SRS WARNING IENGINE HOODIi
'This vorsion
passonger's
ol tho labol is u36d in cs.t with a front soat
airbag.
{cont'd)

1O. Remove the brake booster vacuum hose and fuel
return hose.
6 x 1.O mm11 N.m {1.1 kgl'm,8.O rbt.ltl
BRAKE BOOSTERVACUUM HOSE
't 1.
BETURN HOSE
Remove the throttle cable by loosening the locknut.
then slip the cable end out of the accelerator linkage.
NOTE:
a Take care not to bend the cable when removing
it. Always replace any kinked cable with a new
one,
a Adjust the throttle cable when installing (see sec-
tion 1 1).
LOCKNUT
AOJUSTING NUT
5-5
't2.Remove the engine wire harness connectors, termi-
nal and clamps on the left side ot engine com-
oartment.
6 x 1.0 mm9.8 N.m {1 .O kgf.m,7.2 tbt.ftl
ENGINE WIREHABNESS
13. Remove the cruise control actualor.
CRUISE CONTROLACTUATOR
8 x 1.25 mm24 N.m (2,4 kgl.m,17 lbf.Irl

Remove the fuel return hose and positive crankcase
ventilation (PCV) hose.
Remove the brake booster vacuum hose, water
bypass hose and vacuum hose.
ERAKE BOOSTERVACUUM HOSE
HOSE
VACUUM HOSE
HOSE
9.
10.
Remove the throttle cable.
Remove the throttle control cable (automatic trans-
mission only).
NOTE:
. Take care not to bend the cable when removing
it. Always replace any kinked cable with a new
one.
. Adjust the throttle cable and throttle control
cable when installing (see section 11 and 14).
THROTTLE CONTROLCABLE
Remove the engine wire harness connectors and
wire harness clamps trom the cylinder head and the
intake manifold.
Four fuel injector connectors
Intake air temperature (lAT) sensor connector
Engine coolant temperature (ECT) sensor con-
necror
TDC/CKP/CYP sensor connector
lgnition coil connector
ECT gauge sending unit connector
Throttle position (TP) sensor connector
Manifold absolute Dressure (MAP) sensor con-
nector
ldle air control (lAC) valve connector
EVAP purge control solenoid valve connector
11.
a
a
a
a
a
a
a
a
a
(cont'dl
ATI'USTING
6-17

ll.Remove the engine wire harness connectors and
wi.e ha.ness clamps from the cylinder head and the
intake manitold.
Four fuel injector connectors
Intake air tempe.ature {lAT) sensor connector
Engine coolant temperature (ECT) sensor con-
nector
TDC/CKP/CYP sensor connector
lgnition coil conn€ctor
ECT gauge sending unit connector
Throttle position (TP) sensor connector
VTEC solenoid valve connector
VTEC Dressure switch connector
Manifold absolute pressure (MAP) sensor con-
nector
ldle air control {lAC) sensor connector
EVAP purge controlsol€noid valvo connector
Intake air bypass {lABl control solenoid valve
conneclor
a
o
a
o
a
a
a
a
a
a
a
a
a
12.
13.
Remove the spsrk plug caps and distributor from
the cylinder head.
Remove the upper radiator hose, heat€r hose and
water bypass hose.
WATER BYPASS
HOSE
6r1.0mm9.8 N.m (1.0 kgt m,1.2 tbtftl
14. Remove the sDlash shield.
Remove the engine ground cable.
Romovo the adjusting bolt and mounting bolts, then
remove the power steering (P/S) pump belt and P/Spump.
. Do not disconnect the P/S hoses.
(cont'dl
15.
6x1.0mm9.8 N.m 11.0 kgl.m,7.2 tbt.ttl
6-57
,l

Radiator
Replacement
1.Drain the engine coolant.
Remove the upper and lower radiator hoses, and ATF
cooter noses.
Disconnect the fan motor connectors.
Remove the radiator upper brackets, then pull up the
radiator.
5. Remove the fan shroud assemblies and other parts
from radiato..
lnstall the radiator in the reverse order of removal:
NOTE:
a Set the upper and lower cushions securely.
a Fill the radiator and bleed the air.4.
UPPER BRACKETAND CUSHTOl{
RADIATOR CAP
t
e
6 x l.O mm9.8 N.m (1.O kgt.m,7.2 rbf.ft)
6 x 1.0 mm9.8 il.m 11.O kgt'm,7.2 lbr.ftl
FAN MOTOR
CUSHION
SHROUDO-RINGReplace.
6 x 1.0 mm9.8 N.m ('l.O kgl.m,7.2 tbl.ttl
DRAIN PLUG
LOWER RADIATORHOSE

Fuel and Emissions
Spocial Tools ................ 1 1-2
Compon€nt Location
lndex ................. ...... 11-3
System Description
Vacuum Connectiona .......,.................... 1 1 -8
Efectrical Connections ....,.,.,......,...,,.....,'11-12
Syst€m Connectors ...,...,.................-.--. 11-2O
T.oubloshooting
Troubleshooting Guido .......................... 1 1-32
Self -diagnostic Procedures .,..,............... 1 1 -34
How to Road Flowcharts ...................,... 11-39
PGM-Fl System
Systom Description .............................. 1 l-4O
Troubleshooting Flowcharts
Engine Control Moduls ............... ........... 1 1 -42
Heated Oxygon Sensor ......,.................. 1 1-46
Heated Oxyg€n Sonsol Heatel .....,......... 1 1 -47
Fuel Supply System ..............-............... 1 1-50
Manitold Absolute Pressure
Ssnsor ............................................ 1 1-52
Top D6ad Cente./Crankshatr
Position/Cylindor Position sonsor ........ 1 1 -56
Engine Coolant Tempsrature Sonsor ....... 11-58
Throttlo Position Sonsor ........,..,,........... 1 1-60
Intake Air Temperaturs Sensor ............... 11-62
Baromet c Prsssuro Sensor ......,...,...,..,. 11-64
lgnition Output Signal ........................... 1 1 -66
Vehicle Spe€d Sensor ........................... 1 1 -68
Electdcal Load Dotector ....,...,..........,.... 1 1 -7O
Knock Sensor [818C1 engine] ............... 11-74
A/T Fl Signal A/B ................................. 1 1-76
ldle Contlol System
System Troubleshooting Guide .................. 1 1 -78
Systom Description ........ 11-79
Troubloshooting Flowchans
ldl€ Ail Control Valve ........................... 1 1 -82
Ail Conditioning Signal ......................... 1 1 -84
Altemator FR Signal ............................. 1 1 -86
Automatic Transaxle (A/T) Gear
Position Signal ......... 11-88
Brake Switch Signal ............................. 1 1 -9O
Startel Switch Signal ............................ 11-92
Power Steering Pressure Switch Signal ... 11-93
Fast ldle Thermo Valve ...................,......... 1 1 -94
ldls Speed S€tting .................................... 1 1 -95
Fuel Supply System
Systam Tloubloshooting Guid. .................. 1 1 -97
Fuol Linos ...................... 1'l -98
System Description ........ 11-100
Fuol Prassure ................. 11-100
Fu6l Ini6ctors ................. 11-102
Fuel Pressure Ragulato. .,. 11-106
Fuel Filter ...................... 11-108
Fual Pump ..................... 11-109
PGM-Fl Main F6lay ................................... 1 1"1 1 1
Fuel Tank ...................... t 1-114
Intake Air System
System Troubloshooting Guido .................. 1 1 -1 1 5
Systom Dascription ........ 11-116
Air Clean€r .................... 11-117
Throttls Cable ................'11-118
Throttl8 Body ................ 11-120
lntake Air Bypass Cont.ol Systsm
[B18Cl enginal .,......... 11-123
Intake Manilold [B1881 onginol ................. 11-128
Emission Control System
Systsm Troubleshooting Guido .................. 1 1 -1 29
Systam Doscription ........ 11-130
Tailpips Emission ........... 11-130
Thrae Way Catalytic Convortor ...,...,........., 11-131
Positiva CrankcaEo V6ntilation Systcm .,....., 11-134
Evaporativo Emission Contro|,..,..,.,.,,.,,..,.., 1 1-135

System Description
System Connectors IEngine Compartmentl
{818C1 onginol
ENGINEWIRE HARNESS
t3
c132
c131
UNDER,HOOOFUSE/RELAYaox
c102c222
ct 04c220
MAllrlWIREHARI{ESS
o
11-20

System Description
System Connectors [Engine Compartment] (cont'd)
c 120{81881 sngino}
(B18Cl onginol
11-22

System Description
System Connectors [Dash and Floor]
PGM-FI MAINRELAY
C1I44 UNDEN-OASHFUSE/REALYBOX
ENGINECOMPARTMENTWIRE
DASHBOARO WIREHARNESS
MAINWIREHARI{ESS
REARWIREHARNESS
11-24

How to Read Flowcharts
A flowchrrt is dasigned to be us€d fiom start to final repair. lt's like a map showing you the shortest distanco. But be-
ware: if you go off tho "map" anywhere but a "stop" symbol, you can easily get lost
l6rffil Desclibas the conditions or situation to start a troubleshooting flowchart.(bold tyDo)
|TeTiONl Asks you to do something; pedorm a test, set up a condition etc'
<:6Eei6io-fr\> Asks you about the result of an action, then sends you in the appropriste troubleshooting direction.
I-SJTFI The snd of a series ot actions and decisions, describes I tinal repair action and aomotimea diracts
(bold typel you to 8n garlier part of the tlowchart to confirm your repair'
NOTE:
a Tha tarm ,,lntormittgnt Failure" is used in these chans. lt simply means a system may have had a failur6, but it chocks
out OK !t this time. lf th6 Msltunction Indicator Lamp (MlL) on ihe dash does not come on, check for poor connections
or loose wires at all connectors rolated to the cilcuit that you are troubleshooting (see illustration b6low).
a Most ot tho troublashooting flowchans have you reset the Engine Control Module (ECM) and try to duplicate the Disg-
nostic Troubls Cod6 (DTC). lf the problem is intermittent and you c8n't duplicat€ the cod6, do not continus through
the flowchart, To do so will only rosult in confusion and, possibly, a ne€dlessly replaced ECM
a ,,opon,'and ,,short,, are common electrical terms. An open is a break in a wir6 or at a conn€ction. A short is an
accidontal connaction ot a wir€ to ground or to another wire. In simple electronics, this usually means som€thing won't
work at all. In complex electronics (like ECM's), this can sometimes mean something wolks, but not the way it's sup-
poSad to,
a il th6 olectricsl readings are not as specified when using the test harness, check the test harness connoctions bsfore
procooding.
LOOSE
11-39