1998 HONDA CIVIC catalytic

lntake Manifold/Exhaust System
lntake Manifold
Replacement ....................................... 9-2
Exhaust Manifold
Rep|acement ....................................". 9-6
Exhaust Pipe and Muffler
Replacement ...............................'.'.".. 9-9
Three Way Catalytic Converter {TWCI
Inspection .................."'. 9-12
Heated Oxygen Sensor (HO2SI
Rep|acement ...........................'.."....." 9-12
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Exhaust Manifold
Replacement
NOTE: Use new gaskets and self-locking nuts when reassembling.
CAUTION:
. Check for folds or scratch€s on the surface of the gasket.
. Replace with a new gasket it damaged.
D16Y5. D16Y7 engines:
I x 1.25 mm24 N.m {2.4 kgt.m, 17 tbtft}
MANIFOLDBRACKET
PRIMARY HEATEDOXYGEN SENSORIPRIMAFY HO2SI44 N.m {4.5 kgf m, 33 lbtft)Replacement, page 9-12
GASKETReplace.
I x 1.25 mm31 N.m (3.2 kgf.m,23 tbf.ft)Beplace.
WAY CATALYTICCONVERTER {TWCIlnspection, page 9'12
6x1.0mm11 N.m {1.1 kgt m,8 lbf.ft)
SECONDARY HEATEDOXYGEN SENSOR(SECONDARY HO2S}44 N.m 14.5 kgf.m,33 lbf.ft)Replacement, page 9-13
9-6

Gomponent Locations
L
lndex
D16Y5 engine:
{IATISENSORTroubleshooting,
ELECTRICAL LOADDETECTOR IELD) (USA mod6l)Troubleshooting, page 11 179
THROTTLE POSITION ITP)SENSORTroubleshooting, page 1 1-132
MANIFOLD ABSOLUTEPRESSURE IMAPI SENSORTroubleshooting, page 1'l-115
EXHAUST GAS RECIRCULATION
IEGRI VALVE and EXHAUST GAS
RECIRCULATION IEGRI VALVE
LIFT SENSORTroubleshooting, page'l 1-254
INTAKE AIR TEMPERATUR€
IDLE AIR CONTROL (IAC) VALVE
{M/T)Troubleshooting, page 1 1-194
EXHAUST GAS RECIRCULATION{EGRI CONTROL SOLENOIDVALVE ICW)Troubleshooting. page 1 1-254
EVAPORATIVE EMISSIONIEVAPI PUNGE CONTROLSOLENOID VALVETroubf eshooting, Page 1 1'21 1, 243
CRANKSHAFTPOS|TTON/TOP DEAD CENTER/CYLINDERPOS|T|ON
POWER STEERING PRESSURE(PSP) SWITCH (USAI
Troubleshooting, Page 1 1-212
KNoCK SENSoR (Ks)
(cwl
Troubleshooting, Page 1 1'170ICKP/TDC/CYP} SENSOR(Built into the distributor)Troubleshooting, Page 1 1'172
VEHICLE SPEED SENSORTroubleshooting, Page 1 1-176
FLUCTUATION (CKF} SENSOR
Troubleshooting, Page 1 1 -183
ENGINE COOLANTTEMPERATUREIECT) SENSORTroubleshooting, Page 11 128
IDT.ECONTROL IIACI VALVE
{cw)Troubleshooting, Page 11 198
WAY CATALYTICCONVERTER ITWCITroubleshooting, Page 1 1-252PRIMARY TIEATEDSENSOR {PNIMARY HO2SI
tsENsoR 1t {M/TlTroubleshooting, Page'l 1-146
PRIMARY HEATED OXYGENSENSOR (PRIMARY HO2SI
tsENsoR 1l {cw}Troubleshooting, Page 1 1-139
SECONDARY HEATED OXYGENSENSOR {SECONDARY HO2S){SENSOR 2)Troubleshooting, page 11 153
(cont'd)
1 1-3

D16Y7 engine:
ELECTRICAL LOAO
DETECTOR (ELD) IUSA}Troubleshooting, Page 11'179
THROTTLE POSITION ITPISENSOR
MANIFOLD ABSOLUTEPRESSURE (MAPI SENSORTroubleshooting, Page 1 1-1 15r1-132
CRANKSHAFTPOSTTTON/TOP DEAD CENTER/
CYLINDERPOSITION
POWER STEERll\lG PRESSURE
{PSP' SWTTCH {USA)Troubleshooting, Page 11 212
IDLE AIR CONTROL (IAC) VALVE
Troubleshooting, page 1 1-198
Troubleshooting,
VEHICLE SPEED SENSOR (VSSI
Troubleshooting, Page 1 1-176
INTAKE AIR TEMPERATURE
IIATI SENSORTroubleshooting, page 11 124
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CRANKSHAFT SPEED
{CKP/TDC/CYPI SENSOR(Built into the distributorlTroubleshooting, Page 't 1-172
FLUCTUATION ICKFI SENSORTroubleshooting, Page 1 1-183
PRIMARY HEATED OXYGEN
SENSOR (PRIMARV HO2S)
{SENSOR 1lTroubleshooting, page 1 1'139
ENGINE COOLANTTEMPERATURE(ECTI SENSORTroubleshooting, page 11 128
EVAPOBATIVE EMISSION(EVAPI PURGE CONTROLSOLENOID VALVE
THNEE WAY CATALYTICCONVERTER ITWCITroubleshooting, page 1 1-252
Troubf eshooting, page 1 1 27 1, 283
SECONDARY HEATED OXYGENSENSOR (SECONDARY HO2S)(SENSOR 2lTroubleshooting, Page 1 1-1 53
(cont'd)
,l .ltr| | -r,

Component Locations
Index (cont'dl
Bl6A2 engine:
INTAKE AIR TEMPERATURE{IAT} SENSORTroubleshooting, page 1'1-125
MANIFOLO AESOLUTEPRESSURE IMAPI SENSORTroubleshooting. page 11-1 19IOLE AIR CONTROL {IAC) VALVETroubleshooting, page 1 1,196
ELECTRICAL LOADDETECTOR IELDI (USA)
Troubleshooting, page 1 1-180
THROTTLE POSITION ITPISENSORTroubleshooting, page 11-134
CRANKSHAfiPOStTtON/TOP DEAD CENTER/CYLINDERPOStTtON{CKP/TDC/CYPI SENSOR(Bualt into the distributor)Troubleshooting,page 11-174
POWER STEERING PRESSURE{PSPI SWTTCH (USA)
Troubleshooting, page 1 1-214
VEHICLE SPEED SENSOR {VSS}Troubleshooting, page 1 1-177
ENGINE
CRANKSHAFT SPEEDFLUCTUATION (CKFI SENSORTroubleshooting, page 11- t85TEMPERATUREIECTI SENSORTroubleshooting, page I 1-128
THREE WAY CATALYTICCONVERTER ITWC)Troubleshooting, page 1 1,252
S€CONOARY HEATED OXYGENsf rlsoR
sfCoNDARY HO2SI {SENSOR 2): ?shootrng, page 11 155
-6
PRIMARY HEATED OXYGEN SENSORIPRIMARY HO2S) ISENSOR 1ITroubleshooting, page 1 1-141
11

Dl6Y5 engine ('96 - 97 modelsl:
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PRIMARY HEATED OXYGEN SENSOR {PRIMARY HO2S,
SENSOR 1'SECONDARY HEATED OXYGEN SENSOR (SECONDARY
HO2S. SENSOR 2l
MANIFOLD ABSOLUTE PRESSURE {MAP) SENSOR
ENGINE COOLANT TEMPERATURE (ECTI SENSOR
INTAKE AIR TEMPERATURE IIAT) SENSOR
KNOCK SENSOR (KS)
CRANKSHAFT SPEED FLUCTUATTON (CKF} SENSOR
IOLE AIR CONTROL (IAC} VALVE
THROTTLE BODY (TBI
FUEL INJECTORFUEL PULSATION DAMPER
FUEL FILTERFUEL PRESSURE REGULATORFUEL PUMP IFPIFUEL TANK
:li Vacuum hose No*: CVT only
FUEL TANK EVAPORATIVE EMISSTON {EVAP) VALVE
AIR CLEANERRESONATORPOSITIVE CRANKCASE VENTIL/ATION IPCVI VALVE
EXHAUST GAS RECIRCULATION IEGR) CONTROL
SOLENOID VALVEEXHAUST GAS RECIRCULATION (EGRI VALVE
EXHAUST GAS RECTRCULATION IEGRI VALVE LIFT
SENSOREVAPORATIVE EMISSION IEVAPI PURGE CONTROL
SOLENOID VALVEEVAPORATIVE EMISSION {EVAP} CONTROL CANISTER
EVAPORATIVE EMISSION {EVAP} TWO WAY VALVE
THREE WAY CATALYTIC CONVERTER (TWCI
{Do(D
@@
@@
@
@@@
(cont'd)
1 1-19
!'a

System Description
Vacuum Connections (cont'd)
D16Y5 engine ('98 modet):
-: Vacuum hose No,*: CW only
(9 POSITIVE CRANKCASE VENTILATION {PCV} VALVE?!J EXHAUST GAS BECIRCULATION (EGR}CONTROLSOLENOIO VALVE'1 ExHAUST GAs RECIRCULATIoN IEGRI VALVE22 EXHAUST GAS RECIRCULATION {EGR} VALVE LIFISENSOR€J EvApoRATtvE EMtsstoN {EvAp} puRGE coNTRoLSOLENOID VALVEq4 PURGE JOINT@ EVAPoRATIVE EMIssIoN {EVAP) coNTRoL CANISTER@ EVAPORATIVE EMISSION IEVAP} BYPASS SOLENOIDVALVE?? EVAPORATIVE EMISSION {EVAP) THREE WAY VALVEITII EVAPORATIVE EMISSION IEVAP} CONTROL CANISTERVENT SHUT VALVEO FUEL TANK PRESSURE sENsoRQlI EVAPORATIVE EMISSION {EVAP}TWO WAY VALVE8' THREE WAY CATALYTIC CONVERTER {TWCI
il) PRIMAFY HEATED OXYGEN SENSOR IPRIMARY HO2S.SENSOR 1)O SECoNDARY HEATEo oxYGEN sENsoR {sEcoNDARYHO2S. SENSOB 2)iq] MANIFOLD ABSOLUTE PRESSURE (MAPI SENSORO ENGINE COOLANT TEMPERATURE IECT) SENSOR5 INTAKE AIR TEMPERATURE {IATI SENSOR! KNOCK SENSOR tKSlO CRANKSHAFT SPEED FLUCTUATIoN {cKF) sENsoFO IDLE AIR coNTRoL {IAc) vALvE99 THROTTLE BODY ITBI@ FUEL INJECToRO FUEL PULSATION DAMPER@ FUEL F -TER@ FUEL PRESSURE REGULAToR[4 FUEL PUMP IFPI(9 FUEL TANK(D FUEL TANK EVAPoRATIVE EMIssIoN IEVAPI VALVEO' AIR CLEANER(D RESoNAToR
11-20

D16Y5 engine ('99 - 00 modelsl:
O) PRIMARY HEATED OXYGEN SENSOR (PBIMARY HO2S,
SENSOR 1)
O SECONDARY HEATEO OXYGEN SENSOR {SECONDARY
HO2S. SENSOR 2)
6] MANIFOLD ABSOLUTE PRESSURE IMAPI SENSOR
rO CruCIruC COOUruT TEMPERATURE IECTI SENSOR
o rrurlxe ln ETUpERATURE 0AT) SENSOR
.d KNOCK SENSOR (KS}
O CN,NruXSXITT SP:ED FLUCTUATION (CKFI SENSOR
@ rou an corurnoL 0Ac) valvE
O THROTTLE BODY (TB)
@ FUEL INJECTOR
E) FUEL PULSATION OAMPER
t? FUEL FILTER
G) FUEL PRESSURE REGULATOR
OI FUEL PUMP (FP)
Gi FUEL TANK
G) AIR CLEANERfi? RESONATOR
Gl posmvr cnglrcAsE VENTILATION (PCV) VALVE
@ EXHAUST GAS RECIRCULATION IEGR} CONTROL
SOLENOID VALVE6 EXHAUST GAS RECTRCULATION (EGR) VAI-VE
rf exxlust cls nectRcuLATloN IEGR) vALvE LIFT
SENSOR@ EVAPORATIVE EMISSION (EVAPI PURGE CONTNOL
SOLENOID VALVE
O} PURGE JOINTio :vaponanve eutssloN (EVAP) coNTRoL cANlsrER
d rvlponlrtve EmtsstoN tEvAPl BYPASS soL-eNolD
VALVE
6 EVAPORATIVE EMISSION {EVAP) CONIROL CANISTER
FILTER
@ EVAPORATIVE EMISSION (EVAPI CONTROL CANISTER
VENT SHUT VALVEOA FUEL TANK PRESSURE SENSOR
6 :vlponlnvg er,/tlssloN tEvAPl TWO WAY VALVE
6 oNgoano nerueltNc vAPoR REcovERY {onvRl VENT
SHUT VALVE
€!) ONBOARD REFUELING VAPOR RECOVERY (ORVRI VAPOR
RECIBCULATION VALVE
@ THREE WAY CATALYTIC CONVERTER (TWCI
(cont'd)
11-21
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