Exhaust manifold HONDA CIVIC 1998 6.G User Guide

Exhaust Manifold
Replacement (cont'dl
NOTE: Use new gaskets and self-locking nuts when reassembljng.
CAUTION:
. Check for folds or scratches on the surface ot the gask€t.
. R€place with a new gaskot if damagod,
B16A2 engine:
GASKETReplace.
10 x 1.25 mm44 N.m {4.4 kgt.m,33 tbl.ft)SELF.LOCKING NUT8 x 1 .25 mm31 N.m (3.2 kg{.m, 23 lbf.ft)Replace-EXHAUST MANIFOLDBRACKET
10 x 1.25 mm4{ N.m (4.5 kgf.m. 33 tbt.fil
9-8

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

System Description
Vacuum Connections
D16Y5 engin6 ('96 - 97 modelsl:
To EVAPORATIVE EMISSION(EVAPI
TWO WAY VALVE
MANIFOLDABSOLUTEPRESSURE IMAPISENSOR
€VAPORATIVEEMISSION IEVAPIPURGE CONTROL SOLENOIDVALVE
EXHAUST GAS BECIRCULATION(EGR) VALVE end EXHAUST GASRECIRCULATION IEGR) VALVELIFT SENSOR
Qo
FRONT OF VEHICLE
To CRUISECONTROLDIAPHRAGM(wath cruise control)
Qo
O: Vacuum hose No.
11-12
EXHAUST GAS RECIRCULATION(EGR) CONTROL SOLENOID VALVE {CVT}\.'.-' \
I
I
)
FUEL PRESSURE REGULATOR

D16Y5 engine l'98 - 00 models):
To EVAPORATIVE EMISSIONtEVAPI THREE WAY VALVE {98 model)
To EVAPORATIVE EMISSIONIEVAP' CONTBOLCANISTERFILTER 1'99 - 00 modelsl
EVAPORATIVE EMISSION {EVAPICONTROL CANISTERVENT SHUT VALVE
To EVAPORATIVE EMISSION
l'99 - 00 modelsl {EVAP)TWO WAY VALVE
EXHAUST GAS RECIRCULATION(EGRI VALVE and EXHAUST GASRECIRCULATION IEGRI VALVELIFT SENSORtcwl
..,.-----.-(CWontylEXHAUST GAS RECIRCULATION
IEGR} CONTROL SOLENOIOVALVE ICVTI
,t'ffi,
ig
EVAPORATIVEEMISSION {EVAP)PURGE CONTROLCANISTER
MANIFOLDABSOLUTEPRESSURE {MAPISENSOR
EVAPORATIVEEMISSION {EVAP)Qo
To CRUISECONTROLDIAPHRAGM(with cruise control)PURGE CONTROL SOLENOIDVALVEFRONT OF VEHICLE
FUEL PRESSURE REGULATOR
o: Vacuum hose No.
(cont'd)
1 1-13
L

Dl6Y5 engine ('96 - 97 modelsl:
o
,6i
@
o@€)@o
@(il(i'
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
L

Troubleshooting
Troubleshooting Procedures (cont,dl
ECM/PCM Data
By connecting the OBD ll scan tool or the Honda pGM Tester to the l6p data link connector (DLC), various data can beretrieved from the EcM/PcM. The items Iisted in the table below conform to the sAE recommended practice.The Honda PGM Tester also reads data beyond that recommended bv SAE.understanding this data wil help to find the causes of intermittent fairures or engine probrems,
NOTE:
' The "operating values" given below are approximate values and may be different depending on the environment andthe individual vehicle.. Unless noted otherwise, "at idle speed,, means idling with the engine completely warmed up, Ay'T in position @ or E],M/T in neutral, and the Ay'C and all accessories turned off.
(
DataDescriptionOperating ValueFreeze Data
Diagnostic
Trouble Code(DTC)
lf the ECM /PCM detects a problem, it will store it as acode consisting of one letter and four numbers.Depending on the problem, an SAE-defined code (poxxx)or a Honda-defined code (Plxxx) will be outDut to therester.
lf no problem is detected,
there is no output.
YES
Engine SpeedThe ECM/PCM computes engine speed from the signalssent from the Crankshaft Position sensor.This data is used for determining the time and amount offuel injection,
Nearly the same as
tachometer indication.YES
Vehicle SpeedThe ECM/PCM converts pulse signals from the VehicleSpeed Sensor (VSS) into speed data.Nearly the same as
speedometer indicationYES
Manifold
Absolute
Pressure {MAP)
The absolute pressure caused in the intake manifold bvengine load and speed.With engine stopped:
Nearly the same as atmo-
spheflc pressure
At idle speed:
24 - 31 kPa (180 - 280
mmHg, 7.1 - 11.0 inHg)
YES
Engine Coolant
Temperature
(ECT)
The ECT sensor converts coolant temperature into volt_age and signals the ECM/PCM. The sensor is a thermistorwhose internal resistance changes with coolant temDera_ture. The ECM/PCM uses the voltage signals from theECT sensor to determine the amount of iniected fuel.
With cold engine:
Same as ambient temper,
ature and IAT
With engine warmed up:
176 - 194.F (80 - 90.C)
YES
Heated Oxygen
Sensor {HO2S)(Primary,
Sensor 1)(Secondary
Sensor 2)
The Heated Oxygen Sensor detects the oxygen contentin the exhaust gas and sends voltage signals to theECI\4/PCM. Based on these signats, the ECM/pCM con_trols the airlfuel ratio. When the oxygen content is high(that is, when the ratio is leaner than the stoichiometricratio), the voltage signal is lower.When the oxygen content is low (that is, when the ratiois richer than the stoichiometric ratio), the voltage signalis higher.
0.0 - 1.25 V
At idle speed:
about 0.1 - 0.9 V
NO(Sensor 1)
1 1-86

Diagnostic Trouble Code (DTCI Chart
connector is connecteda1: Dl6Y5 engine (CVT)*2: Except D16Y5 engine (M/T)*14:'97 model*15:'96 model*16: '98 model
(cont'd)
11-97
DTC
{MlL indication*lDelection liemProbable CausePage
Manifold Absolute
Pressure Circuit
Range/Performance Problem
. Vacuu m connection. MAP sensor11115
P0107 (3)
Manifold Absolute
Pressure Circuit
Low Input
Open or short in MAP sensor circuit
MAP sensor
ECMiPCM
TCM*1
11't1'l
P0108 (3)Manifold Absolute
Pressure Circuit
High Input
Open in MAP sensor circuit
MAP sensor
ECtvt/PCM
't 1 121
P0.111*14. *15 (10)
lntake Air Temperature
Circuit
Range/Performance Problem
. IAT sensor11-124
PO112 {10}
Intake Air
Temperature Circuit
Low Input
Short in IAT sensor circuit
IAT sensor
ECMiPCM
11-125
P0113 (10)lntake Air
Temperature Circuit
High Input
Open in IAT sensor circuit
IAT sensor
ECM/PCM
't1-126
P0116 (86)Engine Coolant
Temperature Circuit
Range/Performance Problem
. ECT sensor. Cooling system11-124
PO't't7 {6)
Engine Coolant
Temperature Circuit
Low Input
Short in ECT sensor circuit
ECT sensor
ECM/PCM
11-129
P0118 (6)Engine Coolant
Temperature Circuit
High lnput
Open in ECT sensor circuit
ECT sensor
ECM/PCM
11-130
?0122 t1l
Throttle Position
CircuitLow Input
Open or short in TP sensor circuit
TP sensorECM/PCM
TCM*1
11-132
P0123 (7)Throttle Position
Circuit
High Input
Open in TP sensor circuit
TP sensor
ECM/PClvl
11-136
P0131*' (1)
Primary Heated Oxygen Sensor
Circuit Low Voltage(Sensor 1)
Short in Primary HO2S (Sensorl ) circuit
Primary HO2S {Sensor 1)
Fuel supply system
ECM/PCM
1 1-139
P0132*' ('r)
Primary Heated Oxygen Sensor
Circuit High Voltage(Sensor 1)
Open in Primary HO2S {Sensor 1} circuit
Primary HO2S (Sensor 1)
ECM/PCM
1 1- 143
P0133*' (61)
Primary Heated Oxygen Sensor
Slow Response(Sensor 1)
. Primary HO2S (Sensorl). Exhaust system11-145
P0135*? (41)
Primary Heated Oxygen
Sensor Heater
Circuit Malfunction(Sensor 1)
. Open or short in Primary HO2S(Sensor 1) heater circuit. ECM11-151
*: The DTCS in parenthesis will be indicated by the blinking of the Malfunction Indicator Lamp (MlL) when the SCS service
! ta

Primary Heated Oxygen Sensor {Primary HO2SI (Sensor 1)
t('96 - 98 Models except Dl6Y5 engine with M/Tl
The Heated Oxygen Sensor (HO2S) detects the oxygen content in the exhaust gas and signals the ECM/PCM. In operation,
the ECM/PCM receives the sjgnals from the sensor and varies the duration during which fuel is injected To stabilize the
sensor,s output, the sensor has an internal heater. The Primary HO2S (Sensor 1) is installed in the exhaust manifold.
HO2S:
VOLTAGE {VI
The scan tool indicates Diagnostic Trouble Code (DTC) P0131; A low voltage
Oxygen Sensor (H02S) (Sensor 1) circuit.
R|cH-AIR- - LEANFUELRANO
problem in the Primary Heated
SENSOR
ztRcoNlA
The MIL has be€n teported on.DTC P0131 is siorcd.
Problom verificalion:1. Do the ECM/PCM Reset Pro'
cedure.2. Start the engine. Hold theengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on,3. Test-drive with the A/T in Eposition (M/T in 4th gear)
4. Check the Primary HO2S(Sensor 1) output voltage with
the scan tool during accelera-
tion using wide open throttle.
lntcrmift€nt failura, 3Y3tem is OKat this tims. Check for Poor con-nections or loo3e wi.o3 at C123(Primlry HO2S, 3sn3or 1) and
ECM/PCM,
(To page 1I-140)
{cont'd)
1 1-139