ect sensor HONDA CIVIC 1998 6.G Owner's Guide

I
a
System Description
Vacuum Connections (cont'd)
816A2 engine:
@ EvApoRATtvE EMtsstoN tEvAp) puRGE coNTRoLSOLENOID VALVE@ PURGE JoINT€t EvApoRATtvE EMtsstoN (EVApt coNTRoL caNtsTERQA EVAPORATIVE EMISSION (EVAP) BYPASS SOLENOIDVALVE
@ EVApoRATtvE EMtsstoN lEvApl coNTRoL caNtsrERFILTER@ EvApoRATtvE EMtsstoN {EvApt coNrRoL cANtsrERVENT SHUT VALVE@ FUEL TANK PRESSURE sENsoRGI EVAPORATIVE EMISSION (EVAP} TWO WAY VALVE@ ONBOARD REFUETING VAPOR RECOVERY {ORVR} VENTSHUT VALVE@ oNBoAnD REFUELING vApoR REcovERy (oRvRl vApoR. RECIRCULATION VALVE(c} THREE WAY CATALYTIC CONVERTER {TWCI
(' PRIMARY HEATED OXYGEN SENSOR IPRIMARY HO2S.SENSOR 1l.?) SECONDARY HEATED OXYGEN SENSOR {SECONDARYHO2S, SENSOR 2)13] MANIFOLD ABSoLUTE PRESSURE (MAP) sENsoBi' ENGINE COOLANT TEMPERATURE IECT) SENSORO INTAKE AIR TEMPERATURE ITATI SENSORi6l KNOCK SENSOR {KS}O oRANKSHAFT SPEED FLUCTUATIoN {cKF} sENsoR@ IDLE AIR coNTRoL (IAc} VALVE€) THRoTTLE BoDy trB|(D FUEL INJECToRO FUEL PULSATIoN DAMPER[D FUEL FILTER@ FUEL PRESSURE REGULAToR!I FUEL PUMP IFP)f,' FUEL TANK(iD ArR CLEANERt' RESONAToR'.1]i POSITIVE cRANKcAsE VENTILATIoN {Pcv} VALVE
11-28

System Description
Electrical Connections ('96 - 98 Models, ,99 - 00(cont'd)
PRESSURESENSOE
EGR
UFTsENsoR *3
EGR
uF
D16Y5 engine with M/Tl(
SENSOF
solENoto vALvE *3
wec soLeton vltve'!2
SENSOR
SPEED sENsoR'2
COUNTEFSHAFIsPEED sENsoR*2
soeeloto vltve l*2
ToI|{TEFLOCKCONTBOLUNIT
*l: t SA model*2: A/T(DI6W, oi6y8 engine)*3:CVT(DI6Y5 6ngine)1.4 : A"/T and Dl6Y7 engine*5; Except A/T and Dl6Y7 engine*6: A/T(O16YO engin6)*7:CW(DI6y5 ongine) and D16y8 engino*8;'96 Ol6Y8 sngine (coupe), ,97 D16y5ongine (coup€: all modol!, sedan: KLmodoD, '98 Dl6Y5 engine, '98 ot6Y8en9ne*9:D16Y5 engin.*10 : |!UT(D16Y5 engine)*ll : Except iUT(Dl6Y5engine)*12: D16y5, 016yo engino*13: DI6YO engine*14:Dl6Y7 engine*15:'97 D16Y7 engine [coupe: KL modet,ssdan: KL(LX) modetl, '9gDt6y7 engine
c-rrusren vem srur vtvrlf;
ECM/PCMA(32P)ECM/PCi/lBEsP)
ECM/PCMD(16P)
1 1-30
TERMINAL LOCATIONS

System Description
Electrical Connections ('96 - 98 Models, ,99 - 00 Dl6y5 engine with M/T)(cont'd)
ptozs'"
pozslttc*rr
WHT,'RED'l
s02sHTc-BLK/WHT
aLKlyeL!
LraeL*ro
pozsntc*lu
:soL*3
BLU/ALK
12: A/T (Ol6Y7, Dl6Y8 enginel'3: CvT lDt6Y5 engane)ia: A/T and Dl6Y7 enqine15: Erc.pt A/T.nd Dr6Y7 engine'6:A/T (O16Y8.ngine)i7: CVI {D l6Y5 Gosin.) .nd D16yo snqiner8:'96 DI6YB .ngi.. lcoup.), ,97 Dt6ylensio. (coups: lll mod6ts, s.d6n. KLdod6ll,'98 D16y5 6ngine.,9a D16y8ongine,'99 - 00 Ot6Y5 (M/Tlonoine'9: Dl6Y5 ongine'10: M/T lO16Y5 engine)'l r: Ex@pt M/T (Dt6y5 engine)r'12: Ot6Y5, Ol6Y8.ngine
'15r'97 D16Y7.ngine {coupe: Kt- model, sedan:(L (l-Ximod.l), '98 Dl6y7 angins
*12
Ho2s (sENsoF l)
c125
Ho2s (sENsoR 2)
crls*'u
HO2S (SENSOR'
c142
ecR cortnoL*3SOLENOID VALVE
c14o
wrlaeo!{-L wrzneo.=r.:GFN/BLr-I FcFN,wHr Jalvwrr'Ll ar-x,rvnr, -ff
f--fi"-r".^'--] I
;lcnr-caz fi
\
VT€C PRESSURE
11-32

System Description
Electrical Connections ('99 - 00 Models except Dl6Y5 engine with M/Tl
(cont'd)
T:I
1
0
EVAP PURGE CONTROLSoLENOtOVAIVEc26 ECTECTSENSOR
D
EVAP COI{TROL CANISIE R
IATSENSOR
ta-t
c25 tAT
HO2S(sENSoFt
EVAP BYPASS SOI.ENOID VALVE
cl Po2s{tc"Eso! 87
)wEGF coNTRoL solENoro vaLvE'"c16PHO2S
vlsBr2VTEC SOLEr{O|D VATVE
H02SiSENSOR 2),wA23 SHO2S
VTECPFESSUFESWITCH
sEt{soR
-t,.1 f
I
BRAKE SWITCH
c7 sG1
SENSOB(Buln l oF
@E
lfil
*_r
/V | GAUGE
* lassEMBLIIl-
SPEEOSENSOR
tr
D5VBSOLo4tND A14
N DTI
NC DTOSPEEDSENSOR
LS+ Bl7UNEAR SOLENOID VALVET'I AT?04LS- a3
LOCIPr. l03alP03LCA 01P CONTBOISOIENOiDVALVE BLCB 03IOI{IROL SOLENOID VAIV€ A
SHIFI COTITROL SOLENOID VALVE BSHE D2
POStTtON
t----
I
To IIIT!FLOCK CONTROL UNIT
--t
L
l-
I
I
11-40
-.._.._.._.._l
,'-J

System Description
Electrical Connections ('99 - 00 Models except D16Y5 engine with M/Tl
(cont'dl
UFTSENSOR
L
ABS CONTROL UNIT
CONI{ECTOR- BLX
_r "*
\
sEnucE cSEcKCONNEC'OR
11-42
aLul- _--r ".*
"to'
f *31ou..."
I t "on"t"to"
Illl*,

System Description
Electrical Connections ('99 - 00 Models except Dl6Y5 engine with M/Tl
(cont'd)
cl09
racvP*{- BLK/eLu-lqt
pl
MAINSHAFT SPEEO SENSOR
clla
COUN'IERSHAFTSPEED SENSOR
c121
tt I I
UNEARSOL€NOIDVALVE
SOLENOID VALVE --
11-46

System Description
Electrical Connections ('99 - 00 Models except Dl6Y5 engine with M/Tl
(cont'dl
DRIVE PULIEY SPEEO SENSOF
SECONDAFY GEAFSHAFT SPEEO SENSOR
SCLSM
INHSOL
PNK/BLK
YE!'
PNK/BIU
cnvauC
c131 CrKa
GFN/Brf I f cnvsuCL_
,T GEAF POSII|ON SWITCH
11-48

Probable Cause List lFor th€ DTC Chart, see page 11-971*: '99 - 00 models
Probable GausePageSystem
11 1-107Engine Control Module (ECM)/Powertrain Control Module (l'uM)
PGM-Fl main relay
l^^iti^n cwetam
211-230,231
3't't-237
Section 23
51'1-172,183Crankshaft Position/fop Dead Center/Cylinder Fosltlon sensor clrculr' Lr\F selrsor
circuit
Intake Air Temperature (lAT) sensor circuit
ldle Air Control (lAC) Valve
ldle speed adjustment
Throttle bodY
Throftle cable
Manifold Absolute Pressure (MAP) sensor
Throftle Position (TP) sensor
Barometric pressure (BARO) senso'
Mf g"a, po"ition signal (see page 11-216) or clutch switch signal
Brake switch signal
Air Cleaner
lntake air pipe
Three Way Catalytic Converter (TWC)
Evaporative emission (EVAP) control
Contaminated fuel
ORVR vent shut valvs
't1-124
71 1-194
I11-220 - 223
11-241
'1011-244
1111-115
1211-132
13't1-178
14Section 14. 11-218
1511-210
16't1-244
1811-252
1911-261
20
21*11-296
(cont'd)
11-85

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

DataDescriotion
Loop status is indicated as "open" or "closed"'
Closed: Based on the HO2S output, the ECM/PCM deter-
mines the airlfuel ratio and controls the amount of inject-
ed fuel.
Open: lgnoring HO2S output, the ECM/PCM refers to sig-
nals from the TP, MAP, and ECT sensors to control the
amount of injected fuel.
The air/fuel ratio correction coefficient for correcting the
amount ot injected fuel when H02S feedback is in the
closed loop status When the signal from the HO2S is
weak, short term fuel trim gets higher, and the ECM/PCM
increases the amount of injected fuel The airlfuel ratio
gradually gets richer, causing a higher HO2S output
Consequently, the short term fuel trim is lowered, and
the ECMiPCM reduces the amount of injected fuel
This cvcle keeps the airlfuel ratio close to the stoichio-
metric ratio when in closed loop status'
Operating ValueF eeza Data
HO2S
Feedback
Loop Status
At idle speed: closed
YES
Short Term
Fuel Trim
! 20%
YES
Long Term
Fuel Trim
Long term fuel trim is computed from shon term fuel
trim and indicates changes occurring in the fuel supply
svstem over a long Period
lf long term fuel trim is higher than 1.00, the amount of
injecGd fuel must be increased. lf it is lower than 1 00'
the amount of injected fuel must be reduced'
! 20%
YES
lntake Air
Temperature
{IAT)
The IAT sensor converts intake air temperature into volt-
age and signals the ECM/PCM. When intake air tempera-
ture is low, the internal resistance of the sensor
increases. and the voltaqe signal is higher'
With cold engine:
Same as ambient temPer'
ature and ECTYES
At idle speed:
approx. 10 %YESThrottle
Position
Based on the accelerator pedal position, the open'ng
angle of the throttle valve is indicated
lgnition
Timing
lgnition timing is the ignition advance angle set by the
gCV/eCV. tn" gCU/PCM matches ignition timing to the
driving conditions.
CLV is the engine load calculated from the MAP data'
At idle speed: 12'i 2'
(81642 engine: 16" t 2")
BTDC with the SCS ser-
vice connector connected.
NO
Calculated
Load Value
{CLV)
At idle speed:
15-35%
At 2.500 rpm with no load:
12 - 30%
YES
ro
11-87