Acura 1994 Integra Service Manual page 237

PGM-FI System
Heated Oxygen Sensor lHO2Sl
ztRcot{lA
ELEiIE'{T
HEATER
- --.'!- -
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l r P l _ l ! l -
-fi-l:
The Malfunction Indicator Lamp (MlL) indicates Diagnostic Troubls Code (DTC) 1: A problsm in
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the Heated Oxygen Sonsor (HO2S| circuit.
The Heated Oxygen Sensor IHO2S) det€cts th6 oxygon contont in th6 exhaust gas and signals th6 ECM. In operation,
the ECM receiv€s th6 signals trom the sensor and vari€s the duration during which tu6l is iniocted. To stabilize thd sen-
aor's output, tho sensor has 8n intarnal heater and the sensor olemant is coatod with a catslyst. The HO2S is installod
in TWC housing (B18Cl engine) or exhaust pipe B (Bl8Bl €ngine).
sEl{SOR
TERMII{ALS
: t z -t6l-
/ --.-
\
VOLTAGE (V}
sTotcHtoltETnc
AIR-FUEL BANO
HEATEB
TEBMIT{ALS
RICH - AN. - LEAI{
FUEL
RATIO
- Th! mll h.. bo.n raportad on.
- Wlth thr SCS rhon coon cto.
connoctad lr.. p!9. 1t-341,
cod. t l. Indlcltrd.
Oo th€ ECM Res€t Procodure {soo
pag€ 11-35).
Stan the 6ngine. Hold th6 engine
A3,qgq rpm with no load {A/T in
Lryl or lll position, M/T in nourrall
until the radiator lan com6s on.
then lot it idle lor ot least on6
minutg beforo road t€6tin0.
Connoct ths SCS short connoctor
to th6 sorvic€ check connector
lsoo p.g6 1 1-34).
Rood t€st witlthe
automatic
transmission in L?l position (M/T:
4th gear).
Stsrting st l,600 rpm, acc6lorate
u6ing wide open throttlo for at
lesgt 5 seconds. Thsn dgcol€rste
for at lorst 5 s€conds with th€
throttlo completoly closed.
Intarmittd[ t llurc, lyri.m
b Of
!l thla tlmc. Ch.ck lor poor con-
nacdona o? loota wlrat |l C223
(loc.trd
at right $ock towo.l,
Cr 13 (HO2S| lnd ECM.
Ooes the MIL blink and doos it
indic6t6 cod6 1?
Go to plga and partonn tad fot
cod. 43 lr.a p.go l1-501.
1 1-46