Heated Oxygen Sensor (Ho2Sl Heater - Honda Prelude 1993 Service Manual

PGM-FI System
Troubleshooting Flowchart - Heated Oxygen Sensor (HO2Sl Heater
:ml1:f,f-f :
The Mattunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 41: A problem in
-Y-
-*-
the Heated Oxygen Sensor (HO2S) Heater circuit.
-[6]- ]l-rTll
/
-]-\
7.---:- \
H23Al ongino {USA: Si/Clnada: SR)
H22Al engin. {uSA: Si vTEc/Canada: SR-VI:
D
10-r|o
o?
DIGITAL
MULTIMETER
KS-AHM-32-003
DIGITAL
MULTIMETEB
KS-AHM-32-003
1 1 - 5 8
- Engino ia running,
- Tho MIL hsr bcon roportod on.
With rervica chock connoctol
iumpod (soo page 11421, codo
41 ir indicalod.
Do the ECM Rsset Procedure (see
p a g e 1 1 - 4 3 ) .
lrrtd$frqrttS$6,3ys-
tom 13 OK at thi! tlmo
Itost drlvo maY bo
nacrsrsryl.
Chock lor poot connoc-
tionr or 10036 wirot rt
C432 llocat.d at right
shock toworl, C114
lHO2Sl and EcM.
ls the MIL on and does it indi-
cate code 41?
Turn the ignition switch OFF.
Disconnect the 4P connector from
the HO25.
Me6sute tesistance betweon ter-
minsls C and D on the HO2S.
ls there 1O-4O 0?
( T o p a g e 1 1 - 5 9 )