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SEF463R
SEF288D
Component Description
NGEC0128
The heated oxygen sensor 1 (front) is placed into the exhaust
manifold. It detects the amount of oxygen in the exhaust gas com-
pared to the outside air. The heated oxygen sensor 1 (front) has a
closed-end tube made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions. The heated oxygen sensor 1 (front) signal is sent to the
ECM. The ECM adjusts the injection pulse duration to achieve the
ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical
change from 1V to 0V.
CONSULT-II Reference Value in Data Monitor
Mode
NGEC0129
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1)
쐌 Engine: After warming up
Maintaining engine speed at 2,000
rpm
0 - 0.3V +, Approx. 0.6 - 1.0V
HO2S1 MNTR
(B1)
LEAN +, RICH
Changes more than 5 times during
10 seconds.
ECM Terminals and Reference Value
NGEC0130
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
50 B
Heated oxygen sensor
1 (front)
[Engine is running]
쐌 After warming up to normal operating tempera-
ture and engine speed is 2,000 rpm
0 - Approximately 1.0V
SEF008W
DTC P0134 HEATED OXYGEN SENSOR 1 (FRONT)
(HIGH VOLTAGE)
KA24DE
Component Description
EC-225
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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