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Description
NGEC0683
SYSTEM DESCRIPTION
NGEC0683S01
Sensor Input Signal to ECM
ECM func-
tion
Actuator
Camshaft position sensor Engine speed
Heated
oxygen
sensor 2
heater
(rear) con-
trol
Heated oxygen sensor 2 heat-
ers (rear)
The ECM performs ON/OFF control of the heated oxygen sensor 2 heaters (rear) corresponding to the engine
speed.
OPERATION
NGEC0683S02
Engine speed rpm Heated oxygen sensor 2 heaters (rear)
Above 3,200 OFF
Below 3,200 ON
CONSULT-II Reference Value in Data Monitor
Mode
NGEC0684
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 HTR (B1)
HO2S2 HTR (B2)
쐌 Ignition switch: ON (Engine stopped)
쐌 Engine is running above 3,200 rpm.
OFF
쐌 Engine is running below 3,200 rpm after driving for 2 minutes at a
speed of 70 km/h (43 MPH) or more.
ON
ECM Terminals and Reference Value
NGEC0685
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 the ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
122 R/B
Heated oxygen sensor 2
heater (rear) (bank 1)
[Ignition switch “ON”]
쐌 Engine stopped
[Engine is running]
쐌 Engine speed is above 3,200 rpm
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
쐌 Engine speed is below 3,200 rpm
쐌 After driving for 2 minutes at a speed of 70 km/h
(43 MPH) or more
Approximately 0.4V
123 R/Y
Heated oxygen sensor 2
heater (rear) (bank 2)
[Ignition switch “ON”]
쐌 Engine stopped
[Engine is running]
쐌 Engine speed is above 3,200 rpm
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
쐌 Engine speed is below 3,200 rpm
쐌 After driving for 2 minutes at a speed of 70 km/h
(43 MPH) or more
Approximately 0.4V
DTC P0141, P0161 HEATED OXYGEN SENSOR 2 HEATER
(REAR) (BANK 1)/(BANK 2)
VG33E
Description
EC-876
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