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HO2S2 HEATER
EC-853
[QR (WITHOUT EURO-OBD)]
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EC
HO2S2 HEATER PFP:226A0
Description BBS001TF
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
CONSULT-II Reference Value in Data Monitor Mode BBS001TG
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine speed
Heated oxygen sensor 2
heater control
Heated oxygen sensor 2 heater
Engine coolant temperature sensor Engine coolant temperature
Mass air flow sensor Amount of intake air
Engine speed rpm Heated oxygen sensor 2 heater
Above 3,600 OFF
Below 3,600 rpm after the following conditions are met.
● Engine: After warming up
● Keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load
ON
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 HTR (B1)
● Engine speed: Below 3,600 rpm after the following conditions are met.
– Engine: After warming up
– Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute
and at idle for 1 minute under no load
ON
● Engine speed: Above 3,600 rpm OFF
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