infiniti Workshop Repair Guides

Infiniti Workshop Service and Repair Manuals

Diagram Information and Instructions|Page 6498 > < Diagram Information and Instructions|Page 6496
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Oxygen Sensor: Description and Operation

HO2S1 HEATER

System Description

Operation

Description

The ECM performs ON/OFF control of the heated oxygen sensor 1 heater corresponding to the engine speed and engine coolant temperature. The duty
percent varies with engine coolant temperature when engine is started.

HO2S2 HEATER

System Description

Operation

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.

HO2S1 

Component Description 

Diagram Information and Instructions|Page 6498 > < Diagram Information and Instructions|Page 6496