nissan Workshop Repair Guides

Nissan and Datsun Workshop Service and Repair Manuals

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Oxygen Sensor: Description and Operation

A/F SENSOR 1 HEATER

Description

SYSTEM DESCRIPTION

The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating condition to keep the temperature of A/F
sensor 1 element at the specified range.

HO2S2 HEATER

Description

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

A/F SENSOR 1

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