July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
System Description
Fig 1: A/F Sensor 1 Heater System Description
Courtesy of NISSAN MOTOR CO., U.S.A.
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.