HO2S heater control signal

Fig 1: HO2S Heater Control Wave Pattern Signal

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• 2BJ (+) -body ground (-)

Oscilloscope setting 

• 5 V/DIV (Y), 50 ms/DIV (X), DC range

Vehicle condition 

• Idle (immediately after starting engine)