Cooling fan control signal

Fig 1: Cooling Fan Control Signal Waveform

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• 2AQ(+)-body ground(-)

Oscilloscope setting 

• 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition 

• Fan control module control duty value: 30%

Fig 2: Fan Control Module Signal Waveform

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• 2AQ(+)-body ground(-)

Oscilloscope setting 

• 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition 

• Fan control module control duty value: 80%