Manual 7th

Fig 1: Blower Fan Speed Control Signal Waveform (Manual 7th)

Courtesy of MAZDA MOTORS CORP.

Climate control unit terminal 

• I(+)-body ground(-)

  Oscilloscope setting 

• 5 V/DIV (Y), 1 ms/DIV (X), DC range

  Vehicle condition 

• Switch the ignition ON (engine off or on)
• Airflow mode: VENT
• Air intake mode: RECIRCULATE