Manual 3rd

Fig 1: Blower Fan Speed Control Signal Voltage Graph (Manual 3rd)

Courtesy of MAZDA MOTORS CORP.

Climate control unit terminal 

• Q(+)-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