Blower Fan Controller Inspection: Notes

1. Switch the ignition ON (engine off or on).
2. Connect the negative (-) lead of the tester to body ground.
3. Insert the positive (+) lead of the tester into each blower fan controller terminal.
4. Measure the voltage according to the terminal voltage table.
   • If there is any malfunction, inspect the parts under "Inspection item (s)".
     • If the parts under "Inspection item (s)" are found to be normal, replace the blower fan controller.

Fig 1: Blower Fan Controller Circuit Diagram - Full-Auto Air Conditioner

Courtesy of MAZDA MOTORS CORP.