Blower Fan Controller Inspection (Auto A/C): Notes

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
2. Remove the following parts:
   1. Glove compartment (See GLOVE COMPARTMENT REMOVAL/INSTALLATION .)
   2. Dashboard under cover (See DASHBOARD UNDER COVER REMOVAL/INSTALLATION .)
   3. Passenger-side side wall (See SIDE WALL REMOVAL/INSTALLATION .)
   4. Passenger-side front heat duct (See FRONT HEAT DUCT REMOVAL/INSTALLATION .)
3. Remove the blower fan controller. (See BLOWER FAN CONTROLLER REMOVAL/INSTALLATION (AUTO A/C) .)
4. Connect the blower fan controller connector.
5. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
6. Switch the ignition ON (engine off or on).
7. Connect the negative (-) lead of the tester to body ground.
8. Insert the positive (+) lead of the tester into each blower fan controller terminal.
9. 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. (See BLOWER FAN CONTROLLER REMOVAL/INSTALLATION (AUTO A/C) .)
   Fig 1: Installing Blower Fan Controller

   Courtesy of MAZDA MOTORS CORP.

Terminal Voltage Table (Reference)