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Blower Fan Controller Inspection: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
  2. Remove the following parts:
    1. Dashboard under cover (See DASHBOARD UNDER COVER REMOVAL/INSTALLATION .)
    2. Side wall (passenger-side) (See SIDE WALL REMOVAL/INSTALLATION .)
    3. Front heat duct (passenger-side) (See FRONT HEAT DUCT REMOVAL/INSTALLATION .)
  3. Remove the blower fan controller. (See BLOWER FAN CONTROLLER REMOVAL/INSTALLATION .)
  4. Connect the blower fan controller connector.
    Fig 1: Connecting Blower Fan Controller Connector
    G11529228Courtesy of MAZDA MOTORS CORP.
  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)".
Fig 2: Measuring Blower Fan Controller Voltage
G11430219Courtesy of MAZDA MOTORS CORP.
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