Climate Control Unit Inspection (Auto A/C): Notes

WARNING: This page is about a different car, the 2018 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Climate Control Unit

Courtesy of MAZDA MOTORS CORP.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the following parts:
(1) Console side panel (See CONSOLE SIDE PANEL REMOVAL/INSTALLATION .) (2) Switch panel (See SWITCH PANEL REMOVAL/INSTALLATION .) (3) Cup holder (See CUP HOLDER REMOVAL/INSTALLATION .) (4) Selector lever knob (ATX) (See SELECTOR LEVER COMPONENT REMOVAL/INSTALLATION .) (5) Shift panel (See SHIFT PANEL REMOVAL/INSTALLATION .) (6) Front console box (See FRONT CONSOLE BOX REMOVAL/INSTALLATION .) (7) Side wall (See SIDE WALL REMOVAL/INSTALLATION .) (8) Rear console (See REAR CONSOLE REMOVAL/INSTALLATION .) (9) Driver-side front scuff plate (See FRONT SCUFF PLATE REMOVAL/INSTALLATION .) (10) Driver-side front side trim (See FRONT SIDE TRIM REMOVAL/INSTALLATION .) (11) Lower decoration panel (See DECORATION PANEL REMOVAL/INSTALLATION .) (12) Hood release lever (See HOOD RELEASE LEVER AND RELEASE CABLE REMOVAL/INSTALLATION .) (13) Fuel filer lid opener lever (See FUEL-FILLER LID OPENER AND LEVER REMOVAL/INSTALLATION .) (14) Driver-side lower panel (See LOWER PANEL REMOVAL/INSTALLATION .) (15) Center lower panel (See CENTER LOWER PANEL REMOVAL/INSTALLATION .)
Remove the climate control unit with the connector connected. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION (Auto A/C) .)
Connect the negative battery terminal.
Switch the ignition ON (engine off or on).
Connect the negative (-) lead of the tester to body ground.
Insert the positive (+) lead of the tester into each climate control unit terminal and 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 (except for terminal 1T), replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION (Auto A/C) .)
  - For terminal 1T, first try replacing the blower fan controller. (See BLOWER FAN CONTROLLER REMOVAL/INSTALLATION .) If there is still malfunction, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION (Auto A/C) .)