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

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the following parts:
1. Selector lever knob (AT) (See AUTOMATIC TRANSMISSION SHIFT MECHANISM REMOVAL/INSTALLATION .)
2. Shift lever knob (MT)
3. Shift panel component (See SHIFT PANEL REMOVAL/INSTALLATION .)
4. Upper panel (See UPPER PANEL REMOVAL/INSTALLATION .)
5. Parking brake lever boot panel (See PARKING BRAKE LEVER BOOT PANEL REMOVAL/INSTALLATION .)
6. Rear console (See REAR CONSOLE REMOVAL/INSTALLATION .)
7. Front console panel (See FRONT CONSOLE PANEL REMOVAL/INSTALLATION .)
8. Front console component (See FRONT CONSOLE REMOVAL/INSTALLATION .)
9. Scuff plate (See SCUFF PLATE REMOVAL/INSTALLATION .)
10. Front side trim (See FRONT SIDE TRIM REMOVAL/INSTALLATION .)
11. A-pillar trim (See A-PILLAR TRIM REMOVAL/INSTALLATION .)
12. Hood release lever (See HOOD RELEASE LEVER AND RELEASE CABLE REMOVAL/INSTALLATION .)
13. Driver-side lower panel (See DRIVER-SIDE LOWER PANEL REMOVAL/INSTALLATION .)
14. Passenger-side lower panel (See PASSENGER-SIDE LOWER PANEL REMOVAL/INSTALLATION .)
15. Center panel No. 1 (See CENTER PANEL No. 1 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. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
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 Q), replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION (AUTO A/C) .)
  - For terminal Q, first try replacing the blower fan controller. If there is still any malfunction, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION (AUTO A/C) .)
Courtesy of MAZDA MOTORS CORP.