Control System (HVAC): Overview Mazda 3 BK facelift

Scheme 12

Scheme 13

Scheme 14

Scheme 15

1. Disconnect the negative battery cable.
2. Remove the following parts: Front scuff plate (See FRONT SCUFF PLATE REMOVAL/INSTALLATION.) Front side trim (See FRONT SIDE TRIM REMOVAL/INSTALLATION.) Decoration panel (See DECORATION PANEL REMOVAL/INSTALLATION.) Glove compartment (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.) Car-navigation unit (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
3. Slide the blower case to the position shown in the figure. (L3 with TC)
4. Remove in the order indicated in the table. LF, L3 L3 with TC
5. Install in the reverse order of removal.

Scheme 16

Scheme 17

Scheme 18

1. Connect battery positive voltage to air intake actuator terminal C (or G), connect terminal G (or E) to ground, and then verify that the air intake actuator operates as shown in the table. If the operation condition is not normal, replace the air intake actuator. LF, L3 L3 with TC AIR INTAKE ACTUATOR TERMINALS REFERENCE Terminal Air intake actuator operation C E G B+ - Ground FRESH --> RECIRCULATE - Ground B+ RECIRCULATE --> FRESH

Scheme 19

1. Disconnect the negative battery cable.
2. Remove the following parts: Front doors (See FRONT DOOR REMOVAL/INSTALLATION.) Front scuff plate (See FRONT SCUFF PLATE REMOVAL/INSTALLATION.) Front side trim (See FRONT SIDE TRIM REMOVAL/INSTALLATION.) Decoration panel (See DECORATION PANEL REMOVAL/INSTALLATION.) Glove compartment (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.) PJB (See PASSENGER JUNCTION BOX (PJB) REMOVAL/INSTALLATION.) Car-navigation unit (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.) Side wall (See SIDE WALL REMOVAL/INSTALLATION.) Ashtray panel Console (See CONSOLE REMOVAL/INSTALLATION.) Shift lever component (MTX) (See SHIFT MECHANISM REMOVAL/INSTALLATION [G35M-R] SHIFT MECHANISM REMOVAL/INSTALLATION [A26M-R].) Selector lever component (ATX) (See SELECTOR LEVER COMPONENT REMOVAL/INSTALLATION.) Center panel unit (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) Hood release lever from the lower panel Lower panel (See LOWER PANEL REMOVAL/INSTALLATION.) Shower ducts (LH, RH) Driver-side air bag module (See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.) Column cover (See COLUMN COVER REMOVAL/INSTALLATION.) Meter hood (See METER HOOD REMOVAL/INSTALLATION.) Instrument cluster (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) Steering shaft (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.) A-pillar trim (See A-PILLAR TRIM REMOVAL/INSTALLATION.) Windshield wiper arm and blade (See WINDSHIELD WIPER ARM AND BLADE REMOVAL/INSTALLATION.) Cowl grille (See COWL GRILLE REMOVAL/INSTALLATION.) Cowl panel (See COWL PANEL REMOVAL/INSTALLATION.) Windshield wiper motor (See WINDSHIELD WIPER MOTOR REMOVAL/INSTALLATION.)
3. Disconnect the following connectors: Blower motor connector Power MOS FET connector Evaporator temperature sensor connector Air intake actuator connector Air mix actuator connector Airflow mode actuator connector
4. Remove the rear heat duct (1).
5. Remove the heater case. (See A/C UNIT REMOVAL/INSTALLATION.)
6. Remove the nuts and bolts for installing the dashboard to the body.
7. Slide the dashboard.
8. Remove in the air mix actuator.
9. Install in the reverse order of removal.

See also:
• PASSENGER JUNCTION BOX (PJB) REMOVAL/INSTALLATION
• SHIFT MECHANISM REMOVAL/INSTALLATION [G35M-R]
• SELECTOR LEVER COMPONENT REMOVAL/INSTALLATION
• COWL GRILLE REMOVAL/INSTALLATION
• REFRIGERANT CHARGING