Airflow Mode Actuator Inspection (Auto A/C)

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.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION .)
Remove the airflow mode actuator. (See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION (AUTO A/C) .)

Apply battery positive voltage and connect the ground to the airflow mode actuator terminals as indicated in the table below and verify the operation condition.

If not as indicated in the table, replace the airflow mode actuator. (See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION (AUTO A/C) .)

B+ Terminal	Ground Terminal	Operation
D	F	DEFROSTER → VENT
F	D	VENT → DEFROSTER

Fig 1: Inspecting Airflow Mode Actuator

Courtesy of MAZDA MOTORS CORP.

Verify that the resistance between terminals B and C, C and A matches the airflow mode actuator operation as shown in the graph.

Fig 2: Airflow Mode Actuator Resistance Graph
Courtesy of MAZDA MOTORS CORP.
- If the operation condition and resistance are not normal, replace the airflow mode actuator. (See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION (AUTO A/C) .)