Air Mix Actuator Inspection (Manual A/C)

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

If the lever position exceeds the operation range shown in the figure, the circuit in the actuator could be damaged. Always perform an actuator operation inspection with the lever movement within the range shown in the figure.

Connect battery positive voltage to air mix actuator terminal C (or B), connect terminal B (or C) to ground, and then verify that the air mix actuator operates as shown in the table.

If the operation condition is not normal, replace the air mix actuator.

Fig 1: Checking Air Mix Actuator Operation

Courtesy of MAZDA MOTORS CORP.

Terminal		Air mix actuator operation
B	C	Air mix actuator operation
B+	Ground	HOT → COLD
Ground	B+	COLD → HOT

Verify that the resistance between terminals F and G, E and F matches the air mix actuator operation as shown in the graph.

Fig 2: Air Mix Actuator Operation Graph
Courtesy of MAZDA MOTORS CORP.
- If the operation condition and resistance are not normal, replace the air mix actuator.