Air Mix Actuator Inspection [Manual Air Conditioner]

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

If the door 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 door movement within the range shown in the figure.

Connect battery positive voltage to air mix actuator terminal A (or B), connect terminal B (or A) to ground, and then verify that the air mix actuator operates as shown in AIR MIX ACTUATOR OPERATION REFERENCE .

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

Fig 1: Connecting Battery Positive Voltage To Air Mix Actuator Terminals And Ground

Courtesy of MAZDA MOTORS CORP.

AIR MIX ACTUATOR OPERATION REFERENCE

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

Verify that the resistance between terminals E and D, and F and E matches the air mix actuator operation as shown in the graph. See Fig 2.
- If the operation condition and resistance are not normal, replace the air mix actuator.
  
  Fig 2: Air Mix Actuator Resistance Graph
  Courtesy of MAZDA MOTORS CORP.