Mazda CX-9 Grand Touring 2009 Manual page 1686

DRIVER SIDE
1. Connect battery positive voltage to front air mix actuator terminal F (or G), connect terminal G (or F) to
ground, and then verify that the front air mix actuator operates as shown in the table.
If the operation condition is not normal, replace the front air mix actuator.
FRONT AIR MIX ACTUATOR OPERATION
Terminal
Front air mix actuator operation
F G
B+ Ground
Ground B+
Fig. 9: Front Air Mix Actuator Circuit Diagram - Driver Side
Courtesy of MAZDA MOTORS CORP.
Fig. 10: Inspecting Front Air Mix Actuator - Driver Side
Courtesy of MAZDA MOTORS CORP.
2. Verify that the resistance between terminals A and E, and E and C matches the front air mix actuator
operation as shown in the graph.
If the operation condition and resistance are not normal, replace the front air mix actuator.
2008 Mazda CX-9 Grand Touring
2008 HVAC Control System (HVAC) - Mazda CX-9
HOT --> COLD
COLD --> HOT