Mazda CX-9 Grand Touring 2009 Manual page 1719

Rear blower
Rear power MOS
1V fan speed
FET
control
1W IG2 A/C 7.5 A fuse
1X Ground Body ground
ECT sensor
2A Instrument cluster
signal
2B +5V
2008 Mazda CX-9 Grand Touring
2008 HVAC Control System (HVAC) - Mazda CX-9
Rear airflow
volume
control dial
Ignition switch is at
ON position
Ignition switch is at
LOCK position
Under any
condition: Inspect
for continuity to
ground
Because this terminal is for
communication, good/no
good judgment by terminal
voltage is not possible.
Driver-side
front air mix
actuator
Passenger-
Under any
side front air
condition
mix actuator
Front
airflow
mode
actuator
Solar
radiation
Front climate control
unit: terminal voltage
(1W, 1X)
1.0 or
Off
less
Approx.
1st.
2.1
Approx.
2nd.
Front climate control
2.2
unit: terminal voltage
Approx.
3rd.
(1T)
2.2
Approx.
4th.
2.3
Approx.
5th.
2.4
Wiring harness:
B+
continuity, short circuit
(Front climate control
unit-fuse: 1W-A/C 7.5
1.0 or
A)
less
A/C 7.5 A fuse
Wiring harness:
1.0 or
continuity (Front
less
climate control unit-
ground: 1X-ground)
Wiring harness: short
circuit (Front climate
control unit-driver-side
front air mix actuator,
passenger-side front air
mix actuator, front
airflow mode actuator,
solar radiation sensor,
5.0
rear air mix actuator,
rear airflow mode
actuator: 2B-A, A, A,
C, A, A)
Driver-side front air
mix actuator
Passenger-side front
-