Mazda CX-9 Grand Touring 2009 Manual page 1718

Refrigerant
1S A/C
pressure switch
Rear blower
Rear power MOS
1T motor
FET
feedback
On-board
1U diagnostic Check connector
signal
2008 Mazda CX-9 Grand Touring
2008 HVAC Control System (HVAC) - Mazda CX-9
Fan switch on, A/C
switch on
Fan switch off
Rear airflow
volume
control dial
Check connector is
shorted.
Other
2.4
Approx.
5th.
2.5
Approx.
6th.
2.7
Approx.
7th.
10.7
Front climate control
1.0 or
unit: terminal voltage
less
(1W, 1X)
Wiring harness:
continuity, short circuit
(Front climate control
unit-refrigerant
pressure switch: 1S-B)
(Refrigerant pressure
B+
switch-PCM: C-1B)
Refrigerant pressure
switch
PCM: terminal voltage
(1B)
Approx.
1. Wiring harness:
Off
8.5
continuity, short circuit
(Front climate control
Approx.
1st.
unit-rear power MOS
6.1
FET: 1T D, 1V C)
Approx.
2. Wiring harness:
2nd.
4.8
continuity (Rear power
Approx. MOS FET-body
3rd.
ground: A-ground)
3.6
3. Rear power MOS FET
Approx.
4th.
1.9
4. Rear blower motor
5. Rear blower relay
1.0 or
5th.
less
6. R.HEATER 40 A fuse
Wiring harness:
continuity (Front
1.0 or
climate control unit-
less
check connector: 1U-
A)
Wiring harness: short
circuit (Front climate
B+
control unit-check
connector: 1U-A)