2.4
5th.
Approx.
2.5
6th.
Approx.
2.7
7th. Approx.
10.7
1S
A/C
Refrigerant
pressure switch
Fan switch on, A/C
switch on
1.0 or
less
z
Front climate control
unit: terminal voltage
(1W, 1X)
Fan switch off
B+
z
Wiring harness:
continuity, short circuit
(Front climate control
unit-refrigerant
pressure switch: 1S-B)
(Refrigerant pressure
switch-PCM: C-1B)
z
Refrigerant pressure
switch
z
PCM: terminal voltage
(1B)
1T
Rear blower
motor
feedback
Rear power MOS
FET
Rear airflow
volume
control dial
Off
Approx.
8.5
1. Wiring harness:
continuity, short circuit
(Front climate control
unit-rear power MOS
FET: 1T D, 1V C)
2. Wiring harness:
continuity (Rear power
MOS FET-body
ground: A-ground)
3. Rear power MOS FET
4. Rear blower motor
5. Rear blower relay
6. R.HEATER 40 A fuse
1st.
Approx.
6.1
2nd. Approx.
4.8
3rd.
Approx.
3.6
4th. Approx.
1.9
5th.
1.0 or
less
1U
On-board
diagnostic
signal
Check connector
Check connector is
shorted.
1.0 or
less
z
Wiring harness:
continuity (Front
climate control unit-
check connector: 1U-
A)
Other
B+
z
Wiring harness: short
circuit (Front climate
control unit-check
connector: 1U-A)
2008 Mazda CX-9 Grand Touring
2008 HVAC Control System (HVAC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:12:36 AM
Page 39
© 2005 Mitchell Repair Information Company, LLC.