Mazda CX-9 Grand Touring 2009 Manual page 1725

Rear
Rear climate
3G temperature
control unit
control volume
Rear climate
3H +5 V
control unit
Rear climate
3I Ground
control unit
Panel light
3J Instrument cluster
control input
2008 Mazda CX-9 Grand Touring
2008 HVAC Control System (HVAC) - Mazda CX-9
Moving towards
COLD
Temperature control
dial (rear side):
Moving towards
medium
temperature
Temperature control
dial (rear side):
Moving towards
HOT
Under any
condition
Under any
condition: Inspect
for continuity to
ground
Turn the headlight
switch to the off
position
Turn the headlight
switch to the TNS
position
less continuity, short circuit
(Front climate control
unit-rear airflow mode
actuator: 3G-C)
Approx.
Rear climate control
2.5
unit
Front climate control
unit: terminal voltage
Approx.
(2B)
4.2
Wiring harness:
continuity (Front
5.0
climate control unit-
ground: 3H-ground)
Wiring harness:
continuity (Front
1.0 or
climate control unit-
less
rear climate control
unit: 31-E)
Wiring harness:
1.0 or
continuity, short circuit
less
(Front climate control
unit-instrument cluster:
3J-1I)
B+
TNS relay
Headlight switch