Mazda CX-9 Grand Touring 2009 Manual page 1757

INSPECT WIRING HARNESS BETWEEN FRONT
CLIMATE CONTROL UNIT AND AIR INTAKE
ACTUATOR FOR SHORT TO B+
Turn the ignition switch to the ON position
*11
Measure the voltage at the following front climate
control unit terminals.
Terminal 10 (RECIRCULATE signal)
Terminal 1M (FRESH signal)
Is the voltage approx. 12 V?
INSPECT A/C UNIT AIR INTAKE DOOR
12
Is there any foreign material or obstruction in the
A/C unit air intake door?
VERIFY THAT A/C UNIT AIR INTAKE DOOR IS
POSITIONED SECURELY AND PROPERLY
13
Is the A/C unit air intake door securely and
properly positioned?
VERFY REPAIR
14
Does the malfunction disappear?
NO.6 INSUFFICIENT AIR (OR NO AIR) BLOWN REAR VENTS
NO.6 INSUFFICIENT AIR (OR NO AIR) BLOWN REAR VENTS DESCRIPTION AND POSSIBLE
CAUSE
6 Insufficient air (or no air) from rear vents
DESCRIPTION
POSSIBLE
CAUSE
DIAGNOSTIC PROCEDURE
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Problem with each rear vent and/or duct
Rear airflow mode does not change when front and/or rear climate control
unit mode switches.
Rear vent mode malfunction
Rear heat mode malfunction
Rear airflow mode actuator malfunction
Open, short circuit in wiring or poor connection between front and rear
climate control unit
Repair the wiring harness between
Yes the front climate control unit and air
intake actuator, then go to Step 14.
Replace the front climate control
No
unit, then go to Step 14.
Remove obstruction, then go to
Yes
Step 14.
No Go to the next step.
Inspect the air intake door for
Yes cracks or damage, then go to the
next step.
Install the air intake door securely
No in the proper position, then go to
the next step.
Troubleshooting completed.
Yes
Explain repairs to customer.
Recheck malfunction symptoms,
No then repeat from Step 1 if the
malfunction recurs.