Mazda CX-9 Grand Touring 2009 Manual page 1752

CLIMATE CONTROL UNIT OR AIR INTAKE DOOR
Inspect the A/C unit air intake door.
Is the door free of obstructions, cracks, and
8
damage?
Are the doors securely and properly installed?
Are the above items normal?
VERIFY REPAIR
9
Does the air intake mode change smoothly?
NO.4 NO TEMPERATURE CONTROL WITH FRONT CLIMATE CONTROL
UNIT
NO.3 AIR INTAKE MODE FROM FRONT VENT DOES NOT CHANGE DESCRIPTION AND
POSSIBLE CAUSE
4 No temperature control with front climate control unit
DESCRIPTION
POSSIBLE
CAUSE
DIAGNOSTIC PROCEDURE
NO.3 AIR INTAKE MODE FROM FRONT VENT DOES NOT CHANGE DIAGNOSTIC
PROCEDURE
STEP
INSPECT COOLANT TEMPERATURE
1
Is the engine at operating temperature?
INSPECT A/C UNIT AIR INTAKE
SYSTEM
Inspect the A/C unit air intake links, air
intake cranks, air intake rods, air intake
actuator, and wire clamp.
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Malfunction in A/C unit and/or front climate control unit air mix system
Temperature does not change when switching front climate control unit
temperature setting dial.
A/C unit air intake link, air intake crank, air intake rod, air intake wire, wire
clamp malfunction
Climate control unit rack-and-pinion, air intake wire malfunction
A/C unit air intake door malfunction
Heater piping malfunction
INSPECTION
Replace the climate control unit,
Yes
then go to the next step.
Remove obstruction, or install
the doors in the proper position.
No If any doors are cracked or
damaged, replace them, then go
Troubleshooting completed.
Yes
Explain repairs to customer.
Recheck malfunction symptoms,
No then repeat from Step 1 if the
malfunction recurs.
ACTION
Yes Go to the next step.
No Warm up the engine, then go to Step 9.
Yes Go to the next step.
to the next step.