Mazda CX-9 Grand Touring 2009 Manual page 1763

CAUSE
DIAGNOSTIC PROCEDURE
NO.8 AIR FROM FRONT/REAR VENTS NOT COLD ENOUGH DIAGNOSTIC PROCEDURE
STEP INSPECTION
INSPECT DRIVE BELT
Inspect the drive belt.
1
(See DRIVE BELT
INSPECTION [MZI-3.7] .)
Is it normal?
INSPECT REFRIGERANT SYSTEM
PERFORMANCE
Perform refrigerant system
2
performance test. (See
REFRIGERANT SYSTEM
PERFORMANCE TEST .)
Is the operation normal?
INSPECT TO SEE WHETHER
MALFUNCTION IS IN A/C UNIT
INTAKE AND CONDENSER OR
ELSEWHERE
3
Are the refrigerant high-pressure
and low-pressure values both high?
INSPECT A/C UNIT INTAKE
4
Is the A/C unit intake clogged?
INSPECT CONDENSER
Inspect the condenser.
5
(See CONDENSER
INSPECTION .)
2008 Mazda CX-9 Grand Touring
2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9
Malfunction in refrigerant lines
A/C compressor system malfunction, insufficient compressor oil
Over filling of compressor oil, malfunction in expansion valve or A/C unit air
mix link system
Yes Go to the next step.
No
Yes
No
Yes Go to the next step.
No
Yes
No
Yes
No
ACTION
Adjust or replace the drive belt, then go to Step 20.
(See DRIVE BELT
REMOVAL/INSTALLATION [MZI-3.7] .)
Operation is normal. (Recheck malfunction
symptoms.)
Go to the next step.
Go to Step 6.
Remove obstruction, then go to Step 20. (If air does
not reach the evaporator in the A/C unit, heat
exchange does not occur and refrigerant pressure
becomes high. Therefore, removal of obstruction is
necessary.)
Go to the next step.
Adjust refrigerant to the specified amount, then go
to Step 20. (Excessive amount of refrigerant.)
Replace the condenser, or repair and clean the