Mazda CX-9 Grand Touring 2007 Manual page 885

2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
DIAGNOSTIC PROCEDURE
DIAGNOSTIC PROCEDURE
STEP INSPECTION
1 Inspect the following:
Engine coolant level
Coolant leakage
Water and anti-freeze mixture
Radiator condition
Collapsed or restricted radiator
hoses
Radiator pressure cap
Overflow system
Fan rotational direction
Fuses
Are all items normal?
2 Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position
(Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
3 Start the engine and idle it.
Turn the A/C switch on and set blower fan
to any speed.
Does the A/C compressor engage?
2007 Mazda CX-9 Grand Touring
Improper tension of drive belt
Drive belt damage
RESULTS ACTION
Yes Go to the next step.
No Service if necessary.
Repeat Step 1.
Yes DTC is displayed:
Go to the appropriate DTC
inspection.
(see DTC TABLE [MZI-3.5] .)
No No DTC is displayed:
Go to the next step.
Yes Go to Step 5.
No Inspect for the following and repair
or replace if necessary:
Refrigerant charging amount
Open circuit in wiring harness
between A/C relay and PCM
terminal 1N
Seized A/C magnetic clutch
A/C magnetic clutch
malfunction
If all items are normal, go to the next