Mazda CX-9 Grand Touring 2007 Manual page 894

2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Rumble or grind noise:
Rap or roar noise:
POSSIBLE CAUSE
Other noise:
DIAGNOSTIC PROCEDURE
DIAGNOSTIC PROCEDURE
STEP INSPECTION
1 Is a squealing, click or chirping sound
present?
2 Is a rumbling or grinding noise
present?
3 Is a rattling noise present?
4 Is a hissing noise present?
2007 Mazda CX-9 Grand Touring
Air leakage from intake-air system
Improper drive belt tension
Improper P/S fluid level
Dynamic dumper looseness
Exhaust system looseness
Intake-air system looseness
Camshaft friction gear noise or MLA noise
Timing chain noise
RESULTS ACTION
Yes Inspect for the followings:
Engine oil level
Drive belt tension
Splash shield or under cover
looseness
Generator installation (alignment)
No Go to the next step.
Yes Inspect for the followings:
Drive belt tension
P/S fluid level
No Go to the next step.
Yes Inspect rattling location for loose parts.
No Go to the next step.
Yes Inspect for the following:
Vacuum leakage