NO.21 ENGINE NOISE [MZI-3.5]
DESCRIPTION AND POSSIBLE CAUSES
4
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?
Yes
DTC is displayed:
Go to the appropriate DTC inspection.
(see
DTC TABLE [MZI-3.5]
.)
No
No DTC is displayed:
Inspect charcoal canister for fuel
saturation.
If excess amount of liquid fuel is
present, replace the charcoal canister.
5
z
Verify test results.
{
If normal, return to diagnostic index to service any additional symptoms.
(See
ENGINE SYMPTOM TROUBLESHOOTING [MZI-3.5]
.)
{
If malfunction remains, inspect related Service Bulletins and/or On-line Repair
Information and perform repair or diagnosis.
z
If vehicle is repaired, troubleshooting completed.
z
If vehicle is not repaired or additional diagnostic information is not
available, replace the PCM.
(see
PCM REMOVAL/INSTALLATION [MZI-3.5]
.)
21
ENGINE NOISE
DESCRIPTION
Engine noise from under hood
Squeal, click or chirp noise:
z
Improper engine oil level
z
Improper drive belt tension
z
Generator installation (alignment)
z
Splash shield or under cover looseness (splashed water to drive belts)
Rattle sound noise:
z
Loose parts
Hiss sound noise:
z
Vacuum leakage
z
Loose spark plug
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:37 AM
Page 76
© 2005 Mitchell Repair Information Company, LLC.