NO.22 VIBRATION CONCERNS (ENGINE) [MZI-3.7]
z
Generator installation (alignment)
No
Go to the next step.
2
Is a rumbling or grinding
noise present?
Yes
Inspect for the followings:
z
Drive belt tension
z
P/S fluid level
No
Go to the next step.
3
Is a rattling noise present?
Yes
Inspect rattling location for loose parts.
No
Go to the next step.
4
Is a hissing noise present?
Yes
Inspect for the following:
z
Vacuum leakage
z
Spark plug looseness
z
Intake-air system leakage
No
Go to the next step.
5
Is a rapping or roar noise
present?
Yes
Inspect looseness for followings:
z
Dynamic dumper
z
Intake-air system
z
Exhaust system
No
Go to the next step.
6
Is a knocking noise present?
Yes
Go to symptom troubleshooting "No. 13
Knocking/pinging".
(See
NO.13 KNOCKING/PINGING-
ACCELERATION/CRUISE [MZI-3.7]
.)
No
If the noise comes from the engine internal, inspect for
friction gear, timing chain or MLA noise.
7
z
Verify test results.
{
If normal, return to diagnostic index to service any additional symptoms.
(See
SYMPTOM DIAGNOSTIC INDEX [MZI-3.7]
.)
{
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-3.7]
.)
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:10:05 AM
Page 80
© 2005 Mitchell Repair Information Company, LLC.
