Mazda CX-9 Grand Touring 2007 Manual page 895

2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
5 Is a rapping or roar noise present?
6 Is a knocking noise present?
7
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.
NO.22 VIBRATION CONCERNS (ENGINE) [MZI-3.5]
DESCRIPTION AND POSSIBLE CAUSES
22 VIBRATION CONCERNS (ENGINE)
DESCRIPTION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DIAGNOSTIC INDEX
STEP INSPECTION
2007 Mazda CX-9 Grand Touring
If vehicle is repaired, troubleshooting completed.
If vehicle is not repaired or additional diagnostic information is not
available, replace the PCM.
(see PCM REMOVAL/INSTALLATION [MZI-3.5] .)
Vibration from under hood or driveline
Loose attaching bolts or worn parts
Components malfunction such as worn parts
Spark plug looseness
Intake-air system leakage
No Go to the next step.
Yes Inspect looseness for followings:
Dynamic dumper
Intake-air system
Exhaust system
No Go to the next step.
Yes Go to symptom troubleshooting "No.13
Knocking/pinging".
(See NO.13 KNOCKING/PINGING-
ACCELERATION/CRUISE [MZI-
3.5].)
No If the noise comes from the engine
internal, inspect for friction gear, timing
chain or MLA noise.
RESULTS ACTION