NO.21 ENGINE NOISE [MZI-3.7]
NO.21 ENGINE NOISE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
(See
FUEL LINE PRESSURE
INSPECTION [MZI-3.7]
.)
2
Inspect for blockage/restriction or open
circuit in wiring harness between the
engine vacuum port and the charcoal
canister.
Inspect for blockage in fuel tank vent
system.
Is malfunction indicated?
Yes
Replace vacuum hose.
No
Go to the next step.
3
Inspect the purge solenoid valve.
(See
PURGE SOLENOID VALVE
INSPECTION [MZI-3.7]
.)
Is the solenoid operating properly?
Yes
Go to the next step.
No
Replace the purge solenoid valve.
(See
PURGE SOLENOID VALVE
REMOVAL/INSTALLATION [MZI-
3.7]
.)
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-3.7]
.)
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 CONTROL SYSTEM OPERATION INSPECTION [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]
.)
21
ENGINE NOISE
DESCRIPTION
Engine noise from under hood
Squeal, click or chirp noise:
z
Improper engine oil level
z
Improper drive belt tension
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 78
© 2005 Mitchell Repair Information Company, LLC.
