NO.20 FUEL ODOR (IN ENGINE COMPARTMENT) [MZI-3.7]
4
z
Collapsed or restricted
intake-air system
z
Restricted fuel return line
Are all items normal?
No
Service if necessary.
Repeat Step 4.
5
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:
Go to the next step.
6
Install the fuel pressure gauge
between the fuel pipe and the fuel
distributor.
Start the engine and idle it.
Measure fuel line pressure during
idle.
Is fuel line pressure correct during
idle?
(See
FUEL LINE PRESSURE
INSPECTION [MZI-3.7]
.)
Yes
Go to the next step.
No
Low:
Inspect the fuel line for clogging.
If there is no malfunction, replace the fuel pump
unit.
(See
FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-3.7]
.)
High:
Replace the fuel pump unit.
(See
FUEL PUMP UNIT
REMOVAL/INSTALLATION [MZI-3.7]
.)
7
Perform the spark test.
(See
ENGINE CONTROL
SYSTEM OPERATION
INSPECTION [MZI-3.7]
.)
Is strong blue spark visible at
each cylinder?
Yes
Inspect the CMP sensor.
(See
CAMSHAFT POSITION (CMP) SENSOR
INSPECTION [MZI-3.7]
.)
No
Repair or replace the malfunctioning part according
to spark test result.
8
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 76
© 2005 Mitchell Repair Information Company, LLC.
