NO.27 FUEL REFILL CONCERNS [MZI-3.7]
2
z
Electrical connections
z
Vacuum lines
z
Fuel quality
Are all items normal?
Yes
Go to the next step.
No
Service if necessary.
Repeat Step 2.
3
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.
4
Install the fuel pressure gauge
between the fuel pipe and the
fuel distributor.
Start engine and idle it.
Is fuel line pressure correct at
idle?
(See
FUEL LINE PRESSURE
INSPECTION [MZI-3.7]
.)
Yes
Go to the next step.
No
Low:
Inspect fuel pump relay and fuel pump circuit.
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]
.)
5
Inspect the charcoal canister for
fuel saturation.
Is excess amount of liquid fuel
present in canister?
Yes
Replace the charcoal canister.
No
Inspect the fuel tank vent system.
If the fuel tank vent system is normal, suggest trying
a different brand since sulphur content can vary in
different fuels.
If the fuel tank vent system is not normal, repair or
replace the malfunctioning part.
6
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 10:10:06 AM
Page 87
© 2005 Mitchell Repair Information Company, LLC.
