Mazda CX-9 Grand Touring 2009 Manual page 1378

Electrical connections
Vacuum lines
Fuel quality
2
Are all items normal?
Connect the M-MDS to the
DLC-2.
Turn the ignition switch to the
3
ON position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
Install the fuel pressure gauge
between the fuel pipe and the
fuel distributor.
Start engine and idle it.
4
Is fuel line pressure correct at
idle?
(See FUEL LINE PRESSURE
INSPECTION [MZI-3.7] .)
Inspect the charcoal canister for
fuel saturation.
5
Is excess amount of liquid fuel
present in canister?
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
6
Information and perform repair or diagnosis.
NO.27 FUEL REFILL CONCERNS [MZI-3.7]
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Yes
No
Yes
No
Yes
No
Yes
No
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-3.7] .)
Go to the next step.
Service if necessary.
Repeat Step 2.
DTC is displayed:
Go to the appropriate DTC inspection.
(See DTC TABLE [MZI-3.7] .)
No DTC is displayed:
Go to the next step.
Go to the next step.
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] .)
Replace the charcoal canister.
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.
Low: