Mazda CX-9 Grand Touring 2009 Manual page 1085

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
memory using the M-MDS.
Start the engine and warm it up
completely.
Is same DTC present?
VERIFY AFTER REPAIR
PROCEDURE
Perform the "After Repair
10
Procedure". (See AFTER REPAIR
PROCEDURE [MZI-3.7].)
Are any DTCs present?
DTC P0454 [MZI-3.7]
DTC P0454 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0454
DETECTION
CONDITION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DTC P0454 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Verify related Service Bulletins and/or
2
on-line repair information availability.
Is any related Service Bulletins
available?
VERIFY RELATED PENDING CODE
OR STORED DTCs
3
Turn the ignition switch off then to the
ON position (Engine off).
2008 Mazda CX-9 Grand Touring
Fuel tank pressure sensor intermittent
The fuel tank pressure changes more than 14 inches of water in 0.10 s.
Intermittent open or short in the fuel tank pressure sensor or the fuel
tank pressure sensor signal
Fuel tank pressure sensor malfunction
INSPECTION
No Go to the next step.
Go to the applicable DTC inspection. (See DTC
Yes
TABLE [MZI-3.7].)
No Troubleshooting completed.
Yes Go to the next step.
Record FREEZE FRAME DATA on the repair
No
order, then go to the next step.
Perform repair or diagnosis according to the
available Service Bulletins.
Yes
If the vehicle is not repaired, go to the
next step.
No Go to the next step.
Go to the appropriate DTC troubleshooting. (See
Yes
DTC TABLE [MZI-3.7].)
Perform the "INTERMITTENT CONCERN
ACTION