position (Engine off).
z
Using M-MDS tester, select the
Diagnostic Data Link.
z
Select the PCM.
z
Select the Active Command
Modes.
z
Select the Output Test Mode.
z
Close the CV solenoid valve using
the EVMV PID.
z
Pressurize the EVAP system to
3.48 kPa (PID FTP_H2O displays
"14").
z
Press STOP (#4) on M-MDS tester
to open the EVMV.
z
Does the pressure drop
immediately?
No
Replace the fuel tank vapor line(s). Go to
Step 8.
7
INSPECT FOR MALFUNCTIONING
CV SOLENOID VALVE OR FUEL
TANK PRESSURE SENSOR
z
Were both P0455 and P1443
present at Step 1?
Yes
Replace the CV solenoid valve.
(see
CHARCOAL CANISTER,
CANISTER VENT (CV) SOLENOID
VALVE, AIR FILTER COMPONENT
REMOVAL/INSTALLATION [MZI-
3.5]01-16 EVAPORATIVE EMISSION
CANISTERPURGE VALVE.
)
Go to the next step.
No
Replace the evaporative hose component.
(see
FUEL TANK
REMOVAL/INSTALLATION [MZI-
3.5]
.) Go to the next step.
8
EVAP SYSTEM LEAK TEST
z
Connect all disconnected
connectors and hoses.
z
Perform the EVAP System Leak
Test.
(see
ENGINE CONTROL
SYSTEM OPERATION
INSPECTION [MZI-3.5]
.)
z
Are the test results normal?
Yes
Go to the next step.
No
Leakage still exists. Locate leak point and
repair. Repeat this step.
9
VERIFY TROUBLESHOOTING OF
DTC P0455 HAS BEEN
COMPLETED
Yes
Replace the PCM, then go to the next step.
(see
PCM
REMOVAL/INSTALLATION [MZI-
3.5]
.)
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:33 AM
Page 240
© 2005 Mitchell Repair Information Company, LLC.