Mazda CX-9 Grand Touring 2009 Manual page 1200

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Verify kinks or bends in the fuel
vapor hoses and tubes.
Visually inspect the charcoal
canister inlet port, CV solenoid
4
valve, EVAP dust separator or the
outlet hose for contamination or
foreign material.
Is a concern evident?
PERFORM EVAP LEAK TEST
Connect the EVAP Leak Tester to
the fuel filler pipe.
Close the purge solenoid valve using
5
the EVMV PID.
Pressurize the EVAP system to 3.48
kPa (PID FTP_H2O displays "14").
Does the pressure reach 3.48 kPa
(PID FTP_H2O displays "14")?
INSPECT WHETHER CV SOLENOID
VALVE IS STUCK CLOSED
Open the purge solenoid valve using
6
the EVMV PID.
Does the pressure drop
immediately?
INSPECT FOR FUEL TANK
PRESSURE SENSOR PID WITHOUT
PRESSURE APPLIED
Disconnect the charcoal canister
outlet tube at the charcoal canister.
Turn the ignition switch to the ON
position (Engine off)
7
Using M-MDS tester, select
Diagnostic Data Link.
Select PCM.
Select Active Command Modes.
Access FTP V PID and record the
reading.
Is the reading between 2.40 to 2.80
V?
EVAP SYSTEM LEAK TEST
2008 Mazda CX-9 Grand Touring
Remove any contamination or foreign material
around fuel vapor hoses and tubes.
Yes
Repair the hoses, tubes or components if
necessary. Go to Step 9.
No
Yes Go to the next step.
Check to see if the CV solenoid valve is stuck
(See CHARCOAL CANISTER, CANISTER
No VENT (CV) SOLENOID VALVE, AIR
REMOVAL/INSTALLATION [MZI-3.7] .)
Yes Go to the next step.
Check to see if the CV solenoid valve is stuck
(See CHARCOAL CANISTER, CANISTER
No VENT (CV) SOLENOID VALVE, AIR
REMOVAL/INSTALLATION [MZI-3.7] .)
Yes Go to the next step.
Replace the evaporative hose component.
(See FUEL TANK PRESSURE SENSOR
No
Go to the next step.
open. Replace if necessary.
FILTER COMPONENT
Go to Step 9.
closed. Replace if necessary.
FILTER COMPONENT
Go to Step 9.
INSPECTION [MZI-3.7] .)
Go to the next step.