9
z
Turn the ignition switch to the ON position
(Engine off)
z
Close CV solenoid valve using the
EVAPCV PID from the output test mode.
z
Pressurize EVAP system to 3.48 kPa (PID
FTP_H2O displays "14").
z
Does the pressure hold between 3.43 and
3.53 kPa (PID FTP_H2O displays "13.80"
and "14.20")?
Yes Go to Step 13.
No
Go to Step 10.
10
INSPECT FOR LEAKS IN COMPLETE
EVAP SYSTEM
z
Verify CV solenoid valve is closed.
z
Verify system is pressurized to 3.48 kPa
(PID FTP_H2O displays "14").
z
Using the ultrasonic leak detector, check the
following EVAP system locations:
{
EVAP return tube to CV solenoid
valve.
{
CV solenoid valve to charcoal
canister-CV solenoid valve
component.
{
Charcoal canister-CV solenoid valve
component to fuel tank.
{
fuel-filler cap and fuel-filler pipe.
z
Is a leak detected?
Yes Repair or replace the component if
necessary. Go to Step 13.
No
Discontinue pressurizing the system. Go to
the next step.
11
INSPECT FOR SMALL LEAK FROM EVAP
RETURN TUBE TO CHARCOAL CANISTER
z
Disconnect the fuel tank vapor tube at the
fuel fuel vapor hose joint and plug the
opening in the hose joint.
z
Turn the ignition switch to the ON position
(Engine off)
z
Close CV solenoid valve using the
EVAPCV PID from the output test mode.
z
Pressurize the EVAP system to 3.48 kPa
(PID FTP_H2O displays "14").
z
Using the ultrasonic leak detector, check the
EVAP system from the intake manifold to
the CV solenoid valve.
z
Is a leak detected?
Yes Repair or replace the component if
necessary. Go to Step 13.
No
Open the CV solenoid valve. Go to the
next step.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:37 AM
Page 203
© 2005 Mitchell Repair Information Company, LLC.
