Mazda CX-9 Grand Touring 2009 Manual page 1065

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
DETECTION
CONDITION
POSSIBLE
CAUSE
DIAGNOSTIC PROCEDURE
DTC P0442, P0456 (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
2
Verify related Service Bulletins and/or on-
line repair information availability.
Is any related Service Bulletins available?
VERIFY RELATED PENDING CODE OR
STORED DTCs
Turn the ignition switch off then to the ON
3
position (Engine off).
Verify related pending code or stored DTCs.
Is other DTCs present?
EVAP SYSTEM LEAK TEST
Carry out the EVAP system leak inspection
using the M-MDS. (See ENGINE
4
CONTROL SYSTEM OPERATION
INSPECTION [MZI-3.7] .)
Is small or large leakage detected?
EVAP SYSTEM LEAK TEST
2008 Mazda CX-9 Grand Touring
EVAP vapor management valve solenoid system when there is less than 0.625
kPa (PID FTP_H2O displays "2.5") bleed-up over 15 s at 75% fuel fill. Bleed-up
and evaluation time vary as a function of fuel fill level. The vapor generation
limit is more than 0.625 kPa (PID FTP_H2O displays "2.5") over 120 s.
P0456 indicates that a fuel vapor leak from an opening as small as 0.508 mm
{0.020 in} has been detected by the EVAP running loss monitor test.
After-market EVAP hardware (such as fuel-filler cap) nonconforming to
required specifications.
Small holes or cuts in fuel vapor hoses/tubes (P0442, P0456).
CV solenoid stays partially open on closed command.
Damaged, cross-threaded or loosely installed fuel-filler cap.
EVAP system component seals leaking.
INSPECTION ACTION
Yes Go to the next step.
Record FREEZE FRAME DATA on the
No
repair 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
Yes troubleshooting. (See DTC TABLE
[MZI-3.7].)
No Go to the next step.
Yes Go to the next step.
No Go to Step 6.