Mazda CX-9 Grand Touring 2009 Manual page 1086

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Verify related pending code or stored
DTCs.
Is other DTCs present?
VERIFY TROUBLESHOOTING OF
DTC P0454 HAS BEEN COMPLETED
Verify that all disconnected
connectors reconnected.
Clear the DTC from the PCM memory
using the M-MDS.
4
Perform the "KOEO or KOER self-
test" using the M-MDS.
(See KOEO/KOER SELF TEST
[MZI-3.7].)
Is the PENDING CODE for the DTC
present?
VERIFY AFTER REPAIR
PROCEDURE
Perform the "AFTER REPAIR
5
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-3.7].)
Are any DTCs present?
DTC P0455 [MZI-3.7]
DTC P0455 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0455 Evaporative emission system leak detected (gross leak/no flow)
DETECTION
CONDITION
POSSIBLE
CAUSE
2008 Mazda CX-9 Grand Touring
P0455 indicates that a substantial leak or blockage has been detected in the
EVAP system when there is - 1.74 kPa (PID FTP_H2O displays "-7.0") or less
vacuum for a 30 seconds evaluation time.
After-market EVAP hardware (such as fuel-filler cap) not conforming to
required specifications.
Disconnected or cracked fuel chopping timer tube, CV solenoid valve outlet
tube or EVAP return tube.
CV solenoid valve stuck closed
Damaged or missing fuel-filler cap.
Insufficient fuel-filler cap installation.
Loose fuel vapor hose/tube connections to EVAP system components.
Blockages or restrictions in fuel vapor hoses/tubes.
TROUBLESHOOTING". Then go to the next
No
Replace the PCM, then go to the next step. (See
Yes PCM REMOVAL/INSTALLATION [MZI-
3.7] .)
No Go to the next step.
Go to the applicable DTC inspection. (See DTC
Yes
TABLE [MZI-3.7].)
No Troubleshooting completed.
step.