Mazda CX-9 Grand Touring 2009 Manual page 1064

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Are there gas leakage?
INSPECT INSTALLATION OF FRONT
AND REAR HO2S
5
Inspect for looseness of front and rear
HO2Ss.
Are they it normal?
INSPECT TWC
Clear the DTC using the M-MDS.
Cycle the ignition switch off then back
6
to the ON position.
Inspect the TWC.
Is it normal?
VERIFY TROUBLESHOOTING OF
DTC P0420, P0430 HAS BEEN
COMPLETED
Verify that all disconnected
connectors are reconnected.
Turn the ignition switch to the ON
7
position (Engine off).
Clear the DTC from the PCM memory
using the M-MDS.
Start the engine and run it at idle.
Retrieve DTCs using the M-MDS.
Is the PENDING CODE for this DTC
present?
VERIFY AFTER REPAIR
PROCEDURE
Perform the "AFTER REPAIR
8
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-3.7].)
Are any DTC present?
DTC P0442, P0456 [MZI-3.7]
DTC P0442, P0456 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0442 P0442: Evaporative emission system leak detected (small leak)
DTC P0456 P0456: Evaporative emission system leak detected (very small leak)
2008 Mazda CX-9 Grand Touring
P0442 indicates that a leak has been detected as small as 1 mm (0.04 in) in the
Yes Go to the next step.
No Retighten sensor, then go to Step 7.
Yes Go to the next step.
No Replace the TWC, then go to the next step.
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.