Mazda CX-9 Grand Touring 2007 Manual page 611

2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
EXHAUST SYSTEM AND TWC
Is there any restriction?
9 VERIFY TROUBLESHOOTING OF
DTC P050E HAS BEEN
COMPLETED
Verify that all disconnected
connectors are reconnected.
Turn the ignition switch to the ON
position (Engine off).
Clear the DTC from the PCM
memory using the M-MDS.
Perform the "KOEO and KOER
self-test".
(See KOEO/KOER SELF TEST
[MZI-3.5].)
Retrieve DTCs using the M-MDS.
Is the PENDING CODE for this
DTC present?
10 VERIFY AFTER REPAIR
PROCEDURE
Perform the "AFTER REPAIR
PROCEDURE".
(See AFTER REPAIR
PROCEDURE [MZI-3.5].)
Are any DTCs present?
DTC P053A [MZI-3.5]
DTC P053A (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES
DTC P053A
DETECTION
CONDITION
2007 Mazda CX-9 Grand Touring
PCV valve heater control circuit/open
This DTC is set when the PCM detects a PCV valve heater circuit malfunction.
Open circuit between PCV valve heater control terminal A and main relay No.1
Open circuit between PCV valve heater fitting terminal A and main relay No.1
Short to ground circuit between PCV valve heater control terminal B and PCM
terminal 2BL
the next step.
No Go to the next step.
Yes Replace the PCM, then go to the next step.
(see PCM
REMOVAL/INSTALLATION [MZI-
3.5] .)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.5].)
No Troubleshooting completed.