DTC P053A [MZI-3.7]
DTC P053A (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
6
z
Is the throttle body clogged?
No
Go to the next step.
7
INSPECT ENGINE COMPRESSION
z
Inspect the engine compression. (See
COMPRESSION INSPECTION
[MZI-3.7]
.)
z
Is the engine compression normal?
Yes Go to the next step.
No
Overhaul the engine, then go to Step 9.
8
INSPECT FOR RESTRICTION IN
EXHAUST SYSTEM AND TWC
z
Is there any restriction?
Yes Replace malfunctioning part, then go to the next
step.
No
Go to the next step.
9
VERIFY TROUBLESHOOTING OF
DTC P050E HAS BEEN COMPLETED
z
Verify that all disconnected
connectors are reconnected.
z
Turn the ignition switch to the ON
position (Engine off).
z
Clear the DTC from the PCM memory
using the M-MDS.
z
Perform the "KOEO and KOER self-
test". (See
KOEO/KOER SELF
TEST [MZI-3.7]
.)
z
Retrieve DTCs using the M-MDS.
z
Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step. (See
PCM REMOVAL/INSTALLATION [MZI-
3.7]
.)
No
Go to the next step.
10
VERIFY AFTER REPAIR
PROCEDURE
z
Perform the "AFTER REPAIR
PROCEDURE". (See
AFTER
REPAIR PROCEDURE [MZI-3.7]
.)
z
Are any DTCs present?
Yes
Go to the applicable DTC inspection. (See
DTC
TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
DTC P053A
PCV valve heater control circuit/open
DETECTION
CONDITION
z
This DTC is set when the PCM detects a PCV valve heater circuit
malfunction.
z
Open circuit between PCV valve heater control terminal A and main relay
No.1
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:38 AM
Page 247
© 2005 Mitchell Repair Information Company, LLC.
